Battery cell heating device and battery cell production equipment

Abstract

The utility model relates to the technical field of battery manufacturing, and provides a battery cell heating device and battery cell production equipment, the battery cell heating device comprises a heating assembly and a battery cell jig, the heating assembly comprises two coil assemblies which are arranged at intervals along a first direction, each coil assembly comprises a magnetic conductive part and four coils, the coils are connected to the connecting ends of the magnetic conductive parts, and the magnetic conductive parts are connected with the battery cell jig. In the same coil assembly, the four coils are distributed at four corners, the first edges and the second edges of the battery cells intersect with the arrangement direction of the adjacent coils, during heating, the four coils in each coil assembly can correspondingly cover the four edges and / or the parts near the edges of the battery cells, so that heating is carried out, and a formed magnetic field can also heat the middle parts of the battery cells; moreover, when the battery cell is changed, the four coils in each coil assembly still respectively cover the edge and / or the part near the edge of the battery cell, so that uniform heating is realized, the number or position of the coils of the battery cell heating device does not need to be changed, and the compatibility of the battery cells with different sizes is improved.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing, in particular to a battery core heating device and battery core production equipment. Background Art

[0002] In the battery production process, commonly used electromagnetic heating devices are used in conjunction with battery cells of fixed structure / appearance size. When changing to battery cells of different sizes (for example, different sizes), different electromagnetic heating devices need to be replaced, or the number or installation position of the electromagnetic heating devices needs to be adjusted, resulting in reduced heating efficiency or poor heating uniformity. It is difficult to meet the heating requirements of the battery cells in related production links, affecting product quality. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery core heating device that is compatible with battery cores of different sizes.

[0004] The utility model also provides a battery core production device having the battery core heating device.

[0005] According to the first aspect of the present invention, the battery core heating device includes a heating component and a battery core fixture, wherein the heating component includes two coil components spaced apart along a first direction, and a heating space is formed between the two coil components; the battery core fixture is used to carry the battery core in the heating space, and the battery core has two opposite first edges and two opposite second edges, and the first edges are perpendicular to the second edges, wherein:

[0006] Each of the coil assemblies comprises a magnetic conductive member having a connection end and four coils, the coils being connected to the connection end, and along the first direction, the connection ends on each of the magnetic conductive members in the two coil assemblies correspond to each other and can form a magnetic circuit to electromagnetically heat the electric core located in the heating space;

[0007] In the same coil assembly, the four coils are distributed at four corners, and the arrangement directions of adjacent coils intersect with the first edge and the second edge respectively and are perpendicular to the first direction.

[0008] The battery cell heating device of the embodiment of the utility model has at least the following beneficial effects: when the battery cell heating device is working, the four coils distributed in four corners in the two coil assemblies correspond to each other and can form a magnetic field covering the heating space. During heating, the first edge and the second edge of the battery cell intersect with the arrangement direction of the adjacent coils, and are thus carried on the battery cell fixture at an angle. In the heating space, the four coils in each group of coil assemblies can correspond to cover the four edges and / or parts near the edges of the battery cell, thereby heating the battery cell. The formed magnetic field can also heat the middle part of the battery cell. Moreover, when the battery cell is replaced, the four coils in each group of coil assemblies still respectively cover the edges and / or parts near the edges of the battery cell, thereby achieving uniform heating. Therefore, there is no need to change the number or position of the coils of the battery cell heating device, thereby improving the compatibility of battery cells of different sizes.

[0009] According to some embodiments of the electric core heating device of the utility model, each of the coil assemblies includes two magnetic conductive parts, each of the magnetic conductive parts includes a skeleton and two connecting ends connected to the skeleton, the two connecting ends are spaced apart along a second direction, the second direction intersects with the first edge and the second edge respectively, and is perpendicular to the first direction.

[0010] According to some embodiments of the battery core heating device of the present invention, the skeleton extends along the second direction, the two skeletons are arranged in parallel and spaced apart along a third direction, the two connecting ends on the two skeletons are aligned one by one along the third direction, and the third direction is parallel to the second direction and perpendicular to the first direction.

[0011] According to some embodiments of the electric core heating device of the utility model, each of the coil assemblies includes four magnetic conductive parts. In the same coil assembly, the four magnetic conductive parts are arranged in two rows, and each row includes two magnetic conductive parts arranged at intervals along the second direction. Each of the magnetic conductive parts includes a skeleton and a connecting end connected to the skeleton. The second direction intersects with the first edge and the second edge respectively, and is perpendicular to the first direction.

[0012] According to some embodiments of the electric core heating device of the present invention, the two rows of magnetic conductive parts are arranged in parallel and spaced apart along a third direction, the magnetic conductive parts are aligned one by one along the third direction, and the third direction is parallel to the second direction and perpendicular to the first direction.

[0013] According to some embodiments of the battery cell heating device of the present invention, the battery cell fixture includes a bearing portion and two first positioning portions connected to the bearing portion, the bearing portion is used to bear the battery cell, the two first positioning portions are spaced apart in a direction perpendicular to the first edge, a space for accommodating the battery cell is formed between the bearing portion and the first positioning portions, and the two first positioning portions are used to abut against the two first edges from both sides of the battery cell so that the first edges intersect with the arrangement direction of the coils.

[0014] According to some embodiments of the battery cell heating device of the present invention, the battery cell fixture also includes two second positioning portions spaced apart in a direction perpendicular to the second edge, the second positioning portions are connected to the bearing portion, and the two second positioning portions are used to abut against the two second edges from both sides of the battery cell so that the second edge intersects with the arrangement direction of the coil.

[0015] According to some embodiments of the utility model, the battery cell heating device further includes a mounting frame, the mounting frame includes two mounting seats spaced apart along the first direction and an adjustment mechanism connected to at least one of the mounting seats, the heating component is disposed between the two mounting seats, the two coil components are respectively connected to one of the mounting seats, and the adjustment mechanism is used to drive at least one of the mounting seats to move along the first direction to adjust the spacing between the two mounting seats along the first direction.

[0016] The battery cell production equipment according to the second aspect of the utility model comprises a processing device and the battery cell heating device described in the first aspect of the utility model, and the upstream station and / or downstream station of the processing device is provided with the battery cell heating device.

[0017] The battery cell production equipment of the embodiment of the utility model has at least the following beneficial effects: the battery cell heating device of the first embodiment mentioned above is arranged at the upstream station and / or downstream station of the processing device, which can improve the compatibility of the battery cell size and reduce the number of times the battery cell heating device needs to be stopped to replace when the battery cell is changed, so that the battery cell processing device can work continuously, which is beneficial to improving the efficiency of the battery cell production equipment.

[0018] The battery cell production equipment according to some embodiments of the utility model further includes a transfer device, which includes a driving mechanism and a clamping mechanism connected to the driving mechanism, the clamping mechanism is used to take out the battery cell, the driving mechanism is used to drive the clamping mechanism to move relative to the battery cell jig, and is used to transfer the battery cell to the battery cell jig and place it in any of the heating spaces, and is also used to move the battery cell out of the battery cell jig.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 A schematic diagram of a heating state of a battery cell heating device and a large battery cell according to an embodiment of the present application;

[0022] Figure 2 for Figure 1 Bottom view of

[0023] Figure 3 for Figure 1 A perspective schematic diagram of the example shown;

[0024] Figure 4 for Figure 3 A schematic diagram from another perspective;

[0025] Figure 5 A schematic diagram of a heating state of a battery cell heating device and a large battery cell according to another embodiment of the present application;

[0026] Figure 6 for Figure 5 A three-dimensional schematic diagram of a cell heating device in the example shown;

[0027] Figure 7 A schematic diagram of a heating state of a battery cell heating device and a long battery cell according to an embodiment of the present application;

[0028] Figure 8 for Figure 7 Bottom view of

[0029] Fig. 9 for Figure 7 A perspective schematic diagram of the example shown;

[0030] Fig.10 for Fig. 9 A schematic diagram from another perspective;

[0031] Fig.11 A schematic diagram of a heating state of a battery cell heating device and a small battery cell according to an embodiment of the present application;

[0032] Fig.12 for Fig.11 Bottom view of

[0033] Fig.13 for Fig.11 A perspective schematic diagram of the example shown;

[0034] Fig.14 for Fig.13 A schematic diagram from another perspective;

[0035] Fig.15 A schematic diagram of a battery cell heating device according to another embodiment of the present application, in which a battery cell fixture is illustrated;

[0036] Fig.16 This is a schematic diagram of a battery cell heating device according to another embodiment of the present application, in which a mounting base is illustrated.

[0037] Reference numerals:

[0038] Mounting seat 100;

[0039] Heating assembly 200;

[0040] Coil assembly 210; magnetic conductive member 211; connecting end 212; coil 213; heating space 214;

[0041] Battery cell 300; large surface 310; first edge 311; second edge 312; large battery cell 300a; long battery cell 300b; small battery cell 300c;

[0042] The battery cell fixture 400 ; the carrying portion 410 ; the first positioning portion 420 ; and the second positioning portion 430 . DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] Cell heating plays an important role in the battery manufacturing process and is used in multiple links in the production process, such as cell hot pressing, drying, cell activation, etc. Appropriate heating can ensure the drying of electrodes, cell activation, and effective control of battery thermal management, which is beneficial to improving battery performance and safety. However, the battery production process often faces the production needs of various cell sizes, which means that the heating process needs to change the structure, position, or number of coils of the heating device as the cell is changed, resulting in reduced heating efficiency or poor heating uniformity, making it difficult to meet the heating requirements of the cell in various production links, which will ultimately affect product quality.

[0049] The utility model proposes a battery cell heating device that is compatible with battery cells of different sizes and a battery cell production device having the battery cell heating device. The following is an introduction to the embodiments of the present application in conjunction with the accompanying drawings of the specification:

[0050] refer to Figures 1 to 4 The battery cell heating device of the first embodiment of the utility model comprises a heating component 200 and a battery cell 300 fixture, wherein the heating component 200 comprises two coil components 210 spaced apart along a first direction, and a heating space 214 is formed between the two coil components 210; each coil component 210 comprises a magnetic conductive member 211 having a connecting end 212 and four coils 213, and the coils 213 are connected to the connecting end 212, and along the first direction, the connecting ends 212 on each magnetic conductive member 211 in the two coil components 210 correspond to each other, and can form a magnetic circuit to electromagnetically heat the battery cell 300 located in the heating space 214; the battery cell 300 fixture is used to carry the battery cell 300 in the heating space 214, and the heating component 200 is used to electromagnetically heat the battery cell 300 on the battery cell 300 fixture, so as to achieve efficient and uniform heating effect of the battery cell 300.

[0051] The battery cell heating device of the embodiment of the utility model is suitable for heating various types of square battery cells 300 or battery cells 300 with an approximately square structure. The battery cell 300 has two opposite first edges 311 and two opposite second edges 312, and the first edge 311 is perpendicular to the second edge 312. It can be understood that the battery cell 300 is usually placed in the heating space 214 with the large surface 310 facing the coil 213, that is, the large surface 310 is perpendicular to the first direction, so that a larger area of ​​the battery cell 300 can be exposed to the magnetic field, and the electromagnetic induction principle can be better utilized, so that the battery cell 300 can better absorb electromagnetic energy and convert it into heat energy, thereby improving the heating efficiency. At the same time, it is also conducive to uniform heat distribution, avoiding local overheating or uneven heating of the battery cell 300. The four edges of the battery cell 300 along the plane where the large surface 310 is located are two opposite first edges 311 and two opposite second edges 312.

[0052] Among them, in the same coil assembly 210, the four coils 213 are distributed in four corners, and the arrangement directions of adjacent coils 213 intersect with the first edge 311 and the second edge 312 respectively, and are perpendicular to the first direction. Therefore, when the battery cell heating device is working, the four coils 213 distributed in the four corners in the two coil assemblies 210 correspond to each other, and can form a magnetic field covering the heating space 214. During heating, the first edge 311 and the second edge 312 of the battery cell 300 intersect with the arrangement directions of the adjacent coils 213, so that it is carried on the battery cell 300 fixture at an angle. In the heating space 214, the four coils 213 in each group of coil assemblies 210 can correspond to cover the four edges and / or parts near the edges of the battery cell 300, so as to heat it. The formed magnetic field can also heat the middle part of the battery cell 300, and when the battery cell 300 is changed, the four coils 213 in each group of coil assemblies 210 still cover the edges and / or parts near the edges of the battery cell 300 respectively to achieve uniform heating. Therefore, there is no need to change the number or position of the coils 213 of the battery cell heating device, thereby improving the compatibility of battery cells 300 of different sizes.

[0053] For example, from a top view, the coverage relationship between the four coils 213 in a set of coil components 210 and the large surface 310 of the battery core 300 is used as a reference. Figures 1 to 6 When the size of the battery cell 300 is large (referred to as a large battery cell 300a), the area of ​​the large surface 310 of the battery cell 300 is comparable to the area surrounded by the outer edges of the four coils 213. For example, the lengths of the first edge 311 and the second edge 312 of the battery cell 300 are equal to or slightly greater than or less than the maximum distance between the two opposite sides of the adjacent coils 213. The coils 213 can cover most of the middle area of ​​the battery cell 300, as well as the first edge 311 and the second edge 312 and part of the battery cell 300 area near them; Figures 7 to 10, when the first edge 311 of the battery cell 300 is longer and the second edge 312 is significantly shorter (which can be called a long battery cell 300b), the area of ​​the large surface 310 of the battery cell 300 is significantly smaller than the area surrounded by the outer edges of the four coils 213. For example, the length of the first edge 311 of the battery cell 300 is equal to or slightly greater than or slightly less than the maximum distance between the adjacent coils 213 on the opposite side, and the second edge 312 is significantly less than the maximum distance between the adjacent coils 213 on the opposite side, wherein the two coils 213 can cover the middle of the battery cell 300 and the two ends and the vicinity of the two ends of the battery cell 300 corresponding to the second edge 312, and the two sides and the vicinity of the first edge 311 can also be covered by the other two battery cells 300; refer to Figures 11 to 14 When the size of the battery cell 300 is small (it can be called a small battery cell 300c), the area of ​​the large surface 310 of the battery cell 300 is significantly smaller than the area enclosed by the outer edges of the four coils 213. For example, the length of the first edge 311 and the second edge 312 of the battery cell 300 is significantly smaller than the maximum distance between the opposite sides of the adjacent coils 213. The coil 213 can cover most of the middle area of ​​the battery cell 300, as well as part of the battery cell 300 area along the first edge 311 and the second edge 312 and their vicinity.

[0054] As an example, the above-mentioned slightly larger or slightly smaller can be understood as the size difference is not greater than the diameter of a single coil 213; the above-mentioned significantly smaller can be understood as the size exceeds the diameter of a single coil 213. As another example, the above-mentioned slightly larger or slightly smaller can be understood as the size difference is not greater than half of the maximum distance between adjacent coils 213 on the opposite side; the above-mentioned significantly smaller can be understood as the size difference exceeds half of the maximum distance between adjacent coils 213 on the opposite side.

[0055] The above-mentioned large battery cell 300a, long battery cell 300b and small battery cell 300c and the above-mentioned examples are representative embodiments cited to illustrate the compatibility of the battery cell heating device of the embodiment of the present application with battery cells 300 of different sizes, rather than as a limitation. The battery cell heating device of the embodiment of the present application can of course also be used to heat battery cells 300 of sizes between the above-mentioned large battery cell 300a, long battery cell 300b and small battery cell 300c. When the battery cell 300 is replaced, the four coils 213 in each group of coil assemblies 210 still respectively cover the edge and / or part near the edge of the battery cell 300 to achieve uniform heating. The four coils 213 can all play a heating role, thereby improving the heating efficiency.

[0056] refer to Figures 1 to 4In some embodiments, each coil assembly 210 includes two magnetic conductive parts 211, each magnetic conductive part 211 includes a skeleton and two connecting ends 212 connected to the skeleton, and the two connecting ends 212 are spaced apart along the second direction. Therefore, the coils 213 connected to the two connecting ends 212 are also spaced apart along the second direction. The second direction intersects with the first edge 311 and the second edge 312 respectively, and is perpendicular to the first direction. Therefore, the four coils 213 in each coil assembly 210 form a four-corner distribution, so that the magnetic field formed by the four coils 213 can pass through most of the middle area of ​​the large surface 310 of the battery core 300 and part of the four edges of the battery core 300 and their vicinity. Specifically, the skeleton extends along the second direction, the two skeletons are arranged in parallel and spaced apart along the third direction, the connection ends 212 on the two skeletons are aligned one by one along the third direction, the third direction is parallel to the second direction and perpendicular to the first direction, so that no matter whether it is two coils 213 adjacent to each other along the second direction or two coils 213 adjacent to each other along the third direction, their connection lines are arranged at an angle with the first edge 311 and the second edge 312 of the battery cell 300. In specific implementation, the angle can be set to 45°, or one of the angles α has a value range between 30° and 60°, for example, it can be 30°, 35°, 40°, 45°, 50°, 55°, 60° or any other value between 30° and 60°.

[0057] refer to Figure 5 and Figure 6 In some embodiments, each coil assembly 210 includes four magnetic conductive parts 211. In the same coil assembly 210, the four magnetic conductive parts 211 are arranged in two rows, and each row includes two magnetic conductive parts 211 arranged at intervals along the second direction. Each magnetic conductive part 211 includes a skeleton and a connecting end 212 connected to the skeleton. The second direction intersects with the first edge 311 and the second edge 312 respectively, and is perpendicular to the first direction. Therefore, the four coils 213 in each coil assembly 210 form a four-corner distribution, so that the magnetic field formed by the four coils 213 can pass through most of the middle area of ​​the large surface 310 of the battery core 300 and the four edges of the battery core 300 and some areas near them. Specifically, the two rows of magnetic conductive parts 211 are arranged in parallel and at intervals along the third direction, and the magnetic conductive parts 211 are aligned one by one along the third direction. The third direction is parallel to the second direction and perpendicular to the first direction. Therefore, whether it is two coils 213 adjacent to each other in the second direction or coils 213 adjacent to each other in the third direction, their connection lines are arranged at an angle with the first edge 311 and the second edge 312 of the battery cell 300. In a specific implementation, the angle can be set to 45°, or one of the angles β has a value range between 30° and 60°, for example, 30°, 35°, 40°, 45°, 50°, 55°, 60° or any other value between 30° and 60°.

[0058] refer to Fig.15 In some embodiments, the battery cell 300 fixture includes a carrying portion 410 and two first positioning portions 420 connected to the carrying portion 410, the carrying portion 410 is used to carry the battery cell 300, the two first positioning portions 420 are spaced apart in a direction perpendicular to the first edge 311, and a space for accommodating the battery cell 300 is formed between the carrying portion 410 and the first positioning portions 420, the two first positioning portions 420 are used to abut against the two first edges 311 from both sides of the battery cell 300, which can effectively locate the position of the first edge 311 of the battery cell 300 and fix the placement direction of the battery cell 300 so that the first edge 311 intersects with the arrangement direction of the coil 213. Furthermore, in some embodiments, the battery cell 300 fixture also includes two second positioning portions 430 spaced apart in a direction perpendicular to the second edge 312, the second positioning portions 430 are connected to the bearing portion 410, and the two second positioning portions 430 are used to abut the two second edges 312 from both sides of the battery cell 300, further positioning the second edge 312 of the battery cell 300 and fixing the placement direction of the battery cell 300, so that the second edge 312 intersects with the arrangement direction of the coil 213.

[0059] refer to Fig.16 In some embodiments, the battery cell heating device further includes a mounting frame, which is used for mounting the heating component 200. The mounting frame includes two mounting seats 100 spaced apart along a first direction and an adjustment mechanism connected to at least one mounting seat 100. The heating component 200 is disposed between the two mounting seats 100, and the two coil assemblies 210 are respectively connected to one mounting seat 100. The adjustment mechanism is used to drive at least one mounting seat 100 to move along the first direction to adjust the spacing between the two mounting seats 100 along the first direction. As a result, it is convenient to assemble and disassemble the two coil assemblies 210 of the heating component 200 on the mounting seat 100, and it is also convenient to load and unload the battery cell 300. And, in some cases, adjusting the spacing of the mounting seats 100 can also adjust the spacing between the two groups of coil assemblies 210, which helps to adjust the relative coils 213 to a better spacing range and improve the practicality of the device.

[0060] According to the battery cell production equipment of the second aspect embodiment of the utility model, it includes a processing device and a battery cell heating device of the first aspect embodiment, and the upstream station and / or downstream station of the processing device are provided with a battery cell heating device. The battery cell heating device of the first aspect embodiment is arranged at the upstream station and / or downstream station of the processing device, which can improve the compatibility of the size of the battery cell 300 and reduce the number of times the battery cell 300 needs to be stopped to replace the battery cell heating device when the battery cell 300 is changed, so that the battery cell 300 processing device can work continuously, which is conducive to improving the efficiency of the battery cell production equipment. The battery cell production equipment of the embodiment of the present application can be a lithium battery equipment used in the production and manufacturing process of lithium-ion batteries, can be a special machine including stand-alone equipment and integrated equipment, or can be a complete line that basically realizes fully automated production of a certain process, wherein the processing can be a device used for processing in one of the links, for example, it can be a hot pressing device, and the battery cell 300 can be preheated before hot pressing by arranging the above-mentioned battery cell heating device at the previous station of the hot pressing device.

[0061] In some embodiments, the battery cell production equipment also includes a transferring device, which includes a driving mechanism and a clamping mechanism connected to the driving mechanism, the clamping mechanism is used to take out the battery cell 300, and the driving mechanism is used to drive the clamping mechanism to move relative to the battery cell jig, and is used to transfer the battery cell 300 to the battery cell jig and place it in any heating space 214, and is also used to move the battery cell 300 from the battery cell jig to realize mechanized loading and unloading of the battery cell 300.

[0062] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery core heating device, characterized in that: It comprises a heating component and a battery fixture, wherein the heating component comprises two coil components spaced apart in a first direction, and a heating space is formed between the two coil components; the battery fixture is used to carry the battery in the heating space, and the battery has two opposite first edges and two opposite second edges, and the first edges are perpendicular to the second edges, wherein: Each of the coil assemblies comprises a magnetic conductive member having a connection end and four coils, the coils being connected to the connection end, and along the first direction, the connection ends on each of the magnetic conductive members in the two coil assemblies correspond to each other and can form a magnetic circuit to electromagnetically heat the electric core located in the heating space; In the same coil assembly, the four coils are distributed at four corners, and the arrangement directions of adjacent coils intersect with the first edge and the second edge respectively and are perpendicular to the first direction.

2. The electric core heating device according to claim 1, characterized in that: Each of the coil assemblies includes two magnetic conductive parts, each of the magnetic conductive parts includes a skeleton and two connecting ends connected to the skeleton, the two connecting ends are spaced apart along a second direction, the second direction intersects with the first edge and the second edge respectively, and is perpendicular to the first direction.

3. The electric core heating device according to claim 2, characterized in that: The skeleton extends along the second direction, the two skeletons are arranged in parallel and spaced apart along a third direction, the two connecting ends on the two skeletons are aligned one by one along the third direction, and the third direction is parallel to the second direction and perpendicular to the first direction.

4. The electric core heating device according to claim 1, characterized in that: Each of the coil assemblies includes four magnetic conductive parts. In the same coil assembly, the four magnetic conductive parts are arranged in two rows, each row includes two magnetic conductive parts arranged at intervals along the second direction, each of the magnetic conductive parts includes a skeleton and a connecting end connected to the skeleton, and the second direction intersects with the first edge and the second edge respectively, and is perpendicular to the first direction.

5. The electric core heating device according to claim 4, characterized in that: The two rows of magnetic conductive members are arranged in parallel and spaced apart along a third direction, and the magnetic conductive members are aligned one by one along the third direction. The third direction is parallel to the second direction and perpendicular to the first direction.

6. The electric core heating device according to claim 1, characterized in that: The battery cell fixture includes a carrying portion and two first positioning portions connected to the carrying portion, the carrying portion is used to carry the battery cell, the two first positioning portions are spaced apart in a direction perpendicular to the first edge, a space for accommodating the battery cell is formed between the carrying portion and the first positioning portions, and the two first positioning portions are used to abut against the two first edges from both sides of the battery cell so that the first edge intersects with the arrangement direction of the coil.

7. The electric core heating device according to claim 6, characterized in that: The battery cell fixture also includes two second positioning portions spaced apart in a direction perpendicular to the second edge, the second positioning portions are connected to the bearing portion, and the two second positioning portions are used to abut against the two second edges from both sides of the battery cell so that the second edge intersects with the arrangement direction of the coil.

8. The electric core heating device according to any one of claims 1 to 7, characterized in that: It also includes a mounting frame, which includes two mounting seats spaced apart along the first direction and an adjustment mechanism connected to at least one of the mounting seats, the heating component is arranged between the two mounting seats, the two coil components are respectively connected to one of the mounting seats, and the adjustment mechanism is used to drive at least one of the mounting seats to move along the first direction to adjust the spacing between the two mounting seats along the first direction.

9. A battery cell production device, characterized in that: It comprises a processing device and a battery core heating device as claimed in any one of claims 1 to 8, wherein the battery core heating device is provided at an upstream station and / or a downstream station of the processing device.

10. The battery cell production equipment according to claim 9, characterized in that: It also includes a transfer device, which includes a driving mechanism and a clamping mechanism connected to the driving mechanism, the clamping mechanism is used to take out the battery cell, the driving mechanism is used to drive the clamping mechanism to move relative to the battery cell fixture, and is used to transfer the battery cell to the battery cell fixture and place it in any of the heating spaces, and is also used to remove the battery cell from the battery cell fixture.

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