Heat insulation sheet for new energy battery

Abstract

The utility model provides a heat insulation sheet for a new energy battery. The heat insulation sheet comprises a heat insulation layer, a bonding layer and a core material structural plate, the heat insulation layers are mounted on at least one pair of opposite surfaces of the core material structural plate through the bonding layers; the core material structural plate is a composite plate formed by stacking compressed or vacuumized inorganic powder or organic fibers; the thickness of the heat insulation layer is 0.05-5 mm, and the heat insulation layer is a mica sheet plate. The mounting plate provided by the utility model has the characteristics of no pollution, insulation and good heat resistance and voltage resistance, can be used for a battery heat insulation sheet, and has good heat insulation performance.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermal insulation, energy saving and environmental protection materials, and in particular relates to a heat insulation sheet for new energy batteries. Background Technology

[0002] Currently, the capacity of new energy batteries decreases significantly in low-temperature environments, and the charging speed slows down. In high-temperature environments, the battery life is shortened, posing safety hazards. Data shows that when the outdoor temperature is -7°C and the vehicle interior temperature is kept at 22°C, the average driving range of new energy vehicles will decrease by 39%, and the driving range of some vehicles without battery temperature control systems will decrease by up to 60%.

[0003] For example, a certain electric vehicle is equipped with a range calculator that can clearly demonstrate the impact of temperature changes on the range performance of electric vehicles. Taking one electric vehicle as an example, its range is 520 kilometers under normal temperature conditions, but under low temperature conditions, the range can only reach 328 kilometers, a direct drop of 36.9%, which is lower than the average level of all tested vehicles.

[0004] Therefore, the range of new energy vehicles is highly correlated with the ambient temperature. Generally, the optimal operating temperature for lithium-ion batteries is around 20 degrees Celsius. If the temperature of the battery cell drops excessively due to external cooling, it will lead to reduced activity of the positive electrode material, a decrease in the number of lithium ions moving within the cell, poorer diffusion of charged ions in the positive and negative electrode materials, slower energy transfer, and impaired ion movement, resulting in decreased battery charging and discharging performance. Low temperatures not only affect charging and discharging efficiency but can also cause lithium dendrite formation due to low-temperature lithium plating, impacting battery cycle life and potentially leading to premature battery failure. The discharge curves at extremely low temperatures of -30 degrees Celsius and ultra-low temperatures of -20 degrees Celsius are very steep. At -30 degrees Celsius, only about 20-60% of the SoC (System of Cells) is usable, and at -20 degrees Celsius, only about 15-80% of the SoC is usable, demonstrating the significant voltage fluctuations.

[0005] Because batteries generate heat through charging and discharging, they can maintain their power output by their own heat after operating for several hours in non-extreme low-temperature environments. However, during a cold start, the battery cannot withstand the effects of low temperatures by its own heat, necessitating the design of insulation measures.

[0006] The application of heat shields in new energy batteries mainly involves battery encapsulation and insulation materials, whose performance stability has a significant impact on battery safety. However, to ensure strength, most existing battery heat shield processes use pressure film sealing, which is costly and has complex operating requirements. The above-mentioned process effectively reduces the complexity of the operating process, but due to the complexity of the operating process, the yield is relatively low. Summary of the Invention

[0007] Technical Solution: To solve the above-mentioned technical problems, this utility model provides a heat insulation sheet for new energy batteries, which overcomes the technical problems of conventional product wrapping or protection using adhesive fiber cloth or aluminum foil, which is inconvenient to operate and easily damaged. The specific technical content is as follows:

[0008] It includes a heat insulation layer, an adhesive layer, and a core material structural board; the heat insulation layer is installed on at least one pair of opposite surfaces of the core material structural board through the adhesive layer, and the size of the heat insulation layer is the same as the size of the core material structural board at the bonding position; the core material structural board is a composite board of compressed or vacuum-sealed inorganic powder or organic fiber stacks; the thickness of the heat insulation layer is 0.05-5mm, and it is a mica sheet.

[0009] As an improvement, the insulation layer is a structure of at least one of the following: insulation blanket, ultrafine glass wool felt, and high-silica wool felt.

[0010] As an improvement, the adhesive layer is at least one of water glass, wood adhesive, and hot melt adhesive, which is coated on the surface of the core material structural board to form a structure.

[0011] As an improvement, the heat insulation layer is disposed on the upper surface, lower surface, front surface, rear surface, left surface, and right surface of the core material structural plate.

[0012] As an improvement, at least one functional layer is also included between the insulation layer and the adhesive layer, and the functional layers are connected to each other, as well as to the insulation layer and the core material structural panel, through the adhesive layer.

[0013] As an improvement, the functional layer is at least one of PU board, honeycomb board, flame retardant layer, resin foam sheet, and waterproof structural layer.

[0014] As an improvement, the heat insulation mounting plate is placed on the surface of the new energy battery or the boiler.

[0015] Beneficial effects: The heat insulation installation plate proposed in this utility model places the heat insulation layer on the surface of the core material, and the core material is directly compressed or vacuumed. This connection structure can replace the current technology of simply covering new energy batteries with cotton felt. The heat insulation layer, such as the mica sheet in this utility model, has good strength, which not only effectively protects the core material, but also improves the construction operation during use, increases construction efficiency, and significantly reduces construction costs.

[0016] By installing the mounting plate of this utility model, it has the characteristics of being pollution-free, having good insulation, heat resistance, and voltage resistance, and can be used as a battery heat insulation sheet with good heat insulation performance. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the mounting plate of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0019] In the diagram: 1. Insulation layer; 2. Core material structural board; 3. PU board; 4. Honeycomb board; 5. Flame retardant layer. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the examples. These examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] See Figure 1 As shown, the mounting plate of this utility model has a structure including a heat insulation layer 1, an adhesive layer, and a core material structural plate 2. The heat insulation layer 1 is installed on at least one pair of opposite surfaces of the core material structural plate 2 through the adhesive layer, and the size of the heat insulation layer is the same as the size of the core material structural plate at the bonding position. The core material structural plate 2 is a vacuum-sealed pressed plate of inorganic powder or organic fiber stacks. The thickness of the heat insulation layer is 0.05-5mm, and it is a mica sheet.

[0022] Furthermore, the heat insulation layer has the structure of at least one of the following: heat insulation blanket, ultrafine glass wool felt, and high silica wool felt.

[0023] In this invention, the adhesive layer is selected from at least one of water glass, wood adhesive, and hot melt adhesive, and is coated on the surface of the core material structural board to form a structure. The heat insulation layer is disposed on the upper surface, lower surface, front surface, rear surface, left surface, and right surface of the core material structural board. At least one functional layer is also included between the heat insulation layer and the adhesive layer, and the functional layers are connected to each other, as well as to the heat insulation layer and the core material structural board, through the adhesive layer.

[0024] The functional layer is at least one of PU board, honeycomb board, resin foam sheet, and waterproof structural layer. The heat insulation mounting plate is placed on the surface of the new energy battery for heat insulation and fire protection.

[0025] A core material structural board is obtained by stacking and pressing nano-sized inorganic powders and / or organic fibers. The board can be pressed or cut to the required size according to actual dimensions. Then, water glass and wood adhesive are evenly coated onto the sides and surface of the core material structural board. Finally, a thermal insulation layer is attached to the adhesive. After bonding, it can be left to stand at room temperature to finalize. The dimensions of the thermal insulation layer are the same as those of the core material structural board.

[0026] As a specific embodiment of this utility model, the core material structural plate can be a pressed and molded plate of nano-sized fumed silica, or a pressed and molded plate of high silica fiber, ceramic fiber, or alumina, zirconium silicate, or silicon carbide.

[0027] The surface of the aforementioned mounting plate is a heat insulation layer. As a specific embodiment of this utility model, the heat insulation layer is a mica sheet, which can effectively protect the core material structural plate and has good strength. In addition, during installation, it can be placed directly on the surface, which greatly reduces the complexity of the operation process. Due to the complexity of the operation process, the yield is low. This process can effectively improve the yield.

[0028] Example 1

[0029] See Figure 2 As shown, this utility model features an installation plate structure with added multi-layer functional layers, including a core material structure plate 2, a heat insulation layer 1, a PU board 3, a honeycomb board 4, and a waterproof structural layer 5. The PU board 3, honeycomb board 4, and flame-retardant layer 5 are sequentially pasted between the core material structure plate 2 and the heat insulation layer 1 from the inside out, providing shock absorption, sound insulation, and flame retardant effects. The flame-retardant layer 5 is a known flame-retardant material structure, such as antimony pentoxide; the honeycomb board is a plate structure with a honeycomb structure.

[0030] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat insulation sheet for new energy batteries, characterized in that: It includes a heat insulation layer, an adhesive layer, and a core material structural board; the heat insulation layer is installed on at least one pair of opposite surfaces of the core material structural board through the adhesive layer, and the size of the heat insulation layer is the same as the size of the core material structural board at the bonding position; the core material structural board is a vacuum-sealed pressed board of inorganic powder or organic fiber stacks; the heat insulation layer is a mica sheet with a thickness of 0.05-5mm.

2. The heat insulation sheet for new energy batteries according to claim 1, characterized in that: The insulation layer is composed of at least one of the following: insulation blanket, ultrafine glass wool felt, and high-silica wool felt.

3. The heat insulation sheet for new energy batteries according to claim 1, characterized in that: The adhesive layer is at least one of water glass, wood adhesive, and hot melt adhesive, and is a structure formed by coating the core material structural board.

4. The heat insulation sheet for new energy batteries according to claim 1, characterized in that: The heat insulation layer is disposed on the upper surface, lower surface, front surface, rear surface, left surface, and right surface of the core material structural plate.

5. The heat insulation sheet for new energy batteries according to claim 1, characterized in that: The insulation layer and the adhesive layer are connected by at least one functional layer, and the functional layers are connected to each other, as well as to the insulation layer and the core material structural board, by the adhesive layer.

6. The heat insulation sheet for new energy batteries according to claim 5, characterized in that: The functional layer is at least one of PU board, honeycomb board, flame retardant layer, resin foam sheet, and waterproof structural layer.

7. The heat insulation sheet for new energy batteries according to claim 1, characterized in that: The heat insulation sheet for the new energy battery is placed on the surface of the new energy battery.

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