Flexible roll core of battery

Abstract

The utility model relates to a flexible roll core of a battery, which belongs to the technical field of batteries and comprises a battery body, the battery body comprises a positive plate, diaphragms and a negative plate, the diaphragms are positioned between the positive plate and the negative plate, and more than one diaphragm is arranged between the positive plate and the negative plate. And the outer surface of the positive plate and the outer surface of the negative plate are respectively provided with more than one bending seam. According to the flexible roll core of the battery, a plurality of bending seams are formed in the outer side of a positive plate and the outer side of a negative plate, the bending seams are formed before the positive plate, a diaphragm and the negative plate are wound, then the positive plate with the bending seams, the negative plate with the bending seams and the diaphragm are sequentially stacked together and wound, and a battery body with the bending seams is obtained; therefore, the deformation capability of the positive plate and the negative plate is improved based on the support of the gap of the bending seam, so that the roll core with the bending seam has a bending deformation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a flexible winding core of a battery. Background Art

[0002] Traditional batteries are composed of 1 layer of positive electrode, 1 layer of negative electrode, and 2 layers of separator. The separator separates the positive and negative electrodes. These 4 layers are stacked first and then wound to obtain a core.

[0003] Another technology is lamination, where the positive electrode sheet and the negative electrode sheet are separated by a diaphragm. Multiple layers of positive electrode sheets, multiple layers of negative electrode sheets, and multiple layers of diaphragms are stacked into a core.

[0004] For batteries used in some products such as watches, bracelets, and rings, it is necessary to use batteries that can be bent into an arc shape. The traditional winding core cannot change its shape later, and a laminated structure is required. However, the manufacturing efficiency of the laminated structure is much lower than that of the winding structure. To produce the same amount of batteries per unit time, the equipment and manpower used are several times that of the winding battery, resulting in too low production efficiency for curved batteries. Therefore, a flexible winding core of a battery is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a flexible winding core of a battery, which can solve the problems that traditional winding structure batteries cannot be bent, and laminated batteries can be bent but have low production efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: comprising a battery body, wherein the battery body comprises a positive electrode sheet, a separator, and a negative electrode sheet.

[0007] The separator is located between the positive electrode sheet and the negative electrode sheet, and more than one separator is arranged between the positive electrode sheet and the negative electrode sheet.

[0008] The outer surface of the positive electrode sheet and the outer surface of the negative electrode sheet are both provided with at least one bending seam.

[0009] Preferably, the bending seams are in the shape of strips, and the bending seams located in the same horizontal transverse direction are equidistantly distributed, and the bending seams located in the same horizontal longitudinal direction are equidistantly distributed.

[0010] Preferably, the overall length of the bending seam is defined as L1, and 0.5 mm ≤ L1 ≤ 5 mm, and the overall width of the bending seam is defined as L 2， And 0.5mm≤L2≤1mm.

[0011] Preferably, the bending seam depth is defined as L3, and 0.005 mm ≤ L3 ≤ 0.1 mm.

[0012] Preferably, the bending seams are in a herringbone shape, and the bending seams located in the same horizontal transverse direction are equidistantly distributed, and the bending seams located in the same horizontal longitudinal direction are equidistantly distributed.

[0013] Preferably, the three edges in the bending seam form three angles, which are defined as a1, a2, and a3, respectively, and 30°≤a1≤170°, 30°≤a2≤170°, and 30°≤a3≤170°.

[0014] Preferably, the lengths of the three seams in the bending seam are defined as I1, I2, and I3, respectively, and 0.2mm≤I1≤3mm, 0.2mm≤I2≤3mm, and 0.2mm≤I3≤3mm; the depth of the bending seam is defined as h, and 0.03mm≤h≤0.13mm.

[0015] Compared with the prior art, the utility model provides a flexible winding core of a battery, which has the following beneficial effects:

[0016] 1. The flexible winding core of the battery improves the deformation capacity of the positive electrode sheet and the negative electrode sheet based on the gap support of the bending seam itself, so that the winding core with the bending seam has the effect of bending and deformation.

[0017] 2. The flexible winding core of the battery can provide spatial deformation support for the horizontal or vertical folding of the positive electrode sheet and the negative electrode sheet by setting the shape of the bending seam to a strip seam shape.

[0018] 3. The flexible winding core of the battery provides deformation support space in three directions for the positive electrode sheet and the negative electrode sheet by setting the bending seam in a herringbone shape, supported by three groove spaces in the herringbone shape, so that the battery body after winding can be bent in three directions.

[0019] 4. The flexible winding core of the battery can adjust the distance between the longitudinal bending seams located at the same level, and adjust the distance between the longitudinal bending seams located at the same level, and set the bending seams in different shapes, so that the battery body can be bent to different degrees to meet the purpose of bending battery bodies of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall distribution structure of the utility model;

[0021] Figure 2 This is a schematic diagram of a bent structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the top view structure of the utility model;

[0023] Figure 4This is another schematic diagram of the bent structure of the utility model.

[0024] In the figure: 1. Battery body; 2. Positive electrode sheet; 3. Separator; 4. Negative electrode sheet; 5. Bending seam. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example: See Figure 1 - Figure 4 A flexible winding core of a battery in this embodiment includes a battery body 1, wherein the battery body 1 includes a positive electrode sheet 2, a separator 3, and a negative electrode sheet 4;

[0027] The separator 3 is located between the positive electrode sheet 2 and the negative electrode sheet 4, and more than one separator 3 is arranged between the positive electrode sheet 2 and the negative electrode sheet 4;

[0028] The outer surface of the positive electrode sheet 2 and the outer surface of the negative electrode sheet 4 are both provided with at least one bending seam 5 .

[0029] By placing more than one separator 3 between the positive electrode sheet 2 and the negative electrode sheet 4, the positive electrode sheet 2 and the negative electrode sheet 4 are isolated, so that the positive electrode sheet 2, the separator 3, and the negative electrode sheet 4 are stacked, and then the stacked positive electrode sheet 2, the separator 3, and the negative electrode sheet 4 are wound to form a battery body 1, and the battery body 1 is used in a winding core shape, so that under the isolation of the multi-layer separator 3, the positive electrode sheet 2 and the negative electrode sheet 4 can operate safely and stably, ensuring the safety and reliability of the further processing of the battery body 1, and because the specific processing and winding steps are prior art, they are not described in detail in this embodiment;

[0030] Among them, by opening a plurality of bending seams 5 on the outside of the positive electrode sheet 2 and the negative electrode sheet 4, and before winding the positive electrode sheet 2, the diaphragm 3 and the negative electrode sheet 4, the bending seams 5 are opened, and then, the positive electrode sheet 2 and the negative electrode sheet 4 with the bending seams 5 and the diaphragm 3 are stacked together in sequence and wound to obtain a battery body 1 with the bending seams 5, thereby improving the deformation ability of the positive electrode sheet 2 and the negative electrode sheet 4 based on the gap support of the bending seams 5 themselves, so that the winding core with the bending seams 5 has the effect of bending deformation.

[0031] Example 1: Please refer to Figure 1 - Figure 2In the present embodiment, a flexible winding core of a battery comprises a battery body 1, wherein the battery body 1 comprises a positive electrode sheet 2, a separator 3, and a negative electrode sheet 4, wherein the separator 3 is located between the positive electrode sheet 2 and the negative electrode sheet 4, and there is more than one separator 3 disposed between the positive electrode sheet 2 and the negative electrode sheet 4, and more than one bending seam 5 is disposed on the outer surface of the positive electrode sheet 2 and the outer surface of the negative electrode sheet 4, wherein the bending seam 5 is in the shape of a strip seam, and the bending seams 5 located in the same horizontal transverse direction are equidistantly distributed, and the bending seams 5 located in the same horizontal longitudinal direction are equidistantly distributed, and the overall length of the bending seam 5 is defined as L1, and 0.5 mm ≤ L1 ≤ 5 mm, and the overall width of the bending seam 5 is defined as L 2， And 0.5mm≤L2≤1mm, the depth of the bending seam 5 is defined as L3, and 0.005mm≤L3≤0.1mm.

[0032] By setting the shape of the bending seam 5 to be slit-like, it can provide spatial deformation support for the lateral or longitudinal folding of the positive electrode sheet 2 and the negative electrode sheet 4, and under the restrictions of the length, width and height specifications of the bending seam 5 itself, it is ensured that the slit-like bending seam 5 has the specifications of the minimum bending support space, and at the same time its maximum specifications are restricted to prevent its specifications from being too large, which may cause the bending seam 5 to deform excessively and break when the battery body 1 is bent as a whole, thereby making the bending seam 5 within the safe support range, and by adjusting the distance between the longitudinal bending seams 5 located at the same level, the distance between the longitudinal bending seams 5 located at the same level is adjusted, so that it can provide different degrees of bending support for the battery body 1, thereby meeting the purpose of bending battery bodies 1 of different specifications.

[0033] Example 2: Please refer to Figure 3 - Figure 4 In the present embodiment, a flexible winding core of a battery comprises a battery body 1, wherein the battery body 1 comprises a positive electrode sheet 2, a separator 3, and a negative electrode sheet 4, wherein the separator 3 is located between the positive electrode sheet 2 and the negative electrode sheet 4, and there is more than one separator 3 disposed between the positive electrode sheet 2 and the negative electrode sheet 4, and more than one bending seam 5 is disposed on the outer surface of the positive electrode sheet 2 and the outer surface of the negative electrode sheet 4, wherein the bending seam 5 is in a herringbone shape, and the bending seams 5 located in the same horizontal horizontal direction are equidistantly distributed, and the bending seams 5 located in the same horizontal longitudinal direction are equidistantly distributed. The three edges in the bending seam 5 form three angles, which are defined as a1, a2, and a3, and 30°≤a1≤170°, 30°≤a2≤170°, and 30°≤a3≤170°. The lengths of the three seams in the bending seam 5 are defined as I1, I2, and I3, and 0.2mm≤I1≤3mm, 0.2mm≤I2≤3mm, and 0.2mm≤I3≤3mm. The depth of the bending seam 5 is defined as h, and 0.03mm≤h≤0.13mm.

[0034] By setting the bending seam 5 in a herringbone shape, with the support of the three grooved spaces in the herringbone shape, deformation support space is provided in three directions for the positive electrode sheet 2 and the negative electrode sheet 4, so that the battery body 1 after being rolled can be bent from three directions, and with the combined support of the three grooved spaces in the herringbone shape, the battery body 1 after being rolled can be bent at irregular angles, so that it has a variety of bending states, and by limiting the angles between the three edges in the herringbone shape and the length, width and height specifications of the three seams, the minimum deformation support space is met, and the maximum deformation space is limited, so as to prevent the bending seam 5 from being too large and causing breakage when the battery body 1 is bent, thereby providing the battery body 1 with bending while ensuring the safety of its bending state.

[0035] The working principle of the above embodiment is:

[0036] When in use, a bending seam 5 is punched on the positive electrode sheet 2 and the separator 3, and then the positive electrode sheet 2 with the bending seam 5, the negative electrode sheet 4 and the separator 3 are put together and wound to obtain a winding core with the bending seam 5, and with the support of the space of the bending seam 5 itself, the battery body 1 has the performance of bending and deformation.

[0037] The installation method, connection method or setting method disclosed in this embodiment are all common mechanical connection methods.

[0038] Any connection method can be implemented as long as it can achieve its beneficial effects. In addition, the electrical components appearing in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. The technicians in this field can control the electrical components through simple programming, and the existing disclosed power connection technology is also common knowledge in this field, so the specific structural composition and working principle will not be described in detail in this embodiment.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible winding core of a battery, comprising a battery body (1), characterized in that: The battery body (1) comprises a positive electrode sheet (2), a separator (3), and a negative electrode sheet (4); The diaphragm (3) is located between the positive electrode sheet (2) and the negative electrode sheet (4), and more than one diaphragm (3) is arranged between the positive electrode sheet (2) and the negative electrode sheet (4); The outer surface of the positive electrode sheet (2) and the outer surface of the negative electrode sheet (4) are both provided with at least one bending seam (5).

2. The flexible winding core of a battery according to claim 1, characterized in that: in, The bending seams (5) are in the shape of strips, and the bending seams (5) located in the same horizontal transverse direction are distributed at equal intervals, and the bending seams (5) located in the same horizontal longitudinal direction are distributed at equal intervals.

3. The flexible winding core of a battery according to claim 2, characterized in that: The overall length of the bending seam (5) is defined as L1, and 0.5 mm ≤ L1 ≤ 5 mm. The overall width of the bending seam (5) is defined as L 2， And 0.5mm≤L2≤1mm.

4. The flexible winding core of a battery according to claim 3, characterized in that: The depth of the bending seam (5) is defined as L3, and 0.005 mm ≤ L3 ≤ 0.1 mm.

5. The flexible winding core of a battery according to claim 1, characterized in that: in, The bending slits (5) are in a herringbone shape, and the bending slits (5) located in the same horizontal direction are equidistantly distributed, and the bending slits (5) located in the same horizontal vertical direction are equidistantly distributed.

6. The flexible winding core of a battery according to claim 5, characterized in that: The three edges in the bending seam (5) form three angles, which are defined as a1, a2, and a3, respectively, and 30°≤a1≤170°, 30°≤a2≤170°, and 30°≤a3≤170°.

7. The flexible winding core of a battery according to claim 6, characterized in that: The lengths of the three seams in the bending seam (5) are defined as I1, I2, and I3, respectively, and 0.2 mm ≤ I1 ≤ 3 mm, 0.2 mm ≤ I2 ≤ 3 mm, and 0.2 mm ≤ I3 ≤ 3 mm; the depth of the bending seam (5) is defined as h, and 0.03 mm ≤ h ≤ 0.13 mm.

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