Battery pack

Abstract

According to exemplary embodiments, a battery pack is provided. The battery pack comprises: a pack housing including a base plate and sidewalls; a plurality of battery cell assemblies arranged on the base plate, each of the plurality of battery cell assemblies including a plurality of battery cells and an integrated circuit assembly that is coupled to the plurality of battery cells and includes a first antenna; a battery management system (BMS) including a second antenna; and a lead coupled to the sidewalls, wherein the lead includes a waveguide overlapping the first antenna of each of the plurality of battery cell assemblies and the second antenna, and includes a base portion and a raised portion spaced farther from the base plate than from the base portion, the waveguide being in the raised portion.

Description

battery pack

[0001] The present invention relates to a battery pack. This application claims the benefit of Korean Application No. 10-2024-0004518, filed January 11, 2024, and Korean Application No. 10-2024-0151876, filed October 31, 2024, which are incorporated herein by reference in their entirety.

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including handsets, laptops, and cordless vacuum cleaners. Recently, improved energy density and economies of scale have dramatically reduced the per-unit manufacturing cost of secondary batteries. Furthermore, as the range of battery electric vehicles (BEVs) has increased to match that of fuel-powered vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0003] The technological development trend in secondary batteries for mobility is improving energy density and safety. The energy density of a secondary battery is defined as the maximum electrical energy it can store divided by its mass. High energy density in secondary batteries is directly linked to driving efficiency and range in mobility, and therefore, various studies are being conducted to improve the energy density of secondary batteries.

[0004] The technical idea of ​​the present invention aims to solve a problem by providing a battery pack with increased energy density.

[0005] According to exemplary embodiments for solving the above-described problem, a battery pack is provided. The battery pack comprises: a pack housing including a base plate and side walls; a plurality of battery cell assemblies disposed on the base plate, each of the plurality of battery cell assemblies including a plurality of battery cells and an integrated circuit assembly coupled to the plurality of battery cells and including a first antenna; a battery management system (BMS) including a second antenna; and a lead coupled to the side walls, the lead including a waveguide overlapping the first antenna and the second antenna of each of the plurality of battery cell assemblies, the lead including a base portion and a rising portion spaced further from the base plate than the base portion, and the waveguide being in the rising portion.

[0006] The plurality of battery cells of each of the plurality of battery cell assemblies are arranged in a first direction parallel to the mounting surface of the base plate, and the waveguide extends in the first direction.

[0007] Each of the plurality of battery cells of the plurality of battery cell assemblies is arranged in a first direction parallel to the mounting surface of the base plate, and the waveguide includes a first portion extending in the first direction and a second portion extending in a second direction perpendicular to the first direction.

[0008] The first portion of the waveguide overlaps the first antenna of each of the plurality of battery cell assemblies, and the second portion of the waveguide overlaps the second antenna.

[0009] The battery pack further includes cross beams interposed between the plurality of battery cell assemblies; and a reinforcing member coupled to the cross beams, wherein the reinforcing member is spaced apart from the base plate with the cross beams interposed therebetween, and the waveguide overlaps the reinforcing member.

[0010] The battery pack further includes first reinforcing brackets coupled to the lead and spaced apart from each other with the waveguide therebetween.

[0011] The above battery pack further includes a second reinforcing bracket interposed between the first reinforcing brackets.

[0012] The plurality of battery cells of each of the plurality of battery cell assemblies are arranged in a first direction parallel to the mounting surface of the base plate, and each of the first reinforcing brackets extends in the first direction.

[0013] The above second reinforcing bracket extends in a second direction perpendicular to the first direction.

[0014] The above reinforcing bracket overlaps the above waveguide in the first direction.

[0015] The height of the above waveguide is in the range of 1 mm to 10 mm.

[0016] The width of the above waveguide is in the range of 100 mm to 200 mm.

[0017] The lead further comprises a shield partially surrounding the waveguide, and the lead further comprises a descending portion closer to the base plate than the base portion, and the shield is in the descending portion.

[0018] The planar shape of the above shield includes a C shape.

[0019] According to exemplary embodiments, a battery pack is provided. The battery pack comprises: a pack housing including a base plate and sidewalls; first through fourth battery cell assemblies disposed on the base plate, each of the first through fourth battery cell assemblies including a plurality of battery cells and an integrated circuit assembly coupled to the plurality of battery cells and including a first antenna; a BMS including a second antenna; and a lead coupled to the sidewalls, the lead including a waveguide including a first portion overlapping the first antenna of each of the first and second battery cell assemblies, a second portion overlapping the first antenna of each of the third and fourth battery cell assemblies, and a third portion overlapping the second antenna, the lead including a base portion and a rising portion spaced further from the base plate than the base portion, and the waveguide is in the rising portion.

[0020] The planar shape of the above waveguide includes a C shape.

[0021] Each of the first and second portions extends in a first direction parallel to the mounting surface of the base plate, and the third portion extends in a second direction parallel to the mounting surface and perpendicular to the first direction.

[0022] The third portion is interposed between the first and second portions.

[0023] A battery pack according to exemplary embodiments of the present invention can monitor the voltage and temperature of battery cell assemblies using wireless communication. This eliminates the need for wiring for signal transmission between the battery cell assemblies and a Battery Management System (BMS), thereby increasing the energy density of the battery pack.

[0024] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0025] FIG. 1 is a plan view illustrating a battery pack according to exemplary embodiments.

[0026] FIG. 2 is a plan view illustrating a battery pack according to exemplary embodiments.

[0027] Figure 3 is a cross-sectional view taken along the cutting line 1I-1I' of Figure 1.

[0028] FIG. 4 is a plan view illustrating a battery pack according to exemplary embodiments.

[0029] FIG. 5 is a plan view illustrating a battery pack according to exemplary embodiments.

[0030] FIG. 6 is a plan view illustrating a battery pack according to exemplary embodiments.

[0031] FIG. 7 is a plan view illustrating a battery pack according to exemplary embodiments.

[0032] Fig. 8 is a cross-sectional view taken along the cutting line 6I-6I' of Fig. 6.

[0033] FIG. 9 is a plan view illustrating a battery pack according to exemplary embodiments.

[0034] FIG. 10 is a plan view illustrating a battery pack according to exemplary embodiments.

[0035] Fig. 11 is a cross-sectional view taken along the cutting line 9I-9I' of Fig. 9.

[0036] FIG. 12 is a plan view showing a battery pack (104) according to exemplary embodiments.

[0037] Fig. 13 is a cross-sectional view taken along the cutting line 12I-12I' of Fig. 12.

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0039] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0040] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0041] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0042]

[0043] (Example 1)

[0044] FIG. 1 is a plan view showing a battery pack (100) according to exemplary embodiments.

[0045] FIG. 2 is a plan view illustrating a battery pack (100) according to exemplary embodiments. In FIG. 2, the lead (150) is omitted for a more complete understanding of the positional relationship between elements of the battery pack (100).

[0046] Figure 3 is a cross-sectional view taken along the cutting line 1I-1I' of Figure 1.

[0047] Referring to FIGS. 1 to 3, a battery pack (100) may include a pack housing (110), a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), a center beam (131), cross beams (133), reinforcing parts (135), a BMS (Battery Management System) (140), and a lead (150). The battery pack (100) is the final form of a battery system mounted on mobility, etc.

[0048] The pack housing (110) may include a base plate (110B) and side walls (110S). Here, two directions substantially parallel to the mounting surface (110M) of the base plate (110B) are defined as the X direction and the Y direction, and a direction substantially perpendicular to the mounting surface (110M) of the base plate (110B) is defined as the Z direction. The X direction, the Y direction, and the Z direction may be substantially perpendicular to each other.

[0049] The base plate (110B) may have a flat shape. The side walls (110S) may be substantially perpendicular to the base plate (110B). The side walls (110S) may be at edge portions of the base plate (110B).

[0050] Each of the base plate (110B) and the side walls (110S) may be provided by an extrusion process. The base plate (110B) may include a plurality of plates joined by friction stir welding.

[0051] A plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be arranged on a mounting surface (110M) of a base plate (110B) of a pack housing (110). In this example, the battery cell assemblies (120_1, 120_2) may be arranged in the X direction, the battery cell assemblies (120_3, 120_4) may be arranged in the X direction, the battery cell assemblies (120_1, 120_3) may be arranged in the Y direction, and the battery cell assemblies (120_2, 120_4) may be arranged in the Y direction. Accordingly, the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) form a matrix of 2 rows and 2 columns, but this is for the purpose of example and does not limit the technical idea of ​​the present invention in any sense.

[0052] The base plate (110B) can support a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4). The side walls (110S) can horizontally surround the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4).

[0053] Hereinafter, the technical idea of ​​the present invention will be described with reference to an embodiment in which the battery pack (100) is of a modular type and each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) does not include a module frame. However, this is a non-limiting example and does not limit the technical idea of ​​the present invention in any sense. A person skilled in the art will be able to easily arrive at a plurality of battery cell assemblies including a module frame and a module-type battery pack including the same based on the description herein.

[0054] Each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may include a plurality of battery cells (121), a first integrated circuit assembly (123), a second integrated circuit assembly (124), and FFC (Flexible Flat Cable) assemblies (127).

[0055] Each of the plurality of battery cells (121) may include an electrode assembly, positive leads connected to positive tabs of the electrode assembly, negative leads connected to negative tabs of the electrode assembly, an electrolyte, and a case. Each of the plurality of battery cells (121) may be any one of a cylindrical battery cell, a square battery cell, and a pouch-type battery cell. The electrode assembly of the cylindrical battery cell is housed in a cylindrical metal can. The electrode assembly of the square battery cell is housed in a square metal can. The electrode assembly of the pouch-type battery cell is housed in a pouch case including an aluminum laminate sheet.

[0056] The electrode assembly includes an anode, a cathode, and a separator interposed between the anode and the cathode. A jelly roll type electrode assembly is formed by winding an anode, a cathode, and a separator interposed between them. A stack type electrode assembly includes a plurality of sequentially stacked anodes, a plurality of cathodes, and a plurality of separators interposed between them.

[0057] According to exemplary embodiments, a plurality of battery cells (121) may constitute a plurality of banks. Each of the plurality of banks may include one or more parallel-connected battery cells (121). The plurality of banks may be connected in series with one another.

[0058] The negative leads of one or more battery cells (121) of each of the plurality of banks may be short-circuited with the positive leads of one or more battery cells (121) of a subsequent bank. The negative leads of one or more battery cells (121) of each of the plurality of banks may be welded with the positive leads of one or more battery cells (121) of a subsequent bank.

[0059] The positive leads of one or more battery cells (121) of each of the plurality of banks may be short-circuited with the negative leads of one or more battery cells (121) of a preceding bank. The positive leads of one or more battery cells (121) of each of the plurality of banks may be welded with the negative leads of one or more battery cells (121) of a preceding bank.

[0060] The number of battery cells (121) included in each of the plurality of banks and the number of banks connected in series with each other can be determined according to the voltage and current to be output through each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4).

[0061] According to exemplary embodiments, the cell stack may further include a plurality of separators. The plurality of separators may absorb swelling of the plurality of battery cells (121). According to exemplary embodiments, the plurality of separators may be thermal barriers. According to exemplary embodiments, each of the plurality of separators may have a high melting temperature and low thermal conductivity. According to exemplary embodiments, each of the plurality of separators may include a flame retardant material, such as a ceramic or coated glass material. According to exemplary embodiments, the plurality of separators may also be configured to release a fire retardant material and a fire extinguishing agent when a thermal runaway event occurs.

[0062] The first integrated circuit assembly (123) and the second integrated circuit assembly (124) may be spaced apart in the Y direction with a plurality of battery cells (121) therebetween. The first integrated circuit assembly (123) and the second integrated circuit assembly (124) may be electrically connected by FFC assemblies (127). Accordingly, sensing values ​​(e.g., voltage, current, and / or temperature) of the second integrated circuit assembly (124) may be transmitted to the first integrated circuit assembly (123) via the FFC assemblies (127).

[0063] According to exemplary embodiments, a first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be disposed at a center portion (e.g., a center portion in the Y direction) of the pack housing (110). The first integrated circuit assembly (123) of each of the plurality of battery assemblies (120_1, 120_2, 120_3, 120_4) may face a center beam (131).

[0064] According to exemplary embodiments, the second integrated circuit assembly (124) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be disposed at an edge portion (e.g., an edge portion in the Y direction) of the pack housing (110). The second integrated circuit assembly (124) of each of the plurality of battery assemblies (120_1, 120_2, 120_3, 120_4) may face the side wall (110S).

[0065] According to exemplary embodiments, the distance between the first integrated circuit assembly (123) and the center beam (131) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be less than the distance between the second integrated circuit assembly (124) and the center beam (131) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4).

[0066] The first integrated circuit assembly (123) may include an antenna (123A). The first integrated circuit assembly (123) may further include an insulating frame, an integrated circuit, bus bars, sensing plates, sensing bars, temperature sensors, wiring, and an insulating cover.

[0067] The insulating frame may include an insulating material such as plastic. The insulating frame may cover the front of a plurality of battery cells (121). The insulating frame may support integrated circuits, bus bars, sensing plates, sensing bars, temperature sensors, and wiring.

[0068] The bus bars may be short-circuited to the positive leads of one or more battery cells (121) of a first bank and to the negative leads of one or more battery cells (121) of a last bank. The bus bars may be welded to the positive leads of one or more battery cells (121) of the first bank and to the negative leads of one or more battery cells (121) of the last bank. The resulting voltages of the plurality of battery cells (121) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be output through the bus bars. The bus bars may be fixed to the insulating frame.

[0069] The integrated circuit may be mounted on an insulating frame. The positive and negative leads welded together may form nodes within the battery cell assembly (120). The integrated circuit may be configured to measure the voltages of the nodes.

[0070] The sensing bars may include a conductive material. The sensing bars may have a rod-like shape. The sensing bars may be short-circuited to the bus bars. The sensing bars may be coupled to the bus bars. The voltage of the bus bars may be measured through the sensing bars.

[0071] Each of the plurality of sensing plates may have a patch shape or a pad shape. The plurality of sensing plates may include a conductive material. The plurality of sensing plates may be short-circuited to corresponding positive and negative leads of the plurality of battery cells (121).

[0072] Each of the plurality of sensing plates can be connected to an integrated circuit. Through the plurality of sensing plates, the voltages of the plurality of nodes of each of the plurality of battery cells (120_1, 120_2, 120_3, 120_4) can be measured.

[0073] The temperature sensors can be configured to measure the temperature of a plurality of points of the battery cell assembly (120). The temperature sensors can be arranged in the X-direction, Y-direction, and Z-direction, thereby allowing the temperature distribution within the battery cell assembly (120) to be measured.

[0074] The antenna (123A) may be configured to communicate with the BMS (140). As a non-limiting example, the antenna (123A) may use a wireless LAN frequency, such as the 2.4 GHz band. The 2.4 GHz band has a bandwidth of approximately 80 MHz and may include 14 overlapping channels. Of the 14 overlapping channels, approximately 3 channels may be used simultaneously without signal interference.

[0075] Antenna (123A) may be mounted on an integrated circuit of the first integrated circuit assembly. The antenna (123A) may be configured to transmit a signal representing measurements of voltages and temperatures of the battery cell assembly (120).

[0076] The insulating cover may include an insulating material such as plastic. The insulating cover may be fitted to the insulating frame. The insulating cover may cover the integrated circuit, bus bars, sensing plates, sensing bars, and temperature sensors, thereby protecting the electrical components of the first integrated circuit assembly (123).

[0077] The second integrated circuit assembly (124) may include an insulating frame, an integrated circuit, sensing plates, temperature sensors, wiring, and an insulating cover. The second integrated circuit assembly (124) is generally similar to the first integrated circuit assembly (123), except that it does not include bus bars and sensing bars.

[0078] The center beam (131) may be surrounded by side walls (110S). Accordingly, the center beam may divide the space defined by the pack housing (110). The center beam (131) may be included in one of the plurality of plates of the base plate (110B), formed by an extrusion process together with one of the plurality of plates, or may be welded to one of the plurality of plates of the base plate (110B).

[0079] The center beam (131) can extend along the X direction. The center beam (131) can isolate the battery cell assemblies (120_1, 120_2) and the battery cell assemblies (120_3, 120_4) in the Y direction. The center beam (131) can be interposed between the battery cell assemblies (120_1, 120_2) and the battery cell assemblies (120_3, 120_4).

[0080] The cross beams (133) may extend along the Y direction. The cross beams (133) may isolate a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the X direction. The cross beams (133) may be interposed between the battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the X direction or between the battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the side walls (110S). The cross beams (133) may be interposed between the side walls (110S) and the center beam (131) in the Y direction.

[0081] A person skilled in the art will readily be able to arrive at a structure in which cross beams (133) are integrated into battery cell assemblies (120_1, 120_2, 120_3, 120_4) based on what is described herein.

[0082] A reinforcing member (135) can be connected to each of the cross beams (133) spaced apart in the Y direction. The impact resistance and vibration resistance of the cross beams (133) can be improved by the reinforcing member (135).

[0083] The BMS (140) may be placed in the electrical component mounting area (EMR) of the pack housing (110). The BMS (140) may be placed between the side wall (110S) where the exhaust devices are installed and the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4).

[0084] The BMS (140) may be configured to perform monitoring, balancing, and control of the battery pack. Monitoring of the battery pack (100) may include measuring voltage and current of specific nodes within a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and measuring temperature of set locations within the battery pack (100). The BMS (140) may include an antenna (140A) for receiving a signal transmitted from an antenna (123A) of a first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and representing voltage and temperature within the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4).

[0085] Balancing of the battery pack (100) is an operation to reduce the deviation between the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4). Control of the battery pack (100) includes preventing the occurrence of overcharge, overdischarge, and overcurrent. Through monitoring, balancing, and control, the battery pack (100) can operate under optimal conditions, and thus shortening of the lifespan of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) can be prevented.

[0086] The lead (150) can be coupled to the side walls (110S). The lead (150) can cover elements disposed inside the battery pack (100), such as battery cell assemblies (120_1, 120_2, 120_3, 120_4) and electrical components. The lead (150) can be fixed to the pack housing (110) by a mechanical coupling means, such as a bolt.

[0087] The lead (150) may include a waveguide (150WG). The waveguide (150WG) may extend in the X direction. The waveguide (150WG) may overlap with the first integrated circuit assembly (123) and the BMS (140) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the Z direction. The waveguide (150WG) may overlap with the antenna (123A) of the first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the antenna (140A) of the BMS (140) in the Z direction. The waveguide (150WG) can provide a channel for wireless communication between the antenna (123A) of the first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the antenna (140A) of the BMS (140).

[0088] The lead (150) may include a base portion (150B), a rising portion (150E), and a connecting portion (150C). The distance between the rising portion (150E) and the base plate (110B) may be different from the distance between the base portion (150B) and the base plate (110B). The distance between the rising portion (150E) and the base plate (110B) may be greater than the distance between the base portion (150B) and the base plate (110B). The connecting portion (150C) may connect the rising portion (150E) and the base portion (150B).

[0089] As a non-limiting example, the lead (150) may be provided by a casting process. Accordingly, the base portion (150B), the rising portion (150E), and the connecting portion (150C) of the lead (150) may be continuous elements of the lead (150) rather than elements joined by welding, bolting, or the like.

[0090] The connecting portion (150C) may be, but is not limited to, slanted in the Z direction. The connecting portion (150C) may also be parallel to the Z direction. The base portion (150B) and the rising portion (150E) may be substantially perpendicular to the Z direction.

[0091] The height (150WGH) of the waveguide (150WG) in the Z direction can be defined as the distance in the Z direction between the base portion (150B) and the rising portion (150E). The height (150WGH) of the waveguide (150WG) can be in a range of about 1 mm to about 10 mm. The height (150WGH) of the waveguide (150WG) can be about 2 mm or more. The height (150WGH) of the waveguide (150WG) can be about 3 mm or more. The height (150WGH) of the waveguide (150WG) can be about 4 mm or more. The height (150WGH) of the waveguide (150WG) can be about 9 mm or less. The height (150WGH) of the waveguide (150WG) can be about 8 mm or less. The height (150WGH) of the waveguide (150WG) may be about 7 mm or less. The height (150WGH) of the waveguide (150WG) may be about 6 mm or less.

[0092] The width (150WGW) of the waveguide (150WG) in the Y direction can be defined as the width of the rising portion (150E) in the Y direction. The width (150WGW) of the waveguide (150WG) can be in a range of about 100 mm to about 200 mm. The width (150WGW) of the waveguide (150WG) can be about 110 mm or more. The width (150WGW) of the waveguide (150WG) can be about 120 mm or more. The width (150WGW) of the waveguide (150WG) can be about 130 mm or more. The width (150WGW) of the waveguide (150WG) can be about 140 mm or more. The width (150WGW) of the waveguide (150WG) may be about 190 mm or less. The width (150WGW) of the waveguide (150WG) may be about 180 mm or less. The width (150WGW) of the waveguide (150WG) may be about 170 mm or less. The width (150WGW) of the waveguide (150WG) may be about 160 mm or less.

[0093] The internal space of the battery pack (100) is partitioned by cross beams (133). At this time, the cross beams (133) include a metal material such as aluminum, which may interfere with radio wave transmission within the battery pack (100). According to exemplary embodiments, by forming a waveguide (150WG) with a locally elevated structure in the lead (150), interference with the environment of the application in which the battery pack (100) is mounted (e.g., a vehicle body) can be prevented, while allowing wireless communication within the battery pack (100). Accordingly, wiring for connection between a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the BMS (140) can be omitted, and the energy density (more specifically, energy density per volume) of the battery pack (100) can be increased.

[0094] The battery pack (100) may further include exhaust devices. The exhaust devices may be coupled to any one of the side walls (110S). The side walls (110S) coupled with the exhaust devices may include exhaust paths connected to the exhaust devices. The exhaust devices may be configured to delay thermal propagation by releasing high-temperature gas inside the battery pack (100) to the outside when at least one of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) is in a thermal runway state.

[0095] Here, thermal runaway of multiple battery cell assemblies (120_1, 120_2, 120_3, 120_4) is a state in which temperature changes of multiple battery cell assemblies (120_1, 120_2, 120_3, 120_4) further accelerate the temperature changes, which is an uncontrollable positive feedback. Multiple battery cell assemblies (120_1, 120_2, 120_3, 120_4) in a state of thermal runaway exhibit a rapid temperature increase and emit a large amount of high-pressure gas and combustion debris.

[0096] The battery pack (100) may further include additional electrical components. The additional electrical components may be positioned on the pack housing (110). The additional electrical components may be positioned in the electrical component mounting area (EMR). The additional electrical components may be positioned between the side wall (110S) where the exhaust devices are installed and the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4).

[0097] Additional electrical componentsThe electrical components may further include a cooling device, a PRA (Power Relay Assembly), a safety plug, etc. The cooling device may include a cooling fan. The cooling fan may prevent overheating of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) by circulating air inside the battery pack (100). The PRA may be configured to supply or cut off power from the high-voltage battery to an external load (e.g., a motor of a vehicle). The PRA may protect the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the external load (e.g., a motor of a vehicle) by cutting off power supply to the external load (e.g., a motor of a vehicle) in a situation where an abnormal voltage such as a voltage surge occurs.

[0098]

[0099] (Example 2)

[0100] FIG. 4 is a plan view showing a battery pack (101) according to exemplary embodiments.

[0101] Fig. 5 is a plan view illustrating a battery pack (101) according to exemplary embodiments. In Fig. 5, the lead (151) is omitted for a more complete understanding of the positional relationship between elements of the battery pack (101).

[0102] Referring to FIGS. 4 and 5, a battery pack (101) may include a pack housing (110), a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), a center beam (131), cross beams (133), reinforcing parts (135), a BMS (140), and a lead (151). The battery pack (101) is the final form of a battery system mounted on mobility, etc.

[0103] The pack housing (110), the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), the center beam (131), the cross beams (133), and the reinforcing parts (135) are substantially the same as those described with reference to FIGS. 1 to 3, and thus, a duplicate description thereof will be omitted. The BMS (140) is the same as the BMS (140) of FIG. 2, but may be positioned at a location spaced apart from the center of the electrical component mounting area (EMR) (e.g., the center in the Y direction).

[0104] The lead (151) can be coupled to the side walls (110S). The lead (151) can cover elements arranged inside the battery pack (101), such as battery cell assemblies (120_1, 120_2, 120_3, 120_4) and electrical components. The lead (151) can be fixed to the pack housing (110) by a mechanical coupling means, such as a bolt.

[0105] The lead (151) may include a waveguide (151WG). The waveguide (151WG) may include a first portion (151WG1) extending in the X direction and a second portion (151WG2) extending in the Y direction. The first portion (151WG1) may be connected to the second portion (151WG2), but is not limited thereto. The first portion (151WG1) and the second portion (WG2) may be spaced apart from each other.

[0106] The waveguide (151WG) may overlap with the first integrated circuit assembly (123) and the BMS (140) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the Z direction. The waveguide (151WG) may overlap with the antenna (123A) of the first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the antenna (140A) of the BMS (140) in the Z direction.

[0107] A first portion (151WG1) of the waveguide (151WG) may overlap with a first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the Z direction. A second portion (151WG2) of the waveguide (151WG) may overlap with a BMS (140) in the Z direction. A first portion (151WG1) of the waveguide (151WG) may overlap with an antenna (123A) of a first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the Z direction. The second part (151WG2) of the waveguide (151WG) may overlap with the antenna (140A) of the BMS (140) in the Z direction. The waveguide (151WG) may provide a channel for wireless communication between the antenna (123A) of the first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the antenna (140A) of the BMS (140).

[0108] The first portion (151WG1) of the waveguide (151WG) may be substantially the same as the waveguide (150WG) of FIG. 1. The height of the second portion (151WG2) of the waveguide (151WG) may be substantially the same as the height of the first portion (151WG1) of the waveguide (151WG). The width of the second portion (151WG2) of the waveguide (151WG) may be substantially the same as the width of the first portion (151WG1) of the waveguide (151WG).

[0109]

[0110] (Example 3)

[0111] FIG. 6 is a plan view showing a battery pack (102) according to exemplary embodiments.

[0112] Fig. 7 is a plan view illustrating a battery pack (102) according to exemplary embodiments. In Fig. 7, the lead (152) is omitted for a more complete understanding of the positional relationship between elements of the battery pack (102).

[0113] Figure 8 is a cross-sectional view taken along the cutting line 6I-6I' of Figure 6.

[0114] Referring to FIGS. 6 to 8, a battery pack (102) may include a pack housing (110), a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), a center beam (131), cross beams (133), reinforcing parts (135), a BMS (140), a lead (152), and first and second reinforcing brackets (161, 162). The battery pack (102) is the final form of a battery system mounted on mobility, etc.

[0115] The pack housing (110), the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), the center beam (131), the cross beams (133), the reinforcing parts (135), and the BMS (140) are substantially the same as those described with reference to FIGS. 1 to 3, and therefore, a duplicate description thereof will be omitted.

[0116] The first reinforcing brackets (161) can extend in the X direction. The first reinforcing brackets (161) can overlap with a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) in the Z direction. In this example, each of the first reinforcing brackets (161) can overlap with a respective one of the battery cell assemblies (120_1, 120_2, 120_3, 120_4) arranged in the extension direction (i.e., the X direction) of each of the first reinforcing brackets (161) in the Z direction. In FIG. 7, each of the first reinforcing brackets (161) overlaps with two of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), but this is for illustrative purposes only and does not limit the technical idea of ​​the present invention in any sense. A person skilled in the art will readily be able to arrive at an embodiment in which each of the first reinforcing brackets (161) overlaps three or more battery cell assemblies based on the description herein.

[0117] According to exemplary embodiments, the first reinforcing brackets (161) may overlap with a plurality of cross beams (133) in the Z direction. According to exemplary embodiments, the first reinforcing brackets (161) may be coupled with a plurality of cross beams (133). In the example, each of the first reinforcing brackets (161) may be coupled with a cross beam (133) arranged in the extension direction (i.e., the X direction) of each of the first reinforcing brackets (161). In FIG. 7, each of the first reinforcing brackets (161) is coupled with three cross beams (133), but this is for illustration only and does not limit the technical idea of ​​the present invention in any sense. A person skilled in the art will easily arrive at an embodiment in which each of the first reinforcing brackets (161) is coupled with two or four or more cross beams based on the description herein.

[0118] The first reinforcing brackets (161) can be connected to each of the cross beams (133) arranged in the X direction by means of fasteners. The fasteners can be mechanical fastening means such as bolts, for example. In addition to the first reinforcing brackets (161), the fasteners can secure the lead (150) to the cross beams (133).

[0119] Each of the first reinforcing brackets (161) may include a base portion (161B), rising portions (161E), and connecting portions (161C). Each of the first reinforcing brackets (161) may include a Y-direction corrugated structure (CGS). The base portion (161B), rising portions (161E), and connecting portions (161C) may be arranged in the Y-direction. The Y-direction arrangement of the base portion (161B), rising portions (161E), and connecting portions (161C) may constitute a corrugated structure (CGS). That the first reinforcing brackets (161) include a Y-direction corrugated structure (CGS) means that the Z-direction position of each portion of the first reinforcing brackets (161) changes in a corrugated manner depending on the Y-direction position.

[0120] The rising members (161E) can be raised upward from the base member (161B). The distance between each of the rising members (161E) and the base plate (110B) can be different from the distance between the base member (161B) and the base plate (110B). The distance between each of the rising members (161E) and the base plate (110B) can be greater than the distance between the base member (161B) and the base plate (110B).

[0121] The connecting portions (161C) can connect the base portion (161B) and the rising portions (161E). Each of the base portion (161B) and the rising portions (161E) can be substantially parallel to the mounting surface (110M) of the base plate (110B). Each of the connecting portions (161C) can include either an inclined surface or a curved surface. Each of the connecting portions (161C) can, for example, be slanted to the mounting surface (110M) of the base plate (110B).

[0122] The second reinforcing bracket (162) may extend in the Y direction. The first reinforcing brackets (161) may be spaced apart in the Y direction, and the second reinforcing bracket (162) may be interposed between the first reinforcing brackets (161). The second reinforcing bracket (162) may include a corrugated structure in the X direction. The corrugated structure of the second reinforcing bracket (162) is similar to the corrugated structure (CGS) of the first reinforcing brackets (161).

[0123] The arrangement of the first and second reinforcing brackets (161, 162) may have an approximately C-shape. The first and second reinforcing brackets (161, 162) may partially surround the waveguide (162WG). The first and second reinforcing brackets (161, 162) may horizontally and partially surround the antennas (123A) and the antenna (140A). Each of the antennas (123A) may be interposed between the first reinforcing brackets (161). Each of the antennas (123A) may overlap the second reinforcing bracket (162) in the X direction.

[0124] The waveguide (162WG) may be interposed between the first reinforcing brackets (161). The first reinforcing brackets (161) may be spaced apart in the Y direction with the waveguide (152WG) interposed therebetween. The second reinforcing bracket (162) may overlap the waveguide (152WG) in the X direction.

[0125] The first and second reinforcing brackets (161, 162) can form a shield (SH) for signals between the antennas (123A) and the antenna (140A). The shield (SH) can prevent or alleviate attenuation of signals transmitted from the antennas (123A) to the antenna (140A). In addition, the shield (SH) can block or alleviate interference in communication between the antennas (123A, 140A) caused by wireless signals external to the battery pack (100).

[0126] The lead (152) may be coupled to the side walls (110S). The lead (152) may cover elements disposed inside the battery pack (102), such as battery cell assemblies (120_1, 120_2, 120_3, 120_4) and electrical components. The lead (152) may be fixed to the pack housing (110) by a mechanical coupling means, such as a bolt.

[0127] The lead (152) may include a waveguide (152WG). The waveguide (152WG) is substantially the same as the waveguide (150WG) of FIG. 1, and thus a duplicate description thereof will be omitted. The lead (152) may further include a shield coupling portion (152SM). The lead (152) may include an additional rising portion (152E) and a connecting portion (152C) for the shield coupling portion (152SM). The shield coupling portion (152SM) may overlap the first and second reinforcing brackets (161, 162) in the Z direction.

[0128] The distance between each of the rising portions (152E) and the base plate (110B) may be different from the distance between each of the base portions (152B) and the base plate (110B). The distance between each of the rising portions (152E) and the base plate (110B) may be greater than the distance between each of the base portions (152B) and the base plate (110B). The connecting portions (152C) may connect the base portions (152B) and the rising portions (152E).

[0129] The base portion (161B) may overlap with the base portion (152B) in the Z direction. The base portion (161B) may be in contact with the base portion (152B). The base portion (161B) may be welded to the base portion (152B). Accordingly, first weld portions (WP1) may be provided on the base portion (161B) and the base portion (152B). The first weld portions (WP1) may be formed, for example, by spot welding.

[0130] The rising portions (161E) may overlap with the rising portion (152E) in the Z direction. According to exemplary embodiments, a plurality (e.g., two or more) of the rising portions (161E) may overlap with the rising portion (152E) in the Z direction. The rising portions (161E) may be in contact with the rising portion (152E). The rising portions (161E) may be welded to the rising portion (152E). Accordingly, second weld portions (WP2) may be provided on the rising portions (161E) and the rising portion (152E). The second weld portions (WP2) may be formed, for example, by spot welding.

[0131] According to exemplary embodiments, the first and second reinforcing brackets (161, 162) may be coupled to the cross beams (133) and may be coupled to the lead (152). The first reinforcing brackets (161) may reinforce the rigidity of the lead (152), and structures may be provided to withstand uniform surface pressure on the upper and lower portions of the battery cell assembly (120) when the plurality of battery cells (121) are swollen.

[0132]

[0133]

[0134] (Example 4)

[0135] FIG. 9 is a plan view showing a battery pack (103) according to exemplary embodiments.

[0136] Fig. 10 is a plan view illustrating a battery pack (103) according to exemplary embodiments. In Fig. 10, the lead (153) is omitted for a more complete understanding of the positional relationship between elements of the battery pack (103).

[0137] Fig. 11 is a cross-sectional view taken along the cutting line 9I-9I' of Fig. 9.

[0138] Referring to FIGS. 9 to 11, a battery pack (103) may include a pack housing (110), a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4), a center beam (131), cross beams (133), reinforcing parts (135), a BMS (140), and a lead (153). The battery pack (103) is the final form of a battery system mounted on mobility, etc.

[0139] The pack housing (110), center beam (131), cross beams (133), reinforcing parts (135), and BMS (140) are substantially the same as those described with reference to FIGS. 1 to 3, so a duplicate description thereof is omitted.

[0140] The plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be substantially the same as described with reference to FIGS. 1 to 3, but may be arranged differently from FIGS. 1 to 3. The first integrated circuit assembly (123) of each of the plurality of battery assemblies (120_1, 120_2, 120_3, 120_4) may be arranged at an edge portion (e.g., an edge portion in the Y direction) of the pack housing (110). The first integrated circuit assembly (123) of each of the plurality of battery assemblies (120_1, 120_2, 120_3, 120_4) may face the side wall (110S).

[0141] According to exemplary embodiments, the second integrated circuit assembly (124) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) may be disposed at a center portion (e.g., a center portion in the Y direction) of the pack housing (110). The second integrated circuit assembly (124) of each of the plurality of battery assemblies (120_1, 120_2, 120_3, 120_4) may face the center beam (131).

[0142] The lead (153) can be coupled to the side walls (110S). The lead (153) can cover elements disposed inside the battery pack (100), such as battery cell assemblies (120_1, 120_2, 120_3, 120_4) and electrical components. The lead (153) can be fixed to the pack housing (110) by a mechanical coupling means, such as a bolt.

[0143] The lead (153) may include a waveguide (153WG). The planar shape of the waveguide (153WG) may include a C-shape. The waveguide (153WG) may include first and second portions (153WG1, 153WG2) extending in the X direction and a third portion (153WG3) extending in the Y direction. The third portion (153WG3) may be between the first and second portions (153WG1, 153WG2). The third portion (153WG3) may be connected to each of the first and second portions (153WG1, 153WG2). The third portion (153WG3) may be connected to an end of each of the first and second portions (153WG1, 153WG2) in the X direction.

[0144] A first portion (153WG1) of the waveguide (153WG) may overlap with a first integrated circuit assembly (123) of each of the battery cell assemblies (120_1, 120_2). A second portion (153WG2) of the waveguide (153WG) may overlap with a first integrated circuit assembly (123) of each of the battery cell assemblies (120_3, 120_4). A third portion (153WG3) of the waveguide (153WG) may overlap with a BMS (140).

[0145] A first portion (153WG1) of the waveguide (153WG) may overlap with an antenna (123A) of a first integrated circuit assembly (123) of each of the battery cell assemblies (120_1, 120_2) in the Z direction. A second portion (153WG2) of the waveguide (153WG) may overlap with an antenna (123A) of a first integrated circuit assembly (123) of each of the battery cell assemblies (120_3, 120_4) in the Z direction. A third portion (153WG3) of the waveguide (153WG) may overlap with an antenna (140A) of a BMS (140) in the Z direction.

[0146] The waveguide (153WG) can provide a channel for wireless communication between the antenna (123A) of the first integrated circuit assembly (123) of each of the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4) and the antenna (140A) of the BMS (140).

[0147] The lead (153) may include a base portion (153B), a rising portion (153E), and a connecting portion (153C). The distance between the rising portion (153E) and the base plate (110B) may be different from the distance between the base portion (153B) and the base plate (110B). The distance between the rising portion (153E) and the base plate (110B) may be greater than the distance between the base portion (153B) and the base plate (110B). The connecting portion (153C) may connect the rising portion (153E) and the base portion (153B).

[0148] As a non-limiting example, the lead (153) may be provided by a casting process. Accordingly, the base portion (153B), the rising portion (153E), and the connecting portion (153C) of the lead (153) may be continuous elements of the lead (153) rather than elements joined by welding, bolting, or the like.

[0149] The connecting portion (153C) may be, but is not limited to, slanted in the Z direction. The connecting portion (153C) may also be parallel to the Z direction. The base portion (153B) and the rising portion (153E) may be substantially perpendicular to the Z direction.

[0150] The height (153WGH) of the waveguide (153WG) in the Z direction can be defined as the distance in the Z direction between the base portion (153B) and the rising portion (153E). The height (153WGH) of the waveguide (153WG) can be in a range of about 1 mm to about 10 mm. The height (153WGH) of the waveguide (153WG) can be about 2 mm or more. The height (153WGH) of the waveguide (153WG) can be about 3 mm or more. The height (153WGH) of the waveguide (153WG) can be about 4 mm or more. The height (153WGH) of the waveguide (153WG) can be about 9 mm or less. The height (153WGH) of the waveguide (153WG) can be about 8 mm or less. The height (153WGH) of the waveguide (153WG) may be about 7 mm or less. The height (153WGH) of the waveguide (153WG) may be about 6 mm or less.

[0151] The width (153WGW) of the waveguide (153WG) in the Y direction can be defined as the width of the rising portion (153E) in the Y direction. The width (153WGW) of the waveguide (153WG) can be in a range of about 100 mm to about 200 mm. The width (153WGW) of the waveguide (153WG) can be about 110 mm or more. The width (153WGW) of the waveguide (153WG) can be about 120 mm or more. The width (153WGW) of the waveguide (153WG) can be about 130 mm or more. The width (153WGW) of the waveguide (153WG) can be about 140 mm or more. The width (153WGW) of the waveguide (153WG) may be about 190 mm or less. The width (153WGW) of the waveguide (153WG) may be about 180 mm or less. The width (153WGW) of the waveguide (153WG) may be about 170 mm or less. The width (153WGW) of the waveguide (153WG) may be about 160 mm or less.

[0152]

[0153] (Example 5)

[0154] FIG. 12 is a plan view showing a battery pack (104) according to exemplary embodiments.

[0155] Fig. 13 is a cross-sectional view taken along the cutting line 12I-12I' of Fig. 12.

[0156] Referring to FIGS. 12 and 13, a battery pack (104) may include a pack housing (110, see FIG. 2), a plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4, see FIG. 2), a center beam (131, see FIG. 2), cross beams (133, see FIG. 2), reinforcing parts (135, see FIG. 2), a BMS (140, see FIG. 2), and a lead (154). The battery pack (104) is the final form of a battery system mounted on mobility, etc.

[0157] The pack housing (110, see FIG. 2), the plurality of battery cell assemblies (120_1, 120_2, 120_3, 120_4, see FIG. 2), the center beam (131, see FIG. 2), the cross beams (133, see FIG. 2), the reinforcing parts (135, see FIG. 2), and the BMS (140, see FIG. 2) are substantially the same as those described with reference to FIGS. 1 to 3, and therefore, a duplicate description thereof will be omitted.

[0158] The lead (154) may include a waveguide (154WG) and a shield (154SH). The waveguide (154WG) may be substantially the same as the waveguide (150WG) of FIG. 1. The lead (154) may be coupled to the sidewalls (110S). The lead (154) may cover elements disposed inside the battery pack (100), such as battery cell assemblies (120_1, 120_2, 120_3, 120_4, see FIG. 2) and electrical components. The lead (154) may be fixed to the pack housing (110, see FIG. 2) by a mechanical coupling means, such as a bolt.

[0159] The planar shape of the shield (154SH) may include a C-shape. The shield (154SH) may include first and second portions (154SH1, 154SH2) extending in the X-direction and a third portion (154SH3) extending in the Y-direction. The third portion (154SH3) may be between the first and second portions (154SH1, 154SH2). The third portion (154SH3) may be connected to each of the first and second portions (154SH1, 154SH2). The third portion (154SH3) may be connected to an end of each of the first and second portions (154SH1, 154SH2) in the X-direction.

[0160] The shield (154SH) may partially surround the waveguide (154WG). The shield (154SH) may partially surround the antennas (123A) and the antenna (140A). The shield (154SH) may prevent or mitigate attenuation of signals transmitted from the antennas (123A) to the antenna (140A). In addition, the shield (154SH) may block or mitigate interference in communication between the antennas (123A, 140A) caused by wireless signals external to the battery pack (100).

[0161] The shield (154SH) may include a base portion (154B), a lower portion (154L), and a connecting portion (154C). The distance between the lower portion (154L) and the base plate (110B) may be different from the distance between the base portion (154B) and the base plate (110B). The distance between the lower portion (154L) and the base plate (110B) may be smaller than the distance between the base portion (154B) and the base plate (110B). The connecting portion (154C) may connect the lower portion (154L) and the base portion (154B).

[0162] According to exemplary embodiments, in the lower portion (154L), the space between the battery cell assembly (120) and the lead (154) can be reduced or eliminated, and thus the shield (154SH) can be configured to block transmission of wireless signals.

[0163] As a non-limiting example, the lead (154) may be provided by a casting process. Accordingly, the base portion (154B), the lower portion (154L), and the connecting portion (154C) of the lead (154) may be continuous elements of the lead (154) rather than elements joined by welding, bolting, or the like.

[0164] The connecting portion (154C) may be, but is not limited to, slanted in the Z direction. The connecting portion (154C) may also be parallel to the Z direction. The base portion (154B) and the rising portion (154E) may be substantially perpendicular to the Z direction.

[0165]

[0166] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. Pack housing including base plate and side walls; A plurality of battery cell assemblies arranged on the base plate, each of the plurality of battery cell assemblies including a plurality of battery cells and an integrated circuit assembly coupled to the plurality of battery cells and including a first antenna; A BMS (Battery Management System) including a second antenna; and Including leads coupled to the above side walls, The above lead includes a waveguide overlapping the first antenna and the second antenna of each of the plurality of battery cell assemblies, The above lead comprises a base portion and a rising portion spaced further from the base plate than the base portion, and A battery pack characterized in that the above waveguide is located in the rising section.

2. In paragraph 1, The plurality of battery cells of each of the plurality of battery cell assemblies are arranged in a first direction parallel to the mounting surface of the base plate, and A battery pack, characterized in that the waveguide extends in the first direction.

3. In paragraph 1, The plurality of battery cells of each of the plurality of battery cell assemblies are arranged in a first direction parallel to the mounting surface of the base plate, A battery pack, characterized in that the waveguide includes a first portion extending in the first direction and a second portion extending in a second direction perpendicular to the first direction.

4. In paragraph 3, The first portion of the waveguide overlaps the first antenna of each of the plurality of battery cell assemblies, and A battery pack, characterized in that the second portion of the waveguide overlaps the second antenna.

5. In paragraph 1, Cross beams interposed between the plurality of battery cell assemblies; and Further comprising reinforcing parts coupled to the above cross beams, The above reinforcing member is spaced from the base plate with the cross beams interposed therebetween, and A battery pack characterized in that the above waveguide overlaps the above reinforcing component.

6. In paragraph 1, A battery pack further comprising first reinforcing brackets coupled to the lead and spaced apart from each other with the waveguide therebetween.

7. In paragraph 6, A battery pack further comprising a second reinforcing bracket interposed between the first reinforcing brackets.

8. In paragraph 7, The plurality of battery cells of each of the plurality of battery cell assemblies are arranged in a first direction parallel to the mounting surface of the base plate, and A battery pack, characterized in that each of the first reinforcing brackets extends in the first direction.

9. In paragraph 8, A battery pack, characterized in that the second reinforcing bracket extends in a second direction perpendicular to the first direction.

10. In paragraph 9, A battery pack, characterized in that the reinforcing bracket overlaps the waveguide in the first direction.

11. In paragraph 1, A battery pack, characterized in that the height of the waveguide is in the range of 1 mm to 10 mm.

12. In paragraph 1, A battery pack, characterized in that the width of the waveguide is in the range of 100 mm to 200 mm.

13. In paragraph 1, The above lead further comprises a shield partially surrounding the waveguide, and The above lead further comprises a lower portion closer to the base plate than the base portion, and A battery pack characterized in that the above shield is located in the lower portion.

14. In paragraph 13, A battery pack, characterized in that the plane shape of the shield includes a C shape.

15. Pack housing including base plate and side walls; First to fourth battery cell assemblies arranged on the base plate, each of the first to fourth battery cell assemblies including a plurality of battery cells and an integrated circuit assembly coupled to the plurality of battery cells and including a first antenna; BMS including a second antenna; and Including leads coupled to the above side walls, The lead comprises a waveguide including a first portion overlapping the first antenna of each of the first and second battery cell assemblies, a second portion overlapping the first antenna of each of the third and fourth battery cell assemblies, and a third portion overlapping the second antenna, The above lead comprises a base portion and a rising portion spaced further from the base plate than the base portion, and A battery pack characterized in that the above waveguide is located in the rising section.

16. In paragraph 15, A battery pack, characterized in that the planar shape of the above waveguide includes a C shape.

17. In paragraph 15, Each of the first and second parts extends in a first direction parallel to the mounting surface of the base plate, A battery pack characterized in that the third portion extends in a second direction that is parallel to the mounting surface and perpendicular to the first direction.

18. In paragraph 15, A battery pack, characterized in that the third portion is interposed between the first and second portions.

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