CN219780431U

CN219780431U - Cell heating coil and cell heating device

Info

Publication number: CN219780431U
Application number: CN202320080454.9U
Authority: CN
Inventors: 邹海天; 彭文斌; 王江南
Original assignee: Hymson Laser Technology Group Co Ltd
Current assignee: Hymson Laser Technology Group Co Ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-09-29
Anticipated expiration: 2033-01-13

Abstract

The utility model relates to a battery core heating coil which comprises an exciting coil and an iron core, wherein the iron core is provided with a placing groove, the placing groove is used for placing the exciting coil, and the iron core is made of soft magnetic ferrite. The soft magnetic ferrite has lower loss when the working frequency of the electric core heating coil is higher, the performance is more stable and reliable, and the magnetic leakage can be reduced when the iron core is surrounded outside the exciting coil, so that the heating efficiency is improved; in addition, the ferrite core is formed by one-time sintering, compared with the complex lamination process of the silicon steel sheet, the cost is lower, and the production cost can be reduced.

Description

Cell heating coil and cell heating device

Technical Field

The utility model relates to the field of lithium battery equipment, in particular to a heating coil of an electric core.

Background

The traditional lithium battery cell heating mode adopts modes such as resistance wire, electric heating film to heat the cell, and is low in efficiency, and large in energy consumption is the ubiquitous problem, and the current novel technology adopts an electromagnetic induction heating mode to heat the cell, and the technology is a high-efficiency and low-energy-consumption heating technology, but in the lithium battery device cell heating process, when an electromagnetic induction coil works, the problem that the iron core heats seriously exists, and when the working frequency of the conventional electromagnetic induction heating coil rises and the current increases, the iron core heats up and is increased in multiple, the performance of the electromagnetic coil is seriously reduced, and the power consumption is large, so that the reliability for heating the cell is low, the efficiency is low, and the improvement is needed.

Disclosure of Invention

Based on this, it is necessary to provide a cell heating coil that improves heating efficiency and reliability.

The utility model provides a cell heating coil, which comprises:

an exciting coil; and

the iron core, the iron core is provided with the standing groove, the standing groove is used for placing exciting coil, the iron core is soft magnetic ferrite material.

In one embodiment, the core has a cut.

In one embodiment, the cutting opening is parallel to the axial direction of the exciting coil and penetrates through the side wall of the placing groove;

or, the cutting opening is an opening for communicating the outside with the placing groove.

In one embodiment, the exciting coil is cylindrical, the iron core is cylindrical, and the placing groove is cylindrical.

In one embodiment, the axial length of the core is greater than the axial length of the field coil.

In one embodiment, the field coil and the core are mounted by gluing or interference fit.

In one embodiment, the core is provided with a center post, the center post is fixed in the placement groove, the core is sleeved outside the exciting coil, and the exciting coil is sleeved outside the center post.

In one embodiment, the inner diameter of the excitation coil is in transition fit with the center post.

The utility model also provides a battery cell heating device, which comprises at least one cell heating coil, wherein the cell heating coil is arranged outside a battery cell to be heated, and the cell heating coil is electrified.

In one embodiment, the battery cell is a long-strip-shaped rectangular body or a structure similar to the long-strip-shaped rectangular body, and the heating coils of the battery cell are arranged on two large battery faces of the battery cell to clamp the battery cell in the middle; the battery cell heating coils are uniformly distributed on two sides of the battery cell.

The electric core heating coil provided by the utility model comprises the iron core and the exciting coil arranged in the placing groove of the iron core, wherein the iron core is made of soft magnetic ferrite, and the hysteresis phenomenon consumes less energy, so that the electric core heating coil has lower loss when the working frequency is higher, the performance is more stable and reliable, and the magnetic leakage can be reduced when the iron core is surrounded outside the exciting coil, and the heating efficiency is improved; in addition, the ferrite iron core is formed by one-time sintering, compared with the complex lamination process of the silicon steel sheet, the cost is lower, and the production cost can be reduced.

Drawings

FIG. 1 is an exploded view of a cell heating coil according to some embodiments of the present utility model;

fig. 2 is a schematic structural view of an iron core according to some embodiments of the present utility model;

fig. 3 is a perspective view of a core according to some embodiments of the present utility model;

FIG. 4 is a schematic diagram of the magnetic field of a core according to some embodiments of the present utility model;

FIG. 5 is a schematic diagram of a battery cell heating device and a battery cell according to some embodiments of the utility model;

fig. 6 is a front view of the structure shown in fig. 5.

Reference numerals:

1. a cell heating coil; 10. an exciting coil; 20. an iron core; 21. a placement groove; 22. cutting a port; 23. a center column; 30. a battery cell.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, fig. 1 illustrates an exploded view of a cell heating coil 1 according to some embodiments of the present utility model.

The utility model provides a battery core heating coil 1, which comprises an exciting coil 10 and an iron core 20, wherein the iron core 20 is provided with a placing groove 21, the placing groove 21 is used for placing the exciting coil 10, and the iron core 20 is made of soft magnetic ferrite.

The electric core heating coil 1 provided by the utility model comprises the iron core 20 and the exciting coil 10 placed in the placing groove 21 of the iron core 20, wherein the iron core 20 is made of soft magnetic ferrite, the exciting coil 10 is mainly formed by coiling enamelled wires, and in order to facilitate processing and installation, the enamelled wires are coiled on a coil framework to form the exciting coil 10, and compared with silicon steel sheets used in the traditional technology, the soft magnetic ferrite has lower loss when the working frequency of the electric core heating coil 1 is higher, the performance is more stable and reliable, and the magnetic leakage can be reduced when the iron core 20 is surrounded outside the exciting coil 10, so that the magnetic field strength and the heating efficiency of the electric core heating coil 1 are improved; in addition, the ferrite core 20 is formed by sintering once, so that the cost is lower and the production cost can be reduced compared with the complex lamination process of the silicon steel sheet.

In some embodiments, core 20 has cut 22. Specifically, the cutting port 22 is opened in the wall of the core 20. The cut 22 can serve as a lead wire outlet of the exciting coil 10, and the led-out lead wire is used for communicating the exciting coil 10 with an external circuit, and the provision of the cut 22 can also reduce eddy current loss of the iron core 20.

Referring to fig. 2 and 3, fig. 2 shows a schematic structural view of an iron core 20 according to some embodiments of the present utility model, and fig. 3 shows a perspective view of an iron core 20 according to some embodiments of the present utility model, in which a cutting opening 22 is parallel to a sidewall of an axial penetration placement groove 21 of an exciting coil 10. Further, the cutting opening 22 penetrates the bottom and the side wall of the placement groove 21 in the radial direction of the exciting coil 10. In some embodiments, the cutting opening 22 is an opening that communicates the outside with the placement groove 21, i.e., an opening in the wall of the core 20.

In some embodiments, the exciting coil 10 is cylindrical, the core 20 is cylindrical, and the placement groove 21 is cylindrical.

Preferably, as shown in fig. 1, after the iron core 20 is provided with the placement groove 21, the solid portion of the iron core 20 forms a cylindrical structure, and the placement groove 21 is a closed groove, that is, a non-through groove with one end closed and one end open. The iron core 20 is sleeved outside the exciting coil 10, the magnetic leakage of the iron core 20 can be greatly reduced besides guiding a magnetic path, radiation outside the exciting coil 10 is shielded, and a magnetic field is restrained inside the iron core 20, so that heating efficiency is improved.

In some embodiments, the axial length of the iron core 20 is greater than the axial length of the exciting coil 10, and the iron core 20 can better surround the exciting coil 10, so as to reduce magnetic leakage. Preferably, the axial length of the iron core 20 is slightly longer than the length of the exciting coil 10, so that magnetic leakage is reduced, and heating efficiency is improved.

In some embodiments, the exciting coil 10 and the iron core 20 are mounted by gluing or interference fit, so as to facilitate movement and placement and prevent the exciting coil and the iron core from being separated.

In some embodiments, the cell heating coil 1 further includes at least one cover sheet detachably disposed at one or both end openings of the core 20. Specifically, the cover plate has a plate-like structure that is adapted to the shape of the opening of the placement groove 21, is provided at the opening of the placement groove 21, covers the internal structure, and can prevent dust from being deposited inside the iron core 20 or the exciting coil 10, and can prevent the exciting coil 10 from falling off from the iron core 20 when the electric core heating coil 1 is moved.

In some embodiments, as shown in fig. 1, the placement groove 21 is a closed groove, the exciting coil 10 may be directly placed in the placement groove 21, and one end of the opening of the placement groove 21 may be provided with a cover sheet.

In some embodiments, the placement groove 21 is a through groove, and after the exciting coil 10 is disposed in the placement groove 21, a cover plate is disposed at an opening at one end of the placement groove 21 or a cover plate is disposed at an opening at two ends of the placement groove, so that dust can be prevented and the exciting coil 10 can be prevented from falling off.

In some embodiments, core 20 does not have center leg 23, and the loss is still small compared to conventional silicon steel sheets, and providing center leg 23 can further reduce the loss.

Referring to fig. 1, 3 and 4, fig. 4 shows a schematic magnetic field diagram of an iron core 20 according to some embodiments of the present utility model, in which the iron core 20 is provided with a center post 23, the center post 23 is fixed in a placement groove 21, the iron core 20 is sleeved outside the exciting coil 10, and the exciting coil 10 is sleeved outside the center post 23. The center leg 23 serves to guide the magnetic circuit, further increases the magnetic field energy and reduces the loss of the core 20, and the magnetic density at the center of the exciting coil 10 is highest, so that the diameter of the center leg 23 at the center of the exciting coil 10 needs to be increased.

In some embodiments, the diameter of the center post 23 is slightly smaller than the inner diameter of the field coil 20. Preferably, the inner diameter of the exciting coil 10 is in transition fit with the center post 23, so that magnetic leakage can be further reduced, magnetic field energy is improved, heating efficiency is improved, and loss of the iron core 20 is reduced.

Specifically, the center post 23 is made of soft magnetic ferrite, and is made of the same material as the core 20. Specifically, the core 20 and the center post 23 are integrally formed.

The utility model also provides a battery cell 30 heating device, referring to fig. 5, fig. 5 shows a battery cell 30 heating device and a schematic diagram of a battery cell 30 according to some embodiments of the utility model, where the battery cell 30 heating device includes at least one electric cell heating coil 1 as described above, the electric cell heating coil 1 is disposed outside the battery cell 30 to be heated, the electric cell heating coils 1 are energized, and each electric cell heating coil 1 serves as a heating unit.

In some embodiments, the heating device for the battery cell 30 includes a mounting rack, the mounting rack is used for fixing each battery cell heating coil 1, when in use, the battery cell 30 is placed on the battery cell heating coil 1, the battery cell heating coil 1 is electrified, electromagnetic induction is generated, so that eddy currents are generated in the battery cell 30, and the battery cell 30 can be heated.

In some embodiments, the battery cells 30 are elongated rectangular bodies or structures similar to elongated rectangular bodies, and the cell heating coils 1 are disposed on two large battery faces of the battery cells 30, sandwiching the battery cells 30. It will be appreciated that in actual production, the battery cells 30 have part bumps or rounded edges, etc., which are not very regular flat moment bodies, but rather are shaped as elongated moment bodies. The two cell faces refer to the larger two surfaces formed by the long and wide sides of the battery cell 30. In some embodiments, the battery cells 30 are blade batteries.

Preferably, when the cell heating coils 1 are provided on both sides of the battery cell 30, the distance between the opposite cell heating coils 1 increases by a proper amount the movement gap based on the thickness of the battery cell 30.

Preferably, the cell heating coils 1 are uniformly arranged on both sides of the battery cells 30 so that the battery cells 30 are uniformly heated.

Referring to fig. 6, fig. 6 shows a front view of the structure shown in fig. 5. In some embodiments, a gap is formed between adjacent cell heating coils 1, so that the use safety is further ensured as a safety distance, the cell heating coils 1 are prevented from damaging the isolating film on the surface of the battery cell 30 or the battery cell 30 itself, and appropriate heat dissipation can be performed.

Of course, in some embodiments, the above-mentioned electric core heating coil 1 may be used for heating electric cores, and may be disposed on other metal objects to be heated for heating.

The electric core heating coil 1 provided by the utility model comprises the iron core 20 and the exciting coil 10 placed in the placing groove 21 of the iron core 20, wherein the iron core 20 is made of soft magnetic ferrite, compared with a silicon steel sheet used in the traditional technology, the hysteresis phenomenon of the soft magnetic ferrite consumes less energy and has higher resistivity, the energy loss generated by the iron core 20 is reduced due to eddy current, so that the electric core heating coil 1 has lower loss when the working frequency is higher, the performance of the electric core heating coil 1 is more stable and reliable, the iron core 20 is integrally provided with the center post 23, the center post 23 is fixed in the placing groove 21 to guide a magnetic circuit, the exciting coil 10 is sleeved outside the center post 23, and the iron core 20 is sleeved outside the exciting coil 10 in a surrounding manner, so that the iron core 20 can reduce magnetic leakage, the magnetic field strength and the heating efficiency of the electric core heating coil 1 are improved, the cutting opening 22 is formed in the wall of the iron core 20, and the eddy current loss can be further reduced by the cutting opening 22. According to the battery cell 30 heating device provided by the utility model, when in use, the battery cell 30 is placed between a plurality of fixed electrified cell heating coils 1, and electromagnetic induction is generated by the cell heating coils 1, so that eddy currents generated in the battery cell 30 are heated. In addition, the ferrite core 20 is formed by sintering once, compared with the complex lamination process of silicon steel sheets, the cost is lower, the efficiency is higher, and the production efficiency can be improved while the production cost is reduced. The above-mentioned electric core heating coil 1 has reduced the loss of iron core 20 when having improved heating efficiency, has prolonged electric core heating coil 1's life-span to improved battery electric core 30 heating device's heating efficiency and prolonged battery electric core 30 heating device's life, reached high-efficient and environmental protection win-win effect.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A cell heating coil, comprising:

an exciting coil; and

2. The cell heating coil of claim 1 wherein the core has a cut.

3. The cell heating coil of claim 2 wherein the cut-out is parallel to an axial direction of the field coil through a sidewall of the placement groove;

4. The electrical core heating coil of claim 1, wherein the field coil is cylindrical, the core is cylindrical, and the placement groove is cylindrical.

5. The electrical core heating coil of claim 4, wherein the axial length of the core is greater than the axial length of the field coil.

6. The electrical core heating coil of claim 1, wherein the field coil and the core are mounted by gluing or interference fit.

7. The electrical core heating coil of claim 1, wherein the core is provided with a center post, the center post is fixed in the placement groove, the core is sleeved outside the exciting coil, and the exciting coil is sleeved outside the center post.

8. The electrical core heating coil of claim 7, wherein the inner diameter of the field coil is in transition fit with the center post.

9. A cell heating device comprising at least one cell heating coil according to any one of claims 1-8, said cell heating coil being arranged outside a battery cell to be heated, said cell heating coil being energized.

10. The cell heating device of claim 9, wherein the battery cells are elongated rectangular or rectangular-like structures, the cell heating coils being disposed on two battery faces of the battery cells sandwiching the battery cells; the battery cell heating coils are uniformly distributed on two sides of the battery cell.