A battery heating fixture, a battery heating system, and a battery production line.

Abstract

This utility model belongs to the field of battery manufacturing technology, and discloses a battery heating fixture, a battery heating system, and a battery production line. The battery heating fixture includes a mounting component and an electromagnetic coil. The mounting component has a mounting chamber for inserting the component to be heated; the electromagnetic coil is sleeved on the outer periphery of the mounting component and is used to generate an alternating magnetic field passing through the component to be heated, thereby inducing eddy currents inside the component. This utility model enables internal preheating of the battery during the heating process, shortens the battery heating time, reduces the number of static storage spaces and avoids the occupation of static storage spaces, thus reducing operating costs.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery heating fixture, a battery heating system, and a battery production line. Background Technology

[0002] In the formation process of lithium-ion batteries, high-temperature settling is a key step to ensure battery performance. Its core function is to promote the full wetting of the separator and electrode by the electrolyte through a specific temperature environment, and to induce the stable reconstruction of the solid electrolyte interface film on the electrode surface.

[0003] Existing technical solutions generally adopt the overall workshop heating method, which uses ambient heat convection and heat radiation to heat up the battery modules.

[0004] However, current heating methods have the following problems. First, traditional heat conduction relies on air as a medium to transfer heat, resulting in uneven temperature gradient distribution inside the battery. The response time for the core area of ​​the battery to reach the target temperature is significantly slower than that of the surface. In addition, existing production lines need to be equipped with several times more static storage space than theoretically required, resulting in redundant occupation of effective factory space and increased operating costs. Utility Model Content

[0005] The purpose of this utility model is to provide a battery heating fixture, a battery heating system, and a battery production line, which can realize the preheating of the battery interior, shorten the battery heating time, reduce the number of static storage locations and avoid the occupation of static storage locations, thereby reducing operating costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery heating fixture, comprising:

[0008] The mounting component has a mounting chamber for inserting a battery;

[0009] An electromagnetic coil is sleeved on the outer periphery of the mounting component. The electromagnetic coil is used to generate an alternating magnetic field that passes through the battery, thereby causing eddy currents to be generated inside the battery.

[0010] A battery heating system includes multiple housings and a battery heating fixture as described in any of the above embodiments, wherein the housings have mounting cavities for accommodating the battery heating fixture.

[0011] The battery production line includes the battery heating system as described in the above scheme.

[0012] Beneficial effects:

[0013] In the first aspect of this utility model, the battery heating fixture utilizes the principle of electromagnetic induction to preheat the inside of the battery, thereby solving the problem in the prior art that the heating workshop heats the battery too slowly from the outside to the inside, shortening the heating time of the battery, thereby reducing the number of static storage locations, avoiding the occupation of static storage locations, and reducing operating costs.

[0014] In a second aspect of this utility model, the battery heating system based on the above-mentioned battery heating fixture can realize batch management of battery heating operations.

[0015] In a third aspect of this utility model, a battery production line based on the above-mentioned battery heating system can achieve rapid heating of the battery during the production process, thereby improving production efficiency and reducing production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the battery heating fixture provided in an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of the battery heating fixture with a hidden electromagnetic coil provided in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the multiple surrounding pressing members provided in the embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of a pressing member provided in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of another pressing component provided in an embodiment of the present utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the mounting component provided in this embodiment of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the battery heating fixture and the housing provided in this embodiment of the utility model.

[0023] Figure 8 This is a schematic diagram of the battery heating system provided in an embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of the battery heating system with a hidden housing provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 100. Shell; 200. Box;

[0027] 1. Mounting component; 11. Mounting chamber; 111. Inlet; 12. Limiting hole; 121. Limiting platform;

[0028] 2. Electromagnetic coil;

[0029] 3. Fixing component; 31. Pressing component; 311. Guide surface; 312. Contact surface; 313. Positioning groove; 32. Elastic component; 33. Limiting component;

[0030] 4. Spacer blocks. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] Please see the appendix Figure 1and attached Figure 2 The first aspect of this embodiment relates to a battery heating fixture (hereinafter referred to as the "fixture"). The fixture includes a mounting component 1 and an electromagnetic coil 2. The mounting component 1 is provided with a mounting chamber 11 for inserting a component to be heated; the electromagnetic coil 2 is sleeved on the outer periphery of the mounting component 1 and is used to generate an alternating magnetic field passing through the component to be heated, so as to generate eddy currents inside the component to be heated.

[0036] Specifically, the mounting component 1 is a columnar structure, including but not limited to polyhedral and cylindrical structures; in this embodiment, it is a long rectangular parallelepiped structure. All edges of the mounting component 1 are rounded. A columnar mounting chamber 11 is formed along the axial direction of the mounting component 1 (vertical direction in this embodiment). The shape and size of the mounting chamber 11 need to adapt to the shape and size of the component to be heated. In this embodiment, the component to be heated is a cylindrical battery; therefore, the mounting chamber 11 is cylindrical. The mounting chamber 11 can be a through-hole structure or a slot-shaped structure with one end open and the other closed, specifically designed to match the battery structure. In this embodiment, since the fixing component 3 is used to clamp and fix the battery, the mounting chamber 11 adopts a through-hole structure design, which can expand the battery's installation adaptability.

[0037] Furthermore, an electromagnetic coil 2 is sleeved or wound around the outer periphery of the mounting component 1. Alternating current is supplied to the electromagnetic coil 2 via a power supply system, causing it to generate a high-frequency changing magnetic field. This magnetic field's field lines pass through the battery. Since the battery itself is a conductive ferromagnetic material, eddy currents are generated inside the battery. These eddy currents generate heat within the battery, thus achieving preheating. The magnitude of the eddy currents can be comprehensively adjusted using electromagnetic control parameters such as the frequency and power of the magnetic field and the battery's magnetic reluctance. By setting appropriate electromagnetic control parameters, the battery can be rapidly heated to the target process temperature.

[0038] In this embodiment, the tooling can be adapted to the battery formation process. It can be placed in the static storage area of ​​the heating workshop to heat the exterior of the battery, specifically through heat convection and radiation. The tooling utilizes electromagnetic induction to preheat the battery's interior, thus solving the problem of slow heating from the outside to the inside in the heating workshop. This shortens the battery's heating time, reduces the number of static storage areas, avoids occupying these areas, and lowers operating costs.

[0039] Please see the appendix Figure 2 and attached Figure 3 Optionally, the battery heating fixture also includes a fixing component 3, which is disposed on the mounting component 1 and is used to abut against the battery.

[0040] Specifically, the fixing component 3 can have various structural forms. For example, it can be a fixing component 3 with a drive source, which drives the component to contact the battery, facilitating automation, but resulting in a complex, non-compact structure and increased cost. A fixing component 3 without a drive source simplifies the structure and ensures the compactness of the tooling. In this embodiment, since there are many static storage locations working simultaneously inside the heating workshop, using a fixing component 3 with a drive source would waste both space and energy. This embodiment uses an economical and compact fixing component 3 without a drive source to achieve the clamping and fixing of the battery.

[0041] In this embodiment, the fixing component 3 is used to clamp and fix the battery, so that the battery is stably placed in the mounting chamber 11, ensuring the accuracy and stability of the battery position, ensuring the consistency of the battery temperature rise, and ensuring the controllability of the battery temperature rise.

[0042] Furthermore, multiple fixing components 3 are arranged circumferentially along the mounting chamber 11.

[0043] Specifically, the fixing components 3 can be configured as a group, using the inner wall of the mounting chamber 11 to clamp the battery's outer wall at two functional locations, thus fixing the battery. A single fixing component 3 can reduce the number of parts in this battery heating fixture. Alternatively, the fixing components 3 can be configured as three groups, arranged circumferentially along the mounting chamber 11, thereby clamping the battery's outer wall at three functional locations to fix the battery. Using three fixing components 3 to clamp the battery, especially for cylindrical battery structures, can achieve better centering and ensure stable clamping. In this embodiment, four fixing components 3 are arranged circumferentially along the mounting chamber 11 to achieve contact at four positions on the battery's outer periphery, ensuring stability and reliability of battery fixing through multi-point clamping. Of course, in other embodiments, the number of fixing components 3 can be increased accordingly.

[0044] Furthermore, multiple fixing components 3 are evenly distributed along the circumference of the mounting chamber 11.

[0045] In this embodiment, four fixing components 3 are arranged at 90-degree intervals along the circumference of the mounting chamber 11, so that the four fixing components 3 are evenly distributed, so that the force on the four contact positions on the outer periphery of the battery is consistent, thereby achieving overall force balance on the battery and dispersing the squeezing effect more.

[0046] Please see the appendix Figure 2 - Appendix Figure 4 Optionally, the fixing component 3 includes a pressing member 31, which is floatingly connected to the mounting member 1 and abuts against the battery.

[0047] It should be noted that a floating connection is a connection method in the mechanical or engineering field that allows for a certain degree of relative displacement or freedom between two or more components in a specific direction (such as axial, radial, or angular). Floating connections can compensate for displacements caused by assembly errors, thermal expansion, vibration, or dynamic loads, avoiding stress concentration or structural damage caused by rigid connections, thereby improving the reliability and adaptability of the system. Furthermore, they can be appropriately moved according to the size and shape differences of the mating components, thus enhancing adaptability.

[0048] Floating connection structures come in various types, but typically involve elastomers or flexible bodies. Examples include end floating achieved through the compression and tension of springs to accommodate various floating fit scenarios; flexible elastic pads used to accommodate minute axial, radial, or circumferential displacements, thereby reducing friction and wear; standard structural components such as elastic pins to accommodate vibration and displacement compensation scenarios; and hydraulic or pneumatic floating components that provide support while also allowing for adaptive floating displacement, etc.

[0049] Specifically, the pressing member 31 is in direct contact with the battery. In the floating connection between the pressing member 31 and the mounting member 1, the floating direction of the pressing member 31 relative to the mounting member 1 can be set according to the contact part of the battery. For example, the pressing member 31 abuts against the top of the mounting member 1 and uses the bottom wall of the mounting member 1 to clamp and fix the battery. This method of clamping the battery end may cause the pressing member 31 to interfere with structures such as the terminal post, thereby causing the terminal post to be compressed and affecting the battery performance. In addition, the pressing member 31 is also prone to heat generation under the action of a magnetic field, thereby affecting the thermal management during the battery heating process.

[0050] In this embodiment, to accommodate the elongated structure of the battery, one side wall of the pressing member 31 contacts the outer peripheral wall of the battery, thereby achieving circumferential clamping and fixing of the battery. Four pressing members 31 are circumferentially floatingly connected to the mounting member 1, and the floating direction of the pressing members 31 is perpendicular to the internal axis of the mounting chamber 11.

[0051] In this embodiment, the pressing member 31 is floatingly connected to the mounting member 1. The four circumferentially arranged pressing members 31 form a variable clamping space, thereby realizing the clamping and fixing of various types and specifications of batteries (different types and specifications of batteries have different radial dimensions), improving the adaptability of this tooling and reducing costs.

[0052] Please see the appendix Figure 4 Optionally, the pressing member 31 is provided with a contact surface 312 that abuts against the battery, and the contact surface 312 is an arc surface.

[0053] In this embodiment, the surface of the pressing member 31 that faces the outer wall of the battery forms a contact surface 312. To accommodate the cylindrical battery, the contact surface 312 is a concave arc-shaped surface, thereby dispersing the local squeezing force on the battery during the clamping process and preventing the battery from deforming and affecting its performance.

[0054] Furthermore, the pressing member 31 is provided with a guide surface 311, which is inclined relative to the extension direction of the mounting chamber 11. The mounting chamber 11 includes an inlet 111 for inserting the component to be heated, and the guide surface 311 extends from the inlet 111 to the inside of the mounting chamber 11 toward the inside of the mounting member 1.

[0055] Specifically, the portion of the pressing member 31 near the inlet 111 is wedge-shaped, and the side of the wedge facing the inside of the mounting chamber 11 forms a guide surface 311. During the insertion of the battery into the mounting chamber 11, the guide surface 311 can be continuously compressed. The guide surface 311 can be an inclined plane or an inclined concave surface with a certain curvature. The junction between the guide surface 311 and the contact surface 312 is rounded to avoid scratching the battery during insertion.

[0056] In this embodiment, the guide surface 311 not only facilitates the smooth insertion of the battery into the mounting chamber 11, but also, in conjunction with the multiple guide surfaces 311 evenly arranged circumferentially, enables the battery to be aligned during the insertion process, which is beneficial for the battery to find its correct position during insertion and ensures that the battery can be fixed in the accurate position.

[0057] Please see the appendix Figure 2 and attached Figure 5 Optionally, the fixing component 3 also includes an elastic element 32, one end of which is connected to the surface of the pressing member 31 away from the battery, and the other end of which is connected to the mounting member 1.

[0058] Specifically, the elastic element 32 is a common spring, and the number of elastic elements 32 can be selected according to the magnitude of the clamping force. A positioning groove 313 for accommodating and positioning the elastic element 32 is provided on the back side of the pressing member 31, and the other end of the elastic element 32 abuts against the mounting member 1.

[0059] In this embodiment, the elastic element 32 can be used to make the pressing element 31 float, and the elastic element 32 can be used to easily control the magnitude of the clamping force, making the structure of the fixing component 3 simple and compact.

[0060] Please see the appendix Figure 2 and attached Figure 6 The mounting component 1 is provided with a limiting hole 12, and the pressing component 31 is slidably connected to the inner wall of the limiting hole 12.

[0061] It should be noted that a sliding connection refers to a connection method in which two or more components achieve relative linear or curvilinear movement through contact surfaces or sliding pairs. For example, a slide rail (fixed component) and a slider (moving component) are used in a concave-convex fit to prevent wobbling; the guide block (moving component) sleeved on the guide rod (fixed component) ensures the accuracy of the movement direction. In this embodiment, the pressing component 31 slides relative to the inner wall of the limiting hole 12 to achieve a sliding connection with the mounting component 1, thereby ensuring the stability and accuracy of the movement of the pressing component 31.

[0062] Specifically, the limiting holes 12 are respectively opened on the four side walls of the mounting part 1, and the limiting holes 12 are strip-shaped holes adapted to the pressing part 31, and the pressing part 31 can extend and retract within the limiting holes 12.

[0063] In this embodiment, the inner wall of the limiting hole 12 forms a sliding limiting structure that matches the pressing member 31, thereby providing guidance for the pressing member 31 during the sliding process and ensuring the stability and accuracy of the movement of the pressing member 31.

[0064] Those skilled in the art will understand that, where assembly conditions permit, the limiting hole 12 can also be replaced by a groove-shaped structure, which can also achieve the sliding guiding function of the pressing member 31.

[0065] Furthermore, a limiting platform 121 is protruding on the inner wall of the limiting hole 12, and the limiting platform 121 is used to abut against the pressing member 31.

[0066] In this embodiment, the inner wall of the limiting hole 12 near the mounting chamber 11 protrudes to form a limiting platform 121, and the elastic force of the elastic member 32 causes the end face of the pressing member 31 or the limiting structure adapted to be protruded on the pressing member 31 to abut.

[0067] By setting the limiting platform 121, the extreme movement distance of the pressing part 31 can be limited, preventing the pressing part 31 from coming out of the limiting hole 12, and also facilitating the assembly of the pressing part 31.

[0068] Please see the appendix Figure 2 and attached Figure 3 Optionally, the fixing component 3 also includes a limiting member 33, which is connected to the mounting member 1. One end of the elastic member 32 is connected to the end of the pressing member 31 near the limiting member 33, and the other end is connected to the limiting member 33.

[0069] The limiting member 33 includes, but is not limited to, plate-shaped members and block-shaped members. In this embodiment, it is a rectangular plate-shaped member, and four limiting members 33 are embedded on the four outer wall surfaces of the mounting member 1.

[0070] In this embodiment, the other end of the elastic member 32 directly abuts against the surface of the limiting member 33. The design of the limiting member 33 makes the assembly of the pressing member 31 and the elastic member 32 more convenient and improves the assembly efficiency. During the assembly process, the pressing member 31 is first inserted into the limiting hole 12, then the elastic member 32 is placed inside the positioning groove 313, and finally the limiting member 33 is embedded in the mounting member 1.

[0071] Optionally, the mounting chamber 11 is equipped with a sensor (not shown) for detecting battery temperature.

[0072] Specifically, a temperature sensor is used to detect the battery temperature. In this embodiment, the internal temperature of the battery is indirectly obtained by detecting the temperature on the outside of the battery and by using a simulated or fitted temperature reference curve. A target temperature is then set based on the temperature reference value on the outside of the battery. When the temperature value measured by the sensor reaches the target temperature, it can be determined or confirmed that the battery has completed the heating process.

[0073] In practice, the battery heating process can be divided into multiple stages. For example, the battery heating process includes a rapid heating stage and a stable heating stage. In each corresponding stage, a temperature sensor can detect whether the battery temperature has reached the corresponding target temperature, so that operators can promptly know the different stages of the battery heating process and perform corresponding operations.

[0074] Please see the appendix Figure 7 - Appendix Figure 9 The second aspect of this embodiment also relates to a battery heating system, which includes a plurality of housings 100 and more battery heating fixtures, wherein each housing 100 has a mounting cavity for accommodating the battery heating fixtures.

[0075] Specifically, the housing 100 is an open cubic structure with an internal mounting cavity. Multiple housings 100 are arranged in an array to achieve batch management of battery heating operations.

[0076] Furthermore, the battery heating system includes a housing 200, with multiple housings 100 placed inside the housing 200.

[0077] In this embodiment, the housing 200 is an open cubic structure, used to accommodate multiple housings 100. The housing 200 facilitates the neatness and tidiness of the wiring for the multiple battery heating fixtures. Based on the above battery heating fixtures, the battery heating system can shorten the heating time in batch battery production and improve the efficiency of batch battery production.

[0078] Please continue to refer to the appendix. Figure 1Multiple pads 4 are provided between the electromagnetic coil 2 and the bottom surface of the housing 100. By setting multiple pads 4 at different heights, the axial position of the electromagnetic coil 2 can be adjusted, improving the convenience of position adjustment.

[0079] The third aspect of this embodiment also relates to a battery production line, which includes the battery heating system described above.

[0080] Battery production lines based on the above battery heating system can achieve rapid heating of batteries during the production process, improve production efficiency, and reduce production costs.

[0081] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery heating fixture, characterized in that, include: Mounting component (1), wherein the mounting component (1) is provided with a mounting chamber (11) for inserting the component to be heated; An electromagnetic coil (2) is sleeved on the outer periphery of the mounting component (1). The electromagnetic coil (2) is used to generate an alternating magnetic field that passes through the component to be heated, so as to generate eddy currents inside the component to be heated.

2. The battery heating fixture according to claim 1, characterized in that, The battery heating fixture also includes a fixing component (3), which is disposed on the mounting component (1) and abuts against the component to be heated.

3. The battery heating fixture according to claim 2, characterized in that, The fixing component (3) includes a pressing member (31), which is floatingly connected to the mounting member (1) and abuts against the element to be heated.

4. The battery heating fixture according to claim 3, characterized in that, The fixing component (3) further includes an elastic element (32), one end of which is connected to one end of the pressing element (31), and the other end of which is connected to the mounting element (1).

5. The battery heating fixture according to claim 4, characterized in that, The fixing component (3) further includes a limiting member (33), which is connected to the mounting member (1). One end of the elastic member (32) is connected to the end of the pressing member (31) near the limiting member (33), and the other end is connected to the limiting member (33).

6. The battery heating fixture according to claim 3, characterized in that, The mounting component (1) is provided with a limiting hole (12), and the pressing component (31) is slidably connected to the inner wall of the limiting hole (12).

7. The battery heating fixture according to claim 6, characterized in that, A limiting platform (121) is provided on the inner wall of the limiting hole (12), and the limiting platform (121) is used to abut against the pressing member (31).

8. The battery heating fixture according to claim 2, characterized in that, Multiple of the fixing components (3) are arranged circumferentially along the mounting chamber (11).

9. The battery heating fixture according to claim 8, characterized in that, Multiple fixing components (3) are evenly distributed along the circumference of the mounting chamber (11).

10. The battery heating fixture according to claim 3, characterized in that, The pressing member (31) is provided with a guide surface (311), which is inclined relative to the extension direction of the mounting chamber (11). The mounting chamber (11) includes an inlet (111) for inserting the element to be heated. The guide surface (311) extends from the inlet (111) toward the interior of the mounting chamber (11) toward the interior of the mounting chamber (11).

11. The battery heating fixture according to claim 3, characterized in that, The pressing member (31) is provided with a contact surface (312) that abuts against the element to be heated, and the contact surface (312) is an arc surface.

12. The battery heating fixture according to claim 1, characterized in that, The installation chamber (11) is equipped with a sensor for detecting the temperature of the component to be heated.

13. A battery heating system, characterized in that, It includes a plurality of housings (100) and a battery heating fixture as claimed in any one of claims 1-12, wherein the housing (100) has a mounting cavity for receiving the battery heating fixture.

14. The battery heating system according to claim 13, characterized in that, The battery heating system also includes a housing (200), and a plurality of said housings (100) are placed inside the housing (200).

15. A battery production line, characterized in that, Includes the battery heating system as described in claim 13 or 14.

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