CN213457288U

CN213457288U - Experimental system for simulating thermal runaway induced by external short circuit of lithium battery

Info

Publication number: CN213457288U
Application number: CN202022673486.9U
Authority: CN
Inventors: 雷柏伟; 孟龙川; 杜珮颖
Original assignee: China University of Mining and Technology Beijing CUMTB
Current assignee: China University of Mining and Technology Beijing CUMTB
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-06-15
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a simulation lithium cell outer short circuit induces thermal runaway experimental system, including box, camera, temperature detection instrument and driving motor, the lower surface of box is breach column structure, explosion-proof glass's rear side is provided with the mounting panel that is connected with the box, the inside top fixedly connected with fixed plate of box, sheathed tube inside bottom is connected with the film, the top surface of inner bag is connected with the connecting plate, the temperature detection instrument is installed to the inner wall of box, the internally mounted of landing leg has driving motor, and driving motor's output is connected with the threaded rod, the below of box is provided with the diaphragm, and the upper surface of diaphragm is connected with the rubber pad, the upper surface of rubber pad is connected with the support plate. The experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery has the advantages that when the fire is in a small state, the fire extinguishing agent does not need to be manually sprayed to extinguish the fire, and the experimental system is not only simple and convenient to use, but also safe.

Description

Experimental system for simulating thermal runaway induced by external short circuit of lithium battery

Technical Field

The utility model relates to a lithium cell technical field specifically is a simulation lithium cell outer short circuit induces thermal runaway experimental system.

Background

In recent years, the development of lithium battery technology has led to the rapid popularization and use of new energy vehicles, but the new energy vehicles can lead to the short circuit of the lithium battery under the conditions of collision accidents and the like, so that the thermal runaway of the battery is caused and further the combustion and explosion are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the outer short circuit of a simulation lithium cell that proposes induces thermal runaway experimental system.

In order to achieve the above object, the utility model provides a following technical scheme: the experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery comprises a box body, a camera, a temperature detector and a driving motor, wherein the lower surface of the box body is of a notch-shaped structure, explosion-proof glass is connected to the surface of the rear end of the box body, a mounting plate connected with the box body is arranged on the rear side of the explosion-proof glass, the camera is arranged on the surface of the front end of the mounting plate, a fixing plate is fixedly connected to the top end of the interior of the box body, a sleeve is fixedly inserted into the fixing plate, a thin film is connected to the bottom end of the interior of the sleeve, an inner container is arranged above the thin film, a connecting plate is connected to the outer surface of the top of;

the temperature detection instrument is installed to the inner wall of box, and the outside of temperature detection instrument is provided with all there is welded landing leg in both ends surface about the box, the internally mounted of landing leg has driving motor, and driving motor's output is connected with the threaded rod, the below of box is provided with the diaphragm, and the upper surface of diaphragm is connected with the rubber pad, the upper surface of rubber pad is connected with the support plate.

Preferably, the cross section of the mounting plate is of a U-shaped structure, and the mounting plate and the box body are fixed in a bolt connection mode.

Preferably, the sleeves are arranged on the box body at equal intervals, the connecting mode of the sleeves and the inner container is clamping connection, and the connecting mode of the inner container and the baffle is threaded connection.

Preferably, the inner end surface of the supporting leg is of a groove-shaped structure, and the driving motor and the threaded rod are both located inside the groove-shaped structure.

Preferably, both ends all are the bulge column structure about the diaphragm, and this bulge column structure is connected with the slot-like structure block of the inner surface of landing leg to the diaphragm is elevation structure on the landing leg.

Preferably, the upper surface and the lower surface of the rubber pad are respectively connected with the transverse plate and the support plate in a sticking manner, the cross section size of the support plate is the same as that of the notch-shaped structure on the lower surface of the box body, and the positions of the transverse section size and the cross section size correspond to each other.

Compared with the prior art, the beneficial effects of the utility model are that: the experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery does not need to manually spray a fire extinguishing agent to extinguish the fire when the fire is small, and is simple, convenient and safe to use;

1. when a fire breaks out in the box body, the internal air pressure is reduced, and the external air pressure can extrude the liner, so that the liner breaks the film, the dry powder in the liner is sprayed out to extinguish the fire, and the whole process is automatic;

2. when the dry powder with large fire-blocking intensity is not enough to extinguish the fire, the liner can be drawn out from the sleeve, and then the fire extinguishing agent is sprayed into the box body through the sleeve as an inlet, so that the safety is ensured;

3. the temperature detector can be used for monitoring the temperature change in the box body in real time when the lithium battery is in short circuit, so that the temperature detector can record the temperature change in the box body, the limit temperature of explosion after the lithium battery is in short circuit is detected, and meanwhile, the explosion-proof glass and the camera are used for facilitating observation of physical change of the short-circuited lithium battery in the box body by people.

Drawings

FIG. 1 is a front view of the cross-sectional structure of the present invention;

fig. 2 is a schematic rear view of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

fig. 4 is a schematic view of the mounting plate of the present invention.

In the figure: 1. a box body; 2. explosion-proof glass; 3. mounting a plate; 4. a camera; 5. a fixing plate; 6. a sleeve; 7. a film; 8. an inner container; 9. a connecting plate; 10. a baffle plate; 11. a temperature detector; 12. a support leg; 13. a drive motor; 14. a threaded rod; 15. a transverse plate; 16. a rubber pad; 17. and a carrier plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an experimental system for simulating the thermal runaway induced by the external short circuit of a lithium battery comprises a box body 1, explosion-proof glass 2, a mounting plate 3, a camera 4, a fixing plate 5, a sleeve 6, a film 7, an inner container 8, a connecting plate 9, a baffle 10, a temperature detector 11, supporting legs 12, a driving motor 13, a threaded rod 14, a transverse plate 15, a rubber pad 16 and a support plate 17, wherein the lower surface of the box body 1 is of a notch-shaped structure, the surface of the rear end of the box body 1 is connected with the explosion-proof glass 2, the rear side of the explosion-proof glass 2 is provided with the mounting plate 3 connected with the box body 1, the surface of the front end of the mounting plate 3 is provided with the camera 4, the top end of the inner part of the box body 1 is fixedly connected with the fixing plate 5, the sleeve 6 is fixedly inserted in the fixing plate 5, the bottom end of the inner, the upper surface of the inner container 8 is connected with a baffle 10;

the inner wall of the box body 1 is provided with a temperature detector 11, the outer side of the temperature detector 11 is provided with support legs 12 welded on the surfaces of the left end and the right end of the box body 1, the inner end surface of each support leg 12 is in a groove-shaped structure, a driving motor 13 and a threaded rod 14 are both positioned in the groove-shaped structure, so that parts such as the driving motor 13 and the like are hidden and installed conveniently, the driving motor 13 is installed in each support leg 12, the output end of the driving motor 13 is connected with the threaded rod 14, a transverse plate 15 is arranged below the box body 1, the upper surface of the transverse plate 15 is connected with a rubber pad 16, the left end and the right end of the transverse plate 15 are both in a convex structure, the convex structure is clamped and connected with the groove-shaped structures on the inner end surfaces of the support legs 12, the transverse plate 15 is in a lifting structure on the support legs, the upper surface of the rubber pad 16 is connected with a support plate 17, the upper surface and the lower surface of the rubber pad 16 are respectively connected with the transverse plate 15 and the support plate 17 in a sticking way, the cross section size of the support plate 17 is the same as that of the notch-shaped structure on the lower surface of the box body 1, and the positions of the cross section size and the cross section size correspond to each other, so that the lower surface of the box body 1 can be completely sealed by the support plate 17.

The cross-section of mounting panel 3 is "U" font structure, and mounting panel 3 and box 1 fix through bolted connection's mode, utilizes mounting panel 3 to be convenient for install camera 4 to see through explosion-proof glass 2 and observe the inside condition of box 1.

The sleeve 6 is equidistant on the box 1, and the connected mode of sleeve 6 and inner bag 8 is the block connection to the connected mode of inner bag 8 and baffle 10 is threaded connection, utilizes sleeve 6 and inner bag 8 to be convenient for spray the dry powder toward the inside of box 1 voluntarily.

The working principle is as follows: when the experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery is used, firstly, the inner container 8 is inserted into the sleeve 6, then, dry powder is filled into the inner container 8, and the top end of the inner container 8 is plugged by the baffle 10;

then, a worker places the lithium battery on the support plate 17, connects a metal wire with the positive electrode and the negative electrode of the lithium battery, starts the driving motor 13 with the model number of Y90S-2, enables the threaded rod 14 to rotate, pushes the transverse plate 15 to move, drives the support plate 17 to lift, and sends the lithium battery into the box body 1, and when the lithium battery is about to enter the box body 1, the worker starts the lithium battery to cause short circuit;

after the lithium battery enters the box body 1, the temperature detector 11 monitors the temperature inside the box body 1 in real time, transmits the data of the temperature change inside the box body 1 to a computer for collection, and simultaneously, the camera 4 arranged on the mounting plate 3 monitors the lithium battery inside the box body 1 through the explosion-proof glass 2 so as to observe the physical change of the lithium battery;

when the short circuit of the lithium battery is gradually heated to the limit, the lithium battery will explode and fire, at the moment, because the air inside the box body 1 is burnt, the internal air pressure will be reduced, the baffle 10 and the inner container 8 will be gradually extruded into the box body 1 due to the action of the external air pressure, at this time, the inner container 8 will puncture the film 7, the dry powder in the film 7 can be spilled out to extinguish fire, the film 7 can not be punctured by the pressure in time, the film 7 can be burnt due to the burning of flame, so that the dry powder can be spilled out, if the fire is large and the dry powder can not extinguish the fire, the inner container 8 can be drawn out at the moment, so that the sleeve 6 is used as an inlet, in the past, fire extinguishing agents are sprayed inside the box body 1, which is the whole process of using the experimental system for simulating the external short circuit of the lithium battery to induce the thermal runaway, and the content which is not described in detail in the specification belongs to the prior art which is well known to a person skilled in the art.

The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a simulation lithium cell external short circuit induces thermal runaway experimental system, includes box (1), camera (4), temperature detection instrument (11) and driving motor (13), its characterized in that: the lower surface of the box body (1) is of a notch-shaped structure, the rear end surface of the box body (1) is connected with explosion-proof glass (2), the rear side of the explosion-proof glass (2) is provided with an installation plate (3) connected with the box body (1), the front end surface of the installation plate (3) is provided with a camera (4), the top end of the interior of the box body (1) is fixedly connected with a fixing plate (5), a sleeve (6) is fixedly inserted into the interior of the fixing plate (5), the bottom end of the interior of the sleeve (6) is connected with a thin film (7), an inner container (8) is arranged above the thin film (7), the outer surface of the top of the inner container (8) is connected with a connecting plate (9), and the upper surface of the inner container (8) is connected with;

temperature detection instrument (11) are installed to the inner wall of box (1), and the outside of temperature detection instrument (11) is provided with and all has welded landing leg (12) in both ends surface about box (1), the internally mounted of landing leg (12) has driving motor (13), and the output of driving motor (13) is connected with threaded rod (14), the below of box (1) is provided with diaphragm (15), and the upper surface of diaphragm (15) is connected with rubber pad (16), the last surface connection of rubber pad (16) has support plate (17).

2. The experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery as claimed in claim 1, wherein: the cross section of the mounting plate (3) is of a U-shaped structure, and the mounting plate (3) and the box body (1) are fixed in a bolt connection mode.

3. The experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery as claimed in claim 1, wherein: the sleeve (6) is arranged on the box body (1) at equal intervals, the sleeve (6) and the liner (8) are connected in a clamping mode, and the liner (8) and the baffle (10) are connected in a threaded mode.

4. The experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery as claimed in claim 1, wherein: the inner end surface of the supporting leg (12) is of a groove-shaped structure, and the driving motor (13) and the threaded rod (14) are both located in the groove-shaped structure.

5. The experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery as claimed in claim 1, wherein: both ends all are protruding column structure about diaphragm (15), and this protruding column structure and landing leg (12) inner end surface's slot-shaped structure block is connected to diaphragm (15) is elevation structure on landing leg (12).

6. The experimental system for simulating the thermal runaway induced by the external short circuit of the lithium battery as claimed in claim 1, wherein: the upper surface and the lower surface of the rubber pad (16) are respectively connected with the transverse plate (15) and the support plate (17) in a sticking way, and the cross section size of the support plate (17) is the same as that of the notch-shaped structure on the lower surface of the box body (1), and the positions of the transverse section size and the cross section size are corresponding.