Carbon ceramic battery heating film

Abstract

The utility model discloses a kind of carbon ceramic battery heating films, belong to battery technical field, it is characterized in that, including flexible substrate;Carbon ceramic heating layer, carbon ceramic slurry is printed on the surface of flexible substrate by silk screen printing mode;Electrode, including positive electrode and negative electrode, positive electrode and negative electrode are set on the two side end faces of carbon ceramic heating layer by the way of sticking, and extend to the outside of flexible substrate;Film layer, by the way of hot melt glue hot melting is set on the carbon ceramic heating layer end face of electrode side.The carbon ceramic battery heating film can be inserted in the gap between battery module, the beneficial effects of the utility model are: carbon ceramic slurry is printed on the surface of flexible substrate by silk screen printing mode of carbon ceramic heating layer, and flexible substrate forms integrated heating body, with flexible, ultrathin characteristics, heat production is more uniform, can be inserted between battery module, can be applied to narrow gap and irregular gap.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a carbon ceramic battery heating film. Background Technology

[0002] Batteries, especially solid-state batteries, face challenges in cold environments, including reduced effective battery capacity and the risk of failing to start. In northern my country, electric vehicles cannot be widely adopted for these reasons, and traditional automobiles remain the mainstream in the northern automotive market. The exhaust pollution from traditional vehicles has a continuous impact on the environment of northern my country.

[0003] To address the problem of batteries failing to start in cold environments, several heating solutions have emerged. Patent CN213150877 U employs indirect heating, using an external heater to heat the liquid, which is then heated through a pipe wrapped around the battery surface. This device is complex, has a long start-up time, and carries the risk of liquid leakage.

[0004] National utility model patent with patent number 202221086741.2 discloses a heating film, a battery pack and a battery device. The body has a first side and a second side in a direction parallel to the side of the battery. The heating wire is located at least between the opening and the first side, but not between the opening and the second side. When the heating film is disposed on the side of the battery, the first side faces downward in the vertical direction.

[0005] Through the above structural design, this utility model utilizes the opening to give the heating film resistance to deformation, making it less likely to peel or tear from the battery surface when subjected to tensile force, thus improving the adhesion performance of the heating film to the battery when it expands. Simultaneously, placing the heating wire between the opening and the first side edge enhances the heating performance of the heating film on the side of the battery pack. However, this structure uses a heating wire, and due to the limitations of its heating principle and structural characteristics, this leads to the problem of excessive localized heating at the corners of the heating wire structure. Utility Model Content

[0006] To address the aforementioned problems and overcome the shortcomings of existing technologies, this utility model provides a carbon ceramic battery heating film; The first technical problem to be solved was the use of indirect heating, where the liquid is heated by an external heater and then further heated by a pipe wrapped around the surface of the battery. This new device is complex, has a long start-up time, and carries the risk of liquid leakage.

[0007] The second technical problem to be solved is the heating film with heating wire. Due to the limitations of its heating principle and structural characteristics, the heating wire structure suffers from excessive local heating at the corners.

[0008] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: the carbon ceramic battery heating film is characterized in that it includes a flexible substrate. The carbon ceramic heating layer is made by screen printing carbon ceramic paste onto the surface of a flexible substrate. The electrodes include a positive electrode and a negative electrode, which are attached to the two end faces of the carbon ceramic heating layer and extend to the outside of the flexible substrate. The coating layer is applied to the end face of the carbon ceramic heating layer on the electrode side by hot-melt adhesive.

[0009] Furthermore, the carbon ceramic battery heating film can be inserted into the gap between battery modules.

[0010] Furthermore, the thickness of the flexible substrate is 0.05-0.15 mm.

[0011] Furthermore, the electrode is connected to a power source via wires and a switch.

[0012] Furthermore, the power source is an external power source or a battery module power source.

[0013] Furthermore, the flexible substrate is made of PP film, PET film or PI film.

[0014] Furthermore, the thickness of the carbon ceramic heating layer is no more than 1 mm.

[0015] Furthermore, the electrode is a copper foil, silver foil, aluminum foil, or aluminum alloy.

[0016] Furthermore, the width of the electrode is 3-10 mm.

[0017] Furthermore, the coating layer is made of PP film, PET film or PI film.

[0018] The beneficial effects of this utility model are: The inventiveness of this utility model lies in the following: it creatively utilizes a carbon ceramic heating layer printed on the surface of a flexible substrate by screen printing a conductive and heat-generating carbon ceramic paste, forming an integrated heating element with the flexible substrate. This element is flexible and ultra-thin, and can be inserted between battery modules, making it suitable for narrow and irregular gaps.

[0019] One advantage of this invention is that it provides a carbon ceramic heating layer that is creatively printed on the surface of a flexible substrate using carbon ceramic paste through screen printing. This forms an integrated heating element with the flexible substrate, which is flexible and ultra-thin. The carbon ceramic paste is uniformly printed on the surface of the flexible substrate, and the resulting carbon ceramic heating layer produces more uniform heat compared to existing heating wires, avoiding the problem of excessive local heating caused by the corners of the heating wire structure.

[0020] One advantage of this invention is that the side coating of the carbon ceramic heating layer, which is applied to the electrode side by hot melt adhesive, provides insulation and voltage resistance. It is very thin and can withstand a maximum temperature of 120 degrees Celsius, thus ensuring heat transfer stability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of this utility model in an embodiment; in the figure: 1. Electrode, 2. Flexible substrate, 3. Carbon ceramic heating layer, 4. Coating layer, 5. Battery module. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Specific embodiments of this utility model: The carbon ceramic battery heating film is characterized by comprising a flexible substrate 2. The carbon ceramic heating layer 3 is formed by screen printing carbon ceramic paste onto the surface of the flexible substrate 2. Electrode 1 includes a positive electrode and a negative electrode, which are attached to the two end faces of the carbon ceramic heating layer 3 and extend to the outside of the flexible substrate 2. The coating layer 4 is applied to the end face of the carbon ceramic heating layer 3 on the electrode 1 side by hot melt adhesive.

[0024] Furthermore, the carbon ceramic battery heating film is inserted into the gap between the battery modules 5.

[0025] Furthermore, the thickness of the flexible substrate 2 is 0.05-0.15 mm.

[0026] Furthermore, the electrode 1 is connected to a power source via wires and a switch.

[0027] Furthermore, the power source is an external power source or the power source of the battery module 5.

[0028] Furthermore, the flexible substrate 2 is made of PP film, PET film or PI film.

[0029] Furthermore, the thickness of the carbon ceramic heating layer 3 is no greater than 1 mm.

[0030] Furthermore, the electrode 1 is made of copper foil, silver foil, aluminum foil, or aluminum alloy.

[0031] Furthermore, the width of the electrode 1 is 3-10 mm.

[0032] Furthermore, the coating layer 4 is made of PP film, PET film or PI film.

[0033] It should be noted that this utility model is a carbon ceramic battery heating film. In specific operation... I. Preparation of heating film for carbon ceramic battery: 1. The flexible substrate 2 is made of PP film, PET film, or PI film, and its thickness is 0.05-0.15mm. Using the flexible substrate 2 made of the aforementioned material as the substrate, carbon ceramic paste is printed onto the surface of the flexible substrate 2 using screen printing. As a supplement: the carbon ceramic slurry is a viscous slurry independently developed by our company, for which we have applied for invention patent number 202411548138.5, "A method for preparing and applying a low resistivity electrothermal material". This utility model adopts the reference to introduce this carbon ceramic slurry. In a room temperature environment, monomer A and acid are added to water and stirred for 40 minutes at a disperser speed of 450-750 rpm. Carbon material is added to the solution in batches and dispersed at a disperser speed of 700-1000 rpm. After all the material has been added, the disperser speed is increased to 1100-1350 rpm and stirred for 0.5 hours until the slurry surface is uniform and free of particulate matter, thus obtaining a viscous carbon ceramic slurry. Specifically: the viscous carbon ceramic slurry is stirred evenly, and then printed onto the flexible substrate 2 by screen printing. After printing, it is baked in a forced-air oven at 70 ℃ for 0.5-1 hour. The flexible substrate 2 is then removed and cooled to room temperature. 2. Electrode 1 is made of copper foil, silver foil, aluminum foil or aluminum alloy. The positive and negative electrodes are attached to the two end faces of the carbon ceramic heating layer 3 and extend to the outside of the flexible substrate 2. 3. The coating layer 4 is a PP film, PET film or PI film, which is fixed to the end face of the carbon ceramic heating layer 3 on the side of the electrode 1 by hot melt adhesive through high temperature hot melting. This forms an integrated heating body with flexible substrate 2, carbon ceramic heating layer 3, electrode 1 and coating layer 4. It has the characteristics of flexibility and ultra-thinness. The carbon ceramic paste is uniformly printed on the surface of the flexible substrate. The resulting carbon ceramic heating layer has more uniform heat generation than the existing heating wire, avoiding the problem of excessive local heating caused by the corner of the heating wire structure. 4. The coating layer 4 provides insulation and voltage resistance. It is very thin and can withstand a maximum temperature of 120 degrees Celsius, ensuring heat transfer stability.

[0034] II. Application of carbon ceramic battery heating film: The carbon ceramic battery heating film is inserted into the gap between the battery modules 5. The positive and negative terminals of electrode 1 are provided with tabs, which are connected to the power supply through wires and a switch. In one embodiment of this utility model, the electrode tab is directly connected to the power supply of the battery module 5 via a wire and a switch. By opening and closing the switch, the battery module 5 is heated using the power supplied by the battery module 5. In one embodiment of this utility model, the electrode tab can also be connected to an external power source via a wire and a switch. By opening and closing the switch, the battery module 5 can be heated using the power supplied by the battery module 5. The advantages of this invention are: the flexible substrate 2, the carbon ceramic heating layer 3, the electrode 1, and the coating layer 4 form an integrated heating element, which combines the characteristics of toughness, flexibility, and ultra-thinness, and can be inserted into the gaps between battery modules 5. The problem of battery module 5 bulging during charging and discharging has been solved. After the battery module 5 bulges, the gaps become irregular. The heating wires of the existing heating film are deformed by compression, which exacerbates the problem of uneven heating.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A carbon ceramic battery heating film, characterized in that, Including flexible substrates (2), The carbon ceramic heating layer (3) is made by screen printing carbon ceramic paste onto the surface of the flexible substrate (2). Electrode (1) includes a positive electrode and a negative electrode, which are attached to the two end faces of the carbon ceramic heating layer (3) and extend to the outside of the flexible substrate (2). The coating layer (4) is applied to the end face of the carbon ceramic heating layer (3) on the electrode (1) side by hot melt adhesive.

2. The carbon ceramic battery heating film according to claim 1, characterized in that, The carbon ceramic battery heating film is inserted into the gap between the battery modules (5).

3. The carbon ceramic battery heating film according to claim 1, characterized in that, The thickness of the flexible substrate (2) is 0.05-0.15 mm.

4. The carbon ceramic battery heating film according to claim 1, characterized in that, The electrode (1) is connected to the power source via wires and a switch.

5. The carbon ceramic battery heating film according to claim 4, characterized in that, The power source is an external power source or the power source of the battery module (5).

6. A carbon ceramic battery heating film according to any one of claims 1-5, characterized in that, The flexible substrate (2) is made of PP film, PET film or PI film.

7. The carbon ceramic battery heating film according to claim 6, characterized in that, The thickness of the carbon ceramic heating layer (3) is no more than 1 mm.

8. The carbon ceramic battery heating film according to claim 6, characterized in that, The electrode (1) is made of copper foil, silver foil, aluminum foil or aluminum alloy.

9. A carbon ceramic battery heating film according to claim 8, characterized in that, The width of the electrode (1) is 3-10 mm.

10. A carbon ceramic battery heating film according to claim 6, characterized in that, The coating layer (4) is made of PP film, PET film or PI film.

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