Flame-retardant and heat-insulating ceramic pad and electrochemical energy storage device

Abstract

The utility model provides a flame-retardant and heat-insulating ceramic pad, which is used for an electrochemical energy storage device and is characterized by sequentially comprising a flame-retardant adhesive layer with double-sided adhesion performance, a heat-insulating layer and a flame-retardant coating layer from top to bottom, the flame-retardant coating layer is arranged on the upper surface or the lower surface of the heat insulation layer, and the flame-retardant adhesive layers are respectively arranged on the upper surface of the heat insulation layer and the lower surface of the flame-retardant coating layer; a plurality of openings are formed in the flame-retardant coating layer; and the opening is communicated with the heat insulation layer. The flame-retardant and heat-insulating ceramic pad has both flame retardance and heat insulation, meets the flame-retardant and heat-insulating requirements of an electrochemical energy storage battery, and solves the technical problems of poor flame-retardant effect, no heat-insulating effect and poor safety performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of flame-retardant and fire-proof products, and particularly relates to a flame-retardant and heat-insulating ceramic pad. Background Art

[0002] The existing electrochemical energy storage device is composed of multiple battery cell modules, and each module is composed of several to more than a dozen battery cells. In order to achieve the thermal protection of the electrochemical energy storage device, there are insulating and flame-retardant components between each battery cell and each module. When the battery undergoes "thermal runaway", the insulating and flame-retardant components can isolate the heat source and prevent the high temperature inside the module from spreading. Therefore, the performance of the insulating and flame-retardant components is crucial for the safety of new energy battery packs. However, the commonly used insulating and flame-retardant components at present are prepared from foamed silica gel, polyurethane, etc., and various modified or composite materials formed by their combinations. When in use, their flame-retardant performance is poor, and they are easy to burn through, making it difficult to isolate and block the high-temperature heat of the battery cells under thermal runaway. There are technical problems such as poor flame-retardant effect, lack of heat-insulating effect, and poor safety performance. Summary of the Invention

[0003] In view of this, the purpose of the utility model is to avoid the deficiencies in the prior art and provide a flame-retardant and heat-insulating ceramic pad, which can take into account both flame retardancy and heat insulation, meet the requirements of flame retardancy and heat insulation for electrochemical energy storage batteries, and solve the technical problems of poor flame-retardant effect, lack of heat-insulating effect, and poor safety performance.

[0004] This embodiment provides a flame-retardant and heat-insulating ceramic pad for an electrochemical energy storage device, which is characterized in that: it sequentially includes a flame-retardant adhesive layer with double-sided adhesion performance, a heat-insulating layer, and a flame-retardant coating layer from top to bottom; the flame-retardant coating layer is arranged on the upper surface or the lower surface of the heat-insulating layer, and the flame-retardant adhesive layer is respectively arranged on the upper surface of the heat-insulating layer and the lower surface of the flame-retardant coating layer; a plurality of openings are provided on the flame-retardant coating layer; and the openings are communicated with the heat-insulating layer.

[0005] Further, the flame-retardant adhesive layer includes a first flame-retardant adhesive layer and a second flame-retardant adhesive layer; the first flame-retardant adhesive layer is arranged on the upper surface of the heat-insulating layer, and the openings are opened on the lower surface of the first flame-retardant adhesive layer; the second flame-retardant adhesive layer is arranged on the surface of the flame-retardant coating layer.

[0006] Further, the transverse cross-section of the opening is set in one or more of the shapes of a rectangle, a circle, a triangle, a polygon, or an ellipse; and the number of the openings is not less than 3.

[0007] Further, a plurality of the openings are arrayed on the upper surface of the first flame-retardant adhesive layer at intervals, and the openings extend inward along the edge of the flame-retardant adhesive layer.

[0008] Further, a plurality of the openings are arranged in an array on the upper surface of the first flame-retardant adhesive layer at intervals, and a certain distance is provided between any one of the openings and the edge of the flame-retardant adhesive layer.

[0009] Further, the thickness of the flame-retardant adhesive layer is 0.05 - 0.30 mm.

[0010] Further, the heat insulation layer is made of one or more of aluminosilicate ceramic fiber, slag fiber cotton, and rock wool fiber, and is a layered structure with an outer contour adapted to the flame-retardant adhesive layer.

[0011] Further, the thickness of the heat insulation layer is 0.3 - 20 mm.

[0012] Further, the thickness of the flame-retardant coating layer is 0.05 mm - 5 mm.

[0013] The flame-retardant adhesive layer can be a layered component made of one or more of cotton paper, non-woven fabric substrate, and high-temperature PET substrate.

[0014] This embodiment also provides an electrochemical energy storage device, including a plurality of chemical battery packs and the flame-retardant and heat-insulating ceramic pad according to any one of the above, and the flame-retardant and heat-insulating ceramic pad is arranged between two adjacent chemical battery packs through the flame-retardant adhesive layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The flame-retardant and heat-insulating ceramic pad provided by the present utility model, through the combined use of the flame-retardant adhesive layer, heat insulation layer, and flame-retardant coating layer with double-sided adhesion performance, enables the combined ceramic pad to take into account both heat insulation and flame retardancy, meets the requirements of flame retardancy and heat insulation for electrochemical energy storage batteries, and solves the technical problems of poor flame retardant effect, lack of heat insulation effect, and poor safety performance; at the same time, it is combined with the openings provided in the flame-retardant adhesive layer; not only can the amount of flame-retardant adhesive be reduced, the use cost be reduced, but also the contact area between the flame-retardant adhesive layer and the chemical battery pack can be reduced, thus facilitating the subsequent repair and disassembly of the flame-retardant and heat-insulating ceramic pad. More importantly, the openings in the flame-retardant adhesive layer provide a heat insulation space, so as to provide additional expansion space for the flame-retardant coating layer during thermal runaway, achieving a better heat insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the following drawings without creative efforts.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the flame-retardant and heat-insulating ceramic pad in the present utility model.

[0018] Figure 2It is a sectional view of the flame-retardant and heat-insulating ceramic pad in the present utility model.

[0019] Figure 3 It is a perspective view of the first flame-retardant adhesive layer in Embodiment 1 of the present utility model.

[0020] Figure 4 It is a top view of the first flame-retardant adhesive layer in Embodiment 1 of the present utility model.

[0021] Figure 5 It is a top view of the first flame-retardant adhesive layer in Embodiment 2 of the present utility model.

[0022] Figure 6 It is a top view of the first flame-retardant adhesive layer in Embodiment 3 of the present utility model.

[0023] Figure 7 It is a sectional view of the electrochemical energy storage device in the present utility model

[0024] The figure includes: a flame-retardant adhesive layer 1, a first flame-retardant adhesive layer 11, a second flame-retardant adhesive layer 12, a heat-insulating layer 2, a flame-retardant coating layer 3, an opening 4, and a chemical battery pack 5. Detailed implementation manners

[0025] The present invention will be further described in conjunction with the following embodiments.

[0026] The following further details the specific implementation manners of the present invention in conjunction with the accompanying drawings, so that the technical solutions of the present invention are easier to understand and master.

[0027] In this embodiment, it should be understood that the orientation or positional relationships indicated by terms such as "middle", "upper", "lower", "top", "right side", "end", "front", "back", "middle part", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] In addition, in this specific implementation manner, if the connection or fixing manner between components is not specifically described, the connection or fixing manner can be bolt fixing or pin fixing commonly used in the prior art, or pin shaft connection, etc. Therefore, it will not be elaborated in this embodiment.

[0029] Embodiment 1

[0030] Such as Figures 1-4As shown in the figure; this embodiment provides a flame-retardant and heat-insulating ceramic pad for an electrochemical energy storage device, which sequentially includes a flame-retardant adhesive layer 1 with double-sided adhesion performance, a heat-insulating layer 2, and a flame-retardant coating layer 3 from top to bottom; the flame-retardant coating layer 3 is disposed on the lower surface of the heat-insulating layer 2, and the flame-retardant adhesive layer 1 is bonded to the upper surface of the heat-insulating layer 2 and the lower surface of the flame-retardant coating layer 3; a plurality of openings 4 are provided on the flame-retardant coating layer 1; and the openings 4 communicate with the heat-insulating layer 2.

[0031] The flame-retardant and heat-insulating ceramic pad provided by the present utility model, through the combined use of the flame-retardant adhesive layer 1, the heat-insulating layer 2, and the flame-retardant coating layer 3 with double-sided adhesion performance; enables the combined ceramic pad to simultaneously take into account heat insulation and flame retardancy, meet the requirements of flame retardancy and heat insulation for electrochemical energy storage batteries, and solve the technical problems of poor flame retardant effect, lack of heat insulation effect, and poor safety performance; at the same time, in cooperation with the openings 4 provided on the edge of the flame-retardant adhesive layer 1; not only can the amount of the flame-retardant adhesive layer 1 be reduced, the use cost be reduced, but also the contact area between the flame-retardant adhesive layer 1 and the chemical battery pack 5 can be reduced, thereby facilitating the subsequent disassembly of the flame-retardant and heat-insulating ceramic pad. More importantly, it provides a heat-insulating space to provide additional expansion space for the flame-retardant coating layer during thermal runaway, achieving a better heat-insulating effect.

[0032] In a preferred embodiment, the flame-retardant adhesive layer 1 includes a first flame-retardant adhesive layer 11 and a second flame-retardant adhesive layer 12; the first flame-retardant adhesive layer 11 is disposed on the upper surface of the heat-insulating layer 2, and the openings 4 are provided on the surface of the first flame-retardant adhesive layer 11; the second flame-retardant adhesive layer 12 is disposed on the lower surface of the flame-retardant coating layer 3.

[0033] In a preferred embodiment, the transverse cross-section of the opening 4 is set in one or more of the shapes of a rectangle, a circle, a triangle, a polygon, or an ellipse; the number of the openings 4 is not less than 3.

[0034] The opening 4 extends inward along the edge of the flame-retardant adhesive layer 1.

[0035] Specifically, the length of the entire flame-retardant and heat-insulating ceramic pad is 205 mm, and the width is 173 mm. The opening 4 on the surface of the first flame-retardant adhesive layer 1 is rectangular, the length of the opening 4 is 143 mm; the width of the opening 4 is 28 mm, and the number of the openings 4 is 3, as shown in the attached Figure 3 and the attached Figure 4 figure.

[0036] In a preferred embodiment, the flame-retardant adhesive layer 1 is a layered member made of one or more of cotton paper, non-woven fabric substrate, and high-temperature PET substrate; the thickness of the flame-retardant adhesive layer 1 is 0.05 - 0.20 mm.

[0037] Specifically, the flame-retardant adhesive layer 1 is a cotton paper-based flame-retardant double-sided adhesive with a thickness of 0.1 mm.

[0038] In a preferred embodiment, the heat insulation layer 2 is made of one or more materials selected from aluminum silicate ceramic fiber, slag fiber cotton and rock wool fiber, and has a layered structure with an outer contour adapted to the flame retardant adhesive layer 1; the thickness of the heat insulation layer 2 is 0.3 - 20 mm.

[0039] Specifically, the heat insulation layer 2 is made of aluminum silicate ceramic fiber and has a thickness of 1 mm.

[0040] In a preferred embodiment, the thickness of the flame retardant coating layer 3 is 0.05 mm - 5 mm.

[0041] Specifically, the flame retardant coating layer 3 can be obtained by using an intumescent inorganic fire - resistant coating disclosed in CN103627266A. 100 parts of ammonium polyphosphate, 120 parts of aluminum hydroxide, and 3 parts of borax are added to 25 parts of water and stirred to obtain a suspension. Then, 10 parts of organic auxiliary agent tris(2 - chloroethyl) phosphate, 20 parts of dipentaerythritol are added, and after stirring evenly, 8 parts of melamine, 8 parts of chlorinated terphenyl, 15 parts of talcum powder, and 15 parts of dicyandiamide are added. After stirring, finally 20 parts of phosphoric acid are added to obtain an intumescent coating. It is coated on an aluminum silicate ceramic fiber paper to make the coating thickness 1 mm.

[0042] Example 2

[0043] As Figures 1-5 shown; compared with Example 1 of the present utility model, the differences are as follows:

[0044] The flame retardant adhesive layer 1 in this example is a flame retardant double - sided adhesive with a non - woven fabric substrate and a thickness of 0.25 mm.

[0045] The heat insulation layer 2 is made of slag fiber cotton and has a thickness of 1 mm.

[0046] The flame retardant coating layer 3 can be directly obtained by using an intumescent inorganic fire - resistant coating of the public patent (CN103627266A), and its thickness is 0.5 mm.

[0047] A certain distance is provided between the opening 4 and the edge of the flame retardant adhesive layer 1.

[0048] The length of the entire flame retardant and heat - insulating ceramic pad is 205 mm, and the width is 173 mm. The opening 4 on the surface of the first flame retardant adhesive layer 1 is rectangularly arranged, the height of the opening 4 is 60 mm; the width of the opening 4 is 30 mm, and the number of openings 4 is 4. As shown in the appendix Figure 5 shown, the 4 rectangular openings are located inside the first flame retardant adhesive layer and are evenly spaced.

[0049] In this embodiment, a flame-retardant adhesive layer 1 made of a specific 0.25-mm non-woven fabric substrate, a 1-mm slag fiber cotton heat-insulating layer 2, and a 0.5-mm flame-retardant coating layer 3 are combined to form a flame-retardant and heat-insulating ceramic pad with excellent physical properties, good thermal stability, stable chemical properties, and excellent heat-insulating performance. At the same time, it has high flexibility, high tear resistance, and heat insulation. The openings inside the flame-retardant adhesive layer can save materials, facilitate repair and disassembly, and leave more heat-insulating space to provide additional expansion space for the flame-retardant coating layer in case of thermal runaway.

[0050] Example 3

[0051] As Figures 1-6 shown; compared with Example 1 of the present utility model, the difference lies in:

[0052] The flame-retardant adhesive layer 1 is a flame-retardant double-sided adhesive made of a high-temperature-resistant PET substrate with a thickness of 0.15 mm.

[0053] The ceramic fiber cotton heat-insulating layer 2 is made of rock wool fiber and has a thickness of 2 mm.

[0054] The flame-retardant coating layer 3 can be directly obtained from an intumescent inorganic fireproof coating of a publicly disclosed patent (CN103627266A) with a thickness of 0.5 mm.

[0055] A certain distance is provided between the opening 4 and the edge of the flame-retardant adhesive layer 1.

[0056] The entire flame-retardant and heat-insulating ceramic pad has a length of 240 mm and a width of 180 mm. The openings 4 on the surface of the first flame-retardant adhesive layer 1 are circularly arranged, the diameter of the circular opening is 40 mm, and the number of openings is 8, which are located inside the first flame-retardant adhesive layer and are arranged in two parallel rows at equal intervals, as shown in the appendix Figure 6 shown.

[0057] In this embodiment, a flame-retardant adhesive layer 1 made of a specific 0.15-mm high-temperature-resistant PET substrate, a 2-mm rock wool fiber heat-insulating layer 2, and a 0.5-mm flame-retardant coating layer 3 are combined to form a flame-retardant and heat-insulating ceramic pad with excellent physical properties, good thermal stability, stable chemical properties, and excellent heat-insulating performance. At the same time, it has high flexibility, high tear resistance, and heat insulation. The openings inside the flame-retardant adhesive layer can save materials, facilitate repair and disassembly, and leave more heat-insulating space to provide additional expansion space for the flame-retardant coating layer in case of thermal runaway.

[0058] Example 4

[0059] As Figure 7As shown; this embodiment also provides an electrochemical energy storage device, which includes a plurality of chemical battery packs 5 and the flame-retardant and heat-insulating ceramic pad described in any one of the above. The flame-retardant and heat-insulating ceramic pad is disposed between two adjacent chemical battery packs 5 through a flame-retardant adhesive layer 1.

[0060] During use, the flame-retardant and heat-insulating ceramic pad is wrapped around the outer surface of the chemical battery pack 5. Through the combined use of the flame-retardant adhesive layer 1, the heat-insulating layer 2, and the flame-retardant coating layer 3, the ceramic pad has flame-retardant and heat-insulating properties; at the same time, in combination with the adhesion performance of the surface of the flame-retardant adhesive layer 1, it can also effectively improve the connection firmness between the ceramic pad and the battery, facilitating the installation between the ceramic pad and the battery; when the chemical battery pack 5 experiences thermal runaway, the flame-retardant adhesive layer 1, the heat-insulating layer 2, and the flame-retardant coating layer 3 will effectively block the heat, playing a good role in fire prevention, flame retardancy, and heat insulation. At the same time, in combination with the opening 4 provided on the edge of the flame-retardant adhesive layer 1; it can not only reduce the usage amount of the flame-retardant adhesive layer 1, reduce the usage cost, but also reduce the contact area between the flame-retardant adhesive layer 1 and the chemical battery pack 5, thereby facilitating the subsequent disassembly of the flame-retardant and heat-insulating ceramic pad.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A flame-retardant and heat-insulating ceramic pad for an electrochemical energy storage device, characterized in that: From top to bottom, it successively includes a flame-retardant adhesive layer with double-sided adhesion performance, a heat insulation layer, and a flame-retardant coating layer; the flame-retardant coating layer is disposed on the upper surface or the lower surface of the heat insulation layer, and the flame-retardant adhesive layer is respectively disposed on the upper surface of the heat insulation layer and the lower surface of the flame-retardant coating layer; a plurality of openings are provided on the flame-retardant coating layer; and the openings communicate with the heat insulation layer.

2. The flame-retardant and heat-insulating ceramic pad according to claim 1, wherein: The flame-retardant adhesive layer includes a first flame-retardant adhesive layer and a second flame-retardant adhesive layer; the first flame-retardant adhesive layer is disposed on the upper surface of the heat insulation layer, and the openings are formed on the surface of the first flame-retardant adhesive layer; the second flame-retardant adhesive layer is disposed on the lower surface of the flame-retardant coating layer.

3. The flame-retardant and heat-insulating ceramic pad according to claim 2, wherein: The plurality of openings are arrayed on the upper surface of the first flame-retardant adhesive layer at intervals, and the openings extend inward along the edge of the flame-retardant adhesive layer.

4. The flame-retardant and heat-insulating ceramic pad according to claim 2, wherein: The plurality of openings are arrayed on the upper surface of the first flame-retardant adhesive layer at intervals, and a certain distance is provided between any one of the openings and the edge of the flame-retardant adhesive layer.

5. The flame-retardant and heat-insulating ceramic pad according to claim 3 or 4, characterized in that: The transverse cross-section of the opening is provided in one or more of the shapes of a rectangle, a circle, a triangle, or an ellipse; the number of the openings is not less than three.

6. The flame-retardant and heat-insulating ceramic pad according to claim 5, wherein: The thickness of the flame-retardant adhesive layer is 0.05 - 0.30 mm.

7. The flame-retardant and heat-insulating ceramic pad according to claim 1, wherein: The heat insulation layer is a layered structure with an outer contour adapted to the flame-retardant adhesive layer.

8. The flame-retardant and heat-insulating ceramic pad according to claim 1 or 7, wherein: The thickness of the heat insulation layer is 0.3 - 20 mm.

9. The flame-retardant and heat-insulating ceramic pad according to claim 1, wherein: The thickness of the flame-retardant coating layer is 0.05 mm - 5 mm.

10. An electrochemical energy storage device, characterized in that: It includes a plurality of chemical battery packs and the flame-retardant and heat-insulating ceramic pad according to any one of claims 1 - 9, and the flame-retardant and heat-insulating ceramic pad is disposed between two adjacent chemical battery packs through the flame-retardant adhesive layer.

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