CN217114553U - Heat insulation pad and battery pack - Google Patents
Heat insulation pad and battery pack Download PDFInfo
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- CN217114553U CN217114553U CN202220674994.5U CN202220674994U CN217114553U CN 217114553 U CN217114553 U CN 217114553U CN 202220674994 U CN202220674994 U CN 202220674994U CN 217114553 U CN217114553 U CN 217114553U
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- heat insulation
- heat insulating
- fire extinguishing
- mat
- heat
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Abstract
The utility model provides a heat insulating mattress and battery package, the utility model discloses a heat insulating mattress, including the insulating layer to and divide the planking of locating the insulating layer both sides, the insulating layer includes the heat insulating board that links to each other with two planking respectively, is equipped with the intercommunication chamber that link up its thickness direction on the heat insulating board, and coats on the chamber wall in intercommunication chamber and be equipped with the coating of putting out a fire. The utility model discloses a heat insulating mattress is through being equipped with the intercommunication chamber that link up its thickness direction on the heat insulating board to when making this heat insulating mattress have better thermal-insulated effect, can also reduce the weight of this heat insulating mattress, and cover through the wall in intercommunication chamber and be equipped with the fire extinguishing coating, can effectively extinguish the intensity of a fire that produces after the battery package thermal runaway, thereby promote this heat insulating mattress's comprehensive efficiency.
Description
Technical Field
The utility model relates to a power battery wraps technical field, in particular to heat insulating mattress. And simultaneously, the utility model discloses still relate to a battery package with this heat insulating mattress.
Background
At present, the research on thermal runaway of a power battery system mainly focuses on the aspect of thermal runaway safety problems caused by triggering of thermal runaway of a single battery cell and then spreading of the thermal runaway to a whole battery pack. When a certain single battery cell triggers thermal runaway, the heat generation quantity is suddenly increased, the heat dissipation quantity is far smaller than the heat generation quantity, so that the heat is transferred to the surrounding battery cells, the large-scale thermal runaway of the peripheral batteries can be rapidly caused, and potential safety hazards are formed. Or, thermal runaway of a single battery cell is a source of thermal runaway of the whole battery pack, and therefore, thermal protection between the battery cells is very important.
Thermal protection between electric cores mainly means that a heat insulation pad is arranged between the electric cores to block thermal runaway from propagating from an out-of-control single electric core to the surrounding electric cores, and damage and an incidental destructive effect of a battery pack are reduced. In the prior art, aerogel particles such as silicon dioxide and the like and fiber mats and other materials are often adopted to form a heat insulation pad in a composite mode, and the low heat conductivity coefficient (about 0.03W/m.K at room temperature) of the silica aerogel particles is utilized so as to block heat transfer between the battery core and the battery core. The existing heat insulation mat is usually configured as a solid structure so as to have certain structural strength and pressure resistance, thereby being capable of bearing the expansion force of the battery system in the use process.
However, the heat insulation mat is designed into a solid structure, which also results in a heavy weight of the heat insulation mat, thereby also increasing the weight of the battery system and affecting the improvement of the energy density of the battery system. In addition, the existing heat insulation pad has a single function, and most of the existing heat insulation pads only have a heat insulation function, when the battery is out of control due to thermal runaway to generate fire, the heat insulation pad cannot control the out of control fire, and the using effect of the heat insulation pad is poor.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a heat insulation pad, so as to reduce the weight of the heat insulation pad and extinguish the fire generated after the thermal runaway of the battery pack.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a heat insulation pad comprises a heat insulation layer and outer plates which are respectively arranged on two sides of the heat insulation layer;
the heat insulation layer comprises heat insulation plates respectively connected with the two outer plates, a communication cavity penetrating through the heat insulation plates in the thickness direction is arranged on each heat insulation plate, and a fire extinguishing coating is covered on the cavity wall of each communication cavity.
Furthermore, the fire extinguishing coating comprises a coating layer and fire extinguishing microspheres distributed in the coating layer, and fire extinguishing agents are wrapped in the fire extinguishing microspheres.
Further, the fire extinguishing agent adopts at least one of heptafluoropropane, pentafluoroethane, trifluoromethane, hexafluoropropane, trifluoroiodomethane and perfluorohexanone.
Further, the communication cavity is in a regular hexagonal prism shape, and the communication cavities are a plurality of communication cavities which are closely arranged; the heat insulation plate is in a honeycomb structure due to the fact that the communicating cavities are tightly arranged.
Further, the ratio of the length of each side of the communicating cavity to the thickness of the heat insulation plate is 3: 1.
further, the heat insulation layer is connected with the outer plate through an adhesive layer.
Furthermore, the adhesive layer is made of inorganic high-temperature-resistant adhesive.
Further, the outer plate is made of a ceramic fiber material or an aerogel material; and/or the heat insulation plate is made of ceramic fiber materials.
Further, the thickness of the outer plate is 0.2-1 mm; and/or the presence of a gas in the gas,
the thickness of the heat insulation plate is 1-2 mm.
Compared with the prior art, the utility model discloses following advantage has:
heat insulating mattress, through be equipped with the intercommunication chamber that link up its thickness direction on the heat insulating board to when making this heat insulating mattress have better thermal-insulated effect, can also reduce this heat insulating mattress's weight, and cover through the wall in intercommunication chamber and be equipped with the fire extinguishing coating, can effectively extinguish the conflagration that the battery package thermal runaway back produced, thereby promote this heat insulating mattress's comprehensive efficiency.
Another object of the present invention is to provide a battery pack, wherein the heat insulating pad is disposed in the battery pack.
The utility model discloses a battery package can promote the security performance of this battery package through setting up foretell heat insulating mattress, and then improves the battery package quality.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic view of an overall structure of a heat insulation mat according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a heat insulation board according to a first embodiment of the present invention.
Description of reference numerals:
1. an outer plate;
2. a heat insulation plate; 201. a communicating cavity;
3. and (4) fire extinguishing coating.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", "front", "rear", "left", "right", "top", "bottom" and the like appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.
In addition, in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically limited. For example, the connection may be fixed, detachable, or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example one
The utility model relates to a heat insulating mattress, overall structure is last, and it includes the insulating layer to and divide the planking 1 of locating the insulating layer both sides, wherein, the insulating layer includes the heat insulating board 2 that links to each other with two planking 1 respectively, and is equipped with the intercommunication chamber 201 that link up its thickness direction on the heat insulating board 2, and coats on the chamber wall in intercommunication chamber 201 and be equipped with fire extinguishing coating 3.
Based on the above general description, as shown in fig. 1 to fig. 2, in the present embodiment, preferably, the two outer plates 1 are respectively disposed on two sides of the thermal insulation layer, and form plugs at two ends of the communication cavity 201, and encapsulate air in the communication cavity 201, so that the thermal insulation has a good thermal insulation effect due to the low thermal conductivity of air. Further, since the communication chamber 201 is provided, the heat insulating mat can be made light in weight so as not to affect the increase in energy density of the battery pack.
The fire extinguishing coating 3 in the embodiment comprises a coating layer and fire extinguishing microspheres distributed in the coating layer, and fire extinguishing agents are wrapped in the fire extinguishing microspheres. Among them, the fire extinguishing agent is preferably at least one of heptafluoropropane, pentafluoroethane, trifluoromethane, hexafluoropropane, trifluoroiodomethane and perfluorohexanone, and for example, heptafluoropropane alone or pentafluoroethane alone may be used, and further, the fire extinguishing agent may be a mixture of two or more of the above materials, for example, heptafluoropropane and pentafluoroethane mixed to form the fire extinguishing agent, or trifluoromethane and hexafluoropropane mixed to form the fire extinguishing agent.
When the coating of putting out a fire 3 is paintd, only need guarantee will put out a fire microballon homogeneous mixing in coating, again with coating coat to the chamber wall of intercommunication chamber 201 on can, processing is convenient, when the coating of putting out a fire 3 meets the flame, put out a fire microballon 32 can be melted by the flame, its inside fire extinguishing agent can be released fast to reach the purpose of putting out a fire fast.
In the process of using the heat insulation pad, if thermal runaway occurs in the battery pack and fire is generated, the fire extinguishing microspheres can be broken at high temperature and release the fire extinguishing agent in the fire extinguishing microspheres, the fire extinguishing agent penetrates through the outer plates 1 on the two sides to enter the space in the battery pack and extinguish the flame in the battery pack, and therefore damage caused by the fire is reduced.
As shown in fig. 2, the communicating cavities 201 are in a regular hexagonal prism shape, and the communicating cavities 201 are closely arranged, so that the heat insulating board 2 forms a honeycomb structure due to the close arrangement of the communicating cavities 201. Be honeycomb structure through making heat insulating board 2, can make this heat insulating mattress have better structural strength, because the heat insulating mattress sets up between electric core and the electric core in the battery package usually, have better structural strength through making the heat insulating mattress, then can play the effect of supporting the resistance to compression, and under the battery package thermal runaway's the condition, make to have certain interval between electric core and the electric core, so that reduce the thermal transmission between electric core and the electric core, promote the heat-proof quality of heat insulating mattress when battery package thermal runaway.
In addition, in practical implementation, the side length of the communication cavity 201 can be specifically selected according to requirements in use, such as structural strength requirements, thermal insulation requirements and the like, but the ratio of the length of each side of the communication cavity 201 to the thickness of the thermal insulation board 2 is preferably 3: 1. By this arrangement, the insulating board 2 can have a better structural strength and an optimal insulating performance. Of course, setting the ratio of the length of each side of the communicating chamber 201 to the thickness of the heat insulating board 2 to 3:1 is only a preferred embodiment, and it may be set to other values such as 2:1, 4:1, 5:1, etc.
The heat-insulating layer and the outer plates 1 are preferably connected by adopting an adhesive layer, and the adhesive layer is preferably made of inorganic high-temperature-resistant adhesive (also called inorganic high-temperature adhesive, which is an important fine chemical product and has the advantages of strong adhesive force, fire resistance, high temperature resistance, good impact resistance, no toxicity and no volatilization of any substance), so that the heat-insulating layer and the two outer plates 1 still have a good connecting effect under the condition of thermal runaway of a battery pack.
The outer plate 1 can be made of ceramic fiber material or aerogel material, and the heat insulation plate 2 is made of ceramic fiber material. In this embodiment, the outer plate 1 and the heat insulation plate 2 are preferably made of ceramic fiber, and by this arrangement, the cost of the heat insulation pad can be reduced on the premise that the heat insulation pad has better structural strength and heat insulation performance. Further, by providing the outer panel 1, the surface strength and tensile strength of the heat insulating mat can be improved, and the heat insulating mat can insulate heat and maintain the shape and structure of the heat insulating mat when thermal runaway occurs in the battery pack.
In addition, in order to enable the heat insulation pad to have a good heat insulation effect and good structural strength, the thickness of the outer plate 1 is preferably 0.2-1 mm, and the specific value can be 0.2mm, 0.5mm, 0.8mm, 1mm and the like; the thickness of the heat insulation plate 2 is preferably 1-2 mm, and the specific value can be 1mm, 1.5mm, 1.8mm, 2mm and the like.
The heat insulating mattress of this embodiment is through being equipped with the intercommunication chamber 201 that link up its thickness direction on heat insulating board 2 to when making this heat insulating mattress have better thermal-insulated effect, can also reduce this heat insulating mattress's weight, and cover through the wall in intercommunication chamber 201 and be equipped with fire extinguishing coating 3, then can effectively extinguish the intensity of a fire that produces after the battery package thermal runaway, thereby promote this heat insulating mattress's comprehensive efficiency.
Example two
The present invention relates to a battery pack, in which the heat insulating pad according to the first embodiment is disposed. When the battery pack is specifically implemented, the heat insulation pad is clamped between every two electric cores in the battery pack, or the heat insulation pad is clamped between every two battery modules in the battery pack.
The battery pack of this embodiment can improve the thermal-insulated effect between electric core and the electric core or between battery module and the battery module in the battery pack through setting up the heat insulating mattress of embodiment one to can promote the security performance of this battery pack.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A heat insulating mat, characterized in that:
comprises a heat insulation layer and outer plates (1) respectively arranged at two sides of the heat insulation layer;
the heat insulation layer comprises heat insulation plates (2) connected with the two outer plates (1) respectively, a communication cavity (201) penetrating through the heat insulation plates in the thickness direction is formed in each heat insulation plate (2), and a fire extinguishing coating (3) is covered on the cavity wall of each communication cavity (201).
2. The insulation mat of claim 1, wherein:
the fire extinguishing coating (3) comprises a coating layer and fire extinguishing microspheres distributed in the coating layer, and fire extinguishing agents are wrapped in the fire extinguishing microspheres.
3. The insulation mat of claim 2, wherein:
the fire extinguishing agent is at least one of heptafluoropropane, pentafluoroethane, trifluoromethane, hexafluoropropane, trifluoroiodomethane and perfluorohexanone.
4. The insulation mat of claim 1, wherein:
the communication cavity (201) is in a regular hexagonal prism shape, and the communication cavities (201) are arranged in a compact manner;
the heat insulation plate (2) is in a honeycomb structure due to the fact that the communicating cavities (201) are closely arranged.
5. The insulation mat of claim 4, wherein:
the ratio of the length of each side of the communicating cavity (201) to the thickness of the heat insulation plate (2) is 3: 1.
6. the insulation mat of claim 1, wherein:
the heat insulation layer is connected with the outer plate (1) through an adhesive layer.
7. The insulation mat of claim 6, wherein:
the adhesive layer is made of inorganic high-temperature-resistant adhesive.
8. A heat insulating mat according to any of claims 1 to 7, wherein:
the outer plate (1) is made of a ceramic fiber material or an aerogel material; and/or the presence of a gas in the atmosphere,
the heat insulation plate (2) is made of ceramic fiber materials.
9. The insulation mat of claim 8, wherein:
the thickness of the outer plate (1) is 0.2-1 mm; and/or the presence of a gas in the gas,
the thickness of the heat insulation plate (2) is 1-2 mm.
10. A battery pack, comprising: the battery pack is provided with an insulation mat as claimed in any one of claims 1 to 9 therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220674994.5U CN217114553U (en) | 2022-03-24 | 2022-03-24 | Heat insulation pad and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220674994.5U CN217114553U (en) | 2022-03-24 | 2022-03-24 | Heat insulation pad and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217114553U true CN217114553U (en) | 2022-08-02 |
Family
ID=82604976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220674994.5U Active CN217114553U (en) | 2022-03-24 | 2022-03-24 | Heat insulation pad and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217114553U (en) |
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2022
- 2022-03-24 CN CN202220674994.5U patent/CN217114553U/en active Active
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