Tile-shaped heating device

Abstract

The utility model particularly relates to a tile-shaped heating device, which comprises a tile-shaped heating sheet body, an NTC (Negative Temperature Coefficient) thermistor and a lead, the tile-shaped heating sheet body comprises a tile-shaped ceramic outer layer, a tile-shaped ceramic inner layer and a circuit layer, and the circuit layer is arranged between the tile-shaped ceramic outer layer and the tile-shaped ceramic inner layer; the lead is arranged at one end of the tile-shaped ceramic outer layer and is connected with the line leading-out end; and the NTC thermistor is arranged on the outer side surface of the tile-shaped ceramic outer layer. The tile-shaped ceramic inner layer can be well attached to the surface of the battery, so that the tile-shaped heating sheet body is high in heating efficiency, efficient and energy-saving; the lead is arranged on the tile-shaped ceramic outer layer, so that the connection with an external power supply is facilitated, and the fitting degree between the tile-shaped ceramic inner layer and the battery is not influenced; the NTC thermistor is arranged on the outer surface of the tile-shaped ceramic heating sheet body, temperature sensing is more accurate, temperature feedback of a compensating circuit is more accurate and rapid, real-time temperature can be effectively fed back, external temperature control equipment can conduct temperature control according to the fed-back actual temperature, and using is safer and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of heating elements, in particular to a tile-type heating device. Background Art

[0002] Electric vehicle batteries are prone to performance degradation in low temperature environments, so self-heating is required to maintain normal operating temperature. The self-heating of electric vehicle batteries can be achieved through internal circuits and external power supplies. The purpose of heating the battery self-heating is to maintain the normal operating temperature of the battery and prevent the battery from performing poorly or failing to work properly in a low temperature environment. In a low temperature environment, the internal electrolyte of the battery will become viscous, and the reaction speed of the battery will be affected, resulting in a decrease in battery performance. At the same time, in a low temperature environment, the self-discharge rate of the battery will also accelerate, resulting in a decrease in battery capacity. Therefore, in a low temperature environment, how to ensure the normal operating temperature of the battery, thereby ensuring the performance of the electric vehicle battery at low temperatures, is very necessary. By using a heating element, it can be wrapped around the outside of the battery for heating. However, the existing heating elements often have poor adhesion to the battery surface and poor heating effect, and the structure is relatively complex, which urgently needs further improvement. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a tile-type heating device, which has a good fit with the battery surface, has excellent temperature balance, fast heating speed, and good temperature compensation effect, which helps to achieve high efficiency and energy saving, safety and environmental protection.

[0004] To achieve the above-mentioned purpose, a tile-type heating device includes a tile-type heating sheet, an NTC thermistor and a lead. The tile-type heating sheet includes a tile-type ceramic outer layer, a tile-type ceramic inner layer and a circuit layer. The circuit layer is arranged between the tile-type ceramic outer layer and the tile-type ceramic inner layer. The outer side surfaces of the tile-type ceramic outer layer and the tile-type ceramic inner layer are both convex arc surfaces; the lead is arranged at one end of the tile-type ceramic outer layer and extends out of the tile-type ceramic outer layer, the circuit layer is provided with a circuit lead-out end, and the lead is connected to the circuit lead-out end; the NTC thermistor is arranged on the outer side surface of the tile-type ceramic outer layer.

[0005] Furthermore, an NTC lead wire is provided at one end of the NTC thermistor, and the NTC lead wire extends out of one end of the tile-shaped ceramic outer layer.

[0006] Furthermore, the tile-shaped heating device also includes a high-temperature thermally conductive adhesive layer, which is arranged on the outer side of the tile-shaped ceramic outer layer, and the NTC thermistor is bonded to the tile-shaped ceramic outer layer via the high-temperature thermally conductive adhesive layer.

[0007] Furthermore, the high-temperature thermal conductive adhesive layer is an epoxy resin adhesive layer.

[0008] Furthermore, the lead wire and the NTC lead wire extend in the same direction.

[0009] Furthermore, at least two welding notches arranged at intervals are formed at one end of the tile-shaped ceramic outer layer, and the number of the lead wires is at least two, and the lead wires extend into and are welded to the corresponding welding notches.

[0010] Furthermore, the number of the welding notches and the number of the leads are both two, the circuit lead-out end includes two lead contact portions spaced apart, the lead contact portions are located below the corresponding welding notches and exposed in the welding notches, and the leads are connected to the corresponding lead contact portions.

[0011] Furthermore, the circuit layer includes a hollow area and a non-hollow area arranged on the outer side of the tile-shaped ceramic inner layer, the hollow area includes two circuit lead-out terminals arranged at intervals and a connecting portion for connecting two lead contact portions, and the connecting portion is in the shape of a repeatedly tortuous strip.

[0012] Furthermore, the bending curvatures of the tile-shaped ceramic outer layer and the tile-shaped ceramic inner layer are the same.

[0013] The beneficial effects of the utility model are as follows: the utility model sets the ceramic heating element into a tile-shaped structure to obtain a tile-shaped heating sheet, which includes a tile-shaped ceramic outer layer, a tile-shaped ceramic inner layer and a circuit layer. The tile-shaped ceramic inner layer can be well fitted with the battery surface, so that the heating efficiency of the tile-shaped heating sheet is high and the heat can be fully utilized, thereby achieving high efficiency and energy saving; the lead of the tile-shaped heating sheet is arranged on the tile-shaped ceramic outer layer, which is convenient for connection with an external power supply and does not affect the fit between the tile-shaped ceramic inner layer and the battery; by arranging an NTC thermistor on the outer surface of the tile-shaped ceramic heating sheet, the temperature sensing is more accurate, the temperature feedback of the compensation circuit is more precise and rapid, and the real-time temperature can be effectively fed back. The external temperature control device can control the temperature according to the actual temperature fed back, thereby improving the performance and stability of the equipment and making it safer and more reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the tile-type heating device of the utility model.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the tile-type heating device of the utility model from another viewing angle.

[0016] Figure 3 It is an exploded view of the tile-type heating device of the utility model.

[0017] Figure 4 It is a top view of the tile-type heating device of the utility model.

[0018] The accompanying drawings are marked as: 1, tile-shaped heating sheet; 11, tile-shaped ceramic outer layer; 111, welding notch; 12, tile-shaped ceramic inner layer; 13, circuit layer; 131, circuit lead end; 132, connecting part; 2, lead wire; 3, NTC thermistor; 31, NTC lead wire. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0020] like Figure 1-4 As shown, a tile-type heating device comprises a tile-type heating sheet 1, an NTC thermistor 3 and a lead 2, wherein the tile-type heating sheet 1 comprises a tile-type ceramic outer layer 11, a tile-type ceramic inner layer 12 and a circuit layer 13, wherein the circuit layer 13 is arranged between the tile-type ceramic outer layer 11 and the tile-type ceramic inner layer 12, wherein the outer side surfaces of the tile-type ceramic outer layer 11 and the tile-type ceramic inner layer 12 are both convex arc surfaces, and the inner side surfaces of the tile-type ceramic outer layer 11 and the tile-type ceramic inner layer 12 are both concave arc surfaces; the lead 2 is arranged at one end of the tile-type ceramic outer layer 11 and extends out of the tile-type ceramic outer layer 11, the circuit layer 13 is provided with a circuit lead-out terminal 131, and the lead 2 is connected to the circuit lead-out terminal 131; the NTC thermistor 3 is arranged on the outer side surface of the tile-type ceramic outer layer 11.

[0021] In this embodiment, the ceramic heating element is set as a tile-shaped structure to obtain a tile-shaped heating sheet 1, which includes a tile-shaped ceramic outer layer 11, a tile-shaped ceramic inner layer 12 and a circuit layer 13. The tile-shaped ceramic inner layer 12 can be well attached to the battery surface to ensure that the heating effect of the tile-shaped heating sheet 1 is fully utilized, thereby achieving high efficiency and energy saving; the lead 2 of the tile-shaped heating sheet is arranged on the tile-shaped ceramic outer layer 11, which is convenient for connecting to an external power supply and does not affect the fit between the tile-shaped ceramic inner layer 12 and the battery, and is more practical and reliable. The tile-shaped ceramic outer layer 11 and the tile-shaped ceramic inner layer 12 have the advantages of good insulation, resistance to cold and heat shock, and low thermal expansion coefficient, which ensure the stability of the tile-shaped heating sheet 1 in low temperature environment or other harsh environment; the tile-shaped heating sheet 1 can heat up quickly, and can quickly reach the set temperature without long-term preheating after startup, and its stable working temperature range is relatively narrow, and there will be no problem of overheating or insufficient heating, and there is no power attenuation after long-term use, which is safer and more reliable to use.

[0022] Furthermore, one end of the NTC thermistor 3 is provided with an NTC lead wire 31, and the NTC lead wire 31 extends out of one end of the tile-shaped ceramic outer layer 11. The NTC thermistor 3 is a negative temperature coefficient thermistor, and its resistance value decreases with increasing temperature. In this embodiment, by arranging the NTC thermistor 3 on the outer surface of the tile-shaped ceramic heating plate, the temperature sensing is more accurate, the temperature feedback of the compensation circuit is more accurate and rapid, and the real-time temperature can be effectively fed back. The external temperature control device can perform temperature control according to the actual temperature fed back, thereby improving the performance and stability of the device and making it safer and more reliable to use.

[0023] Furthermore, the tile-shaped heating device also includes a high-temperature thermally conductive adhesive layer, and the high-temperature thermally conductive adhesive layer is arranged on the outer side of the tile-shaped ceramic outer layer 11, and the NTC thermistor 3 is bonded to the tile-shaped ceramic outer layer 11 via the high-temperature thermally conductive adhesive layer. The high-temperature thermally conductive adhesive layer is an epoxy resin adhesive layer. With the arrangement of the above structure, the NTC thermistor 3 can be firmly bonded to the outer side of the tile-shaped ceramic outer layer 11, and the high-temperature thermally conductive adhesive layer has good high-temperature resistance and thermal conductivity, is safe and reliable to use, and does not affect the fit between the tile-shaped ceramic inner layer 12 and the battery. The high-temperature thermally conductive adhesive layer of this embodiment is made of a high-temperature resistant epoxy resin adhesive layer in the prior art, which is used here.

[0024] Furthermore, the lead wire 2 and the line lead end 131 are located at the same end of the tile-shaped heating sheet 1, and the extension direction of the lead wire 2 and the NTC lead wire 31 is the same. Due to the above-mentioned structure, the lead wire 2 and the NTC lead wire 31 are easy to connect to the external power supply, the structure is compact, and the use is more convenient.

[0025] Furthermore, at least two welding notches 111 are provided at one end of the tile-shaped ceramic outer layer 11, and the number of the lead wires 2 is at least two, and the lead wires 2 are extended into and welded to the corresponding welding notches 111. The welding notches 111 penetrate the outer side and the inner side of the tile-shaped ceramic outer layer 11. In this embodiment, the welding notches 111 are used as the welding places of the lead wires 2, and the welding places of the lead wires 2 of the tile-shaped heating sheet are arranged in the tile-shaped ceramic outer layer 11. The lead wires 2 extend into the welding notches 111 and can be welded to the inner wall of the welding notches 111, and are firmly connected to the tile-shaped heating sheet body 1, which is more convenient to connect to an external power source and does not affect the fit between the tile-shaped heating sheet body 1 and the battery, and is practical and reliable.

[0026] Furthermore, the number of the welding notch 111 and the number of the lead 2 are both two, and the circuit lead end 131 includes two lead contact portions arranged at intervals, and the lead contact portion is located below the corresponding welding notch 111 and exposed in the welding notch 111, that is, the welding notch 111 passes through the tile-shaped ceramic outer layer 11, so that the lead contact portion is exposed at the lower end opening of the welding notch 111, and the lead 2 is connected to the corresponding lead contact portion. In this embodiment, the number of the lead 2 and the NTC lead 31 are both two, and the two NTC lead 31 are arranged at intervals and parallel to each other. The two NTC lead 31 are located between the two parallel lead 2, and the structural design is reasonable and convenient for connecting to an external power supply.

[0027] Furthermore, the circuit layer 13 includes a hollow area and a non-hollow area arranged on the outer side of the tile-shaped ceramic inner layer 12, and the hollow area includes two lead contact portions arranged at intervals and a connecting portion 132 for connecting the two lead contact portions, and the connecting portion 132 is in the shape of a strip that repeatedly twists and turns. In this embodiment, the circuit layer 13 is printed on the outer side of the tile-shaped ceramic inner layer 12 using a conductive paste, and the circuit lead-out end 131 is connected to the strip-shaped connecting portion 132 to form a conductive heating circuit, which is convenient for transferring heat to the tile-shaped ceramic inner layer 12 and the tile-shaped ceramic outer layer 11.

[0028] Furthermore, the curvature of the tile-shaped ceramic outer layer 11 and the tile-shaped ceramic inner layer 12 are the same or approximately the same. In this embodiment, the outer side surface and the inner side surface of the tile-shaped ceramic outer layer 11 and the outer side surface and the inner side surface of the tile-shaped ceramic inner layer 12 are concentric arc surfaces, and the tile-shaped ceramic outer layer 11 and the tile-shaped ceramic inner layer 12 are respectively located on both sides of the circuit layer 13, with high heat utilization rate, and the tile-shaped ceramic outer layer 11 and the tile-shaped ceramic inner layer 12 can achieve good bonding, thereby increasing the reliability of the tile-shaped heating sheet 1.

[0029] Further, the arc length of the outer side surface of the tile-shaped ceramic outer layer 11 is greater than the arc length of the outer side surface of the tile-shaped ceramic inner layer 12, and the arc length of the inner side surface of the tile-shaped ceramic outer layer 11 is greater than the arc length of the inner side surface of the tile-shaped ceramic inner layer 12, that is, the arc length of the outer side of the longitudinal section of the tile-shaped ceramic outer layer 11 is greater than the arc length of the outer side of the longitudinal section of the tile-shaped ceramic inner layer 12, and the arc length of the inner side of the longitudinal section of the tile-shaped ceramic outer layer 11 is greater than the arc length of the inner side of the longitudinal section of the tile-shaped ceramic inner layer 12. The radius of the outer side surface of the tile-shaped ceramic outer layer 11 is greater than the radius of the outer side surface of the tile-shaped ceramic inner layer 12, and the radius of the inner side surface of the tile-shaped ceramic outer layer 11 is greater than the radius of the inner side surface of the tile-shaped ceramic inner layer 12.

[0030] In this embodiment, the size of the tile-shaped ceramic outer layer 11 is larger than the size of the tile-shaped ceramic inner layer 12. The tile-shaped ceramic outer layer 11 can be well fitted with the tile-shaped ceramic inner layer 12, and effectively protect the circuit layer 13 located between the tile-shaped ceramic outer layer 11 and the tile-shaped ceramic inner layer 12. The overall tile-shaped heating sheet 1 has a high degree of fit with the battery, a compact structure, and strong practicality.

[0031] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A tile-type heating device, characterized in that: It includes a tile-shaped heating sheet, an NTC thermistor and a lead. The tile-shaped heating sheet includes a tile-shaped ceramic outer layer, a tile-shaped ceramic inner layer and a circuit layer. The circuit layer is arranged between the tile-shaped ceramic outer layer and the tile-shaped ceramic inner layer. The outer side surfaces of the tile-shaped ceramic outer layer and the tile-shaped ceramic inner layer are both convex arc surfaces. The lead is arranged at one end of the tile-shaped ceramic outer layer and extends out of the tile-shaped ceramic outer layer. The circuit layer is provided with a circuit lead-out end, and the lead is connected to the circuit lead-out end. The NTC thermistor is arranged on the outer side surface of the tile-shaped ceramic outer layer.

2. The tile-type heating device according to claim 1, characterized in that: An NTC lead wire is arranged at one end of the NTC thermistor, and the NTC lead wire extends out of one end of the tile-shaped ceramic outer layer.

3. The tile-type heating device according to claim 2, characterized in that: The tile-shaped heating device also includes a high-temperature thermally conductive adhesive layer, which is arranged on the outer side of the tile-shaped ceramic outer layer, and the NTC thermistor is bonded to the tile-shaped ceramic outer layer via the high-temperature thermally conductive adhesive layer.

4. The tile-type heating device according to claim 3, characterized in that: The high temperature thermal conductive adhesive layer is an epoxy resin adhesive layer.

5. The tile-type heating device according to claim 2, characterized in that: The lead wire and the NTC lead wire extend in the same direction.

6. The tile-type heating device according to claim 5, characterized in that: One end of the tile-shaped ceramic outer layer is provided with at least two welding notches arranged at intervals, the number of the lead wires is at least two, and the lead wires extend into and are welded to the corresponding welding notches.

7. The tile-type heating device according to claim 6, characterized in that: The number of the welding notches and the number of the leads are both two, the circuit lead-out end comprises two lead contact portions spaced apart, the lead contact portions are located below the corresponding welding notches and exposed in the welding notches, and the leads are connected to the corresponding lead contact portions.

8. The tile-type heating device according to claim 7, characterized in that: The circuit layer includes a hollow area and a non-hollow area arranged on the outer side of the tile-shaped ceramic inner layer. The hollow area includes two lead contact parts arranged at intervals and a connecting part for connecting the two lead contact parts. The connecting part is in a repeatedly tortuous strip shape.

9. The tile-type heating device according to claim 1, characterized in that: The tile-shaped ceramic outer layer and the tile-shaped ceramic inner layer have the same bending curvature.

10. The tile-type heating device according to claim 1, characterized in that: The arc length of the outer side surface of the outer layer of the tile-shaped ceramic is greater than the arc length of the outer side surface of the inner layer of the tile-shaped ceramic, and the radius of the outer side surface of the outer layer of the tile-shaped ceramic is greater than the radius of the outer side surface of the inner layer of the tile-shaped ceramic.

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