阅读说明：本技术 电池组 (Battery pack ) 是由 安姜植 于 2021-05-21 设计创作，主要内容包括：一种电池组,包括：电池单元；主电路板,电连接到所述电池单元并且在第一方向上延伸；子电路板,与所述主电路板平行地重叠所述主电路板,并且通过可折叠的柔性布线连接到所述主电路板,所述子电路板包括连接到所述柔性布线的第一端和在其上包括外部输入/输出端子的第二端；以及板保持器,容纳所述主电路板,所述板保持器在其上包括卡扣片,其中所述卡扣片被构造用于与重叠所述主电路板的所述子电路板物理干涉。(A battery pack, comprising: a battery cell; a main circuit board electrically connected to the battery cell and extending in a first direction; a sub circuit board overlapping the main circuit board in parallel with the main circuit board and connected to the main circuit board by foldable flexible wirings, the sub circuit board including a first end connected to the flexible wirings and a second end including external input/output terminals thereon; and a board holder accommodating the main circuit board, the board holder including a snap tab thereon, wherein the snap tab is configured to physically interfere with the sub circuit board overlapping the main circuit board.)

1. A battery pack, comprising:

a battery cell;

a main circuit board electrically connected to the battery cell and extending in a first direction;

a sub circuit board overlapping the main circuit board in parallel with the main circuit board and connected to the main circuit board by a flexible wiring, the sub circuit board including a first end connected to the flexible wiring and a second end including an external input/output terminal thereon; and

a board holder accommodating the main circuit board, the board holder including a snap tab thereon,

wherein the snap tab is configured to physically interfere with the daughter circuit board overlaying the board retainer.

2. The battery pack of claim 1, wherein the plate holder extends parallel to the main circuit board in the first direction.

3. The battery pack of claim 1, wherein the plate holder further comprises:

a first main wall and a second main wall extending in the first direction and facing each other, the first main wall and the second main wall accommodating the main circuit board therebetween;

a first termination end and a second termination end between an end of the first main wall and an end of the second main wall;

a bottom surrounded by the first and second main walls and the first and second terminal ends; and

an opening opposite the bottom, the opening being open to receive the main circuit board.

4. The battery pack according to claim 3, wherein the first terminating end at which the board holder terminates in the first direction includes an end opening, the first direction being a direction from the main circuit board toward the flexible wiring.

5. The battery pack of claim 4 wherein the end openings provide channels through which the main circuit board received in the board holder is connected to the sub circuit board.

6. The battery pack according to claim 4, wherein the flexible wiring passes through the end opening and connects the main circuit board with the sub circuit board, the main circuit board being disposed inside the board holder, the sub circuit board being disposed outside the board holder.

7. The battery pack of claim 6 wherein the first terminal end includes a rounded portion having a rounded shape.

8. The battery pack of claim 7 wherein the flexible wiring passes through the end opening and is folded around the rounded portion of the first terminal end.

9. The battery pack of claim 3, wherein a major portion of the sub-circuit board is on the first major wall.

10. The battery pack of claim 3 wherein the snap tab is on the first major wall.

11. The battery pack of claim 10, wherein the snap tab is configured to physically interfere with the second end of the daughter circuit board.

12. The battery pack of claim 11, wherein:

the first main wall includes a middle opening into which the second end of the sub circuit board is insertable, and

the snap tab is a central opening wall defining one side of the central opening.

13. The battery pack according to claim 12, wherein the intermediate opening is between both ends of the board holder in the first direction.

14. The battery pack of claim 12, wherein:

a main portion of the sub circuit board is on the first main wall, and

the second end of the sub circuit board is inserted into the first main wall through the intermediate opening such that the second end is fitted between the main circuit board and the snap piece.

15. The battery pack of claim 3, wherein the board retainer further comprises a protruding rib protruding from the first main wall and configured to physically interfere with the daughter circuit board on the first main wall.

16. The battery pack according to claim 15, wherein the protruding rib is at one lateral end of the first main wall in a second direction intersecting the first direction.

17. The battery pack according to claim 15, wherein the sub circuit board includes a recess into which the protruding rib is insertable.

18. The battery pack according to claim 17, wherein the recess is at one lateral end of the sub circuit board in a second direction intersecting the first direction.

19. The battery pack of claim 18, wherein the recess is in an edge of the sub circuit board and opens in an outward direction.

20. The battery pack of claim 1, wherein:

the main circuit board is a rigid circuit board, and

the sub circuit board and the flexible wiring are a single circuit board that is flexible.

Technical Field

Embodiments relate to a battery pack.

Background

In general, a secondary battery refers to a battery that can be repeatedly charged and recharged, unlike a primary battery that is not rechargeable. The secondary battery may be used as an energy source for devices such as mobile devices, electric vehicles, hybrid electric vehicles, electric bicycles, and uninterruptible power supplies. Depending on the type of equipment to which the secondary battery is applied, a single cell secondary battery or a multi-cell secondary battery (battery pack) each including a plurality of battery cells connected to each other as a cell may be used.

A small-sized mobile device such as a cellular phone may operate for a predetermined time using a single cell type secondary battery. However, the battery pack having high-output, high-capacity characteristics may be suitable for devices having a long operation time and consuming a large amount of electric power, such as electric vehicles and hybrid electric vehicles. The output voltage or current of the battery pack may be increased by adjusting the number of battery cells included in the battery pack.

Disclosure of Invention

Embodiments may be realized by providing a battery pack including: a battery cell; a main circuit board electrically connected to the battery cell and extending in a first direction; a sub circuit board overlapping the main circuit board in parallel with the main circuit board and connected to the main circuit board by a flexible wiring, the sub circuit board including a first end connected to the flexible wiring and a second end including an external input/output terminal thereon; and a board holder accommodating the main circuit board, the board holder including a catch tab thereon, wherein the catch tab is configured to physically interfere with the sub circuit board overlapping the board holder.

The board holder may extend parallel to the main circuit board in the first direction.

The board holder may further include: a first main wall and a second main wall extending in the first direction and facing each other, the first main wall and the second main wall accommodating the main circuit board therebetween; a first termination end and a second termination end between an end of the first main wall and an end of the second main wall; a bottom surrounded by the first and second main walls and the first and second terminal ends; and an opening opposite the bottom, the opening being open to receive the main circuit board.

The first terminating end at which the board holder terminates in the first direction may include an end opening, the first direction being a direction from the main circuit board toward the flexible wiring.

The end opening may provide a channel through which the main circuit board received in the board holder is connected to the sub circuit board.

The flexible wiring may pass through the end opening and connect the main circuit board with the sub circuit board, the main circuit board being disposed inside the board holder, the sub circuit board being disposed outside the board holder.

The first terminal end may include a rounded portion having a rounded shape.

The flexible wiring may pass through the end opening and may be folded around the rounded portion of the first termination end.

A major portion of the sub circuit board may be on the first main wall.

The snap tab may be on the first major wall.

The snap tab may be configured to physically interfere with the second end of the daughter circuit board.

The first main wall may include a middle opening into which the second end of the sub circuit board is insertable, and the catching piece may be a middle opening wall defining one side of the middle opening.

The intermediate opening may be between both ends of the board holder in the first direction.

A main portion of the sub circuit board may be on the first main wall, and the second end of the sub circuit board may be inserted into the first main wall through the intermediate opening such that the second end is fitted between the main circuit board and the snap piece.

The board holder may further include a protruding rib protruding from the first main wall and configured to physically interfere with the sub circuit board on the first main wall.

The protruding rib may be at one lateral end of the first main wall in a second direction intersecting the first direction.

The sub circuit board may include a recess into which the protruding rib is insertable.

The recess may be at one lateral end of the sub circuit board in a second direction intersecting the first direction.

The recess may be in an edge of the sub circuit board and open in an outward direction.

The main circuit board may be a rigid circuit board, and the sub circuit board and the flexible wiring may be a single circuit board that is flexible.

Drawings

Features will be apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

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

fig. 2 is an exploded perspective view of a portion of the battery pack shown in fig. 1;

fig. 3A and 3B are a perspective view and a plan view of a state in which the sub circuit board shown in fig. 2 is unfolded;

fig. 4A and 4B are a perspective view and a plan view of a state in which the sub circuit board shown in fig. 2 is folded;

FIG. 5 is an enlarged view of the physical interference between the daughter circuit board and the snap tab shown in FIG. 2; and

fig. 6 is an enlarged view of physical interference between the sub circuit board and the protruding rib shown in fig. 2.

Detailed Description

Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, it may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary embodiments to those skilled in the art.

In the drawings, the size of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when a layer or element is referred to as being "on" another layer or element, it can be directly on the other layer or element or intervening layers may also be present. In addition, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. Like reference numerals refer to like elements throughout.

As used herein, the terms "or" and/or "include any and all combinations of one or more of the associated listed items. Expressions such as "at least one of" modify an entire column of elements before one column of elements without modifying individual elements in the column.

Hereinafter, a battery pack will be described according to embodiments with reference to the accompanying drawings.

Fig. 1 is an exploded perspective view of a battery pack according to an embodiment. Fig. 2 is an exploded perspective view of a portion of the battery pack shown in fig. 1. Fig. 3A and 3B are a perspective view and a plan view of a state in which the sub circuit board shown in fig. 2 is unfolded. Fig. 4A and 4B are a perspective view and a plan view of a state in which the sub circuit board 220 shown in fig. 2 is folded. Fig. 5 is an enlarged view of physical interference between the sub circuit board and the catching piece S shown in fig. 2. Fig. 6 is an enlarged view of physical interference between the sub circuit board and the protruding rib P shown in fig. 2.

Referring to fig. 1 and 2, according to an embodiment, a battery pack may include: a battery cell C; a main circuit board 210 electrically connected to the battery cells C and extending in a first direction Z1 (e.g., a longitudinal direction); and a sub circuit board 220 overlapping the main circuit board 210 in parallel with the main circuit board 210 and connected to the main circuit board 210 through a foldable flexible wiring portion or flexible wiring 230. In an embodiment, the sub circuit board 220 may include a first end portion or end 221 connected to the flexible wiring 230 and a second end portion or end 222 including an external input/output terminal T thereon. The battery pack may further include a board holder 100, the board holder 100 receiving the main circuit board 210 and including a snap tab S thereon, the snap tab S being configured to physically interfere with (e.g., press or hold) the sub circuit board 220 of the overlapping board holder 100. In an embodiment, the snap tabs S may help prevent the daughter circuit board 220 from unfolding in the direction in which the daughter circuit board 220 is lifted from the main circuit board 210 (e.g., the folded daughter circuit board 220 may be held against or adjacent to the main circuit board 210).

The battery cell C may include: an electrode assembly 10 and a case 15, and an electrolyte is sealed in the case 15 together with the electrode assembly 10. In an embodiment, the case 15 may include a terrace 11, and the first electrode E1 and the second electrode E2 (electrically connected to the electrode assembly 10) extend outward from the terrace 11. The main circuit board 210 may be electrically connected to the first electrode E1 and the second electrode E2, and the board holder 100 accommodating the main circuit board 210 may be disposed on the platform part 11.

In an embodiment, the electrode assembly 10 may include first and second electrode plates having different polarities, and a separator between the first and second electrode plates. The electrode assembly 10 may be formed in a roll type by winding the first and second electrode plates with the separator therebetween, or in a stack type by stacking a plurality of first and second electrode plates with the separator therebetween.

The main circuit board 210 (connected to the first and second electrodes E1 and E2) and the board holder 100 (in which the main circuit board 210 is accommodated) may be disposed on the platform part 11 (from which the first and second electrodes E1 and E2 of the battery cell C extend outward). The charge and discharge path of the battery cell C may be connected to the external input/output terminal T of the sub circuit board 220 (overlapping the main circuit board 210) through the main circuit board 210 connected to the first electrode E1 and the second electrode E2.

The main circuit board 210 may be electrically connected to the battery cell C and may be part of a charge and discharge path of the battery cell C, for example, the main circuit board 210 may be connected to the first electrode E1 and the second electrode E2 of the battery cell C. The main circuit board 210 may be electrically connected to the sub circuit board 220 (including the external input/output terminal T thereon) and may form a part of a charge and discharge path between the battery cell C and the external input/output terminal T of the sub circuit board 220. The main circuit board 210 may be on the stage part 11 (from which the first and second electrodes E1 and E2 extend outward) of the battery cell C, and may extend in a first direction Z1 (e.g., a longitudinal direction), the first direction Z1 being parallel to a longitudinal extension direction of the stage part 11. As described below, the sub circuit board 220 electrically connected to the main circuit board 210 may also extend in the first direction Z1 (e.g., the longitudinal direction), for example, parallel to the main circuit board 210. For reference, throughout the present specification, the first direction Z1 may refer to a longitudinal direction of the main circuit board 210 and the sub circuit board 220, and when used in a limiting sense in a more specific definition, the first direction Z1 may refer to a direction from the main circuit board 210 toward the flexible wiring 230. In addition, the second direction Z2 may refer to a lateral direction of the main circuit board 210 and the sub circuit board 220, and may be a direction intersecting the first direction Z1 (e.g., perpendicularly intersecting the first direction Z1).

Unlike the sub circuit board 220, the main circuit board 210 may be, for example, a relatively rigid circuit board, and a plurality of circuit devices may be disposed on the main circuit board 210 such that the main circuit board 210 may control charging and discharging operations of the battery cells C in response to abnormal conditions such as overheating, overcharge, or overdischarge of the battery cells C when the main circuit board 210 forms a charging and discharging path between the battery cells C and the sub circuit board 220. In an embodiment, the main circuit board 210 may function as a Battery Management System (BMS) that monitors status information such as the temperature, voltage, and current of the battery cells C, and may facilitate protective measures such as stopping the charging or discharging operation of the battery cells C when the BMS detects an abnormal situation. In an embodiment, unlike the sub circuit board 220, the main circuit board 210 may be a relatively rigid circuit board. In an embodiment, the main circuit board 210 may be a flexible circuit board similar to the sub circuit board 220.

The sub circuit board 220 may extend parallel to the main circuit board 210 in the first direction Z1, and may overlap the main circuit board 210 in parallel. In an embodiment, the sub circuit board 220 may overlap the main circuit board 210 by foldable flexible wiring 230, for example, the sub circuit board 220 may be bent to overlap and be parallel to the main circuit board. In an embodiment, the flexible wiring 230 and the sub-circuit board 220 may be a one-piece unitary structure, and the flexible wiring 230 and the sub-circuit board 220 may be one single flexible circuit board. In an embodiment, an end portion of the flexible circuit board may be in the form of a flexible film, may be folded from the main circuit board 210 and connect another portion of the flexible circuit board and the main circuit board 210 to each other, may correspond to the flexible wiring 230, and another portion of the flexible circuit board may correspond to the sub circuit board 220. In an embodiment, the flexible circuit board (e.g., the flexible wiring 230 and the sub circuit board 220) may be in the form of a flexible film, and thus may be foldable.

In an embodiment, in a flexible circuit board, for example, in which the flexible wiring 230 and the sub circuit board 220 are a one-piece structure, an end portion connected to the main circuit board 210 and extending from the main circuit board 210 in a curved form may correspond to the flexible wiring 230, and the remaining portion extending from the end portion of the flexible wiring 230 in the first direction Z1 (e.g., longitudinal direction) may correspond to the sub circuit board 220.

In an embodiment, in a flexible circuit board, for example, where the flexible wiring 230 and the sub circuit board 220 are a one-piece structure, a position at which the folding or bending of the flexible circuit board ends (for example, a position at which the flexible circuit board starting from the bending of the main circuit board 210 extends flat or straight in the first direction Z1) may correspond to a boundary between the flexible wiring 230 and the sub circuit board 220. In an embodiment, a boundary between the flexible wiring 230 and the sub circuit board 220 may correspond to the first end 221 of the sub circuit board 220.

In an embodiment, the sub circuit board 220 may be a relatively rigid circuit board similar to the main circuit board 210, and the flexible wiring 230 may be a flexible film circuit board foldable between the main circuit board 210 and the sub circuit board 220 (e.g., a rigid circuit board). In an embodiment, the flexible wiring 230 may be a foldable flexible film circuit board, and the sub circuit board 220 may also be formed as a flexible circuit board similar to the flexible wiring 230. In an embodiment, the flexible wiring 230 and the sub circuit board 220 may be formed of or as a single flexible circuit board.

The sub circuit board 220 may include a first end 221 connected to the flexible wiring 230 and a second end 222 including an external input/output terminal T thereon. The sub circuit board 220 may be connected to the main circuit board 210 through a flexible wiring 230, and a charge and discharge path may be formed between the main circuit board 210 and the external input/output terminal T. The flexible wiring 230 may be disposed between the main circuit board 210 and the sub circuit board 220, and may electrically connect the main circuit board 210 and the sub circuit board 220 to each other. In an embodiment, the flexible wiring 230 may be connected to the main circuit board 210 and the sub circuit board 220 by a thermal bonding method such as soldering or soldering. In an embodiment, the flexible wiring 230 may be disposed between the first end 221 of the sub circuit board 220 and an end of the main circuit board 210 in the first direction Z1 (e.g., in the first direction Z1 from the main circuit board 210 toward the flexible wiring 230). In an embodiment, the flexible wiring 230 and the sub circuit board 220 may be formed as one flexible circuit board, and in this case, the flexible wiring 230 and the sub circuit board 220 may be a one-piece flexible circuit board, and an additional process such as a soldering or soldering process for connecting the flexible wiring 230 and the sub circuit board 220 to each other may not be used.

The sub circuit board 220 may overlap the main circuit board 210 by being folded at the flexible wiring 230. Throughout this specification, the folding or unfolding of the sub circuit board 220 may actually refer to the folding or unfolding of the flexible wiring 230 to allow the sub circuit board 220 to overlap the main circuit board 210 (e.g., folding, refer to fig. 4A and 4B), or to lift or move the sub circuit board 220 away from the main circuit board 210 at will (e.g., unfolding, refer to fig. 3A and 3B). For reference, fig. 3A and 3B show a state in which the sub circuit board 220 is completely unfolded into the same plane as the main circuit board 210. In an embodiment, the battery pack may be provided by folding the sub circuit board 220 as shown in fig. 4A and 4B from a state in which the sub circuit board 220 is unfolded as shown in fig. 3A and 3B, and in this regard, fig. 3A, 3B, 4A and 4B may be understood as a view sequentially showing some processes for forming the battery pack according to the embodiment. In addition, throughout the present specification, the folding or unfolding of the sub circuit board 220 may actually mean the folding or unfolding of the flexible wiring 230 or the folding or unfolding at the flexible wiring 230, and for ease of understanding, the folding or unfolding of the flexible wiring 230 may be hereinafter referred to as the folding or unfolding of the sub circuit board 220.

In an embodiment, referring to fig. 2, the battery pack may include a board holder 100, the board holder 100 including a snap tab S configured to maintain the folded state of the sub circuit board 220 to overlap the main circuit board 210, and to help prevent the sub circuit board 220 from unfolding upward, outward, or away from the main circuit board 210. Throughout this specification, the description that the sub circuit board 220 overlaps the main circuit board 210 or that the sub circuit board 220 is folded onto the main circuit board 210 may mean that the sub circuit board 220 overlaps the board holder 100 in which the main circuit board 210 is accommodated, or that the sub circuit board 220 is folded onto the board holder 100 in which the main circuit board 210 is accommodated.

Board holder 100 can receive main circuit board 210 or at least a portion of main circuit board 210 to help insulate and protect main circuit board 210. The board holder 100 may be on the stage part 11 of the battery cell C together with the main circuit board 210.

Referring to fig. 2, the board holder 100 may extend in the first direction Z1 (e.g., longitudinal direction) in parallel to the main circuit board 210, and may include, for example, a first main wall 101 and a second main wall 102 that extend in the first direction Z1 (e.g., longitudinal direction) while facing each other, and may accommodate the main circuit board 210 between the first main wall 101 and the second main wall 102. The sheet retainer 100 may include a first terminating end 103 and a second terminating end 104, the first and second terminating ends 103 and 104 being between the ends of the first and second main walls 101 and 102 in the first direction Z1. The sheet retainer 100 may further include a bottom B surrounded by the first and second main walls 101 and 102 and the first and second terminating ends 103 and 104; and an open portion or opening OP opposite to the bottom B and opened to receive the main circuit board 210. In an embodiment, the bottom B and the opening OP may face each other in a second direction Z2 that intersects the first direction Z1 (e.g., the direction in which the board holder 100 extends).

A rounded or rounded portion R may be on or at the first terminating end 103, and the first terminating end 103 may help support the flexible wiring 230, and the flexible wiring 230 may be folded around the rounded portion R. In an embodiment, the rounded portion R may be on or at the first terminating end 103, e.g., the board holder 100 terminates at the first terminating end 103 in the first direction Z1, and the rounded portion R may help support the flexible wiring 230, which the flexible wiring 230 may be folded around. In an embodiment, the rounded portion R may have a rounded shape over all or a portion of the first terminal end 103.

The open ended EO may be in the first terminal end 103 or at the first terminal end 103. The open-ended EO may provide a channel through which the main circuit board 210 (housed in the board holder 100) may be connected to the sub circuit board 220, for example, the flexible wiring 230 may be inserted into the open-ended EO or may extend through the open-ended EO, so that the main circuit board 210 and the sub circuit board 220 (which may be disposed inside and outside the board holder 100) may be connected to each other through the flexible wiring 230.

In an embodiment, the end opening EO may be in the first terminating end 103 or at the first terminating end 103 (where the plate holder 100 terminates in the first direction Z1). The end of the main circuit board 210 or the flexible wiring 230 connected to the end of the main circuit board 210 may extend outward from the board holder 100 through the end opening EO, and when the flexible wiring 230 extending outward from the board holder 100 is folded, the flexible wiring 230 may be connected to the overlapped board holder 100 or the sub circuit board 220 folded around the board holder 100.

In an embodiment, the flexible wiring 230 passing through the end opening EO may be folded onto the board holder 100 or folded around the board holder 100 while surrounding the rounded portion R of the first terminating end 103 (where or at which the end opening EO is formed). In an embodiment, the rounded portion R of the first termination end 103 may help guide the folding of the flexible wiring 230 (through the end opening EO). In an embodiment, the flexible wiring 230 may surround the rounded portion R of the first termination end 103 or be folded around the rounded portion R of the first termination end 103, the rounded portion R having a suitable radius of curvature, and the flexible wiring 230 may be folded in a shape having a suitable radius of curvature and not undesirably folded due to external impact, so that the radius of curvature of the flexible wiring 230 may be stably supported and the flexible wiring 230 may not be damaged.

The sub circuit board 220 may be disposed on the board holder 100. In an embodiment, the sub circuit board 220 may be on an outer surface of the first main wall 101 of the board holder 100. As described in more detail below, the second end 222 of the sub circuit board 220 may be inserted into the first main wall 101 (e.g., between the first main wall 101 and the second main wall 102) through the snap tabs S, and a main portion 225 of the sub circuit board 220 (occupying a majority of the sub circuit board 220 other than the second end 222 of the sub circuit board 220) may be disposed on an outer surface of the first main wall 101. In an embodiment, the first end 221 of the sub circuit board 220 may be connected to the flexible wiring 230, and the first end 221 of the sub circuit board 220 may be included in the main portion 225 of the sub circuit board 220.

The snap tabs S may be on the first main wall 101 of the board holder 100 to help prevent the daughter circuit board 220 from lifting, unfolding, or moving away from the main circuit board 210 (or the first main wall 101 of the board holder 100). In an embodiment, the catching piece S may be on the first main wall 101 on which or facing the sub circuit board 220 is disposed. In an embodiment, the snap tab S may be configured to physically interfere with (e.g., hold or press against) a second end 222 of the sub-circuit board 220, the second end 222 extending away from a first end 221 of the sub-circuit board 220 connected to the flexible wiring 230. In an embodiment, the catching piece S may be configured to physically interfere with the second end 222 of the sub circuit board 220, the second end 222 corresponding to an opposite side of the flexible wiring 230, and the catching piece S may form a distant moment arm (distance moment arm) capable of effectively preventing the flexible wiring 230 from spreading. In an embodiment, the external input/output terminal T may be on the second end 222 of the sub circuit board 220, and the catching piece S of the board holder 100 may physically interfere with the second end 222 of the sub circuit board 220 on which the external input/output terminal T is formed.

In an embodiment, the intermediate opening MO into which the second end 222 of the sub circuit board 220 may be inserted may be in the first main wall 101 of the board holder 100. In an embodiment, the snap tab S may be a middle opening wall defining one side of the middle opening MO. In an embodiment, the intermediate opening MO may be in the first main wall 101 of the board holder 100 on which the sub circuit board 220 is arranged, and the intermediate opening MO may be between two ends (e.g., opposite ends) of the board holder 100 in the first direction Z1, for example, between the first terminating end 103 and the second terminating end 104 of the board holder 100. In an embodiment, the main portion 225 of the sub circuit board 220 may be on or facing the outer surface of the first main wall 101, and the second end 222 of the sub circuit board 220 may be inserted into the first main wall 101 through the middle opening MO in the first main wall 101 and may be fitted between the main circuit board 210 and the catching piece S formed as the middle opening wall. In an embodiment, the second end 222 of the daughter circuit board 220 may be inserted between the middle opening wall (corresponding to the snap tab S) and the main circuit board 210, the second end 222 of the daughter circuit board 220 may be pressed toward the main circuit board 210 or held adjacent to the main circuit board 210, and the daughter circuit board 220 may not be unfolded, e.g., lifted or moved away from the main circuit board 210. In an embodiment, according to an embodiment, the middle opening wall physically interfering with the second end 222 of the sub circuit board 220 may correspond to the catching piece S.

In an embodiment, the intermediate opening wall (corresponding to the snap tab S) may have a stepped shape in a direction away from the second main wall 102 of the board holder 100 (e.g., may be spaced apart from the second main wall 102 by a distance greater than the distance by which the first main wall 101 is spaced apart from the second main wall 102). In an embodiment, the intermediate opening wall (corresponding to the snap tab S) may be a portion of the first main wall 101 of the board holder 100, and a portion of the first main wall 101 as the intermediate opening wall may have a stepped shape in a direction away from the second main wall 102 with respect to other portions of the first main wall 101 adjacent to the first and second terminating ends 103 and 104 of the board holder 100. In an embodiment, the middle opening wall (corresponding to the catching piece S) may have a stepped shape, an additional space may be secured or provided between the middle opening wall and the second main wall 102, and the second end 222 of the sub circuit board 220 may be fitted in the additional space.

In embodiments, the snap tabs S may correspond to suitable structures configured to physically interfere with the second end 222 of the daughter circuit board 220 to prevent the daughter circuit board 220 from lifting or otherwise unfolding from the main circuit board 210, e.g., the snap tabs S may correspond to a middle opening wall surrounding a middle opening MO into which the second end 222 of the daughter circuit board 220 may fit, or a hook structure into which the second end 222 of the daughter circuit board 220 may fit.

In an embodiment, a catching piece S may be on the board holder 100 to help prevent the sub circuit board 220 from being lifted from the main circuit board 210 or the board holder 100 or prevent the sub circuit board 220 from being spread in a direction away from the main circuit board 210 or the board holder 100, and a protruding rib P (for preventing the swing of the sub circuit board 220) may be on the board holder 100 together with the catching piece S. In an embodiment, the sub circuit boards 220 on the first main wall 101 of the board holder 100 may not be firmly fixed to the first main wall 101 of the board holder 100, but may, for example, swing on the first main wall 101 of the board holder 100 in a plane defined by the first direction Z1 and the second direction Z2. In an embodiment, the first end 221 of the sub circuit board 220 may be connected to the main circuit board 210, and the second end 222 of the sub circuit board 220 may physically interfere with the catch S, and the sub circuit board 220 may swing more in the second direction Z2 than in the first direction Z1. In an embodiment, the protrusion ribs P for preventing the sub circuit board 220 from swinging may be at lateral end positions on the first main wall 101 in the second direction Z2. In an embodiment, the protrusion rib P may protrude from the outer surface of the first main wall 101, and may physically interfere with the sub circuit board 220 on the outer surface of the first main wall 101 or hold the sub circuit board 220 on the outer surface of the first main wall 101. The protruding ribs P may be on the first main wall 101 (on or adjacent to which the sub circuit board 220 may be disposed) and may physically interfere with the sub circuit board 220 to help reduce or prevent wobbling of the sub circuit board 220 on the first main wall 101.

The protruding rib P may be between opposite ends of the board holder 100 in the first direction Z1, for example, between the first and second terminating ends 103 and 104. In an embodiment, the protruding rib P may be at a position adjacent to the second end 222 of the sub circuit board 220. In an embodiment, the intermediate opening MO may be between the first and second terminating ends 103, 104 of the board holder 100, the snap tabs S may be on a wall defining the intermediate opening MO, and the protruding rib P may be on another wall defining the intermediate opening MO. Throughout the present specification, the wall defining the intermediate opening MO may refer to a portion of the first main wall 101 adjacent to the intermediate opening MO.

In an embodiment, the protruding ribs P may physically interfere with the sub circuit board 220 and may be fitted (inserted) into the recesses 228 in the sub circuit board 220. In an embodiment, the recess 228 may be at a location adjacent or near the second end 222 of the sub-circuit board 220, and may be at one lateral end (e.g., a top or top side) of the sub-circuit board 220 in the second direction Z2. In an embodiment, the recess 228 may be open in the edge of the sub circuit board 220 and in the outward direction, and may have an open shape, e.g., a slot, instead of a closed shape such as a hole.

Referring to fig. 1, an insulating tape 20 may be attached to an edge of the battery cell C, and an insulating adhesive tape 30 may be between the terrace portion 11 of the battery cell C and the board holder 100 for coupling between the terrace portion 11 and the board holder 100. In an embodiment, the insulating member 80 may be attached to the board holder 100 (in which the main circuit board 210, the sub circuit board 220, and the flexible wiring 230 are supported) so that the main circuit board 210, the sub circuit board 220, and the flexible wiring 230 may be insulated and protected from surrounding (e.g., external) environmental factors. Referring to fig. 1, a label sheet 51 may be attached to the battery cell C to insulate and protect the battery cell C, and provide a display area for displaying product information, such as a model name or a manufacturer of the battery cell C.

Referring to fig. 2, test points TP1 and TP2 for the main circuit board 210 or the sub circuit board 220 are shown, and the test points TP1 and TP2 may be openings through which portions of the main circuit board 210 or the sub circuit board 220 (e.g., terminals of the main circuit board 210 or the sub circuit board 220) may be exposed to check for performance abnormality of the main circuit board 210 or the sub circuit board 220, for example, performance abnormality of components mounted on the main circuit board 210 or the sub circuit board 220.

In an embodiment, an improved circuit board support structure of the battery pack may be provided such that the sub circuit board 220 folded onto the main circuit board 210 is not lifted, unfolded, or randomly (e.g., undesirably) moved away from the main circuit board 210.

According to one or more of the above embodiments, the support structure for the sub circuit board 220 may be included by forming the catching pieces S or the protruding ribs P on the board holder 100 (accommodating the main circuit board 210) to help reduce or prevent the lifting, unfolding, or random movement of the sub circuit board 220, so that the circuit board support structure of the battery pack may be improved without increasing the manufacturing cost of the battery pack.

One or more embodiments may provide a battery pack having an improved circuit board support structure for preventing a sub circuit board folded on a main circuit board from being lifted, unfolded, or randomly moved away from the main circuit board.

One or more embodiments may provide a battery pack having an improved circuit board support structure without increasing the manufacturing cost of the battery pack.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless specifically stated otherwise, as will be apparent to one of ordinary skill in the art at the time of filing the present application. It will, therefore, be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.