Battery system with identical wireless communication performance

Abstract

The present invention relates to a battery system with identical wireless communication performance. A battery system that performs wireless communication by a frequency hopping method, according to an embodiment of the present invention, may comprise: a plurality of battery modules; a single antenna; a plurality of slave BMSs which are connected to the plurality of battery modules, respectively, generate a plurality of pieces of battery information by sensing states of the plurality of battery modules, and provide, to the single antenna, a plurality of sensing signals respectively including the plurality of pieces of battery information; and a master BMS which is connected to an antenna, receives, through the antenna, the plurality of sensing signals transmitted through the single antenna, acquires the plurality of pieces of battery information according to the plurality of sensing signals, generates, by using the plurality of acquired pieces of battery information, a plurality of control signals that control the plurality of battery modules, and transmits the plurality of control signals to the single antenna through the antenna.

Description

Battery systems with identical wireless communication performance

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0043438, filed March 29, 2024, the entire contents of which are incorporated herein by reference.

[0003] The present invention relates to a battery system having the same wireless communication performance.

[0004] In a 1:many wireless communication environment between a master BMS and multiple slave BMSs using a frequency hopping method, individual antennas are connected to each node of the multiple slave BMSs, and each of the multiple nodes performs wireless communication with the master BMS using an individual antenna. Since multiple distances between multiple nodes of the multiple slave BMSs and the master BMS inside the battery pack are different from each other, a wireless communication performance deviation occurs in which the wireless communication performances of the multiple nodes are different from each other.

[0005] Additionally, multiple nodes of multiple slave BMSs are affected by different structures depending on their installation locations. Consequently, the resonant frequency of individual antennas connected to each node may be altered by structures at each node's installation location. Consequently, frequency hopping causes additional wireless performance deviations due to resonant frequency changes in the frequency hopping channels assigned to each node.

[0006] The present invention aims to provide a battery system in which the wireless communication performance between a plurality of slave BMSs and a master BMS is the same by integrating the antennas of a plurality of slave BMSs.

[0007] A battery system for performing wireless communication using a frequency hopping method according to one embodiment of the present invention may include a plurality of battery modules, a single antenna, a plurality of slave BMSs each connected to the plurality of battery modules, each sensing a state of the plurality of battery modules to generate a plurality of battery information, and providing a plurality of sensing signals each including the plurality of battery information to the single antenna, and a master BMS connected to the antenna, receiving the plurality of sensing signals transmitted through the single antenna through the antenna, obtaining the plurality of battery information according to the plurality of sensing signals, and generating a plurality of control signals for controlling the plurality of battery modules using the obtained plurality of battery information, and transmitting the generated plurality of control signals to the single antenna through the antenna.

[0008] The above plurality of battery information may include an information identifier indicating a slave BMS that generated specific battery information among the plurality of slave BMSs.

[0009] The plurality of control signals may include operation information for controlling the operation of at least one battery module among the plurality of battery modules.

[0010] The above operation information may include a command identifier indicating a specific slave BMS among the plurality of slave BMSs.

[0011] The above master BMS can perform wireless communication with the plurality of slave BMSs using a frequency hopping method that uses the ISM (Industrial Scientific Medical) band as a frequency band.

[0012] The above master BMS can perform wireless communication by designating a specific frequency band, selecting multiple hopping channels in the specific frequency band, and generating an arbitrary pattern using the selected hopping channels.

[0013] It may include a substrate on which the plurality of slave BMSs and the single antenna are arranged, a housing in which the plurality of battery modules and the substrate are housed inside, and the master BMS is arranged on one surface.

[0014] The plurality of slave BMSs may include an integrated distributor that receives the plurality of sensing signals, integrates the received plurality of sensing signals, and transmits the integrated plurality of sensing signals through the single antenna, and a plurality of connecting units that wiredly connect each node of the plurality of slave BMSs to the integrated distributor.

[0015] The above integrated distributor can recognize the command identifier of the control signal received from the master BMS and transmit the control signal to a specific slave BMS among the plurality of slave BMSs.

[0016] The above integrated distributor can transmit a control signal received from the master BMS to each of the plurality of slave BMSs through the plurality of connecting units.

[0017] The above plurality of connecting parts may be connected at one end to each node of the plurality of slave BMSs, and at the other end to the integrated distributor.

[0018] The above plurality of connecting portions may be of the same length.

[0019] The above may include a housing in which the plurality of slave BMSs, the single antenna, the integrated distributor, and the plurality of connection portions are arranged, and the plurality of battery modules and the substrate are housed therein, and the master BMS is arranged on one surface.

[0020] According to one embodiment of the present invention, it is possible to secure stable and identical wireless communication performance by improving the deviation between the performances of wireless communication due to the distance difference or structural influence between a plurality of slave BMSs and a master BMS.

[0021] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description below.

[0022] FIG. 1 is a block diagram of a battery system according to one embodiment of the present invention.

[0023] FIG. 2 is a block diagram of a battery system according to another embodiment of the present invention.

[0024] FIG. 3 is a schematic diagram illustrating an example of a battery system according to one embodiment of the present invention.

[0025] FIG. 4 is a schematic diagram illustrating an example of a battery system according to another embodiment of the present invention.

[0026] FIG. 5 is a schematic diagram of a battery system in which each of a plurality of slave BMSs is connected to an individual antenna as a comparative example.

[0027] FIG. 6 is a schematic diagram illustrating an example of a battery system according to another embodiment of the present invention.

[0028] FIG. 7 is a drawing showing an implementation example of a battery system according to another embodiment of the present invention.

[0029] Figure 8 is a drawing showing each component of the implementation example of Figure 7 in a separated form.

[0030] Fig. 9 is a drawing showing the embodiment of Fig. 7 cut along line A-A'.

[0031] In describing the embodiments disclosed in this specification, detailed descriptions of related known technologies will be omitted if it is determined that such detailed descriptions may obscure the gist of the embodiments disclosed in this specification. In addition, the attached drawings are provided solely to facilitate understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included within the spirit and technical scope of the present invention.

[0032] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0033] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0034] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0035] The present invention will be described in detail with reference to the attached drawings below.

[0036] FIG. 1 is a block diagram of a battery system according to one embodiment of the present invention.

[0037] Referring to FIG. 1, a battery system (2) according to one embodiment of the present invention includes a battery (10), a relay (20), and a battery management system (hereinafter referred to as 'BMS') (30).

[0038] In Fig. 1, a battery (10) is connected between two output terminals (OUT1, OUT2) of a battery system (2). A relay (20) may be connected between the positive electrode of the battery system (2) and the first output terminal (OUT1), and a current sensor (not shown) may be connected between the negative electrode of the battery system and the second output terminal (OUT2). In the present disclosure, the potential of the positive electrode is higher than the potential of the negative electrode.

[0039] The battery (10) may include a plurality of battery modules (100-1, 100-2 to 100-N) connected in series and in parallel. Each of the plurality of battery modules (100-1, 100-2 to 100-N) may include a plurality of battery cells that are electrically connected in series and in parallel. In one embodiment, the battery cells may be rechargeable secondary batteries. In FIG. 1, the plurality of battery modules (100-1, 100-2 to 100-N) are connected in series, and each of the plurality of battery modules (100-1, 100-2 to 100-N) is illustrated as including a plurality of battery cells that are connected in series, but is not limited thereto, and the plurality of battery modules (100-1, 100-2 to 100-N) and the plurality of battery cells may be configured to be connected in series and / or in parallel.

[0040] The relay (20) acts as a kind of switch that controls the electrical connection between the battery system (2) and the external device (1). When the relay (20) is turned on, the battery system (2) and the external device (1) are electrically connected to perform charging or discharging. When the relay (20) is turned off, the battery system (2) and the external device (1) are electrically separated. At this time, the external device (1) may be a charger in a charging cycle in which it supplies power to the battery (10) to charge it, and may be a load in a discharging cycle in which the battery (10) discharges power to the external device (1).

[0041] The BMS (30) may include a plurality of slave BMSs (200-1, 200-2 to 200-N) and a master BMS (300). The BMS (30) may include at least one slave BMS (200-1 to N) and a master BMS (300).

[0042] A plurality of slave BMSs (200-1, 200-2 to 200-N) and a master BMS (300) can transmit and receive signals using a wireless communication method. For example, each of the plurality of slave BMSs (200-1, 200-2 to 200-N) can transmit each of a plurality of sensing signals generated by measuring the status of a plurality of battery modules (100-1, 100-2 to 100-N) to the master BMS (300). In addition, the master BMS (300) can generate a control signal based on the sensing signal and transmit the control signal to each of the plurality of slave BMSs (200-1, 200-2 to 200-N).

[0043] According to an embodiment, a plurality of slave BMSs (200-1, 200-2 to 200-N) and a master BMS (300) can communicate by a wireless communication method according to a frequency hopping method. Here, the frequency hopping method is a communication method that divides a specific frequency band into frequency bands having a predetermined size, provides a plurality of channels with different frequency bands, and transmits divided data while changing the channel to transmit the signal. Signal interference between the battery system (2) and other communication devices using the same frequency band as the battery system (2) is reduced by the frequency hopping method, thereby preventing deterioration of communication quality.

[0044] In some embodiments, the frequency band used in the frequency hopping method may include an Industrial, Scientific, and Medical (ISM) band. Here, the ISM band refers to a frequency band allocated for industrial, scientific, and medical purposes and can be used without separate use licenses. Common ISM bands are established worldwide in the 900 MHz, 2.4 GHz, and 5.7 GHz bands. For example, Bluetooth and Zigbee use one frequency band (2.4 GHz), while Wi-Fi uses two frequency bands (2.4 GHz and 5 GHz).

[0045] A plurality of slave BMSs (200-1, 200-2 to 200-N) are respectively connected to a plurality of battery modules (100-1, 100-2 to 100-N), and can sense the status of each of the plurality of battery modules (100-1, 100-2 to 100-N) to generate a plurality of battery information.

[0046] Here, battery information refers to information sensed by a specific slave BMS regarding the status of a specific battery module. Depending on the embodiment, battery information may include information measured by the slave BMS (e.g., cell current, cell voltage, cell temperature, etc.) and estimated information (e.g., State of Charge (SOC), State of Health (SOH)).

[0047] In some embodiments, the battery information may include an information identifier indicating a slave BMS among multiple slave BMSs (200-1, 200-2 to 200-N) that generated the corresponding battery information.

[0048] A plurality of slave BMSs (200-1, 200-2 to 200-N) can generate a plurality of sensing signals each including a plurality of battery information, and can transmit the generated plurality of sensing signals to the master BMS (300) through a single antenna (410). Here, the single antenna (410) means a configuration that can transmit a plurality of sensing signals generated by the plurality of slave BMSs (200-1, 200-2 to 200-N) to the master BMS (300) simultaneously or at time intervals.

[0049] That is, the battery system according to one embodiment of the present invention can perform wireless communication with the master BMS (300) through a single antenna (410) connected to each node of the plurality of slave BMSs (200-1, 200-2 to 200-N) when performing multi-to-one wireless communication between the plurality of slave BMSs (200-1, 200-2 to 200-N) and the master BMS (300).

[0050] The master BMS (300) can receive multiple sensing signals transmitted from each of multiple slave BMSs (200-1, 200-2 to 200-N) to obtain battery information for each of multiple battery modules (100-1, 100-2 to 100-N), and can generate a control signal based on the obtained battery information. At this time, the generated control signal can be transmitted through an antenna (310) connected to a node of the master BMS (300).

[0051] Here, the control signal refers to a signal for controlling the operation of each of the plurality of battery modules (100-1, 100-2 to 100-N), and may include operation information for each of the plurality of battery modules (100-1, 100-2 to 100-N). Depending on the embodiment, the control signal may include at least one or more pieces of operation information.

[0052] Here, the operation information refers to information necessary to control the operation of a specific battery module among the plurality of battery modules (100-1, 100-2 to 100-N). Depending on the embodiment, the operation information may include information necessary to perform the corresponding operation along with commands instructing the SOC, SOH, power limit, cell balancing, fault diagnosis, cooling control, etc. of each of the plurality of battery modules (100-1, 100-2 to 100-N).

[0053] Depending on the embodiment, the operation information may include a command identifier. Here, the command identifier means an identifier indicating that the operation information is operation information for a slave BMS among a plurality of slave BMSs (200-1, 200-2 to 200-N).

[0054] According to an embodiment, a master BMS (300) can generate a frequency hopping code (Frequency Hopping Sequence) and wirelessly communicate with a plurality of slave BMSs (200-1, 200-2 to 200-N) according to the frequency hopping code.

[0055] For example, the master BMS (300) may designate the ISM band as a frequency band used for wireless communication, select multiple hopping channels to be used for a frequency hopping method among multiple channels (CH_1-CH_N) existing in the ISM band, and generate a frequency hopping code using the multiple selected hopping channels. Here, the hopping code means an arbitrary pattern formed using the selected hopping channel.

[0056] For example, if the ISM band is divided into 10 channels from the first channel (CH_1) to the tenth channel (CH_10), the master BMS (300) can select the first channel (CH_1), the third channel (CH_3), and the eighth channel (CH_8) as hopping channels. In addition, the master BMS (300) can divide and transmit data by changing the channels in the order of the first channel (CH_1), the third channel (CH_3), the first channel (CH_1), the eighth channel (CH_8), and the third channel (CH_3) using the selected hopping channels, that is, the first channel (CH_1), the third channel (CH_3), and the eighth channel (CH_8). At this time, the order of the channels used to transmit the data forms a random pattern, which is called a hopping code. That is, the master BMS (300) can reduce or solve the problem of signal interference by dividing and transmitting data while changing the channel according to the frequency hopping method.

[0057] A control signal received through a single antenna (410) is provided to a plurality of slave BMSs (200-1, 200-2 to 200-N), and each of the plurality of slave BMSs (200-1, 200-2 to 200-N) can determine whether to operate according to the operation information based on the command identifier of the control signal. At this time, among the plurality of slave BMSs (200-1, 200-2 to 200-N), the slave BMS indicated by the command identifier can operate according to the operation information of the control signal.

[0058] According to an embodiment, the battery system (2) may include a substrate and a housing for arranging and accommodating components. For example, a plurality of slave BMSs (200-1, 200-2 to 200-N) and a single antenna (410) may be arranged on a substrate (not shown in the drawing) made of an insulator. In addition, a plurality of battery modules (100-1, 100-2 to 100-N) may be accommodated inside a housing (not shown in the drawing) together with the substrate, and the master BMS (300) may be arranged on one surface of the housing. At this time, the single antenna (410) may be implemented in a chip form and arranged on a portion of the substrate, and may be respectively connected to a plurality of slave BMSs (200-1 to 200-6) on the substrate.

[0059] FIG. 2 is a block diagram of a battery system according to another embodiment of the present invention.

[0060] Referring to FIG. 2, a battery system according to another embodiment of the present invention may further include a plurality of connection parts (430-1, 430-2 to 430-N) and an integrated distributor (420). At this time, a single antenna (410) is not directly connected to each node of a plurality of slave BMSs (200-1, 200-2 to 200-N), but is connected to a plurality of slave BMSs (200-1, 200-2 to 200-N) through the integrated distributor (420) and a plurality of connection parts (430-1, 430-2 to 430-N). However, the configurations and connection relationships between the configurations illustrated in FIG. 2 are merely examples, and the present invention is not limited thereto.

[0061] A plurality of connecting portions (430-1, 430-2 to 430-N) wiredly connect the nodes of each of the plurality of slave BMSs (200-1, 200-2 to 200-N) to the integrated distributor (420). One end of each of the plurality of connecting portions (430-1, 430-2 to 430-N) is connected to a node of each of the plurality of slave BMSs (200-1, 200-2 to 200-N), and the other end of each of the plurality of connecting portions (430-1, 430-2 to 430-N) is connected to the integrated distributor (420). Depending on the embodiment, the plurality of connecting portions (430-1, 430-2 to 430-N) may have the same length.

[0062] As illustrated in FIG. 2, a plurality of slave BMSs (200-1, 200-2 to 200-N) and an integrated distributor (420) are arranged at different locations within the battery system (2). At this time, the length of each of the plurality of connecting portions (430-1, 430-2 to 430-N) can be determined by the distance from each of the plurality of slave BMSs (200-1, 200-2 to 200-N) to the integrated distributor (420). That is, the plurality of connecting portions (430-1, 430-2 to 430-N) have length differences from each other. A time difference may occur between the times required for multiple sensing signals generated from multiple slave BMSs (200-1, 200-2 to 200-N) to reach the integrated distributor (420) due to a difference in length between multiple connecting portions (430-1, 430-2 to 430-N).

[0063] This time difference may be negligible. However, in order to resolve this time difference, the lengths of the plurality of connectors (430-1, 430-2 to 430-N) may be implemented to be the same. This will further reduce the wireless communication performance deviation between each of the plurality of slave BMSs (200-1, 200-2 to 200-N) and the master BMS (300). When the plurality of connectors (430-1, 430-2 to 430-N) have the same length, depending on the positions where the plurality of slave BMSs (200-1, 200-2 to 200-N) and the integrated distributor (420) are arranged, there may be a connector among the plurality of connectors (430-1, 430-2 to 430-N) implemented with a folding or rolling structure.

[0064] According to an embodiment, the plurality of connecting portions (430-1, 430-2 to 430-N) may be RF coaxial cables. However, the types of the plurality of connecting portions (430-1, 430-2 to 430-N) are not limited thereto, and any configuration that can connect each of the plurality of slave BMSs (200-1, 200-2 to 200-N) to the integrated distributor (420) may be adopted.

[0065] The integrated distributor (420) receives a plurality of sensing signals from a plurality of slave BMSs (200-1, 200-2 to 200-N), integrates the received plurality of sensing signals, and transmits the integrated plurality of sensing signals through a single antenna (410). In addition, the integrated distributor (420) can recognize a command identifier of a control signal received from a master BMS (300) and transmit the received control signal to a specific slave BMS among the plurality of slave BMSs (200-1, 200-2 to 200-N). When the integrated distributor (420) does not recognize the command identifier, the integrated distributor (420) can transmit the control signal to each of the plurality of slave BMSs (200-1, 200-2 to 200-N) through a plurality of connection portions (430-1, 430-2 to 430-N). In some embodiments, the integrated distributor (420) may be an N-Way Splitter. In this case, each of the plurality of slave BMSs (200-1, 200-2 to 200-N) may determine whether to operate based on the operation information according to the command identifier of the control signal.

[0066] At this time, an identifier may be displayed on the battery information and operation information included in each of the sensing signal and the control signal. Depending on the embodiment, the identifier may be for indicating that it was generated by a specific slave BMS among the plurality of slave BMSs (200-1, 200-2 to 200-N), or may be for transmitting it to a specific slave BMS among the plurality of slave BMSs (200-1, 200-2 to 200-N).

[0067] When wireless communication is performed between a master BMS (300) and multiple slave BMSs (200-1, 200-2 to 200-N) by the frequency hopping method, interference between signals does not occur even if multiple sensing signals are integrated in the integrated distributor (420). On the other hand, when the master BMS (300) and multiple slave BMSs (200-1, 200-2 to 200-N) do not perform wireless communication by the frequency hopping method, it is necessary to control communication between the master BMS (300) and multiple slave BMSs (200-1, 200-2 to 200-N) by setting the frequency bands of the multiple sensing signals to be different from each other or setting the transmission times of the multiple sensing signals to be different from each other so that interference does not occur between the signals integrated in the integrated distributor (420).

[0068] FIG. 3 is a schematic diagram illustrating an example of a battery system according to one embodiment of the present invention.

[0069] Referring to FIG. 3, in a battery system (2) according to one embodiment of the present invention, each node of a plurality of slave BMSs (200-1, 200-2 to 200-6) is all connected to a single antenna (410). That is, the plurality of slave BMSs (200-1, 200-2 to 200-6) perform wireless communication with the master BMS (300) through the single antenna (410). Accordingly, a plurality of sensing signals generated from the plurality of slave BMSs (200-1, 200-2 to 200-6) are all transmitted to the master BMS (300) at the same time. Accordingly, it is possible to prevent occurrence of wireless communication performance deviations due to deviations between a plurality of distances between a plurality of nodes of the plurality of slave BMSs (200-1, 200-2 to 200-6) and the master BMS (300).

[0070] FIG. 4 is a schematic diagram illustrating an example of a battery system according to another embodiment of the present invention.

[0071] Referring to FIG. 4, another battery system (2) of the present invention is such that each node of a plurality of slave BMSs (200-1, 200-2 to 200-6) is all connected to an integrated distributor by a plurality of connectors (430-1, 430-2 to 430-6). The plurality of slave BMSs (200-1, 200-2 to 200-6) perform wireless communication with a master BMS (300) through a single antenna (410). Accordingly, a plurality of sensing signals generated from the plurality of slave BMSs (200-1, 200-2 to 200-6) are all transmitted to the master BMS (300) at the same time. Accordingly, it is possible to prevent occurrence of wireless communication performance deviations due to deviations between multiple nodes of multiple slave BMSs (200-1, 200-2 to 200-6) and multiple distances between the master BMS (300).

[0072] FIG. 5 is a schematic diagram of a battery system in which each of a plurality of slave BMSs is connected to an individual antenna as a comparative example.

[0073] As illustrated in Fig. 5, a battery system may have a specific structure between multiple slave BMSs and a master BMS depending on the design specifications. In this case, the battery system is affected by different structures depending on where the multiple slave BMSs are installed within the battery system. Accordingly, the resonant frequencies of the antennas individually connected to each slave BMS are set to different frequencies. In particular, when performing wireless communication using a frequency hopping method, irregular wireless performance deviations additionally occur due to different resonant frequencies for the frequency hopping channels assigned to each slave BMS.

[0074] FIG. 6 is a schematic diagram illustrating an example of a battery system according to another embodiment of the present invention.

[0075] Referring to FIG. 6, a battery system (2) according to one embodiment of the present invention has a plurality of slave BMSs (200-1, 200-2 to 200-6) perform wireless communication with a master BMS (300) through a single antenna (410). Therefore, even if the plurality of slave BMSs (200-1, 200-2 to 200-6) are installed at different locations within the battery system (2), the structure has the same effect on wireless communication between the plurality of slave BMSs (200-1, 200-2 to 200-N) and the master BMS (300), and thus no performance deviation in wireless communication due to the structure effect occurs.

[0076] FIG. 7 is a drawing showing an implementation example of a battery system according to another embodiment of the present invention, FIG. 8 is a drawing showing each component of the implementation example of FIG. 7 in a separated state, and FIG. 9 is a drawing showing the implementation example of FIG. 7 cut along line A-A'.

[0077] Referring to FIGS. 7 to 9, a battery system (2) according to another embodiment of the present invention may be implemented in a form in which a battery (10), a relay (20), and a battery management system (30) are accommodated inside a housing (40) or placed in the housing (40).

[0078] For example, as illustrated in FIGS. 7 to 9, the battery system (2) may be implemented in a form in which a master BMS (300) is placed in a portion of a housing (40), and a plurality of battery modules (100-1 to 100-6) and a plurality of slave BMSs (200-1 to 200-6) are accommodated inside the housing (40). At this time, the antenna (310) connected to the master BMS (300) may be implemented in the form of a chip built into the master BMS (300).

[0079] Although FIGS. 7 to 9 illustrate that six battery modules (100-1 to 100-6) and six slave BMSs (200-1 to 200-6) are housed inside the housing (40), the number of battery modules and slave BMSs is not limited thereto and may be freely changed as needed.

[0080] Although FIG. 7 illustrates that the master BMS (300) is installed and built into the interior of the upper surface of the housing (40), the position at which the master BMS (300) is placed with respect to the housing (40) is not limited thereto and may be freely changed as needed. For example, the master BMS (300) may be placed on the inner or outer surface of the housing (40). In this case, the master BMS (300) may be placed on the outer surface facing the single antenna (410) among the outer surfaces included in the housing (40). Alternatively, the master BMS (300) may be placed on the outside of the housing (40). Alternatively, the master BMS (300) may be placed on the outer or inner surface of the housing (40).

[0081] The housing (40) may be composed of an insulator and, as illustrated in Fig. 7, may be implemented as a rectangular parallelepiped case with a hollow interior. However, the shape and size of the housing (40) are not limited thereto and may be freely changed as needed.

[0082] According to an embodiment, the housing (40) may include a plurality of spaces (not shown in the drawing) for separately storing a plurality of battery modules (100-1 to 100-6), and at this time, the plurality of spaces inside the housing (40) may be formed through a partition wall (not shown in the drawing).

[0083] According to an embodiment, as illustrated in FIGS. 8 and 9, a plurality of slave BMSs (200-1 to 200-6) may be implemented in a form installed on a substrate (41). At this time, the substrate (41) may be placed on the upper surface of a plurality of battery modules (100-1 to 100-6) housed inside a housing (40) and may be composed of an insulator.

[0084] Each of the plurality of slave BMSs (200-1 to 200-6) installed on the substrate (41) is arranged to correspond to each of the plurality of battery modules (100-1 to 100-6) and is electrically connected to the plurality of battery modules (100-1 to 100-6).

[0085] Although FIG. 8 illustrates that there is one substrate (41), the number of substrates (41) is not limited thereto and may be freely modified as needed. For example, the number of substrates (41) may be the same as the number of slave BMSs (200-1 to 200-6), i.e., a plurality of substrates may be implemented, and a plurality of slave BMSs (200-1 to 200-6) may be arranged on each of the plurality of substrates (41).

[0086] According to an embodiment, a substrate (41) on which a plurality of slave BMSs (200-1 to 200-6) are installed may also be configured with an integrated distributor (420) and a plurality of connection portions (430-1 to 430-6). At this time, the integrated distributor (420) may be arranged in a portion of the substrate (41) where the plurality of slave BMSs (200-1 to 200-6) are not arranged, and is connected to the wireless ports of the plurality of slave BMSs (100-2 to 200-6) through the plurality of connection portions (430-1 to 430-6). At this time, the single antenna (410) may be implemented in the form of a chip built into the substrate (41) or the integrated distributor (420).

[0087] Although FIG. 8 illustrates that the integrated distributor (420) and the single antenna (410) are arranged on the same substrate as the plurality of slave BMSs (200-1 to 200-6), the shape of the substrate (41) on which the integrated distributor (420), the single antenna (410) and the plurality of slave BMSs (200-1 to 200-6) are arranged is not limited thereto and may be freely modified as needed. For example, the substrate (41) may be implemented in multiple pieces, and the integrated distributor (420), the single antenna (410) and the plurality of slave BMSs (200-1 to 200-6) may be arranged on each of the plurality of substrates (41). That is, the integrated distributor (420), the single antenna (410) and the plurality of slave BMSs (200-1 to 200-6) may be arranged on different substrates, respectively.

[0088] According to an embodiment, each of the plurality of slave BMSs (200-1 to 200-6) may be respectively disposed in each of the plurality of battery modules (100-1 to 100-6). At this time, the single antenna (410) may be disposed in any one of the plurality of battery modules (100-1 to 100-6). According to an embodiment, the battery module in which the single antenna (410) is disposed may be located in the middle of the plurality of battery modules (100-1 to 100-6).

[0089] For convenience of explanation, FIGS. 8 and 9 show exaggerated representations of components of a battery system (2) according to one embodiment of the present invention.

[0090] For example, although FIG. 8 illustrates that there is an empty space between a plurality of battery modules (100-1 to 100-6) housed inside a housing (40), this is an exaggerated expression for convenience of explanation, and the present invention is not limited thereto and may be freely changed as needed. For example, the empty space between the plurality of battery modules (100-1 to 100-6) may be filled with a specific structure, or the plurality of battery modules (100-1 to 100-6) may be housed inside the housing (40) so that there is no empty space between them.

[0091] In addition, although FIG. 9 depicts an empty space between the upper surface of the housing (40) and the substrate (41), this is an exaggerated representation for convenience of explanation, and the present invention is not limited thereto and may be freely changed as needed.

[0092] The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

Claims

1. In a battery system performing wireless communication, Multiple battery modules; single antenna; A plurality of slave BMSs, each connected to the plurality of battery modules, senses the status of the plurality of battery modules to generate a plurality of battery information, and provides a plurality of sensing signals each including the plurality of battery information to the single antenna; and A master BMS is included that is connected to an antenna, receives the plurality of sensing signals transmitted through the single antenna through the antenna, acquires the plurality of battery information according to the plurality of sensing signals, and generates a plurality of control signals for controlling the plurality of battery modules using the acquired plurality of battery information and transmits the control signals to the single antenna through the antenna. Battery system.

2. In paragraph 1, The above multiple battery information is: Including an information identifier indicating a slave BMS among the plurality of slave BMSs that generated specific battery information, Battery system.

3. In paragraph 1, The above plurality of control signals are, Contains operation information for controlling the operation of at least one battery module among the plurality of battery modules. Battery system.

4. In paragraph 3, The above operation information is, A command identifier that includes a specific slave BMS among the plurality of slave BMSs, Battery system.

5. In paragraph 1, The above master BMS is, Wireless communication is performed with the plurality of slave BMSs using a frequency hopping method that uses the ISM (Industrial Scientific Medical) band as a frequency band. Battery system.

6. In paragraph 1, The above master BMS is, A wireless communication is performed by specifying a specific frequency band, selecting multiple hopping channels in the specific frequency band, and generating an arbitrary pattern using the selected hopping channels. Battery system.

7. In paragraph 1, A substrate on which the plurality of slave BMSs and the single antenna are arranged; and A housing including the plurality of battery modules and the substrate housed therein and the master BMS arranged therein, Battery system.

8. In paragraph 1, The above multiple slave BMSs are, An integrated distributor that receives the plurality of sensing signals, integrates the received plurality of sensing signals, and transmits the integrated plurality of sensing signals through the single antenna; and Including a plurality of connecting parts for connecting each node of the plurality of slave BMSs to the integrated distributor by wire, Battery system.

9. In paragraph 8, The above integrated distributor, Recognizing the command identifier of the control signal received from the master BMS and transmitting the control signal to a specific slave BMS among the plurality of slave BMSs, Battery system.

10. In paragraph 8, The above integrated distributor, Transmitting a control signal received from the master BMS to each of the plurality of slave BMSs through the plurality of connecting units, Battery system.

11. In paragraph 8, The above multiple connecting parts are, First, it is connected to each node of the above multiple slave BMSs, and the other end is connected to the integrated distributor. Battery system.

12. In paragraph 8, The above plurality of connecting parts are of equal length, Battery system.

13. In paragraph 8, A substrate on which the plurality of slave BMSs, the single antenna, the integrated distributor, and the plurality of connecting portions are arranged; and A housing including the plurality of battery modules and the substrate housed therein and the master BMS arranged therein, Battery system.

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