Battery pack

Abstract

A rechargeable battery pack is provided. The rechargeable battery pack includes a holder having an accommodation space therein, a plurality of unit battery cells in the accommodation space, a connection tab electrically connecting the plurality of unit battery cells at an upper portion of the holder, a bus bar including a connector electrically connected to the connection tab and extending to the upper portion of the holder, a BMS circuit electrically connected to the connector; and a support between the connector and the BMS circuit and supporting the BMS circuit on an upper surface of the holder.

Description

Technical Field

[0001] The present disclosure relates to a rechargeable battery pack. Background Art

[0002] Generally, rechargeable batteries that can be charged and discharged have been widely used as power sources for wireless mobile devices. In addition, rechargeable batteries have attracted considerable attention as power sources for electric vehicles (EVs) and hybrid electric vehicles (HEVs), which have been developed to address issues such as air pollution caused by existing gasoline and diesel vehicles using fossil fuels.

[0003] If such a battery is alternately charged and discharged, the battery is typically managed such that the charging and discharging of the battery is controlled to maintain proper operating conditions and performance.

[0004] To this end, a battery management system (BMS) is used to manage the status and performance of the battery. The BMS manages the battery by measuring the current, voltage, or temperature of the battery and recording it in a memory.

[0005] The BMS is electrically connected to the batteries in the rechargeable battery pack through bus bars and manages the status and performance of the batteries.

[0006] However, if the connection portion between the bus bar and the BMS cannot maintain a horizontal position, it is difficult to make a reliable electrical connection, which reduces durability. Summary of the Invention

[0007] Embodiments include a rechargeable battery pack including a holder having an accommodating space therein, a plurality of unit battery cells in the accommodating space, a connection tab electrically connecting the plurality of unit battery cells at an upper portion of the holder, a bus bar including a connector electrically connected to the connection tab and extending to an upper portion of the holder, a BMS circuit electrically connected to the connector, and a support member between the connector and the BMS circuit and supporting the BMS circuit on an upper surface of the holder.

[0008] The retainer may include: a first retainer including a plurality of accommodating spaces for accommodating portions of the unit battery cells and a first connection tab at a lower portion of the retainer; and a second retainer including a plurality of accommodating spaces for accommodating other portions of the plurality of unit battery cells and a second connection tab at an upper portion of the retainer.

[0009] The busbar may include: a busbar plate extending from a side surface of the second retainer in a first direction and fixed by a fastening member; a connecting protrusion protruding from an edge of the busbar plate, extending toward an upper portion of the second retainer and electrically connected to the first connecting tab; and a connector protruding from an edge of the busbar plate, extending toward an upper portion of the second retainer and electrically connected to the BMS circuit.

[0010] The support member may include a circular slider supporting a lower surface of the BMS circuit.

[0011] The round slider may have a rounded surface supported by the upper side of the connector on a first side surface thereof, and a flat surface supported by the lower surface of the BMS circuit on a second side surface facing or opposite to the first side surface.

[0012] A support protrusion supporting the connector may protrude from an upper surface of the holder.

[0013] A smooth support member supporting the connector may be located on an upper portion of the supporting protrusion.

[0014] The rounded support member may include: a rounded portion located on an upper portion of the support protrusion and may have a rounded surface on an upper portion thereof; and a pair of fixing members bent in a lateral direction of the connector on opposite sides of the rounded portion.

[0015] A pair of fixing members may be located inside the side surface of the rounded portion.

[0016] The support may further include a fixing portion seated on the connector of the bus bar, a portion of the fixing portion being fixed to the BMS circuit.

[0017] The fixing portion may include a support plate on a surface of the connector of the bus bar, and an insertion protrusion protruding from an edge of the support plate and inserted and fixed to the BMS circuit.

[0018] The fastening member may pass through the fastening hole coupled thereto in the circular slider, the first through hole through which the fastening member passes may be on the connector, and the second through hole through which the fastening member passes may be on the support plate.

[0019] A groove may be on an upper surface of the rounded support, and an end portion of the fastening member may be inserted into the groove.

[0020] The tapered surface may contact a rounded portion of the support protrusion at an edge of the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Features will become apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the accompanying drawings, in which: Figure 1is an exploded perspective view schematically showing main parts of a rechargeable battery pack according to one or more embodiments of the present disclosure; Figure 2 is a perspective view schematically showing a main portion of a support protrusion and a rounded support member of a connector protruding from an upper side of a holder to support a bus bar according to one or more embodiments of the present disclosure; Figure 3 is a perspective view schematically showing a main portion of a support member mounted on an upper side of a connector of a bus bar according to one or more embodiments of the present disclosure; Figure 4 is a schematic diagram showing an apparatus installed in accordance with one or more embodiments of the present disclosure. Figure 3 a side view of a support member on the upper side of a busbar connector; Figure 5 is a cross-sectional view schematically illustrating a main portion of a connector of a bus bar and a BMS circuit electrically connected through a support member according to one or more embodiments of the present disclosure; Figure 6 is a diagram schematically illustrating a main portion of an insertion protrusion of a support member inserted into and fixed to a BMS circuit according to one or more embodiments of the present disclosure; and Figure 7 is a cross-sectional view schematically illustrating a main portion of a supporter mounted on an upper side of a connector of a bus bar according to one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they 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 implementations to those skilled in the art to which the present disclosure pertains.

[0023] In the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. It will be understood that if a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present. Furthermore, it will be understood that if a layer is referred to as being "below" another layer, it can be directly below the other layer, or one or more intervening layers may be present. Furthermore, it will be understood that if 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 be present.

[0024] As those skilled in the art will appreciate, the described embodiments may be modified in various different ways, all without departing from the scope of the present disclosure.The drawings and description are to be regarded as illustrative rather than restrictive in nature, and like reference numerals refer to like elements throughout the specification.

[0025] Figure 1 is an exploded perspective view schematically illustrating a rechargeable battery pack according to one or more embodiments of the present disclosure.

[0026] like Figure 1 As shown in , a rechargeable battery pack 100 according to one or more embodiments of the present disclosure may include: a holder 10 having a plurality of accommodation spaces 11 a, 13 a therein; a plurality of unit battery cells 12 in the plurality of accommodation spaces 11 a, 13 a; a connection tab 20 electrically connecting the plurality of unit battery cells 12 at an upper portion of the holder 10; a bus bar 30 including a connector 35 electrically connected to the connection tab 20 and extending to an upper portion of the holder 10 (e.g., the second holder 13); a BMS circuit 60 also on the upper portion of the holder 10 and electrically connected to the connector 35; and a support member 50 compensating for a slope between a lower surface of the BMS circuit 60 and an upper surface of the connector 35 to support the holder 10 horizontally relative to the upper surface (e.g., Figure 1 x / y plane) BMS circuit 60.

[0027] The holder 10 may have a plurality of accommodation spaces 11 a , 13 a therein so that a plurality of unit battery cells 12 may be accommodated therein.

[0028] There are a plurality of accommodation spaces 11 a and 13 a inside the holder 10 , and the accommodation spaces 11 a and 13 a may be arranged in multiple rows and columns relative to the entire area of the holder 10 , so that multiple battery cells 12 can be inserted into the holder 10 in multiple rows and columns.

[0029] The holder 10 may include a first holder 11 and a second holder 13 accommodating a plurality of unit battery cells 12 .

[0030] The first holder 11 may have therein a plurality of first accommodation spaces 11 a in which portions of the plurality of unit battery cells 12 are accommodated.

[0031] The first holder 11 may have a plurality of rows and columns of first accommodation spaces 11 a so that a portion of the plurality of unit battery cells 12 may be accommodated therein.

[0032] The second holder 13 may be on an upper portion of the first holder 11 , and a plurality of second accommodation spaces 13 a for accommodating the plurality of unit battery cells 12 together with the first holder 11 may be in the second holder 13 .

[0033] In the second holder 13 , the second receiving spaces 13 a may be arranged in a plurality of rows and columns so that a portion of the plurality of unit battery cells 12 may be received therein.

[0034] The connection tabs 20 may be mounted on the first retainer 11 and the second retainer 13 .

[0035] The connection tabs 20 may include a plurality of first connection tabs 21 electrically connecting lower portions of the plurality of unit battery cells 12 at a lower portion of the holder 10 , and a plurality of second connection tabs 23 electrically connecting upper portions of the plurality of unit battery cells 12 at an upper portion of the holder 10 .

[0036] The plurality of first connection tabs 21 may include a first tab plate 21 a on a lower portion of the first holder 11 , and a plurality of first tab protrusions 21 b protruding from an edge of the first tab plate 21 a to be electrically connected to the plurality of unit battery cells 12 .

[0037] The first tab plates 21a may be a plurality of first tab plates spaced apart from each other and fixed to the lower portion of the first holder 11, and may be electrically connected to a portion of the plurality of unit battery cells 12 at the lower portion of the first holder 11. A plurality of first tab protrusions 21b may protrude from edges of the first tab plates 21a.

[0038] A plurality of first tab protrusions 21 b may protrude along an edge of the first tab plate 21 a and be electrically connected to the plurality of unit battery cells 12 .

[0039] The plurality of first tab protrusions 21b may protrude on opposite sides of the first tab plate 21a according to the arrangement position of the first tab plate 21a, or may protrude from any edge position.

[0040] The second connection tab 23 may be mounted on an upper portion of the second retainer 13 to electrically connect the plurality of unit battery cells 12 .

[0041] The second connection tab 23 may include a plurality of second tab plates 23 a on the upper portion of the second holder 13 , and a plurality of second tab protrusions 23 b protruding from edges of the second tab plates 23 a to be electrically connected to the plurality of unit battery cells 12 .

[0042] A plurality of second tab plates 23a may be spaced apart from each other and fixed to an upper portion of the second holder 13, and may be electrically connected to a portion of the plurality of unit battery cells 12 at a lower portion of the second holder 13. A plurality of second tab protrusions 23b may protrude from edges of the second tab plates 23a.

[0043] The second tab plates 23a may be a plurality of tab plates spaced apart from each other and fixed to the upper portion of the second holder 13, and may be electrically connected to a portion of the plurality of unit battery cells 12 on the upper portion of the second holder 13. A plurality of second tab protrusions 23b may protrude from edges of the second tab plates 23a.

[0044] A plurality of second tab protrusions 23 b may protrude along an edge of the second tab plate 23 a and be electrically connected to the unit battery cells 12 .

[0045] The plurality of second tab protrusions 23b may protrude on opposite sides of the second tab plate 23a according to the arrangement position of the second tab plate 23a, or may protrude at edge positions on either side.

[0046] The first and second connection tabs 21 and 23 described above may be mounted on the first and second retainers 11 and 13 , respectively, to electrically connect the plurality of unit battery cells 12 to one another.

[0047] A bus bar 30 including a connector 35 electrically connected to the connection tab 20 and extending to an upper portion of the holder 10 may be included.

[0048] The bus bars 30 may be mounted on the first and second retainers 11 and 13 , respectively, thereby electrically connecting the BMS circuit 60 and the plurality of cell connection tabs 12 .

[0049] For example, the busbar 30 may include a busbar plate 31 extending from a side surface of the holder in a first direction and fixed by a fastening member, and a connector 35 protruding from an edge of the busbar plate 31 , extending toward an upper portion of the holder 10 , and electrically connected to the BMS circuit 60 .

[0050] The busbar plate 31 may be arranged along a first direction (eg, Figure 1 The retainer 10 is extendedly mounted on a side surface of the retainer 10 including the first retainer 11 or the second retainer 13 (in the x-axis direction).

[0051] The connection protrusions 33 of the busbar plate 31 protruding from the edge of the side surface of the holder 10 extending in the first direction may be electrically connected to the connection tab 20 .

[0052] The connection protrusion 33 may extend in a curved manner from the edge of the busbar plate 31 to the position of the connection tab 20 , and may be electrically connected to the connection tab 20 by a fastening member 15 such as a bolt.

[0053] In order to stably fix the busbar plate 31 to the side surface of the holder 10 and stably electrically connect to the connection tab 20 , a plurality of connection protrusions 33 may protrude.

[0054] The connector 35 may be connected to the BMS circuit 60 and may protrude from the bus bar plate 31 .

[0055] One side of the connector 35 may be connected to an edge of the busbar plate 31 , and the other side of the connector 35 may extend upward above the holder 10 to be electrically connected to the BMS circuit 60 .

[0056] The connector 35 can be secured by means of a fastening member 15 (see e.g. Figure 3 ) is electrically connected to the BMS circuit 60 and is interposed between the BMS circuit 60 and the upper portion of the holder 10 .

[0057] The lower portion of the connector 35 may be supported on the support protrusions 42 on the upper side of the holder 10 .

[0058] Figure 2 is a perspective view schematically illustrating main parts of a support protrusion and a rounded support piece of a connector protruding from an upper side of a holder to support a bus bar according to one or more embodiments of the present disclosure.

[0059] like Figure 2 , the support protrusion 42 may be provided on the upper side of the second holder 13 as a columnar protrusion on the upper side of the second holder 13, so that the connector 35 can be supported while being spaced apart from the upper surface of the second holder 13. The support protrusion 42 is not necessarily limited to a cylindrical shape and may instead be a polygonal column shape or the like.

[0060] The rounded support member 40 may be inserted into the upper portion of the support protrusion 42 .

[0061] The rounded support member 40 supports the flat lower surface of the connector 35 of the bus bar 30 and can be inserted into the support protrusion 42 , thereby enabling stable support in response to the installation slope of the connector 35 .

[0062] For example, the rounded support member 40 may include a rounded portion 41 on an upper portion of the support protrusion 42 and having a rounded surface on the upper portion, and two opposite sides of the rounded portion 41 in the lateral direction of the connector 35 (eg, Figure 1 A pair of fixing members 43 are bent in the y-axis direction (in the y-axis direction) and inserted into the side surfaces of the support protrusion 42.

[0063] The rounded portion 41 may protrude from an upper portion of the support protrusion 42 , and a rounded surface may be on an upper surface.

[0064] The rounded portion 41 may have a rounded surface that supports the lower surface of the connector 35 of the bus bar 30, and the upper surface may have a rounded shape with a certain curvature, thereby allowing stable support corresponding to the installation slope of the connector 35. A groove 41a into which the end of the fastening member 15 is inserted may be in the rounded portion 41.

[0065] Each of the pair of fixing pieces 43 may be bent on opposite sides of the rounded portion 41 .

[0066] A pair of fixing members 43 can also be bent in the lateral direction of the support protrusion 42 on opposite sides of the smooth portion 41, and can be pressed and fixed while being inserted into the opposite sides of the support protrusion 42 during the process of fixing the smooth support member 40 to the upper part of the support protrusion 42.

[0067] A pair of fixing members 43 may also be inserted into the inside of the side surface of the support protrusion 42. That is, insertion grooves (not shown) into which the fixing members 43 may be inserted may be on opposite sides of the support protrusion 42.

[0068] Therefore, a pair of fixing pieces 43 may be installed with insertion grooves inserted into the inner sides of the side surfaces of the support protrusions 42 , which prevents the fixing pieces 43 from interfering with adjacent components and allows stable installation.

[0069] The connector 35 may be tilted to be inserted between the BMS circuit 60 and the holder 10. For stable connection between the connector 35 and the BMS circuit 60, a support 50 may be installed between the BMS circuit 60 and the holder 10. A first through hole 35a for fixing the fastening member 15 may be in the connector 35.

[0070] The support member 50 can be inserted between the connector 35 and the BMS circuit 60, so that if the connector 35 and the BMS circuit 60 have different installation inclinations, the BMS circuit 60 can be stably supported in an upper position of the holder 10 while allowing reliable electrical connection between the bus bar 30 and the BMS circuit 60.

[0071] Figure 3 is a perspective view schematically showing a main portion of a support member mounted on an upper side of a connector of a bus bar according to one or more embodiments of the present disclosure, Figure 4 is a schematic diagram showing an apparatus installed in accordance with one or more embodiments of the present disclosure. Figure 3 Side view of the support on the upper side of the busbar connector, Figure 5 A cross-sectional view schematically illustrating a connector of a bus bar and a main portion of a BMS circuit electrically connected through a support according to one or more embodiments of the present disclosure, Figure 6is a diagram schematically illustrating a main portion of an insertion protrusion inserted into and fixed to a support member of a BMS circuit according to one or more embodiments of the present disclosure.

[0072] refer to Figures 3 to 6 To describe the support member 50 in more detail, the support member 50 may include a fixing portion 51 positioned on the connector 35 of the bus bar 30 , a portion of which is fixed to the BMS circuit, and a round slider 53 positioned on the fixing portion 51 and supporting the lower surface of the BMS circuit 60 .

[0073] The fixing portion 51 may be at least partially fixedly installed in the BMS circuit 60 while being located on the upper surface of the connector 35 of the bus bar 30 .

[0074] The fixing portion 51 may include a support plate 51 a on a surface of the connector 35 of the bus bar 30 , and an insertion protrusion 51 b protruding from an edge of the support plate 51 a and inserted and fixed to the BMS circuit 60 .

[0075] The support plate 51a may include a flat surface on the lower surface and in surface contact with the upper surface of the connector 35. A second through-hole 51c may be provided in the support plate 51a for passing the fastening member 15 therethrough.

[0076] The support plate 51 a may have a substantially rectangular or square planar shape, and the insertion protrusion 51 b may protrude from the edge.

[0077] A plurality of insertion protrusions 51b may protrude from an edge of the support plate 51a and may be inserted into the BMS circuit 60. The insertion protrusions 51b may protrude in a pin shape at each of four corner positions of the square planar shape of the support plate 51a and may be inserted and fixed to the BMS circuit 60.

[0078] The circular slider 53 may be on an upper portion of the support plate 51 a .

[0079] Although the inclination of the connector 35 of the bus bar 30 changes, the round slider 53 can be in a horizontal state (for example, in Figure 3 The BMS circuit 60 is stably supported in the x / y plane.

[0080] For example, the round slider 53 may have a rounded surface 53 a on a first side surface supported on the surface of the support plate 51 a , and a second side surface opposite to the first side surface may be supported on the lower surface of the BMS circuit 60 .

[0081] In other words, a first side surface of the slider 53 may have a rounded surface 53 a in contact with the support plate 51 a , and a second side surface facing or opposite to the first side surface may have a flat surface 53 b in surface contact with the BMS circuit 60 .

[0082] The round slider 53 may be between the BMS circuit 60 and the support plate 51 a , but a portion where the rounded surface 53 a contacts the support plate 51 a may vary according to a slope of the mounted connector 35 , thereby stably supporting the BMS circuit 60 in a horizontal state.

[0083] A fastening hole 53 c through which the fastening member 15 may be coupled may be in the circular slider 53 .

[0084] Therefore, the fastening member 15 can be coupled to the fastening hole 53c of the round slider 53 so that a portion of the fastening member 15 passes through the first through-hole 35a of the connector 35 and the second through-hole 51c of the support plate 51a, thereby fixing the round slider 53 to the upper side of the connector 35. The end of the fastening member 15 can be inserted into the groove 41a in the rounded portion 41.

[0085] Therefore, the fastening member 15 may stably connect the connector 35 of the bus bar 30 between the holder 10 and the BMS circuit 60 by passing through the fastening hole 53c, the first through hole 35a, and the second through hole 51c, and stably support the BMS circuit 60 in a horizontal state.

[0086] As described above, the rechargeable battery pack 100 of the present embodiment can have the bus bar 30 in an inclined state electrically connecting the connection tab 20 mounted on the holder 10 and the BMS circuit 60 through the support 50, so that the BMS circuit 60 is stably supported in a horizontal state on the upper side of the holder 10. Therefore, the BMS circuit 60 and the bus bar 30 can be stably electrically connected through the support 50, thereby improving durability.

[0087] Figure 7 : is a cross-sectional view schematically showing a main portion of a support member 50 mounted on the upper side of a connector of a bus bar according to one or more embodiments of the present disclosure. Figures 1 to 6 The same reference numerals as those in the drawings represent the same or similar components having the same or similar functions. Detailed descriptions of the same reference numerals will be omitted hereinafter.

[0088] like Figure 7 As shown in FIG, according to one or more embodiments of the present disclosure, the tapered surface 35 b may be at an edge of the first through-hole 35 a at the connector 35 of the bus bar 30 .

[0089] If the connector 35 is seated on the rounded portion 41 at the upper portion of the support protrusion 42 , the tapered surface 35 b may increase the area in which the first through hole 35 a of the connector 35 contacts the rounded portion 41 .

[0090] Therefore, the connector 35 is seated on the rounded portion 41 with a larger contact area, and can be seated more stably.

[0091] The present disclosure provides a rechargeable battery pack that can stably support and electrically connect a BMS circuit, even when the connection between the busbar and the BMS circuit is non-horizontal. A busbar electrically connected to the BMS circuit in an inclined position can be stably supported at the upper portion of a retainer by a support member, thereby supporting the BMS circuit in a horizontal position at the top of the retainer. Thus, the BMS circuit and busbar can be stably electrically connected in a horizontal position via the support member, thereby improving durability.

[0092] While the disclosure has been described in connection with what are presently considered to be practical embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments, but on the contrary is intended to cover various modifications and equivalent arrangements included within the purview of the appended claims.

[0093] 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 cases, as will be apparent to one of ordinary skill in the art upon filing this application, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless specifically indicated otherwise. Accordingly, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the invention as set forth in the appended claims.

[0094] <Description of Reference Signs> 10: Retainer 11: First retainer 11a: First storage space 12: Cell battery 13: Second retainer 13a: Second storage space 20: Connecting lugs 21: First connecting lug 21a: First lug plate 21b: First lug protrusion 23: Second connecting lug 23a: Second lug plate 23b: Second lug protrusion 30: Busbar 31: Busbar plate 33: Connecting protrusion 35: Connector 35a: First through hole 35b: Conical surface 40: Smooth support 41: Smooth part 42: Support protrusion 43: Fixing parts 50: Support 51: Fixed part 51a: Support plate 51b: Insertion protrusion 51c: Second through hole 53: Circular slider 53a: Smooth surface 53b: Flat surface 60: BMS circuit.

Claims

1. A rechargeable battery pack comprising: a retainer having a receiving space therein; A plurality of unit battery cells are inserted into the accommodation space; connecting tabs to electrically connect the plurality of unit battery cells at an upper portion of the holder; a bus bar including a connector electrically connected to the connection tab and extending to the upper portion of the retainer; a BMS circuit electrically connected to the connector; as well as A support member is between the connector and the BMS circuit and supports the BMS circuit on the upper surface of the holder.

2. The rechargeable battery pack according to claim 1, wherein The retainer comprises: a first holder including a plurality of accommodation spaces accommodating portions of the plurality of unit battery cells and a first connection tab at a lower portion of the first holder; and A second holder includes a plurality of accommodation spaces accommodating other portions of the unit battery cells and a second connection tab at an upper portion of the second holder.

3. The rechargeable battery pack according to claim 2, wherein The bus bar comprises: a busbar plate extending from a side surface of the second holder in a first direction and fixed by a fastening member; a connecting protrusion protruding from an edge of the busbar plate, extending toward the upper portion of the second retainer, and electrically connected to the first connecting tab; and A connector protrudes from the edge of the busbar plate, extends toward the upper portion of the second holder, and is electrically connected to the BMS circuit.

4. The rechargeable battery pack according to claim 1, wherein The support member includes a circular slider supporting a lower surface of the BMS circuit.

5. The rechargeable battery pack according to claim 4, wherein The round slider has a rounded surface supported by an upper side of the connector on a first side surface of the round slider, and a flat surface supported by a lower surface of the BMS circuit on a second side surface facing the first side surface.

6. The rechargeable battery pack according to claim 4, wherein A support protrusion that supports the connector protrudes from the upper surface of the holder.

7. The rechargeable battery pack according to claim 6, wherein: A smooth supporting piece supporting the connector is located on the upper portion of the supporting protrusion.

8. The rechargeable battery pack according to claim 7, wherein The smooth support member comprises: a rounded portion located on an upper portion of the support protrusion and having a rounded surface at an upper portion of the rounded portion; and A pair of fixing pieces are bent in a transverse direction of the connector on opposite sides of the rounded portion.

9. The rechargeable battery pack according to claim 8, wherein The pair of fixing members are located inside the side surface of the rounded portion.

10. The rechargeable battery pack according to claim 8, wherein The support member further includes a fixing portion positioned on the connector of the bus bar, a portion of the fixing portion being fixed to the BMS circuit.

11. The rechargeable battery pack according to claim 10, wherein: The fixed part includes: a support plate on a surface of the connector of the bus bar; and An insertion protrusion protrudes from an edge of the support plate and is inserted into and fixed to the BMS circuit.

12. The rechargeable battery pack according to claim 11, wherein A fastening hole is in the circular slider, a fastening member is coupled through the fastening hole, a first through hole through which the fastening member passes is on the connector, and a second through hole through which the fastening member passes is on the support plate.

13. The rechargeable battery pack according to claim 12, wherein: A groove is provided on the upper surface of the round support, and an end portion of the fastening member is inserted into the groove.

14. The rechargeable battery pack according to claim 12, wherein: The tapered surface contacts the rounded portion of the support protrusion at an edge of the through hole.

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