Heating sheet and outdoor power supply

Abstract

The invention discloses a heating piece and an outdoor power supply, and relates to the technical field of heating pieces, the heating piece comprises a heating body and a carrier used for placing the heating body, the carrier is provided with a first wiring area and a second wiring area, a positive electrode access end and a negative electrode access end are arranged in the first wiring area, the heating body is arranged in the second wiring area, and the heating body is arranged in the second wiring area. The anode access end is connected with one end of the heating body through a first wire, and the cathode access end is connected with the other end of the heating body through a second wire; wherein the first wiring area and the second wiring area are arranged along a first direction, the first wire extends out along a second direction through the positive electrode access end and then is connected to one end of the heating body, and the second wire extends out along a direction opposite to the second direction through the negative electrode access end and then is connected to the other end of the heating body; the invention aims to solve the problem that when an existing heating sheet is held by a hand for use, the pressure of fingers easily acts on the middle area of the heating sheet, so that a wire in the middle area is damaged.

Description

Technical Field

[0001] The invention relates to the technical field of heating sheets, and in particular to a heating sheet and an outdoor power supply. Background Art

[0002] In order to cope with the impact of low temperature environment on battery performance, heating sheets are widely used in battery systems. The main function of the heating sheet is to increase the temperature of the battery by generating heat, so that the electrolyte can restore normal fluidity, thereby improving the battery's charge and discharge performance. In this way, the car can maintain stable battery performance in a low temperature environment, ensuring that starting and driving are not affected.

[0003] The heating element of the heating sheet is usually arranged in the form of a line on the insulating layer to form a certain resistance network. The heating element is connected to the power supply current through the positive and negative terminals. When the current passes through these resistance networks, the Joule heating effect is generated, thereby converting electrical energy into heat energy.

[0004] However, the heating elements of the existing heating sheet connected to the positive and negative terminals are generally arranged in a straight line in the middle area of ​​the heating sheet, which increases the risk of the heating elements being crushed to a certain extent, because when the heating sheet is held in hand, the pressure of the fingers is likely to act on the middle area of ​​the heating sheet, causing damage to the heating elements in the middle area. Summary of the invention

[0005] The main purpose of the present invention is to provide a heating sheet and an outdoor power supply, aiming to solve the problem that when the existing heating sheet is held in hand, the pressure of fingers easily acts on the middle area of ​​the heating sheet, causing damage to the heating element in the middle area.

[0006] To achieve the above object, the present invention provides a heating sheet, which comprises a heating element and a carrier for placing the heating element, wherein the heating element is arranged on the carrier in the form of a circuit, and the heating circuit comprises:

[0007] Positive electrode access terminal;

[0008] Negative electrode access terminal;

[0009] The carrier has a first wiring area and a second wiring area, the positive electrode access terminal and the negative electrode access terminal are arranged in the first wiring area, the heating element is arranged in the second wiring area, the positive electrode access terminal is connected to one end of the heating element via a first wiring line, and the negative electrode access terminal is connected to the other end of the heating element via a second wiring line;

[0010] Among them, the first wiring area and the second wiring area are arranged along the first direction, the first wiring is extended along the second direction through the positive electrode access end and then connected to one end of the heating element, and the second wiring is extended along the opposite direction of the second direction through the negative electrode access end and then connected to the other end of the heating element; the first direction is the width direction of the carrier, and the second direction is the length direction of the carrier.

[0011] In one embodiment, the first routing line includes a first section and a second section; the first end of the first section of the first routing line is connected to the positive electrode access end, the second end of the first section of the first routing line extends through the positive electrode access end along the second direction and is connected to the first end of the second section of the first routing line, and the second end of the second section of the first routing line is connected to one end of the heating element;

[0012] In one embodiment, the second routing line includes a first section and a second section; the first end of the first section of the second routing line is connected to the negative electrode access end, the second end of the first section of the second routing line extends along the second direction through the negative electrode access end and is connected to the first end of the second section of the second routing line, and the second end of the second section of the second routing line is connected to one end of the heating element;

[0013] The second section of the second routing line includes at least one S-shaped curve.

[0014] In one embodiment, the S-shaped curve includes any one of a step curve, a wavy curve or a spiral curve.

[0015] In one implementation, the first routing line and the second routing line have opposite directions of exit.

[0016] In one embodiment, the thickness of the first wiring and the thickness of the second wiring are both greater than the thickness of the heating element.

[0017] In one embodiment, the middle position of the second wiring area is a first set point, and the heating element is arranged around the outer periphery of the first set point of the second wiring area, wherein the surrounding shape includes one of a square spiral shape and a circular spiral shape.

[0018] The present invention also provides an outdoor power supply, comprising any one of the heating sheets described above.

[0019] The heating sheet of the present invention comprises a heating element and a carrier, and the carrier has a first wiring area respectively provided with a positive access terminal and a negative access terminal and a second wiring area provided with a heating element, the positive access terminal is connected to one end of the heating element via a first wiring, and the negative access terminal is connected to the other end of the heating element via a second wiring. Since the first wiring is arranged along the second direction and the second wiring is arranged in the opposite direction of the second direction, and the second direction is the length direction of the carrier, the first wiring and the second wiring are both deviated from the middle area of ​​the carrier. With such arrangement, in actual application, when the user holds the heating sheet by hand, since the first wiring and the second wiring of the heating sheet of the present invention respectively used for accessing the positive access terminal and the negative access terminal are both deviated from the middle area of ​​the heating sheet, the first wiring and the second wiring will not be damaged due to the pressure of the fingers acting on the middle area of ​​the heating sheet. With such arrangement, in actual application, the heating sheet of the present invention is not easily crushed or broken by the fingers when it is hand-held and taken, thereby improving the overall durability and reliability of the heating sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of a heating sheet and an outdoor power supply provided by the present invention;

[0022] Figure 2 A schematic structural diagram of another embodiment of the heating sheet and outdoor power supply provided by the present invention;

[0023] Figure 3 A schematic structural diagram of another embodiment of the heating sheet and outdoor power supply provided by the present invention;

[0024] Figure 4 A schematic structural diagram of another embodiment of the heating sheet and outdoor power supply provided by the present invention;

[0025] Figure 5 It is a structural schematic diagram of an existing heating sheet.

[0026] Description of Figure Numbers:

[0027] 10. Carrier; 20. Heat generating element; 30. First wiring area; 40. Second wiring area; 50. First routing line; 51. First section of the first routing line; 52. Second section of the first routing line; 60. Second routing line; 61. First section of the second routing line; 62. Second section of the second routing line.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] In order to cope with the impact of low temperature environment on battery performance, heating sheets are widely used in battery systems. The main function of the heating sheet is to increase the temperature of the battery by generating heat, so that the electrolyte can restore normal fluidity, thereby improving the battery's charge and discharge performance. In this way, the car can maintain stable battery performance in a low temperature environment, ensuring that starting and driving are not affected.

[0033] The heating element of the heating sheet is usually arranged in the form of a line on the insulating layer to form a certain resistance network. The heating element is connected to the power supply current through the positive and negative terminals. When the current passes through these resistance networks, the Joule heating effect is generated, thereby converting electrical energy into heat energy.

[0034] However, the existing heating sheet is used to connect the heating element of the positive terminal and the negative terminal (reference Figure 5The heating elements 70 and 80 shown are generally arranged in a straight line in the middle area of ​​the heating sheet, which increases the risk of the heating element being crushed to a certain extent, because when the heating element is held in the hand, the pressure of the fingers is likely to act on the middle area of ​​the heating sheet, causing damage to the heating element in the middle area.

[0035] To this end, the main purpose of the present invention is to propose a heating sheet and an outdoor power supply, aiming to solve the problem that the pressure of fingers on the middle area of ​​the existing heating sheet when held in hand can easily cause damage to the heating element in the middle area.

[0036] refer to Figure 1-4 The present invention provides a heating sheet, the heating sheet comprising a heating element 20 and a carrier 10 for placing the heating element 20, the heating element 20 is arranged on the carrier 10 in the form of a circuit, and the heating circuit comprises:

[0037] The positive electrode is connected to the + terminal;

[0038] Negative electrode access terminal -;

[0039] The carrier 10 has a first wiring area 30 and a second wiring area 40, the positive electrode access terminal and the negative electrode access terminal are arranged in the first wiring area 30, the heating element 20 is arranged in the second wiring area 40, the positive electrode access terminal is connected to one end of the heating element 20 via a first wiring 50, and the negative electrode access terminal is connected to the other end of the heating element 20 via a second wiring 60;

[0040] Among them, the first wiring area 30 and the second wiring area 40 are arranged along the first direction, the first wiring 50 is extended along the second direction through the positive electrode access end and then connected to one end of the heating element 20, and the second wiring 60 is extended along the opposite direction of the second direction through the negative electrode access end and then connected to the other end of the heating element 20; the first direction is the width direction of the carrier 10, and the second direction is the length direction of the carrier 10.

[0041] In this embodiment, in practical applications, one of the first direction and the second direction may be a length direction, and the other direction may be a width direction, which is not limited here.

[0042] In this embodiment, the heating element 20 is arranged on the carrier 10 in the form of a line. The larger the cross-sectional area or the longer the length of the heating element 20, the greater its impedance; when the heating element 20 is connected to a current source so that the current passing through the heating element 20 remains unchanged, the greater the impedance of the heating element 20, the greater the heating power of the heating element 20; when the heating element 20 is connected to a voltage source so that the voltage of the heating element 20 remains unchanged, the greater the impedance of the heating element 20, the smaller its heating power.

[0043] In this embodiment, the first wiring 50 and the second wiring 60 may be a part of the heating element 20 , and may also be used as wires for connecting the heating element 20 to the positive electrode access terminal and the negative electrode access terminal.

[0044] Specifically, the heating sheet of the present invention includes a heating element 20 and a carrier 10, the carrier 10 has a first wiring area 30 respectively provided with a positive access terminal and a negative access terminal and a second wiring area 40 provided with the heating element 20, the positive access terminal is connected to one end of the heating element 20 via a first wiring line 50, and the negative access terminal is connected to the other end of the heating element 20 via a second wiring line 60. Since the first wiring line 50 extends in the second direction and the second wiring line 60 extends in the opposite direction of the second direction, the second direction is the length direction of the carrier 10, so the first wiring line 50 and the second wiring line 60 are both deviated from the middle area of ​​the carrier 10, for example, with reference to Figure 1 , the first line 50 extends in the right direction along the length direction, and the second line 60 extends in the left direction along the length direction, so that the first line 50 and the second line 60 are both deviated from the middle area of ​​the carrier 10. With such a configuration, in actual applications, when the user holds the heating sheet in hand, since the first line 50 and the second line 60 used to access the positive access terminal and the negative access terminal of the heating sheet of the present invention are respectively deviated from the middle area of ​​the heating sheet, the first line 50 and the second line 60 will not be damaged by the pressure of the fingers on the middle area of ​​the heating sheet. With such a configuration, in actual applications, the heating sheet of the present invention is not easily crushed or broken by fingers when it is hand-held, which can improve the overall durability and reliability of the heating sheet.

[0045] refer to Figure 2-3 In one embodiment of the present invention, the first wiring 50 includes a first section 51 and a second section 52; the first end of the first section 51 of the first wiring 50 is connected to the positive electrode access end, the second end of the first section 51 of the first wiring 50 extends along the second direction through the positive electrode access end and is connected to the first end of the second section 52 of the first wiring 50, and the second end of the second section 52 of the first wiring 50 is connected to one end of the heating element 20;

[0046] The second section 52 of the first line 50 includes at least one S-shaped curve.

[0047] In this embodiment, the second end of the first wiring 50 is set to an S-shaped curve. The curved first wiring 50 and the second wiring 60 can disperse stress more effectively when subjected to finger pressure. Compared with existing straight-line wires, when the first wiring 50 or the second wiring 60 is distributed in a straight line and subjected to finger pressure, its contact area is smaller and the pressure is concentrated in a smaller area, so that the first wiring 50 or the second wiring 60 is easily broken. The curved wire has a larger contact area, and the pressure can be distributed in a wider area, reducing the stress concentration per unit area, thereby reducing the risk of fracture caused by stress concentration.

[0048] Furthermore, the S-shaped curve includes any one of a step curve, a wavy curve or a spiral curve.

[0049] In one embodiment of the present invention, the second wiring 60 includes a first section 51 and a second section 62; the first end of the second section 62 of the second wiring 60 is connected to the negative electrode access end, the second end of the second section 62 of the second wiring 60 extends along the second direction through the negative electrode access end and is connected to the first end of the second section 62 of the second wiring 60, and the second end of the second section 62 of the second wiring 60 is connected to one end of the heating element 20;

[0050] The second section 62 of the second line 60 includes at least one S-shaped curve.

[0051] In this embodiment, the structure of the second section 62 of the second routing line 60 is the same as the structure of the second section 52 of the first routing line 50, and both include at least one S-shaped curve. Therefore, the technical effect of the second section 62 of the second routing line 60 is also the same as that of the second section 52 of the first routing line 50 mentioned above, and will not be repeated here.

[0052] The positive access terminal and the negative access terminal of the heating sheet are both arranged on the metal sheet. When a person holds the heating sheet, since the metal sheet is relatively hard, when the heating sheet is bent, the bending part is likely to appear on the side of the middle area of ​​the two metal sheets close to the carrier 10. In this way, if the first wiring 50 and the second wiring 60 both extend out on the same side of the positive access terminal and the negative access terminal close to the middle area of ​​the carrier 10, they are likely to be broken when the heating sheet is bent.

[0053] Therefore, in one embodiment of the present invention, the first wiring 50 and the second wiring 60 have opposite directions of exit.

[0054] In this embodiment, reference Figure 3The outgoing direction of the first wiring 50 is to the right of the positive electrode access terminal, and the outgoing direction of the second wiring 60 is to the left of the negative electrode access terminal. The outgoing direction of the first wiring 50 is opposite to the outgoing direction of the second wiring 60. With such an arrangement, when the heating sheet is bent and the bend is on the side of the middle area between the positive electrode access terminal and the negative electrode access terminal close to the carrier 10, since the outgoing direction of the first wiring 50 is opposite to the outgoing direction of the second wiring 60 and both are along the length direction of the carrier 10, the first wiring 50 and the second wiring 60 will not be broken. In this way, in actual application, the heating sheet of the present invention is not easily crushed or broken by fingers when held in hand, thereby improving the overall durability and reliability of the heating sheet.

[0055] refer to Figure 4 In one embodiment of the present invention, the carrier 10 includes a first end, a second end and a middle area, the first end and the second end of the carrier 10 are respectively arranged on a first side of the middle area of ​​the carrier 10 and a second side opposite to the first side, the first end and the second end of the carrier 10 are both arranged along the second direction, and the first end and the second end of the carrier 10 are both arranged close to the edge of the carrier 10; the positive electrode access terminal is located at the first end of the carrier 10, and the negative electrode access terminal is located at the second end of the carrier 10.

[0056] In this embodiment, if the length of the heating sheet is the same as the length of the heating object and the heating object requires the use of multiple heating sheets, the positive electrode access terminals of the multiple heating sheets are at the rightmost / leftmost side of the carrier 10 (heating object), and the negative electrode access terminals are at the leftmost / rightmost side of the carrier 10 (heating object). In this way, the user does not need to distinguish the positive electrode access terminals and the negative electrode access terminals one by one when wiring. The user only needs to directly connect the wires after understanding the positions of the multiple positive electrode access terminals and the multiple negative electrode access terminals, thereby simplifying the wiring process, and users or maintenance personnel can more easily discover and correct potential wiring problems, avoiding system failures caused by wiring errors.

[0057] In an embodiment of the present invention, the thickness of the first wiring 50 and the thickness of the second wiring 60 are both greater than the thickness of the heating element 20 .

[0058] In this embodiment, when the wiring is subjected to external forces (such as pressing or bending by fingers), the stress inside it will be distributed along the cross section. Due to its larger cross-sectional area, the thicker wiring can disperse these stresses more effectively, thereby reducing the risk of local stress concentration. And the thicker wiring has better toughness, that is, it can undergo a certain degree of elastic deformation without immediately breaking when subjected to external forces. Better toughness helps to absorb and disperse impact energy and reduce the risk of fracture. With such a configuration, in actual applications, the heating sheet of the present invention is not easily broken or snapped by fingers when held in hand, which can improve the overall durability and reliability of the heating sheet.

[0059] In one embodiment of the present invention, the middle position of the second wiring area 40 is the first set point, and the heating element 20 is arranged around the outer periphery of the first set point of the second wiring area 40, wherein the surrounding shape includes one of a square spiral shape or a circular spiral shape.

[0060] The heating element 20 of the existing heating sheet is generally arranged on the carrier 10 in a wave-shaped arrangement. However, the wave-shaped arrangement has only a single stress point in the vertical direction of the wave, so it is easy to be broken.

[0061] In this regard, in the present embodiment, the shape of the heating element 20 is set to be one of the spiral shapes of a square spiral or a circular spiral. With such a setting, the heating element 20 has multiple stress points distributed in the vertical direction or the horizontal direction. When subjected to pressure, the multiple stress points can disperse the stress and reduce the single-point stress situation. Therefore, the square spiral or circular spiral heating element 20 is not easy to be broken. With such a setting, in actual applications, the heating sheet of the present invention is not easy to be crushed or broken by fingers when held in hand, thereby improving the overall durability and reliability of the heating sheet.

[0062] The present invention also provides an outdoor power supply, comprising the heating sheet as described above.

[0063] It is worth noting that since the outdoor power supply of the present invention is based on the above-mentioned heating sheet, the embodiments of the outdoor power supply of the present invention include all technical solutions of all embodiments of the above-mentioned heating sheet, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0064] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heating sheet, characterized in that: The heating sheet includes a heating element and a carrier for placing the heating element, the heating element is arranged on the carrier in the form of a circuit, and the heating circuit includes: Positive electrode access terminal; Negative electrode access terminal; The carrier has a first wiring area and a second wiring area, the positive electrode access terminal and the negative electrode access terminal are arranged in the first wiring area, the heating element is arranged in the second wiring area, the positive electrode access terminal is connected to one end of the heating element via a first wiring line, and the negative electrode access terminal is connected to the other end of the heating element via a second wiring line; Among them, the first wiring area and the second wiring area are arranged along the first direction, the first wiring is extended along the second direction through the positive electrode access end and then connected to one end of the heating element, and the second wiring is extended along the opposite direction of the second direction through the negative electrode access end and then connected to the other end of the heating element; the first direction is the width direction of the carrier, and the second direction is the length direction of the carrier.

2. The heating sheet according to claim 1, characterized in that: The first routing line includes a first section and a second section; the first end of the first section of the first routing line is connected to the positive electrode access end, the second end of the first section of the first routing line extends through the positive electrode access end along the second direction and is connected to the first end of the second section of the first routing line, and the second end of the second section of the first routing line is connected to one end of the heating element; Wherein, the second section of the first routing line includes at least one S-shaped curve.

3. The heating sheet according to claim 1, characterized in that: The second wiring includes a first section and a second section; the first end of the first section of the second wiring is connected to the negative electrode access end, the second end of the first section of the second wiring extends along the second direction through the negative electrode access end and is connected to the first end of the second section of the second wiring, and the second end of the second section of the second wiring is connected to one end of the heating element; The second section of the second routing line includes at least one S-shaped curve.

4. The heating sheet according to claim 2 or 3, characterized in that: The S-shaped curve includes any one of a step curve, a wavy curve or a spiral curve.

5. The heating sheet according to any one of claims 2 or 3, characterized in that: The first routing line and the second routing line have opposite exit directions.

6. The heating sheet according to claim 1, characterized in that: The thickness of the first wiring and the thickness of the second wiring are both greater than the thickness of the heating element.

7. The heating sheet according to claim 1, characterized in that: The carrier includes a first end, a second end and a middle area, the first end and the second end of the carrier are respectively arranged at the left end and the right end of the middle area of ​​the carrier, the first end and the second end of the carrier are both arranged along the second direction, and the first end and the second end of the carrier are both arranged close to the edge of the carrier.

8. The heating sheet according to claim 1, characterized in that: The middle position of the second wiring area is a first set point, and the heating element is arranged around the outer periphery of the first set point of the second wiring area, wherein the surrounding shape includes one of a square spiral shape and a circular spiral shape.

9. An outdoor power supply, characterized in that: It comprises the heating sheet as described in any one of claims 1 to 8.

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