Battery systems with identical wireless communication performance

Abstract

The present invention relates to a battery system having identical wireless communication performance, and one embodiment of the present invention, a battery system that performs wireless communication using a frequency hopping method, may include a plurality of battery modules, a single antenna, a plurality of slave BMSs each connected to the plurality of battery modules, which sense the state of the plurality of battery modules and generate a plurality of battery information, and provide a plurality of sensing signals each containing the plurality of battery information to the single antenna, and a master BMS connected to the antenna, which receives the plurality of sensing signals transmitted through the single antenna via the antenna, acquires the plurality of battery information corresponding to the plurality of sensing signals, generates a plurality of control signals that control the plurality of battery modules using the acquired plurality of battery information, and transmits them to the single antenna via the antenna.

Description

Technical Field

[0001] [Cross - reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2024 - 0043438 filed on March 29, 2024, and all the contents disclosed in the literature of the Korean patent application are included as part of this specification.

[0002] The present invention relates to a battery system with the same wireless communication performance.

Background Art

[0003] 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. Inside the battery pack, the multiple distances between the multiple nodes of the multiple slave BMSs and the master BMS are different from each other, and the wireless communication performance of the multiple nodes will be different from each other, resulting in a wireless communication performance deviation.

[0004] Also, the multiple nodes of the multiple slave BMSs are affected by different structures depending on their installation positions. Therefore, the resonance frequency of the individual antenna connected to each of the multiple nodes may be changed by the structure at the installation position of each node. Therefore, there may additionally occur a wireless performance deviation due to a change in the resonance frequency in the frequency hopping channels assigned to each of the multiple nodes by frequency hopping.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a battery system that integrates the antennas of multiple slave BMSs and has the same wireless communication performance between the multiple slave BMSs and the master BMS.

Means for Solving the Problems

[0006] A battery system that performs 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, which sense the state of the plurality of battery modules and generate a plurality of battery information, and provide a plurality of sensing signals each containing the plurality of battery information to the single antenna, and a master BMS connected to the antenna, which receives the plurality of sensing signals transmitted through the single antenna via the antenna, acquires the plurality of battery information corresponding to the plurality of sensing signals, generates a plurality of control signals for controlling the plurality of battery modules using the acquired plurality of battery information, and transmits them to the single antenna via the antenna.

[0007] The aforementioned plurality of battery information may include an information identifier that indicates the slave BMS among the plurality of slave BMS that generated the specific battery information.

[0008] The plurality of control signals may include operational information for controlling the operation of at least one of the plurality of battery modules.

[0009] The operation information may include an instruction identifier that indicates a specific slave BMS among the plurality of slave BMSs.

[0010] The master BMS can communicate wirelessly with the multiple slave BMSs using a frequency hopping method that uses the ISM (Industrial Scientific Medical) band as its frequency band.

[0011] The master BMS can specify a specific frequency band, select multiple hopping channels from the specific frequency band, and use the selected hopping channels to generate an arbitrary pattern for wireless communication.

[0012] The housing may include a circuit board on which the plurality of slave BMSs and the single antenna are arranged, and a housing in which the plurality of battery modules and the circuit board are housed, and the master BMS is arranged on one side.

[0013] The plurality of slave BMSs may include an integration 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 connection units that wirely connect each node of the plurality of slave BMSs to the integration distributor.

[0014] The 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.

[0015] The integrated distributor can transmit control signals received from the master BMS to each of the multiple slave BMSs through the multiple coupling units.

[0016] The plurality of connecting units can be connected at one end to each node of the plurality of slave BMSs and at the other end to the integrated distributor.

[0017] The multiple connecting portions may be of the same length.

[0018] The housing may include a circuit board on which the plurality of slave BMSs, the single antenna, the integrated distributor, and the plurality of connecting parts are arranged, and a housing in which the plurality of battery modules and the circuit board are housed inside, and the master BMS is arranged on one side. [Effects of the Invention]

[0019] According to an embodiment of the present invention, it is possible to improve the deviation in the performance of wireless communication due to the distance difference between a plurality of slave BMSs and the master BMS or the influence of a structure, and to ensure stable and the same wireless communication performance.

[0020] The effects that can be obtained in the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those having ordinary knowledge in the technical field to which the present disclosure belongs from the following description.

Brief Description of the Drawings

[0021] [Figure 1] It is a block diagram of a battery system according to an embodiment of the present invention. [Figure 2] It is a block diagram of a battery system according to another embodiment of the present invention. [Figure 3] It is a drawing schematically showing an example of a battery system according to an embodiment of the present invention. [Figure 4] It is a drawing schematically showing an example of a battery system according to another embodiment of the present invention. [Figure 5] It is a drawing schematically showing a battery system in which each of a plurality of slave BMSs is connected to an individual antenna in a comparative example. [Figure 6] It is a drawing schematically showing an example of a battery system according to another embodiment of the present invention. [Figure 7] It is a drawing showing an embodiment example of a battery system according to another embodiment of the present invention. [Figure 8] It is a drawing showing a state in which each component of the embodiment example of FIG. 7 is separated. [Figure 9] It is a drawing showing a state in which the embodiment example of FIG. 7 is cut along the A - A' line.

Modes for Carrying Out the Invention

[0022] In describing the embodiments disclosed herein, if it is determined that a specific description of the relevant prior art would obscure the essence of the embodiments disclosed herein, such detailed description will be omitted. Furthermore, the accompanying drawings are provided for the purpose of easily understanding the embodiments disclosed herein and should not be understood as limiting the technical ideas disclosed herein, but rather as including all modifications, equivalents, or substitutions that fall within the concept and scope of the present invention.

[0023] Terms including ordinal numbers, such as "first," "second," etc., can be used to describe various components, but the components are not limited by these terms. These terms are used solely for the purpose of distinguishing one component from another.

[0024] When one component is described as being "linked" or "connected" to another component, it should be understood that it is directly linked to the other component, or may be connected, but other components may exist in between. On the other hand, when one component is described as being "directly linked" or "directly connected" to another component, it should be understood that there are no other components in between.

[0025] In this application, terms such as “includes” or “having” should be understood to specify the presence of features, figures, steps, actions, components, parts, or combinations thereof as described in the specification, and not to preemptively exclude the possibility of the presence or addition of one or more other features, figures, steps, actions, components, parts, or combinations thereof.

[0026] The present invention will be described in detail below with reference to the attached drawings.

[0027] Figure 1 is a block diagram of a battery system according to one embodiment of the present invention.

[0028] Referring to Figure 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 (BMS) 30.

[0029] In Figure 1, the battery 10 is connected between the two output terminals (OUT1, OUT2) of the battery system 2. A relay 20 is connected between the positive electrode of the battery system 2 and the first output terminal (OUT1), and a current sensor (not shown) is connected between the negative electrode of the battery system and the second output terminal (OUT2). In this disclosure, the potential of the positive electrode is higher than the potential of the negative electrode.

[0030] Battery 10 may include a plurality of battery modules (100-1, 100-2 to 100-N) connected in series and parallel. Each of the plurality of battery modules (100-1, 100-2 to 100-N) may include a plurality of battery cells electrically connected in series and parallel. In one embodiment, the battery cells may be rechargeable secondary batteries. In Figure 1, the plurality of battery modules (100-1, 100-2 to 100-N) are shown to be connected in series, and each of the plurality of battery modules (100-1, 100-2 to 100-N) is shown to include a plurality of battery cells connected in series, but is not limited to this. 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 parallel.

[0031] Relay 20 acts as a kind of switch that controls the electrical connection between the battery system 2 and the external device 1. When relay 20 is turned ON, the battery system 2 and the external device 1 are electrically connected and charging or discharging occurs. When relay 20 is turned OFF, the battery system 2 and the external device 1 are electrically isolated. At this time, the external device 1 can be a charger in a charging cycle that supplies power to the battery 10 and can be a load in a discharging cycle in which the battery 10 discharges power to the external device 1.

[0032] BMS30 can include multiple slave BMSs (200-1, 200-2~200-N) and a master BMS300. BMS30 can include at least one slave BMS (200-1~N) and a master BMS300.

[0033] Multiple slave BMSs (200-1, 200-2 to 200-N) and the master BMS 300 can send and receive signals wirelessly. For example, each of the multiple slave BMSs (200-1, 200-2 to 200-N) can measure the status of multiple battery modules (100-1, 100-2 to 100-N) and transmit each of the multiple sensing signals generated from that measurement to the master BMS 300. The master BMS 300 can also generate control signals based on the sensing signals and transmit these control signals to each of the multiple slave BMSs (200-1, 200-2 to 200-N).

[0034] In this embodiment, multiple slave BMSs (200-1, 200-2 to 200-N) and the master BMS 300 can communicate using a wireless communication method based on frequency hopping. Here, frequency hopping is a communication method that divides a specific frequency band into frequency bands of a predetermined size, has multiple channels with different frequency bands, and transmits the divided data while changing the channel through which the signal is transmitted. 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 a deterioration in communication quality.

[0035] Depending on the embodiment, the frequency band used in the frequency hopping method may include the ISM (Industrial Scientific Medical) band. Here, the ISM band refers to a frequency band allocated for industrial, scientific, and medical use and available for use without separate permission. Common ISM bands are set 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).

[0036] Multiple slave BMS units (200-1, 200-2~200-N) are connected to multiple battery modules (100-1, 100-2~100-N), and can sense the status of each of the battery modules (100-1, 100-2~100-N) to generate multiple battery information units.

[0037] Here, battery information refers to information obtained by a specific slave BMS from sensing the state of a specific battery module. In this embodiment, the battery information may include information measured by the slave BMS (e.g., cell current, cell voltage, cell temperature, etc.) and estimated information (e.g., SOC (State of Charge), SOH (State of Health)).

[0038] In this embodiment, the battery information may include an information identifier that indicates which of the multiple slave BMSs (200-1, 200-2 to 200-N) generated the battery information.

[0039] Multiple slave BMSs (200-1, 200-2 to 200-N) can generate multiple sensing signals, each containing multiple battery information, and transmit these multiple sensing signals to the master BMS 300 via a single antenna 410. Here, the single antenna 410 refers to a configuration that allows the multiple sensing signals generated by the multiple slave BMSs (200-1, 200-2 to 200-N) to be transmitted to the master BMS 300 simultaneously or at time intervals.

[0040] In other words, in a battery system according to one embodiment of the present invention, when performing many:1 wireless communication between a plurality of slave BMSs (200-1, 200-2 to 200-N) and a master BMS 300, wireless communication can be performed 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).

[0041] The master BMS300 can receive multiple sensing signals transmitted from each of the multiple slave BMSs (200-1, 200-2 to 200-N) and acquire battery information for each of the multiple battery modules (100-1, 100-2 to 100-N). Based on the acquired battery information, it can generate control signals. At this time, the generated control signals can be transmitted through the antenna 310 connected to the node of the master BMS300.

[0042] Here, the control signal refers to a signal for controlling the operation of each of the multiple battery modules (100-1, 100-2 to 100-N), and can include operation information for each of the multiple battery modules (100-1, 100-2 to 100-N). In this embodiment, the control signal can include at least one or more operation information.

[0043] Here, operation information refers to the information necessary to control the operation of a specific battery module among multiple battery modules (100-1, 100-2 to 100-N). In this embodiment, operation information may include commands that instruct each of the multiple battery modules (100-1, 100-2 to 100-N) on SOC, SOH, power limiting, cell balancing, fault diagnosis, cooling control, etc., along with the information necessary to perform said operations.

[0044] In this embodiment, the operation information may include an instruction identifier. Here, the instruction identifier means an identifier that indicates that the operation information is for a particular slave BMS among a plurality of slave BMSs (200-1, 200-2 to 200-N).

[0045] In this embodiment, the master BMS300 generates a frequency hopping code (Frequency Hopping Sequence) and can communicate wirelessly with multiple slave BMSs (200-1, 200-2 to 200-N) using the frequency hopping code.

[0046] For example, the master BMS300 can specify the ISM band as the frequency band used for wireless communication, select multiple hopping channels from among the multiple channels (CH_1-CH_N) present in the ISM band to be used for the frequency hopping method, and generate a frequency hopping code using the selected multiple hopping channels. Here, the hopping code refers to any pattern formed using the selected hopping channels.

[0047] For example, if the ISM bandwidth is divided into 10 channels from channel 1 (CH_1) to channel 10 (CH_10), the master BMS300 can select channel 1 (CH_1), channel 3 (CH_3), and channel 8 (CH_8) as hopping channels. The master BMS300 can then use the selected hopping channels, i.e., channel 1 (CH_1), channel 3 (CH_3), and channel 8 (CH_8), to divide and transmit data while changing channels in the order of channel 1 (CH_1), channel 3 (CH_3), channel 1 (CH_1), channel 8 (CH_8), and channel 3 (CH_3). In this case, the order in which the channels used to transmit data will form an arbitrary pattern, which is called the hopping code. In other words, the master BMS300 can reduce or solve signal interference problems by dividing and transmitting data while changing channels using the frequency hopping method.

[0048] The control signal received through the single antenna 410 is provided to multiple slave BMSs (200-1, 200-2 to 200-N), and each of the multiple slave BMSs (200-1, 200-2 to 200-N) can determine whether or not to operate based on the operation information, using the command identifier of the control signal as a reference. At this time, among the multiple slave BMSs (200-1, 200-2 to 200-N), the slave BMS indicated by the command identifier can operate based on the operation information of the control signal.

[0049] In this embodiment, the battery system 2 may include a substrate and housing for arranging and housing its components. For example, multiple slave BMSs (200-1, 200-2 to 200-N) and a single antenna 410 can be arranged on a substrate (not shown) made of an insulator. Alternatively, multiple battery modules (100-1, 100-2 to 100-N) can be housed together with the substrate inside a housing (not shown), and the master BMS 300 can be placed on one side of the housing. In this case, the single antenna 410 can be embodied as a chip and placed on a portion of the substrate, and can be connected to each of the multiple slave BMSs (200-1 to 200-6) on the substrate.

[0050] Figure 2 is a block diagram of a battery system according to the present invention and another embodiment.

[0051] Referring to Figure 2, another embodiment of the present invention may further include a plurality of coupling units (430-1, 430-2 to 430-N) and an integrated distributor 420. In this case, the single antenna 410 is not directly connected to each node of the plurality of slave BMSs (200-1, 200-2 to 200-N), but is connected to the plurality of slave BMSs (200-1, 200-2 to 200-N) through the integrated distributor 420 and the plurality of coupling units (430-1, 430-2 to 430-N). However, the configuration and the coupling relationships between the configurations shown in Figure 2 are examples and the present invention is not limited thereto.

[0052] Multiple connection units (430-1, 430-2~430-N) connect each node of multiple slave BMSs (200-1, 200-2~200-N) to the integrated distributor 420 via wired connections. One end of each of the multiple connection units (430-1, 430-2~430-N) is connected to each node of the multiple slave BMSs (200-1, 200-2~200-N), and the other end of each of the multiple connection units (430-1, 430-2~430-N) is connected to the integrated distributor 420. In this embodiment, the multiple connection units (430-1, 430-2~430-N) may be the same length as each other.

[0053] As shown in Figure 2, the multiple slave BMSs (200-1, 200-2 to 200-N) and the integrated distributor 420 are positioned at different locations within the battery system 2. In this case, the length of each of the multiple connection points (430-1, 430-2 to 430-N) can be determined by the distance from each of the multiple slave BMSs (200-1, 200-2 to 200-N) to the integrated distributor 420. That is, the multiple connection points (430-1, 430-2 to 430-N) have a difference in length from one another. This difference in length between the multiple connection points (430-1, 430-2 to 430-N) may result in a time difference in the time required for multiple sensing signals generated by the multiple slave BMSs (200-1, 200-2 to 200-N) to reach the integrated distributor 420.

[0054] Such time differences can be negligible. However, to resolve such time differences, the lengths of the multiple connection sections (430-1, 430-2~430-N) can be made identical. This should further reduce the wireless communication performance deviation between each of the multiple slave BMSs (200-1, 200-2~200-N) and the master BMS 300. If the multiple connection sections (430-1, 430-2~430-N) have the same length, depending on the positions where the multiple slave BMSs (200-1, 200-2~200-N) and the integrated distributor 420 are arranged, some of the multiple connection sections (430-1, 430-2~430-N) may be implemented in a folded or rolled structure.

[0055] In the embodiment, the multiple connecting sections (430-1, 430-2~430-N) may be RF coaxial cables. However, the types of the multiple connecting sections (430-1, 430-2~430-N) are not limited to these, and any configuration that allows each of the multiple slave BMSs (200-1, 200-2~200-N) to be connected to the integrated distributor 420 can be adopted.

[0056] The integrated distributor 420 receives multiple sensing signals from multiple slave BMSs (200-1, 200-2 to 200-N), integrates the received sensing signals, and transmits the integrated sensing signals through a single antenna 410. The integrated distributor 420 can also recognize the command identifier of the control signal received from the master BMS 300 and transmit the received control signal to a specific slave BMS among the multiple slave BMSs (200-1, 200-2 to 200-N). If the integrated distributor 420 does not recognize the command identifier, it can transmit the control signal to each of the multiple slave BMSs (200-1, 200-2 to 200-N) through multiple linking units (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 multiple slave BMSs (200-1, 200-2 to 200-N) can determine whether to operate based on the instruction identifier of the control signal or on the operation information.

[0057] At this time, an identifier can be displayed in the battery information and operation information included in the sensing signal and control signal, respectively. In this embodiment, the identifier can be used to indicate that it was generated by a specific slave BMS among multiple slave BMSs (200-1, 200-2 to 200-N), or it can be used to transmit to a specific slave BMS among multiple slave BMSs (200-1, 200-2 to 200-N).

[0058] When wireless communication is performed between the master BMS 300 and multiple slave BMSs (200-1, 200-2 to 200-N) using a frequency hopping method, interference between signals does not occur even when 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 use a frequency hopping method for wireless communication, it is necessary to control the communication between the master BMS 300 and multiple slave BMSs (200-1, 200-2 to 200-N) to prevent interference between signals integrated in the integrated distributor 420. This can be done by setting the frequency bands of the multiple sensing signals to be different from each other, or by setting the transmission times of the multiple sensing signals to be different for each.

[0059] Figure 3 is a schematic diagram showing an example of a battery system according to one embodiment of the present invention.

[0060] Referring to Figure 3, in one embodiment of the present invention, the battery system 2 has each node of the multiple slave BMSs (200-1, 200-2 to 200-6) connected to a single antenna 410. That is, the multiple slave BMSs (200-1, 200-2 to 200-6) communicate wirelessly with the master BMS 300 through the single antenna 410. As a result, multiple sensing signals generated by the multiple slave BMSs (200-1, 200-2 to 200-6) are all transmitted to the master BMS 300 at the same time. This prevents deviations in wireless communication performance caused by deviations in the multiple distances between the multiple nodes of the multiple slave BMSs (200-1, 200-2 to 200-6) and the master BMS 300.

[0061] Figure 4 is a schematic diagram illustrating an example of a battery system according to the present invention and another embodiment.

[0062] Referring to Figure 4, in another battery system 2 of the present invention, each node of a plurality of slave BMSs (200-1, 200-2 to 200-6) is connected to an integrated distributor by a plurality of coupling units (430-1, 430-2 to 430-6). The plurality of slave BMSs (200-1, 200-2 to 200-6) communicate wirelessly with the master BMS 300 through a single antenna 410. As a result, multiple sensing signals generated by the plurality of slave BMSs (200-1, 200-2 to 200-6) are all transmitted to the master BMS 300 at the same time. Therefore, it is possible to prevent deviations in wireless communication performance caused by deviations in the multiple distances between the multiple nodes of the plurality of slave BMSs (200-1, 200-2 to 200-6) and the master BMS 300.

[0063] Figure 5 is a comparative example, a schematic diagram showing a battery system in which multiple slave BMSs are each connected to an individual antenna.

[0064] As shown in Figure 5, the battery system may have certain structures between multiple slave BMSs and a master BMS depending on the design. In this case, the battery system is affected by different structures depending on the location of the multiple slave BMSs within the battery system. Therefore, 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 deviations in wireless performance occur due to the different resonant frequencies for the frequency hopping channels assigned to each slave BMS.

[0065] Figure 6 is a schematic diagram illustrating an example of a battery system according to another embodiment of the present invention.

[0066] Referring to Figure 6, in one embodiment of the present invention, the battery system 2 has multiple slave BMSs (200-1, 200-2 to 200-6) that communicate wirelessly with the master BMS 300 via a single antenna 410. Therefore, even if the multiple slave BMSs (200-1, 200-2 to 200-6) are installed in different locations within the battery system 2, the influence of structures on the wireless communication between the multiple slave BMSs (200-1, 200-2 to 200-N) and the master BMS 300 remains the same, and thus no deviation in wireless communication performance due to structural influence occurs.

[0067] Figure 7 is a drawing showing an embodiment of another embodiment of the present invention, Figure 8 is a drawing showing the components of the embodiment in Figure 7 separated, and Figure 9 is a drawing showing the embodiment in Figure 7 cut along the line A-A'.

[0068] Referring to Figures 7 to 9, the battery system 2 according to yet another embodiment of the present invention may be embodied in a form in which the battery 10, relay 20, and battery management system 30 are housed inside or arranged in the housing 40.

[0069] For example, as shown in Figures 7-9, the battery system 2 may be implemented in a configuration where the master BMS 300 is located in a part of the housing 40, and multiple battery modules 100-1 to 100-6 and multiple slave BMs (S200-1 to 200-6) are housed inside the housing 40. In this case, the antenna 310 connected to the master BMS 300 may be implemented as a chip built into the master BMS 300.

[0070] Figures 7-9 show a housing 40 containing six battery modules (100-1 to 100-6) and six slave BMSs (200-1 to 200-6). However, the number of battery modules and slave BMSs is not limited to these and can be freely changed as needed.

[0071] Figure 7 shows the master BMS 300 being built into the interior of the top surface of the housing 40, but the position of the master BMS 300 relative to the housing 40 is not limited to this and can be freely changed as needed. For example, the master BMS 300 can be placed on the inner or outer surface of the housing 40. In this case, the master BMS 300 can be placed on the outer surface of the housing 40 that faces the single antenna 410. Alternatively, the master BMS 300 may be placed outside the housing 40. Alternatively, the master BMS 300 may be placed on the outer or inner surface of the housing 40.

[0072] The housing 40 can be made of an insulator and may be embodied as a hexagonal case with a hollow interior, as shown in Figure 7. However, the shape and size of the housing 40 are not limited to these and can be freely changed as needed.

[0073] In this embodiment, the housing 40 may include multiple spaces (not shown) that separate and house each of the multiple battery modules (100-1 to 100-6), and in this case, the multiple spaces inside the housing 40 may be formed through partition walls (not shown).

[0074] In the embodiment, as shown in Figures 8 and 9, the multiple slave BMSs (200-1 to 200-6) may be implemented in a form provided on the substrate 41. In this case, the substrate 41 can be placed on the upper surface of the multiple battery modules (100-1 to 100-6) housed inside the housing 40, and can be made of an insulator.

[0075] Each of the multiple slave BMs (S200-1 to 200-6) provided on the circuit board 41 is arranged to correspond to each of the multiple battery modules (100-1 to 100-6) and is electrically connected to the multiple battery modules (100-1 to 100-6).

[0076] Figure 8 shows that there is one substrate 41, but the number of substrates 41 is not limited to this and can be freely changed as needed. For example, the number of substrates 41 may be the same as the number of slave BMs (S200-1 to 200-6), that is, multiple substrates 41 may be arranged on each of the multiple substrates 41, with multiple slave BMs (S200-1 to 200-6) each being placed on it.

[0077] In this embodiment, a circuit board 41 on which multiple slave BMs (S200-1 to 200-6) are provided can be configured and arranged with an integrated distributor 420 and multiple connecting parts (430-1 to 430-6). In this case, the integrated distributor 420 may be placed in a part of the circuit board 41 where the multiple slave BMs (S200-1 to 200-6) are not arranged, and it is connected to the wireless ports of the multiple slave BMSs (200-2 to 200-6) through the multiple connecting parts (430-1 to 430-6). In this case, the single antenna 410 may be implemented as a chip built into the circuit board 41 or the integrated distributor 420.

[0078] Figure 8 shows an integrated distributor 420 and a single antenna 410 arranged on the same board as multiple slave BMs (S200-1 to 200-6). However, the configuration of the board 41 on which the integrated distributor 420, single antenna 410, and multiple slave BMs (S200-1 to 200-6) are arranged is not limited to this and can be freely modified as needed. For example, the board 41 can be realized as multiple boards, and each of the multiple boards 41 may be arranged on its own board, each containing the integrated distributor 420, single antenna 410, and multiple slave BMs (S200-1 to 200-6). In other words, the integrated distributor 420, single antenna 410, and multiple slave BMs (S200-1 to 200-6) may be arranged on different boards.

[0079] In this embodiment, each of the multiple slave BMs (S200-1 to 200-6) can be placed in one of the multiple battery modules (100-1 to 100-6). In this case, the single antenna 410 can be placed in any one of the multiple battery modules (100-1 to 100-6). In this embodiment, the one battery module on which the single antenna 410 is placed may be the one located in the center of the multiple battery modules (100-1 to 100-6).

[0080] Figures 8 and 9 exaggerate the components of a battery system 2 according to one embodiment of the present invention for the sake of explanation.

[0081] For example, Figure 8 shows empty spaces between multiple battery modules 100-1 to 100-6 housed inside the housing 40, but this is an exaggeration for illustrative purposes, and the present invention is not limited to this and can be freely modified as needed. For example, the empty spaces between the multiple battery modules (100-1 to 100-6) may be filled with a specific structure, or the multiple battery modules (100-1 to 100-6) may be housed inside the housing 40 in such a way that there are no empty spaces between them.

[0082] Furthermore, although Figure 9 shows an empty space between the upper surface of the housing 40 and the substrate 41, this is an exaggerated representation for the sake of explanation, and the present invention is not limited to this, and can be freely modified as needed.

[0083] The scope of the present invention is defined by the claims, which are set forth below rather than in the detailed description above, and all modifications or altered forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be interpreted as being included within the scope of the present invention.

Claims

1. In a battery system that performs wireless communication, Multiple battery modules; Single antenna; Multiple slave BMSs, each connected to the multiple battery modules, sense the status of the multiple battery modules to generate multiple battery information, and provide multiple sensing signals containing the multiple battery information to the single antenna; and The system includes a master BMS connected to an antenna, which receives the plurality of sensing signals transmitted through the single antenna via the antenna, acquires the plurality of battery information corresponding 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 them to the single antenna via the antenna. Battery system.

2. The aforementioned multiple battery information, Among the aforementioned plurality of slave BMSs, an information identifier is included that indicates the slave BMS that generated the specific battery information, The battery system according to claim 1.

3. The aforementioned plurality of control signals are Includes operational information for controlling the operation of at least one of the aforementioned plurality of battery modules, The battery system according to claim 1.

4. The aforementioned operation information is, Among the aforementioned plurality of slave BMSs, including an instruction identifier that indicates a specific slave BMS, The battery system according to claim 3.

5. The aforementioned master BMS is Wireless communication is performed with the multiple slave BMSs using a frequency hopping method that uses the ISM band as the frequency band. The battery system according to any one of claims 1 to 4.

6. The aforementioned master BMS is A specific frequency band is specified, multiple hopping channels are selected from the specified frequency band, and an arbitrary pattern is generated using the selected hopping channels to perform wireless communication. The battery system according to any one of claims 1 to 4.

7. A substrate on which the plurality of slave BMSs and the single antenna are arranged; and The housing includes the plurality of battery modules and the circuit board, and the master BMS is located inside. The battery system according to any one of claims 1 to 4.

8. The aforementioned 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 The system includes multiple connection units that connect each node of the multiple slave BMSs to the integrated distributor via wired connections. The battery system according to any one of claims 1 to 4.

9. The aforementioned integrated distributor is The command identifier of the control signal received from the master BMS is recognized, and the control signal is transmitted to a specific slave BMS among the plurality of slave BMSs. The battery system according to claim 8.

10. The aforementioned integrated distributor is The control signals received from the master BMS are transmitted to each of the multiple slave BMSs through the multiple coupling units. The battery system according to claim 8.

11. The aforementioned plurality of connecting parts are One end is connected to each node of the plurality of slave BMSs, and the other end is connected to the integrated distributor. The battery system according to claim 8.

12. The aforementioned multiple connecting parts are of the same length. The battery system according to claim 8.

13. A substrate on which the plurality of slave BMSs, the single antenna, the integrated distributor, and the plurality of connecting parts are arranged; and The housing includes the plurality of battery modules and the circuit board, and the master BMS is located inside. The battery system according to claim 8.

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