Needle winding, winding equipment, battery electrode cores, batteries and terminal equipment

Abstract

This disclosure relates to a winding needle, a winding device, a battery electrode core, a battery, and a terminal device. The winding needle includes a needle body with an air channel within it. The air channel forms an adsorption port on the surface of the needle body, and a negative pressure can be generated within the air channel to enable the adsorption port to have an adsorption force. This disclosure reduces the complexity and operational difficulty of the winding needle by using an integrated needle body. Furthermore, the needle body can generate an adsorption force through the air channel and the adsorption port. Therefore, when using this winding needle to wind the electrode core, the separator and electrode sheet, etc., can be adsorbed at the adsorption port to complete the positioning and fixation of the materials to be wound. This fixing method is simple and reliable, thereby further reducing the operational difficulty and improving the quality and winding efficiency of the electrode core.

Description

Technical Field

[0001] The present disclosure relates to the technical field of terminal equipment, and in particular to a winding needle, a winding device, a battery core, a battery and a terminal equipment. Background Art

[0002] With the advancement of science and technology, the functions of terminal devices are becoming more and more abundant, and the energy consumption is gradually increasing, so the requirements for battery life are getting higher and higher. The pole core in the battery affects the battery capacity, and the pole core is wound by winding the pole piece and diaphragm with a winding needle. The winding needle structure in the related technology is complex and difficult to operate, which affects the quality and winding efficiency of the pole core. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a winding needle, a winding device, a battery core, a battery and a terminal device to solve the defects in the related art.

[0004] According to the first aspect of the embodiment of the present disclosure, a winding needle is provided, including a winding needle body, wherein an air channel is provided in the winding needle body, wherein the air channel forms a suction port on the surface of the winding needle body, and negative pressure can be formed in the air channel so that the suction port has suction force.

[0005] In one embodiment, the airway is further provided with a pressure regulating port, and the pressure regulating port is used to be connected to a pressure regulating device to regulate the air pressure in the airway.

[0006] In one embodiment, the pressure regulating device is used to evacuate the gas and / or reduce the gas temperature.

[0007] In one embodiment, the air channel includes a first channel and a second channel, the first channel is connected to the adsorption port, and the second channel is connected to the pressure regulating port, wherein the diameter of the first channel is smaller than the diameter of the second channel.

[0008] In one embodiment, the winding needle body has an annular outer wall for contacting the object to be rolled and end walls respectively connected to both ends of the annular outer wall, wherein the suction port is arranged on the annular outer wall, and the pressure regulating port is arranged on the end wall.

[0009] In one embodiment, the cross-section of the annular outer wall is rectangular, and the adsorption port is arranged on the wide side of the rectangle.

[0010] In one embodiment, a rounded chamfer is provided between the wide side of the rectangle and the long side of the rectangle.

[0011] According to a second aspect of an embodiment of the present disclosure, there is provided a winding device comprising the winding needle described in the first aspect.

[0012] According to a third aspect of an embodiment of the present disclosure, a battery core is provided, wherein the battery core is prepared using the winding needle described in the first aspect or the winding device described in the second aspect.

[0013] In one embodiment, the battery core includes two layers of diaphragms and a pole piece disposed between the two layers of diaphragms. One end of the two layers of diaphragms are fitted and connected to form a starting position. During the preparation of the battery core, the starting position is adsorbed on the adsorption port of the winding needle.

[0014] In one embodiment, when the cross-section of the annular outer wall of the winding needle is rectangular, during the preparation of the battery core, the starting position is set on the wide side of the rectangle.

[0015] According to a fourth aspect of an embodiment of the present disclosure, a battery is provided, comprising the battery core described in the third aspect.

[0016] According to a fifth aspect of an embodiment of the present disclosure, there is provided a terminal device, comprising the battery according to the fourth aspect.

[0017] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0018] The present invention reduces the complexity and difficulty of operation of the winding needle by providing an integrated winding needle body, and the winding needle body can form an adsorption force through the airway and the adsorption port. Therefore, when using this winding needle to wind the pole core, the diaphragm and the pole piece to be wound can be adsorbed at the adsorption port to complete the positioning and fixation of the wound object. This fixing method is simple and reliable, which can further reduce the difficulty of operation and improve the quality of the pole core and the winding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] Figure 1 is a side view of a winding needle shown in an exemplary embodiment of the present disclosure;

[0021] Figure 2 It is a schematic diagram of the state of winding the pole core with a winding needle in the related art;

[0022] Figure 3 It is a schematic diagram of the state of a winding needle winding a pole core according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0024] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0025] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0026] First, combine with Figure 1 To Attachment Figure 3 , the structures of the winding needle, winding equipment, battery core, battery and terminal equipment provided by the present disclosure are introduced, wherein, Figure 1 is a side view of a winding needle shown in an exemplary embodiment of the present disclosure; Figure 2 It is a schematic diagram of the state of winding the pole core with a winding needle in the related art; Figure 3 It is a schematic diagram of the state of a winding needle winding a pole core according to an exemplary embodiment of the present disclosure.

[0027] In a first aspect, at least one embodiment of the present disclosure provides a winding needle, including a winding needle body 100, wherein an air channel is provided inside the winding needle body 100, wherein the air channel forms a suction port 101 on the surface of the winding needle body 100, and negative pressure can be formed inside the air channel so that the suction port 101 has suction force.

[0028] Among them, the winding needle body 100 can be cylindrical or plate-shaped, and the size of the winding needle body 100 can be designed according to the size requirements of the battery and the pole core, so that the pole core wound by the winding needle meets the size requirements. For example, if the pole core is plate-shaped, the winding needle body 100 can also be designed to be plate-shaped. For another example, if the pole core is columnar, the winding needle body 100 can also be designed to be columnar.

[0029] Among them, the negative pressure formed in the airway is relative to the air pressure of the environment in which the winding body is located. That is to say, when the air pressure in the airway is lower than the air pressure of the environment in which the winding body is located (for example, standard atmospheric pressure), negative pressure is formed. At this time, there is a pressure difference between the air pressure in the airway and the air pressure outside the airway, so the adsorption port 101 has an adsorption force, and the size of the above pressure difference determines the size of the adsorption force.

[0030] The air pressure in the airway can be adjusted through the suction port 101 to form a negative pressure in the airway. For example, the airway can be evacuated to a vacuum through the suction port 101. For another example, the air in the airway can be cooled through the suction port 101. It should be noted that when the suction port 101 is used for pressure adjustment and adsorption at the same time, the object to be rolled needs to be adsorbed on the suction port 101 quickly after the pressure adjustment to avoid the failure of the negative pressure.

[0031] The embodiment of the present disclosure reduces the complexity and operating difficulty of the winding needle by providing an integrated winding needle body 100, and the winding needle body 100 can form an adsorption force through the airway and the adsorption port 101. Therefore, when using this winding needle to wind the pole core, the diaphragm 301 and the pole piece 302 to be wound can be adsorbed at the adsorption port 101 to complete the positioning and fixation of the wound object. This fixing method is simple and reliable, which can further reduce the operating difficulty and improve the quality of the pole core and the winding efficiency.

[0032] In some embodiments of the present disclosure, the airway is further provided with a pressure regulating port, and the pressure regulating port is used to be connected to a pressure regulating device to regulate the air pressure in the airway.

[0033] The pressure regulating device can be used to evacuate and / or reduce the gas temperature. By setting a pressure regulating port and cooperating with the pressure regulating device to adjust the pressure, the object to be rolled can be first attached to the suction port 101 during operation, and then the airway can be adjusted to a negative pressure through the pressure regulating port, thereby ensuring the negative pressure effect and making the operation more convenient.

[0034] In some embodiments of the present disclosure, the air channel includes a first channel 102 and a second channel 103, wherein the first channel 102 is in communication with the adsorption port 101, and the second channel 103 is in communication with the pressure regulating port, wherein the diameter of the first channel 102 is smaller than the diameter of the second channel 103. By providing two channels with different inner diameters, the diameter of the first channel 102 at the adsorption port 101 can be made smaller, thereby further strengthening the adsorption effect caused by the negative pressure, and the diameter of the second channel 103 at the pressure regulating port can be made larger, which facilitates the pressure regulating operation and improves the pressure regulating efficiency and quality.

[0035] In some embodiments of the present disclosure, the winding needle body 100 has an annular outer wall for contacting the object to be rolled and end walls 104 respectively connected to both ends of the annular outer wall, wherein the suction port 101 is arranged on the annular outer wall, and the pressure regulating port is arranged on the end wall 104.

[0036] The cross section of the annular outer wall (i.e., the surface of the end wall 104) can be square, rectangular, circular, elliptical, etc. The diaphragm 301 and the pole piece 302 are wound layer by layer on the annular outer wall to complete the winding. According to the size design of the pole core, the axial length of the annular outer wall (i.e., the length of the winding needle body 100) can be 15-25 cm.

[0037] In the embodiment of the present disclosure, by setting the adsorption port 101 on the annular outer wall, the starting position 303 of the object to be rolled can be adsorbed on the annular outer wall, thereby facilitating the winding of the object to be rolled, and the pressure regulating port is set on the end wall 104, which is not only convenient for connection with the pressure regulating device, but also can continuously regulate the pressure while winding, thereby further ensuring the negative pressure effect of the airway.

[0038] In some embodiments of the present disclosure, the cross-section of the annular outer wall is rectangular, and the suction port 101 is disposed on the wide side of the rectangle.

[0039] By setting the cross section of the annular outer wall (i.e., the surface of the end wall 104) to be rectangular, the entire winding needle body 100 can be plate-shaped, so the thickness of the pole core can be reduced. As mentioned above, the axial direction of the annular outer wall is the length direction of the winding needle body 100, the long side of the rectangle is the width direction of the winding needle body 100, and the wide side of the rectangle is the thickness direction of the winding needle body 100. According to the size design of the pole core, the long side of the rectangle can be set to 1cm-10cm, and the wide side of the rectangle can be set to be less than 0.8cm.

[0040] The suction port 101 is disposed on the wide side of the rectangle, that is, the suction port 101 is disposed on the side wall in the thickness direction of the plate-shaped winding needle body 100, so that the starting position 303 of the object to be wound can be adsorbed on the wide side of the rectangle (that is, the side wall in the thickness direction of the plate-shaped winding needle body 100). When the object to be wound is a diaphragm 301 and a pole piece 302, the pole piece 302 is disposed between the two layers of diaphragms 301, and the two layers of diaphragms 301 are in contact with each other at the starting position 303 (that is, no pole piece 302 is disposed between the two layers of diaphragms 301), so the thickness of the starting position 303 is different from that of other parts. The starting position 303 is disposed on the side wall in the thickness direction, and the thickness of the wound pole core is more uniform, thereby avoiding the problem of uneven thickness and low energy density of the pole core wound by the split winding needle in the related art. Specifically, in the related art, the state of the split winding needle when winding the pole core is as follows: Figure 2As shown, two winding needles 201 clamp the diaphragms 301 on both sides, and then after the two layers of diaphragms 301 are wound from one surface to the other, a pole piece 302 is placed between the two diaphragms 301, and the winding continues. Therefore, there is a part of the diaphragm 301 without the pole piece 302 on a certain surface, and this part of the diaphragm 301 does not cover the entire surface, so the thickness of the pole core formed by winding is uneven and the energy density is low. The state of the pole core when the winding needle of the present application is wound is as follows Figure 3 As shown, the two layers of diaphragm 301 at the starting position 303 are bonded to each other (for example, by hot-melt bonding) and then attached to the adsorption port 101 on the side wall of the winding needle body 100, and then the airway pressure is adjusted to form a negative pressure, so that the two layers of diaphragm 301 at the starting position 303 are adsorbed on the side wall, and then wrapped around any surface of the winding needle body 100, and the pole piece 302 is placed between the two layers of diaphragm 301 and the winding is continued. Therefore, only the diaphragm 301 without the pole piece 302 exists on the side wall, and the length is shorter than that of the diaphragm 301 without the pole piece 302 in the above-mentioned related technology, so that the thickness of the pole core formed by winding is uniform and the energy density is high.

[0041] In one example, a rounded chamfer is provided between the wide side of the rectangle and the long side of the rectangle. The rounded chamfer can facilitate the winding of the membrane 301 and the pole piece 302 to be wound, and can also avoid sharp corners that damage the wound object.

[0042] According to a second aspect of an embodiment of the present disclosure, there is provided a winding device comprising the winding needle described in the first aspect.

[0043] According to a third aspect of an embodiment of the present disclosure, a battery core is provided, wherein the battery core is prepared using the winding needle described in the first aspect or the winding device described in the second aspect.

[0044] Among them, the battery core includes two layers of diaphragms 301 and a pole piece 302 arranged between the two layers of diaphragms 301. One end of the two layers of diaphragms 301 are fitted and connected to form a starting position 303. During the preparation of the battery core, the starting position 303 is adsorbed on the adsorption port 101 of the winding needle.

[0045] Wherein, when the cross-section of the annular outer wall of the winding needle is rectangular, during the preparation of the battery core, the starting position 303 is set on the wide side of the rectangle.

[0046] The position of the above-mentioned starting position 303 during the preparation process has been introduced in detail when introducing the winding needle in the first aspect, and will not be repeated here.

[0047] According to a fourth aspect of the embodiments of the present disclosure, a battery is provided, comprising the battery core described in the third aspect, wherein the battery may be a lithium battery.

[0048] According to a fifth aspect of an embodiment of the present disclosure, there is provided a terminal device, comprising the battery according to the fourth aspect.

[0049] Among them, the terminal device can be a smart phone, a tablet computer, a desktop / laptop / handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) / virtual reality (VR) device, etc. The embodiments of the present disclosure are not intended to limit the specific form of the terminal device.

[0050] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0051] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A needle coil, characterized in that: It comprises a needle winding body, wherein an air channel is arranged in the needle winding body, wherein the air channel forms a suction port on the surface of the needle winding body, and negative pressure can be formed in the air channel so that the suction port has suction force; The airway is also provided with a pressure regulating port, which is used to connect with a pressure regulating device to adjust the air pressure in the airway; The winding needle body has an annular outer wall for contacting the object to be wound and end walls respectively connected to both ends of the annular outer wall, wherein the suction port is arranged on the annular outer wall, and the pressure regulating port is arranged on the end wall; The cross section of the annular outer wall is rectangular, and the adsorption port is arranged on the wide side of the rectangle.

2. The winding needle according to claim 1, characterized in that: The pressure regulating device is used for evacuating the gas and / or reducing the gas temperature.

3. The winding needle according to claim 1, characterized in that: The air channel includes a first channel and a second channel, the first channel is communicated with the adsorption port, and the second channel is communicated with the pressure regulating port, wherein a diameter of the first channel is smaller than a diameter of the second channel.

4. The winding needle according to claim 1, characterized in that: A rounded chamfer is provided between the wide side of the rectangle and the long side of the rectangle.

5. A winding device, characterized in that: The invention comprises the winding needle as claimed in any one of claims 1 to 4.

6. A battery core, characterized in that: The battery core is prepared using the winding needle described in any one of claims 1 to 4 or the winding device described in claim 5.

7. The battery core according to claim 6, characterized in that: The battery pole core comprises two layers of diaphragms and a pole piece disposed between the two layers of diaphragms. One end of the two layers of diaphragms are fitted and connected to form a starting position, and the starting position is adsorbed on the adsorption port of the winding needle.

8. The battery core according to claim 7, characterized in that: When the cross section of the annular outer wall of the winding needle is rectangular, the starting position is set on the wide side of the rectangle.

9. A battery, characterized in that: A battery core comprising the battery core according to any one of claims 6 to 8.

10. A terminal device, characterized in that: A battery comprising the battery of claim 9.

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