# US 12,009,487 B2 · Slave battery management system at a boundary of metal housing and battery system including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,487 B2 - Document ID: US12009487B2 - Status: Granted - Kind: B2 - Application number: 17/311,932 - Filed: 2020-01-31 - Published: 2022-01-27 - Granted: 2024-06-11 - Earliest claimed: 2019-02-01 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Seong Yeol Yang; Ji Won Hwang; Yean Sik Choi - Web page: https://patentgrep.com/patent/US12009487B2 ## CPC - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 10/4207: {for several batteries or cells simultaneously or sequentially} - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/224: Metals - H02J 7/40: characterised by the exchange of charge or discharge related data - B60L 58/18: of two or more battery modules - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H04B 1/713: using frequency hopping - H04B 1/715: Interference-related aspects - H04B 2001/7154: {with means for preventing interference} - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H04B: TRANSMISSION - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery system includes 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 wirelessly communicate with a first battery management system among the plurality of slave battery management systems, wherein the first slave battery management system which communicates with the master battery management system is installed at a boundary of the metal housing so as not to be shielded with the metal housing. ## Claims ### Claim 1 A slave battery management system included in a battery pack comprising a metal housing capable of accommodating a plurality of battery modules, the slave battery management system comprising: a first communication unit including a first antenna disposed within the metal housing and configured to receive a signal from a plurality of other slave battery management systems arranged in the metal housing; a second communication unit including a second antenna disposed outside the metal housing and configured to receive a signal from a master battery management unit arranged outside the metal housing; a communication control unit configured to individually control the first communication unit and the second communication unit so that: the second communication unit transmits a signal received from the plurality of other slave battery management systems inside the metal housing to the master battery management system outside the metal housing; and the first communication unit transmits a signal received from the master battery management system outside the metal housing to at least one of the plurality of other slave battery management systems inside the metal housing; and a battery management unit configured to manage a respective battery module corresponding to the slave battery management system among the plurality of battery modules in the metal housing, wherein the slave battery management system is installed partly inside the metal housing and partly outside the metal housing. ### Claim 2 (depends on 1) The slave battery management system of claim 1, wherein the communication control unit is further configured to control the first communication unit to transmit/receive a signal to/from the plurality of other slave battery management systems through a channel selected by frequency hopping. ### Claim 3 (depends on 2) The slave battery management system of claim 2, wherein the communication control unit is further configured to control the second communication unit to transmit/receive a signal to/from the master battery management system through a single channel or a channel selected by frequency hopping. ### Claim 4 (depends on 1) The slave battery management system of claim 1, wherein the communication control unit is further configured to control: the first communication unit to communicate with the plurality of other slave battery management systems through a single channel; and the second communication unit to communicate with the master battery management system through a channel selected by frequency hopping. ### Claim 5 (depends on 1) The slave battery management system of claim 1, wherein the plurality of other slave battery management systems, arranged in the metal housing, are capable of communicating with the master battery management system only via the slave battery management system. ### Claim 6 (depends on 5) The slave battery management system of claim 5, wherein the slave battery management system is mounted in a vehicle. ### Claim 7 (depends on 1) The slave battery management system of claim 1, wherein: the battery management unit is further configured to measure a battery state of the respective battery module corresponding to the slave battery management system; and the communication control unit is further configured to control the second communication unit to transmit the signal received from the plurality of other slave battery management systems and a signal related to the measured battery state of the respective battery module corresponding to the slave battery management system to the master battery management system outside the metal housing. ### Claim 8 A communication method by a slave battery management system installed partly inside a metal housing of a battery pack and partly outside the metal housing and including a first antenna inside the metal housing and a second antenna outside the metal housing, the metal housing accommodating a plurality of battery modules, the communication method comprising: measuring a battery state of at least one of the plurality of battery modules; transmitting/receiving, via the first antenna inside the metal housing, a signal to/from each of a plurality of other slave battery management systems installed in the metal housing and configured to manage at least one other of the plurality of battery modules; and transmitting/receiving a signal to/from a master battery management system installed outside the metal housing via the second antenna outside the metal housing, wherein, in transmitting a signal to the master battery management system, a signal received from the plurality of other slave battery management systems inside the metal housing and a signal related to the measured battery state are transmitted together to the master battery management system outside the metal housing. ### Claim 9 (depends on 8) The communication method of claim 8, wherein, in the operation of transmitting/receiving a signal to/from each of the plurality of other slave battery management systems, the signal is transmitted/received to/from the plurality of other slave battery management systems through a channel selected by frequency hopping. ### Claim 10 (depends on 9) The communication method of claim 9, wherein, in the operation of transmitting/receiving a signal to/from the master battery management system, the signal is transmitted/received to/from the master battery management system through a single channel or a channel selected by frequency hopping. ### Claim 11 (depends on 8) The communication method of claim 8, wherein: in the operation of transmitting/receiving a signal to/from each of the plurality of other slave battery management systems, the signal is transmitted/received to/from the plurality of other slave battery management systems through a single channel; and in the operation of transmitting/receiving a signal to/from the master battery management system, the signal is transmitted/received through a channel selected by frequency hopping. ### Claim 12 A battery system, comprising: a battery pack comprising 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, respectively; and a master battery management system installed outside the metal housing and configured to wirelessly communicate with a first slave battery management system, among the plurality of slave battery management systems, configured to manage a respective battery module corresponding to the first slave battery management system among the plurality of battery modules, wherein the first slave battery management system, which is configured to wirelessly communicate with the master battery management system, is installed partly inside the metal housing and partly outside the metal housing so as not to be shielded with the metal housing, and other slave battery management systems among the plurality of battery management systems are disposed within the metal housing, and wherein the first slave battery management system includes: a first antenna disposed within the metal housing for wirelessly communicating with the other slave battery management systems in the metal housing; and a second antenna disposed outside the metal housing for wirelessly communicating with the master battery management system outside the metal housing. ### Claim 13 (depends on 12) The battery system of claim 12, wherein the at least one other slave battery management system is shielded in the metal housing. ### Claim 14 (depends on 12) The battery system of claim 12, wherein the first slave battery management system is further configured to communicate with the other slave battery management systems arranged in the metal housing through a channel selected by frequency hopping. ### Claim 15 (depends on 14) The battery system of claim 14, wherein the first slave battery management system is further configured to communicate with the master battery management system through a single channel or a channel selected by frequency hopping. ### Claim 16 (depends on 15) The battery system of claim 15, wherein the battery system is installed in a vehicle. ### Claim 17 (depends on 12) The battery system of claim 12, wherein the first slave battery management system is further configured to: communicate with the other slave battery management systems arranged in the metal housing through a single channel; and communicate with the master battery management system through a channel selected by frequency hopping. ### Claim 18 (depends on 12) The battery system of claim 12, wherein the first slave battery management system is further configured to: measure a battery state of the respective battery module corresponding to the first slave battery management system; and transmit a signal received from at least one of the other slave battery management systems and a signal related to the measured battery state of the respective battery module corresponding to the first slave battery management system to the master battery management system.