Sector-ring-shaped heating sheet

Abstract

The utility model specifically relates to a sector-ring-shaped heating sheet, which comprises a heating sheet body and a lead, the heating sheet body comprises a sector-ring-shaped ceramic upper layer, a circuit layer and a sector-ring-shaped ceramic lower layer, the circuit layer is arranged between the sector-ring-shaped ceramic upper layer and the sector-ring-shaped ceramic lower layer, and the circuit layer is provided with a lead contact part; and one end of the lead is connected with the outer arc side of the sector-ring-shaped ceramic upper layer and the lead contact part. The fan-ring-shaped heating sheet can be arranged on the surface of the positive electrode of the battery to heat the battery, is well matched with the surface of the battery, is good in temperature compensation effect and high in heat utilization rate, can achieve the purposes of high efficiency and energy conservation, and is simple in structure and safe and reliable in use.

Description

Technical Field

[0001] The utility model relates to the technical field of heating elements, in particular to a fan-shaped heating sheet. Background Art

[0002] With the development of science and technology and the progress of society, electric vehicles have been widely used. As an important component of electric vehicles, electric vehicle batteries have an important role and influence on the performance of electric vehicles. At this stage, electric vehicle batteries are easily affected by low temperature environments. In low temperature environments, the electrolyte inside them will become viscous and the reaction speed will be affected, resulting in a decrease in battery performance. Therefore, self-heating is required to keep the battery at a normal operating temperature. In the prior art, the self-heating of electric vehicle batteries can usually be achieved by liquid cooling cycles and directly installing a heating device on the battery pack. However, existing heating devices often have problems such as complex structure, high cost, and low heating efficiency, and need to be further optimized and improved. 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 fan-shaped ring-shaped heating sheet, which is placed on the surface of the positive electrode of the battery to heat the battery. It can achieve good cooperation with the battery surface, has good temperature compensation effect, high heat utilization rate, and can achieve the purpose of high efficiency and energy saving. It has a simple structure and is safe and reliable when used.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fan-shaped ring-shaped heating sheet, including a heating sheet body and a lead, the heating sheet body including a fan-shaped ring-shaped ceramic upper layer, a circuit layer and a fan-shaped ring-shaped ceramic lower layer, the circuit layer is arranged between the fan-shaped ring-shaped ceramic upper layer and the fan-shaped ring-shaped ceramic lower layer, and the circuit layer is provided with a lead contact portion; one end of the lead is connected to the outer arc side of the fan-shaped ring-shaped ceramic upper layer and the lead contact portion.

[0005] Furthermore, a plurality of welding notches arranged at intervals are provided on the outer arc side of the fan-shaped ring-shaped ceramic upper layer, and the welding notches are formed by the outer arc surface of the fan-shaped ring-shaped ceramic upper layer being recessed inward, and the welding notches penetrate the top and bottom surfaces of the fan-shaped ring-shaped ceramic upper layer; the number of the leads and the lead contact parts are both multiple, and the lead contact part is exposed in the corresponding welding notch, one end of the lead extends into the corresponding welding notch and is connected to the lead contact part, and one end of the lead is welded to the inner wall of the welding notch.

[0006] Furthermore, two welding notches arranged at intervals are provided on the outer arc side of the fan-shaped ring-shaped ceramic upper layer, and the welding notches are formed by the outer arc surface of the fan-shaped ring-shaped ceramic upper layer being recessed inward, and the welding notches penetrate the top and bottom surfaces of the fan-shaped ring-shaped ceramic upper layer; the number of the leads and the lead contact parts are both two, and the lead contact part is exposed in the corresponding welding notch, one end of the lead extends into the corresponding welding notch and is connected to the lead contact part, and one end of the lead is welded to the inner wall of the welding notch.

[0007] Furthermore, the circuit layer includes a heating circuit for connecting two lead contact parts. The heating circuit is arranged on the fan-shaped ceramic lower layer and is in the shape of a strip that folds back and forth. The heating circuit is connected to the two lead contact parts to form a conductive heating path.

[0008] Furthermore, the two lead contact portions are located at the same end of the outer arc side of the fan-shaped ceramic lower layer, the other ends of the two leads extend out of the outer arc side of the fan-shaped ceramic upper layer and extend in the same direction, and the two leads are parallel to each other.

[0009] Furthermore, the two welding gaps each include a first inner wall, a second inner wall opposite to the first inner wall, and a third inner wall located between the first inner wall and the second inner wall. The first inner wall, the second inner wall and the third inner wall are arranged to form a receiving cavity for the lead wire to extend into, and the outer openings of the two welding gaps are in the same direction.

[0010] Furthermore, the first inner wall and the second inner wall are parallel to each other, the third inner wall is perpendicular to both the first inner wall and the second inner wall, and the lead is perpendicular to the third inner wall.

[0011] Furthermore, the cross-sectional area of ​​the fan-shaped ring-shaped ceramic lower layer is greater than half of the circular ring area corresponding to the cross-sectional area of ​​the fan-shaped ring-shaped ceramic lower layer.

[0012] Furthermore, the fan-shaped ring-shaped heating plate also includes a limiting member, which includes a protruding portion and two fixing plates respectively arranged at both ends of the protruding portion, the fixing plates are connected to the top surface of the fan-shaped ring-shaped ceramic upper layer, the protruding portion is arranged above the lead and the welding notch and is provided with a limiting hole for the lead to pass through.

[0013] The beneficial effects of the utility model are as follows: the utility model arranges the heating sheet body into a fan ring shape, which includes a fan ring-shaped ceramic upper layer, a circuit layer and a fan ring-shaped ceramic lower layer; the fan ring-shaped heating sheet body can be placed on the surface of the positive electrode of the battery to heat the battery, and achieves good coordination with the battery surface, has good temperature compensation effect, and has high heat utilization rate, and can achieve the purpose of high efficiency and energy saving; the fan ring-shaped heating sheet has a simple structure and is safe and reliable when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a top view of the fan-shaped ring-shaped heating plate of Example 1.

[0015] Figure 2 It is a schematic diagram of the decomposition of the fan-shaped ring heating plate of Example 1.

[0016] Figure 3 It is a schematic diagram of the structure of the circuit layer of Example 1.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the fan-shaped ring-shaped heating plate of Example 2.

[0018] The accompanying drawings are marked as: 1. heating plate body; 11. fan-shaped ceramic upper layer; 12. fan-shaped ceramic lower layer; 13. circuit layer; 131. lead contact portion; 132. heating circuit; 14. welding notch; 15. outer arc surface; 16. inner arc surface; 2. lead; 3. limiter; 31. protrusion; 32. fixing plate. 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] Example 1

[0021] like Figure 1-3 As shown, a fan-shaped ring-shaped heating sheet includes a heating sheet body 1 and a lead 2. The heating sheet body 1 includes a fan-shaped ring-shaped ceramic upper layer 11, a circuit layer 13 and a fan-shaped ring-shaped ceramic lower layer 12. The circuit layer 13 is arranged between the fan-shaped ring-shaped ceramic upper layer 11 and the fan-shaped ring-shaped ceramic lower layer 12. The circuit layer 13 is provided with a lead contact portion 131; one end of the lead 2 is connected to the outer arc side of the fan-shaped ring-shaped ceramic upper layer 11 and the lead contact portion 131.

[0022] In this embodiment, the fan-shaped ring-shaped ceramic lower layer 12 and the fan-shaped ring-shaped ceramic upper layer 11 both include a top surface, a bottom surface opposite to the top surface, and an outer arc surface 15, a first end surface, an inner arc surface 16 and a second end surface located between the top surface and the bottom surface. The outer arc surface 15, the first end surface, the inner arc surface 16 and the second end surface are connected end to end in sequence, and a fan-shaped gap is formed between the first end surface and the second end surface.

[0023] The utility model sets the heating sheet body 1 in a fan-shaped ring, which includes a fan-shaped ring-shaped ceramic upper layer 11, a circuit layer 13 and a fan-shaped ring-shaped ceramic lower layer 12. The fan-shaped ring-shaped heating sheet body 1 is placed on the surface of the positive electrode of the battery to heat the battery. The inner arc surface of the heating sheet body 1 contacts the surface of the positive electrode of the battery. The inner arc surfaces of the fan-shaped ring-shaped ceramic upper layer 11 and the fan-shaped ring-shaped ceramic lower layer 12 are clamped on the outer surface of the positive electrode of the battery, and can achieve good matching with the surface of the positive electrode of the battery; the lead 2 is arranged on the outer arc side of the fan-shaped ring-shaped ceramic upper layer 11, that is, the side with the outer arc surface, which does not affect the matching of the heating sheet body 1 and the battery surface; the fan-shaped ring-shaped ceramic upper layer 11 and the fan-shaped ring-shaped ceramic lower layer 12 are both made of ceramic material, which has the advantages of good insulation, resistance to cold and heat shock, low thermal expansion coefficient, etc., which ensures the stability of the heating sheet body 1 in low temperature environment or other harsh environment, and has high heat utilization rate; the fan-shaped ring-shaped heating sheet can achieve the purpose of high efficiency and energy saving when used, and its structure is simple, safe and reliable.

[0024] Furthermore, the cross-sectional area of ​​the fan-shaped annular ceramic lower layer 12 is greater than half of the area of ​​the circular ring corresponding to the cross-sectional area of ​​the fan-shaped annular ceramic lower layer 12. In this embodiment, except that the fan-shaped annular ceramic upper layer 11 is provided with a welding notch 14, the shape and cross-sectional area of ​​the fan-shaped annular ceramic upper layer 11 and the fan-shaped annular ceramic lower layer 12 are substantially the same, and the arc lengths of the inner arc surface 16 and the outer arc surface 15 of the fan-shaped annular ceramic lower layer 12 and the fan-shaped annular ceramic upper layer 11 are greater than half of the length of the circular arc to which they correspond. That is, the shape of the fan-shaped annular ceramic lower layer 12 and the fan-shaped annular ceramic upper layer 11 are both fan rings with a larger area left after a fan ring with a smaller area is removed from a circular ring, and the cross-sectional area of ​​the fan-shaped notch is smaller than the cross-sectional area of ​​the fan-shaped annular ceramic lower layer 12 and the fan-shaped annular ceramic upper layer 11. Due to the above-mentioned structural arrangement, the fan-shaped annular ceramic lower layer 12 and the fan-shaped annular ceramic upper layer 11 can achieve good cooperation with the surface of the positive electrode of the battery, with a fast heating speed, good temperature compensation effect, and high heat utilization rate.

[0025] Furthermore, a plurality of welding notches 14 arranged at intervals are provided on the outer arc side of the fan-shaped ring-shaped ceramic upper layer 11, and the welding notch 14 is formed by the outer arc surface 15 of the fan-shaped ring-shaped ceramic upper layer 11 being recessed inward, and the welding notch 14 passes through the top and bottom surfaces of the fan-shaped ring-shaped ceramic upper layer 11; the number of the leads 2 and the lead contact portion 131 are both multiple, and the lead contact portion 131 is exposed in the corresponding welding notch 14, that is, the welding notch 14 passes through the fan-shaped ring-shaped ceramic upper layer 11, so that the lead contact portion is exposed at the lower end opening of the welding notch 14, one end of the lead 2 extends into the corresponding welding notch 14 and is connected to the lead contact portion 131, and one end of the lead 2 is welded to the inner wall of the welding notch 14.

[0026] In this embodiment, two welding notches 14 are provided at intervals on the outer arc side of the fan-shaped annular ceramic upper layer 11. The welding notches 14 are formed by the outer arc surface 15 of the fan-shaped annular ceramic upper layer 11 being recessed inward. The welding notches 14 penetrate the top and bottom surfaces of the fan-shaped annular ceramic upper layer 11. The number of the lead wires 2 and the lead wire contact portion 131 are both two. The lead wire contact portion 131 is exposed in the corresponding welding notch 14. One end of the lead wire 2 extends into the corresponding welding notch 14 and is connected to the lead wire contact portion 131. One end of the lead wire 2 is welded to the inner wall of the welding notch 14. The welding notch 14 penetrates the fan-shaped annular ceramic upper layer 11, which is convenient for processing. The lead wire contact portion 131 is located at the bottom of the corresponding welding notch 14, so that the lead wire 2 can contact the lead wire contact portion 131 after extending into the welding notch 14, thereby realizing the connection between the circuit layer 13 and the external power supply. At the same time, the lead wire 2 can be firmly welded in the welding notch 14.

[0027] Furthermore, the circuit layer 13 includes a heating circuit 132 for connecting two lead contact portions 131. The heating circuit 132 is arranged on the fan-shaped ceramic lower layer 12 and is in the shape of a strip that is folded back and forth. The heating circuit 132 is connected to the two lead contact portions 131 to form a conductive heating path. In this embodiment, the circuit layer 13 can be formed by printing a conductive heating paste on the fan-shaped ceramic lower layer 12. The contour of the circuit layer 13 is generally fan-shaped, which is roughly the same as the contour of the fan-shaped ceramic lower layer 12. The circuit layer 13 generates heat after being connected to an external power supply, and transfers the heat to the fan-shaped ceramic upper layer 11 and the fan-shaped ceramic lower layer 11, which helps to improve the heating efficiency, has a reasonable design, and is highly practical.

[0028] Furthermore, the two lead contact portions 131 are located at the same end of the outer arc side of the fan-shaped annular ceramic lower layer 12, and the other ends of the two leads 2 extend out of the outer arc side of the fan-shaped annular ceramic upper layer 11 and extend in the same direction, and the two leads 2 are parallel to each other. The two leads 2 extend in the direction away from the inner arc side of the fan-shaped annular ceramic upper layer 11 and extend in the same direction, which is convenient for connecting to an external power source and does not affect the fit between the fan-shaped annular heating sheet and the battery.

[0029] Furthermore, the two welding notches 14 each include a first inner wall, a second inner wall opposite to the first inner wall, and a third inner wall located between the first inner wall and the second inner wall, the first inner wall, the second inner wall and the third inner wall are arranged to form a receiving cavity for the lead wire 2 to extend into, and the outer openings of the two welding notches 14 are in the same direction. The first inner wall and the second inner wall are parallel to each other, the third inner wall is perpendicular to the first inner wall and the second inner wall, and the lead wire 2 is perpendicular to the third inner wall. In this embodiment, the welding notch 14 is roughly in the shape of a rectangular notch, and the two welding notches 14 are parallel to each other, which is convenient for processing the welding notch 14 and for installing two parallel leads 2, and does not affect the fit between the fan-shaped ring-shaped heating sheet and the battery.

[0030] Example 2

[0031] like Figure 4 As shown, the fan-shaped ring-shaped heating sheet also includes a limiter 3, and the limiter 3 includes a protrusion 31 and two fixing plates 32 respectively arranged at both ends of the protrusion 31, and the fixing plates 32 are connected to the top surface of the fan-shaped ring-shaped ceramic upper layer 11, and the protrusion 31 is arranged above the lead 2 and the welding notch 14 and is provided with a limiter hole for the lead 2 to pass through. In this embodiment, the protrusion 31 protrudes upward from the top surface of the fan-shaped ring-shaped ceramic upper layer 11, and the protrusion 31 is used to cover the lead 2 and the welding notch 14, and the fixing plate 32 is used to firmly connect the limiter 3 to the top surface of the fan-shaped ring-shaped ceramic upper layer 11, which helps to strengthen and protect the welding part of the lead 2, prevent the lead 2 from detaching upward from the fan-shaped ring-shaped ceramic upper layer 11, and improve the reliability of the fan-shaped ring-shaped heating sheet. The rest of the content of this embodiment is the same as that of embodiment 1, and will not be repeated here.

[0032] 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 fan-shaped heating sheet, characterized in that: The invention comprises a heating sheet body and a lead, wherein the heating sheet body comprises a fan-shaped ceramic upper layer, a circuit layer and a fan-shaped ceramic lower layer, wherein the circuit layer is arranged between the fan-shaped ceramic upper layer and the fan-shaped ceramic lower layer, and the circuit layer is provided with a lead contact portion; one end of the lead is connected to the outer arc side of the fan-shaped ceramic upper layer and the lead contact portion.

2. The fan-shaped ring-shaped heating sheet according to claim 1, characterized in that: A plurality of welding notches arranged at intervals are provided on the outer arc side of the fan-shaped ring-shaped ceramic upper layer, and the welding notches are formed by the outer arc surface of the fan-shaped ring-shaped ceramic upper layer being recessed inward, and the welding notches penetrate the top and bottom surfaces of the fan-shaped ring-shaped ceramic upper layer; the number of the leads and the lead contact parts are both multiple, and the lead contact part is exposed in the corresponding welding notch, one end of the lead extends into the corresponding welding notch and is connected to the lead contact part, and one end of the lead is welded to the inner wall of the welding notch.

3. The fan-shaped ring-shaped heating sheet according to claim 1, characterized in that: The outer arc side of the fan-shaped ceramic upper layer is provided with two welding notches arranged at intervals, and the welding notches are formed by the outer arc surface of the fan-shaped ceramic upper layer being recessed inward, and the welding notches penetrate the top surface and the bottom surface of the fan-shaped ceramic upper layer; the number of the leads and the lead contact parts are both two, and the lead contact part is exposed in the corresponding welding notch, one end of the lead extends into the corresponding welding notch and is connected to the lead contact part, and one end of the lead is welded to the inner wall of the welding notch.

4. The fan-shaped ring-shaped heating sheet according to claim 3, characterized in that: The circuit layer comprises a heating circuit for connecting two lead contact parts. The heating circuit is arranged on the fan-shaped ceramic lower layer and is in the shape of a strip that folds back and forth.

5. The fan-shaped ring-shaped heating sheet according to claim 4, characterized in that: The two lead contact portions are located at the same end of the outer arc side of the fan-shaped ceramic lower layer, the other ends of the two leads extend out of the outer arc side of the fan-shaped ceramic upper layer and extend in the same direction, and the two leads are parallel to each other.

6. The fan-shaped ring-shaped heating sheet according to claim 4, characterized in that: The two welding gaps each include a first inner wall, a second inner wall opposite to the first inner wall, and a third inner wall located between the first inner wall and the second inner wall. The first inner wall, the second inner wall and the third inner wall are arranged to form a receiving cavity for the lead wire to extend into, and the outer openings of the two welding gaps are in the same direction.

7. The fan-shaped ring-shaped heating sheet according to claim 6, characterized in that: The first inner wall and the second inner wall are parallel to each other, the third inner wall is perpendicular to both the first inner wall and the second inner wall, and the lead is perpendicular to the third inner wall.

8. The fan-shaped ring-shaped heating sheet according to claim 1, characterized in that: The cross-sectional area of ​​the fan-shaped annular ceramic lower layer is greater than half of the circular ring area corresponding to the cross-sectional area of ​​the fan-shaped annular ceramic lower layer.

9. The fan-shaped ring-shaped heating sheet according to claim 1, characterized in that: The fan-shaped ring-shaped heating plate also includes a limiting member, which includes a protruding portion and two fixing plates respectively arranged at both ends of the protruding portion, the fixing plates are connected to the top surface of the fan-shaped ring-shaped ceramic upper layer, the protruding portion is arranged above the lead and the welding notch and is provided with a limiting hole for the lead to pass through.

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