Battery pack and device including the same

Abstract

A battery pack according to an embodiment of the present disclosure includes: a plurality of first battery modules and a plurality of second battery modules, arranged in two rows along a first direction; a battery housing that houses the plurality of first battery modules and the second battery modules and includes a plurality of cross beams that separate between the plurality of first battery modules and between the plurality of second battery modules; a plurality of first slave BMSs, located on a side of the plurality of first battery modules facing the plurality of second battery modules and arranged along the first direction; a plurality of second slave BMSs, located on a side of the plurality of second battery modules facing the plurality of first battery modules and arranged along the first direction; a plurality of first reflection wave absorbers, arranged on a side of the plurality of first battery modules facing the plurality of second battery modules; and a plurality of second reflection wave absorbers, arranged on a side of the plurality of second battery modules facing the plurality of first battery modules.

Description

Technical Field

[0001] Cross - Reference to Related Applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2020-0131093, filed with the Korean Intellectual Property Office on Oct. 12, 2020, the entire disclosure of which is incorporated herein by reference.

[0003] The present disclosure relates to a battery pack and a device including the battery pack, and more particularly, to a battery pack capable of ensuring wireless transmission performance and a device including the battery pack. Background Art

[0004] Rechargeable secondary batteries are widely used as power sources for wireless mobile devices. These batteries have attracted much attention as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), etc., and are proposed as solutions to the air pollution problems of conventional gasoline or diesel vehicles using fossil fuels. When these batteries are alternately charged and discharged, it is necessary to effectively control the charging and discharging of the batteries so that the batteries maintain appropriate operating states and performance.

[0005] To this end, a battery management system (BMS) for managing the states and performance of batteries is provided in the battery pack. The BMS manages the batteries by measuring the current, voltage, temperature, etc. of the batteries and recording them in a memory.

[0006] On the other hand, with the recent increase in the demand for large-capacity secondary battery structures, including using secondary batteries as energy storage sources, the demand for battery packs having a multi-module structure (a component of battery modules in which a plurality of secondary batteries are connected in series / parallel) has also increased.

[0007] Such a battery pack having a multi-module structure can implement various types of battery pack structures according to the configurations of circuits, PCBs, etc. The mainly used is a multi-BMS structure including a plurality of slave BMSs capable of easily controlling the states of secondary batteries and a master BMS for centrally controlling the plurality of slave BMSs.

[0008] In the prior art, communication between the master BMS and the slave BMS uses a wired BMS method, but recently, a wireless BMS method (WBMS, wireless battery management system) has attracted much attention for improvements in, for example, cost reduction, ensuring design freedom, and weight reduction. The wireless BMS method that does not require a wire harness for wired connection used in the conventional technology can bring cost reduction and weight reduction. The weight reduction can also bring the effect of improving the fuel efficiency of an electric vehicle provided with the battery pack. In addition, connectors for wired connection in the prior art can be removed, thereby reducing costs and defective rates.

[0009] One of the most important parts of the wireless BMS method is the performance of the antenna, and the performance of the antenna varies with the working environment of the antenna. In particular, in the case of a battery pack installed on an electric vehicle, it is relatively large in size and surrounded by metal materials on the periphery. Therefore, a multi-path phenomenon may occur due to reflection, and the communication may deteriorate. Therefore, in a wireless BMS system, it is important to design a battery pack structure that can minimize the degradation of wireless communication performance. Summary of the Invention

[0010] Technical Problem

[0011] An object of the present disclosure is to provide a battery pack capable of ensuring wireless transmission performance and a device including the battery pack.

[0012] The object of the present disclosure is not limited to the above object, and those skilled in the art should clearly understand other objects not described herein through the following detailed description.

[0013] Technical Solution

[0014] To achieve the above object, according to an embodiment of the present disclosure, there is provided a battery pack, including: a plurality of first battery modules and a plurality of second battery modules, arranged in two rows along a first direction; a battery housing, accommodating the plurality of first battery modules and the second battery modules and including a plurality of cross beams for separating between the plurality of first battery modules and between the plurality of second battery modules; a plurality of first slave BMSs, located on a side of the plurality of first battery modules facing the plurality of second battery modules and arranged along the first direction; a plurality of second slave BMSs, located on a side of the plurality of second battery modules facing the plurality of first battery modules and arranged along the first direction; a plurality of first reflected wave absorbers, arranged on a side of the plurality of first battery modules facing the plurality of second battery modules; and a plurality of second reflected wave absorbers, arranged on a side of the plurality of second battery modules facing the plurality of first battery modules.

[0015] The battery pack may further include: a first wave path guide member, formed on an upper portion of the plurality of first battery modules and extending along the first direction; and a second wave path guide member, formed on an upper portion of the plurality of second battery modules and extending along the first direction.

[0016] The plurality of first slave BMSs and the plurality of second battery modules may be respectively arranged along the first direction between the first wave path guide member and the second wave path guide member.

[0017] A plurality of first reflected wave absorbers can be arranged below the first wave path guide and the first slave BMS and spaced apart from the first wave path guide and the first slave BMS, and a plurality of second reflected wave absorbers can be arranged below the second wave path guide and the second slave BMS and spaced apart from the second wave path guide and the second slave BMS.

[0018] The battery pack may further include a main BMS formed between the first wave path guide and the second wave path guide and spaced apart from the plurality of first battery modules and the second battery modules.

[0019] The first wave path guide and the second wave path guide may be formed to extend along a first direction to pass through the plurality of first battery modules and the second battery modules, and the main BMS may be arranged at a position spaced apart from the plurality of first battery modules and the second battery modules along the first direction.

[0020] The plurality of first reflected wave absorbers may be arranged to correspond to the plurality of first slave BMSs below the plurality of first slave BMSs, and the plurality of second reflected wave absorbers may be arranged to correspond to the plurality of second slave BMSs below the plurality of second slave BMSs.

[0021] The first wave path guide may be formed between the battery pack upper cover and the plurality of first battery modules, and the second wave path guide may be formed between the battery pack upper cover and the plurality of second battery modules.

[0022] The first slave BMS and the second slave BMS may be formed with antennas.

[0023] The battery pack may further include a battery pack upper cover covering the upper surface of the battery housing, wherein the battery pack upper cover may be formed with at least one hole.

[0024] The battery pack may include: a plurality of first bus bars arranged to span between two adjacent battery modules among the plurality of first battery modules; and a plurality of second bus bars arranged to span between two adjacent battery modules among the plurality of second battery modules.

[0025] According to an embodiment of the present disclosure, there is provided an apparatus including the above battery pack.

[0026] Advantageous Effects

[0027] The battery pack according to an embodiment of the present disclosure and the apparatus including the battery pack can provide a WBMS battery pack with a new structure, thereby ensuring the wireless communication performance of the battery.

[0028] The effects of the present disclosure are not limited to the above effects, and those skilled in the art will clearly understand other additional effects not described above from the description of the appended claims. Description of the Drawings

[0029] Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure;

[0030] Figure 2 is a top view of the battery pack viewed from above Figure 1 thereof;

[0031] Figure 3 shows Figure 1 Part A thereof, which is a view showing a state in which a hole is formed in the upper cover of the battery pack according to an embodiment of the present disclosure;

[0032] Figure 4 shows Figure 2 section B-B thereof, which is a cross-sectional view showing an intermediate portion of the battery pack provided with a reflected wave absorber according to an embodiment of the present disclosure;

[0033] Figure 5 shows Figure 2 Part D thereof, which is a view showing the interval between BMSs according to an embodiment of the present disclosure;

[0034] Figure 6 shows Figure 4 Part C thereof, which is a view showing the height of the outer wall of the battery case according to an embodiment of the present disclosure;

[0035] Figure 7 shows Figure 4 Part C thereof, which is a view showing the height of the cross beam of the battery case according to an embodiment of the present disclosure. Detailed Description

[0036] It should be understood that the exemplary embodiments to be described below are illustratively described to assist in understanding the present disclosure, and various modifications can be made to the present disclosure so as to implement the present disclosure differently from the exemplary embodiments described herein. However, in the description of the present disclosure, when it is determined that specific descriptions and illustrations may unnecessarily obscure the subject matter of the present disclosure, specific descriptions and illustrations of well-known functions or components will be omitted. In addition, for the purpose of assisting in understanding the present disclosure, the drawings are not shown according to actual proportions, but the dimensions of some components may be enlarged.

[0037] As used herein, terms such as first, second, etc. may be used to describe various components, and these components are not limited by these terms. These terms are only used to distinguish one component from another.

[0038] In addition, the terms used in this document are only for describing specific exemplary embodiments and are not intended to limit the scope of the present disclosure. Singular expressions include plural expressions unless they have a clearly opposite meaning in the context. It should be understood that the terms "comprising", "including" and "having" used herein are intended to specify the existence of the described features, quantities, steps, actions, components, parts or combinations thereof, but it should be understood that they do not exclude the possibility of the existence or addition of one or more other features, quantities, steps, actions, components, parts or combinations thereof.

[0039] Hereinafter, with reference to Figures 1 to 4 a battery pack provided with a BMS according to an embodiment of the present disclosure will be described.

[0040] Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 2 is a top view of the battery pack observed from above Figure 1 thereof. Figure 3 shows Figure 1 Part A of thereof, which is a view showing a state in which holes are formed in the upper cover of the battery pack according to an embodiment of the present disclosure. Figure 4 shows Figure 2 section B-B of thereof, which is a cross-sectional view showing an intermediate portion of the battery pack provided with a reflection wave absorber according to an embodiment of the present disclosure.

[0041] With reference to Figures 1 to 4 , a battery pack according to an embodiment of the present disclosure includes: a plurality of first battery modules 200 and a plurality of second battery modules 300, arranged in two rows along a first direction; and a battery housing 100, accommodating the plurality of first battery modules 200 and the plurality of second battery modules 300, and including a plurality of cross beams 110 that separate between the plurality of first battery modules 200 and between the plurality of second battery modules 300. The plurality of first battery modules 200 and the plurality of second battery modules 300 may be arranged to face each other.

[0042] In addition, the battery pack includes: a first wave path guide 400 formed on the upper part of the plurality of first battery modules 200 and extending along the first direction; and a second wave path guide 500 formed on the upper part of the plurality of second battery modules 300 and extending along the first direction.

[0043] In addition, the battery pack includes: a plurality of first slave BMSs 600, located on a side of the plurality of first battery modules 200 facing the plurality of second battery modules 300 and arranged between the first wave path guide 400 and the second wave path guide 500 along the first direction; and a plurality of second slave BMSs 700, located on a side of the plurality of second battery modules 300 facing the plurality of first battery modules 200 and arranged between the first wave path guide 400 and the second wave path guide 500 along the first direction.

[0044] Referring to Figure 1 , the battery housing 100 houses a plurality of first battery modules 200 and second battery modules 300. The plurality of module areas of the battery housing 100 may be formed to have dimensions corresponding to the dimensions of the first battery modules 200 and the second battery modules 300, respectively. The plurality of first battery modules 200 and second battery modules 300 may be disposed in the plurality of module areas, respectively.

[0045] According to this embodiment, the plurality of first battery modules 200 are arranged in a first direction, and the plurality of second battery modules 300 are arranged in a first direction on the sides of the plurality of first battery modules 200, thereby forming a two-row battery module arrangement structure. At this time, each battery module constituting the plurality of first battery modules 200 may be arranged to be spaced apart from each other to face each battery module constituting the plurality of second battery modules 300.

[0046] Referring to Figure 2 and Figure 4 , a cross beam 110 may be formed between the module areas to separate the battery modules arranged in each module area. The cross beam 110 can protect the plurality of first battery modules 200 and second battery modules 300 from external physical impacts together with the outer wall 120 forming the outer periphery of the battery housing 100.

[0047] A heat conductive resin layer may be formed on the bottom surface of the battery housing 100. The heat conductive resin layer may transfer the heat generated by the plurality of first battery modules 200 and second battery modules 300 arranged in each of the plurality of module areas to the outside of the battery pack.

[0048] According to this embodiment, the first slave BMS 600 may be arranged in each of the plurality of first battery modules 200. More specifically, the first slave BMS 600 may be arranged in a portion facing the plurality of second battery modules 300. The first slave BMS 600 may be arranged in the middle portion of the battery housing 100. That is, the first slave BMS 600 is arranged in a side portion of the plurality of first battery modules 200 in the first direction among the plurality of first battery modules 200 and second battery modules 300, and thus may be arranged across the middle portion of the battery housing 100.

[0049] The second slave BMS 700 can be disposed in each of the plurality of second battery modules 300. More specifically, the second slave BMS 700 can be disposed in a portion facing the plurality of first battery modules 200. The second slave BMS 700 can be disposed in the middle portion of the battery housing 100. That is, the second slave BMS 700 is disposed in a side portion of the plurality of second battery modules 300 along the first direction between the plurality of first battery modules 200, and thus can be disposed across the middle portion of the battery housing 100.

[0050] Viewed from the influence of the arrangement positions of the master BMS and the slave BMS on the wireless transmission characteristics, compared with the case where the slave BMS is located in the outer housing portion of the battery housing, the configuration in which the slave BMS of the present embodiment is located in the middle portion of the battery housing (i.e., located in the space between the battery modules as Figure 1 shown) has an advantage in terms of wireless transmission performance.

[0051] The battery pack according to the present embodiment includes a first wave path guide 400 formed at the upper portion of the plurality of first battery modules 200 and extending in the first direction, and a second wave path guide 500 formed at the upper portion of the plurality of second battery modules 300 and extending in the first direction. At this time, the first slave BMS 600 and the second slave BMS 700 according to the present embodiment can be disposed in the space formed between the first wave path guide 400 and the second wave path guide 500. In addition, the first wave path guide 400 is formed between the battery pack upper cover 130 and the plurality of first battery modules 200, and the second wave path guide 500 can be formed between the battery pack upper cover 130 and the plurality of second battery modules 300.

[0052] The battery pack according to the present embodiment is mainly installed inside an electric vehicle, and the periphery of the battery pack to be installed is made of a metal material. Therefore, the communication performance may deteriorate due to the multipath phenomenon of radio waves reflected by the metal material. Therefore, according to the present embodiment, the first wave path guide 400 and the second wave path guide 500 can be formed to cover the space between the plurality of first battery modules 200 and the plurality of second battery modules 300 where the plurality of first slave BMSs 600 and the second slave BMSs 700 are disposed. Therefore, the wireless transmission signal distribution can be concentrated in the space between the plurality of first battery modules 200 and the plurality of second battery modules 300 formed between the first wave path guide 400 and the second wave path guide 500, thereby improving the wireless transmission performance. In addition, the deterioration that may occur in the communication between the master BMS 800 and the first slave BMS 600 and the second slave BMS 700 can be minimized.

[0053] According to the experimental example, it can be confirmed that in a battery pack having an intermediate arrangement structure between the first slave BMS 600 and the second slave BMS 700 according to the present disclosure and an arrangement structure of the first wave path guide 400 and the second wave path guide 500, the wireless transmission coefficient S21 between S parameters is increased by about 18 dB from -53.78 dB to -35.21 dB, and a stable communication connection structure is constructed as compared with a conventional battery pack structure in which the slave BMS is arranged outside and no wave path guide is installed.

[0054] According to the present embodiment, the battery pack may further include a main BMS 800, and the main BMS 800 is formed between the first wave path guide 400 and the second wave path guide 500 to be spaced apart from the plurality of first battery modules and the second battery modules. The main BMS 800 may communicate with the host system. The main BMS 800 may manage communication with the plurality of first slave BMSs 600 and the second slave BMS 700.

[0055] The first wave path guide 400 and the second wave path guide 500 are formed to extend along a first direction through the plurality of first battery modules 200 and the second battery modules 300 to a position where the main BMS 800 is arranged, and the main BMS 800 is arranged at a position spaced apart from the plurality of first battery modules 200 and the second battery modules 300 along the first direction. At this time, the main BMS 800 may be symmetrically arranged with the plurality of first battery modules 200 and the second battery modules 300.

[0056] Therefore, the main BMS 800 is arranged at a position symmetrically separated from the plurality of first slave BMSs 600 and the second slave BMS 700, so that communication with the slave BMS can be performed in a balanced manner. In addition, the main BMS 800 is arranged together with the first slave BMS 600 and the second slave BMS 700 in the space between the first wave path guide 400 and the second wave path guide 500, thereby minimizing deterioration of communication between the main BMS 800 and the first slave BMS 600 and the second slave BMS 700 and ensuring wireless communication performance.

[0057] According to the present embodiment, an antenna may be formed in the first slave BMS 600 and the second slave BMS 700. The antenna may include a chip antenna. According to the experimental example, when a chip antenna is used for the first slave BMS 600 and the second slave BMS 700 according to the present embodiment, excellent wireless performance 10 dB or more higher than the case of using a pattern antenna can be ensured.

[0058] Referring to Figure 1 , the battery pack according to the present embodiment further includes a battery pack upper cover 130 covering the battery case 100. At this time, the battery pack upper cover 130 may be formed with at least one hole 130a.

[0059] The heat dissipation function of the battery pack can be performed by forming holes 130a in the upper cover 130 of the battery pack. However, noise may be generated during the communication process between the BMSS due to the holes 130a that connect the outside and the inside of the battery pack. When the size of the holes 130a increases, the noise may also increase. Therefore, the number and size of the holes 130a that can appropriately satisfy the heat dissipation performance and the noise performance simultaneously can be applied. According to the experimental example, as a result of studying the wireless transmission characteristics and the noise control performance, in the worst case, for example, when the hole is directly above the antenna of the main BMS or the slave BMS, or when the mobile phone hotspot is near the hole, when the designed aperture is 45 mm or less, the wireless transmission performance can be ensured. When designed to be less than 20 mm, the noise control performance can be ensured. However, even with multiple holes, the same noise control performance can be obtained. Therefore, considering the heat dissipation and the noise performance, a structure in which multiple holes with a small diameter are arranged may be advantageous. Although Figure 1 only one hole 130a is shown in

[0060] Referring to Figure 4 , a battery pack according to an embodiment of the present disclosure includes: a plurality of first reflection wave absorbers 1100 arranged on a side of a plurality of first battery modules 200 facing a plurality of second battery modules 300; and a plurality of second reflection wave absorbers 1200 arranged on a side of a plurality of second battery modules 300 facing a plurality of first battery modules 200.

[0061] According to this embodiment, when forming a wave propagation channel by using the first wave path guide 400 and the second wave path guide 500, the transmission signal is concentrated in the space between the first wave path guide 400 and the second wave path guide 500, and thus a reflected interference wave is generated from the components provided between the first wave path guide 400 and the second wave path guide 500, so the wireless communication performance may be reduced.

[0062] Therefore, according to this embodiment, as Figure 4 shown, a plurality of first reflection wave absorbers 1100 can be arranged for each battery module on one side of the plurality of first battery modules 200, so that the reflected interference waves that may be generated from the components provided between the first wave path guide 400 and the second wave path guide 500 can be absorbed, and an environment where the wireless communication is not interfered by the reflected interference waves can be created.

[0063] Figure 4 only the configuration of the plurality of first reflection wave absorbers 1100 arranged on one side of the plurality of first battery modules 200 is shown in Figure 4The multiple first battery modules 200 shown are arranged in a similar manner. Accordingly, the multiple second reflection wave absorbers 1200 are also provided on one side of the multiple second battery modules 300, and the multiple first reflection wave absorbers 1100 and the multiple second reflection wave absorbers 1200 can be arranged symmetrically with respect to each other.

[0064] According to the present embodiment, the multiple first reflection wave absorbers 1100 can be arranged below the first wave path guide 400 and the first slave BMS 600 so as to be spaced apart from the first wave path guide 400 and the first slave BMS 600. The multiple second reflection wave absorbers 1200 can be arranged below the second wave path guide 500 and the second slave BMS 700 so as to be spaced apart from the second wave path guide 500 and the second slave BMS 700.

[0065] At this time, the multiple first reflection wave absorbers 1100 can be arranged to correspond to the multiple first slave BMSs 600 below the multiple first slave BMSs 600. In addition, the multiple second reflection wave absorbers 1200 can be arranged to correspond to the multiple second slave BMSs 700 below the multiple second slave BMSs 700.

[0066] In this way, the first reflection wave absorber 1100 and the second reflection wave absorber 1200 are arranged at positions spaced apart from the first slave BMS 600 and the second slave BMS 700, and thus, can be installed at positions that do not affect the wireless communication functions of the first slave BMS 600 and the second slave BMS 700. The first reflection wave absorber 1100 and the second reflection wave absorber 1200 are provided inside the battery pack together with the first wave path guide 400 and the second wave path guide 500, so that in a state where the transmission path has directivity through the first wave path guide 400 and the second wave path guide 500, the propagation of reflection interference can be eliminated by the first reflection wave absorber 1100 and the second reflection wave absorber 1200, and thus, the wireless transmission performance of the battery pack according to the present embodiment can be maximized.

[0067] Figure 5 shows Figure 2 Part D of which is a diagram showing the interval between the slave BMSs according to an embodiment of the present disclosure.

[0068] According to the present embodiment, as Figure 5 shown, the multiple first slave BMSs 600 and the multiple second slave BMSs 700 can be formed to be spaced apart from each other to have a gap G1. More specifically, the multiple first slave BMSs 600 arranged in the multiple first battery modules 200 and the multiple second slave BMSs 700 arranged in the multiple second battery modules 300 can be formed to be spaced apart from each other.

[0069] According to this embodiment, the separation distance between the first slave BMS 600 and the second slave BMS 700 can be formed to be 50 mm. In the prior art, the distance between two battery modules arranged in two rows is as narrow as 30 mm, but in this embodiment, the distance between the two battery modules is increased to 50 mm, thereby increasing the wireless transmission space and thus improving the wireless transmission performance.

[0070] Figure 6 shows Figure 4 Part C of, which is a view showing the height of the outer wall of the battery housing according to an embodiment of the present disclosure.

[0071] Referring to Figure 6 , a battery pack according to an embodiment of the present disclosure can be configured such that the upper end of the outer wall 120 of the battery housing 100 is coupled to the battery pack upper cover 130, and the battery pack upper cover 130 can be formed to be spaced apart from the plurality of first battery modules 600 and second battery modules 700.

[0072] According to this embodiment, the height H2 of the outer wall 120 can be formed to be 138 mm. In the prior art, the height of the outer wall is formed to be 128 mm, but according to this embodiment, by making the height H2 of the outer wall 120 higher than the height of the conventional outer wall, the wireless transmission performance can be improved. In other words, since the height H2 of the outer wall 120 is increased, the wireless transmission performance can be further improved.

[0073] Figure 6 Only the part formed with the plurality of first slave BMSs 600 and the first wave path guides 400 is shown. However, the part formed with the plurality of second slave BMSs 700 and the second wave path guides 500 on the opposite side can be arranged in a manner similar to the configuration as Figure 6 shown.

[0074] Figure 7 shows Figure 4 Part C of, which is a view showing the height of the cross beam of the battery housing according to an embodiment of the present disclosure.

[0075] Referring to Figure 3 and Figure 7 , a battery pack according to an embodiment of the present disclosure can include: a plurality of first bus bars 910 arranged to span between two adjacent battery modules among the plurality of first battery modules 200; and a plurality of second bus bars 920 arranged to span between two adjacent battery modules among the plurality of second battery modules 300. At this time, the cross beam 110 can be formed to be spaced apart from the plurality of first bus bars 910 and second bus bars 920 respectively below the plurality of first bus bars 910 and second bus bars 920.

[0076] According to this embodiment, the height of the cross beam 110 can be formed to be 70 mm. The height of the conventional cross beam 110 is formed to be about 90 mm, but according to this embodiment, the height H3 of the cross beam 110 can be lower than that of the conventional cross beam 110, thereby improving the wireless transmission performance. In other words, since the height H3 of the cross beam 110 is reduced, the wireless transmission performance can be further improved.

[0077] Figure 7 Only the part where a plurality of first slave BMSs 600 and first wave path guides 400 are formed is shown. However, the part where a plurality of second slave BMSs 700 and second wave path guides 500 are formed on the opposite side can be configured in a manner similar to Figure 6 the configuration shown.

[0078] The above battery pack can be applied to various devices. Such devices can be applied to vehicle devices such as electric bicycles, electric vehicles, or hybrid vehicles, but the present disclosure is not limited thereto and is applicable to various devices that can use battery modules falling within the scope of the present disclosure.

[0079] Although the present invention has been shown and described above with reference to preferred embodiments, the scope of the present disclosure is not limited thereto. Those skilled in the art can design many other modifications and embodiments that will fall within the spirit and scope of the principles of the present invention described in the appended claims. In addition, these modified embodiments should not be understood independently of the technical spirit or concept of the present disclosure.

[0080]

Explanation of Reference Numerals

[0081] 100: Battery housing

[0082] 110: Cross beam

[0083] 120: Outer wall

[0084] 130: Battery pack upper cover

[0085] 130a: Hole

[0086] 200: First battery module

[0087] 300: Second battery module

[0088] 400: First wave path guide

[0089] 500: Second wave path guide

[0090] 600: First slave BMS

[0091] 700: Second slave BMS

[0092] 800: Main BMS

[0093] 910: First bus bar

[0094] 920: Second bus bar

[0095] 1100: First reflected wave absorber

[0096] 1200: Second reflected wave absorber

Claims

1. A battery pack, comprising: A plurality of first battery modules and a plurality of second battery modules, arranged in two rows along a first direction; A battery housing, accommodating the plurality of first battery modules and the plurality of second battery modules, and including a plurality of cross beams for separating between the plurality of first battery modules and between the plurality of second battery modules; A plurality of first slave BMSs, located on a side of the plurality of first battery modules facing the plurality of second battery modules and arranged along the first direction; A plurality of second slave BMSs, located on a side of the plurality of second battery modules facing the plurality of first battery modules and arranged along the first direction; A plurality of first reflection wave absorbers, arranged on a side of the plurality of first battery modules facing the plurality of second battery modules; A plurality of second reflection wave absorbers, arranged on a side of the plurality of second battery modules facing the plurality of first battery modules; A first wave path guide, formed on an upper part of the plurality of first battery modules and extending along the first direction; And A second wave path guide, formed on an upper part of the plurality of second battery modules and extending along the first direction, Wherein, a wave propagation channel is formed between the first wave path guide and the second wave path guide.

2. The battery pack according to claim 1, wherein, The plurality of first slave BMSs and the plurality of first slave BMSs are respectively arranged between the first wave path guide and the second wave path guide along the first direction.

3. The battery pack according to claim 2, wherein, The plurality of first reflection wave absorbers are arranged below the first wave path guide and the first slave BMSs and spaced apart from the first wave path guide and the first slave BMSs, and The plurality of second reflection wave absorbers are arranged below the second wave path guide and the second slave BMSs and spaced apart from the second wave path guide and the second slave BMSs.

4. The battery pack according to claim 1, further comprising a main BMS, the main BMS being formed between the first wave path guide and the second wave path guide and spaced apart from the plurality of first battery modules and the plurality of second battery modules.

5. The battery pack according to claim 4, wherein, The first wave path guide and the second wave path guide are formed to extend along the first direction so as to pass through the plurality of first battery modules and the plurality of second battery modules, and The main BMS is arranged along the first direction at a position spaced apart from the plurality of first battery modules and the plurality of second battery modules.

6. The battery pack according to claim 4, wherein, The plurality of first reflection wave absorbers are arranged to correspond to the plurality of first slave BMSs below the plurality of first slave BMSs, and The plurality of second reflection wave absorbers are arranged to correspond to the plurality of second slave BMSs below the plurality of second slave BMSs.

7. The battery pack according to claim 1, wherein, The first wave path guide is formed between the battery pack upper cover and the plurality of first battery modules, and The second wave path guide is formed between the battery pack upper cover and the plurality of second battery modules.

8. The battery pack according to claim 1, wherein, Antennas are formed in the first slave BMS and the second slave BMS.

9. The battery pack according to claim 1, further comprising a battery pack upper cover, the battery pack upper cover covering an upper surface of the battery housing, Among them, At least one hole is formed in the battery pack upper cover.

10. The battery pack according to claim 1 further comprises: a plurality of first busbars arranged to span between two adjacent ones of the plurality of first battery modules; and a plurality of second busbars arranged to span between two adjacent ones of the plurality of second battery modules.

11. An apparatus comprising the battery pack according to claim 1.

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