Battery system and slave battery management system

Abstract

Battery system, including: a battery pack that has a metal casing capable of accommodating a large number of battery modules; a multitude of slave battery management systems configured to manage the multitude of battery modules; and a master battery management system installed outside the metal enclosure to communicate wirelessly with a first slave battery management system among the multitude of slave battery management systems, wherein the first slave battery management system communicating with the master battery management system is installed at a boundary of the metal enclosure so that it is not shielded by the metal enclosure.

Description

TECHNICAL FIELD Reference to related applications

[0001] The present application claims priority over Korean patent application No. 10-2019-0013793, which was filed with the Korean Intellectual Property Office on February 1, 2019. Technical field

[0002] The present invention relates to a battery system and a slave battery management system for performing wireless communication between a slave battery management system and a master battery management system. STATE OF THE ART

[0003] Recently, there has been active research and development of secondary batteries. These secondary batteries, which are rechargeable, include all conventional Ni / Cd and Ni / MH batteries, as well as modern lithium-ion batteries. Lithium batteries among these secondary batteries offer the advantage of high energy density compared to conventional Ni / Cd or Ni / MH batteries. Furthermore, lithium-ion batteries can be manufactured to be small and lightweight, making them suitable for use as power sources in mobile devices. Since the application of lithium-ion batteries also extends to power sources for electric vehicles, they are attracting attention as the next generation of energy storage.

[0004] A secondary battery is typically used as a battery pack, which contains a battery module in which a large number of battery cells are connected in series or parallel. The condition and operation of the battery pack are managed and controlled by a battery management system (BMS).

[0005] The battery management system of a battery system comprising multiple battery packs can include a master battery management system and multiple slave battery management systems. The master battery management system communicates with a higher-level system to control the operation of the multiple slave battery management systems.

[0006] Recently, such a master battery management system and a variety of slave battery management systems have been transmitting / receiving signals wirelessly. However, wireless communication between a master battery management system and a slave battery management system in a vehicle battery management system can be unstable if a line of sight (LOS) connection between the master and slave battery management systems is not ensured. Furthermore, if the master or slave battery management system is shielded with a metallic material, the wireless communication between them can be unstable. REVELATION OF THE INVENTIONAL PROBLEM

[0007] An objective of the present invention is to enable wireless communication between a master battery management system and a slave battery management system when a wireless communication BMS is implemented where no LOS can be set, or when a shielding metal material is present between the master battery management system and the slave battery management system. TECHNICAL SOLUTION

[0008] According to one aspect of the present invention, a battery system is provided comprising: a battery pack having a metal housing capable of accommodating a plurality of battery modules; a plurality of slave battery management systems configured to manage the plurality of battery modules; and a master battery management system installed outside the metal housing to communicate wirelessly with a first slave battery management system among the plurality of slave battery management systems, wherein the first slave battery management system communicating with the master battery management system is installed at a boundary of the metal housing so that it is not shielded by the metal housing.

[0009] In the battery system according to an embodiment of the present invention, a plurality of other slave battery management systems, apart from the first slave battery management system, are arranged and shielded in the metal housing.

[0010] In the battery system according to an embodiment of the present invention, a first antenna for wireless communication with the plurality of other slave battery management systems arranged in the metal housing is installed in a section of the first slave battery management system that is located inside the metal housing, and a second antenna for wireless communication with the master battery management system is installed in a section of the first slave battery management system that is located outside the metal housing.

[0011] In the battery system according to an embodiment of the present invention, the first slave battery management system communicates with the plurality of other slave battery management systems arranged in the metal housing via a channel selected by frequency hopping.

[0012] In the battery system according to one embodiment of the present invention, the first slave battery management system communicates with the master battery management system via a single channel or a channel selected by frequency hopping.

[0013] In the battery system according to another embodiment of the present invention, the first slave battery management system communicates via a single channel with the plurality of other slave battery management systems arranged in the metal housing and communicates via a channel selected by frequency hopping with the master battery management system.

[0014] The battery system according to one embodiment or another embodiment of the present invention is installed in a vehicle.

[0015] According to another aspect of the present invention, a slave battery management system is provided which is contained in a battery pack having a metal housing capable of accommodating a plurality of battery modules, wherein the slave battery management system comprises: a first communication unit configured to receive a signal from the plurality of other slave battery management systems arranged in the metal housing; a second communication unit configured to receive a signal from a master battery management unit arranged outside the metal housing;a communication control unit configured to control the first communication unit and the second communication unit individually, such that the second communication unit transmits a signal received from the plurality of other slave battery management systems to the master battery management system, and the first communication unit transmits a signal received from the master battery management system to at least one of the plurality of other slave battery management systems; and a battery management unit configured to manage at least one of the plurality of battery modules, the slave battery management system being installed at a boundary of the metal enclosure.

[0016] In the slave battery management system according to an embodiment of the present invention, the communication control unit is configured to transmit / receive a signal to / from a plurality of other slave battery management systems via a channel selected by frequency hopping.

[0017] In the slave battery management system according to an embodiment of the present invention, the communication control unit is configured to transmit / receive a signal to / from the master battery management system via a single channel or a channel selected by frequency hopping.

[0018] In the slave battery management system according to another embodiment of the present invention, the communication control unit is configured to communicate with the plurality of other slave battery management systems via a single channel and with the master battery management system via a channel selected by frequency hopping.

[0019] In the slave battery management system according to an embodiment of the present invention, a first antenna for wirelessly transmitting / receiving a signal to / from the plurality of other slave battery management systems arranged in the metal housing is installed as a first communication unit in a section of the slave battery management system that is arranged in the metal housing, and a second antenna for wirelessly transmitting / receiving a signal to / from the master battery management system is installed as a second communication unit in a section of the slave battery management system that is arranged outside the metal housing.

[0020] In the slave battery management system according to an embodiment of the present invention, the plurality of other slave battery management systems arranged in the metal housing are only able to communicate with the master battery management system via the slave battery management system.

[0021] In the slave battery management system according to an embodiment of the present invention, the slave battery management system is mounted in a vehicle. BENEFICIAL EFFECTS

[0022] According to the present invention, the slave battery management system can perform stable wireless communication with a master battery management system without additional configuration, even when a slave battery management system is shielded with a metal housing.

[0023] Furthermore, wireless communication, which is robust against external signal interference, can be carried out between the slave battery management system and the master battery management system of the present invention by means of frequency hopping. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a block diagram illustrating a configuration of a battery control system. Fig. Figure 2 is a configuration diagram illustrating a battery system according to an embodiment of the present invention. Fig. Figure 3 is a configuration diagram illustrating a slave battery management system according to an embodiment of the present invention. Fig. Figure 4 is a flowchart illustrating a communication procedure that is not claimed. Fig. Figure 5 is a flowchart illustrating a communication method according to another embodiment that is not claimed. Fig. Figure 6 schematically illustrates a temporal communication sequence between a slave battery management system, another slave battery management system and a master battery management system with respect to a communication method according to an embodiment. Fig. Figure 7 illustrates an example of a frequency-hopping code in relation to a communication method according to one embodiment. Fig. Figure 8 is a configuration diagram illustrating a battery system according to another embodiment of the present invention. Fig. Figure 9 is a block diagram illustrating a hardware configuration of a battery management system according to an embodiment of the present invention. MODE FOR EXECUTING THE INVENTION

[0024] Various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] It should be understood, however, that the present invention is not limited to specific embodiments, but comprises various modifications, equivalents, and / or alternatives of different embodiments of the present invention. In the description of the drawings, the same reference numerals may refer to the same elements.

[0026] The terminology used herein is intended only to describe specific embodiments and is not meant to limit the scope of other embodiments. Singular terms may include plural forms unless otherwise stated. All terms used herein, including technical or scientific terms, have the same meanings as those generally understood by a person skilled in the art. Frequently used terms that are defined in a dictionary may be interpreted as having the same or similar meanings as those defined in the contextual meanings in the prior art and should not be interpreted in an idealized or overly formal sense unless expressly defined otherwise.Depending on the case, even the terms defined herein should not be interpreted in such a way as to exclude various embodiments of the present disclosure.

[0027] The terms “first”, “second”, “A”, “B”, “(a)”, “(b)”, and the like may be used here to describe elements of embodiments of the present invention. However, these terms are used only to distinguish one element from other elements, and the attributes or order of the elements are not limited by these terms. It is understood that when an element is described as “connected” or “coupled” with another element, it may be directly connected or coupled to the other element, or that intermediate elements may be present.

[0028] Fig. Figure 1 is a configuration diagram schematically illustrating a battery control system comprising a battery pack 10 and a higher-level control unit 2, which is contained in a higher-level system according to an embodiment of the present invention.

[0029] As in Fig. As illustrated in Figure 1, the battery pack 10 includes a battery module 300 containing at least one chargeable / dischargeable battery cell, a switching unit 220 connected in series with a positive terminal side or negative terminal side of the battery module 300 to control a charge / discharge current flow of the battery module 300, and a battery management system (BMS) 114 that monitors a voltage, current, temperature, and the like of the battery pack 10 to prevent overcharging and over-discharging.

[0030] The switching unit 220 can use a semiconductor switching element to control current flow for charging or discharging the battery module 300, for example, at least one MOSFET. Specifically, the switching unit 220 can include a charging switching element 220-1, which is controlled to be switched on during charging, and a discharging switching element 220-2, which is also controlled to be switched on during charging. However, this is only an example, and thus the switching unit 220 is not limited to a MOSFET; a relay or similar device can be used instead.

[0031] Furthermore, the BMS 114 can measure or calculate the voltage and current of a gate, source, and drain of the semiconductor switching element to monitor the voltage, current, temperature, and other parameters of the battery pack 10. It can also measure the current of the battery pack using a current sensor 240 located next to the semiconductor switching element. The BMS 114 can include a variety of terminals T1-T5 as an interface for receiving input measurements of the various parameters described above, along with circuitry connected to the terminals for processing the input values.

[0032] In addition, the BMS 114 can connect terminals T6 and T7 to a gate terminal of each MOSFET to control the switching on / off of the MOSFET, and can be connected to the battery module 300 to monitor the state of the battery module 300.

[0033] Since the configuration of battery pack 10 and the configuration of the BMS 114 described above are known, they will not be described in more detail.

[0034] Furthermore, according to embodiments of the present invention, the BMS 114 can be connected to the higher-level control unit 20. The operation of the BMS 114 can be controlled based on a signal applied by the higher-level control unit 20.

[0035] The following describes in detail a procedure for communication between the battery management system 114 and another battery management system.

[0036] Fig. Figure 2 is a configuration diagram illustrating a battery system 1 according to an embodiment of the present invention.

[0037] The battery system 1 includes the battery pack 10 including a variety of slave battery management systems 100 to 108 and a master battery management system 114.

[0038] To manage the condition and performance of a battery, when the master battery management system 114 receives an operating command from a higher-level control unit, the master battery management system 114 transmits an operating command signal to a slave battery management system, which is a subordinate battery management system. The operating command signal contains all signals relating to the battery's condition and performance. The slave battery management system that received the operating command signal performs an operation for a managed battery module, such as battery charging / discharging, battery condition check, or similar. Furthermore, once the slave battery management system has performed the battery condition check or similar operation, it transmits data regarding the battery condition check to the master battery management system.

[0039] The multiple slave battery management systems (100 to 108) manage a multitude of battery modules. One slave battery management system (108) among the multiple slave battery management systems is installed at one end of a metal housing of the battery pack (10).

[0040] Furthermore, the other slave battery management systems are installed among the multitude of slave battery management systems in the metal housing of battery pack 10.

[0041] The slave battery management systems 100 to 106 installed in the metal housing are shielded, making it difficult for the slave battery management systems 100 to 106 to communicate directly wirelessly with the master battery management system 114.

[0042] Therefore, the one slave battery management system 108 is installed among the multitude of slave battery management systems at a boundary of the metal housing to serve as a relay for carrying out wireless communication between the other slave battery management systems 100 to 106 and the master battery management system 114.

[0043] Specifically, the slave battery management system 108 is installed at a boundary of the metal housing of the battery pack 10, such that a first section of the slave battery management system 108 is located inside the metal housing and a second section of the slave battery management system 108 is located outside the metal housing.

[0044] Accordingly, since the slave battery management system 108 installed at a boundary of the metal housing of the battery pack 10 is not shielded by the metal housing, the slave battery management system 108 can transmit / receive signals via wireless communication with the other slave battery management systems 100 to 106 arranged in the metal housing, and can also transmit / receive signals via wireless communication with the master battery management system 114 arranged outside the metal housing.

[0045] The slave battery management system 108, installed on a boundary of the metal housing of the battery pack 10, includes a first antenna 110, which is installed in the first section arranged inside the housing, to wirelessly transmit / receive signals to / from the other slave battery management systems 100 to 106.

[0046] Furthermore, the slave battery management system 108, installed on a boundary of the metal housing of the battery pack 10, includes a second antenna 112, which is installed in the second section located outside the housing, to wirelessly transmit / receive signals to / from the master battery management system 114.

[0047] The slave battery management system 108 receives a signal from the other slave battery management systems 100 to 106 via a channel selected by frequency hopping.

[0048] Specifically, the slave battery management system 108 receives or transmits a signal to / from the slave battery management system 100 by performing frequency hopping for a short time using a predetermined initial hopping code. Here, the hopping code is a code used to transmit / receive signals while a preset frequency is changed after a preset time between two devices transmitting / receiving signals.

[0049] Furthermore, the slave battery management system 108 receives or transmits a signal from / to the slave battery management system 102 by performing frequency hopping for a short time using a predetermined second hopping code.

[0050] Furthermore, the slave battery management system 108 receives or transmits a signal from / to the slave battery management system 104 by performing frequency hopping for a short time using a predetermined third hopping code.

[0051] Furthermore, the slave battery management system 108 receives or transmits a signal from / to the slave battery management system 106 by performing frequency hopping for a short time using a predetermined nth hopping code.

[0052] The first to nth hopping codes are preset to prevent simultaneous frequency overlap.

[0053] As described above, the slave battery management system 108 can use frequency hopping when transmitting / receiving signals to / from the other slave battery management systems 100 to 106 arranged in the metal housing in order to carry out communication that is robust against external interference.

[0054] Furthermore, the slave battery management system 108 transmits signals received from each of the slave battery management systems 100 to 106 to the master battery management system 114 via a single channel or a channel selected by frequency hopping. This transmission of signals from the slave battery management system 108 to the master battery management system 114 can be carried out at a frequency different from the frequency used for communication between the slave battery management system 108 and the other slave battery management systems 100 to 106.Alternatively, the transmission of signals from slave battery management system 108 to master battery management system 114 can be performed at a time different from the signal transmission time between slave battery management system 108 and the other slave battery management systems 100 to 106. Data packets of a signal transmitted from slave battery management system 108 to master battery management system 114 can be the same as data packets transmitted from the other slave battery management systems 100 to 106 to slave battery management system 108, and vice versa.

[0055] This means that even if the master battery management system 114 transmits various signals, such as an operating command signal, to the slave battery management systems 100 to 106, it is possible that the slave battery management systems 100 to 106 will not receive the signals from the master battery management system 114 due to shielding by the metal housing, communication shadows, or similar factors. Therefore, the slave battery management system 108 can receive a signal from the master battery management system 114 via a single channel or a channel selected by frequency hopping. The slave battery management system 108, having received a signal from the master battery management system 114, can use any hopping code from the first to the nth hopping code to transmit signals to the other slave battery management systems 100 to 106 via a channel selected by frequency hopping.Similarly, the process of transmitting signals from slave battery management system 108 to the other slave battery management systems 100 to 106 can be carried out at a frequency different from the frequency at which the master battery management system 114 transmits signals to slave battery management system 108. Alternatively, the operation of transmitting signals from slave battery management system 108 to the other slave battery management systems 100 to 106 can occur at a time different from the time of signal transmission between slave battery management system 108 and master battery management system 114. Furthermore, data packets of a signal transmitted from slave battery management system 108 to the other slave battery management systems 100 to 106 can be the same as data packets transmitted from master battery management system 114 to slave battery management system 108.

[0056] The slave battery management system 108 and the multitude of slave battery management systems 100 to 106, arranged in the metal housing of the battery pack 10, can be implemented to transmit / receive signals over a single channel, taking into account that interference from an external channel is low due to the metal shielding. Since communication takes place over a single channel within the metal housing, implementing this configuration is therefore simple.

[0057] However, even in this case, signals are transmitted / received between the slave battery management system 108 and the master battery management system 114 via a channel selected by frequency hopping in order to prevent interference from other signals.

[0058] The battery system described above can, for example, be installed in a vehicle. That is, the battery system can be a vehicle battery system.

[0059] Fig. Figure 3 is a configuration diagram illustrating the slave battery management system 108 according to an embodiment of the present invention.

[0060] The slave battery management system 108 includes a first communication unit 302, a second communication unit 304, a communication control unit 306, a control unit 308 and a battery management unit 310.

[0061] The first communication unit 302 receives a signal from the multitude of slave battery management systems 100 to 106 arranged in the metal housing of the battery pack 10.

[0062] The first communication unit 302 receives a signal from the multitude of slave battery management systems 100 to 106 arranged in the metal housing via a channel selected by preset frequency hopping.

[0063] For example, the first communication unit 302 receives a signal from the slave battery management system 100 by performing frequency hopping for a short time using a predetermined first hopping code.

[0064] Furthermore, the first communication unit 302 receives a signal from the slave battery management system 102 by performing frequency hopping for a short time using a predetermined second hopping code.

[0065] Furthermore, the first communication unit 302 receives a signal from the slave battery management system 104 by short-term frequency hopping using a predetermined third hopping code.

[0066] Furthermore, the first communication unit 302 receives a signal from the slave battery management system 106 by performing frequency hopping for a short time using a predetermined nth hopping code.

[0067] The first to nth hopping codes are preset to prevent simultaneous frequency overlap.

[0068] The second communication unit 304 receives a signal from the master battery management system 114 via a single channel or a channel selected by frequency hopping.

[0069] The first communication unit 302 transmits signals received from each of the multitude of slave battery management systems 100 to 106 via a channel selected by frequency hopping to the master battery management system 114 via a single channel or a channel selected by frequency hopping.

[0070] Furthermore, the second communication unit 304 transmits a signal received from the master battery management system 114 via a single channel or a channel selected by frequency hopping to at least one of the multitude of slave battery management systems 100 to 106 via a channel selected by frequency hopping.

[0071] The communication control unit 306 controls the first communication unit 302 so that it transmits / receives signals to / from the multitude of slave battery management systems 100 to 106 arranged in the metal housing via a channel selected by frequency hopping using a preset hopping code.

[0072] Furthermore, the communication control unit 306 controls the second communication unit 304 so that it transmits / receives signals to / from the master battery management system 114 via a single channel or a channel selected by frequency hopping.

[0073] The communication control unit 306 can control the first communication unit 302 and the second communication unit 304 individually. That is, the communication control unit 306 can independently manage the communication between the first communication unit 302 and the multiple slave battery management systems 100 to 106, and the communication between the second communication unit 304 and the master battery management system 114. In other words, the operation of the first communication unit 302 and the operation of the second communication unit 304 can be carried out simultaneously or at different times.

[0074] The first communication unit 302 can also receive a signal via a single channel from the multitude of slave battery management systems 100 to 106 arranged within the metal housing.

[0075] In this case, the second communication unit 304 can receive a signal from the master battery management system 114 located outside the metal housing via a channel selected by frequency hopping.

[0076] Furthermore, the second communication unit 304 can transmit a signal received from the multitude of slave battery management systems 100 to 106 arranged in the metal housing via a single channel to the master battery management system 114 arranged outside the metal housing via a channel selected by frequency hopping.

[0077] Furthermore, the first communication unit 302 can transmit a signal received from the master battery management system 114 located outside the metal housing to at least one of the plurality of slave battery management systems 100 to 106 located inside the metal housing via a single channel using a channel selected by frequency hopping.

[0078] The control unit 308 controls the first communication unit 302, the second communication unit 304, the communication control unit 306 and the battery management unit 310.

[0079] The battery management unit 310 manages at least one of a large number of battery modules.

[0080] Fig. Figure 4 is a flowchart illustrating a communication procedure that is not claimed.

[0081] The first antenna 110 receives a signal from the multitude of slave battery management systems 100 to 106 (S400) arranged in the metal housing of the battery pack 10 via a channel selected by frequency hopping.

[0082] The second antenna 112 transmits a received signal to the master battery management system 114 via a single channel or a channel selected by frequency hopping (S402).

[0083] Although not shown, the same signal output can be carried out in the case that signals are transmitted from the master battery management system 114 to the slave battery management systems 100 to 106.

[0084] The second antenna 112 receives a signal from the master battery management system 114, located outside the metal housing of the battery pack 10, via a single channel or a channel selected by frequency hopping.

[0085] The first antenna 110 transmits a received signal via a channel selected by frequency hopping to at least one of the multiple slave battery management systems 100 to 106 arranged in the metal housing.

[0086] Fig. Figure 5 is a flowchart illustrating a communication method according to another embodiment that is not claimed.

[0087] Through a single channel, the first antenna 110 receives a signal from the multitude of slave battery management systems 100 to 106 (S500) arranged in the metal housing of the battery pack 10.

[0088] The second antenna 112 transmits a received signal via a channel selected by frequency hopping to the master battery management system 114 (S502).

[0089] Although not shown, the same signal output can be carried out in the case that signals are transmitted from the master battery management system 114 to the slave battery management systems 100 to 106.

[0090] The second antenna 112 receives a signal from the master battery management system 114, located outside the metal housing of the battery pack 10, via a channel selected by frequency hopping.

[0091] The first antenna 110 transmits a received signal via a single channel to at least one of the multiple slave battery management systems 100 to 106 arranged in the metal housing.

[0092] Although the Fig. 4 and Fig. Figure 5 illustrates a process of transmitting signals from the slave battery management systems 100 to 106 arranged in the housing to the master battery management system 114 via the slave battery management system 108. However, one embodiment is not limited to this. It would be clear to a person skilled in the art that the master battery management system 114 can transmit a signal to the other slave battery management systems 100 to 106 arranged in the housing via the slave battery management system 108, even if the master battery management system 114 transmits a signal to the slave battery management systems 100 to 108, as described above in relation to Fig. 3 described.

[0093] Fig. Figure 6 schematically illustrates a temporal communication sequence between a slave battery management system, another slave battery management system and a master battery management system with respect to a communication method according to an embodiment.

[0094] Regarding the slave battery management system 108, the channel through which a signal is received can be configured differently in each case. Furthermore, a channel received by each slave battery management system can be preset and changed.

[0095] Fig. Figure 7 shows a frequency-hopping code relating to a communication method according to one embodiment.

[0096] As in Fig. As illustrated in Figure 7, signals can be transmitted to or received from a variety of slave battery management systems or a master battery management system via a channel selected by frequency hopping using a preset hopping code.

[0097] Fig. Figure 8 is a configuration diagram illustrating a battery system according to another embodiment of the present invention.

[0098] The battery system according to the present embodiment has the same configuration as the battery system according to the one described in Fig. 2 illustrated embodiment, with the exception of relay 118. Thus, descriptions focusing on a different configuration are provided.

[0099] Relay 118 can, for example, be a repeater or an amplifier. Relay 118 is installed at a boundary of the metal housing of battery pack 10.

[0100] A first part of relay 118 is arranged inside the metal housing, and a second part of relay 118 is arranged outside the metal housing.

[0101] Accordingly, since the relay 118 installed at a boundary of the metal housing of the battery pack 10 is not shielded by the metal housing, the relay 118 can transmit / receive signals by wireless communication with the other slave battery management systems 100 to 106 arranged in the metal housing and can also transmit / receive signals by wireless communication with the master battery management system 114 arranged outside the metal housing.

[0102] The relay 118, installed on a boundary of the metal housing of the battery pack 10, contains a first antenna 110, which is installed in the first section arranged inside the housing, to wirelessly transmit / receive signals to / from the other slave battery management systems 100 to 106.

[0103] Furthermore, the relay 118, installed on a boundary of the metal housing of the battery pack 10, includes a second antenna 122, which is installed in the second section located outside the housing, to wirelessly transmit / receive signals to / from the master battery management system 114.

[0104] The relay 118 transmits / receives signals to / from the multitude of slave battery management systems 100 to 106 arranged in the metal housing and the master battery management system 114, each via a single channel.

[0105] An additional relay 118 can be installed to use multiple channels.

[0106] Fig. Figure 9 is a block diagram illustrating a hardware configuration of a battery management system according to an embodiment of the present invention.

[0107] A battery management system 900 can be equipped with a microcontroller (MCU) 910, which controls various processes and each configuration; a memory 940, in which an operating system program and various programs (e.g., a battery pack anomaly diagnostic program or a battery pack temperature estimation program) are stored; an input / output interface 930, which provides an input and output interface between a battery cell module and / or a semiconductor switching element; and a communication interface 920, which can communicate with the outside via a wired / wireless communication network. As described above, a computer program according to the present invention can be stored in the memory 940 and processed by the microcontroller 910 such that it can be used as a module to execute each of the functions described above. Fig. The 3 illustrated function blocks are implemented.

[0108] A battery pack that directly controls a battery is shielded with a metal enclosure to prevent intrusion or interference from an external signal. When the battery pack is shielded with a metal enclosure, communication within the battery pack can be simpler than communication outside of it. Therefore, the configuration described above is cost-effective for implementing network technology inside a battery pack and can prevent external intrusion or interference by using only a relay or a slave battery management system installed at the boundary of a metal enclosure.

[0109] In the present disclosure, the term "an embodiment" or various modified expressions thereof indicate that specific features, structures, and characteristics related to that embodiment are included in at least one embodiment of the principle of the present invention. The term "in an embodiment" and various modified expressions thereof should not be interpreted as referring to the same embodiment.

[0110] All embodiments and conditional examples disclosed herein are intended to help the person skilled in the art to understand the principle and concept of the present invention, and thus the person skilled in the art could understand that the present invention can be implemented in modified forms without departing from the essential features of the present invention. Therefore, the embodiments disclosed herein should be considered not as limiting but as illustrative. The scope of the present invention should not be defined by the above description but by the claims, and any differences that fall within the same scope as the claims should be interpreted as being covered by the present invention. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] KR 10-2019-0013793

[0001]

Claims

[1] Battery system, comprising: a battery pack that has a metal casing capable of accommodating a large number of battery modules; a multitude of slave battery management systems configured to manage the multitude of battery modules; and a master battery management system installed outside the metal enclosure to communicate wirelessly with a first slave battery management system among the multitude of slave battery management systems, wherein the first slave battery management system communicating with the master battery management system is installed at a boundary of the metal enclosure so that it is not shielded by the metal enclosure. [2] Battery system according to claim 1, wherein a plurality of other slave battery management systems other than the first slave battery management system are arranged in the metal housing and shielded. [3] Battery system according to claim 2, wherein a first antenna for wireless communication with the multitude of other slave battery management systems arranged in the metal housing is installed in a section of the first slave battery management system that is located inside the metal housing, and A second antenna for wireless communication with the master battery management system is installed in a section of the first slave battery management system that is located outside the metal housing. [4] Battery system according to claim 3, wherein the first slave battery management system communicates with the plurality of other slave battery management systems arranged in the metal housing via a channel selected by frequency hopping. [5] Battery system according to claim 4, wherein the first slave battery management system communicates with the master battery management system via a single channel or a channel selected by frequency hopping. [6] Battery system according to claim 3, wherein the first slave battery management system communicates with the plurality of other slave battery management systems arranged in the metal housing via a single channel and communicates with the master battery management system via a channel selected by frequency hopping. [7] Battery system according to claim 5 or 6, wherein the battery system is installed in a vehicle. [8] Slave battery management system included in a battery pack having a metal casing capable of accommodating a variety of battery modules, the slave battery management system comprising: a first communication unit configured to receive a signal from a variety of other slave battery management systems located inside the metal housing; a second communication unit configured to receive a signal from a master battery management unit located outside the metal housing; a communication control unit configured to control the first communication unit and the second communication unit individually, so that the second communication unit transmits a signal received from the multitude of other slave battery management systems to the master battery management system, and the first communication unit transmits a signal received from the master battery management system to at least one of the multitude of other slave battery management systems; and a battery management unit configured to manage at least one of the multiple battery modules, the slave battery management system is installed at a boundary of the metal housing. [9] Slave battery management system according to claim 8, wherein the communication control unit controls such that it transmits / receives a signal to / from the plurality of other slave battery management systems via a channel selected by frequency hopping. [10] Slave battery management system according to claim 9, wherein the communication control unit controls such that it transmits / receives a signal to / from the master battery management system via a single channel or a channel selected by frequency hopping. [11] Slave battery management system according to claim 8, wherein the communication control unit controls such that it communicates with the plurality of other slave battery management systems via a single channel and communicates with the master battery management system via a channel selected by frequency hopping. [12] Slave battery management system according to claim 8, wherein a first antenna for wirelessly transmitting / receiving a signal to / from the plurality of other slave battery management systems arranged in the metal housing is installed as the first communication unit in a section of the slave battery management system that is located inside the metal housing, and A second antenna for wirelessly transmitting / receiving a signal to / from the master battery management system is installed as a second communication unit in a section of the slave battery management system located outside the metal housing. [13] Slave battery management system according to claim 8, wherein the plurality of other slave battery management systems arranged in the metal housing can communicate with the master battery management system only via the slave battery management system. [14] Slave battery management system according to claim 13, wherein the slave battery management system is mounted in a vehicle.

Images