Battery management system and operation method of battery management system

Abstract

The present disclosure relates to a battery management system and an operation method of the battery management system, and aims to provide a battery management system and an operation method of the battery management system capable of always maintaining the performance of wireless communication at a certain level or higher in various environments. To this end, the present disclosure provides a battery management system comprising: a plurality of antennas; a communication module configured to perform communication using any one of the plurality of antennas; a switch configured to selectively connect any one of the plurality of antennas with the communication module; and a processor configured to detect a reception sensitivity of an antenna connected to the switch and control the switch based on the reception sensitivity.

Description

[0001] This application claims the priority and benefits of Korean Patent Application No. 10-2023-0193229, filed with the Korean Intellectual Property Office on December 27, 2023, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] Aspects of embodiments of the present disclosure relate to a battery management system capable of maintaining the performance of wireless communication at a certain level or higher in various environments, a battery pack including the battery management system, and an operation method of the battery management system. Background Art

[0003] Unlike primary batteries that cannot be recharged, secondary batteries can be charged and discharged. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as motor drive power sources, storage batteries, etc. in hybrid vehicles, electric vehicles, etc. Such secondary batteries include an electrode assembly composed of a positive electrode and a negative electrode, a case accommodating the electrode assembly, and electrode terminals connected to the electrode assembly.

[0004] The above information disclosed in the background art of the present invention is only for improving the understanding of the background of the present invention, and thus may include information that does not constitute the prior art. Summary of the Invention

[0005] Embodiments of the present disclosure provide a battery management system capable of maintaining the performance of wireless communication at a certain level or higher in various environments, a battery pack including the same, and an operation method of the battery management system.

[0006] In an embodiment, there is provided a battery management system including: a plurality of antennas; a communication module configured to perform communication using any one of the plurality of antennas; a switch configured to selectively connect any one of the plurality of antennas to the communication module; and a processor connected to the communication module and the switch, wherein the processor detects the reception sensitivity of the antenna connected to the switch and controls the switch based on the reception sensitivity.

[0007] However, the technical problems to be solved by the present invention are not limited to the above problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention disclosed below.

[0008] According to an aspect of the present invention, there is provided a battery management system in which an antenna to be used for wireless communication among a plurality of antennas is determined based on the reception sensitivity of the antenna or the packet delivery rate of a signal received through the antenna. Brief Description of the Drawings

[0009] The following drawings attached to this specification illustrate embodiments of the present disclosure and further describe aspects and features of the present disclosure together with the detailed description of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the drawings: Figure 1 is a diagram showing a battery management system; Figure 2 and Figure 3 is a diagram showing the operation process of a switch; Figure 4 is a diagram showing an operation method of a battery management system; Figure 5 is a diagram showing another operation method of a battery management system; Figure 6 is a diagram showing a printed circuit board to which a pattern antenna is applied; Figure 7 is a diagram showing a printed circuit board to which a chip antenna is applied; and Figure 8 is a diagram showing a battery pack. Detailed Description of the Embodiments

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The terms or words used in this specification and claims should not be construed as being limited to the ordinary meaning or dictionary meaning, and should be interpreted as having a meaning and concept consistent with the technical concept of the present disclosure based on the principle that the inventor can be his / her own lexicographer to appropriately define the terms.

[0011] The embodiments described in this specification and the configurations shown in the drawings are only some of the embodiments of the present disclosure and do not represent all the technical concepts, aspects, and features of the present disclosure. Therefore, it should be understood that there can be various equivalents and modifications that can replace or modify the embodiments described herein at the time of filing this application.

[0012] It will be understood that when an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, the element or layer can be directly on, directly connected to, or directly coupled to the other element or layer, or there can also be one or more intervening elements or layers. When an element or layer is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. For example, when a first element is described as being "coupled" or "connected" to a second element, the first element can be directly coupled to or directly connected to the second element, or the first element can be indirectly coupled to or indirectly connected to the second element via one or more intermediate elements.

[0013] In the figures, for clarity of illustration, the dimensions of various elements, layers, etc. may be exaggerated. Like reference numerals denote like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Further, in describing embodiments of the present disclosure, the use of "(may) can" pertains to "one or more embodiments of the present disclosure". Expressions such as "at least one of..." and "any one of..." when following a list of elements modify the entire list of elements and not individual elements in the list. When phrases such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one of the group consisting of A, B, and C", or "at least one of A, B, and C" are used to specify a list of elements A, B, and C, the phrase can refer to any suitable combination (or subset) and all suitable combinations (or subsets) of A, B, and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the terms "use" and its variations may be considered respectively synonymous with the terms "utilize" and its variations. As used herein, the terms "substantially", "about", and similar terms are used as approximate terms and not as terms of degree, and are intended to account for the inherent variations in measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0014] It will be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, a first element, first component, first region, first layer, or first section discussed below may be referred to as a second element, second component, second region, second layer, or second section without departing from the teachings of the exemplary embodiments.

[0015] For ease of description, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. may be used herein to describe the relationship of one element or feature to another (other) element or feature as shown in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "under" or "below" other elements or features will then be oriented "above" or "over" the said other elements or features. Thus, the term "under" can encompass both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0016] The terms used herein are for the purpose of describing embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "a" and "an" are also intended to include the plural forms. It will also be understood that when the terms "comprises," "comprising," and / or their variants are used in this specification, it is specified that there are the stated features, integers, steps, operations, elements, and / or components, but it does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0017] In addition, any numerical range disclosed and / or recited herein is intended to include all sub-ranges having the same numerical precision included within the recited range. For example, the range "1.0 to 10.0" is intended to include all sub-ranges between the recited minimum value 1.0 and the recited maximum value 10.0 (and including the recited minimum value 1.0 and the recited maximum value 10.0), that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit recited herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit recited in this specification is intended to include all higher numerical limits contained therein. Accordingly, the applicant reserves the right to amend this specification and the claims to expressly recite any sub-ranges included within the ranges expressly recited herein. It is intended that all such ranges be inherently described in this specification such that the amendment of expressly reciting any such sub-ranges will comply with the requirements.

[0018] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same." Thus, the phrase "substantially the same" may include cases having a deviation considered to be low in the art (e.g., a deviation of 5% or less). Additionally, when a certain parameter is referred to as being uniform in a given region, it may mean that it is uniform in terms of the average value.

[0019] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0020] When any element is referred to as being "above (or below)" or "on (or under)" a component, it may mean that the any element is placed in contact with the upper (or lower) surface of the component, and it may also mean that another component may be disposed between the component and the any element disposed "above (or below)" or "on (or under)" the component.

[0021] In addition, it will be understood that when an element is referred to as being "coupled", "linked" or "connected" to another element, the elements may be "coupled", "linked" or "connected" directly to each other, or there may be intervening elements therebetween through which the elements may be "coupled", "linked" or "connected" to the other element. Further, when a component is referred to as being "electrically coupled" to another component, the component may be directly connected to the other component, or there may be intervening components therebetween such that the component and the other component are indirectly connected to each other.

[0022] Throughout the specification, unless otherwise stated, when stating "A and / or B", it means A, B, or A and B. That is, "and / or" includes any combination or all combinations of the listed items. When stating "C to D", unless otherwise specified, it means C or greater and D or less.

[0023] The rechargeable battery may be used as a battery module formed by a plurality of battery cells combined in series and / or in parallel to provide a high energy density, for example, for driving an electric motor of a hybrid vehicle. That is, the battery module is formed by interconnecting the electrode terminals of a plurality of battery cells according to the amount of electric power required to implement a high-power rechargeable battery for an electric vehicle, for example. To construct a battery pack, one or more battery modules are mechanically and electrically integrated.

[0024] The battery pack includes a battery management system (BMS) configured to manage the battery pack. The battery management system (main BMS) provided in the battery pack performs wireless communication with the battery management systems (slave BMSs) provided in each of at least one battery module included in the battery pack to receive various types of data required for battery management or to send any data to the battery module.

[0025] Meanwhile, when the battery pack is exposed to a noisy environment, the reception sensitivity of the antennas provided in the main BMS or the slave BMS may deteriorate, and thus, there may be a problem that the wireless communication between the main BMS and the slave BMS cannot be smoothly performed.

[0026] Figure 1 A battery management system is shown, and Figure 2 and Figure 3 the operation process of the switch is shown. Referring to Figure 1 , the battery management system (BMS) 100 may include a plurality of antennas 111 to 113, a communication module 120, a switch 130, a plurality of filters 141 to 143, a memory (not shown), and a processor 150. In various embodiments, the battery management system 100 may further include other components. Figure 1 The battery management system 100 in Figure 1The battery management system 100 therein can be a battery management system (e.g., a slave BMS) provided in the battery module.

[0027] The antennas 111 to 113 can be used to send data generated by the battery management system 100 to an external device or receive data sent from an external device. The multiple antennas 111 to 113 can include a first antenna 111, a second antenna 112, and a third antenna 113.

[0028] The first antenna 111 is a patterned antenna and can be formed on the printed circuit board of the battery management system 100. The patterned antenna can include a radiator formed of a conductive pattern. The second antenna 112 is a chip antenna and can be formed on the printed circuit board of the battery management system 100. The second antenna 112 can be mounted on the printed circuit board in the form of a chip. The chip antenna can be a bulk antenna or a low temperature co-fired ceramic (LTCC) type antenna. Different from the patterned antenna whose communication performance varies according to the direction of the radio wave to be received, the chip antenna has the advantage of being relatively less affected by the direction of the radio wave to be received. The third antenna 113 is an external antenna and can be formed outside the battery management system 100. The third antenna 113 can be formed in various forms, such as a dipole antenna, a monopole antenna, a parabolic antenna, a helical antenna, etc. The distance between the third antenna 113 and the filter 143 can be limited within 200 mm, and the third antenna 113 can be connected to the filter 143 through a separate connector (e.g., a JSC type connector).

[0029] The communication module 120 can communicate with an external device using one of the multiple antennas 111 to 113. The communication module 120 can communicate with an external device using various communication methods. For example, the communication module 120 can communicate with an external device using radio frequency (RF) communication. The communication module 120 can include a communication processor that operates independently of the processor 150 and supports wired or wireless communication. The communication module 120 can include a transceiver, a power amplifier module (PAM), and a frequency filter. The communication module 120 can include a surface acoustic wave (SAW) filter or a bulk acoustic wave (BAW) filter. The communication module 120 can also include various elements or devices for supporting wireless communication.

[0030] The switch 130 can selectively connect any one of the multiple antennas 111 to 113 to the communication module 120. The switch 130 can include a first contact configured to connect to the first antenna 111, a second contact configured to connect to the second antenna 112, and a third contact configured to connect to the third antenna 113. The switch 130 can selectively connect any one of the first contact to the third contact to the communication module 120. The switch 130 can be switched under the control of the processor 150.

[0031] For example, as Figure 2 shown, when the first contact is currently connected to the communication module 120 through the switch 130, the switch 130 can switch as Figure 3 shown when receiving a switching signal from the processor 150, so that the second contact can be connected to the communication module 120. In addition, when the second contact is currently connected to the communication module 120 through the switch 130, the switch 130 can switch when receiving a switching signal from the processor 150, so that the third contact can be connected to the communication module 120. Additionally, when the third contact is connected to the communication module 120 through the switch 130, the switch 130 can switch when receiving a switching signal from the processor 150, so that the first contact can be connected to the communication module 120.

[0032] When the switch 130 is not connected to any of the plurality of antennas 111 to 113, the switch 130 can output a feedback signal. When the switch 130 is not connected to any contact provided in the switch 130, the switch 130 can output a feedback signal. For example, the switch 130 can determine whether the switch 130 is connected to a contact by checking whether the switch 130 is powered on. To this end, a separate sensor (e.g., a current sensor) can be applied to the switch 130. The feedback signal can be output to the processor 150.

[0033] Meanwhile, in the embodiment, although it is described that the switch 130 itself determines whether the contact is connected, it can be determined by the processor 150 or the communication module 120 whether the contact is connected.

[0034] The filters 141 to 143 can be respectively connected between the antennas 111 to 113 and the switch 130. For example, the filters 141 to 143 can be band-pass filters. The filters 141 to 143 can remove frequency components other than preset frequency components. For example, assuming that the communication frequencies of the antennas 111 to 113 are 2.4 GHz, the filters 141 to 143 can remove the remaining frequency components other than the 2.4 GHz frequency band. The filters 141 to 143 can include at least one inductor and / or at least one capacitor. The antennas 111 to 113 can have different frequency characteristics according to their types. Therefore, the inductance component and / or capacitance component of the filters 141 to 143 can be set in consideration of the frequency characteristics of the antennas 111 to 113 connected to the filters 141 to 143, and thus, the inductance and / or capacitance of the filters 141 to 143 can be set differently.

[0035] The memory can store various types of information required during the operation of the processor 150. Various types of information calculated during the operation of the processor 150 can be stored in the memory.

[0036] At least one command executed by the processor 150 may be stored in the memory. The memory may be implemented as a volatile storage medium and / or a non-volatile storage medium, and may be implemented as, for example, a read-only memory (ROM) and / or a random access memory (RAM).

[0037] The processor 150 may be operably connected to the communication module 120, the switch 130, and the memory. The processor 150 may be implemented as a central processing unit (CPU) or a system on chip (SoC), may run an operating system or an application to control multiple hardware components or software components connected to the processor 150, and may perform various types of data processing and calculations. The processor 150 may be configured to execute at least one command stored in the memory and store the execution result data in the memory.

[0038] The processor 150 may detect the reception sensitivity (dBm) of the antenna currently connected to the switch 130 (hereinafter referred to as the target antenna). The processor 150 may detect the reception sensitivity of the target antenna by analyzing the signal received through the target antenna. Since the method of detecting the reception sensitivity of an antenna is known to those skilled in the art, its detailed description will be omitted.

[0039] Meanwhile, in an embodiment, although it is described that the processor 150 detects the reception sensitivity of the target antenna, the reception sensitivity of the target antenna may be detected by the communication module 120 and sent to the processor 150.

[0040] The processor 150 may control the switch 130 based on the reception sensitivity of the target antenna. For example, when the reception sensitivity of the target antenna is a preset reference value (or a preset standard value) or less, the processor 150 may output a switching signal to the switch 130 so that the switch 130 can be connected to another antenna. In an embodiment, when the reception sensitivity of the antenna currently connected to the switch 130 is a predetermined value (for example, -92 dBm) or less, by allowing communication to be performed using another antenna, the performance of wireless communication can always be maintained at a certain level or higher in various environments.

[0041] The processor 150 may detect the packet delivery rate (PDR) of the signal received through the target antenna. The processor 150 may detect the packet delivery rate of the signal received through the target antenna by analyzing the signal received through the target antenna. Since the method of detecting the packet delivery rate is known to those skilled in the art, its detailed description will be omitted.

[0042] The processor 150 may control the switch 130 based on the packet delivery rate of the signal received through the target antenna. For example, when the packet delivery rate of the signal received through the target antenna is a preset reference value (or a preset standard value) or less, the processor 150 may output a switching signal to the switch 130 so that the switch 130 can be connected to another antenna. In an embodiment, since communication is performed using another antenna when the data including the delivery rate of the signal received through the antenna currently connected to the switch 130 is a predetermined value (e.g., 99%) or less, the performance of the wireless communication can always be maintained at a certain level or higher in various environments.

[0043] Meanwhile, in an embodiment, although it is described that the switch 130 is controlled based on the packet delivery rate of the signal received through the target antenna, the switch 130 may be controlled based on the packet loss rate instead of the packet delivery rate. In this case, when the packet loss rate of the signal received through the target antenna is a preset reference value or greater, the processor 150 may output a switching signal to the switch 130 so that the switch 130 can be connected to another antenna.

[0044] The processor 150 may detect the reception sensitivity of each of the plurality of antennas 111 to 113 and control the switch 130 based on the reception sensitivity of each of the plurality of antennas 111 to 113. For example, the processor 150 may detect the antenna with the highest reception sensitivity by comparing the reception sensitivity of each of the plurality of antennas 111 to 113, and control the switch 130 so that the detected antenna and the communication module 120 can be connected.

[0045] The processor 150 may detect the packet delivery rate of each of the plurality of antennas 111 to 113 and control the switch 130 based on the packet delivery rate of each of the plurality of antennas 111 to 113. For example, the processor 150 may detect the antenna with the highest packet delivery rate by comparing the packet delivery rate of each of the plurality of antennas 111 to 113, and control the switch 130 so that the detected antenna and the communication module 120 can be connected.

[0046] The processor 150 may detect the reception sensitivity and the packet delivery rate of each of the plurality of antennas 111 to 113 and control the switch 130 based on the reception sensitivity and the packet delivery rate of each of the plurality of antennas 111 to 113. For example, the processor 150 may repeatedly perform a process of calculating the sum of the first weight applied to the reception sensitivity and the second weight applied to the packet delivery rate for each of the plurality of antennas 111 to 113, may identify the antenna having the largest sum among the plurality of antennas 111 to 113, and control the switch 130 so that the identified antenna and the communication module 120 can be connected.

[0047] When none of the multiple antennas 111 to 113 is connected to the communication module 120, the processor 150 may output a switching signal to the switch through another communication path. That is, when the switch 130 is not connected to any contact, the processor 150 may output a switching signal to the switch 130 through a separately provided communication path.

[0048] When receiving a feedback signal from the switch 130, the processor 150 may determine that none of the multiple antennas 111 to 113 is connected to the communication module 120. However, the method of checking whether the multiple antennas 111 to 113 are connected to the communication module 120 is not limited to the above embodiments, and various methods of checking whether the contacts are connected can be used to determine whether the multiple antennas 111 to 113 are connected to the communication module 120.

[0049] A first communication path and a second communication path may be formed between the processor 150 and the switch 130. The first communication path may be a communication path set to send a switching signal generated according to the reception sensitivity or the packet delivery rate. The second communication path may be a communication path set to send a switching signal generated according to the feedback signal.

[0050] Figure 4 The operation method of the battery management system is shown. Hereinafter, with reference to Figure 4 , the operation method of the battery management system will be described.

[0051] First, the processor 150 may detect the reception sensitivity (S401) of the antenna currently connected to the switch 130 (hereinafter referred to as the target antenna). In operation S401, the processor 150 may detect the reception sensitivity of the target antenna by analyzing the signal received via the target antenna.

[0052] Subsequently, the processor 150 may determine whether the reception sensitivity of the target antenna is a preset reference value or less (S403). In operation S403, the processor 150 may check whether the reception sensitivity of the target antenna is a reference value or less by comparing the reception sensitivity detected in operation S401 with the reference value.

[0053] When the reception sensitivity of the target antenna is a reference value or less, the processor 150 may output a switching signal to the switch 130 so that the switch 130 can be connected to another antenna (S405). When receiving the switching signal, the switch 130 may switch, and thus, another antenna may be connected to the switch 130.

[0054] Meanwhile, when there is no antenna with a reception sensitivity exceeding the reference value, the processor 150 can identify the antenna with the highest reception sensitivity among the multiple antennas 111 to 113, and control the switch 130 such that the switch 130 can be connected to the identified antenna.

[0055] Figure 5 Another operation method of the battery management system is shown. Hereinafter, with reference to Figure 5 , the operation method of the battery management system will be described.

[0056] First, the processor 150 can detect the packet delivery rate (S501) of the signal received through the antenna currently connected to the switch 130 (hereinafter referred to as the target antenna). In operation S501, the processor 150 can detect the packet delivery rate of the signal received through the target antenna by analyzing the signal received via the target antenna.

[0057] Subsequently, the processor 150 can determine whether the packet delivery rate of the signal received through the target antenna is a preset reference value or less (S503). In operation S503, the processor 150 can check whether the packet delivery rate of the signal received through the target antenna is a reference value or less by comparing the packet delivery rate detected in operation S501 with the reference value.

[0058] When the packet delivery rate of the signal received through the target antenna is a reference value or less, the processor 150 can output a switching signal to the switch 130 such that the switch 130 can be connected to another antenna (S505). When the switching signal is received, the switch 130 can be switched, and thus, another antenna can be connected to the switch 130.

[0059] Meanwhile, when there is no antenna with a packet delivery rate exceeding the reference value, the processor 150 can identify the antenna with the highest packet delivery rate among the multiple antennas 111 to 113, and control the switch 130 such that the switch 130 can be connected to the identified antenna.

[0060] Figure 6 A printed circuit board with a patterned antenna applied is shown. With reference to Figure 6 , the printed circuit board 600 can include a patterned antenna 601, a filter 602, a first ground 603, and a second ground 604.

[0061] The patterned antenna 601 can be formed in at least one area of the printed circuit board 600. The patterned antenna 601 can include a radiator formed of a conductive pattern.

[0062] The filter 602 may be formed in at least one area of the printed circuit board 600. The filter 602 may be electrically connected to the patterned antenna 601. The filter 602 may be connected to the patterned antenna 601 through a conductive area. The filter 602 may include at least one inductor and / or at least one capacitor. For example, the filter 602 may be a PI-type filter.

[0063] The first ground 603 may be formed in at least one area of the printed circuit board 600. The first ground 603 may be a communication module ground. The first ground 603 may be formed at a position spaced apart from the patterned antenna 601. The second ground 604 may be formed in at least one area of the printed circuit board 600. The second ground 604 may be a power ground. The second ground 604 may be formed at a position spaced apart from the patterned antenna 601. In this way, the embodiment prevents the communication performance of the antenna from deteriorating due to the ground by preventing the formation of a ground immediately adjacent to the patterned antenna.

[0064] The printed circuit board 600 may include a plurality of vias 605. The plurality of vias 605 may be formed around the area where the patterned antenna 601 is formed and the area where the communication module is installed, and may be arranged to be spaced apart from each other at a predetermined interval (e.g., 1 mm).

[0065] Figure 7 A printed circuit board to which a chip antenna is applied is shown. Referring Figure 7 , the printed circuit board 700 may include a chip antenna 701, a filter 702, a conductive area 703, and a ground 704.

[0066] The chip antenna 701 may be formed in at least one area of the printed circuit board 700. The chip antenna 701 may be a bulk antenna or a low temperature co-fired ceramic (LTCC)-type antenna.

[0067] The filter 702 may be formed in at least one area of the printed circuit board 700. The filter 702 may be electrically connected to the chip antenna 701. The filter 702 may be connected to the chip antenna 701 through the conductive area 703. The filter 702 may include at least one inductor and / or at least one capacitor. For example, the filter 702 may be a PI-type filter.

[0068] The ground 704 may be formed in at least one area of the printed circuit board 700. The ground 704 may be formed at a position spaced apart from the chip antenna 701. In this way, the embodiment prevents the communication performance of the antenna from deteriorating due to the ground by preventing the formation of a ground immediately adjacent to the chip antenna.

[0069] The printed circuit board 700 may include a plurality of vias 705. The plurality of vias 705 may be formed around the area where the chip antenna 701 is mounted and the area where the communication module is mounted, and may be set to be spaced apart from each other at a predetermined interval (e.g., 1 mm).

[0070] Figure 8 A battery pack is shown. Referring to Figure 8 , the battery pack 800 may include at least one battery module 810 and a battery management system 820. The battery pack 800 may include a pack housing in which an accommodation space is formed, and the accommodation space accommodates at least one battery module 810 therein. Of course, in various embodiments, the battery pack 800 may further include other components.

[0071] The battery module 810 may include a plurality of battery cells and a module housing. The battery module 810 may include a plurality of battery cells connected in series or in parallel with each other. The battery modules 810 may be connected in series or in parallel with each other.

[0072] The battery cells may be accommodated in the module housing in a stacked form. The battery cells may include a positive electrode lead and a negative electrode lead. Depending on the battery type, cylindrical, prismatic, or pouch-type battery cells may be used.

[0073] Instead of the battery module 810, a single-cell stack may form a module. The single-cell stack may be accommodated in the accommodation space of the pack housing or may be accommodated in an accommodation space separated by a frame, partition walls, etc.

[0074] The battery cells generate a large amount of heat during charging / discharging. The generated heat accumulates in the battery cells and accelerates the deterioration of the battery cells. Therefore, the battery pack 800 may further include a cooling member to suppress the deterioration of the battery cells. The cooling member is provided at the bottom of the accommodation space where the battery cells are provided, but is not limited thereto, and may be provided on the side surface or at the side surface according to the battery pack 800.

[0075] Exhaust gas in the battery cells generated under abnormal operating conditions (also referred to as thermal runaway or thermal event of the battery cells) may be discharged to the outside of the battery cells. Each of the battery pack 800 and the battery module 810 may include an exhaust port for discharging the exhaust gas to prevent damage to the battery pack 800 or the battery module.

[0076] The battery module 810 may include a battery module management system 811. The battery module management system 811 may correspond to a slave BMS. The battery module management system 811 may manage the battery module 810. The battery module management system 811 may detect the state (voltage, current, temperature, etc.) of the battery module 810 and detect status information indicating the state of the battery module 810. The battery module management system 811 may detect the state (voltage, current, temperature, etc.) of each battery cell constituting the battery module 810, and detect status information indicating the state of each battery cell.

[0077] The battery module management system 811 may communicate with the battery management system 820 in a wireless and / or wired manner. The battery module management system 811 may receive and process data sent from the battery management system 820. The battery module management system 811 may send data to the battery management system 820.

[0078] The battery module management system 811 may include a plurality of antennas, a communication module configured to perform communication using any one of the plurality of antennas, a switch that selectively connects the communication module to one of the plurality of antennas, and a processor that controls the switch based on the reception sensitivity of the antenna connected to the switch and / or the packet delivery rate of the signal received through the antenna connected to the switch.

[0079] The battery management system 820 may manage the battery pack 800. The battery management system may correspond to the main BMS. The battery management system 820 may detect the state (voltage, current, temperature, etc.) of the battery pack 800 and detect status information indicating the state of the battery pack 800. The battery management system 820 may detect the state (voltage, current, temperature, etc.) of each battery module 810 constituting the battery pack 800, and detect status information indicating the state of each battery module 810.

[0080] The battery management system 820 may communicate with the battery module management system 811 included in each battery module 810 in a wireless and / or wired manner. The battery management system 820 may receive and process data sent from each battery module management system 811. The battery management system 820 may send data to the battery module management system 811. The battery management system 820 may communicate with an external device in a wireless and / or wired manner.

[0081] The battery management system 820 may include a plurality of antennas, a communication module configured to perform communication using any one of the plurality of antennas, a switch that selectively connects the communication module to one of the plurality of antennas, and a processor that controls the switch based on the reception sensitivity of the antenna connected to the switch and / or the packet delivery rate of the signal received through the antenna connected to the switch.

[0082] As described above, according to the present disclosure, when the reception sensitivity of the antenna or the packet delivery rate of the signal received through the antenna is a preset standard value or less, since another antenna is used for communication, the performance of wireless communication can be maintained at a certain level or higher in various environments.

[0083] The embodiments described in this specification can be implemented in, for example, a method or process, a device, a software program, a data stream, or a signal. Although only the context of a single form of the embodiment is discussed (e.g., only the method is discussed), the embodiments of the features discussed can also be implemented in another form (e.g., a device or a program). The device can be implemented with appropriate hardware, software, firmware, etc. The method can be implemented in a device such as a processor, which generally refers to a processing device including a computer, a microprocessor, an integrated circuit, a programmable logic device, etc. In addition, the processor includes a communication device that facilitates information communication between end users, such as a computer, a cellular phone, a portable / personal digital assistant (PDA), other devices, etc.

[0084] According to one aspect of the present disclosure, when the reception sensitivity of the antenna or the packet delivery rate of the signal received through the antenna is a preset standard value or less, since another antenna is used for communication, the performance of wireless communication can be maintained at a certain level or higher in various environments.

[0085] However, the effects that can be obtained through the present disclosure are not limited to the above effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the disclosed description.

[0086] Although the present disclosure has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art should understand that various modifications and equivalents are possible. Therefore, the technical scope of the present disclosure should be defined by the appended claims.

Claims

1. A battery management system, comprising: Multiple antennas; a communication module configured to perform communication using any one of the plurality of antennas; a switch configured to selectively connect any one of the plurality of antennas to the communication module; as well as a processor connected to the communication module and the switch, The processor detects a reception sensitivity of an antenna connected to the switch and controls the switch based on the reception sensitivity.

2. The battery management system according to claim 1, wherein: When the reception sensitivity is a preset reference value or less, the processor outputs a switching signal to the switch so that the switch is connected to another antenna.

3. The battery management system according to claim 1, wherein: The processor detects a packet delivery rate of a signal received through the antenna connected to the switch, and controls the switch based on the packet delivery rate.

4. The battery management system according to claim 3, wherein: When the packet delivery rate is a preset reference value or less, the processor outputs a switching signal to the switch so that the switch is connected to another antenna.

5. The battery management system according to claim 1, wherein: The plurality of antennas include a first antenna, a second antenna, and a third antenna, Wherein, the first antenna is a pattern antenna, The second antenna is a chip antenna, and The third antenna is an external antenna. 6 . The battery management system according to claim 1 , further comprising a plurality of band pass filters respectively connected to the plurality of antennas.

7. The battery management system according to claim 1, wherein: When the communication module is not connected to any of the plurality of antennas, the processor outputs a switching signal to the switch through another communication path.

8. The battery management system according to claim 7, wherein: The switch is configured to output a feedback signal to the processor when the switch is not connected to any of the plurality of antennas, and The processor determines that the communication module is not connected to any of the plurality of antennas upon receiving the feedback signal.

9. A method for operating a battery management system, the method comprising the following steps: detecting a receiving sensitivity of an antenna connected to a switch, the switch being configured to selectively connect any one of a plurality of antennas with a communication module, the communication module being configured to perform communication using any one of the plurality of antennas; as well as The switch is controlled based on the reception sensitivity.

10. The operating method according to claim 9, wherein: In the step of controlling the switch based on the reception sensitivity, when the reception sensitivity is a preset reference value or less, a switching signal is output to the switch so that the switch is connected to another antenna.

11. The operating method according to claim 9, further comprising the following steps: detecting a packet delivery rate of a signal received through an antenna connected to the switch; and The switch is controlled based on the packet delivery rate.

12. The operating method according to claim 11, wherein: In the step of controlling the switch based on the packet delivery rate, when the packet delivery rate is a preset reference value or less, a switching signal is output to the switch so that the switch is connected to another antenna.

13. The operating method according to claim 9, wherein: The plurality of antennas include a first antenna, a second antenna, and a third antenna, Wherein, the first antenna is a pattern antenna, The second antenna is a chip antenna, and The third antenna is an external antenna.

14. The operating method according to claim 9, further comprising the following steps: When the communication module is not connected to any of the plurality of antennas, a switching signal is output to the switch through another communication path.

15. The operating method according to claim 14, wherein: In the step of outputting the switching signal through the another communication path, when a feedback signal output from the switch is received, it is determined that the communication module is not connected to any of the plurality of antennas.

Images