MCH heating structure and heating bag applied to lithium battery drying oven

Abstract

The utility model discloses an MCH heating structure and a heating bag applied to a lithium battery drying oven. The MCH heating structure comprises a heating unit composed of a metal ceramic heating body, a wire, a reinforcing layer and a heat dissipation assembly. The metal ceramic heating body saves about 20-30% of electric energy compared with a PTC heater under the same working condition, and the outer layer of the metal ceramic heating body is coated with the reinforcing layer, so that the metal ceramic heating body can be reinforced; the heat dissipation assembly is arranged, the heat conduction structure is compact, the air contact area can be increased, and the air heating effect of the heater is improved; wherein the heating bag comprises a through ventilation pipe, a plurality of mounting positions for mounting the MCH heating structures are arranged on the ventilation cross section of the ventilation pipe, and the MCH heating structures are mounted in the mounting positions, so that the contact area of the heater and the air can be increased, the temperature of the air in the drying oven is increased quickly, and no power attenuation exists.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery baking devices, in particular to an MCH heating structure and a heating pack applied to a lithium battery oven. Background Art

[0002] The commonly used electric heating methods for drying in the oven of lithium battery coating machines are U-tube heaters and PTC heaters. However, U-tube heaters will turn red under high temperature conditions and are not suitable for positive electrode coating (positive electrode slurry will produce explosive NMP gas during the drying process, which is easy to explode when in contact with U-tube heaters). PTC heaters have obvious power attenuation during use, and generally the installed power of PTC is about twice the calculated power, resulting in a larger installed power.

[0003] As a new type of electric heater, MCH metal ceramic heater not only has a fast heating speed (the surface of the heater can reach over 200°C within 10 seconds at rated power) and a small impact current, but also has the advantages of corrosion resistance, high temperature resistance, long life, high efficiency and energy saving, uniform temperature, good thermal conductivity, and fast thermal compensation. Compared with the same type of PTC heater, the use of MC metal ceramic heater can save about 20%-30% of electricity under the same heating effect; however, the existing MCH metal ceramic heater has a simple structure and poor air heating effect; and there is no suitable installation structure for use in lithium battery ovens, which limits its application. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an MCH heating structure and a heating pack with good thermal conductivity for use in a lithium battery oven.

[0005] The first technical solution adopted by the utility model to solve its technical problem is:

[0006] An MCH heating structure applied to a lithium battery oven includes a heating unit, wherein the heating unit includes:

[0007] Metal ceramic heating element;

[0008] Lead wires, which are arranged at both ends of the metal ceramic heating element;

[0009] A reinforcement layer, which is coated on the outer surface of the metal ceramic heating element and is used to reinforce the metal ceramic heating element;

[0010] The heat dissipation components are arranged on both sides of the metal ceramic heating element and are used for conducting and dissipating the heat generated by the metal ceramic heating element.

[0011] The MCH heating structure as described above comprises a plurality of the heating units, the heating units are arranged side by side in sequence and the heat dissipation components are adjacent to each other.

[0012] The second technical solution adopted by the utility model to solve its technical problem is:

[0013] A heating pack used in a lithium battery oven comprises a through ventilation pipe, wherein a plurality of mounting positions are arranged on the ventilation cross section of the ventilation pipe, and the above-mentioned MCH heating structure is installed in the mounting positions.

[0014] As described above, the heating pack, the ventilation pipe is a square ventilation pipe, the ventilation cross section of the square ventilation pipe is provided with cross-arranged cross beams and longitudinal beams, the cross beams, the longitudinal beams and the inner wall of the square ventilation pipe enclose a plurality of the installation positions;

[0015] The longitudinal beam is provided with a plurality of inner through slots for the metal ceramic heating element and / or the wire to extend out.

[0016] As described above, the heating pack has a plurality of longitudinal beams, which are spaced apart from each other; a baffle is fixedly provided on one side of an adjacent longitudinal beam, and a wire discharge port is provided on the side wall of the ventilation duct along the length direction of the baffle; the two longitudinal beams and the baffle form a concave structure.

[0017] As for the heating pack as described above, the longitudinal beam is also provided with an interface for the cross beam to be plugged in.

[0018] As described above, the heating pack, the ventilation pipe includes a groove arranged adjacent to the installation position of the MCH heating structure, the groove extends toward the inside of the ventilation pipe, a closure member detachably connected to the ventilation pipe is arranged in the groove, the closure member is embedded in the groove, and the MCH heating structure can be fixed in the installation position.

[0019] As described above, the heating pack has a plurality of external through grooves for the metal ceramic heating element and / or the wire to extend out of the sealing member; and a wiring connection structure is provided on the outer surface of the ventilation pipe and located on the side of the groove.

[0020] As described above, the heating pack has a reducing pipe connected to the opening of the ventilation pipe, the opening area of ​​one end of the reducing pipe is equal to the opening area of ​​the ventilation pipe and is connected to the ventilation pipe, and the opening area of ​​the other end of the reducing pipe is greater than or smaller than the opening area of ​​the ventilation pipe.

[0021] As for the heating pack described above, a flange is provided at the opening of the reducer facing away from the ventilation pipe, and a fixing position for installing a fixing part is provided on the flange.

[0022] The beneficial effects of the utility model are:

[0023] 1. The MCH heating structure provided by the utility model, the metal ceramic heating element saves about 20-30% of electric energy compared with the PTC heater under the same working conditions. A reinforcing layer is coated on the outer layer of the metal ceramic heating element to reinforce the metal ceramic heating element; a heat dissipation component is provided, and the heat conduction structure is compact, which can increase the contact area with the air and improve the heating effect of the heater on the air.

[0024] 2. The utility model provides a heating pack for lithium battery oven, including a through ventilation pipe, wherein a plurality of mounting positions for installing an MCH heating structure are provided on the ventilation cross section of the ventilation pipe, and the above-mentioned MCH heating structure is installed in the mounting position, which can increase the contact area between the heater and the air, so that the air in the oven heats up quickly without power attenuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a front view of the MCH heating structure in the utility model;

[0027] Figure 2 It is a front view of the heating pack in the utility model;

[0028] Figure 3 It is one of the three-dimensional diagrams of the heating pack in the utility model;

[0029] Figure 4 yes Figure 3 A magnified view of the structure of the middle A part;

[0030] Figure 5 This is the second stereoscopic diagram of the heating pack in the present invention. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0032] Reference Figure 1, an MCH heating structure applied to a lithium battery oven, comprising a heating unit 1, wherein the heating unit 1 comprises:

[0033] Metal ceramic heating element 11;

[0034] Wires 12, which are arranged at both ends of the metal ceramic heating element 11;

[0035] A reinforcing layer 13, which is coated on the outer surface of the metal ceramic heating element 11 and is used to reinforce the metal ceramic heating element 11;

[0036] The heat dissipation components 14 are disposed on both sides of the metal ceramic heating element 11 and are used to conduct and dissipate the heat generated by the metal ceramic heating element 11 .

[0037] The MCH heating structure adopted by the utility model heats up quickly and has a shorter heating time. Compared with PTC heaters and U-tube heaters, it can heat the air to a predetermined temperature in a short time. The MCH heating structure provided by the utility model saves about 20-30% of electric energy of the metal ceramic heating element compared with the PTC heater under the same working conditions. A reinforcing layer is coated on the outer layer of the metal ceramic heating element to reinforce the metal ceramic heating element. A heat dissipation component is provided, and the heat conduction structure is compact, which can increase the contact area with the air and improve the heating effect of the heater on the air.

[0038] The manufacturing process of the metal ceramic heating element 11 in this embodiment adopts high-temperature co-firing multilayer ceramic technology. The heating resistor slurry (tungsten, molybdenum, and other high-melting metals) is printed on the flowing steel billet (zirconia, alumina ceramics or zirconia toughened alumina ceramics, etc.) according to the design requirements of the heating circuit. The heating circuit is built into the ceramic material, and then the multiple layers are stacked and sintered at about 1650°C to make it integrated.

[0039] Specifically, the reinforcing layer 13 is aluminum foil, which can reinforce the metal ceramic heating element 11 to prevent the metal ceramic heating element 11 from being compressed. The aluminum foil and the heat dissipation component 14 can be welded or bonded by high-temperature resistant welding wire; the heat dissipation component 14 can be made of metal aluminum. Metal aluminum has good thermal conductivity and is light, easy to process, and corrosion-resistant. It can be used in the MCH heating structure to improve the heat conduction efficiency.

[0040] Specifically, the heat dissipation component 14 can be as follows Figure 1 The wavy heat dissipation component shown, the honeycomb heat dissipation component, the heat dissipation component composed of several hexagonal squares, or any heat dissipation component with a porous structure.

[0041] Furthermore, a plurality of the heating units 1 are arranged in parallel in sequence and the heat dissipation components 14 are adjacent to each other, forming an MCH heating structure. The superposition of a plurality of heating units 1 can increase the overall power of a single MCH heating structure.

[0042] A heating pack applied to a lithium battery oven comprises a through ventilation pipe 2, wherein a plurality of mounting positions 21 are provided on the ventilation cross section of the ventilation pipe 2, and the above-mentioned MCH heating structure is installed in the mounting position 21. The MCH heating structure is installed on the mounting position 21, which can increase the contact area between the heater and the air, so that the air in the oven heats up quickly without power attenuation.

[0043] Reference Figure 2 Further, the ventilation pipe 2 is a square ventilation pipe, and a cross beam 22 and a longitudinal beam 23 are arranged crosswise on the ventilation cross section of the square ventilation pipe, and the cross beam 22, the longitudinal beam 23 and the inner wall of the square ventilation pipe enclose a plurality of the installation positions 21;

[0044] The longitudinal beam 23 is provided with a plurality of inner through slots 231 for the metal ceramic heating element 11 and / or the wire 12 to extend out, so as to strengthen the fixation of the MCH heating structure.

[0045] Specifically, there are a plurality of longitudinal beams 23, and adjacent longitudinal beams 23 are arranged at intervals; a baffle 24 is fixedly provided on one side of an adjacent longitudinal beam 23, and a wire outlet 25 is provided on the side wall of the ventilation pipe 2 along the length direction of the baffle 24, and the two longitudinal beams 23 and the baffle 24 form a concave structure, and the concave structure can protect the wire 12;

[0046] The wire 12 on either side of the metal ceramic heating element 11 extends out through the inner through groove 231 , is placed in the concave structure, and passes through the wire outlet 25 along the length direction of the baffle 24 and extends out of the ventilation pipe 2 .

[0047] Reference Figure 3 , Figure 4 More specifically, the longitudinal beam 23 is also provided with an interface 232 for the cross beam 22 to be plugged in, and the cross beam 22 is fixedly connected to the longitudinal beam 23 through the interface 232 to fix the position of the MCH heating structure in the ventilation duct 2.

[0048] More specifically, the ventilation duct 2 includes a groove 26 arranged adjacent to the MCH heating structure mounting position 21, and the groove extends toward the interior of the ventilation duct 2. A closure member 27 detachably connected to the ventilation duct 2 is provided in the groove 26. The closure member 27 is embedded in the groove 26, and the MCH heating structure can be fixed in the mounting position 21.

[0049] Reference Figure 5More specifically, the closure member 27 is provided with a plurality of external through slots 271 for the metal ceramic heating element 11 and / or the wire 12 to extend out; a wiring connection structure 3 is provided on the outer surface of the ventilation pipe 2 and located at the side of the groove 26. The wire 12 extends out through the external through slots 271 and is fixed by the wiring connection structure 3.

[0050] More specifically, a through reducing pipe 4 is connected to the opening of the ventilation pipe 2, the opening area of ​​one end of the reducing pipe 4 is equal to the opening area of ​​the ventilation pipe 2 and is connected to the ventilation pipe 2, and the opening area of ​​the other end of the reducing pipe 4 is larger or smaller than the opening area of ​​the ventilation pipe 2, so as to facilitate the connection of air ducts of different shapes and sizes.

[0051] More specifically, the reducer 4 is provided with a flange 41 at the opening facing away from the ventilation pipe 2, and a fixing position 411 for installing a fixing member is provided on the flange; the fixing position 411 can be any connection structure in the prior art such as a screw.

[0052] More specifically, a thermocouple can be provided at any location in the heating pack to provide real-time temperature feedback on the temperature in the heating pack, to regulate the temperature of the heated air in real time, and to improve the drying quality of the electrode slurry inside the oven.

[0053] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An MCH heating structure applied to a lithium battery oven, characterized in that: The invention comprises a heating unit (1), wherein the heating unit (1) comprises: Metal ceramic heating element (11); Lead wires (12) are arranged at both side ends of the metal ceramic heating element (11); A reinforcing layer (13), which is coated on the outer surface of the metal ceramic heating element (11) and is used to reinforce the metal ceramic heating element (11); A heat dissipation component (14) is arranged on both sides of the metal ceramic heating element (11) and is used to conduct and dissipate the heat generated by the metal ceramic heating element (11).

2. The MCH heating structure according to claim 1, characterized in that: It comprises a plurality of the heating units (1), wherein the heating units (1) are arranged in sequence side by side and the heat dissipation components (14) are adjacent to each other.

3. A heating pack used in a lithium battery oven, characterized in that: It comprises a through ventilation pipe (2), wherein a plurality of mounting positions (21) are provided on the ventilation cross section of the ventilation pipe (2), and the MCH heating structure according to any one of claims 1 to 2 is installed in the mounting positions (21).

4. The heating pack according to claim 3, characterized in that: The ventilation pipe (2) is a square ventilation pipe, and a cross-beam (22) and a longitudinal beam (23) are arranged crosswise on the ventilation cross section of the square ventilation pipe, and the cross-beam (22), the longitudinal beam (23) and the inner wall of the square ventilation pipe enclose a plurality of the installation positions (21); The longitudinal beam (23) is provided with a plurality of inner through slots (231) through which the metal ceramic heating element (11) and / or the wire (12) extend.

5. The heating pack according to claim 4, characterized in that: There are a plurality of longitudinal beams (23), and adjacent longitudinal beams (23) are arranged at intervals; a baffle (24) is fixedly provided on one side of an adjacent longitudinal beam (23); a wire discharge port (25) is provided on a side wall of the ventilation pipe (2) along the length direction of the baffle (24); and the two longitudinal beams (23) and the baffle (24) form a concave structure.

6. The heating pack according to claim 4, characterized in that: The longitudinal beam (23) is also provided with an interface (232) for the cross beam (22) to be plugged in.

7. The heating pack according to claim 4, characterized in that: The ventilation pipe (2) comprises a groove (26) arranged adjacent to the MCH heating structure installation position (21), the groove extending toward the interior of the ventilation pipe (2), a sealing member (27) detachably connected to the ventilation pipe (2) is arranged in the groove (26), and the sealing member (27) is embedded in the groove (26), so that the MCH heating structure can be fixed in the installation position (21).

8. The heating pack according to claim 7, characterized in that: The closure member (27) is provided with a plurality of external through grooves (271) for the metal ceramic heating element (11) and / or the wire (12) to extend out; and a wiring connection structure (3) is provided on the outer surface of the ventilation pipe (2) and located on the side of the groove (26).

9. The heating pack according to any one of claims 3 to 8, characterized in that: The opening of the ventilation pipe (2) is connected to a through-going reducer (4); the opening area of ​​one end of the reducer (4) is equal to the opening area of ​​the ventilation pipe (2) and is connected to the ventilation pipe (2); the opening area of ​​the other end of the reducer (4) is greater than or smaller than the opening area of ​​the ventilation pipe (2).

10. The heating pack according to claim 9, characterized in that: The reducer (4) is provided with a flange (41) at the opening facing away from the ventilation pipe (2), and a fixing part position (411) for installing a fixing part is provided on the flange.

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