CN116190897A

CN116190897A - PET and silica gel frame packaging structure for power battery

Info

Publication number: CN116190897A
Application number: CN202310470927.0A
Authority: CN
Inventors: 杨传奇; 李青云; 杨青春
Original assignee: Shenzhen Boshuo Science And Technology Co ltd
Current assignee: Shenzhen Boshuo Science And Technology Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-05-30
Anticipated expiration: 2043-04-27
Also published as: CN116190897B

Abstract

The invention discloses a PET and silica gel frame packaging structure for a power battery, which relates to the technical field of power battery packaging structures, and comprises a silica gel frame, wherein the silica gel frame is provided with a containing through groove for placing a power supply, and the structure further comprises: the two PET layers are used for sealing outlets at the upper end and the lower end of the silica gel frame and forming a sealed space inside the silica gel frame; and the exhaust component is arranged in the accommodating through groove of the silica gel frame, and when the air pressure in the accommodating through groove exceeds a preset value, the exhaust component enables air in the accommodating through groove to be exhausted from the direction vertical to the arrangement direction of the silica gel frame. According to the invention, the air in the accommodating through groove is exhausted from the direction perpendicular to the arrangement direction of the silica gel frame through the exhaust component, and the direction of air injection during pressure relief is controlled, so that the influence on other power batteries arranged side by side is reduced, the time of continuous reaction on adjacent batteries is prolonged, the time of great combustion of the batteries is prolonged, the time is provided for escape of passengers, and the safety is further improved.

Description

PET and silica gel frame packaging structure for power battery

Technical Field

The invention relates to the technical field of power battery packaging structures, in particular to a PET and silica gel frame packaging structure for a power battery.

Background

With the development and use of new energy technology, new energy electric vehicles gradually start to occupy the market, and the vehicle-mounted power battery system is a core power source of the electric vehicles and is better than the engine of the traditional internal combustion engine.

At present, in order to prevent that it receives collision damage at the in-process that the car was driven, can utilize packaging structure to protect it, like chinese patent publication No. CN206976454U, it discloses a PET for power battery and the thermal-insulated cotton integrated configuration of silica gel frame encapsulation, this structure inlays thermal-insulated cotton in the accommodation through groove of silica gel frame to utilize the silica gel frame to have fine cushioning effect, thermal-insulated cotton it has fine thermal-insulated effect, upper and lower PET layer both is buffer-resistant also high temperature resistant, thereby has protected the battery well, has improved life, has solved the potential safety hazard.

The packaging structure can buffer and insulate the battery, but the battery is in a closed environment when the battery is packaged, when thermal runaway occurs under the conditions of short circuit, too fast charge or over discharge and the like, high-temperature and high-pressure gas sprayed out of the battery can be accumulated in the packaging structure, so that the phenomenon of further deflagration of the internal battery is easily caused, the risk of explosion of the battery is increased, and the potential safety hazard under extreme conditions is further improved.

Disclosure of Invention

The invention aims to provide a PET and silica gel frame packaging structure for a power battery, which solves at least one technical problem in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions: PET and silica gel frame packaging structure for power battery, including the silica gel frame, the silica gel frame has the holding logical groove that supplies the battery to put into, still includes:

the two PET layers are used for sealing outlets at the upper end and the lower end of the silica gel frame and forming a sealed space inside the silica gel frame;

and the exhaust component is arranged in the accommodating through groove of the silica gel frame, and when the air pressure in the accommodating through groove exceeds a preset value, the exhaust component enables air in the accommodating through groove to be exhausted from the direction vertical to the arrangement direction of the silica gel frame.

Preferably, the exhaust assembly comprises an inner step integrally formed on the inner wall of the through groove of the silica gel frame, and protruding plugs are fixed on the upper side and the lower side of the inner step;

still including fixing the clamping layer at PET layer outer wall, be equipped with the elastic component between clamping layer and the PET layer, the clamping layer corresponds the position that protruding stopper is fixed with the exhaust intubate, just protruding stopper can insert in the exhaust intubate to seal the exhaust intubate, the outer wall on PET layer is opened there is confession exhaust intubate and inserts and gliding exhaust hole.

Preferably, the elastic piece is including fixing the elastic bag between clamping layer and PET layer, just the elastic bag intussuseption is filled with inert gas, the intercommunicating pore with the elastic bag intercommunication has been seted up to the outer wall of clamping layer, the circular slot has been seted up to the inner wall of intercommunicating pore, and the diameter of circular slot is greater than the internal diameter of intercommunicating pore, be equipped with in the circular slot and be used for carrying out confined sealing ball with the intercommunicating pore, just the circular slot part of clamping layer adopts elastic deformation's material preparation.

Preferably, the inside of interior step is equipped with interior muscle, just in the protruding stopper of its upper and lower both sides is inserted respectively to the both ends of interior muscle, the cavity groove has been seted up to the inside that interior step is located interior muscle intermediate position, just the cavity groove can supply interior muscle to bend.

Preferably, a surface of the inner step, which is positioned in the accommodating through groove, is set as a first convex surface.

Preferably, the inner wall of the silica gel frame accommodating through groove and the inner walls of the two PET layers are respectively attached with a heat insulation layer.

Preferably, the heat insulation layer adopts pre-oxidized fiber aerogel.

Preferably, one surface of the clamping layer facing the silica gel frame accommodating through groove is set to be a second convex surface.

Preferably, the thermal insulation layer on the PET layer is attached to the outer wall of the clamping layer.

Preferably, the exhaust cannula and the protruding plug are in interference fit.

Preferably, the inner wall of the elastic bag is provided with an inward folding type.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the air in the accommodating through groove is exhausted from the direction perpendicular to the arrangement direction of the silica gel frame through the exhaust component, and the direction of air injection during pressure relief is controlled, so that the influence on other power batteries arranged side by side is reduced, the time of continuous reaction on adjacent batteries is prolonged, the time of great combustion of the batteries is prolonged, the time is provided for escape of passengers, and the safety is further improved.

Drawings

FIG. 1 is a perspective view of the packaged structure of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3 in accordance with the present invention;

FIG. 5 is a cut-away perspective view of the view of FIG. 4 in accordance with the present invention;

FIG. 6 is a state diagram of the PET layer of the present invention being open;

fig. 7 is a partial cross-sectional view of an elastic bladder of the present invention.

In the figure: 1. a silica gel frame; 2. a PET layer; 3. an inner step; 4. a protruding plug; 5. an inner rib; 6. a cavity groove; 7. a first convex surface; 8. a clamping layer; 9. an elastic bag; 10. a communication hole; 11. a sealing ball; 12. a vent cannula; 13. an exhaust hole; 14. a second convex surface; 15. and a heat insulation layer.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 7, the present invention provides the following technical solutions: PET and silica gel frame packaging structure for power battery, including silica gel frame 1, silica gel frame 1 has the accommodation logical groove that supplies the battery to put into, still includes:

the two PET layers 2 are used for sealing outlets at the upper end and the lower end of the silica gel frame 1 and forming a sealed space inside the silica gel frame;

and the exhaust component is arranged in the accommodating through groove of the silica gel frame 1, and when the air pressure in the accommodating through groove exceeds a preset value, the exhaust component enables the air in the accommodating through groove to be exhausted from the direction vertical to the arrangement direction of the silica gel frame 1.

According to investigation, when the thermal runaway phenomenon of the power battery occurs, the power battery can be roughly divided into four stages, namely, one stage, the temperature of the battery is rapidly increased, and the swelling is started, and when the swelling reaches the limit, one end of the battery is exploded and sprayed, the other end of the battery is exploded and sprayed, and the two stages and the three stages are simultaneously accompanied by flame spraying when high-temperature high-pressure gas is sprayed, and the four stages are started to burn until the battery is finished;

when the two-three-stage battery explodes and sprays high-temperature and high-pressure gas, the air pressure in the accommodating through groove of the silica gel frame 1 can be increased, when the internal air pressure exceeds a preset value, the air in the accommodating through groove is exhausted from the direction vertical to the arrangement direction of the silica gel frame 1 by the air exhausting component, the air spraying direction is controlled when the pressure is released, the influence on other power batteries arranged side by side is reduced, the reaction time of adjacent batteries is prolonged, the time of the battery burning greatly is prolonged, the time is provided for escape of passengers, and the safety is further improved.

In one preferred embodiment, the exhaust assembly comprises an inner step 3 integrally formed on the inner wall of the accommodating through groove of the silica gel frame 1, and protruding plugs 4 are fixed on the upper side and the lower side of the inner step 3;

still including fixing the clamping layer 8 at PET layer 2 outer wall, be equipped with the elastic component between clamping layer 8 and the PET layer 2, clamping layer 8 corresponds the position of protruding stopper 4 and is fixed with exhaust intubate 12, just protruding stopper 4 can insert in the exhaust intubate 12 to seal exhaust intubate 12, the outer wall on PET layer 2 has opened and supplies exhaust intubate 12 to insert and gliding exhaust hole 13.

Referring to fig. 4 and 6, when outlets at the upper end and the lower end of the silica gel frame 1 are closed, the PET layer 2 at the upper side and the lower side can enable the exhaust insertion pipe 12 to be inserted into the raised plug 4 to seal the exhaust insertion pipe 12, then the clamping layer 8 is tightly attached to the inner step 3 under the action of the elastic piece, and a sealing space is formed in the silica gel frame 1;

when the battery is exploded and sprayed in the second stage and the third stage, the air pressure in the silica gel frame 1 is increased, the air pressure pushes the clamping layer 8 to move outwards, the elastic piece is compressed, and the exhaust insertion pipe 12 is separated from the protruding plug 4, so that the high-temperature and high-pressure gas in the battery is discharged outwards through the exhaust insertion pipe 12, and the direction of gas spraying can be controlled while the pressure is released;

it is worth mentioning that PET layer and the clamping layer 8 of upper and lower both sides can carry out the pressure release simultaneously to the explosion of battery both ends, avoid inside gas unable in time to discharge, but also can control the scope of default through setting up the elasticity size of elastic component, the elasticity of elastic component is less, the scope that inside atmospheric pressure reached the default will become less, can be favorable to carrying out the pressure release in advance when exploding like this, otherwise the elasticity of elastic component is great, the scope of default also can be corresponding great, can set up according to actual conditions.

The exhaust cannula 12 is preferably made of solid silica gel, and is as good as the protruding plug 4 in that the two can be conveniently inserted and pulled out, and the sealing performance is relatively better.

In one preferred embodiment, the elastic member comprises an elastic bag 9 fixed between the clamping layer 8 and the PET layer 2, the elastic bag 9 is filled with inert gas, a communication hole 10 communicated with the elastic bag 9 is formed in the outer wall of the clamping layer 8, a circular groove is formed in the inner wall of the communication hole 10, the diameter of the circular groove is larger than the inner diameter of the communication hole 10, a sealing ball 11 for sealing the communication hole 10 is arranged in the circular groove, and the circular groove of the clamping layer 8 is made of a material capable of elastically deforming.

When the secondary and tertiary batteries are exploded, high-temperature high-pressure gas is discharged along with flame injection, and compared with the high-temperature high-pressure gas, the injected flame is easier to influence and bring together effects on the shell of the battery and other batteries arranged around, so that the flame is eliminated or the time before the flame injection is prolonged, the combustion time of the battery can be pushed backwards, and the time is provided for the evacuation of passengers, and the safety is improved;

therefore, the elastic bag 9 is extruded and compressed by the clamping layer 8 under the action of air pressure, so that the air pressure in the elastic bag 9 is enhanced, the sealing ball 11 is extruded from the communication hole 10 by utilizing the action of the external extrusion of the air pressure in the elastic bag 9, so that the inert gas in the elastic bag 9 can be filled into the accommodating through groove and mixed with the air in the elastic bag to reduce the oxygen content in the internal air, and the inert gas can be discharged along with the pressure release of the high-temperature high-pressure gas, so that the effect of inhibiting the flame ejected from the accommodating through groove and the flame in the exhaust insertion pipe 12 is achieved, the flame ejection is reduced or even eliminated in the inert gas discharging and exhausting process, the purpose of delaying the combustion time of the battery is achieved, escape time is provided for passengers, and time is provided for subsequent rescue.

In one preferred embodiment, an inner rib 5 is disposed in the inner step 3, two ends of the inner rib 5 are respectively inserted into the protruding plugs 4 on the upper side and the lower side of the inner rib, a cavity groove 6 is formed in the inner step 3 located in the middle of the inner rib 5, and the cavity groove 6 can be used for bending the inner rib 5.

In one stage, the battery can press the inner wall of the containing through groove and one of the inner walls when heating and swelling, referring to fig. 4, the inner rib 5 is pushed to bend while pressing the inner wall, the inner rib 5 bends while driving the protruding plug 4 to perform certain bias in the exhaust insertion tube 12, thus being beneficial to the gap and looseness of the two, avoiding the adhesion phenomenon between the two in a long-time inserting state and being unable to separate at the first time under the action of air pressure, further ensuring that the high-temperature and high-pressure air can be decompressed at the first time and improving the safety performance

In one preferred embodiment, the surface of the inner step 3 located in the accommodating through groove is set as a first convex surface 7.

The first bulge surface 7 is arranged to play a role in limiting and fixing the battery, the battery is protected through good buffer effect, meanwhile, the battery can further play a role in extrusion and bending through the first bulge surface 7 when expanding in a swelling manner, and the first bulge surface 7 is arranged to reduce internal deformation and prolong the service life of the battery.

It should be noted that, in this case, the first protrusion surface 7 is disposed on the opposite inner wall of the through groove of the silica gel frame, and may also be disposed on the inner wall of the four surfaces, which is similar to the above protrusion plug 4 and the exhaust insertion tube 12, not only limited to two shown in the drawings, but also may be disposed in multiple groups to further increase the speed of venting and pressure relief.

In one preferred embodiment, the heat insulation layer 15 is attached to the inner wall of the through groove of the silica gel frame 1 and the inner walls of the two PET layers 2.

In one preferred embodiment, the insulating layer 15 is a pre-oxidized fiber aerogel.

The heat insulation layer 15 has the effects of heat insulation and high temperature resistance, and the pre-oxidized fiber aerogel has low heat conductivity coefficient and can play a good heat insulation role so as to reduce the heat conduction influence on adjacent batteries in the early stage of thermal runaway.

In one preferred embodiment, a surface of the clamping layer 8 facing the through groove of the silica gel frame 1 is set as a second convex surface 14.

Through setting up the second raised face 14 on the one hand can play fixed and cushioning effect to the battery, on the other hand because of its cambered surface's reason, can play certain guide effect to inside air current, guide it to exhaust intubate 12 department discharge pressure release, the cambered surface also can improve its compressive strength moreover, when the gas of high temperature high pressure directly strikes on the second raised face 14, can avoid it directly to break through clamping layer 8.

In one of the preferred embodiments, the insulating layer 15 on the PET layer 2 is attached to the outer wall of the clamping layer 8.

In one preferred embodiment, an interference fit is used between the vented cannula 12 and the protruding plug 4.

The sealing property of the two protruding plugs 4 can be ensured after the protruding plugs 4 are inserted into the exhaust insertion pipe 12 in an interference fit mode, and when the protruding plugs 4 are separated, the protruding plugs 4 can be separated under the interference fit, so that the exhaust insertion pipe 12 is heated and softened only when the exhaust insertion pipe is packaged, and the exhaust insertion pipe can be deformed to a certain extent and inserted on the protruding plugs 4.

In one of the preferred embodiments, the inner wall of the elastic bag 9 is provided with an inward fold.

Referring specifically to fig. 7, the provision of the bellows 9 facilitates compression of the bellows 9 when it is compressed by the gripping layer 8.

The standard components used in the present embodiment may be purchased directly from the market, and the nonstandard structural components according to the descriptions of the specification and the drawings may also be obtained directly by unambiguous processing according to the common general knowledge in the prior art, and meanwhile, the connection manner of each component adopts the conventional means mature in the prior art, and the machinery, the components and the equipment all adopt the conventional types in the prior art, so that the specific description will not be made here.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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. PET and silica gel frame packaging structure for power battery, including silica gel frame (1), silica gel frame (1) have the holding logical groove that the power supply was put into, its characterized in that still includes:

two PET layers (2) for closing outlets at the upper and lower ends of the silica gel frame (1) and forming a closed space inside;

and the exhaust component is arranged in the accommodating through groove of the silica gel frame (1), and when the air pressure in the accommodating through groove exceeds a preset value, the exhaust component enables air in the accommodating through groove to be exhausted from the direction perpendicular to the arrangement direction of the silica gel frame (1).

2. The PET and silicone frame packaging structure for a power battery according to claim 1, wherein: the exhaust assembly comprises an inner step (3) integrally formed on the inner wall of the accommodating through groove of the silica gel frame (1), and protruding plugs (4) are fixed on the upper side and the lower side of the inner step (3);

still including fixing clamping layer (8) at PET layer (2) outer wall, be equipped with the elastic component between clamping layer (8) and PET layer (2), clamping layer (8) correspond the position of protruding stopper (4) and are fixed with exhaust intubate (12), just protruding stopper (4) can insert in exhaust intubate (12) to seal exhaust intubate (12), the outer wall on PET layer (2) is opened and is supplied exhaust intubate (12) to insert and gliding exhaust hole (13).

3. The PET and silicone frame packaging structure for a power battery according to claim 2, wherein: the elastic piece is including fixing elastic bag (9) between clamping layer (8) and PET layer (2), just elastic bag (9) intussuseption is filled with inert gas, communication hole (10) with elastic bag (9) intercommunication are seted up to the outer wall of clamping layer (8), circular slot has been seted up to the inner wall of communication hole (10), and the diameter of circular slot is greater than the internal diameter of communication hole (10), be equipped with in the circular slot and be used for carrying out confined sealing ball (11) with communication hole (10), just the circular slot part of clamping layer (8) adopts the material preparation that can elastic deformation.

4. The PET and silicone frame packaging structure for a power battery according to claim 2, wherein: the inside of interior step (3) is equipped with interior muscle (5), just in protruding stopper (4) of its upper and lower both sides are inserted respectively at the both ends of interior muscle (5), cavity groove (6) have been seted up to the inside that interior step (3) are located interior muscle (5) intermediate position, just cavity groove (6) can supply interior muscle (5) to bend.

5. The PET and silicone frame packaging structure for a power battery according to claim 3, wherein: one surface of the inner step (3) positioned in the accommodating through groove is set to be a first bulge surface (7).

6. The PET and silicone frame packaging structure for a power battery according to any one of claims 1 to 5, wherein: the inner wall of the through groove of the silica gel frame (1) and the inner walls of the two PET layers (2) are respectively attached with a heat insulation layer (15).

7. The PET and silicone frame packaging structure for a power battery according to claim 6, wherein: the heat insulation layer (15) adopts pre-oxidized fiber aerogel.

8. The PET and silicone frame packaging structure for a power battery according to claim 3, wherein: one surface of the clamping layer (8) facing the inside of the accommodating through groove of the silica gel frame (1) is a second bulge surface (14).

9. The PET and silicone frame packaging structure for a power battery according to claim 6, wherein: the heat insulation layer (15) positioned on the PET layer (2) is attached to the outer wall of the clamping layer (8).

10. The PET and silicone frame packaging structure for a power battery according to claim 2, wherein: the exhaust cannula (12) is in interference fit with the protruding plug (4).

11. The PET and silicone frame packaging structure for a power battery according to claim 3, wherein: the inner wall of the elastic bag (9) is provided with an inward folding type.