Battery pack

Abstract

According to an exemplary embodiment, a battery pack is provided. The battery pack includes a pack housing including a base plate and side walls, and 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, the integrated circuit assembly being coupled to the plurality of battery cells and including a first antenna, a Battery Management System (BMS) including a second antenna, and a lid coupled to the side walls, the lid including waveguides that overlap with the first and second antennas of each of the plurality of battery cell assemblies, the lid including a base portion and a raised portion further away from the base plate than the base portion, the waveguides being located in the raised portion.

Description

Technical Field

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

Background Art

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as an energy source for various cordless devices such as handsets, notebook computers, and cordless vacuum cleaners. In recent years, due to improvements in energy density and economies of scale, the manufacturing cost per unit capacity of secondary batteries has been significantly reduced, and as the driving range of battery electric vehicles (BEVs) has increased to a level comparable to that of fuel vehicles, the main application of secondary batteries has shifted from mobile devices to mobility.

[0003] The trend in the technological development of secondary batteries for mobility is the improvement of energy density and safety. Here, the energy density of a secondary battery is the value obtained by dividing the maximum electrical energy that the secondary battery can store by the mass of the secondary battery. Since a high energy density of a secondary battery directly contributes to the driving efficiency and driving range of mobility, various studies have been conducted to improve the energy density of secondary batteries.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the technical idea of the present invention is to provide a battery pack with improved energy density.

Means for Solving the Problems

[0005] According to an exemplary embodiment for solving the above-mentioned problems, a battery pack is provided. The battery pack includes a pack housing including a base plate and a side wall, 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, the integrated circuit assembly being coupled to the plurality of battery cells and including a first antenna, a Battery Management System (BMS) including a second antenna, and a lid coupled to the side wall, the lid including waveguides that overlap with the first and second antennas of each of the plurality of battery cell assemblies, the lid including a base portion and a raised portion further away from the base plate than the base portion, the waveguides being located in the raised portion.

[0006] Each of the plurality of battery cells in the plurality of battery cell assemblies is 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 in 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 with the first antenna of each of the multiple battery cell assemblies, and the second portion of the waveguide overlaps with the second antenna.

[0009] The battery pack further includes a crossbeam interposed between the plurality of battery cell assemblies and a reinforcing component coupled to the crossbeam, wherein the reinforcing component is separated from the base plate with the crossbeam in between, and the waveguide overlaps with the reinforcing component.

[0010] The battery pack is coupled to the lid and further includes first reinforcing brackets spaced apart from each other with the waveguide in between.

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

[0012] Each of the plurality of battery cells in the plurality of battery cell assemblies is 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 second reinforcing bracket extends in a second direction perpendicular to the first direction.

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

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

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

[0017] The lid further includes a shield that partially encloses the waveguide, the lid further includes a descending portion closer to the base plate than the base portion, and the shield is located in the descending portion.

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

[0019] According to an exemplary embodiment, a battery pack is provided. The battery pack includes a pack housing including a base plate and side walls, and first to fourth battery cell assemblies disposed on the base plate, each of the first to fourth battery cell assemblies including a plurality of battery cells, an integrated circuit assembly including a first antenna coupled to the plurality of battery cells, a BMS including a second antenna, and a lid coupled to the side walls, the lid including a waveguide, the waveguide including a first portion overlapping the first antenna of the first and second battery cell assemblies, each of the third and fourth battery cell assemblies, a second portion overlapping the first antenna of the third and fourth battery cell assemblies, and a third portion overlapping the second antenna, the lid including a base portion and a raised portion further away from the base plate than the base portion, the waveguide being located in the raised 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 part described above intersects with the first and second parts described above. [Effects of the Invention]

[0023] An exemplary embodiment of the present invention allows for monitoring of the voltage and temperature of the battery cell assembly using wireless communication. This eliminates the need for wiring for signal transmission between the battery cell assembly and the BMS (Battery Management System), thereby improving the energy density of the battery pack.

[0024] The effects 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 having ordinary knowledge in the technical field to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects associated with implementing the exemplary embodiments of the present disclosure can also be derived by those having ordinary knowledge in the technical field from the exemplary embodiments of the present disclosure.

Brief Description of the Drawings

[0025] [Figure 1] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 2] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 3] It is a cross-sectional view taken along the cut line 1I-1I' of FIG. 1. [Figure 4] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 5] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 6] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 7] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 8] It is a cross-sectional view taken along the cut line 6I-6I' of FIG. 6. [Figure 9] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 10] It is a plan view showing a battery pack according to an exemplary embodiment. [Figure 11] It is a cross-sectional view taken along the cut line 9I-9I' of FIG. 9. [Figure 12] It is a plan view showing a battery pack 104 according to an exemplary embodiment. [Figure 13] It is a cross-sectional view taken along the cut line 12I-12I' of FIG. 12.

Modes for Carrying Out the Invention

[0026] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. As a premise, terms and words used herein and in the claims should not be interpreted in a manner limited to their usual or dictionary meanings, but rather in a manner consistent with the technical idea of ​​the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their own invention.

[0027] Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention; there may be a variety of equivalents and modifications that can substitute for them at the time of filing.

[0028] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, such detailed description will be omitted.

[0029] Since embodiments of the present invention are provided to more fully explain the invention to an ordinary person, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes and proportions.

[0030] (First Embodiment) Figure 1 is a plan view showing a battery pack 100 according to an exemplary embodiment.

[0031] Figure 2 is a plan view showing a battery pack 100 according to an exemplary embodiment. In Figure 2, the lid 150 is omitted to allow for a more complete understanding of the positional relationships between the elements of the battery pack 100.

[0032] Figure 3 is a cross-sectional view along the cutting line 1I-1I' in Figure 1.

[0033] Referring to Figures 1 to 3, the battery pack 100 may include a pack housing 110, multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4, a center beam 131, a cross beam 133, reinforcing components 135, a BMS (Battery Management System) 140, and a lid 150. The battery pack 100 is the final form of a battery system installed in a mobility vehicle or the like.

[0034] The pack housing 110 may include a base plate 110B and a side wall 110S. Here, two directions substantially parallel to the mounting surface 110M of the base plate 110B are defined as the X and Y directions, and a direction substantially perpendicular to the mounting surface 110M of the base plate 110B is defined as the Z direction. The X, Y, and Z directions may be substantially perpendicular to each other.

[0035] The base plate 110B may have a flat shape. The side wall 110S may be substantially perpendicular to the base plate 110B. The side wall 110S may be located on the edge portion of the base plate 110B.

[0036] The base plate 110B and the side wall 110S can each be supplied by an extrusion process. The base plate 110B may include multiple plates joined by friction stir welding.

[0037] Multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be arranged on the mounting surface 110M of the base plate 110B of the pack housing 110. In this example, battery cell assemblies 120_1 and 120_2 can be arranged in the X direction, battery cell assemblies 120_3 and 120_4 can be arranged in the X direction, battery cell assemblies 120_1 and 120_3 can be arranged in the Y direction, and battery cell assemblies 120_2 and 120_4 can be arranged in the Y direction. This results in multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 forming a 2x2 matrix, but this is for illustrative purposes only and does not limit the technical idea of ​​the present invention in any way.

[0038] The base plate 110B can support multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4. The side wall 110S can horizontally enclose the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4.

[0039] In the following, the technical idea of ​​the present invention will be described with reference to embodiments in which the battery pack 100 is of a moduleless type and each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 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 of ordinary skill in the art can easily arrive at multiple battery cell assemblies including a module frame and a module-type battery pack including therein based on what is described herein.

[0040] Each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 may include multiple battery cells 121, a first integrated circuit assembly 123, a second integrated circuit assembly 124, and an FFC (Flexible Flat Cable) assembly 127.

[0041] Each of the multiple battery cells 121 may include an electrode assembly, a positive lead connected to the positive tab of the electrode assembly, a negative lead connected to the negative tab of the electrode assembly, an electrolyte, and a case. Each of the multiple battery cells 121 may be one of a cylindrical battery cell, a prismatic battery cell, or a pouch-type battery cell. The electrode assembly of a cylindrical battery cell is housed in a cylindrical metal can. The electrode assembly of a prismatic battery cell is housed in a prismatic metal can. The electrode assembly of a pouch-type battery cell is housed in a pouch case containing an aluminum laminate sheet.

[0042] An electrode assembly includes a positive electrode, a negative electrode, and a separator membrane interposed between the positive and negative electrodes. A jelly roll type electrode assembly consists of a rolled positive electrode, a negative electrode, and a separator membrane interposed between them. A stack type electrode assembly includes multiple positive electrodes, multiple negative electrodes, and multiple separator membranes interposed between them, stacked sequentially.

[0043] According to an exemplary embodiment, a plurality of battery cells 121 can constitute a plurality of banks. Each of the plurality of banks may contain one or more parallel-connected battery cells 121. The plurality of banks can be connected in series with one another.

[0044] The negative leads of one or more battery cells 121 in each of multiple banks can be short-circuited to the positive leads of one or more battery cells 121 in subsequent banks. The negative leads of one or more battery cells 121 in each of multiple banks can be welded to the positive leads of one or more battery cells 121 in subsequent banks.

[0045] The positive leads of one or more battery cells 121 in each of the multiple banks can be short-circuited to the negative leads of one or more battery cells 121 in the preceding bank. The positive leads of one or more battery cells 121 in each of the multiple banks can be welded to the negative leads of one or more battery cells 121 in the preceding bank.

[0046] The number of battery cells 121 contained in each of the multiple banks and the number of banks connected in series with each other can be determined according to the voltage and current that each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 is intended to output.

[0047] According to an exemplary embodiment, the cell stack may further include a plurality of separators. The plurality of separators can absorb the swelling of the plurality of battery cells 121. According to an exemplary embodiment, the plurality of separators may be a thermal barrier. According to an exemplary embodiment, each of the plurality of separators may have a high melting temperature and a low thermal conductivity. According to an exemplary embodiment, each of the plurality of separators may include a flame retardant material such as ceramic and coated glass material. According to an exemplary embodiment, the plurality of separators may be configured to release a fire retarding material and a fire extinguishing agent in the event of a thermal runaway event.

[0048] The first integrated circuit assembly 123 and the second integrated circuit assembly 124 can be separated in the Y direction with multiple battery cells 121 in between. The first integrated circuit assembly 123 and the second integrated circuit assembly 124 can be electrically connected by an FFC assembly 127. This allows sensing values ​​(e.g., voltage, current, and / or temperature) from the second integrated circuit assembly 124 to be transmitted to the first integrated circuit assembly 123 via the FFC assembly 127.

[0049] According to an exemplary embodiment, each first integrated circuit assembly 123 of a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be located in the center of the pack housing 110 (for example, in the center in the Y direction). Each first integrated circuit assembly 123 of a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can face the center beam 131.

[0050] According to an exemplary embodiment, each second integrated circuit assembly 124 of a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be positioned on the edge of the pack housing 110 (for example, the edge in the Y direction). Each second integrated circuit assembly 124 of a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can face the side wall 110S.

[0051] According to an exemplary embodiment, the distance between each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the center beam 131 may be smaller than the distance between each of the multiple battery cell assemblies 120_1, 120_2, and 120_4 and the center beam 131.

[0052] 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, busbars, a sensing plate, a sensing bar, a temperature sensor, wiring, and an insulating cover.

[0053] The insulating frame may include insulating materials such as plastic. The insulating frame can cover the front of multiple battery cells 121. The insulating frame can support integrated circuits, busbars, sensing plates, sensing bars, temperature sensors, and wiring.

[0054] The busbar can be short-circuited to the positive leads of one or more battery cells 121 in the first bank and the negative leads of one or more battery cells 121 in the last bank. The busbar can be welded to the positive leads of one or more battery cells 121 in the first bank and the negative leads of one or more battery cells 121 in the last bank. The resulting voltages of each of the multiple battery cells 121 in the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be output through the busbar. The busbar can be fixed to an insulating frame.

[0055] The integrated circuit can be mounted on an insulating frame. Positive and negative leads, welded to each other, can constitute nodes within the battery cell assembly 120. The integrated circuit can be configured to measure the voltage at the nodes.

[0056] The sensing bar may contain a conductive material. The sensing bar may have a rod shape. The sensing bar may be short-circuited to a busbar. The sensing bar may be coupled to a busbar. The voltage of the busbar may be measured via the sensing bar.

[0057] Each of the sensing plates may have a patch shape or a pad shape. The sensing plates may contain conductive material. The sensing plates may be short-circuited to the corresponding positive and negative leads of the battery cells 121.

[0058] Each of the multiple sensing plates can be connected to an integrated circuit. Through the multiple sensing plates, the voltages of multiple nodes in each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be measured.

[0059] The temperature sensors can be configured to measure the temperature at multiple points on the battery cell assembly 120. The temperature sensors can be arranged in the X, Y, and Z directions, thereby allowing the temperature distribution within the battery cell assembly 120 to be measured.

[0060] Antenna 123A can be configured to communicate with BMS 140. As a non-limiting example, antenna 123A can use a wireless LAN frequency such as the 2.4 GHz band. The bandwidth of the 2.4 GHz band is approximately 80 MHz and can include 14 overlapping channels. Of the 14 overlapping channels, approximately 3 channels can be used simultaneously without signal interference.

[0061] Antenna 123A can be mounted on the integrated circuit of the first integrated circuit assembly. Antenna 123A can be configured to transmit signals representing voltage and temperature measurements of the battery cell assembly 120.

[0062] The insulating cover may contain an insulating material such as plastic. The insulating cover can be mated and coupled to an insulating frame. The insulating cover can cover the integrated circuit, busbars, sensing plate, sensing bar, and temperature sensor, thereby protecting the electrical elements of the first integrated circuit assembly 123.

[0063] The second integrated circuit assembly 124 may include an insulating frame, an integrated circuit, a sensing plate, a temperature sensor, wiring, and an insulating cover. The second integrated circuit assembly 124 is substantially similar to the first integrated circuit assembly 123, except that it does not include busbars and sensing bars.

[0064] The center beam 131 can be enclosed by side walls 110S. This allows the center beam to divide the space defined by the pack housing 110. The center beam 131 can be included in one of the multiple plates of the base plate 110B and formed together with one of the multiple plates by an extrusion process, or welded to one of the multiple plates of the base plate 110B.

[0065] The center beam 131 can extend along the X direction. The center beam 131 can isolate battery cell assemblies 120_1, 120_2 and battery cell assemblies 120_3, 120_4 in the Y direction. The center beam 131 can be interposed between battery cell assemblies 120_1, 120_2 and battery cell assemblies 120_3, 120_4.

[0066] The crossbeam 133 can extend along the Y direction. The crossbeam 133 can isolate multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 in the X direction. In the X direction, the crossbeam 133 can be interposed between battery cell assemblies 120_1, 120_2, 120_3, and 120_4, or between battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the side wall 110S. In the Y direction, the crossbeam 133 can be interposed between the side wall 110S and the center beam 131.

[0067] A typical engineer in the industry can easily arrive at the structure in which the crossbeam 133 is integrated into the battery cell assemblies 120_1, 120_2, 120_3, and 120_4 based on what is described herein.

[0068] The reinforcing component 135 can be connected to each of the crossbeams 133 that are spaced apart in the Y direction. The reinforcing component 135 can improve the impact resistance and vibration resistance of the crossbeams 133.

[0069] The BMS140 can be placed in the EMR (Electronic Components Mounting Area) of the pack housing 110. The BMS140 can be placed between the side wall 110S where the exhaust device is installed and a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4.

[0070] The BMS140 can be configured to perform tasks such as monitoring, balancing, and controlling the battery pack. Monitoring of the battery pack 100 may include measuring the voltage and current of specific nodes within multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4, and measuring the temperature of set locations within the battery pack 100. The BMS140 may include an antenna 140A for receiving signals transmitted from the antenna 123A of the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4, indicating the voltage and temperature inside the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4.

[0071] Balancing the battery pack 100 is an operation that reduces deviations between multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4. Control of the battery pack 100 includes preventing overcharging, over-discharging, and overcurrent. Through monitoring, balancing, and control, the battery pack 100 can operate under optimal conditions, thereby preventing shortening of the lifespan of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4.

[0072] The lid 150 can be coupled to the side wall 110S. The lid 150 can cover elements located inside the battery pack 100, such as battery cell assemblies 120_1, 120_2, 120_3, 120_4, and electrical components. The lid 150 can be secured to the pack housing 110 by mechanical coupling means, such as bolts.

[0073] Lid 150 may include waveguide 150WG. Waveguide 150WG may extend in the X direction. Waveguide 150WG may overlap in the Z direction with the first integrated circuit assembly 123 and BMS 140 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4. Waveguide 150WG may overlap in the Z direction with the antenna 123A of the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the antenna 140A of the BMS 140. Waveguide 150WG can provide a channel for wireless communication between the antenna 123A of the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the antenna 140A of the BMS 140.

[0074] The lid 150 may include a base portion 150B, an upward portion 150E, and a connecting portion 150C. The distance between the upward portion 150E and the base plate 110B may differ from the distance between the base portion 150B and the base plate 110B. The distance between the upward 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 can connect the upward portion 150E and the base portion 150B.

[0075] As a non-limiting example, the lid 150 may be provided by a casting process. In this way, the base portion 150B, the rise portion 150E, and the connecting portion 150C of the lid 150 may be continuous elements of the lid 150, rather than elements joined by welding and bolting or the like.

[0076] The connecting portion 150C may be oblique to the Z direction, but is not limited to this. 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.

[0077] The Z-direction height 150WGH of waveguide 150WG can be defined as the Z-direction distance between the base section 150B and the rising section 150E. The height 150WGH of waveguide 150WG can be in the range of approximately 1 mm to approximately 10 mm. The height 150WGH of waveguide 150WG can be approximately 2 mm or more. The height 150WGH of waveguide 150WG can be approximately 3 mm or more. The height 150WGH of waveguide 150WG can be approximately 4 mm or more. The height 150WGH of waveguide 150WG can be approximately 9 mm or less. The height 150WGH of waveguide 150WG can be approximately 8 mm or less. The height 150WGH of waveguide 150WG can be approximately 7 mm or less. The height 150WGH of waveguide 150WG can be approximately 6 mm or less.

[0078] The Y-direction width 150WGW of waveguide 150WG can be defined as the Y-direction width of the rising section 150E. The width 150WGW of waveguide 150WG can be in the range of approximately 100 mm to approximately 200 mm. The width 150WGW of waveguide 150WG can be approximately 110 mm or more. The width 150WGW of waveguide 150WG can be approximately 120 mm or more. The width 150WGW of waveguide 150WG can be approximately 130 mm or more. The width 150WGW of waveguide 150WG can be approximately 140 mm or more. The width 150WGW of waveguide 150WG can be approximately 190 mm or less. The width 150WGW of waveguide 150WG can be approximately 180 mm or less. The width 150WGW of waveguide 150WG can be approximately 170 mm or less. The width of a 150WG waveguide (150WGW) may be approximately 160mm or less.

[0079] The internal space of the battery pack 100 is partitioned by a crossbeam 133. In this case, the crossbeam 133 contains a metallic material such as aluminum, which may interfere with radio wave transmission inside the battery pack 100. According to an exemplary embodiment, by forming a waveguide 150WG with a locally raised structure in the lid 150, interference with the environment of the application in which the battery pack 100 is mounted (e.g., the vehicle body) can be prevented, while allowing wireless communication inside the battery pack 100. This eliminates the need for wiring for connecting the multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4 and the BMS 140, and can improve the energy density of the battery pack 100 (more specifically, the energy density per unit volume).

[0080] The battery pack 100 may further include an exhaust device. The exhaust device may be coupled to any one of the side walls 110S. A side wall 110S coupled to the exhaust device may include an exhaust path connected to the exhaust device. The exhaust device may be configured to slow down thermal propagation by releasing hot gas from inside the battery pack 100 to the outside when at least one of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 is in a thermal runway state.

[0081] Here, thermal runaway in multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 is a state in which the temperature change of multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 further accelerates that temperature change, resulting in an uncontrollable positive feedback loop. In a thermal runaway state, multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 exhibit a rapid temperature increase and emit large amounts of high-pressure gas and combustion residue.

[0082] The battery pack 100 may further include additional electrical components. The additional electrical components may be located on the pack housing 110. The additional electrical components may be located in the electrical component mounting area EMR. The additional electrical components may be located between the side wall 110S where the exhaust device is installed and the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4.

[0083] Additional electrical components may include a cooling system, a Power Relay Assembly (PRA), a safety plug, and the like. The cooling system may include a cooling fan. The cooling fan can prevent overheating of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 by circulating air inside the battery pack 100. The PRA can be configured to supply or cut off power from the high-voltage battery to an external load (e.g., the vehicle's motor). The PRA can protect the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the external load (e.g., the vehicle's motor) by cutting off the power supply to the external load (e.g., the vehicle's motor) in situations where abnormal voltages occur, such as voltage surges.

[0084] (Second Embodiment) Figure 4 is a plan view showing a battery pack 101 according to an exemplary embodiment.

[0085] Figure 5 is a plan view showing a battery pack 101 according to an exemplary embodiment. In Figure 5, the lid 151 is omitted to allow for a more complete understanding of the positional relationships between the elements of the battery pack 101.

[0086] Referring to Figures 4 and 5, the battery pack 101 may include a pack housing 110, multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4, a center beam 131, a cross beam 133, a reinforcing component 135, a BMS 140, and a lid 151. The battery pack 101 is the final form of a battery system installed in a mobility vehicle or the like.

[0087] The pack housing 110, the multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4, the center beam 131, the cross beam 133, and the reinforcing components 135 are substantially the same as those described with reference to Figures 1 to 3, so redundant descriptions of them are omitted. The BMS 140 is the same as the BMS 140 in Figure 2, but can be positioned at a location away from the center of the electrical component mounting area EMR (e.g., the center in the Y direction).

[0088] The lid 151 can be coupled to the side wall 110S. The lid 151 can cover elements located inside the battery pack 101, such as battery cell assemblies 120_1, 120_2, 120_3, 120_4, and electrical components. The lid 151 can be secured to the pack housing 110 by mechanical coupling means, such as bolts.

[0089] The lid 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, but is not limited to, be connected to the second portion 151WG2. The first portion 151WG1 and the second portion WG2 may be separated from each other.

[0090] Waveguide 151WG can overlap in the Z direction with the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4, and with the BMS 140. Waveguide 151WG can overlap in the Z direction with the antenna 123A of the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4, and with the antenna 140A of the BMS 140.

[0091] The first part 151WG1 of waveguide 151WG can overlap in the Z direction with the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4. The second part 151WG2 of waveguide 151WG can overlap in the Z direction with BMS 140. The first part 151WG1 of waveguide 151WG can overlap in the Z direction with the antenna 123A of each of the first integrated circuit assembly 123 of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4. The second part 151WG2 of waveguide 151WG can overlap in the Z direction with the antenna 140A of BMS 140. Waveguide 151WG can provide a channel for wireless communication between the antenna 123A of the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the antenna 140A of the BMS 140.

[0092] The first part 151WG1 of waveguide 151WG may be substantially the same as waveguide 150WG in Figure 1. The height of the second part 151WG2 of waveguide 151WG may be substantially the same as the height of the first part 151WG1 of waveguide 151WG. The width of the second part 151WG2 of waveguide 151WG may be substantially the same as the width of the first part 151WG1 of waveguide 151WG.

[0093] (Third embodiment) Figure 6 is a plan view showing a battery pack 102 according to an exemplary embodiment.

[0094] Figure 7 is a plan view showing a battery pack 102 according to an exemplary embodiment. In Figure 7, the lid 152 is omitted to allow for a more complete understanding of the positional relationships between the elements of the battery pack 102.

[0095] Figure 8 is a cross-sectional view along the cutting line 6I-6I' in Figure 6.

[0096] Referring to Figures 6 to 8, the battery pack 102 may include a pack housing 110, multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4, a center beam 131, a cross beam 133, reinforcing components 135, a BMS 140, a lid 152, a first reinforcing bracket 161, and a second reinforcing bracket 162. The battery pack 102 is the final form of a battery system to be installed in a mobility vehicle or the like.

[0097] The pack housing 110, the multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4, the center beam 131, the cross beam 133, the reinforcing component 135, and the BMS 140 are substantially the same as those described with reference to Figures 1 to 3, so redundant descriptions of them are omitted.

[0098] The first reinforcing bracket 161 can extend in the X direction. The first reinforcing bracket 161 can overlap in the Z direction with a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4. In this example, each of the first reinforcing brackets 161 can overlap in the Z direction with each of the battery cell assemblies 120_1, 120_2, 120_3, and 120_4 arranged in the respective extending direction of the first reinforcing bracket 161 (i.e., the X direction). In Figure 7, each of the first reinforcing brackets 161 overlaps with two of the plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4, but this is for illustrative purposes only and does not limit the technical idea of ​​the present invention in any sense. Based on what is described herein, embodiments in which each of the first reinforcing brackets 161 overlaps with three or more battery cell assemblies can be easily arrived at.

[0099] According to exemplary embodiments, the first reinforcing bracket 161 can overlap with a plurality of crossbeams 133 in the Z direction. According to exemplary embodiments, the first reinforcing bracket 161 can be coupled with a plurality of crossbeams 133. In the example, each of the first reinforcing brackets 161 can be coupled with crossbeams 133 arranged in the respective extending direction of the first reinforcing bracket 161 (i.e., the X direction). In Figure 7, each of the first reinforcing brackets 161 is coupled with three crossbeams 133, but this is for illustrative purposes only and does not limit the technical idea of ​​the invention in any sense. A person of ordinary skill in the art can easily arrive at embodiments in which each of the first reinforcing brackets 161 is coupled with two or more crossbeams based on what is described herein.

[0100] The first reinforcing bracket 161 can be connected to each of the crossbeams 133 arranged in the X direction by a fastener. The fastener may be a mechanical fastening means such as bolts. In addition to the first reinforcing bracket 161, the lid 150 can be fixed to the crossbeams 133 by a fastener.

[0101] Each of the first reinforcing brackets 161 may include a base portion 161B, an upward portion 161E, and a connecting portion 161C. Each of the first reinforcing brackets 161 may include a corrugated structure CGS in the Y direction. The base portion 161B, the upward portion 161E, and the connecting portion 161C may be arranged in the Y direction. The Y-direction arrangement of the base portion 161B, the upward portion 161E, and the connecting portion 161C can constitute a corrugated structure CGS. The inclusion of a corrugated structure CGS in the Y direction of the first reinforcing bracket 161 means that the Z-direction position of each part of the first reinforcing bracket 161 varies in a corrugated manner according to its Y-direction position.

[0102] The lifting section 161E can be raised upward from the base section 161B. The distance between each lifting section 161E and the base plate 110B may differ from the distance between the base section 161B and the base plate 110B. The distance between each lifting section 161E and the base plate 110B may be greater than the distance between the base section 161B and the base plate 110B.

[0103] The connecting portion 161C can connect the base portion 161B and the rising portion 161E. Each of the base portion 161B and the rising portion 161E may be substantially parallel to the mounting surface 110M of the base plate 110B. Each of the connecting portions 161C may include either an inclined surface or a curved surface. Each of the connecting portions 161C may be oblique to the mounting surface 110M of the base plate 110B, for example.

[0104] The second reinforcing bracket 162 can extend in the Y direction. The first reinforcing bracket 161 can be separated in the Y direction, and the second reinforcing bracket 162 can be interposed between the first reinforcing brackets 161. The second reinforcing bracket 162 can 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 bracket 161.

[0105] The arrangement of the first reinforcing bracket 161 and the second reinforcing bracket 162 can be substantially C-shaped. The first reinforcing bracket 161 and the second reinforcing bracket 162 can partially enclose the waveguide 162WG. The first reinforcing bracket 161 and the second reinforcing bracket 162 can horizontally and partially enclose antennas 123A and 140A. Each of the antennas 123A can be interposed between the first reinforcing brackets 161. Each of the antennas 123A can overlap with the second reinforcing bracket 162 in the X direction.

[0106] Waveguide 162WG can be interposed between the first reinforcing brackets 161. The first reinforcing brackets 161 can be separated in the Y direction with waveguide 152WG in between. The second reinforcing bracket 162 can overlap waveguide 152WG in the X direction.

[0107] The first reinforcement bracket 161 and the second reinforcement bracket 162 can constitute a shield SH for signals between antenna 123A and antenna 140A. The shield SH can prevent or mitigate attenuation of signals transmitted from antenna 123A to antenna 140A. In addition, the shield SH can block or mitigate interference to communication between antennas 123A and 140A by external radio signals from the battery pack 100.

[0108] The lid 152 can be coupled to the side wall 110S. The lid 152 can cover elements located inside the battery pack 102, such as battery cell assemblies 120_1, 120_2, 120_3, 120_4 and electrical components. The lid 152 can be secured to the pack housing 110 by mechanical coupling means, such as bolts.

[0109] Lid 152 may include waveguide 152WG. Waveguide 152WG is substantially the same as waveguide 150WG in Figure 1, so a redundant explanation of it is omitted. Lid 152 may further include shield coupling 152SM. Lid 152 may include an additional rise 152E for shield coupling 152SM and a connecting portion 152C. Shield coupling 152SM may overlap the first reinforcing bracket 161 and the second reinforcing bracket 162 in the Z direction.

[0110] The distance between each of the lifting sections 152E and the base plate 110B may differ from the distance between the base section 152B and the base plate 110B. The distance between each of the lifting sections 152E and the base plate 110B may be greater than the distance between the base section 152B and the base plate 110B. The connecting section 152C can connect the base section 152B and the lifting sections 152E.

[0111] The base portion 161B can overlap the base portion 152B in the Z direction. The base portion 161B can be in contact with the base portion 152B. The base portion 161B can be welded to the base portion 152B. This provides a first weld WP1 to the base portion 161B and the base portion 152B. The first weld WP1 can be formed, for example, by spot welding.

[0112] The rising section 161E can overlap with the rising section 152E in the Z direction. According to an exemplary embodiment, multiple (e.g., two or more) rising sections 161E can overlap with the rising section 152E in the Z direction. The rising section 161E can be in contact with the rising section 152E. The rising section 161E can be welded to the rising section 152E. This provides a second weld WP2 to the rising sections 161E and 152E. The second weld WP2 can be formed, for example, by spot welding.

[0113] According to an exemplary embodiment, the first reinforcing bracket 161 and the second reinforcing bracket 162 can be coupled to the lid 152 in addition to being coupled to the crossbeam 133. The first reinforcing bracket 161 can reinforce the rigidity of the lid 152, providing a structure that can withstand uniform surface pressure on the top and bottom of the battery cell assembly 120 when multiple battery cells 121 are swollen.

[0114] (Fourth Embodiment) Figure 9 is a plan view showing a battery pack 103 according to an exemplary embodiment.

[0115] Figure 10 is a plan view showing a battery pack 103 according to an exemplary embodiment. In Figure 10, the lid 153 is omitted to allow for a more complete understanding of the positional relationships between the elements of the battery pack 103.

[0116] Figure 11 is a cross-sectional view along the cutting line 9I-9I' in Figure 9.

[0117] Referring to Figures 9 to 11, the battery pack 103 may include a pack housing 110, multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4, a center beam 131, a cross beam 133, a reinforcing component 135, a BMS 140, and a lid 153. The battery pack 103 is the final form of a battery system installed in a mobility vehicle or the like.

[0118] The pack housing 110, center beam 131, cross beam 133, reinforcing component 135, and BMS 140 are substantially the same as those described with reference to Figures 1 to 3, so redundant descriptions of them will be omitted.

[0119] Multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 are substantially the same as those described with reference to Figures 1 to 3, but can be arranged differently from those in Figures 1 to 3. Each of the first integrated circuit assemblies 123 of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be positioned at the edge of the pack housing 110 (for example, the edge in the Y direction). Each of the first integrated circuit assemblies 123 of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can face the side wall 110S.

[0120] According to an exemplary embodiment, each second integrated circuit assembly 124 of a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can be located in the center of the pack housing 110 (for example, in the center in the Y direction). Each second integrated circuit assembly 124 of a plurality of battery cell assemblies 120_1, 120_2, 120_3, and 120_4 can face the center beam 131.

[0121] The lid 153 can be coupled to the side wall 110S. The lid 153 can cover elements located inside the battery pack 100, such as battery cell assemblies 120_1, 120_2, 120_3, 120_4, and electrical components. The lid 153 can be secured to the pack housing 110 by mechanical coupling means, such as bolts.

[0122] The lid 153 may include a waveguide 153WG. The planar shape of the waveguide 153WG may be C-shaped. The waveguide 153WG may include a first portion 153WG1 extending in the X direction, a second portion 153WG2, and a third portion 153WG3 extending in the Y direction. The third portion 153WG3 may be located between the first portion 153WG1 and the second portion 153WG2. The third portion 153WG3 may be connected to each of the first portion 153WG1 and the second portion 153WG2. The third portion 153WG3 may be connected to the X-direction ends of each of the first portion 153WG1 and the second portion 153WG2.

[0123] The first part 153WG1 of waveguide 153WG can overlap with the first integrated circuit assembly 123 of battery cell assemblies 120_1 and 120_2, respectively. The second part 153WG2 of waveguide 153WG can overlap with the first integrated circuit assembly 123 of battery cell assemblies 120_3 and 120_4, respectively. The third part 153WG3 of waveguide 153WG can overlap with BMS 140.

[0124] The first part 153WG1 of waveguide 153WG can overlap in the Z direction with the antenna 123A of the first integrated circuit assembly 123 of battery cell assemblies 120_1 and 120_2, respectively. The second part 153WG2 of waveguide 153WG can overlap in the Z direction with the antenna 123A of the first integrated circuit assembly 123 of battery cell assemblies 120_3 and 120_4, respectively. The third part 153WG3 of waveguide 153WG can overlap in the Z direction with the antenna 140A of BMS 140.

[0125] Waveguide 153WG can provide a channel for wireless communication between the antenna 123A of the first integrated circuit assembly 123 of each of the multiple battery cell assemblies 120_1, 120_2, 120_3, and 120_4 and the antenna 140A of the BMS 140.

[0126] The lid 153 may include a base portion 153B, an upward portion 153E, and a connecting portion 153C. The distance between the upward portion 153E and the base plate 110B may differ from the distance between the base portion 153B and the base plate 110B. The distance between the upward 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 can connect the upward portion 153E and the base portion 153B.

[0127] As a non-limiting example, the lid 153 may be provided by a casting process. In this way, the base portion 153B, the rise portion 153E, and the connecting portion 153C of the lid 153 may be continuous elements of the lid 153, rather than elements joined by welding and bolting or the like.

[0128] The connecting portion 153C may be oblique to the Z direction, but is not limited to this. 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.

[0129] The Z-direction height 153WGH of waveguide 153WG can be defined as the Z-direction distance between the base portion 153B and the rising portion 153E. The waveguide height 153WGH can be in the range of approximately 1 mm to approximately 10 mm. The waveguide height 153WGH can be approximately 2 mm or more. The waveguide height 153WGH can be approximately 3 mm or more. The waveguide height 153WGH can be approximately 4 mm or more. The waveguide height 153WGH can be approximately 9 mm or less. The waveguide height 153WGH can be approximately 8 mm or less. The waveguide height 153WGH can be approximately 7 mm or less. The waveguide height 153WGH can be approximately 6 mm or less.

[0130] The Y-direction width 153WGW of waveguide 153WG can be defined as the Y-direction width of the rising section 153E. The width 153WGW of waveguide 153WG can be in the range of approximately 100 mm to approximately 200 mm. The width 153WGW of waveguide 153WG can be approximately 110 mm or more. The width 153WGW of waveguide 153WG can be approximately 120 mm or more. The width 153WGW of waveguide 153WG can be approximately 130 mm or more. The width 153WGW of waveguide 153WG can be approximately 140 mm or more. The width 153WGW of waveguide 153WG can be approximately 190 mm or less. The width 153WGW of waveguide 153WG can be approximately 180 mm or less. The width 153WGW of waveguide 153WG can be approximately 170 mm or less. The width of waveguide 153WG, 153WGW, may be approximately 160mm or less.

[0131] (Fifth embodiment) Figure 12 is a plan view showing a battery pack 104 according to an exemplary embodiment.

[0132] Figure 13 is a cross-sectional view along the cutting line 12I-12I' in Figure 12.

[0133] Referring to Figures 12 and 13, the battery pack 104 may include a pack housing 110 (see Figure 2), multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4 (see Figure 2), a center beam 131 (see Figure 2), a cross beam 133 (see Figure 2), a reinforcing component 135 (see Figure 2), a BMS 140 (see Figure 2), and a lid 154. The battery pack 104 is the final form of a battery system installed in a mobility vehicle or the like.

[0134] The pack housing 110 (see Figure 2), the multiple battery cell assemblies 120_1, 120_2, 120_3, 120_4 (see Figure 2), the center beam 131 (see Figure 2), the cross beam 133 (see Figure 2), the reinforcing component 135 (see Figure 2), and the BMS 140 (see Figure 2) are substantially the same as those described with reference to Figures 1 to 3, so redundant descriptions of them are omitted.

[0135] The lid 154 may include a waveguide 154WG and a shield 154SH. Waveguide 154WG may be substantially the same as waveguide 150WG in Figure 1. The lid 154 can be coupled to the side wall 110S. The lid 154 can cover elements located inside the battery pack 100, such as battery cell assemblies 120_1, 120_2, 120_3, 120_4 (see Figure 2) and electrical components. The lid 154 can be fixed to the pack housing 110 (see Figure 2) by mechanical coupling means, such as bolts.

[0136] The planar shape of the shield 154SH may include a C-shape. The shield 154SH may include a first portion 154SH1 and a second portion 154SH2 extending in the X direction, and a third portion 154SH3 extending in the Y direction. The third portion 154SH3 may be located between the first portion 154SH1 and the second portion 154SH2. The third portion 154SH3 may be connected to each of the first portion 154SH1 and the second portion 154SH2. The third portion 154SH3 may be connected to the X-direction ends of each of the first portion 154SH1 and the second portion 154SH2.

[0137] The shield 154SH can partially enclose the waveguide 154WG. The shield 154SH can partially enclose antennas 123A and 140A. The shield 154SH can prevent or mitigate attenuation of signals transmitted from antenna 123A to antenna 140A. In addition, the shield 154SH can block or mitigate interference between communication between antennas 123A and 140A due to external radio signals from the battery pack 100.

[0138] The shield 154SH may include a base portion 154B, a lowering portion 154L, and a connecting portion 154C. The distance between the lowering portion 154L and the base plate 110B may differ from the distance between the base portion 154B and the base plate 110B. The distance between the lowering 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 can connect the lowering portion 154L and the base portion 154B.

[0139] According to an exemplary embodiment, in the lowering section 154L, the space between the battery cell assembly 120 and the lid 154 can be reduced or eliminated, thereby allowing the shield 154SH to be configured to block the transmission of radio signals.

[0140] As a non-limiting example, the lid 154 may be provided by a casting process. In this way, the base portion 154B, the lower portion 154L, and the connecting portion 154C of the lid 154 may be continuous elements of the lid 154, rather than elements joined by welding and bolting or the like.

[0141] The connecting portion 154C may be oblique to the Z direction, but is not limited to this. 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.

[0142] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, there may be a variety of equivalents and modifications that can be substituted for them at the time of filing. [Explanation of Symbols]

[0143] 100 Battery Packs 101 Battery Pack 102 Battery Pack 103 Battery Pack 104 Battery Pack 110 Pack Housing 110B Base Plate 110M mounting surface 110S side wall 120 Battery Cell Assembly 120_1 Battery Cell Assembly 120_2 Battery Assembly 120_3 Battery Cell Assembly 120_4 Battery Cell Assembly 121 battery cells 123 First Integrated Circuit Assembly 123A Antenna 124 Second Integrated Circuit Assembly 127 FFC Assembly 131 Center beam 133 Crossbeam 135 Reinforcement parts 140 BMS 140A antenna 150 Lid 150B Base section 150C connection part 150E Ascent Section 150WG waveguide 151 Lid 151WG waveguide 151WG1 Part 1 151WG2 2nd part 152 Lid 152B Base section 152C connection part 152E Ascent Section 152SM Shielded joint 152WG waveguide 153 Lid 153B Base section 153C Connecting part 153E Ascent Section 153WG waveguide 153WG1 Part 1 153WG2 2nd part 153WG3 3rd part 154 Lid 154B Base section 154C connection part 154E Ascent Section 154L descending section 154SH Shield 154SH1 Part 1 154SH2 2nd part 154SH3 3rd part 154WG waveguide 161 First reinforcement bracket 161B Base section 161C Connection part 161E Ascent Section 162 Second reinforcement bracket 162WG waveguide

Claims

1. 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 comprising a plurality of battery cells and an integrated circuit assembly, wherein the integrated circuit assembly is coupled to the plurality of battery cells and includes a first antenna, The BMS (Battery Management System) includes the second antenna, A lid attached to the side wall, The lid includes waveguides that overlap with the first and second antennas of each of the plurality of battery cell assemblies. The lid includes a base portion and an upward portion that is further away from the base plate than the base portion. The waveguide is a battery pack located in the rising section.

2. Each of the plurality of battery cells in the plurality of battery cell assemblies is arranged in a first direction parallel to the mounting surface of the base plate, The waveguide extends in the first direction, as described in claim 1 of the battery pack.

3. Each of the plurality of battery cells in the plurality of battery cell assemblies is arranged in a first direction parallel to the mounting surface of the base plate, The battery pack according to claim 1 or 2, wherein 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. The first portion of the waveguide overlaps with the first antenna of each of the plurality of battery cell assemblies, The battery pack according to claim 3, wherein the second portion of the waveguide overlaps with the second antenna.

5. A crossbeam interposed between the plurality of battery cell assemblies, The invention further includes a reinforcing component coupled to the crossbeam, The reinforcing component is separated from the base plate with the crossbeam in between, The battery pack according to claim 1 or 2, wherein the waveguide overlaps with the reinforcing component.

6. The battery pack according to claim 1 or 2, further comprising a first reinforcing bracket coupled to the lid and spaced apart from each other with the waveguide in between.

7. The battery pack according to claim 6, further comprising a second reinforcing bracket interposed between the first reinforcing brackets.

8. Each of the plurality of battery cells in the plurality of battery cell assemblies is arranged in a first direction parallel to the mounting surface of the base plate, Each of the first reinforcing brackets extends in the first direction, as described in claim 7, for the battery pack.

9. The battery pack according to claim 8, wherein the second reinforcing bracket extends in a second direction perpendicular to the first direction.

10. The battery pack according to claim 9, wherein the reinforcing bracket overlaps the waveguide in the first direction.

11. The battery pack according to claim 1 or 2, wherein the height of the waveguide is in the range of 1 mm to 10 mm.

12. The battery pack according to claim 1 or 2, wherein the width of the waveguide is in the range of 100 mm to 200 mm.

13. The lid further includes a shield that partially encloses the waveguide, The lid further includes a downward portion that is closer to the base plate than the base portion, The shield is located in the lowering portion of the battery pack according to claim 1 or 2.

14. The battery pack according to claim 13, wherein the planar shape of the shield includes a C-shape.

15. A pack housing including a base plate and side walls, A first to fourth battery cell assembly disposed on the base plate, wherein each of the first to fourth battery cell assemblies includes a plurality of battery cells and an integrated circuit assembly, and the integrated circuit assembly is coupled to the plurality of battery cells and includes a first antenna, BMS including the second antenna, A lid attached to the side wall, The lid includes a waveguide, the waveguide includes a first portion overlapping with the first antenna of the first battery cell assembly and the second battery cell assembly, a second portion overlapping with the first antenna of the third battery cell assembly and the fourth battery cell assembly, and a third portion overlapping with the second antenna. The lid includes a base portion and an upward portion that is further away from the base plate than the base portion. The waveguide is a battery pack located in the rising section.

16. The battery pack according to claim 15, wherein the planar shape of the waveguide includes a C-shape.

17. Each of the first and second portions extends in a first direction parallel to the mounting surface of the base plate, The battery pack according to claim 15 or 16, wherein the third portion is parallel to the mounting surface and extends in a second direction perpendicular to the first direction.

18. The third part is the battery pack according to claim 15 or 16, interposed between the first part and the second part.

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