Battery cell winding device

Abstract

This application provides a battery cell winding device, comprising: a winding needle including a housing; multiple electromagnetic coils evenly distributed inside the housing, which can be electrically connected to an external power source; a temperature sensor located inside the housing; a controller connected to both the temperature sensor and the external power source; and a regulator connected to the controller. This application can improve the heating uniformity and heating efficiency during battery cell winding.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery cell winding device. Background Technology

[0002] In battery production, the cell winding process is one of the key steps, and the winding quality directly affects battery performance. To improve winding quality, heating is usually performed during cell winding. Existing winding heating methods include using an external heating source to heat the entire cell or placing heating rods inside the winding needles. The former method suffers from uneven heating and low efficiency, failing to accurately and effectively heat the inside of the cell. The latter method has drawbacks such as slow response speed and poor temperature control accuracy, and is prone to localized overheating or underheating, resulting in poor adhesion of materials inside the cell, which in turn affects the overall structural stability and performance consistency of the cell. Utility Model Content

[0003] In order to overcome the defects in the prior art, this utility model provides a battery cell winding device that can improve the heating uniformity and heating efficiency during battery cell winding.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model discloses a battery cell winding device, comprising:

[0006] The coiling needle includes a housing;

[0007] The electromagnetic coils are provided in multiple form, and the multiple electromagnetic coils are evenly distributed inside the housing. The multiple electromagnetic coils can be electrically connected to an external power source.

[0008] A temperature sensor, wherein the temperature sensor is disposed inside the housing;

[0009] A controller, which is connected to both the temperature sensor and an external power supply;

[0010] A regulator, which is connected to the controller.

[0011] This application achieves uniform heating of the entire winding needle by setting multiple uniformly distributed electromagnetic coils inside the casing and using electromagnetic induction heating. This avoids the problems of excessively high or low local temperatures and insufficient heating in traditional heating methods, ensuring uniform heating of the battery cell during winding. It also improves the bonding effect and consistency of the internal materials of the battery cell, thereby enhancing the overall performance and lifespan of the battery. In addition, electromagnetic induction heating has a fast response speed, which can quickly bring the winding needle to the preset temperature, shortening the heating time and improving production efficiency.

[0012] Furthermore, the electromagnetic coil contains a magnetic core. The combination of the magnetic core and the electromagnetic coil enhances the magnetic field strength and improves electromagnetic induction efficiency, thereby increasing both electrical energy conversion efficiency and heating efficiency.

[0013] Furthermore, at least two temperature sensors are provided, and these two temperature sensors are separately disposed inside the housing. Having at least two temperature sensors located at different positions within the housing allows for more accurate detection of the heating temperature of the winding needle. This avoids the situation where only one temperature sensor is used and fails, making it impossible to promptly confirm the heating temperature. This ensures the stability of heating during the battery cell winding process and further improves the quality and performance of the battery cell.

[0014] Furthermore, an insulating layer is provided on the outside of the electromagnetic coil to prevent short circuits that could prevent the coil from heating the needle.

[0015] Furthermore, the housing and the electromagnetic coil are integrally formed. By fixing the electromagnetic coil inside the housing through integral molding, the stability of the electromagnetic coil's fixation and heating can be guaranteed without considering the housing material and weight.

[0016] Furthermore, it also includes a power supply module, which comprises a rectifier circuit that can be connected to an external power source, an inverter circuit connected to the output of the rectifier circuit, and a filter circuit connected to the output of the inverter circuit. The rectifier circuit converts the AC power input from the external power source into DC power, and the inverter circuit converts the DC power into high-frequency AC power to meet the operating requirements of the electromagnetic coil. At the same time, the filter circuit removes noise and interference signals from the external power source, ensuring the stability and purity of the output current, thereby ensuring the stability and reliability of the electromagnetic coil when heating the needle.

[0017] Furthermore, it also includes clamping pins that pass through the housing. The clamping pins are used to clamp the diaphragm.

[0018] Furthermore, the housing has a through hole inside and a pin hole on the housing. The clamping pin passes through the through hole, and the housing is connected and fixed to the clamping pin by a pin that can pass through the pin hole.

[0019] Furthermore, the housing includes a first housing and a second housing. Each of the first housing and the second housing has a first groove on its opposite side, and the two first grooves surround the through hole. The sides of the first housing and / or the second housing have a second groove recessed towards the through hole. After the battery cell is wound, a device for holding the core is inserted into the second groove, thereby removing the core from the winding device.

[0020] Furthermore, the housing has multiple spaced-apart bosses inside, each boss having a connecting hole facing the clamping pin, and the connecting hole communicating with the pin hole. The bosses provide a more stable connection between the housing and the clamping pin, and the spaced-apart bosses create a cavity with the housing, thereby reducing the weight of the housing.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] This application achieves uniform heating of the entire winding needle by setting multiple uniformly distributed electromagnetic coils inside the casing and using electromagnetic induction heating. This avoids the problems of excessively high or low local temperatures and insufficient heating in traditional heating methods, ensuring uniform heating of the battery cell during winding. It also improves the bonding effect and consistency of the internal materials of the battery cell, thereby enhancing the overall performance and lifespan of the battery. In addition, electromagnetic induction heating has a fast response speed, which can quickly bring the winding needle to the preset temperature, shortening the heating time and improving production efficiency.

[0023] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural diagram of a battery cell winding device provided in an embodiment of this application;

[0026] Figure 2 This is an internal connection diagram of a battery cell winding device provided in an embodiment of this application;

[0027] Figure 3This is an internal structural diagram of a battery cell winding device provided in an embodiment of this application;

[0028] Figure 4 This is a partial view of a battery cell winding device provided in an embodiment of this application.

[0029] The reference numerals in the above figures are as follows: 1. Housing; 11. First housing; 12. Second housing; 2. Electromagnetic coil; 3. Clip; 4. Pin hole; 5. Boss; 6. First groove; 7. Second groove. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In addition, the accompanying drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as stated in advance.

[0031] In this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "forward," "backward," "between," "nearer," and "farthest" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for simplifying the description, 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. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0033] Reference Figures 1-4 As shown, this application provides a battery cell winding device, including a winding needle, an electromagnetic coil 2 disposed inside the winding needle, a temperature sensor disposed inside the winding needle, and a controller and regulator for adjusting the temperature.

[0034] Specifically, such as Figure 1 and Figure 2As shown, the winding needle includes a housing 1 and a clamping needle 3 inserted inside the housing 1. During operation, the battery cell is wound around the outside of the housing 1, and the clamping needle 3 clamps the diaphragm.

[0035] Optionally, the housing 1 is made of a metal material with good thermal conductivity and mechanical strength, such as aluminum alloy or stainless steel, to ensure that the heated temperature can be quickly transferred to the battery cell. The shape and size of the housing 1 can be flexibly set. In some embodiments, the cross-sectional shape of the housing 1 can be elliptical, circular, rhomboid, or other shapes.

[0036] In this embodiment, the housing 1 is cylindrical in shape. The housing 1 has a through hole inside and a pin hole 4 on the housing 1. The clamping pin 3 passes through the through hole. The housing 1 is connected and fixed to the clamping pin 3 by a pin that can pass through the pin hole 4.

[0037] In another possible embodiment, the housing 1 is also provided with a screw hole, and the housing 1 is connected and fixed to the clamp 3 by a bolt that can pass through the screw hole, so as to improve the connection stability of the housing 1.

[0038] The housing 1 includes a first housing 11 and a second housing 12. In the embodiments of this application, the first housing 11 and the second housing 12 have the same structure. The first housing 11 and the second housing 12 are each provided with a first groove 6 on their opposite sides. The two first grooves 6 surround and form a through hole. The side of the first housing 11 and / or the second housing 12 is provided with a second groove 7 that is recessed toward the through hole.

[0039] In some embodiments, at least one second groove 7 is provided so that after the battery cell winding is completed, the device for clamping the core can pass through the second groove 7, clamp the core, and thereby remove the core from the housing 1. Figure 1 As shown, in this embodiment, a second groove 7 is provided on the first housing 11 and the second housing 12 respectively.

[0040] The housing 1 has multiple spaced protrusions 5 inside, each with a connecting hole that communicates with a pin hole. This allows the pin to pass through the connecting hole and the pin hole, thus securing the housing 1 to the clamping needle 3 more firmly and improving the overall stability of the coiling needle. Furthermore, the multiple spaced protrusions 5 form a cavity with the housing 1, eliminating the need for a solid interior to fix the housing 1. This ensures the stability of the housing 1 while also reducing its weight.

[0041] The structure, number, and size of the boss 5 can be flexibly set. For example... Figure 3 As shown, in this embodiment, since a second groove 7 is provided on the side of the housing 1, the height of the boss on the side where the second groove 7 is provided is less than the height of the boss on the side where the second groove 7 is not provided.

[0042] Multiple electromagnetic coils 2 are provided and are evenly distributed inside the housing 1. All electromagnetic coils 2 are electrically connected to an external power source. When a high-frequency alternating current is input to the electromagnetic coil 2, the electromagnetic coil 2 generates an alternating magnetic field. This magnetic field induces a current inside the housing 1, causing the housing 1 to heat up rapidly.

[0043] In some embodiments, a plurality of electromagnetic coils 2 may be wound around the inner surface of the housing 1, or arranged vertically inside the housing 1, or distributed in a curved manner inside the housing 1, or uniformly arranged inside the housing 1 in other shapes and structures.

[0044] like Figure 2 , Figure 3 and Figure 4 As shown, multiple electromagnetic coils 2 are arranged in a long strip shape and evenly spaced inside the housing 1 to ensure that the housing 1 is heated evenly.

[0045] In one possible embodiment, the housing 1 is integrally formed with the electromagnetic coil 2.

[0046] In one possible embodiment, the electromagnetic coil 2 has a magnetic core inside to enhance the magnetic field strength.

[0047] In one possible embodiment, an insulating layer is provided on the outside of the electromagnetic coil 2. For example, an insulating coating may be provided on the outside of the electromagnetic coil 2.

[0048] Optionally, the electromagnetic coil 2 is made of a high-temperature resistant and highly conductive material to ensure that a stable and efficient magnetic field can be generated when a high-frequency current passes through it. The magnetic core is made of a high-permeability material to enhance the magnetic field strength and improve the electromagnetic induction efficiency.

[0049] The cell winding device in this embodiment further includes a power module, which includes a rectifier circuit connected to an external power source, an inverter circuit connected to the output terminal of the rectifier circuit, and a filter circuit connected to the output terminal of the inverter circuit, thereby making the power supply more stable and ensuring the stability and reliability of the heating process.

[0050] The temperature sensor is located inside the housing 1, while the controller and regulator can be located outside the housing 1. The temperature sensor can monitor the temperature change of the housing 1 in a timely manner and feed the temperature signal back to the controller. After receiving the feedback signal, the controller controls the regulator to adjust the current.

[0051] Optionally, the controller is an existing microprocessor, and the regulator is a silicon controlled rectifier voltage regulator module or other electronic components capable of power regulation. The heating temperature is controlled by changing the current of the input electromagnetic coil 2, ensuring that the heating temperature of the housing 1 is always kept within the preset range.

[0052] Optionally, the temperature sensor may be a thermocouple, a thermistor, or another high-precision temperature sensing element.

[0053] In this embodiment, two temperature sensors are provided. One temperature sensor is located near the center of the housing 1, and the other temperature sensor is located at any position inside the housing 1. In other possible embodiments, a greater number of temperature sensors may be provided, which is not specifically limited herein.

[0054] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. An electrode core winding device characterized by comprising: include: The coiling needle includes a housing; The electromagnetic coils are provided in multiple form, and the multiple electromagnetic coils are evenly distributed inside the housing. The multiple electromagnetic coils can be electrically connected to an external power source. A temperature sensor, wherein the temperature sensor is disposed inside the housing; A controller, which is connected to both the temperature sensor and an external power supply; A regulator, which is connected to the controller.

2. The cell winding apparatus according to claim 1, wherein The electromagnetic coil has a magnetic core inside.

3. The cell winding apparatus according to claim 1, wherein At least two temperature sensors are provided, and the at least two temperature sensors are separately disposed inside the housing.

4. The battery cell winding device according to claim 1, characterized in that, The electromagnetic coil is provided with an insulating layer on the outside.

5. The cell winding apparatus according to claim 1, wherein The housing is integrally formed with the electromagnetic coil.

6. The cell winding apparatus according to claim 1, wherein It also includes a power supply module, which includes a rectifier circuit that can be connected to an external power source, an inverter circuit connected to the output terminal of the rectifier circuit, and a filter circuit connected to the output terminal of the inverter circuit.

7. The cell winding apparatus according to claim 1, wherein It also includes a clamping pin, which passes through the housing.

8. The cell winding apparatus according to claim 7, wherein The housing has a through hole inside and a pin hole on the housing. The clamping pin passes through the through hole, and the housing is connected and fixed to the clamping pin by a pin that can pass through the pin hole.

9. The cell winding apparatus according to claim 8, wherein The housing includes a first housing and a second housing. The first housing and the second housing are each provided with a first groove on the opposite side. The two first grooves surround the through hole. The side of the first housing and / or the second housing is provided with a second groove that is recessed toward the through hole.

10. The cell winding apparatus according to claim 8, wherein The housing has multiple spaced protrusions inside, and each protrusion has a connecting hole facing the clamping pin. The connecting hole communicates with the pin hole.

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