BMS grounding assembly

Abstract

The present invention relates to a BMS assembly, comprising: a circuit board having a first coupling hole for grounding; a first casing mold that accommodates the circuit board and includes a bushing portion that is formed in a second coupling hole that is recessed from the outside; and a coupling unit that passes through the first coupling hole and the second coupling hole and presses a top surface of the bushing portion and causes the circuit board and the bushing portion to come into contact, in which the bushing portion includes: a vertical portion formed in a direction parallel to the second coupling hole; and a horizontal portion extending from an end portion of the vertical portion in a direction perpendicular to a forming direction of the vertical portion, in which the coupling unit grounds the circuit board by being electrically connected to a case in which a plurality of batteries are accommodated.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2022-0130047, filed on October 11, 2022, which is incorporated herein by reference in its entirety. Technical Field

[0003] The present invention relates to a circuit board grounding assembly, and in particular to a BMS grounding assembly comprising a structure for grounding a BMS circuit board. Background Art

[0004] A printed circuit board (PCB) is an essential part for almost every electronic device, and is a printed circuit board that is wired and arranged on an insulating board to electrically connect electrical / electronic devices. PCBs each have a structure in which conductors and insulators are stacked in a plate shape, and a plurality of electrical / electronic components such as semiconductors, capacitors, or resistors can be mounted thereon. The mounted electrical / electronic components can be electrically connected to each other through a power line loop printed on the PCB. In the PCB, power lines can be efficiently designed to reduce the size of electronic devices and improve their performance and productivity.

[0005] A plurality of electrical / electronic components mounted on a PCB can transmit or receive electrical signals. However, when the amount of electrical signals transmitted or received increases or high-speed processing of signals is required, a phenomenon of reduced signal processing speed occurs, which leads to a decrease in the performance of the PCB. In order to solve the problem of reduced signal processing speed, methods such as increasing the number of layers of the PCB are used to increase the component accommodation capacity.

[0006] PCB includes high-speed digital IC and high-speed signal traces, and gradually becomes complicated due to the connection of power supply, I / O ports, etc., and common mode current may be generated in the PCB substrate due to discontinuity of high-speed switching current or signal return current path, etc. The generated common mode current may be the main cause of electromagnetic radiation caused by coupling to power lines or signal lines. Therefore, in order to reduce the generated electromagnetic radiation, the PCB needs to be grounded to reduce the noise caused by electromagnetic radiation from being introduced into the electrical signal transmitted or received by the electrical / electronic components mounted on the PCB.

[0007] In the structure for grounding the PCB substrate according to the prior art, the connection unit that connects the PCB substrate and electrically connects it to other components presses the bushing unit (the bushing unit electrically connects the PCB to the connection unit) together with the housing, but does not completely press the bushing unit alone. Therefore, the structure according to the prior art has the following problems: the bushing unit and the PCB substrate are not completely in contact with each other, but the connection unit presses the housing to cause damage to the housing, and the contact force between the bushing unit and the circuit board is reduced, so that the circuit board is not grounded, and thus the circuit of the PCB substrate does not operate normally.

[0008] Therefore, technological development is needed to solve the above problems. Summary of the invention

[0009] Technical issues

[0010] An object of the present invention to solve the above problems is to provide a BMS assembly in which a pressing force of a coupling unit is fully applied to a bushing part so that a casing mold is not damaged and a contact force between the bushing part and a circuit board is improved.

[0011] Technical Solution

[0012] As one embodiment of the present invention, the present invention provides a battery management system (BMS), which includes: a circuit board, in which a first connecting hole for grounding is defined; a first shell mold, which accommodates the circuit board and includes a bushing portion, which is placed in a second connecting hole recessed from the outside; and a connecting unit, which passes through the first connecting hole and the second connecting hole, and allows the circuit board and the bushing portion to contact each other while squeezing the top surface of the bushing portion, wherein the bushing portion includes: a vertical portion, which is arranged in a direction parallel to the second connecting hole; and a horizontal portion, which extends from an end of the vertical portion in a direction perpendicular to the direction in which the vertical portion is arranged, wherein the connecting unit is electrically connected to a shell accommodating a plurality of batteries to ground the circuit board.

[0013] The bushing portion may include an electrically conductive metallic material.

[0014] The vertical portion may be provided along a circumference of an inner lower end of the second coupling hole, and the horizontal portion may be provided on an upper end of the vertical portion.

[0015] The coupling unit may contact a top surface of the horizontal portion to press the horizontal portion downward, and

[0016] The horizontal portion may extend such that a top surface thereof is wider than an area where the coupling unit contacts the top surface of the horizontal portion.

[0017] At least a portion of a bottom surface of the horizontal portion may be exposed to face the circuit board.

[0018] The vertical portion may provide a stepped portion in the second coupling hole.

[0019] The coupling unit may include a bolt and a nut, the bolt may pass through the first coupling hole and the second coupling hole, and the nut may be coupled to the bolt and press the top surface of the bushing part.

[0020] A third coupling hole through which the coupling unit passes may be defined in a lower portion of the circuit board, and the BMS assembly may further include a second casing mold accommodating the circuit board.

[0021] The BMS assembly may further include a leg unit supporting a lower portion of the second casing mold, a fourth coupling hole through which the coupling unit passes being defined in the lower portion of the second casing mold, and the leg unit contacts and is electrically connected to the coupling unit.

[0022] The leg unit may include a conductive metal material.

[0023] The leg unit may include: a seating portion in which the second casing mold is seated; and a plurality of leg portions, each of which is bent downward from the seating portion and has an end portion coupled to the battery module case or the battery pack case.

[0024] The BMS assembly may further include a connector disposed between the horizontal portion and the circuit board and having one end contacting a bottom surface of the horizontal portion and another end contacting a top surface of the circuit board and electrically connecting the bushing portion to the circuit board.

[0025] The connector may include a conductive metal material.

[0026] The connector may include: a first unit having one end defined with an opening portion and an elastically deformable elastic unit disposed in the first unit; and a second unit capable of slidably moving relative to the first unit through the opening portion and having one end connected to the elastic unit.

[0027] The elastic unit may be a spring.

[0028] As another embodiment of the present invention, the present invention provides a battery module, comprising: a battery module housing, in which a plurality of batteries are accommodated; and a battery management system (BMS) assembly connected to the battery module housing, wherein the BMS assembly comprises: a circuit board, in which a first connecting hole for grounding is defined; a first shell mold, which accommodates the circuit board and comprises a bushing portion, which is placed in a second connecting hole recessed from the outside; and a connecting unit, which passes through the first connecting hole and the second connecting hole, and allows the circuit board and the bushing portion to contact each other while squeezing the top surface of the bushing portion, wherein the bushing portion comprises: a vertical portion, which is arranged in a direction parallel to the second connecting hole; and a horizontal portion, which extends from an end of the vertical portion in a direction perpendicular to the direction in which the vertical portion is arranged, wherein the connecting portion is electrically connected to the battery module housing to ground the circuit board.

[0029] As another embodiment of the present invention, the present invention provides a battery pack, comprising: a battery pack housing, a plurality of battery modules are provided to be accommodated in the battery pack housing, a plurality of secondary batteries are accommodated in the battery modules; and a battery management system (BMS) component coupled to the battery pack housing, wherein the BMS component comprises:

[0030] A circuit board, in which a first coupling hole for grounding is defined; a first shell mold, which accommodates the circuit board and includes a bushing portion, which is placed in a second coupling hole recessed from the outside; and a coupling unit, which passes through the first coupling hole and the second coupling hole and allows the circuit board and the bushing portion to contact each other while squeezing the top surface of the bushing portion, wherein the bushing portion includes: a vertical portion, which is arranged in a direction parallel to the second coupling hole; and a horizontal portion, which extends from an end of the vertical portion in a direction perpendicular to the direction in which the vertical portion is arranged, wherein the coupling portion is electrically connected to the battery module housing to ground the circuit board.

[0031] Beneficial effects

[0032] In the present invention, the shape of one edge of the circuit board can be set to be asymmetrical with the shape of the other edge, so that in the assembly process of assembling electronic components on the circuit board, it can be intuitively determined whether the layout direction of the circuit board is correct based on the position of the edge shape of the asymmetrical part. Therefore, it is possible to prevent in advance the electronic components from being assembled in the wrong direction due to the circuit board layout error during the assembly process.

[0033] In addition, the present invention can fix the circuit board to the guide housing to which the circuit board is connected at one time, so as to easily assemble the electronic components and the circuit board, and can ground the circuit board at the same time to improve the efficiency of the assembly process. In addition, the asymmetric part of the circuit board can have a large-area grounding pattern, thereby increasing the contact area with the guide unit to improve the grounding function. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a perspective view showing the appearance of a BMS assembly according to the present invention.

[0035] Figure 2 The figure shows that the connection unit is removed from the BMS component. Figure 1 A cross-sectional view of the first, second, third and fourth connecting holes taken along direction AA'.

[0036] Figure 3 is shown along Figure 1 A cross-sectional view of the BMS assembly taken along direction AA'.

[0037] Figure 4 is a perspective view showing a bushing portion according to the present invention.

[0038] Figure 5 It is specifically shown in Figure 3 A cross-sectional view showing a state where a connector is added between the circuit board and the bushing portion in part B.

[0039] Figure 6 (a) a perspective view and (b) a cross-sectional view of a connector according to the present invention are shown. DETAILED DESCRIPTION

[0040] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention belongs can easily perform the present invention. However, the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein.

[0041] In order to clearly describe the present invention, parts that are irrelevant to the description or detailed description of related well-known technologies that may unnecessarily obscure the subject matter of the present invention will be excluded. Throughout the specification, the same reference numerals denote the same elements.

[0042] Furthermore, the terms or words used in the present specification and claims should not be restrictively interpreted as ordinary meanings or dictionary-based meanings, but should be interpreted as meanings and concepts consistent with the scope of the present invention, based on the principle that the inventor can appropriately define the concepts of the terms in order to best describe and explain his or her invention.

[0043] Reference Figures 1 to 3The BMS assembly 10 according to the present invention may include a circuit board 100, a first casing mold 200, a coupling unit 300, a second casing mold 500, and a leg unit 600. The BMS assembly 10 may include a structure for grounding the circuit board 100.

[0044] A battery management system (BMS) may be a system that is connected to a battery backplate or a battery module and senses various parameters, such as current, voltage, or temperature of batteries housed inside the battery backplate or the battery module to detect the charge level of the battery, time to replace the battery, problems occurring in the battery, etc., so that the battery can be managed and maintained in an optimal state.

[0045] The circuit board 100 included in the BMS assembly 10 may include various types of circuit boards, such as a printed circuit board (PCB), a flexible printed circuit board (FPCB), a rigid flexible printed circuit board (RF-PCB), and a high-density interconnect circuit board (HDI), and preferably, the circuit board 100 may be a PCB circuit board. However, the circuit board 100 is not limited thereto.

[0046] A first coupling hole 110 may be defined in one side of the circuit board 100 .

[0047] Reference Figure 2 and Figure 3 The coupling unit 300 may be inserted into the first coupling hole 110 so as to couple and fix the circuit board 100 to the first casing mold 200 , the second casing mold 500 , the leg unit 600 , and the like.

[0048] The first coupling hole 110 may be electrically connected to a ground plane, a ground pad, a ground pattern, etc. provided on the circuit board 100 to ground the circuit board 100. When the circuit board 100 is stably grounded, a reference potential and a circuit pattern of each of a plurality of electronic components mounted on the circuit board 100 may be set to induce current to flow in a manner intended by a designer of the circuit board, and the introduction of noise into an electrical signal transmitted or received by the electronic components may be reduced.

[0049] The first casing mold 200 may define an inner space therein and may be placed above the circuit board 100 to accommodate the circuit board 100 and electronic components mounted on one surface of the circuit board 100 .

[0050] The second coupling hole 210 may be defined in one side of the first casing mold 200. The second coupling hole 210 may be a hole recessed inward from the outside of the first casing mold 200.

[0051] The bushing portion 220 may be disposed on an inner lower end of the second coupling hole 210 .

[0052] Reference Figure 3 and Figure 4 The bushing portion 220 may be a component provided as follows: when the coupling unit 300 presses the bushing portion 220 to couple the first casing mold 200 to the circuit board 100, the bushing portion 220 contacts the coupling unit 300, and the pressing force of the coupling unit 300 is transmitted to the bushing portion 220, so that the bushing portion 220 contacts the circuit board 100 while supporting the circuit board 100. The bushing portion 220 contacting the circuit board 100 may be electrically connected to the circuit board 100.

[0053] The bushing portion 220 may include a vertical portion 221 and a horizontal portion 222 .

[0054] The bushing portion may include a conductive material to electrically connect the coupling unit 300 and the circuit board 100 to each other. In addition, the bushing portion may include a metal material having greater mechanical strength than plastic, polymer resin, etc. (material of the second coupling hole 210) to withstand the extrusion force of the coupling unit 300.

[0055] The vertical portion 221 may be disposed along a circumference of an inner surface of an inner lower end of the second coupling hole 210 , and may be disposed in a direction parallel to a virtual vertical center axis passing through the second coupling hole 210 .

[0056] The vertical portion 221 may have a lower end contacting the circuit board 100 and an upper end on which the horizontal portion is disposed.

[0057] The inner side surface of the vertical portion 221 may be spaced apart from the outer side surface of the bolt 310 of the coupling unit 300 inserted into the second coupling hole 210 by a predetermined distance, and thus may not contact the bolt 310. Therefore, the diameter of the inner side surface of the vertical portion 221 may be greater than the diameter of the bolt 310. Therefore, the inner side surface of the vertical portion 221 and the outer side surface of the bolt 310 may not contact each other, so that the current is induced to flow through the circuit board 100, the vertical portion 221, the horizontal portion 222, the nut 320, the bolt 310, the leg unit 600, and the battery module housing 700 in sequence. Therefore, a single circuit for grounding may be provided, and the introduction of noise may be reduced. However, when the inner side surface of the vertical portion 221 and the outer side surface of the bolt 310 contact each other, the current may flow through the circuit board 100, the vertical portion 221, the bolt 310, the leg unit 600, and the battery module housing 700 in sequence. Therefore, another circuit for grounding may be provided, and a noise problem may be generated.

[0058] The horizontal portion 222 may be provided to extend from an end portion of an upper end of the vertical portion 221 in a direction perpendicular to a virtual vertical center axis that passes through the second coupling hole 210 in a direction in which the vertical portion 221 is provided. The horizontal portion 222 may provide a step portion in the second coupling hole 210, and a hole size may be expanded at an upper end of the second coupling hole 210 rather than at a lower end of the second coupling hole 210.

[0059] In addition, since the material of the horizontal portion 222 is a metal material having greater mechanical strength than that of the second coupling hole 210, even if the horizontal portion 222 contacts the coupling unit 300 and the pressing force of the coupling unit 300 is fully applied to the horizontal portion 222, the first shell mold 200 can be prevented from being damaged.

[0060] A pattern formed along the periphery of the end of the horizontal portion 222 may be a pattern similar to a horizontal cross-sectional view of the vertical portion 221 .

[0061] The horizontal portion 222 may be bent outward from an upper end of the vertical portion 221 to have a radial shape.

[0062] The top surface of the horizontal portion 222 may be a surface in contact with the bottom surface of the nut 320 of the coupling unit 300, so that the pressure applied downward while the nut 320 of the coupling unit 300 is tightened is directly applied to the surface. The top surface of the horizontal portion 222 may have an area set larger than a contact area where the top surface of the horizontal portion 222 contacts the coupling unit 300. The bottom surface of the nut 320 may contact only the top surface of the horizontal portion 222.

[0063] The horizontal portion 222 may have a length that is the same as or similar to that of the vertical portion 221 in a longitudinal section of the bushing portion 220. The horizontal portion 222 may have a thickness greater than that of the vertical portion 221 in order to well support the extrusion pressure of the nut 320.

[0064] At least a portion of the bottom surface of the horizontal portion 222 may be exposed to directly face the top surface of the circuit board 100. The connector 400 may be disposed between the exposed bottom surface of the horizontal portion 222 and the top surface of the circuit board 100 to electrically connect the horizontal portion 222 to the circuit board 100.

[0065] An outer side surface of the vertical portion 221 may be surrounded by the second coupling hole 210 .

[0066] Since the first shell mold 200 includes a material such as a polymer resin or a polymer plastic material, and the bushing portion 220 disposed in the second coupling hole 210 includes a metal material, the first shell mold 200 can be made by insert injection molding so that various types of different materials such as metal and plastic are integrated.

[0067] The coupling unit 300 may be a unit for coupling and fixing the circuit board 100 , the first casing mold 200 , and the second casing mold 500 to each other.

[0068] The coupling unit 300 may include a bolt 310 and a nut 320 , and the nut 320 may be coupled to the bolt 310 .

[0069] The bolt 310 may include a head and a body coupled to the head. The body may have a cylindrical shape so that the thread teeth protrude spirally along the periphery of the outer surface of the body. The nut 320 may have a hole, and an inner side surface, through which the top surface and the bottom surface of the nut 320 are connected to each other, and a thread groove is defined in the inner side surface to correspond to the thread teeth provided on the outer surface of the bolt 310, and the nut 320 is coupled to the bolt 310 through the thread groove. When the nut 320 is coupled to the body of the bolt 310 and rotated in one direction, the nut 320 may move in the longitudinal direction of the bolt 310 toward the direction in which the head is provided. When the nut 320 is rotated in the opposite direction, the nut 320 may move in the longitudinal direction of the bolt 310 toward the direction opposite to the direction in which the head is provided.

[0070] refer to Figure 5 The BMS assembly 10 may further include a connector 400. The connector 400 may be a component for electrically connecting the bottom surface of the horizontal portion 222 and the top surface of the circuit board 100 to each other.

[0071] Since the lower end of the vertical portion 221 contacts the circuit board 100, the bushing portion 220 and the circuit board 100 may be electrically connected to each other. The connector 400 may be disposed between the bottom surface of the horizontal portion 222 and the top surface of the circuit board 100, so that the bushing portion 220 and the circuit board 100 are electrically connected to each other, and the bottom surface of the horizontal portion 222 is exposed to face the bottom surface of the circuit board 100. Therefore, the connector 400 may be disposed so that one end thereof contacts the bottom surface of the horizontal portion 222, and the other end contacts the top surface of the circuit board 100.

[0072] Reference Figure 6 , the connector 400 may include a first unit 410 , an elastic unit 420 and a second unit 430 .

[0073] The connector 400 may include a conductive metal material to electrically connect the bushing portion 220 and the circuit board 100 to each other to ground the circuit board 100 .

[0074] The first unit 410 may have a shape such as a cylindrical column, a square column, but is not limited thereto.

[0075] The first unit 410 may have one end defining an opening portion, and may define an inner space communicating with the opening portion therein.

[0076] The elastic unit 420 disposed in the longitudinal direction of the first unit 410 may be coupled to the inner space of the first unit 410 .

[0077] The elastic unit 420 may be a component that can be elastically deformed, so that when an external force is applied to the component, the component is deformed, and when the force is removed, the component returns to its original shape due to a restoring force. The elastic unit may be, for example, a spring, but is not limited thereto.

[0078] The second unit 430 may be inserted into the opening portion of the first unit 410 so as to be coupled to the first unit 410. The second unit 430 may have a cross section whose shape and size respectively correspond to the shape and size of the opening portion of the first unit 410. The second unit 430 may be coupled to the first unit 410 and adjust the length of the connector 400 in the longitudinal direction while being slidably moved relative to the first unit 410.

[0079] Since one end of the second unit 430 is connected to the elastic unit 420 of the first unit 410, when the second unit 430 moves toward the direction close to the first unit 410, the second unit 430 can push the elastic unit 420 so that the elastic unit 420 is deformed to shrink, and the elastic unit 420 applies an elastic force in a direction opposite to the moving direction of the second unit 430.

[0080] The other end of the second unit 430 may contact the bottom surface of the horizontal portion 222 or the top surface of the circuit board 100 .

[0081] The basic length of the connector 400 in the longitudinal direction, which is provided when the second unit 430 does not push the elastic unit 420 to compress and deform the elastic unit 420, may be set to be greater than the vertical distance between the bottom surface of the horizontal portion 222 and the top surface of the circuit board 100. Due to the elastic force caused by the compression deformation of the elastic unit 420, the first unit 410 and the second unit 430 are in contact with the bottom surface of the horizontal portion 222 and the top surface of the circuit board 100, respectively, and the position of the connector 400 may be fixed in the space between the bottom surface of the horizontal portion 222 and the top surface of the circuit board 100.

[0082] When the nut 320 is rotated in one direction to more strongly compress the bushing portion 220, the spacing distance between the horizontal portion 222 and the circuit board 100 can be reduced, and the connector 400 placed between the horizontal portion 222 and the circuit board 100 can also be adjusted to correspond to the changed spacing distance between the horizontal portion 222 and the circuit board 100.

[0083] The second casing mold 500 may be placed under the circuit board 100 , and the second casing mold 500 together with the first casing mold 200 may accommodate the circuit board 100 in the inner space.

[0084] The first casing mold 200 and the second casing mold 500 may be coupled to each other by the coupling unit 300. Since the first casing mold 200 and the second casing mold 500 are coupled to each other, an internal space may be defined, and the circuit board 100 may be placed in the defined internal space, so that the first casing mold 200 and the second casing mold 500 protect the circuit board 100 placed therein.

[0085] refer to Figure 2 and Figure 3 , the third coupling hole 510 may be defined in one side of the second casing mold 500 .

[0086] The first, second and third coupling holes 110 , 210 and 510 may be disposed to match corresponding virtual vertical center axes passing through the coupling holes 110 , 210 and 510 , so that the bolt 310 of the coupling unit 300 is inserted into the coupling holes 110 , 210 and 510 .

[0087] The second casing mold 500 may be made of a material such as synthetic resin or plastic by insert injection molding.

[0088] A leg unit 600 supporting the second casing mold 500 and coupled to the second casing mold 500 through the coupling unit 300 may be disposed under the second casing mold 500 .

[0089] refer to Figure 2 and Figure 3 , a fourth coupling hole 610 may be defined in one surface of the leg unit 600 , so that the coupling unit 300 is inserted into the fourth coupling hole 610 to couple the leg unit 600 to the second shell mold 500 .

[0090] The fourth coupling hole 610 may be disposed to have a virtual vertical center axis matching corresponding virtual vertical center axes of the first coupling hole 110 , the second coupling hole 210 , and the third coupling hole 510 , so that the bolt 310 of the coupling unit 300 is inserted into the fourth coupling hole 610 .

[0091] The bolt 310 may pass through the fourth coupling hole 610 , and the bolt 310 coupled to the nut 320 may press the leg unit 600 by the head of the bolt 310 on the bottom surface of the leg unit 600 .

[0092] The leg unit 600 may include a seating portion 620 and a leg portion 630 .

[0093] The seating portion 620 may be placed on the top surface of the leg unit 600, and the second shell mold 500 may be seated on the seating portion 620. When the second shell mold 500 is seated on the seating portion 620, the fourth coupling hole 610 and the third coupling hole 510 may be positioned to match the corresponding virtual vertical center axes passing through the coupling holes 510 and 610, so that the coupling unit 300 couples the leg unit 600 to the second shell mold 500.

[0094] The leg portion 630 may be bent from an end of the seating portion 620 in a downward direction that is a direction away from the second casing mold 500 seated on the seating portion 620 .

[0095] The leg portion 630 may be coupled so that a distal end thereof contacts the battery pack or battery module housing 700. When the leg portion 630 is coupled to the battery pack or battery module housing 700, the top surface of the circuit board 100 may be electrically connected to the bushing portion 200, the coupling unit 300, and the leg unit 600 in sequence, and finally grounded to the battery module housing 700.

[0096] The leg unit 600 may include a conductive metal material so that the leg unit 600 is coupled and electrically connected to the bolt 310 of the coupling unit 300 .

[0097] Battery Module

[0098] The battery module may include a battery module housing 700 and a BMS assembly 10. A plurality of batteries may be housed in the internal space of the battery module housing 700. Each of the plurality of batteries may be provided in various types, such as a pouch type, a cylindrical type, or a prismatic type. The battery module housing 700 may have an unrestricted shape and include a conductive metal material. The leg unit 600 of the BMS assembly 10 may be coupled to one surface of the battery module housing 700, and the circuit board 100 may be electrically connected to the vertical portion 221, the horizontal portion 222, the nut 320, the bolt 310, the leg unit 600, and the battery module housing 700 in sequence so as to be stably grounded. The specific contents of the BMS assembly 10 may be replaced with the above contents.

[0099] Battery Pack

[0100] The battery pack may include a battery pack housing (not shown) and a BMS assembly 10. A plurality of battery modules may be accommodated in the internal space of the battery pack, and a plurality of batteries may be accommodated in each of the battery modules. Each of the plurality of batteries may be provided in various types, such as a pouch type, a cylindrical type, or a prismatic type. The battery pack housing may have an unrestricted shape and include a conductive metal material. The leg unit 600 of the BMS assembly 10 may be coupled to one surface of the battery pack housing, and the circuit board 100 may be electrically connected to the vertical portion 221, the horizontal portion 222, the nut 320, the bolt 310, the leg unit 600, and the battery pack housing in sequence so as to be stably grounded. The specific contents of the BMS assembly 10 may be replaced with the above contents.

[0101] Although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto and may be variously implemented by those skilled in the art to which the present invention pertains within the technical concept of the present invention and equivalents of the appended claims.

[0102] [Explanation of Reference Numerals]

[0103] 10: BMS components

[0104] 100: Circuit board

[0105] 110: First connection hole

[0106] 200: The first shell mold

[0107] 210: Second connection hole

[0108] 220: Bushing part

[0109] 221: Vertical part

[0110] 222: Horizontal section

[0111] 300: Connection unit

[0112] 310: Bolt

[0113] 320: Nut

[0114] 400: Connector

[0115] 410: Unit 1

[0116] 420: Spring

[0117] 430: Unit 2

[0118] 500: Second set of shell molds

[0119] 510: Third connection hole

[0120] 600: Outrigger unit

[0121] 610: Fourth connecting hole

[0122] 620: Resettlement section

[0123] 630: Leg part

[0124] 700: Battery module housing

Claims

1. A battery management system (BMS) component, comprising: A circuit board having a first connection hole for grounding defined therein; A first shell mold, the first shell mold is configured to accommodate the circuit board, the first shell mold comprises a bushing portion, and the bushing portion is placed in a second coupling hole recessed from the outside; as well as a coupling unit that passes through the first coupling hole and the second coupling hole and is configured to allow the circuit board and the bushing part to contact each other while pressing a top surface of the bushing part, Wherein, the bushing part comprises: a vertical portion, the vertical portion being arranged in a direction parallel to the second coupling hole; and a horizontal portion extending from an end of the vertical portion in a direction perpendicular to a direction in which the vertical portion is arranged, The coupling unit is electrically connected to a housing containing a plurality of batteries to ground the circuit board.

2. The BMS assembly according to claim 1, wherein: The bushing portion includes an electrically conductive metallic material.

3. The BMS assembly according to claim 1, wherein: The vertical portion is disposed along the periphery of the inner lower end of the second coupling hole, and The horizontal portion is disposed on an upper end of the vertical portion.

4. The BMS assembly according to claim 1, wherein: The coupling unit contacts the top surface of the horizontal portion to press the horizontal portion downward, and The horizontal portion extends such that a top surface thereof is wider than an area where the coupling unit contacts the top surface of the horizontal portion.

5. The BMS assembly according to claim 4, wherein: At least a portion of a bottom surface of the horizontal portion is exposed to face the circuit board.

6. The BMS assembly according to claim 5, wherein: The vertical portion provides a stepped portion in the second coupling hole.

7. The BMS assembly according to claim 1, wherein: The connecting unit includes a bolt and a nut, wherein the bolt passes through the first connection hole and the second connection hole, and The nut is coupled to the bolt, and presses a top surface of the bushing portion.

8. The BMS assembly according to claim 1, wherein: A third coupling hole is defined in a lower portion of the circuit board, the coupling unit passes through the third coupling hole, and The BMS assembly also includes a second housing mold configured to receive the circuit board.

9. The BMS assembly according to claim 8 further includes a leg unit, which is configured to support a lower portion of the second shell mold, a fourth coupling hole is defined in the lower portion of the second shell mold, the coupling unit passes through the fourth coupling hole, and the leg unit contacts the coupling unit and is electrically connected to the coupling unit.

10. The BMS assembly according to claim 9, wherein: The leg unit includes a conductive metal material.

11. The BMS assembly according to claim 9, wherein: The leg unit comprises: a placement portion in which the second shell mold is placed; and A plurality of leg portions, each of which is bent downward from the seating portion and has an end portion coupled to a battery module case or a battery pack case.

12. The BMS assembly according to claim 1, further comprising a connector, which is disposed between the horizontal portion and the circuit board and has one end in contact with a bottom surface of the horizontal portion and another end in contact with a top surface of the circuit board, and the connector is configured to electrically connect the bushing portion to the circuit board.

13. The BMS assembly according to claim 12, wherein: The connector includes a conductive metal material.

14. The BMS assembly according to claim 12, wherein: The connector comprises: a first unit having an opening portion defined in one end thereof and an elastic unit that is elastically deformable provided therein; and A second unit is slidably movable relative to the first unit through the opening portion, and one end of the second unit is coupled to the elastic unit.

15. The BMS assembly according to claim 14, wherein: The elastic unit is a spring.

16. A battery module, comprising: a battery module housing in which a plurality of batteries are accommodated; as well as a battery management system (BMS) assembly coupled to the battery module housing, The battery management system components include: A circuit board, wherein a first connection hole for grounding is defined in the circuit board; a first shell mold configured to accommodate the circuit board and comprising a bushing portion disposed in a second coupling hole recessed from the outside; and a coupling unit that passes through the first coupling hole and the second coupling hole and is configured to allow the circuit board and the bushing part to contact each other while pressing a top surface of the bushing part, Wherein, the bushing part comprises: a vertical portion, the vertical portion being arranged in a direction parallel to the second coupling hole; and a horizontal portion extending from an end of the vertical portion in a direction perpendicular to a direction in which the vertical portion is arranged, Wherein, the coupling portion is electrically connected to the battery module housing to ground the circuit board.

17. A battery pack comprising: a battery pack case in which a battery module provided in plural is accommodated in the battery pack case, and a plurality of secondary batteries are accommodated in the battery module; and a battery management system (BMS) assembly coupled to the battery pack housing, Wherein, the BMS components include: A circuit board, wherein a first connection hole for grounding is defined in the circuit board; a first shell mold configured to accommodate the circuit board and comprising a bushing portion disposed in a second coupling hole recessed from the outside; and a coupling unit that passes through the first coupling hole and the second coupling hole and is configured to allow the circuit board and the bushing part to contact each other while pressing a top surface of the bushing part, Wherein, the bushing part comprises: a vertical portion, the vertical portion being arranged in a direction parallel to the second coupling hole; and a horizontal portion extending from an end of the vertical portion in a direction perpendicular to a direction in which the vertical portion is disposed, Wherein, the coupling portion is electrically connected to the battery module housing to ground the circuit board.

Images