# US 2021/0344580 A1 · Diagnosis Apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0344580 A1 - Document ID: US20210344580A1 - Status: Published application - Kind: A1 - Application number: 17/279,921 - Filed: 2020-01-14 - Published: 2021-11-04 - Earliest claimed: 2019-01-14 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Dae Gon Jeon; Jang Hyeok Choi - Web page: https://patentgrep.com/patent/US20210344580A1 ## CPC - B60L 3/0084: {relating to control modules} - B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) - B60L 3/0007: {Measures or means for preventing or attenuating collisions} - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - B60L 3/12: Recording operating variables {; Monitoring of operating variables} - B60L 53/66: Data transfer between charging stations and vehicles - B60L 58/10: for monitoring or controlling batteries - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H04L 43/0823: Errors, e.g. transmission errors - H04Q 9/00: Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom - G01R 31/371: with remote indication, e.g. on external chargers - 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 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/12: Electric charging stations - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - 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 - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A diagnosis apparatus includes a vehicle including a battery and a BMS connected to the vehicle. The vehicle is configured to generate a signal having a predetermined period and a predetermined width, and the BMS is configured to diagnose a communication state between the vehicle and the BMS and a state of the battery based on the signal, and to determine the communication state and the state of the battery as a normal state when a period of the signal is the same as a reference period and a width of the signal is the same as a reference width. ## Claims ### Claim 1 A diagnosis apparatus for diagnosing a communication state between a vehicle including a battery and a battery management system (BMS) connected to the vehicle, wherein the diagnosis apparatus is included in the BMS and comprises: a controller configured to: receive, from the vehicle, a signal; compare a period of the received signal to a predetermined reference period; compare a width of the received signal to a predetermined reference width; and determine a communication state and a state of the battery based on the compared period and width of the signal, wherein, in response to the period of the signal being the same as the reference period and the width of the signal being the same as a reference width, the controller is configured to determine the communication state to be a normal communication state and the state of the battery to be a normal battery state. ### Claim 2 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal being the same as the reference width and the period of the signal being not the same as the reference period, the controller is configured to determine the communication state to be a disconnected communication state in which communication between the vehicle and the BMS is disconnected. ### Claim 3 (depends on 2) The diagnosis apparatus of claim 2, wherein in response to the width of the signal being the same as the reference width and the period of the signal being longer that the reference period, the controller is configured to determine the communication state to be the disconnected communication state. ### Claim 4 (depends on 2) The diagnosis apparatus of claim 2, wherein in response to the width of the signal being the same as the reference width and the period of the signal being shorter that the reference period, the controller is configured to determine the communication state to be the disconnected communication state. ### Claim 5 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal being wider than the reference width and the period of the signal being the same as the reference period, the controller is configured to determine the state of the battery to be a short-to-battery state. ### Claim 6 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal being wider than the reference width and the period of the signal being longer than the reference period, the controller is configured to determine the state of the battery to be a short-to-ground state. ### Claim 7 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal being wider than the reference width and the period of the signal being shorter than the reference period, the controller is configured to determine the state of the battery to be a short-to-battery state. ### Claim 8 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal being narrower than the reference width and the period of the signal being the same as the reference period, the controller is configured to determine the state of the battery to be a short-to-ground state. ### Claim 9 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal is narrower than the reference width and the period of the signal is longer than the reference period, the controller is configured to determine the state of the battery to be a short-to-ground state. ### Claim 10 (depends on 1) The diagnosis apparatus of claim 1, wherein in response to the width of the signal is narrower than the reference width and the period of the signal is shorter than the reference period, the controller is configured to determine the state of the battery to be a short-to-ground state. ### Claim 11 (depends on 1) The diagnosis apparatus of claim 1, wherein the signal is a universal asynchronous receiver/transmitter (UART) signal. ### Claim 12 (depends on 1) A diagnosis system comprising: the diagnosis apparatus of claim 1; and a BMS, wherein the diagnosis apparatus is included in the BMS. ### Claim 13 (depends on 12) The diagnosis system of claim 12, wherein the BMS further comprises: a comparator connected to an output terminal of the vehicle to receive the signal and to an input terminal of the controller to transmit the signal, wherein an output of the comparator is held at a reference voltage through a first pull-up resistor, a negative input electrode of the comparator is held at the reference voltage through a second pull-up resistor and connected to ground through a third resistor, and a positive input electrode of the comparator is held at the reference voltage through a fourth pull-up resistor. ### Claim 14 (depends on 13) The diagnosis system of claim 13, wherein the BMS further comprises: a filter connected between the output terminal of the vehicle and the positive input electrode of the comparator. ### Claim 15 (depends on 14) The diagnosis apparatus of claim 14, wherein the filter includes: a fifth resistor; and a capacitor connected to ground, wherein the filter is configured to remove noise from the signal. ### Claim 16 (depends on 12) A system comprising: a vehicle including a battery; and the diagnosis system of claim 12, wherein the BMS of the diagnosis system is connected to the vehicle.