# US 2020/0401155 A1 · Communication channel between a robotic lawnmower and a charging station > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401155 A1 - Document ID: US20200401155A1 - Status: Published application - Kind: A1 - Application number: 16/499,491 - Filed: 2018-02-07 - Published: 2020-12-24 - Earliest claimed: 2018-02-07 - Assignees: Globe (Jiangsu) Co., Ltd. - Applicants: Globe (Jiangsu) Co., Ltd. - Inventors: Jimmy Alzen - Web page: https://patentgrep.com/patent/US20200401155A1 ## CPC - A01D 34/008: {for automated or remotely controlled operation} - G05D 1/0225: {involving docking at a fixed facility, e.g. base station or loading bay (parking aids B62D15/027)} - A01D 34/001: {Accessories not otherwise provided for} - A01D 69/02: electric - B60L 53/12: Inductive energy transfer - B60L 53/14: Conductive energy transfer - B60L 53/66: Data transfer between charging stations and vehicles - G05D 1/0022: {characterised by the communication link (data switching networks in general H04L12/00)} - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - B60L 2260/32: Auto pilot mode - H02J 7/731: {specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence)} - 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 90/14: Plug-in electric vehicles - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - A01D: HARVESTING; MOWING - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES - 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 - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A bidirectional communication channel between a robotic lawnmower and a charging station for data communication between the robotic lawnmower and the charging station. The communication channel includes a first interface provided on the robotic lawnmower and a second interface provided on the charging station. The first and second interface are connected to each other through charging contacts and configured to communicate data in a Direct Current, DC-balanced way. Each interface is provided with an inductor in a charging power path between the charging station and the robotic lawnmower. Each inductor includes a high impedance for enabling a high data transmission rate for frequencies above 50 kHz. ## Claims ### Claim at position 1 1-7. (canceled) ### Claim 8 A bidirectional communication channel between a robotic lawnmower and a charging station for data communication between a first control unit in the robotic lawnmower and a second control unit in the charging station, the bidirectional communication channel comprising: a first interface with charging contacts provided on the robotic lawnmower, and a second interface with charging contacts provided on the charging station, wherein the first interface and the second interface are connected to each other through said charging contacts, wherein the first interface and the second interface and the first control unit and the second control unit are configured to communicate data in a Direct Current, DC-balanced way, wherein each of the first interface and the second interface is provided with an inductor in a charging power path between the charging station and the robotic lawnmower, and wherein each of the inductors has an impedance of at least 7 Ohm for frequencies above 50 kHz. ### Claim 9 (depends on 8) The bidirectional communication channel according to claim 8, wherein the first interface, the second interface, the first control unit, and the second control unit are configured to use Manchester encoding for DC-balancing the data transmission between the robotic lawnmower and the charging station. ### Claim 10 (depends on 8) The bidirectional communication channel according to claim 8, wherein the first interface, the second interface, the first control unit, and the second control unit are configured to use 8b/10b encoding for DC-balancing the data transmission between the robotic lawnmower and the charging station. ### Claim 11 (depends on 8) The bidirectional communication channel according to claim 8, wherein the first interface and the second interface each comprises an amplifier with hysteresis configured to receive data. ### Claim 12 (depends on 11) The bidirectional communication channel according to claim 11, wherein each amplifier with hysteresis comprises an amplifier and a Schmitt-trigger connected in series. ### Claim 13 (depends on 8) The bidirectional communication channel according to claim 8, wherein the first interface and the second interface each comprises an amplifier configured to amplify an outgoing signal. ### Claim 14 (depends on 8) The bidirectional communication channel according to claim 8, wherein an inductance of each of the inductors is in the range of 20-100 μH. ### Claim 15 (depends on 14) The bidirectional communication channel according to claim 14, wherein the inductance of each of the inductors is 47 μH.