Battery cell, battery device, power consuming device, and winding device

Abstract

This application discloses a battery cell, a battery device, an electrical device, and a winding device, relating to the field of battery technology. The battery cell includes a sleeve and a roll. The sleeve has a through hole, and its periphery has a clearance gap communicating with the through hole. The inner wall of the through hole has at least one bend structure configured as a positioning and snap-fit ​​structure. The roll is wound around the periphery of the sleeve and includes a positive electrode sheet, a separator, and a negative electrode sheet stacked together. The separator is disposed between the positive and negative electrode sheets, and one end of the separator passes through the clearance gap. The technical solution provided by this application aims to improve the structural stability and reliability of the battery device.

Description

Technical Field

[0001] The embodiments in this application relate to the field of battery technology, and in particular to a battery cell, a battery device, an electrical device, and a winding device. Background Technology

[0002] In related technologies, a battery cell can be formed into a cylindrical, prismatic, or other cylindrical shape by winding a separator and electrode sheets. The battery cell can usually be manufactured using a winding device, and multiple battery cells can be used together to form a battery device.

[0003] However, poor winding quality of battery cells makes them prone to deformation, affecting their lifespan and safety, and reducing the structural stability and reliability of the battery device. Utility Model Content

[0004] The purpose of this application is to provide a battery cell, a battery device, an electrical device, and a winding device, which aim to improve the structural stability and reliability of the battery device.

[0005] One embodiment of this application proposes a battery cell comprising a sleeve and a roll. The sleeve has a through hole, and a clearance slit communicating with the through hole is provided on the periphery of the sleeve. The inner wall of the through hole has at least one bend structure, which is configured as a positioning and snap-fit ​​structure. The roll is wound around the periphery of the sleeve. The roll includes a positive electrode sheet, a separator, and a negative electrode sheet stacked together. The separator is disposed between the positive electrode sheet and the negative electrode sheet, and one end of the separator passes through the clearance slit.

[0006] The technical solution of this application, by winding the roll material around the outer periphery of the sleeve and allowing one end of the diaphragm to pass through an avoidance gap for the winding needle to clamp, utilizes the sleeve to form an integral support structure for the battery cell, effectively preventing the roll material from collapsing into the through hole under stress and avoiding deformation of the battery cell. Simultaneously, at least one bend structure is formed on the inner wall of the through hole. During the battery cell winding process, the winding needle engages with the bend structure, allowing the winding needle to stably drive the sleeve to rotate and wind the roll material, effectively preventing slippage during winding and ensuring the roll material is stably and securely wound around the outer periphery of the sleeve, preventing wrinkling. This results in better structural stability and reliability for the battery cell, optimizes the battery cell manufacturing process, and improves the battery cell yield.

[0007] In one embodiment, the sleeve includes a cylindrical body and a sealing block. The cylindrical body has a through hole, and the periphery of the cylindrical body has a relief groove communicating with the through hole. The relief groove has a first groove wall and a second groove wall spaced apart and side by side. The sealing block is disposed in the relief groove. One side of the sealing block abuts against or connects with the first groove wall, and the other side of the sealing block is spaced apart from the second groove wall to form the relief gap.

[0008] By adopting the above method, the separate sleeve structure can better improve the production convenience of battery cells and ensure the overall structural strength of the sleeve, so that the sleeve can stably support the roll material and improve the overall structural stability and reliability of the battery cells.

[0009] In one embodiment, the sleeve further includes a hinge structure connecting the sealing block and the cylinder, wherein the sealing block is rotatably disposed relative to the cylinder.

[0010] By adopting the above method and using a hinged structure to achieve a rotating connection between the sealing block and the cylinder, it is more convenient to operate the sealing block to open or close the clearance groove, thereby improving the operational convenience of battery cell processing and production.

[0011] In one embodiment, the roll is wound from the first groove wall toward the second groove wall.

[0012] By adopting the above method, the stable winding of the coil on the sleeve can be ensured, the coil can be prevented from pushing the sealing block to open the clearance groove, and the operational convenience and reliability of battery cell processing and production can be improved.

[0013] In one embodiment, the distance between the first groove wall and the second groove wall gradually increases along the direction from the central axis of the through hole to the outer periphery of the cylinder, and the cross-sectional shape of the sealing block matches the cross-sectional shape of the clearance groove.

[0014] By using the above method, the sealing block can be stably fitted into the relief groove. The inner wall of the relief groove limits the sealing block, effectively preventing the sealing block from moving towards the through hole under force, ensuring the integrity of the overall structure, and allowing the sleeve to stably support the roll material.

[0015] In one embodiment, the width of the clearance gap is W, 0.5mm ≤ W ≤ 2mm. And / or, the diameter of the through hole is R1, 3mm ≤ R1 ≤ 10mm. And / or, the outer diameter of the sleeve is R2, 4mm ≤ R2 ≤ 11mm.

[0016] By adopting the above method, the heat dissipation and wetting effect of the battery cells can be better improved by avoiding gaps; and the overall structure of the sleeve can be made more stable, ensuring the support of the sleeve for the roll material.

[0017] This application also proposes a battery device comprising a battery cell as described in any of the foregoing embodiments.

[0018] This application also proposes an electrical device, including a battery device as described in any of the foregoing embodiments.

[0019] By using the battery device described in the preceding embodiments of this application in an electrical device, the battery capacity of the electrical device can be increased, which is beneficial to improving the battery life and voltage.

[0020] This application also proposes a winding device configured to manufacture the battery device in any of the foregoing embodiments. The winding device includes a support frame, a winding needle, and a driving device. The winding needle is rotatably connected to the support frame and can clamp the roll of battery cell material. The driving device is movably configured to drive the sleeve of the battery cell to move and engage with the winding needle, and can drive the sleeve and the winding needle to rotate synchronously.

[0021] By adopting the above solution, precise docking and synchronous rotation of the sleeve and the winding needle can be achieved, reducing the difficulty of winding the roll material and the risks of slippage and wrinkling. At the same time, the separation of the sleeve and the winding needle for material feeding can better prevent the roll material from being pulled away and deviated, ensuring the production and processing quality of the battery device. Furthermore, the winding device can be used to better realize the automated production of the battery device, improve the production efficiency of the battery device, and effectively improve the practicality and reliability of the winding device.

[0022] In one embodiment, the support frame includes a first upright and a second upright, which are spaced apart. The winding needle is rotatably connected to the first upright, and the second upright is provided with an insertion hole opposite to the winding needle. The insertion hole is configured to allow the sleeve of the battery cell to pass through.

[0023] By using the above method, the sleeve and the winding needle can be precisely connected using the insertion hole, reducing the offset when the drive device moves the sleeve, and further improving the practicality and structural reliability of the winding device.

[0024] In one embodiment, the winding device includes three winding needles, which are connected to the support frame at intervals and are rotatably arranged.

[0025] By using the above method, three winding needles can be used to achieve alternating operation of battery cell winding and unloading, thereby improving the production efficiency of the winding device.

[0026] In one embodiment, the support frame includes a turret, which is rotatably configured, and three coil needles are spaced apart around the rotation center axis of the turret.

[0027] By using the above method, the turret rotates three winding needles to achieve alternating loading and unloading operations, which can reduce the movement path of the drive device, reduce the operating power consumption of the winding device, and improve the practicality of the winding device.

[0028] In one embodiment, the winding needle is provided with a limiting step on its periphery, the limiting step being configured to abut against a sleeve that limits the battery cell.

[0029] Using the above method is beneficial to use the limiting step to limit the engagement of the sleeve and the winding needle, avoid sleeve deviation, so that the roll material can be stably wound around the outer circumference of the sleeve, and ensure the production qualification rate of the battery device.

[0030] In one embodiment, the winding apparatus further includes a cutting mechanism configured to cut the roll of the battery cell.

[0031] By using the above method, the cutting mechanism can automatically cut the roll material after the battery cell winding production is completed, thereby achieving better automation of the winding device and further improving the production efficiency of the winding device.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0036] Figure 3 This is a schematic diagram illustrating the production of a single battery cell according to some embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the sleeve in a battery cell according to some embodiments of this application;

[0038] Figure 5This is a schematic diagram of the sleeve structure in a battery cell according to other embodiments of this application;

[0039] Figure 6 This is a schematic diagram of the structure of a winding device according to some embodiments of this application;

[0040] Figure 7 This is a schematic diagram of the structure of the turret of the winding device according to some embodiments of this application.

[0041] Explanation of icon numbers:

[0042] 1000. Vehicle; 100. Battery assembly; 10. Battery cell; 11. Sleeve; 11a. Clearance gap; 111. Cylinder; 1111. Through hole; 1113. Angled structure; 1115. Clearance groove; 1117. First groove wall; 1119. Second groove wall; 113. Sealing block; 13. Roll material; 131. Positive electrode sheet; 133. Separator; 135. Negative electrode sheet; 600. Winding device; 61. Support frame; 611. First upright; 613. Second upright; 6131. ​​Insertion hole; 615. Turret; 63. Winding needle; 631. Limiting step; 65. Drive device; 67. Cutting mechanism; 200. Controller; 300. Motor. Detailed Implementation

[0043] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0045] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0049] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0051] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in rail transportation, military equipment, and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0052] Battery devices typically include battery modules composed of multiple battery cells, which can be connected in series, parallel, or series-parallel in a battery box. In related technologies, battery cells are manufactured by winding separators, positive electrode sheets, and negative electrode sheets to form cylindrical, prismatic, or other shapes. However, during the production of battery cells, slippage during winding can cause wrinkles in the winding material, such as on the separator, positive electrode sheet, and negative electrode sheet. Furthermore, directly winding the material with a needle can cause the separator attached to the outer periphery of the needle to shift and detach when the needle is withdrawn. Since the central support of the battery cell is weak, the material is prone to collapse towards the center under external forces, resulting in poor production quality, increased risk of deformation, and reduced lifespan and safety of the battery cells, ultimately lowering the structural stability and reliability of the battery device.

[0053] Based on the above considerations, in order to solve the problem of poor structural stability of battery cells, the battery cell proposed in this application includes a sleeve and a roll. The sleeve has a through hole, and the periphery of the sleeve has a clearance gap that connects to the through hole. The inner wall of the through hole has at least one bend structure, which is configured as a positioning and snap-fit ​​structure. The roll is wound around the periphery of the sleeve and includes a positive electrode sheet, a separator, and a negative electrode sheet stacked together. A separator is disposed between the positive electrode sheet and the negative electrode sheet, and one end of the separator passes through the clearance gap.

[0054] In this embodiment, by winding the roll material around the outer periphery of the sleeve and providing a clearance gap at one end of the diaphragm for clamping by the winding needle, the sleeve can form an integral support structure for the battery cell. This effectively prevents the roll material from collapsing into the through-hole under stress, thus avoiding deformation of the battery cell. Simultaneously, at least one bend structure is formed on the inner wall of the through-hole. During the battery cell winding process, the winding needle engages with the bend structure, allowing the needle to stably drive the sleeve to rotate and wind the roll material. This effectively prevents slippage during winding, ensuring the roll material is stably and securely wound around the outer periphery of the sleeve and preventing wrinkling. This results in better structural stability and reliability for the battery cell, optimizes the battery cell manufacturing process, and improves the battery cell yield.

[0055] The battery device in this application can serve as a power source or power system for an electrical device. The battery device refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. This is beneficial for improving the overall performance of the battery device and facilitating its promotion.

[0056] The aforementioned electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, spacecraft, etc. Among them, electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0057] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0058] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is internally provided in the vehicle 1000, and the battery device 100 can be located at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0059] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0060] In the battery device 100, there can be multiple battery cells 10, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 10 are connected in both series and parallel configurations. Multiple battery cells 10 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 10 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 10 first connected in series, parallel, or in a mixed manner to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 10.

[0061] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0062] Please see Figure 2 and Figure 5 The battery cell 10 proposed in this application includes a sleeve 11 and a roll 13. The sleeve 11 is provided with a through hole 1111 and a clearance gap 11a communicating with the through hole 1111 on the periphery of the sleeve 11. The inner wall of the through hole 1111 is provided with at least one bend structure 1113, which is configured as a positioning and snap-fit ​​structure. The roll 13 is wound around the periphery of the sleeve 11. The roll 13 includes a positive electrode 131, a separator 133 and a negative electrode 135 stacked together. The separator 133 is disposed between the positive electrode 131 and the negative electrode 135. One end of the separator 133 passes through the clearance gap 11a.

[0063] In this application, the sleeve 11 can be, but is not limited to, a cylindrical or square tube structure, with a through hole 1111 formed in its middle. By providing a clearance gap 11a communicating with the through hole 1111 on the periphery of the sleeve 11, the clearance gap 11a can extend along the extension direction of the sleeve 11 and can penetrate both ends of the sleeve 11. This allows the winding needle 63 of the winding device 600 to be stably inserted into the through hole 1111, and the roll material 13 held by the winding needle 63 can be sleeved and passed through the clearance gap 11a as the winding needle 63 and the sleeve 11 cooperate, so that the roll material 13 can be stably wound around the outer periphery of the sleeve 11. The clearance gap 11a can also improve the heat dissipation and venting effect of the battery cell 10, allowing the heat and gas in the battery cell 10 to flow to the through hole 1111 for better release, ensuring the stable charging and discharging of the battery cell 10. At the same time, during the production process of the battery cell 10, the clearance gap 11a also facilitates the flow and wetting of the electrolyte on the roll 13, enhancing the wetting performance of the battery cell 10.

[0064] The angled structure 1113 can be, but is not limited to, a groove or protrusion on the inner wall of the through hole 1111. The angled structure 1113 can form a positioning and locking structure for the sleeve 11 during winding. In this case, the winding needle 63 of the winding device 600 can have protrusions or grooves corresponding to the angled structure 1113 on its periphery. At least one angled structure 1113 on the inner wall of the through hole 1111 can form a stable locking relationship with the winding needle 63, allowing the winding needle 63 and the sleeve 11 to rotate stably and synchronously. This effectively prevents the sleeve 11 and the winding needle 63 from sliding against each other, ensuring stable winding of the coil 13. It also prevents wrinkles from forming when the coil 13 is wound around the outer periphery of the sleeve 11, improving the production qualification rate of the battery cell 10. By providing at least one angled structure 1113 on the inner wall of the through hole 1111, the through hole 1111 can be arranged in a regular shape such as a polygonal hole or an elliptical hole. Of course, the through hole 1111 can also be arranged in an irregular shape such as a horseshoe shape.

[0065] The roll 13 can be formed by interleaving and winding the positive electrode 131, the separator 133 and the negative electrode 135. The separator 133 can be used to separate the positive electrode 131 and the negative electrode 135 to ensure the stable charging and discharging of the battery cell 10. In the winding production process of the battery cell 10, the winding needle 63 can clamp two layers of separator 133 and insert them into the through hole 1111 of the sleeve 11, so that one end of the separator 133 passes through the clearance gap 11a for winding. After the separator 133 is wound around the sleeve 11 once, the positive electrode 131 and the negative electrode 135 are inserted into the separator 133, so that the separator 133 separates the positive electrode 131 and the negative electrode 135, and the positive electrode 131, separator 133 and negative electrode 135 are wound together. Of course, the positive electrode 131, separator 133 and negative electrode 135 can also be stacked in sequence, and then the winding needle 63 clamps one end of the separator 133 and engages with the sleeve 11 for winding. This application does not limit the winding process steps.

[0066] The technical solution of this application, by winding the roll material 13 around the outer periphery of the sleeve 11, and having one end of the separator 133 pass through an avoidance gap 11a for clamping by the winding needle, allows the sleeve 11 to form an overall support structure for the battery cell 10, effectively preventing the roll material 13 from collapsing into the through hole 1111 under stress and avoiding deformation of the battery cell 10. Simultaneously, during the winding process of the battery cell 10, the winding needle 63, in cooperation with the angled structure 1113, can stably drive the sleeve 11 to rotate and wind the roll material 13, effectively preventing slippage during winding and ensuring that the roll material 13 is stably and securely wound around the outer periphery of the sleeve 11, preventing wrinkling. This results in better structural stability and reliability for the battery cell 10, optimizes the manufacturing process of the battery cell 10, and improves the production qualification rate of the battery cell 10.

[0067] See Figures 2 to 4 In one embodiment of this application, the sleeve 11 includes a cylindrical body 111 and a sealing block 113. The cylindrical body 111 is provided with a through hole 1111, and the periphery of the cylindrical body 111 is provided with a relief groove 1115 communicating with the through hole 1111. The relief groove 1115 has a first groove wall 1117 and a second groove wall 1119 spaced apart and side by side. The sealing block 113 is disposed in the relief groove 1115. One side of the sealing block 113 abuts against or connects with the first groove wall 1117, and the other side of the sealing block 113 is spaced apart from the second groove wall 1119, forming a relief gap 11a.

[0068] In this embodiment, the sleeve 11 can be composed of a separate cylindrical body 111 and a sealing block 113. The cross-sectional shape of the cylindrical body 111 can be similar to a "C" shape, so that an opening of a certain size can be provided on the periphery of the cylindrical body 111 to form a relief groove 1115. By placing the sealing block 113 in the relief groove 1115 and combining it with the cylindrical body 111, a sleeve 11 with a certain structural strength is formed, so that the sleeve 11 can be conveniently sleeved with the coiling needle 63 for winding processing, and at the same time, it can have good overall structural strength. The sealing block 113 can adopt a block structure with a cross-sectional area slightly smaller than that of the relief groove 1115. One side of the sealing block 113 can abut or connect with the first groove wall 1117, while the other side of the sealing block 113 can be set at a certain distance from the second groove wall 1119, so that a relief gap 11a is formed between the sealing block 113 and the second groove wall 1119. The sealing block 113 can be bonded to the first groove wall 1117 by adhesive bonding; or the sealing block 113 and the first groove wall 1117 can be interlocked and fixed by the matching protrusion and groove structure; or the sealing block 113 can be directly placed in the relief groove 1115 so that the sealing block 113 abuts against the first groove wall 1117, and the sealing block 113 and the cylinder 111 can be wrapped and fixed by the roll material 13.

[0069] Specifically, by adopting the above method, during the production and processing of the battery cell 10, the sealing block 113 can be removed from the cylinder 111 to open the clearance groove 1115. The larger clearance groove 1115 can better avoid the winding material 13 held by the winding needle 63, making it easier for the sleeve 11 to engage the winding needle 63 for winding. After the sleeve 11 engages the winding needle 63, the sealing block 113 can be used to close the clearance groove 1115, ensuring the overall structural integrity of the sleeve 11. This allows the sleeve 11 to have a certain structural strength to support the winding material 13, better preventing deformation of the sleeve 11 that could cause the winding material 13 to collapse. Furthermore, one side of the sealing block 113 and the second groove wall 1119 can be used to clamp the winding material 13, preventing the winding material 13 from detaching from the sleeve 11 and ensuring the stable winding of the winding material 13 on the sleeve 11. Furthermore, the separate sleeve 11 structure can better improve the production convenience of the battery cell 10 and ensure the overall structural strength of the sleeve 11, so that the sleeve 11 can stably support the roll 13 and improve the overall structural stability and reliability of the battery cell 10.

[0070] See Figure 3 and Figure 4 In one embodiment of this application, the sleeve 11 further includes a hinge structure that connects the sealing block 113 and the cylinder 111, and the sealing block 113 is rotatably disposed relative to the cylinder 111.

[0071] In this embodiment, the hinge structure can be a hinge connecting the side of the sealing block 113 and the first groove wall 1117, or a flexible tape connecting the sealing block 113 and the cylinder 111. By using the hinge structure to achieve a rotatable connection between the sealing block 113 and the cylinder 111, the clearance groove 1115 can be opened by rotating the sealing block 113 during the production of the battery cell 10, and the clearance groove 1115 can be closed by rotating the sealing block 113 in the opposite direction after the sleeve 11 is fitted with the winding needle 63. This facilitates the use of a convenient overall structure for the sleeve 11, improving the operational convenience of the battery cell 10 processing and production.

[0072] Furthermore, the use of a hinged structure to rotatably connect the sealing block 113 to the cylinder 111 to form an integral structure is also beneficial during the winding process. By using the winding of the roll 13 to drive the sealing block 113 to rotate into the clearance groove 1115 and close the clearance groove 1115, the sealing block 113 can be automatically operated to close the clearance groove 1115 by driving the winding needle 63 of the roll sleeve through the drive device 65 and driving the sleeve 11 and the winding needle 63 to rotate synchronously. This eliminates the need for manual operation to close the clearance groove 1115, achieving better automated production and further improving the production efficiency of the battery cell 10.

[0073] See Figure 3 and Figure 4In one embodiment of this application, the roll 13 is wound from the first groove wall 1117 toward the second groove wall 1119.

[0074] In this embodiment, by winding the roll 13 from the first groove wall 1117 to the second groove wall 1119, the roll 13 can abut against the second groove wall 1119 when it is unwound, and the cylinder 111 can better support the roll 13, ensuring that the roll 13 can be unwound stably. At the same time, it can avoid the roll 13 abutting against the sealing block 113 when it is unwound, which could potentially push the sealing block 113 out of the clearance groove 1115, thereby allowing the roll 13 to be stably wrapped around the outer periphery of the sleeve 11, improving the processing and production reliability of the battery cell 10.

[0075] Furthermore, by rotatably connecting the sealing block 113 to the second groove wall 1119 to open or close the clearance groove 1115, the roll material 13 can be wound from the first groove wall 1117 to the second groove wall 1119. During the winding process, the roll material 13 can abut against the outer periphery of the sealing block 113 to drive the sealing block 113 to close the clearance groove 1115. This helps to reduce the production operation steps of the battery cell 10, achieve better automated production of the battery cell 10, and further improve the processing and production efficiency of the battery cell 10.

[0076] See Figure 3 and Figure 4 In one embodiment of this application, the distance between the first groove wall 1117 and the second groove wall 1119 gradually increases along the direction from the central axis of the through hole 1111 to the outer periphery of the cylinder 111, and the cross-sectional shape of the sealing block 113 matches the cross-sectional shape of the clearance groove 1115.

[0077] In this embodiment, the distance between the first groove wall 1117 and the second groove wall 1119 gradually increases from the outward direction, which makes the clearance groove 1115 have an outwardly expanding trumpet-shaped groove shape. At this time, by matching the cross-sectional shape of the sealing block 113 with the cross-sectional shape of the clearance groove 1115, the cross-sectional shape of the sealing block 113 can be designed to be similar to a trapezoidal structure. This is beneficial because when the sealing block 113 enters the clearance groove 1115 and closes the clearance groove 1115, the sealing block 113 and the groove wall of the clearance groove 1115 can cooperate and limit each other, so that the sealing block 113 is embedded in the clearance groove 1115, effectively restricting the movement of the sealing block 113 toward the through hole 1111, avoiding deformation of the sleeve 11, ensuring the integrity of the overall structure, and enabling the sleeve 11 to stably support the roll material 13, further improving the overall structural stability and reliability of the battery cell 10.

[0078] See Figure 5 In some embodiments, the width of the clearance gap 11a is W, where 0.5mm ≤ W ≤ 2mm.

[0079] In this embodiment, by making the width W of the clearance gap 11a greater than or equal to 0.5 mm, the roll material 13 can stably pass through the clearance gap 11a within this range, and the electrolyte and heat generated in the battery cell 10 can be better exchanged through the clearance gap 11a, thereby improving the heat dissipation and wetting effect of the battery cell 10. At the same time, by making the width W of the clearance gap 11a less than or equal to 2 mm, the clearance gap 11a can be set at a more suitable width size, preventing the clearance gap 11a from being too wide, which may reduce the structural strength of the sleeve 11, ensuring the stable support of the sleeve 11 for the roll material 13, and further improving the overall structural stability and reliability of the battery cell 10.

[0080] See Figure 5 In some embodiments, the diameter of the through hole 1111 is R1, where 3mm≤R1≤10mm.

[0081] In this embodiment, by making the aperture R1 of the through hole 1111 greater than or equal to 3mm, within this range, the through hole 1111 can have a certain ventilation area, which is beneficial to better improve the heat dissipation and exhaust effect of the battery cell 10 and ensure the stable operation of the battery cell 10. At the same time, by making the aperture R1 of the through hole 1111 less than or equal to 10mm, the aperture of the through hole 1111 can be set within a more suitable size range, avoiding the possibility that the aperture of the through hole 1111 is too large and may reduce the structural strength of the sleeve 11, reducing the risk of collapse and deformation of the lateral through hole 1111 of the sleeve 11, so that the sleeve 11 can better withstand the external force, ensure the stable support of the sleeve 11 for the coil 13, and further improve the overall structural stability and reliability of the battery cell 10.

[0082] See Figure 5 In some embodiments, the outer diameter of the sleeve 11 is R2, where 4mm ≤ R2 ≤ 11mm.

[0083] In this embodiment, by making the outer diameter R2 of the sleeve 11 greater than or equal to 4mm, the sleeve 11 can have a certain structural strength within this range, ensuring the stable support of the sleeve 11 for the roll material 13. At the same time, by making the outer diameter R2 of the sleeve 11 less than or equal to 11mm, the outer diameter of the sleeve 11 can be set within a more suitable size range, avoiding the possibility that an excessively large outer diameter of the sleeve 11 might affect the number of turns of the roll material 13. This allows the sleeve 11 to better adapt to the size manufacturing requirements of the battery cell 10 while ensuring the support of the roll material 13, further improving the practicality and structural reliability of the battery cell 10.

[0084] By adopting the above-mentioned sleeve 11 structural design, the heat dissipation and wetting effect of the battery cell 10 can be better improved by avoiding the gap 11a; and the overall structure of the sleeve 11 can be made more stable, ensuring the support of the sleeve 11 for the coil 13.

[0085] See Figure 2 and Figure 5 This application also proposes a battery cell 10, including a sleeve 11 and a roll 13. The sleeve 11 is provided with a through hole 1111 and the roll 13. The sleeve 11 is provided with a clearance gap 11a communicating with the through hole 1111 on its periphery. The inner wall of the through hole 1111 is provided with at least one bend structure 1113. The bend structure 1113 is configured to engage with the winding needle 63 of the winding device 600. The roll 13 passes through the clearance gap 11a and is wound around the periphery of the sleeve 11. The roll 13 includes a separator 133 and an electrode sheet stacked in sequence.

[0086] The specific structure of the battery cell 10 is as described in the above embodiments. Since the battery cell 10 proposed in this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0087] This application also proposes a battery device 100, including a battery cell 10 as described in any of the foregoing embodiments, the specific structure of which refers to the above embodiments.

[0088] This application also proposes an electrical device including a battery device 100 as described in any of the foregoing embodiments, the specific structure of which refers to the above embodiments. By employing the battery device 100 from the foregoing embodiments of this application in the electrical device, the battery capacity of the electrical device can be increased, which is beneficial for improving battery life and voltage.

[0089] Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0090] Since the electrical device proposed in this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0091] See Figure 6This application also proposes a winding device 600, which is configured to manufacture the battery cell 10 in any of the foregoing embodiments. The specific structure of the battery cell 10 refers to the above embodiments. The winding device 600 includes a support frame 61, a winding needle 63, and a driving device 65. The winding needle 63 is rotatably connected to the support frame 61 and can clamp the roll 13 of the battery cell 10. The driving device 65 is movably disposed and configured to drive the sleeve 11 of the battery cell 10 to move and engage the winding needle 63, and can drive the sleeve 11 and the winding needle 63 to rotate synchronously.

[0092] In this embodiment, the winding device 600 can be a processing device for winding the battery cell 10 into a roll 13 during the production of the battery device 100. The winding device 600 can be used to ensure that the roll 13 is accurately and neatly wound on the outer periphery of the sleeve 11, so as to realize the reliable processing and production of the battery cell 10.

[0093] The winding needle 63 can be configured with two openable and closable mating rods. This allows the winding needle 63 to stably clamp the coil material 13 using the two rods, and to separate and open a certain gap when winding is complete, reducing the likelihood of the winding needle 63 pulling away from the coil material 13 and ensuring reliable production of the battery device 100. The cross-sectional shape of the winding needle 63 can match the cross-sectional shape of the through hole 1111 of the sleeve 11. For example, if the through hole 1111 of the sleeve 11 is a square or hexagonal hole, and the corners of the square or hexagonal hole form a bend structure 1113, the winding needle 63 can be configured with corresponding square or hexagonal rods. As another example, if the through hole 1111 of the sleeve 11 has a horseshoe-shaped cross-section, and the inner wall of the through hole 1111 has protrusions forming a bend structure 1113, the winding needle 63 can be configured with rods of corresponding cross-sectional shapes, and the outer periphery of the winding needle 63 can have grooves corresponding to the protrusions on the inner wall of the through hole 1111. Furthermore, the winding needle 63 can be inserted into the through hole 1111 of the sleeve 11, and the winding needle 63 can engage with the sleeve 11 to ensure that the winding needle 63 and the sleeve 11 can rotate stably and synchronously, thus ensuring the stable winding of the roll material 13 on the sleeve 11 and preventing the sleeve 11 and the winding needle 63 from moving relative to each other, which may cause the roll material 13 to wrinkle.

[0094] The support frame 61 can be a stand, tripod, or other frame structure that provides support for the winding needle 63. The support frame 61 can also serve as the operating table for the winding device 600, facilitating the positioning and control of the winding of the roll material 13 and the unloading of the wound material. Simultaneously, it allows for direct monitoring of the winding process, ensuring the stable operation of the winding device 600. Specifically, a rotating shaft can be installed on the support frame 61 and connected to the winding needle 63, allowing the winding needle 63 to rotate on the support frame 61 under the action of the rotating shaft; alternatively, a bearing can be installed on the support frame 61, allowing the winding needle 63 to be inserted into the inner ring of the bearing to achieve rotation on the support frame 61.

[0095] The drive unit 65 can be located next to the support frame 61 to transfer the sleeve 11 and provide winding driving force. The drive unit 65 can be equipped with components such as a motor and a cylinder. During the processing of the winding device 600, the sleeve 11 can be connected to the drive shaft of the drive unit 65. The drive unit 65 drives the sleeve 11 to move in alignment with the winding needle 63, so that the sleeve 11 engages with the winding needle 63. At this time, the sleeve 11 and the drive shaft can be positioned and installed. Alternatively, the drive unit 65 can be equipped with an identification module to accurately identify the winding needle 63 and adjust the position of the sleeve 11 accordingly so that the winding needle 63 can be stably inserted into the through hole 1111 of the sleeve 11. At the same time, the roll material 13 held by the winding needle 63 can be stably passed through the clearance gap 11a of the sleeve 11, thereby achieving precise processing of the winding device 600.

[0096] By adopting the above solution, precise docking and synchronous rotation and winding of the sleeve 11 and the winding needle 63 can be achieved, reducing the difficulty of winding the roll 13 and the risks of slippage and wrinkling. At the same time, the separation of the sleeve 11 and the winding needle 63 can better prevent the roll 13 from being pulled away and deviated, ensuring the production and processing quality of the battery device 100. Meanwhile, the winding device 600 can be used to better realize the automated production of the battery device 100, improve the production efficiency of the battery device 100, and effectively improve the practicality and reliability of the winding device 600.

[0097] See Figure 6 In one embodiment of this application, the support frame 61 includes a first upright 611 and a second upright 613, the first upright 611 and the second upright 613 are spaced apart, the coil needle 63 is rotatably connected to the first upright 611, the second upright 613 is provided with an insertion hole 6131, the insertion hole 6131 is opposite to the coil needle 63, and the insertion hole 6131 is configured to allow the sleeve 11 of the battery cell 10 to pass through.

[0098] In this embodiment, the first support frame 611 and the second support frame 613 can be two parallel frame structures, or they can be set up as two independent frame structures to facilitate the maintenance and upgrading of the support frame 61, and at the same time enable the support frame 61 to better adapt to various lengths of the winding needles 63; of course, the first support frame 611 and the second support frame 613 can also be set up as an integral structure to better improve the structural integrity of the winding device 600 and facilitate transportation and use.

[0099] The winding needle 63 can be rotatably connected at one end to the first support 611, and extend along the direction from the first support 611 to the second support 613, so that the winding needle 63 is placed horizontally between the first support 611 and the second support 613. An insertion hole 6131 is provided on the second support 613, opposite to the other end of the winding needle 63. The insertion hole 6131 penetrates the second support 613, and the diameter of the insertion hole 6131 can be slightly larger than the outer diameter of the sleeve 11 of the battery cell 10. This allows the drive device 65 to drive the sleeve 11 to stably pass through the insertion hole 6131 and be fitted onto the winding needle 63. The insertion hole 6131 enables precise docking between the sleeve 11 and the winding needle 63, reducing offset when the drive device 65 moves the sleeve 11, and further improving the practicality and structural reliability of the winding device 600.

[0100] See Figure 7 In one embodiment of this application, the winding device 600 includes three winding needles 63, which are connected to the support frame 61 at intervals and are rotatably disposed.

[0101] In this embodiment, the drive device 65 can sequentially attach the sleeve 11 to three winding needles 63 to perform winding processing of the roll material 13, and sequentially cut and process the roll material 13 wound on the three winding needles 63 to unload the material, so that the winding device 600 can use the three winding needles 63 to work alternately and continuously, thereby improving the production efficiency of the winding device 600.

[0102] Specifically, the three sequentially arranged winding needles 63 can be designated as the first winding needle 63, the second winding needle 63, and the third winding needle 63. During the operation of the winding device 600, the drive device 65 can be controlled to attach the sleeve 11 to the first winding needle 63, and drive the sleeve 11 and the first winding needle 63 to rotate synchronously to wind the roll material 13. After the winding operation on the first winding needle 63 is completed, the drive device 65 is then controlled to attach another sleeve 11 to the second winding needle 63 to perform the winding operation of the roll material 13. The first winding needle 63 can perform the cutting operation of the roll material 13. After the winding operation is completed on the second winding needle 63, the drive device 65 can be controlled to attach another sleeve 11 to the third winding needle 63 and perform a reverse winding operation of the roll material 13. At this time, the material processed on the first winding needle 63 can be unloaded, and the roll material 13 cutting operation can be performed on the second winding needle 63. After the winding operation is completed on the third winding needle 63, the drive device 65 can be controlled to attach the sleeve 11 to the first winding needle 63. Thus, the winding, cutting, and unloading operations of the roll material 13 and the processed material can be alternately and repeatedly performed on the three winding needles 63, so that the winding device 600 can continuously produce the battery device 100 and improve the production efficiency of the winding device 600.

[0103] See Figure 7 In one embodiment of this application, the support frame 61 includes a turret 615, which is rotatably disposed, and three coil needles 63 are spaced apart around the rotation center axis of the turret 615.

[0104] In this embodiment, the turret 615 can be, but is not limited to, a disc, a triangular disc, or other structural configurations. A motor connected to the support frame 61 can be installed to drive the turret 615 to rotate. Three winding needles 63 can be arranged sequentially at intervals along the rotation direction of the turret 615, and can be symmetrically arranged with the rotation axis of the turret 615 as the center of symmetry. Under the action of the turret 615 driving the three winding needles 63 to rotate, the drive device 65 can be positioned on one side of the support frame 61. The turret 615 drives the three winding needles 63 to rotate sequentially to the corresponding positions of the drive device 65. After the drive device 65 attaches the sleeve 11 to the winding needle 63 for winding the material 13, the turret 615 can rotate to move the wound material to another position for cutting the material 13, and move the next winding needle 63 to the position of the drive device 65 for winding, thereby ensuring continuous production of the winding device 600 and improving its production efficiency.

[0105] By using the turret 615 to evenly arrange three winding needles 63 for alternating rotation, the driving device 65 can be positioned on one side of the support frame 61. This allows the driving device 65 to perform the forward and backward operation of the sleeve 11 and the rotation operation of the sleeve 11 to complete the winding operation. This helps to reduce the movement path of the driving device 65, reduce the operating power consumption of the winding device 600, and better improve the practicality of the winding device 600.

[0106] See Figure 6 In one embodiment of this application, a limiting step 631 is provided on the periphery of the winding needle 63, and the limiting step 631 is configured to abut against the sleeve 11 of the limiting battery cell 10.

[0107] In this embodiment, the limiting step 631 can be a protrusion or bump on the periphery of the coiling needle 63, or the coiling needle 63 can be made of two sections of rods with different outer diameters, so that the limiting step 631 is formed at the transition between the two sections of rods with different outer diameters. Furthermore, when the sleeve 11 is fitted onto the coiling needle 63, the limiting step 631 can abut against the end of the sleeve 11 facing away from the driving device 65, achieving a limiting fit between the sleeve 11 and the coiling needle 63. This ensures that the position of the sleeve 11 is precisely where the roll material 13 can be stably wound around the outer periphery of the sleeve 11, ensuring that each sleeve 11 is fitted onto the coiling needle 63 in the same position, guaranteeing the production consistency of each battery device 100, reducing production errors of the battery device 100, and ensuring the production qualification rate of the battery device 100.

[0108] See Figure 6 In one embodiment of this application, the winding device 600 further includes a cutting mechanism 67 configured to cut the roll 13 of the battery cell 10.

[0109] The cutting mechanism 67 can be an electrothermal knife capable of cutting the roll material 13. By controlling the power of the cutting mechanism 67, a certain amount of heat can be generated to melt and cut the roll material 13. Alternatively, the cutting mechanism 67 can be a cutter connected to a slide rail device, which can slide the cutter to cut the roll material 13. During the operation of the winding device 600, the control drive device 65 drives the sleeve 11 and the winding needle 63 to rotate synchronously a certain number of times. After the required length of roll material 13 is wound around the outer circumference of the sleeve 11, the cutting mechanism 67 can be controlled to cut the roll material 13, completing the winding process of the battery device 100. This allows the winding device 600 to achieve better fully automated operation, further reducing the number of manual operations required and improving the production efficiency of the winding device 600.

[0110] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery cell, characterized in that, include: A sleeve, the sleeve having a through hole, the sleeve having a clearance slit communicating with the through hole on its periphery, and the inner wall of the through hole having at least one bevel structure configured as a positioning snap-fit ​​structure; and A roll of material, the roll of material being wound around the periphery of the sleeve, the roll of material comprising a positive electrode sheet, a separator and a negative electrode sheet stacked together, the separator being disposed between the positive electrode sheet and the negative electrode sheet, one end of the separator being inserted through the clearance gap.

2. The battery cell as described in claim 1, characterized in that, The sleeve includes: A cylindrical body, wherein the cylindrical body is provided with the through hole, and a relief groove communicating with the through hole is provided on the periphery of the cylindrical body, the relief groove having a first groove wall and a second groove wall spaced apart and side by side; and A sealing block is disposed within the clearance groove. One side of the sealing block abuts against or connects to the first groove wall, and the other side of the sealing block is spaced apart from the second groove wall to form the clearance gap.

3. The battery cell as described in claim 2, characterized in that, The sleeve also includes a hinge structure that connects the sealing block and the cylinder, wherein the sealing block is rotatable relative to the cylinder.

4. The battery cell as described in claim 2, characterized in that, The roll material is wound from the first groove wall toward the second groove wall.

5. The battery cell as described in claim 2, characterized in that, Along the central axis of the through hole to the outer periphery of the cylinder, the distance between the first groove wall and the second groove wall gradually increases, and the cross-sectional shape of the sealing block matches the cross-sectional shape of the clearance groove.

6. The battery cell as described in claim 1, characterized in that, The width of the clearance gap is W, where 0.5mm ≤ W ≤ 2mm; And / or, the diameter of the through hole is R1, 3mm≤R1≤10mm; And / or, the outer diameter of the sleeve is R2, 4mm≤R2≤11mm.

7. A battery device, characterized in that, Includes the battery cell as described in any one of claims 1 to 6.

8. An electrical device, characterized in that, Includes the battery device as described in claim 7.

9. A winding device, characterized in that, The winding apparatus is configured to manufacture a battery cell according to any one of claims 1 to 6, the winding apparatus comprising: Support frame; A winding needle, rotatably connected to the support frame, capable of clamping a roll of battery cells; and A driving device is movably configured to drive the sleeve of the battery cell to move and engage with the winding needle, and to drive the sleeve and the winding needle to rotate synchronously.

10. The winding apparatus as claimed in claim 9, characterized in that, The support frame includes a first upright and a second upright, which are spaced apart. The winding needle is rotatably connected to the first upright. The second upright is provided with an insertion hole, which is opposite to the winding needle. The insertion hole is configured to allow the sleeve of the battery cell to pass through.

11. The winding apparatus as claimed in claim 9, characterized in that, The winding device includes three winding needles, which are connected to the support frame at intervals and are rotatably mounted.

12. The winding apparatus as claimed in claim 11, characterized in that, The support frame includes a turret, which is rotatably mounted, and three coil needles are spaced apart around the rotation center axis of the turret.

13. The winding apparatus as claimed in claim 9, characterized in that, The winding needle is provided with a limiting step on its periphery, and the limiting step is configured to abut against the sleeve that limits the battery cell.

14. The winding apparatus as claimed in claim 9, characterized in that, The winding device also includes a cutting mechanism configured to cut the roll of the battery cell.

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