阅读说明：本技术 电池组 (Battery pack ) 是由 王汉准 金泰元 于 2020-02-14 设计创作，主要内容包括：提供了一种电池组。该电池组包括：至少两个电池单体；标签片,包括面对至少两个电池单体的粘合表面以及位于背对至少两个电池单体的一侧上的外表面,标签片横跨至少两个电池单体延伸并且使至少两个电池单体结合在一起；以及离型纸块,在至少两个电池单体之间的边界位置处附着到标签片的粘合表面。因此,该电池组可以防止标签片的附着噪声。(A battery pack is provided. The battery pack includes: at least two battery cells; a label sheet including an adhesive surface facing the at least two battery cells and an outer surface on a side facing away from the at least two battery cells, the label sheet extending across the at least two battery cells and bonding the at least two battery cells together; and a release paper block attached to the adhesive surface of the label sheet at a boundary position between the at least two battery cells. Therefore, the battery pack can prevent the attachment noise of the label sheet.)

1. A battery pack, comprising:

at least two battery cells;

a label sheet comprising an adhesive surface facing the at least two battery cells and an outer surface on a side facing away from the at least two battery cells, the label sheet extending across and bonding the at least two battery cells together; and

a release paper block attached to the adhesive surface of the label sheet at a boundary position between the at least two battery cells.

2. The battery pack of claim 1, wherein each of the at least two battery cells comprises:

a pair of main surfaces having a relatively large area and opposing each other;

a pair of side surfaces having a relatively small area and facing each other; and

an edge portion connecting the pair of main surfaces and the pair of side surfaces to each other.

3. The battery pack according to claim 2, wherein the adhesive surface of the label sheet is attached to a plurality of main surfaces adjacent to each other of the plurality of pairs of main surfaces, and

a release paper block is disposed along an edge portion between the plurality of major surfaces to cover a portion of the adhesive surface of the label sheet.

4. The battery pack according to claim 3, wherein a release paper piece covers a concave space formed along an edge portion connecting the plurality of main surfaces and the plurality of pairs of side surfaces to each other.

5. The battery pack according to claim 3, wherein the release paper block extends over the edge portion to a flat portion of the plurality of main surfaces in a width direction of the release paper block.

6. The battery pack according to claim 3, wherein the release paper block includes: first and second release paper blocks arranged in a row at positions spaced apart from each other along edge portions of the at least two battery cells.

7. The battery pack according to claim 6, wherein the first and second release paper blocks have a symmetrical shape with respect to a release paper tangent line extending through a central position between the first and second release paper blocks.

8. The battery pack according to claim 7, wherein the first and second release paper blocks are disposed at opposite positions spaced apart from a tangent of the release paper.

9. The battery pack according to claim 6, wherein the label sheet includes a first label portion and a second label portion that are distinguished from each other by a release paper cut line that forms a boundary between the first label portion and the second label portion and extends through a center position between the first release paper block and the second release paper block.

10. The battery pack of claim 9, wherein the first and second label portions correspond to different regions of the label sheet disposed along the edge portions of the at least two battery cells.

11. The battery pack according to claim 9, wherein the first release paper block is biased to be close to a release paper tangent line formed on one of one side and the other side of the first label portion that are opposite to each other in a length direction of the first release paper block, and

the second release paper block is biased to be close to a release paper cut line formed on one of one side and the other side of the second label portion which are opposite to each other in a length direction of the second release paper block.

12. The battery pack according to claim 6, wherein the first and second release paper blocks respectively include at least two first and second release paper blocks spaced apart from each other in the arrangement direction of the at least two battery cells.

13. The battery pack according to claim 1, wherein the release paper block and the label sheet are spaced apart from one side and the other side opposite to each other in a length direction of the release paper block.

14. The battery pack according to claim 13, wherein the release paper block is provided in the form of islands isolated in the inner region of the label sheet.

15. The battery pack according to claim 1, wherein the release paper block has a bar shape having both ends rounded along one direction.

16. The battery pack according to claim 1, wherein the adhesive surface of the label sheet is exposed by separating a release paper sheet from the label sheet, and

when the release paper sheet is separated from the label sheet, the release paper block is separated from the release paper sheet in a state where the release paper block is attached to the adhesive surface of the label sheet.

17. The battery pack according to claim 16, wherein the release paper sheet is separated from the label sheet while being divided into a first release paper sheet and a second release paper sheet along a release paper cutting line,

the label sheet includes a first label portion and a second label portion which are distinguished from each other along a cut line of the release paper, and

the release paper block includes a first release paper block and a second release paper block attached to the first label portion and the second label portion, respectively.

Technical Field

One or more embodiments relate to a battery pack.

Background

In general, a secondary battery denotes a battery that can be charged and can be recharged, unlike a primary battery that is not rechargeable. Secondary batteries are used as energy sources for devices such as mobile devices, electric vehicles, hybrid electric vehicles, electric bicycles, and uninterruptible power supplies. Depending on the type of external device using the secondary battery, a single unit secondary battery or a plurality of unit secondary batteries (secondary battery packs) in which a plurality of battery cells are electrically connected are used.

Unlike small-sized mobile devices such as cellular phones, which are capable of operating for a certain period of time using a single battery, large-sized mobile devices such as laptop computers, which have long operation times and require high-power driving, or high-power consumption devices such as electric vehicles or hybrid vehicles, may require battery packs, each of which includes a plurality of batteries (cells), in consideration of problems related to power and capacity. The output voltage or output current of such a battery pack may be increased by adjusting the number of batteries included in each battery pack.

Disclosure of Invention

One or more embodiments include a battery pack configured to prevent attachment noise of a label sheet.

Additional features will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosed presented embodiments.

According to one or more embodiments, a battery pack includes: at least two battery cells; a label sheet comprising an adhesive surface facing the at least two battery cells and an outer surface on a side facing away from the at least two battery cells, the label sheet extending across the at least two battery cells and bonding the at least two battery cells together; and a release paper block attached to the adhesive surface of the label sheet at a boundary position between the at least two battery cells.

For example, each of the at least two battery cells may include: a pair of main surfaces having a relatively large area and opposing each other; a pair of side surfaces having a relatively small area and facing each other; and an edge portion connecting the pair of main surfaces and the pair of side surfaces to each other.

For example, the adhesive surface of the label sheet may be attached to a plurality of main surfaces adjacent to each other of the plurality of pairs of main surfaces, and a release paper piece may be provided along an edge portion between the plurality of main surfaces to cover a portion of the adhesive surface of the label sheet.

For example, the release paper piece may cover a concave space formed along an edge portion connecting the plurality of main surfaces and the plurality of pairs of side surfaces to each other.

For example, the release paper block may extend over the edge portion to a flat portion of the plurality of main surfaces in a width direction of the release paper block.

For example, the release paper block may include: first and second release paper blocks arranged in a row at positions spaced apart from each other along edge portions of the at least two battery cells.

For example, the first and second release paper blocks may have a symmetrical shape with respect to a release paper tangent line extending through a central position between the first and second release paper blocks.

For example, the first and second release paper blocks may be disposed at opposite positions spaced apart from a tangent of the release paper.

For example, the label sheet may comprise a first label portion and a second label portion separated from each other by a release liner cut line, the release liner cut line forming a boundary between the first label portion and the second label portion and extending through a central location between the first release liner block and the second release liner block.

For example, the first and second label portions may correspond to different regions of the label sheet disposed along the edge portions of the at least two battery cells.

For example, the first release paper block may be biased to be close to a release paper tangent line formed on one of a side and the other side of the first label portion opposite to each other in a length direction of the first release paper block, and the second release paper block may be biased to be close to a release paper tangent line on one of a side and the other side of the second label portion opposite to each other in a length direction of the second release paper block.

For example, the first and second release paper blocks may include at least two first and second release paper blocks spaced apart from each other in the arrangement direction of the at least two battery cells, respectively.

For example, the release paper block may be spaced apart from one side and the other side of the label sheet that are opposite to each other in the length direction of the release paper block.

For example, the release paper block may be provided in the form of islands isolated in the interior region of the label sheet.

For example, the release paper piece may have a strip shape having both ends rounded along one direction.

For example, the adhesive surface of the label sheet may be exposed by separating the release paper sheet from the label sheet, and when the release paper sheet is separated from the label sheet, the release paper block may be separated from the release paper sheet in a state where the release paper block is attached to the adhesive surface of the label sheet.

For example, the release paper sheet may be separated from the label sheet while being divided into first and second release paper sheets along a release paper cutting line, the label sheet may include first and second label portions distinguished from each other along the release paper cutting line, and the release paper block may include first and second release paper blocks attached to the first and second label portions, respectively.

Drawings

The above and other aspects, features and advantages of the particular embodiments disclosed will become more apparent from the following description when taken in conjunction with the accompanying drawings in which:

fig. 1 is an exploded perspective view illustrating a battery pack according to an embodiment;

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1;

FIG. 3 is a view showing how a release paper sheet is separated from the label sheet shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3 to illustrate how the release paper sheet is separated from the label sheet shown in FIG. 1;

FIG. 5 is a plan view showing the label sheet shown in FIG. 1; and

fig. 6 is a plan view of the label sheet viewed in the VI direction of fig. 1.

Detailed Description

Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as limited to the description set forth herein. Accordingly, the embodiments are described below only by referring to the drawings to explain aspects of the description. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Throughout this disclosure, the expression "at least one of a, b, and c" indicates all of a, b, c, both a and b, both a and c, both b and c, a, b, and c, or their variations.

A battery pack will now be described according to embodiments with reference to the accompanying drawings.

Fig. 1 is an exploded perspective view illustrating a battery pack according to an embodiment. Fig. 2 is a sectional view taken along line II-II of fig. 1. Fig. 3 is a view showing how a release paper sheet is separated from the label sheet shown in fig. 1. Fig. 4 is a cross-sectional view taken along line IV-IV of fig. 3 to illustrate how the release paper sheet is separated from the label sheet shown in fig. 1. Fig. 5 is a plan view illustrating the label sheet shown in fig. 1.

Referring to fig. 1, a battery pack according to an embodiment may include at least two battery cells 10, a label sheet 100 for covering the battery cells 10, and a release paper block 150 attached to the label sheet 100.

The battery pack may further include a frame 50 configured to support the battery cells 10. The frame 50 may include a cell accommodating portion 51 accommodating the battery cell 10 and a circuit accommodating portion 52 accommodating a circuit unit C electrically connected to the battery cell 10 for controlling the charging and discharging operations of the battery cell 10. The label sheet 100 may be attached to the battery cell 10 at the opposite side to the frame 50.

Referring to fig. 1 and 2, each battery cell 10 may include a pair of main surfaces 10a opposite to each other and having a relatively large area and a pair of side surfaces 10b opposite to each other and having a relatively small area. Further, each battery cell 10 may include: a first end portion 11 electrically connected to the circuit unit C while being in contact with both the pair of main surfaces 10a and the pair of side surfaces 10 b; and a second end portion 12 opposite the first end portion 11. An electrode tab 15 may be provided on the first end 11 of the battery cell 10 for connection with the circuit unit C.

An edge portion 10ab may be formed between the main surface 10a and the side surface 10b of the battery cell 10 for connection between the main surface 10a and the side surface 10 b. The edge portion 10ab may be rounded to smoothly connect the main surface 10a and the side surface 10b to each other. The side surfaces 10b of the battery cells 10 adjacent to each other may be adjacent to each other, and the concave space G may extend downward between the rounded edge portions 10ab of the battery cells 10. The concave space G may be formed along an edge portion 10ab extending downward from the main surface 10a of the battery cell 10 along the side surface 10b of the battery cell 10. In the embodiment, the edge portion 10ab connected between the main surface 10a and the side surface 10b of the battery cell 10 may correspond to a long edge portion or a short edge portion of the battery cell 10. In the embodiment shown in fig. 1, an edge portion 10ab connecting between the main surface 10a and the side surface 10b of the battery cell 10 may correspond to a long edge portion of the battery cell 10.

The label sheet 100 may cover the battery cells 10 and may be attached to the battery cells 10 to bond the battery cells 10 together. The label sheet 100 may include an adhesive surface 100a facing the battery cell 10 and an outer surface 100b facing away from the battery cell 10. The adhesive surface 100a of the label sheet 100 may include an adhesive (not shown) for adhering to the battery cell 10, and the outer surface 100b of the label sheet 100 may form an exposed non-adhesive surface facing away from the battery cell 10. The adhesive surface 100a of the label sheet 100 may be attached to the main surfaces 10a of the battery cells 10 adjacent to each other to connect the main surfaces 10a of the battery cells 10 and firmly bond the battery cells 10 together.

In the embodiment, the major surfaces 10a of the battery cells 10 may be entirely or almost entirely covered with the label sheet 100 to enhance bonding between the battery cells 10 adjacent to each other, suppress distortion of the battery cells 10, prevent unstable adhesion of the label sheet 100 caused by distortion of the battery cells 10, and reduce adhesion noise caused by distortion of the battery cells 10.

Referring to fig. 1, the adhesive surface 100a of the label sheet 100 may be exposed by separating a release paper sheet 200 from the label sheet 100. As described later, when the release paper sheet 200 is separated and removed from the label sheet 100, the release paper sheet 200 may be divided into a first release paper sheet 201 and a second release paper sheet 202 along a release paper tangent line L. The release paper tangent line L is for allowing the release paper sheet 200 to be easily removed from the label sheet 100, and thus the release paper sheet 200 can be easily removed from the label sheet 100 while the first and second release paper sheets 201 and 202, which substantially correspond to a half of the release paper sheet 200 along the release paper tangent line L, are separated in opposite directions with respect to the release paper tangent line L.

For reference, in the drawings attached to the present specification, the release paper cut line L is drawn on the label sheet 100 for ease of understanding, but the release paper cut line L is not actually formed on the label sheet 100. That is, a release paper tangent line L is formed on the release paper sheet 200 attached to the label sheet 100 to facilitate separation of the release paper sheet 200 from the label sheet 100. In this sense, for ease of understanding, the release paper cut line L actually formed on the release paper sheet 200 attached or once attached to the label sheet 100 is also drawn on the label sheet 100. Further, the label sheet 100 may include a first label portion 101 and a second label portion 102 having a release paper cut line L as a boundary. The first and second label portions 101, 102 are distinguished from each other along a release paper tangent line L serving as a boundary between the first and second label portions 101, 102, and may be understood as different regions of the label sheet 100 as one continuous sheet, i.e., as different regions on both sides of the release paper tangent line L. As described later, a release paper tangent line L may be formed at a central position between the first and second release paper blocks 151 and 152, and thus, after removing the release paper sheet 200 from the label sheet 100, the release paper tangent line L may correspond to a center line of the label sheet 100 passing through the central position between the first and second release paper blocks 151 and 152.

Referring to fig. 1 and 2, a release paper block 150 may be attached to a portion of the adhesive surface 100a of the label sheet 100 to cover a portion of the adhesive surface 100a of the label sheet 100. The release paper block 150 may be placed between the adhesive surface 100a of the label sheet 100 and the battery cells 10 to prevent adhesion noise that may occur when the adhesive surface 100a of the label sheet 100 is repeatedly adhered to and separated from the battery cells 10. For example, when a bending force or a twisting force is applied to the battery cells 10 that are joined together by the label sheet 100, the battery cells 10 may twist with respect to each other, and thus the joint between the label sheet 100 and the battery cells 10 may become unstable, thereby causing the label sheet 100 to be repeatedly separated from the battery cells 10 and attached to the battery cells 10 while generating attachment noise.

Therefore, according to the embodiment, the release paper piece 150 is attached as a cover to the adhesive surface 100a of the label sheet 100 at a position corresponding to the boundary between the battery cells 10, which may be distorted. Therefore, the adhesive surface 100a is not adhered to the battery cell 10 at the boundary, and thus noise caused by unstable adhesion of the adhesive surface 100a can be prevented.

The release paper block 150 may be attached to the adhesive surface 100a of the label sheet 100 along the edge portion 10ab of the battery cell 10. The adhesive surface 100a of the label sheet 100 may be attached to the main surfaces 10a of the battery cells 10 adjacent to each other, and the release paper piece 150 may be placed between the adhesive surface 100a of the label sheet 100 and the edge portions 10ab between the main surfaces 10a of the battery cells 10 adjacent to each other to prevent the label sheet 100 from being adhered to the battery cells 10 at the edge portions 10 ab.

The release paper block 150 may cover the concave space G formed along the adjacent edge portions 10ab of the battery cells 10 (i.e., along the edge portions 10ab extending downward to connect the main surface 10a and the side surfaces 10b to each other), thereby reducing the attachment noise that may occur when the adhesive surface 100a of the label sheet 100 is unstably repeatedly adhered to and separated from the edge portions 10ab, wherein the concave space is located between the edge portions 10 ab. Specifically, when a bending load or a twisting load is applied to the battery cells 10 joined together by the label sheet 100, twisting may occur at the edge portions 10ab between the battery cells 10, and thus the adhesive surface 100a of the label sheet 100 may repeatedly adhere to and be separated from the edge portions 10ab, causing attachment noise, in which the concave space G is located between the edge portions 10 ab. However, in the embodiment, the adhesive surface 100a of the label sheet 100 is covered to prevent the adhesive surface 100a from adhering to the edge portion 10ab, and thus the cause of the adhesion noise can be removed.

Referring to fig. 1, the release paper block 150 may have a bar shape extending along the adjacent edge portions 10ab of the battery cells 10 and both ends of the release paper block 150 have a rounded shape, for example, the release paper block 150 may have a bar shape having both ends rounded in one direction. In order to be easily separated from the release paper sheet 200, the release paper block 150 has a rounded shape without any angular corners, and thus stress may not be concentrated at a specific position when the release paper block 150 is separated from the release paper sheet 200, thereby preventing the release paper block 150 from being torn or damaged.

The release paper block 150 may have a length extending along the adjacent edge portion 10ab of the battery cell 10 and a width (w) extending in a direction perpendicular to the length. As shown in fig. 2, the release paper block 150 may extend to a portion of the main surface 10a connected to the adjacent edge portion 10ab of the battery cell 10, so that the release paper block 150 may sufficiently cover the adjacent edge portion 10ab of the battery cell 10 in the width direction of the release paper block 150. For example, the edge portion 10ab may have a rounded shape so that the main surface 10a and the side surface 10b forming different planes may be smoothly connected to each other by the edge portion 10ab, and the release paper piece 150 may extend over a boundary between the edge portion 10ab and the main surface 10a to a flat portion of the main surface 10 a. As described above, the release paper piece 150 widely extends to a portion of the main surface 10 a. Therefore, for example, a margin can be secured according to the contact state between the battery cells 10, and unstable contact between the adhesive surface 100a of the label sheet 100 and the adjacent edge portion 10ab can be reliably prevented.

Referring to fig. 1 and 5, the release paper block 150 includes first and second release paper blocks 151 and 152 attached to the adhesive surfaces 100a and 100a of the first and second label portions 101 and 102, respectively. That is, the first release paper block 151 may be attached to the adhesive surface 100a of the first label portion 101 along the adjacent edge portion 10ab of the battery cell 10, and the second release paper block 152 may be attached to the adhesive surface 100a of the second label portion 102 along the adjacent edge portion 10ab of the battery cell 10.

The first and second release paper blocks 151 and 152 may have an elongated shape extending in a length direction thereof in parallel with the adjacent edge portions 10ab of the battery cells 10. For example, the first and second release paper blocks 151 and 152 may be spaced apart from each other and arranged in rows along the adjacent edge portions 10ab of the battery cells 10. As described above, the first and second release paper blocks 151 and 152 may be arranged along the edge portion 10ab of the battery cell 10, and the first and second label portions 101 and 102, which are distinguished by the release paper tangent line L extending between the first and second release paper blocks 151 and 152, may correspond to different regions of the label sheet 100 along the edge portion 10ab of the battery cell 10.

In an embodiment, the first and second release paper blocks 151 and 152 may be symmetrical in position and shape with respect to the release paper tangent line L. For example, the first and second release paper blocks 151 and 152 may be spaced apart from the release paper tangent line L by the same distance. In this case, the release paper tangent line L may extend through a central position between the first release paper block 151 and the second release paper block 152. For example, the distance d1 between the cut line L of the release paper and the first release paper block 151 may be equal to the distance d2 between the cut line L of the release paper and the second release paper block 152.

The first release paper block 151 and the second release paper block 152 may be located at positions spaced apart from each other, wherein a release paper tangent line L is located between the first release paper block 151 and the second release paper block 152. That is, the interval d1 from the first release paper block 151 to the release paper tangent line L and the interval d2 from the second release paper block 152 to the release paper tangent line L may be set to be greater than zero, and in this case, the release paper sheet 200 may be easily separated from the label sheet 100 because the first release paper block 151 and the second release paper block 152 are spaced apart from the release paper tangent line L.

For example, the first and second release paper blocks 151 and 152 may be provided in the form of islands which are isolated in the inner regions of the first and second label portions 101 and 102 and separated from one sides (the side corresponding to the release paper tangent line L, the same below) of the first and second label portions 101 and 102 and the other sides S1 and S2 of the first and second label portions 101 and 102, so that the first and second release paper blocks 151 and 152 may not intersect the one sides (the side corresponding to the release paper tangent line L) and the other sides S1 and S2 facing each other in the length direction of the first and second release paper blocks 151 and 152. For reference, one side (a side corresponding to a release paper tangent line L) and the other sides S1 and S2 in the length direction of the first and second release paper blocks 151 and 152 may represent one side (a side corresponding to the release paper tangent line L) and the other sides S1 and S2 of the first and second label portions 101 and 102, and may also represent one side (a side corresponding to the release paper tangent line L) and the other sides S1 and S2 of the first and second release paper sheets 201 and 202 (refer to fig. 3).

The expression that the first and second release paper blocks 151 and 152 are provided in the form of islands isolated in the inner regions of the first and second label portions 101 and 102 may mean that the first and second release paper blocks 151 and 152 are provided in the form of islands isolated in the inner regions of the first and second release paper sheets 201 and 202 (refer to fig. 3). That is, the first and second release paper blocks 151 and 152 may be disposed in an inner region of the first and second release paper sheets 201 and 202 (refer to fig. 3) separated from one sides (sides corresponding to the release paper tangent line L) and the other sides S1 and S2 of the first and second release paper sheets 201 and 202 (refer to fig. 3) in the length direction of the first and second release paper blocks 151 and 152.

Referring to fig. 3 and 4, when separating the release paper sheet 200 from the label sheet 100, a separation tension may be applied in a direction from a corner of the first release paper sheet 201 along one side of the first release paper sheet 201 (a side corresponding to a release paper tangent line L) or the other side S1 of the first release paper sheet 201. In this case, since the first release paper block 151 is disposed in the inner area of the first release paper sheet 201 separated from the one side (the side corresponding to the release paper tangent line L) and the other side S1, the first release paper block 151 does not hinder the separation of the first release paper sheet 201 from the label sheet 100, and can be smoothly separated from the first release paper sheet 201 after the first release paper sheet 201 is slightly separated from the label sheet 100.

For example, when the release sheet 200 is separated from the label sheet 100, the first release paper sheet 201 may be separated from the label sheet 100 while applying a separation tension to the first release paper sheet 201 in a direction along one side of the first release paper sheet 201 (release paper tangent line L or the other side S1, the same hereinafter) from a corner of the first release paper sheet 201. In this case, for smooth separation of the first release paper sheet 201 from the separation start point P11 to the separation end point P2 along one side of the first release paper sheet 201 (release paper tangent line L), a uniform separation resistance along one side of the first release paper sheet 201 (release paper tangent line L) may be required.

If the first release paper block 151 is in contact with one side (the release paper tangent line L) of the first release paper sheet 201, the separation process may face different resistance or relatively high resistance due to the first release paper block 151 being separated from the first release paper sheet 201 at a position P5 corresponding to the first release paper block 151, in which a uniform separation tension is applied to the first release paper sheet 201 along one side (the release paper tangent line L) of the first release paper sheet 201 from the separation start point P11 to the separation end point P2 against the separation resistance caused by the adhesive force of the label sheet 100. Therefore, the first release paper sheet 201 is not smoothly separated from the label sheet 100, and the separation of the first release paper sheet 201 may be stopped at a position P5 corresponding to the first release paper block 151 due to physical interference between the first release paper block 151 and the first release paper sheet 201. Due to such a separation error, the separation process may have to be performed again. That is, the separation resistance occurring when the first release paper block 151 is separated from the first release paper sheet 201 may be a discontinuous resistance different from the separation resistance caused by the adhesive force of the label sheet 100, and may be greater than the separation resistance caused by the adhesive force of the label sheet 100. Accordingly, the worker may adjust the tension at the position P5 corresponding to the first release paper block 151 while applying a uniform tension to perform the separation process, and may need to perform the separation process again due to poor or improper separation of the first release paper block 151 from the first release paper sheet 201. In the embodiment, the first release paper block 151 is disposed in an inner region of the first release paper sheet 201 separated from the one side (the release paper tangent line L), and thus, after the first release paper sheet 201 is slightly separated from the label sheet 100 in one direction from the one side (the release paper tangent line L), the first release paper block 151 may be smoothly separated from the first release paper sheet 201.

Referring to fig. 5, the first release paper block 151 may be disposed at a position distant from one side (release paper tangent line L) and the other side S1 of the first label portion 101, in which case one of the one side (release paper tangent line L) and the other side S1 of the first label portion 101 may be closer to the first release paper block 151 than the other. In an embodiment, the first release paper block 151 may be disposed at a position relatively close to a release paper tangent line L formed on one side of the first label portion 101, i.e., at a position offset toward the release paper tangent line L in a length direction of the first release paper block 151. For example, the first release paper block 151 may be spaced apart from the release paper tangent 201, wherein a spacing d1 between the first release paper block 151 and the release paper tangent 201 is greater than about 0 mm. For example, the spacing d1 may be about 2.5 mm.

Since the first release paper block 151 is biased toward the release paper tangent line L formed at the center position of the battery cell 10, it is possible to effectively reduce the adhesion noise that may occur strongly at the center position of the battery cell 10. For example, when the attachment of the label sheet 100 to the battery cell 10 is unstable due to the distortion of the battery cells 10 joined together by the label sheet 100, attachment noise may be caused, and because the battery cells 10 may be distorted in a form in which reverse distortion repeatedly occurs along the central axis, the attachment noise may be strongly generated at the central position of the battery cell 10.

At the center position of the battery cell 10, the first and second release paper blocks 151 and 152 may be arranged with a small interval d12 therebetween such that the first and second release paper blocks 151 and 152 may be adjacent to each other, and an interval d12 between the first and second release paper blocks 151 and 152 may be smaller than an interval h1 between the first release paper block 151 and the other side S1 of the first label portion 101 or an interval h2 between the second release paper block 152 and the other side S2 of the second label portion 102. In other words, a distance d1 between the first release paper block 151 and the release paper tangent line L, which corresponds to approximately half of a distance d12 between the first release paper block 151 and the second release paper block 152, may be smaller than a distance h1 between the first release paper block 151 and the other side S1 of the first label portion 101. That is, the first release paper block 151 may be located at a position biased toward the release paper tangent line L.

The distance d12 between the first release paper block 151 and the second release paper block 152 corresponds to the sum of the distance d1 between the first release paper block 151 and the release paper tangent L and the distance d2 between the second release paper block 152 and the release paper tangent L, and when the distance d1 between the first release paper block 151 and the release paper tangent L is equal to the distance d2 between the second release paper block 152 and the release paper tangent L, the distance d12 between the first release paper block 151 and the second release paper block 152 may be twice the distance d1 between the first release paper block 151 and the release paper tangent L, or the distance d1 between the first release paper block 151 and the release paper tangent L may be half the distance d12 between the first release paper block 151 and the second release paper block 152.

Similar to the first release paper block 151, the second release paper block 152 may be provided in the form of an island which is isolated in an inner region of the second label portion 102 and separated from one side (corresponding to the release paper tangent line L, the same hereinafter) and the other side S2 of the second label portion 102, so that the second release paper block 152 may not intersect the one side (corresponding to the side of the release paper tangent line L) and the other side S2 facing each other in the length direction of the second release paper block 152. The expression "the second release paper block 152 is provided in the form of islands isolated in the inner region of the second label portion 102" may indicate that the second release paper block 152 is provided in the form of islands isolated in the inner region of the second release paper sheet 202 (refer to fig. 3). That is, the second release paper block 152 may be disposed in an inner region of the second release paper sheet 202 (refer to fig. 3) separated from one side (release paper tangent line L) and the other side S2 of the second release paper sheet 202 (refer to fig. 3) in the length direction of the second release paper block 152.

Referring to fig. 3 and 4, when the second release paper sheet 202 is separated from the label sheet 100, a separation tension may be applied in a direction from a corner of the second release paper sheet 202 along one side (release paper tangent line L) of the second release paper sheet 202 or the other side S2 of the second release paper sheet 202. In this case, since the second release paper block 152 is disposed in the inner region of the second release paper sheet 202 separated from the one side (release paper tangent line L) and the other side S2, the second release paper sheet 202 may be smoothly separated from the separation start point P21 to the separation end point P2, for example, along the one side (release paper tangent line L) of the second release paper sheet 202, and after the second release paper sheet 202 is slightly separated from the label sheet 100 in one direction from the one side (release paper tangent line L), the second release paper block 152 may be smoothly separated from the second release paper sheet 202 at the position P5 corresponding to the second release paper block 152.

Referring to fig. 5, the second release paper block 152 may be disposed at a position distant from one side (release paper tangent line L) and the other side S2 of the second label portion 102, and in this case, one of the one side (release paper tangent line L) and the other side S2 of the second label portion 102 may be closer to the second release paper block 152 than the other. In an embodiment, the second release paper block 152 may be relatively close to the release paper tangent line L formed on one side of the second label portion 102, and the distance d2 between the second release paper block 152 and the release paper tangent line L may be greater than about 0mm, so that the second release paper block 152 may be spaced apart from the release paper tangent line L. For example, the spacing d2 between the second release paper block 152 and the release paper tangent line L may be about 2.5 mm.

Fig. 6 is a plan view of the label sheet 100 viewed in the VI direction of fig. 1.

Referring to fig. 1 and 6, the label sheet 100 may include a folded portion (f) folded along an edge of the frame 50 to surround the frame 50 in which the battery cell 10 is received. In the length direction of the release paper block 150, the center position at which the release paper tangent line L is formed may be closer to the release paper block 150 than the edge along which the folded portion (f) is formed. For example, the interval d12 between the first and second release paper blocks 151 and 152 may be smaller than the interval r1 between the first release paper block 151 and the folded part (f) or the interval r2 between the second release paper block 152 and the folded part (f). For example, the interval d12 between the first and second release paper blocks 151 and 152 may be smaller than the interval r1 between the first release paper block 151 and the folded part (f). However, the distance d12 between the first and second release paper blocks 151 and 152 may be equal to the distance r2 between the second release paper block 152 and the folded portion (f). Since the second end portion 12 of the battery cell 10 is more susceptible to bending or twisting causing adhesion noise than the first end portion 11 of the battery cell 10 coupled to the circuit unit C, it is to effectively reduce the adhesion noise by placing the release paper piece 150 at a position closer to the second end portion 12 of the battery cell 10 than the first end portion 11 of the battery cell 10.

Referring to fig. 3 and 4, a perforated or thin portion having a relatively small thickness may be formed in the release paper sheet 200 along the contour T of the first and second release paper blocks 151 and 152 to facilitate separation of the first and second release paper blocks 151 and 152 from the release paper sheet 200. When the first and second release paper sheets 201 and 202 are separated from the label sheet 100, the first and second release paper blocks 151 and 152 can be separated from the first and second release paper sheets 201 and 202. For example, when the first release paper sheet 201 is separated from the label sheet 100, the first release paper block 151 attached to the label sheet 100 may remain on the label sheet 100 and may thus be separated from the first release paper sheet 201. Similarly, when the second release paper sheet 202 is separated from the label sheet 100, the second release paper block 152 attached to the label sheet 100 may remain on the label sheet 100 and may thus be separated from the second release paper sheet 202.

Referring to fig. 1, the number of the battery cells 10 may be at least two, and in an embodiment, the number of the battery cells 10 may be three. In this case, the label sheet 100 may extend over the three battery cells 10 and may be attached to the three battery cells 10, and two release paper pieces 150 may be provided on the label sheet 100 in such a manner that the two release paper pieces 150 are spaced apart from each other in the arrangement direction of the three battery cells 10.

For example, the first release paper block 151 may include two first release paper blocks 151 spaced apart from each other in the arrangement direction of the battery cells 10, and similarly, the second release paper block 152 may include two second release paper blocks 152 spaced apart from each other in the arrangement direction of the battery cells 10. In the present disclosure, the number of the battery cells 10 is not limited, and the release paper block 150 may be provided at each edge portion 10ab corresponding to a boundary between the battery cells 10 adjacent to each other in the arrangement direction of the battery cells 10.

As described above, according to one or more of the above embodiments, the release paper block is disposed at a predetermined position of the adhesive surface of the label sheet attached to the adjacent battery cell, thereby preventing unstable attachment of the label sheet at the boundary of the adjacent battery cell and attachment noise that may occur when the label sheet is repeatedly adhered to and separated from the battery cell at the boundary.

It is to be understood that the embodiments described herein are to be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should generally be considered as available for other similar features or aspects in other embodiments. While one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope as defined by the following claims.