A tile winding type lithium ion battery and a heat-not-burn smoking set

Abstract

The utility model provides a kind of tile winding lithium ion battery and heating not combustible smoking set, and battery includes winding core, positive electrode lug and negative electrode lug on winding core, winding core is formed by inside circular winding needle winding symmetry circular structure, winding core is after at least two shadow projection bending shaping and presents tile structure.The utility model provides a kind of tile winding lithium ion battery and heating not combustible smoking set, adopt winding longitudinal bending to solve the hidden danger that positive and negative pole cannot be covered by pole piece displacement in laminated piece, can also solve the damage of transverse bending to winding core, the range of R angle of bending is very big;The scheme adopts inside circular winding needle winding, adopts shadow projection bending to ensure the R angle of longitudinal bending and the bending degree of finished battery, little influence to original winding structure in the whole bending shaping process, to guarantee the characteristics of battery's plasticity and performance.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, specifically to a tile-wound lithium-ion battery and a heated non-combustible smoke device, which is suitable for scenarios such as heated non-combustible smoke devices that require tile batteries. Background Technology

[0002] Currently, there are two main processes for manufacturing bent lithium-ion batteries: 1) Lithium-ion batteries using the stacking process can be bent into tiles both longitudinally and laterally. However, during the bending process, the electrode layers in the stacking core will shift, which will lead to poor coverage in both the lateral and longitudinal directions. On the other hand, the low stacking efficiency seriously affects the mass production process. 2) Wound lithium-ion batteries: The conventional process is to bend laterally, which is simple. However, the bending process damages the core. Also, the bending angle cannot be too large, the battery thickness cannot be too thick, and it is not possible to mass-produce them.

[0003] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a tile-wound lithium-ion battery and a heated non-combustible smoke device to solve the above problems. Utility Model Content

[0004] To address the problems of electrode displacement, limited bending degree, and low production efficiency in existing bent batteries, a tile-wound lithium-ion battery with high reliability is provided, which achieves small-arc bending through inner circular winding needles and projection bending shaping.

[0005] To achieve the above and other related objectives, the technical solution provided by this utility model is: a tile-shaped wound lithium-ion battery, including a wound core, a positive electrode tab and a negative electrode tab disposed on the wound core, wherein the wound core is formed into a symmetrical circular structure by being wound by an inner circular winding needle, and the wound core is formed into a tile-shaped structure after being shaped by at least two projection bending processes.

[0006] The preferred technical solution is that the minimum bending radius R1 of the inner ring after the winding core is bent is ≥3mm.

[0007] The preferred technical solution is as follows: the wound core includes a positive electrode sheet, a separator and a negative electrode sheet stacked in sequence, the positive electrode sheet and the negative electrode sheet are separated by the separator, the positive electrode tab is connected to the positive electrode sheet, and the negative electrode tab is connected to the negative electrode sheet.

[0008] The preferred technical solution is that the edge alignment error of the positive electrode and the negative electrode is ≤0.1mm, and the edge of the separator extends beyond the edges of the positive electrode and the negative electrode by 0.5-2mm to ensure interlayer insulation.

[0009] The preferred technical solution is as follows: the cross-section of the inner circular winding needle is circular. During the winding process, the inner circular winding needle drives the positive electrode sheet, the separator and the negative electrode sheet to spirally wind around its axis to form a centrally symmetrical cylindrical core blank.

[0010] A preferred technical solution is as follows: it further includes a packaging shell, the wound core is packaged inside the packaging shell, the packaging shell is an arc-shaped shell made of flexible polymer material, and both the positive electrode tab and the negative electrode tab are led out to the outside of the packaging shell.

[0011] A heated non-combustible smoke appliance, comprising the aforementioned tile-wound lithium-ion battery.

[0012] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows: This utility model provides a tile-wound lithium-ion battery and a heated non-combustible smoke device. It uses a winding longitudinal bending method to solve the hidden danger of incomplete coverage of positive and negative electrodes caused by electrode displacement in the stacking process. At the same time, it can solve the damage to the core caused by lateral bending. The range of the bending radius (R-angle) is very large. This solution uses an inner circular winding needle and a projection bending method to ensure the radius of the longitudinal bending and the curvature of the finished battery. The original winding structure is minimally affected during the entire bending and shaping process, thus ensuring that the battery has both good shape and performance characteristics. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the one-time shaping mechanism for the winding core involved in this utility model.

[0014] Figure 2 This is a schematic diagram of the secondary shaping mechanism for the winding core involved in this utility model.

[0015] Figure 3 This is a schematic cross-sectional view of the smoking device involved in this utility model. Detailed Implementation

[0016] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0017] Please see Figures 1-3It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. 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 component 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. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Example: According to an overall technical concept of this utility model, a tile-wound lithium-ion battery (high energy density, high power, and high safety polymer lithium battery) is provided, including a wound core, a positive electrode tab and a negative electrode tab disposed on the wound core. The wound core is formed by winding an inner circular needle to form a symmetrical circular structure. After being shaped by at least two projection bending processes, the wound core has a tile-shaped structure.

[0020] In one exemplary embodiment of this utility model, the minimum bending radius R1 of the inner ring after the wound core is bent is ≥3mm.

[0021] In one exemplary embodiment of this utility model, the wound core includes a positive electrode sheet, a separator, and a negative electrode sheet stacked sequentially. The positive electrode sheet and the negative electrode sheet are separated by the separator. The positive electrode tab is connected to the positive electrode sheet, and the negative electrode tab is connected to the negative electrode sheet.

[0022] In one exemplary embodiment of this utility model, the edge alignment error of the positive electrode and the negative electrode is ≤0.1mm, and the edge of the separator extends beyond the edges of the positive electrode and the negative electrode by 0.5-2mm to ensure interlayer insulation.

[0023] In one exemplary embodiment of this utility model, the cross-section of the inner circular winding needle is circular. During the winding process, the inner circular winding needle drives the positive electrode sheet, the separator and the negative electrode sheet to spirally wind around its axis to form a centrally symmetrical cylindrical core blank.

[0024] In one exemplary embodiment of this utility model, it further includes a packaging shell, a wound core is packaged inside the packaging shell, the packaging shell is an arc-shaped shell made of flexible polymer material, and both the positive electrode tab and the negative electrode tab are led out to the outside of the packaging shell.

[0025] It should be noted that: First, the winding core is symmetrically fixed at its center using positioning shaft 1 (with a crescent-shaped cross-section). Then, the upper grooved shaping fixture 3 and the lower convex shaping fixture 2 are used for distributed projection shaping, with the lower part of the core approximately projecting onto the upper part, resulting in a curved shape before and after shaping. Using positioning shaft 1 ensures symmetry and core regularity during the shaping process, minimizing changes to the core and having no impact on product performance. This shaping method also allows for control of the internal radius R1 to be ≥3mm, thus expanding the curvature range of the arc-shaped battery. Combined with the high efficiency and reliability of the winding core, arc-shaped batteries produced using this core mechanism exhibit excellent characteristics such as small curvature, unlimited battery thickness, high production efficiency, and high reliability.

[0026] In addition, mapped bending shaping includes at least two step-by-step shaping processes: During the first shaping, the central axis of symmetry of the wound core is fixed by the positioning shaft 1, and the downward convex shaping jig 2 is used to apply an upward arc-shaped pressure to the bottom of the core, so that the bottom of the core is initially bent to form a concave arc. During the second shaping process, the top of the core is subjected to downward arc-shaped pressure by the upper groove shaping clamps, causing the top of the core to bend further to form an upward convex arc, ultimately forming a tile-like structure.

[0027] like Figure 2 As shown, this utility model also relates to a heated non-combustible smoking device, including a housing 4, a heating tube 5, and the aforementioned tile-wound lithium-ion battery 6. The housing 4 is configured as a tubular structure with an annular cavity. The heating tube 5 is fixed on the inner wall of the cigarette insertion end of the housing 4, and the tile-wound lithium-ion battery 6 is fixed in the annular cavity of the cigarette extraction end of the housing 4. The tile-wound lithium-ion battery 6 is used to supply power to the heating tube 4.

[0028] Therefore, this utility model has the following advantages: This utility model provides a tile-wound lithium-ion battery and a heated non-combustible smoke device. It solves the problem of incomplete coverage of positive and negative electrodes caused by electrode displacement in the stacking by using longitudinal bending of the winding. At the same time, it can solve the damage to the core caused by lateral bending. The range of the bending radius (R-angle) is very large. This solution uses an inner circular winding needle and a projection bending method to ensure the radius of the longitudinal bending and the curvature of the finished battery. The original winding structure is minimally affected during the entire bending and shaping process, thus ensuring that the battery has both good shape and performance.

[0029] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tile-wound lithium-ion battery, characterized by: It includes a wound core, a positive electrode tab and a negative electrode tab disposed on the wound core. The wound core is formed into a symmetrical circular structure by being wound by an inner circular winding needle. The wound core is formed into a tile-like structure after being shaped by at least two projection bending processes.

2. The tile-wound lithium-ion battery according to claim 1, characterized in that: The minimum bending radius R1 of the inner ring after the wound core is bent is ≥3mm.

3. A tile-wound lithium-ion battery according to claim 1, characterized in that: The wound core includes a positive electrode sheet, a separator, and a negative electrode sheet stacked in sequence. The positive electrode sheet and the negative electrode sheet are separated by the separator. The positive electrode tab is connected to the positive electrode sheet, and the negative electrode tab is connected to the negative electrode sheet.

4. A tile-wound lithium-ion battery according to claim 3, characterized in that: The edge alignment error of the positive and negative electrode sheets is ≤0.1mm, and the edge of the separator extends 0.5-2mm beyond the edges of the positive and negative electrode sheets to ensure interlayer insulation.

5. A tile-wound lithium-ion battery according to claim 1, characterized in that: The inner circular winding needle has a circular cross-section. During the winding process, the inner circular winding needle drives the positive electrode sheet, the separator, and the negative electrode sheet to spirally wind around its axis, forming a centrally symmetrical cylindrical core blank.

6. A tile-wound lithium-ion battery according to claim 1, characterized in that: It also includes a packaging shell, in which the wound core is encapsulated. The packaging shell is an arc-shaped shell made of flexible polymer material, and both the positive electrode tab and the negative electrode tab are led out to the outside of the packaging shell.

7. A heated non-combustible smoking appliance, characterized in that: Including the tile-wound lithium-ion battery as described in any one of claims 1-6.

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