BMS Assembly

Abstract

The present invention relates to a BMS assembly, which includes: a circuit board having first fastening holes for grounding; a first casing mold that houses the circuit board and includes a bushing portion formed inside a second fastening hole that is recessed from the outside; and a fastening unit that passes through the first and second fastening holes and applies pressure to an upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, wherein the bushing portion includes a vertical portion formed in a direction parallel to the second fastening hole and a horizontal portion formed at an end of the vertical portion and extending in a direction perpendicular to the direction in which the vertical portion is formed, and the fastening unit is electrically connected to a case that houses a plurality of batteries therein, thereby grounding the circuit board.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0130047 filed on October 11, 2022, and all the contents disclosed in the document of the Korean Patent Application are incorporated herein by reference in their entirety.

[0002] The present invention relates to a ground assembly of a circuit board, and more particularly, to a BMS assembly including a structure for grounding a BMS circuit board.

Background Art

[0003] A PCB (Printed Circuit Board) is an essential component used in almost all electronic equipment, and is a printed circuit board formed by wiring electrical and electronic components circuitously on an insulating board. The PCB has a structure in which conductors and insulators are laminated in a substrate shape, and a large number of electrical and electronic components (electronic components) such as semiconductors, capacitors, and resistors can be mounted. Electrical connection can be made between the mounted electrical and electronic components through the circuit of the electrical wiring printed on the PCB. The PCB can efficiently design electrical wiring, reduce the size of electronic equipment, and improve performance and productivity.

[0004] A large number of electrical and electronic components mounted on the PCB can transmit and receive electrical signals. However, when the amount of electrical signals transmitted and received increases or the signals have to be processed at high speed, a phenomenon occurs in which the signal processing (signal processing) speed slows down, which causes a deterioration in the performance of the PCB. In order to eliminate the decrease in signal processing speed, methods such as increasing the number of layers (layers) of the PCB to expand the accommodation capacity of the elements are used.

[0005] On the other hand, PCBs contain high-speed digital ICs and high-speed signal traces, and become increasingly complex due to the connection of power I / O ports, etc., and common-mode current can be generated on the PCB board due to high-speed switching currents and discontinuities in the signal return current path. The generated common-mode current can couple with power lines and signal lines and become a major cause of electromagnetic radiation. Therefore, in order to reduce the generated electromagnetic radiation, it is necessary to ground the PCB to reduce the inflow of noise from the electromagnetic radiation into the electrical signals transmitted or received by the electrical and electronic elements mounted on the PCB.

[0006] Conventional PCB grounding structures have a problem where the fastening unit, which connects the PCB to other components and electrically, cannot fully pressurize only the bushing unit that electrically connects the PCB and the fastening unit, but pressurizes the case as well. As a result, the bushing unit and the PCB do not make complete contact, and the fastening unit may even pressurize the case, causing damage to the case. This weakens the contact force between the bushing and the circuit board, preventing the circuit board from being grounded and causing the electrical circuit of the PCB board to not function properly.

[0007] Therefore, there is a need to develop technologies to solve the problems mentioned above. [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The present invention aims to solve the above-mentioned problems and provides a BMS assembly in which the bushing portion completely receives the pressing force of the fastening unit in the BMS assembly, preventing damage to the casing mold, and improving the contact force between the bushing portion and the circuit board. [Means for solving the problem]

[0009] As one embodiment of the present invention, the present invention relates to a Battery Management System (BMS) assembly, comprising: a circuit board having a first fastening hole for grounding; a first casing mold housing the circuit board and including a bushing portion formed inside a second fastening hole formed by curving in from the outside; and a fastening unit that penetrates the first and second fastening holes and pressurizes the upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, wherein the bushing portion includes a vertical portion formed in a direction parallel to the second fastening hole and a horizontal portion at the end of the vertical portion that extends in a direction perpendicular to the direction in which the vertical portion was formed, and the fastening unit provides a BMS assembly that grounds the circuit board by being electrically connected to a case housing a plurality of batteries inside.

[0010] Furthermore, the bushing portion may include an electrically conductive metal material.

[0011] Furthermore, the vertical portion may be formed around the inner lower end of the second fastening hole, and the horizontal portion may be formed at the upper end of the vertical portion.

[0012] Furthermore, the fastening unit contacts the upper surface of the horizontal portion and applies downward pressure, and the horizontal portion can be extended to a wider area than the contact area between the fastening unit and the upper surface of the horizontal portion.

[0013] Furthermore, at least a portion of the lower surface of the horizontal section can be exposed so as to face the circuit board.

[0014] Furthermore, the horizontal portion can form a step in the second fastening hole.

[0015] Furthermore, the fastening unit includes a bolt and a nut, the bolt passing through the first fastening hole and the second fastening hole, and the nut connecting with the bolt, which can pressurize the upper surface of the bushing portion.

[0016] Furthermore, a third fastening hole is formed in the lower part of the circuit board through which the fastening unit passes, and a second casing mold for housing the circuit board may be further included.

[0017] Furthermore, the assembly may further include a leg unit that supports the lower part of the second casing mold, has a fourth fastening hole through which the fastening unit passes, and is electrically connected to the fastening unit in contact with it.

[0018] Furthermore, the leg unit may include an electrically conductive metal material.

[0019] Furthermore, the leg unit may include a mounting portion on which the second casing mold is placed, and a plurality of legs that are bent downward from the mounting portion and whose ends are connected to a battery module case or battery pack case.

[0020] Furthermore, the present invention may include a connector that is positioned between the horizontal portion and the circuit board, with one end in contact with the lower surface of the horizontal portion and the other end in contact with the upper surface of the circuit board, thereby electrically connecting the bushing portion and the circuit board.

[0021] Furthermore, the connector may include an electrically conductive metal material.

[0022] The connector may also include a first unit having an opening at one end and containing an elastically deformable elastic unit inside, and a second unit that is slidable relative to the first unit through the opening and has one end coupled to the elastic unit.

[0023] Furthermore, the elastic unit may be a spring.

[0024] In another embodiment of the present invention, the present invention includes a battery module case housing a plurality of batteries, and a BMS (Battery Management system) assembly coupled to the battery module case, wherein the BMS assembly includes a first casing mold including a circuit board having a first fastening hole for grounding, a bushing portion formed inside a second fastening hole formed by curving in from the outside and housing the circuit board, and a fastening unit that penetrates the first and second fastening holes and presses the upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, wherein the bushing portion includes a vertical portion formed in a direction parallel to the second fastening hole, and a horizontal portion formed at the end of the vertical portion in a direction perpendicular to the direction in which the vertical portion was formed, wherein the fastening unit provides a battery module that grounds the circuit board by being electrically connected to the battery module case.

[0025] In yet another embodiment of the present invention, the present invention includes a battery pack case housing a plurality of battery modules each housing a plurality of secondary batteries, and a BMS (Battery Management system) assembly coupled to the battery pack case, wherein the BMS assembly includes a circuit board having a first fastening hole for grounding, a first casing mold housing the circuit board and including a bushing portion formed inside a second fastening hole formed by curving in from the outside, and a fastening unit that penetrates the first and second fastening holes and presses the upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, wherein the bushing portion includes a vertical portion formed in a direction parallel to the second fastening hole and a horizontal portion at the end of the vertical portion that extends in a direction perpendicular to the direction in which the vertical portion was formed, and the fastening unit provides a battery pack that grounds the circuit board by being electrically connected to the battery pack case. [Effects of the Invention]

[0026] In the present invention, one of the corner shapes of the circuit board is formed asymmetrically with respect to the other corner shapes. In the assembly process of assembling electronic components on the circuit board, it is possible to intuitively determine whether the arrangement direction of the circuit board is correct through the position of the corner shape of the asymmetric part, and it is possible to prevent the electronic components from being assembled in the wrong direction due to the arrangement error of the circuit board in the assembly process.

[0027] Further, in the present invention, in order to facilitate the assembly of electronic components on the circuit board, the circuit board can be fixed to the guide case to which the circuit board is coupled at one time, and since grounding of the circuit board is possible, the efficiency of the assembly process can be improved. Also, since a ground pattern is formed over a large area in the asymmetric part of the circuit board, the contact area with the guide unit increases and the grounding function can be improved.

Brief Description of the Drawings

[0028] [Figure 1] The perspective view shows the appearance of the BMS assembly of the present invention. [Figure 2] The cross-sectional view is taken by cutting the BMS assembly of FIG. 1 in the direction along the line A - A', removing the fastening unit, and showing the first, second, third, and fourth fastening holes. [Figure 3] The cross-sectional view shows the BMS assembly in FIG. 1 cut in the direction along the line A - A'. [Figure 4] The perspective view shows the bushing part of the present invention. [Figure 5] The cross-sectional view specifically shows part B of FIG. 3, with a connector added between the circuit board and the bushing part. [Figure 6] (a) and (b) show the connector of the present invention in perspective view and cross-sectional view, respectively.

Embodiments for Carrying Out the Invention

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those with ordinary skill in the art to which the present invention pertains can easily implement it. However, the present invention can be realized in a variety of different forms and is not limited or restricted by the following embodiments.

[0030] To clearly explain the present invention, detailed descriptions of relevant prior art that are irrelevant to the description or that could unnecessarily obscure the essence of the invention have been omitted. Where reference numerals are assigned to components in the drawings in this specification, the same or similar reference numerals are assigned to identical or similar components throughout the specification.

[0031] Furthermore, terms or words used in this specification and in the claims should not be construed to be limited to their ordinary or dictionary meanings, but rather should be interpreted as meanings and concepts consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors may appropriately define the concepts of terms in order to best describe their invention.

[0032] Referring to Figures 1 to 3, the BMS assembly 10 according to the present invention may include a circuit board 100, a first casing mold 200, a fastening 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.

[0033] A Battery Management System (BMS) is a system that is coupled to a battery pack or battery module and senses various elements of the battery housed inside the battery pack or battery module, such as current, voltage, and temperature, to detect the battery's charge level, when it's time to replace the battery, and any problems that have occurred in the battery, thereby maintaining the battery in an optimal state.

[0034] The circuit board 100 included in the BMS assembly 10 is not limited to this, but may be of various forms, such as a PCB (Printed Circuit Board), FPCB (Flexible Printed Circuit Board), RF-PCB (Rigid-Flexible Printed Circuit Board), or HDI (High Density Interconnection), and preferably a PCB circuit board.

[0035] A first fastening hole 110 may be formed on one side of the circuit board 100.

[0036] Referring to Figures 2 and 3, the first fastening hole 110 into which the fastening unit 300 is inserted allows the circuit board 100 to be fastened and fixed to the first casing mold 200, the second casing mold 500, and the leg unit 600, etc.

[0037] The first fastening hole 110 can be electrically connected to a grounding surface, grounding pad, grounding pattern, etc., formed on the circuit board 100 so that the circuit board 100 can be grounded. When the circuit board 100 is stably grounded, the reference potential of the numerous electronic elements and electrical circuit patterns mounted on the circuit board 100 can be set, inducing current to flow as intended by the circuit board designer, and reducing the influx of noise into the electrical signals transmitted or received by the electronic elements.

[0038] The first casing mold 200 has an internal space formed on its inside and is positioned on top of the circuit board 100 to accommodate the circuit board 100 and the electronic elements mounted on one surface of the circuit board 100.

[0039] A second fastening hole 210 may be formed on one side of the first casing mold 200. The second fastening hole 210 may be a hole formed by curving inward from the outside of the first casing mold 200.

[0040] A bushing portion 220 may be formed at the inner lower end of the second fastening hole 210.

[0041] Referring to Figures 3 and 4, the bushing portion 220 may be configured to contact the fastening unit 300 and receive and support the pressure applied by the fastening unit 300 when the fastening unit 300 applies pressure to fasten the first casing mold 200 and the circuit board 100, and to contact the circuit board 100. The bushing portion 220 that is in contact with the circuit board 100 can be electrically connected to the circuit board 100.

[0042] The bushing portion 220 may include a vertical portion 221 and a horizontal portion 222.

[0043] The bushing portion 220 may be formed with an electrically conductive material so as to be able to electrically connect the fastening unit 300 and the circuit board 100. Furthermore, the bushing portion 220 may be formed with a metal material that has even greater mechanical strength than the plastic, polymer resin, or other material used for the second fastening hole 210, so as to be able to withstand the pressure applied by the fastening unit 300.

[0044] The vertical portion 221 is formed along the inner surface of the lower inner end of the second fastening hole 210 and can be formed in a direction parallel to a virtual vertical central axis that penetrates the second fastening hole 210.

[0045] The lower end of the vertical portion 221 is in contact with the circuit board 100, and a horizontal portion 222 can be formed at the upper end.

[0046] The inner surface of the vertical portion 221 does not need to be in contact with the bolt 310 of the fastening unit 300 inserted into the second fastening hole 210, as it is separated from the outer surface of the bolt 310 by a predetermined distance. Therefore, the diameter of the inner surface of the vertical portion 221 can be larger than the diameter of the bolt 310. This prevents contact between the inner surface of the vertical portion 221 and the outer surface of the bolt 310, allowing current to flow in the order of circuit board 100, vertical portion 221, horizontal portion 222, nut 320, bolt 310, leg unit 600, and battery module case 700, forming a single circuit for grounding and reducing noise intrusion. However, if the inner surface of the vertical portion 221 and the outer surface of the bolt 310 are in contact, current may flow in the order of the vertical portion 221 of the circuit board 100, bolt 310, leg unit 600, and battery module case 700, creating a further circuit for grounding and potentially causing noise problems.

[0047] The horizontal portion 222 may be formed so as to extend at the upper end of the vertical portion 221 in a direction perpendicular to a virtual vertical central axis that penetrates the second fastening hole 210 in the direction in which the vertical portion 221 was formed. The horizontal portion 222 can create a step in the second fastening hole 210, and the size of the hole can be expanded at the upper end of the second fastening hole 210 compared to the lower end of the second fastening hole 210.

[0048] Furthermore, since the material of the horizontal section 222 is a metal material with even greater mechanical strength than the material of the second fastening hole 210, damage to the first casing mold 200 can be prevented even when it comes into contact with the fastening unit 300 and is fully subjected to the pressure of the fastening unit 300.

[0049] The figure formed around the end of the horizontal section 222 may be a figure similar to the cross-sectional figure of the vertical section 221.

[0050] The horizontal portion 222 may be bent outward from the upper end of the vertical portion 221 to form a radial shape.

[0051] The upper surface of the horizontal portion 222 may be the surface that directly receives the downward pressure applied when the nut 320 of the fastening unit 300 is tightened by contacting the lower surface of the nut 320 of the fastening unit 300. The width of the upper surface of the horizontal portion 222 may be formed to be even wider than the contact area between the upper surface of the horizontal portion 222 and the fastening unit 300. The lower surface of the nut 320 may be in contact only with the upper surface of the horizontal portion 222.

[0052] In the longitudinal section of the bushing portion 220, the length of the horizontal portion 222 may be the same as or similar to the length of the vertical portion 221. The thickness of the horizontal portion 222 may be greater than the thickness of the vertical portion 221 so as to better support the applied pressure of the nut 320.

[0053] At least a portion of the lower surface of the horizontal section 222 may be formed to be exposed so as to be directly facing the upper surface of the circuit board 100. A connector 400 is positioned between the exposed lower surface of the horizontal section 222 and the upper surface of the circuit board 100, allowing the horizontal section 222 and the circuit board 100 to be electrically connected to each other.

[0054] The outer surface of the vertical portion 221 may be surrounded by the second fastening hole 210.

[0055] The first casing mold 200 is formed by including a material such as a polymer resin or polymer plastic, and the bushing portion 220 formed in the second fastening hole 210 is formed by including a metal material. Therefore, it may be manufactured by an insert injection molding method so that multiple different materials, such as metal and plastic, can be integrated.

[0056] The fastening unit 300 may also be a unit for fastening and fixing the circuit board 100, the first casing mold 200, and the second casing mold 500 to each other.

[0057] The fastening unit 300 may include a bolt 310 and a nut 320, the nut 320 of which can be coupled to the bolt 310.

[0058] The bolt 310 includes a head portion and a body connected to the head portion. The body is formed in a cylindrical shape, with a spiral thread protruding along its outer surface. The nut 320 has a hole formed so that its upper and lower surfaces are in communication, and a screw groove can be formed on its inner surface to correspond to the thread formed on the outer surface of the bolt 310, allowing it to be connected to the bolt 310. When the nut 320 is connected to the body of the bolt 310 and rotates in one direction, it moves along the length of the bolt 310 in the direction in which the head portion is formed. When it rotates in the opposite direction, it moves along the length of the bolt 310 in the opposite direction to the direction in which the head portion is formed.

[0059] Referring to Figure 5, the BMS assembly 10 may further include a connector 400. The connector 400 may be configured to electrically connect the lower surface of the horizontal section 222 to the upper surface of the circuit board 100.

[0060] Since the lower end of the vertical portion 221 is in contact with the circuit board 100, the bushing portion 220 and the circuit board 100 can be electrically connected. The connector 400 is positioned between the lower surface of the horizontal portion 222, which is exposed facing the lower surface of the circuit board 100, and the upper surface of the circuit board 100, so that the bushing portion 220 and the circuit board 100 can be electrically connected to each other. One end of the connector 400 is in contact with the lower surface of the horizontal portion 222, and the other end is in contact with the upper surface of the circuit board 100.

[0061] Referring to Figure 6, the connector 400 may include a first unit 410, an elastic unit 420, and a second unit 430.

[0062] The connector 400 may be formed including an electrically conductive metal material so as to electrically connect the bushing portion 220 and the circuit board 100 to each other, thereby grounding the circuit board 100.

[0063] The shape of the first unit 410 is not limited to this, but may be, for example, a cylindrical column, a rectangular column, or the like.

[0064] The first unit 410 has an opening at one end, and an internal space that communicates with the opening can be formed inside.

[0065] An elastic unit 420, which is arranged along the longitudinal direction of the first unit 410, may be coupled to the internal space of the first unit 410.

[0066] The elastic unit 420 may be configured to undergo elastic deformation, where its shape deforms when subjected to an external force, and is restored to its original shape by a restoring force when the force is removed. The elastic unit is not limited to this, but may be, for example, a spring.

[0067] The second unit 430 can be inserted through the opening of the first unit 410 and coupled with the first unit 410. The second unit 430 is formed to have a cross-sectional shape and size corresponding to the shape and size of the opening of the first unit 410, and can be coupled to the first unit 410 and slide relative to the first unit 410 to adjust the length of the connector 400 in the longitudinal direction.

[0068] 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 first unit 410, it pushes against the elastic unit 420 of the second unit 430, compressing and deforming the elastic unit 420, and the elastic unit 420 can exert an elastic force in the opposite direction to the direction of movement of the second unit 430.

[0069] The other end of the second unit 430 can contact the lower surface of the horizontal section 222 or the upper surface of the circuit board 100.

[0070] The basic length in the longitudinal direction of the connector 400, formed when the second unit 430 does not compress and deform the elastic unit 420, can be formed to be longer than the vertical distance between the lower surface of the horizontal section 222 and the upper surface of the circuit board 100. In the space between the lower surface of the horizontal section 222 and the upper surface of the circuit board 100, the first unit 410 and the second unit 430 can be fixed in position by contacting the lower surface of the horizontal section 222 and the upper surface of the circuit board 100 due to the elastic force caused by the compressive deformation of the elastic unit 420.

[0071] When the nut 320 is rotated in one direction to further pressurize the bushing portion 220, the separation distance between the horizontal portion 222 and the circuit board 100 can be further reduced, and the connector 400 located between the horizontal portion 222 and the circuit board 100 can also be adjusted in response to the changing separation distance between the horizontal portion 222 and the circuit board 100.

[0072] The second casing mold 500 is positioned below the circuit board 100 and, together with the first casing mold 200, can house the circuit board 100 in its internal space.

[0073] The first casing mold 200 and the second casing mold 500 can be fastened together by the fastening unit 300, and the fastening of the first casing mold 200 and the second casing mold 500 can form an internal space, in which the circuit board 100 is placed, and the first casing mold 200 and the second casing mold 500 can protect the circuit board 100 placed inside.

[0074] Referring to Figures 2 and 3, a third fastening hole 510 may be formed on one side of the second casing mold 500.

[0075] The first fastening hole 110, the second fastening hole 210, and the third fastening hole 510 may be positioned such that a virtual vertical central axis passing through each fastening hole 110, 210, and 510 coincides, allowing the bolts 310 of the fastening unit 300 to be inserted.

[0076] The second casing mold 500 can be used to manufacture materials such as synthetic resins and plastics using injection molding.

[0077] A leg unit 600 may be positioned below the second casing mold 500 to support the second casing mold 500 and to be fastened to the second casing mold 500 via a fastening unit 300.

[0078] Referring to Figures 2 and 3, a fourth fastening hole 610 may be formed on one surface of the leg unit 600 so that the fastening unit 300 can be inserted and fastened to the second casing mold 500.

[0079] The fourth fastening hole 610 may be positioned so as to coincide with the virtual vertical central axis of the first fastening hole 110, the second fastening hole 210, and the third fastening hole 510, so that the bolt 310 of the fastening unit 300 can be inserted into it.

[0080] The bolt 310 passes through the fourth fastening hole 610 and, when coupled with the nut 320, the head of the bolt 310 can press against the lower surface of the leg unit 600.

[0081] The leg unit 600 may include a mounting section 620 and a leg section 630.

[0082] The mounting portion 620 is formed on the upper surface of the leg unit 600, and the second casing mold 500 can be mounted on it. When the second casing mold 500 is mounted on the mounting portion 620, the fourth fastening hole 610 and the third fastening hole 510 may be positioned so that their respective vertical central axes passing through the fastening holes 510 and 610 coincide, so that the fastening unit 300 can fasten the leg unit 600 and the second casing mold 500.

[0083] The leg portion 630 may be bent downwards from the end of the mounting portion 620, away from the second casing mold 500 placed on the mounting portion 620.

[0084] The legs 630 may be coupled so that their ends contact the battery module or battery module case 700. When the legs 630 are coupled to the battery module or battery pack case 700, the upper surface of the circuit board 100 is sequentially electrically connected to the bushing 220, the fastening unit 300, and the leg unit 600, and can finally be grounded to the battery module case 700.

[0085] The leg unit 600 may be formed including an electrically conductive metal material so that it can be fastened to the bolts 310 of the fastening unit 300 and electrically connected.

[0086] Battery module The battery module may include a battery module case 700 and a BMS assembly 10. The battery module case 700 can house multiple batteries in its internal space. The batteries may be provided in various forms, such as pouch-shaped, cylindrical, or rectangular. The battery module case 700 is not limited in form and may include electrically conductive metal materials. The leg unit 600 of the BMS assembly 10 can be coupled to any one side of the battery module case 700, and the circuit board 100 can be electrically connected sequentially to the vertical part 221, horizontal part 222, nut 320, bolt 310, leg unit 600 and battery module case 700, and stably grounded. The specific details of the BMS assembly 10 can be replaced with the above description.

[0087] Battery pack The battery pack may include a battery pack case (not shown) and a BMS assembly 10. The battery pack may house multiple battery modules in its internal space, and each battery module may house multiple batteries. The batteries may be provided in various forms, such as pouch-shaped, cylindrical, or rectangular. The battery pack case is not limited in form and may include electrically conductive metal materials. The leg unit 600 of the BMS assembly 10 can be coupled to any one side of the battery pack case, and the circuit board 100 can be electrically connected sequentially to the vertical part 221, horizontal part 222, nut 320, bolt 310, leg unit 600, and battery pack case, and stably grounded. The specific details of the BMS assembly 10 can be replaced with the above description.

[0088] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and various implementations of the technical concept of the present invention and the equivalent scope of the claims described below are possible by persons with ordinary skill in the art to which the present invention pertains. [Explanation of symbols]

[0089] 10: BMS Assembly 100: Circuit board 110: 1st fastening hole 200: First casing mold 210:Second fastening hole 220: Bushing section 221: Vertical section 222:Horizontal part 300: Fastening Unit 310: Bolt 320: Nut 400: Connector 410: Unit 1 420: Elastic Unit 430: Unit 2 500: Second casing mold 510: 3rd fastening hole 600: Leg Unit 610: 4th fastening hole 620: Mounting section 630: Legs 700: Battery Module Case

Claims

1. BMS assembly, A circuit board having a first fastening hole for grounding, A first casing mold that houses the circuit board and includes a bushing portion formed inside a second fastening hole formed by curving in from the outside, The device comprises a fastening unit that penetrates the first and second fastening holes and pressurizes the upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, The bushing portion is, A vertical portion formed in a direction parallel to the second fastening hole, The end of the vertical portion includes a horizontal portion that extends in a direction perpendicular to the direction in which the vertical portion was formed, The fastening unit is a BMS assembly that grounds the circuit board by being electrically connected to a case that houses multiple batteries inside.

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

3. The vertical portion is formed along the inner lower end of the second fastening hole, The BMS assembly according to claim 1, wherein the horizontal portion is formed at the upper end of the vertical portion.

4. The fastening unit contacts the upper surface of the horizontal portion and applies downward pressure. The BMS assembly according to claim 1, wherein the horizontal portion is formed to extend further than the area in contact between the fastening unit and the upper surface of the horizontal portion.

5. The BMS assembly according to claim 4, wherein at least a portion of the lower surface of the horizontal portion is exposed so as to face the circuit board.

6. The BMS assembly according to claim 5, wherein the horizontal portion forms a step in the second fastening hole.

7. The fastening unit includes bolts and nuts, The bolt penetrates the first fastening hole and the second fastening hole, The BMS assembly according to claim 1, wherein the nut is connected to the bolt and pressurizes the upper surface of the bushing portion.

8. The BMS assembly according to claim 1, further comprising a second casing mold for housing the circuit board, with a third fastening hole formed in the lower part of the circuit board through which the fastening unit passes.

9. The BMS assembly according to claim 8, further comprising a leg unit that supports the lower part of the second casing mold, has a fourth fastening hole formed through which the fastening unit passes, and is electrically connected in contact with the fastening unit.

10. The BMS assembly according to claim 9, wherein the leg unit includes an electrically conductive metal material.

11. The aforementioned leg unit is The mounting section on which the second casing mold is placed, The BMS assembly according to claim 9, comprising a plurality of legs that are bent downward from the mounting portion and whose ends are connected to a battery module case or battery pack case.

12. The BMS assembly according to claim 1, further comprising a connector disposed between the horizontal portion and the circuit board, with one end in contact with the lower surface of the horizontal portion and the other end in contact with the upper surface of the circuit board, electrically connecting the bushing portion and the circuit board.

13. The BMS assembly according to claim 12, wherein the connector comprises an electrically conductive metal material.

14. The aforementioned connector is A first unit having an opening formed at one end and containing an elastically deformable elastic unit inside, The BMS assembly according to claim 12, comprising a second unit which is slidable relative to the first unit through the opening and whose one end 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 case containing multiple batteries, The BMS assembly is coupled to the battery module case, The BMS assembly is A circuit board having a first fastening hole for grounding, A first casing mold that houses the circuit board and includes a bushing portion formed inside a second fastening hole formed by curving in from the outside, The device includes a fastening unit that penetrates the first and second fastening holes and pressurizes the upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, The bushing portion is, A vertical portion formed in a direction parallel to the second fastening hole, The end of the vertical portion includes a horizontal portion that extends in a direction perpendicular to the direction in which the vertical portion was formed, The fastening unit is a battery module that grounds the circuit board by being electrically connected to the battery module case.

17. A battery pack case containing multiple battery modules, each containing multiple rechargeable batteries, The BMS assembly is coupled to the battery pack case, The BMS assembly is A circuit board having a first fastening hole for grounding, A first casing mold that houses the circuit board and includes a bushing portion formed inside a second fastening hole formed by curving in from the outside, The device includes a fastening unit that penetrates the first and second fastening holes and pressurizes the upper surface of the bushing portion to bring the circuit board and the bushing portion into contact, The bushing portion is, A vertical portion formed in a direction parallel to the second fastening hole, The end of the vertical portion includes a horizontal portion that extends in a direction perpendicular to the direction in which the vertical portion was formed, The fastening unit is electrically connected to the battery pack case, thereby grounding the circuit board, in the battery pack.

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