CN210733453U - Heat insulation sheet for new energy automobile battery pack - Google Patents

Abstract

The utility model belongs to the technical field of heat insulation and flame retardant for battery packs of new energy vehicles, and discloses a heat insulation sheet for battery packs of new energy vehicles. It includes a first aerogel felt layer, a second aerogel felt layer, a rigid foam layer and an encapsulation layer, and the first aerogel felt layer, the second aerogel felt layer, the rigid foam layer and the encapsulation layer. All are square and the center lines of the four length directions are in the same vertical plane, the first aerogel felt layer, the second aerogel felt layer, and the rigid foam layer are built into the encapsulation layer, and the rigid foam layer is located in the first aerogel felt layer. An aerogel felt layer and a second aerogel felt layer are in the middle. The heat-insulating sheet of the utility model has good heat-insulating and heat-preserving properties, and at the same time can well fix the aerogel felt.

Description

A kind of heat insulation sheet for new energy vehicle battery pack

technical field

The utility model belongs to the technical field of heat insulation and flame retardant for battery packs of new energy vehicles, in particular to a heat insulating sheet for battery packs of new energy vehicles.

Background technique

China's new energy vehicle industry began in the early 21st century. In 2001, the new energy vehicle research project was included in the "863" major scientific and technological topics during the national "Tenth Five-Year Plan" period, and a strategy of starting from gasoline vehicles and advancing towards the goal of hydrogen-powered vehicles was planned. Since the "Eleventh Five-Year Plan", my country has put forward the strategy of "energy saving and new energy vehicles", and the government has paid great attention to the research and development and industrialization of new energy vehicles, forming a complete layout of research and development and demonstration of new energy vehicles. New energy vehicles refer to all other energy vehicles except gasoline and diesel engines. Including fuel cell vehicles, hybrid vehicles, hydrogen energy vehicles and solar vehicles, etc., their exhaust emissions are relatively low.

Since new energy vehicles meet the environmental protection requirements vigorously advocated by the state, their sales have increased year by year, and their application scope has become larger and larger. At present, most of the new energy vehicles sold in the Chinese market are hybrid vehicles and pure electric vehicles. Its power sources mainly include lithium-ion batteries, nickel-hydrogen batteries, fuel cells, lead-acid batteries, and supercapacitors. Due to the large amount of power required for driving, new energy vehicles powered by electricity need to provide a large current from the battery compartment for a long time to ensure the supply of power in order to ensure normal driving. When the on-board battery outputs electrical energy for a long time, the chemical reaction in the battery for a long time will cause the battery body to heat up significantly, and there is a risk of burning and explosion. The traditional core modules use plastic separators to separate the batteries from each other, which is of no practical use. This is not only heavy but also unable to play a protective role, and it is easy to cause problems such as dissolution of the separators and fire due to the high temperature of the battery. The existing protective felt has a simple structure and is easily deformed, so that it cannot fully contact the battery pack well, and when the battery is seriously heated, it cannot provide a good heat insulation effect. Therefore, how to achieve thermal insulation and flame retardant in the field of new energy vehicles is the primary consideration for the long-term development of new energy.

Utility model content

Aiming at the problem that the current aerogel protective felt for the power battery system of the new energy vehicle is soft and easy to deform, the battery pack generates serious heat in a high temperature environment and severe vibration, and the aerogel cannot play a good heat insulation effect. The purpose is to provide a heat insulation sheet for a battery pack of a new energy vehicle.

To achieve the above object, the technical scheme adopted by the present utility model is as follows:

A heat insulation sheet for a battery pack of a new energy vehicle, comprising a first aerogel felt layer, a second aerogel felt layer, a rigid foam layer and an encapsulation layer, a first aerogel felt layer, a second aerogel felt layer The felt layer, the rigid foam layer and the encapsulation layer are all square and the centerlines in the length direction of the four are in the same vertical plane. The first aerogel felt layer, the second aerogel felt layer, and the rigid foam layer Built within the encapsulation layer and the rigid foam layer is intermediate the first aerogel felt layer and the second aerogel felt layer.

Preferably, the first aerogel felt layer, the second aerogel felt layer, and the rigid foam layer are pasted or integrally formed with an adhesive. The adhesive is one of organic adhesives such as epoxy resin adhesive, polyurethane adhesive, optical epoxy adhesive, saturated polyester adhesive, and polyvinyl acetal adhesive. The integral molding refers to forming the rigid foam layer between the first aerogel felt layer and the second aerogel felt layer through foaming technology, specifically: coating the foaming raw material system of the rigid foam layer respectively On one side of the first aerogel felt layer and the second aerogel felt layer, the coating surfaces of the first aerogel felt layer and the second aerogel felt layer are superimposed and bonded to form foaming; foaming The molding pressure is 0.5-1 Mpa, the temperature is 100-110 °C, and the time is 8-12 min.

Preferably, the length and width of the first aerogel felt layer, the second aerogel felt layer and the rigid foam layer are the same.

Preferably, the thicknesses of the first aerogel felt layer and the second aerogel felt layer are both 1-3 mm.

Preferably, the first aerogel felt layer and the second aerogel felt layer are both silica aerogel felts.

Preferably, the rigid foam layer is a polyurethane foam layer, a polyethylene foam layer or a polyacrylic foam layer.

Preferably, the encapsulation layer is a PET film or a polyethyleneimine film.

Beneficial effects: The thermal insulation sheet of the utility model adopts the first aerogel felt layer, the second aerogel felt layer and the rigid foam layer. The aerogel felt has good thermal insulation properties, but it has certain flexibility , the displacement during use will have a great impact on the thermal insulation performance. The utility model is provided with a layer of rigid foam between the first aerogel felt layer and the second aerogel felt layer. The foam has a porous structure and has good thermal insulation properties, which can well fix the aerogel felt and further increase the thermal insulation effect; The existing laminated thermal insulation felt has poor sealing performance, easily causes fuel leakage, and affects the thermal insulation effect. The thermal insulation sheet of the utility model can greatly improve the safety guarantee of the new energy industry and expand the application of new energy vehicles. scope.

Description of drawings

Fig. 1: the front view of the present utility model;

In the figure: 11-first aerogel felt layer, 12-second aerogel felt layer, 2-hard foam layer, 3-encapsulation layer.

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

Example 1

As shown in FIG. 1, a heat insulation sheet for a battery pack of a new energy vehicle includes a first aerogel felt layer 11, a second aerogel felt layer 12, a rigid foam layer 2 and an encapsulation layer 3. The gel felt layer 11 , the second aerogel felt layer 12 , the rigid foam layer 2 and the encapsulation layer 3 are all rectangular and their lengthwise centerlines are in the same vertical plane. The length and width of the layer 11, the second aerogel felt layer 12 and the rigid foam layer 2 are all the same, the thickness of the first aerogel felt layer 11 and the second aerogel felt layer 12 are all 1 mm, the first Aerogel felt layer 11, second aerogel felt layer 12, rigid foam layer 2 are built into encapsulation layer 3 and rigid foam layer 2 is located in first aerogel felt layer 11 and second aerogel felt layer 12 middle; wherein, the first aerogel felt layer 11, the second aerogel felt layer 12, and the rigid foam layer 2 are pasted together by polyurethane glue, and the first aerogel felt layer 11 The second aerogel felt layer 12 is a silica aerogel felt, the rigid foam layer 2 is a polyurethane foam layer, and the encapsulation layer 3 is a PET film.

When in use, the thermal insulation sheet of the present invention is directly fixed in the middle of two rows of battery packs. The first aerogel felt layer 11 and the second aerogel felt layer 12 have good thermal insulation properties, and the first aerogel felt layer 12 has good thermal insulation properties. The rigid foam layer 2 disposed between the felt layer 11 and the second aerogel felt layer 12 has a porous structure and good thermal insulation properties, which can well protect the first aerogel felt layer 11 and the second aerogel felt layer 12. The second aerogel felt layer 12 plays a fixing role and further increases the thermal insulation effect.

Claims (7)

1. The utility model provides a new energy automobile is heat insulating sheet for group battery which characterized in that: including first aerogel felt layer, second aerogel felt layer, rigid foam layer and encapsulation layer, first aerogel felt layer, second aerogel felt layer, rigid foam layer and encapsulation layer four are square and the length direction central line of four is in same vertical plane, and first aerogel felt layer, second aerogel felt layer, rigid foam layer are arranged in the encapsulation layer and the rigid foam layer is located in the middle of first aerogel felt layer and the second aerogel felt layer.

2. The heat insulating sheet for a new energy vehicle battery pack according to claim 1, characterized in that: the first aerogel felt layer, the second aerogel felt layer and the rigid foam layer are adhered or integrally formed through adhesives.

3. The heat insulating sheet for a new energy vehicle battery pack according to claim 1, characterized in that: the first aerogel felt layer, the second aerogel felt layer and the rigid foam layer are all the same in length and width.

4. The heat insulating sheet for a new energy vehicle battery pack according to claim 3, characterized in that: the thickness of the first aerogel felt layer and the second aerogel felt layer is 1-3 mm.

5. The heat insulation sheet for the new energy automobile battery pack according to any one of claims 1 to 4, characterized in that: the first aerogel felt layer and the second aerogel felt layer are both silica aerogel felts.

6. The heat insulation sheet for the new energy automobile battery pack according to any one of claims 1 to 4, characterized in that: the rigid foam layer is a polyurethane foam layer, a polyethylene foam layer or a polyacrylic acid foam layer.

7. The heat insulation sheet for the new energy automobile battery pack according to any one of claims 1 to 4, characterized in that: the packaging layer is a PET film or a polyethyleneimine film.

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