# US 11,027,674 B2 · Construction machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,674 B2 - Document ID: US11027674B2 - Status: Granted - Kind: B2 - Application number: 16/643,613 - Filed: 2018-11-27 - Published: 2020-07-02 - Granted: 2021-06-08 - Earliest claimed: 2017-12-15 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Hitachi Construction Machinery Co., Ltd. - Inventors: Tomoya Murazumi; Takenori Hiroki; Hisashi Tago; Hironori Itou - Web page: https://patentgrep.com/patent/US11027674B2 ## CPC - B60R 16/02: electric {constitutive elements} - B60R 25/403: {Power supply in the vehicle} - B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} - B60R 25/045: by limiting or cutting the electrical supply to the propulsion unit - B60R 25/33: of global position, e.g. by providing GPS coordinates - E02F 9/00: Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00 (laying-out or take-up devices for trailing electric cables B66C) - E02F 9/2091: {Control of energy storage means for electrical energy, e.g. battery or capacitors (energy recovery arrangements in hydraulic or pneumatic drives E02F9/2217)} - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02P 3/12: by short-circuit or resistive braking - E02F 9/003: {Devices for transporting the soil-shifting machines or excavators, e.g. by pushing them or by hitching them to a tractor} - E02F 9/2054: {Fleet management} - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ## Abstract A plus-side main connection line (17) connects electrical equipment (11), (12) to a plus terminal (16A) of a battery (16). A plus-side isolating switch (18) is provided in the plus-side main connection line (17) to connect or disconnect the electrical equipment (11), (12) and or from the plus terminal (16A) of the battery (16). A plus-side auxiliary connection line (20) connects a communication terminal (15) to the plus terminal (16A) of the battery (16) in a position upstream of the plus-side isolating switch (18). A minus-side main connection line (22) connects a minus terminal (16B) of the battery (16) to ground. A minus-side isolating switch (23) is provided in the minus-side main connection line (22) to connect or disconnect the minus terminal (16B) of the battery (16) and or from the ground. ## Claims ### Claim 1 A construction machine comprising: an electrical equipment installed in a vehicle body; a communication terminal for transmitting information of the vehicle body to a server; and a battery for supplying power to the electrical equipment and the communication terminal, characterized in that: the construction machine further comprises: a plus-side main connection line for connecting the electrical equipment and a plus terminal of the battery; a plus-side isolating switch provided on the plus-side main connection line for connecting or disconnecting the electrical equipment to or from the plus terminal of the battery; a key switch positioned at a downstream side of the plus-side isolating switch and is connected in series to the plus-side isolating switch for connecting or disconnecting the electrical equipment to or from the plus terminal of the battery; a plus-side auxiliary connection line positioned at an upstream side of the plus-side isolating switch for connecting the communication terminal and the plus terminal of the battery; a minus-side main connection line for connecting a minus terminal of the battery to ground; and a minus-side isolating switch provided on the minus-side main connection line for connecting or disconnecting the minus terminal of the battery to or from the ground. ### Claim 2 (depends on 1) The construction machine according to claim 1, wherein the plus-side isolating switch and the minus-side isolating switch are provided in a composite switch, the composite switch is configured to include: a first switching position where both the plus-side isolating switch and the minus-side isolating switch are in a connected state; a second switching position where the minus-side isolating switch is in the connected state while the plus-side isolating switch is in an isolated state; and a third switching position where both the plus-side isolating switch and the minus-side isolating switch are in the isolated state. ### Claim 3 (depends on 1) The construction machine according to claim 1, wherein the electrical equipment includes a memory, and the memory is connected to a plus-side branch line branched from the plus-side main connection line at a position between the plus-side isolating switch and the key switch. ### Claim 4 (depends on 3) The construction machine according to claim 3, wherein the plus-side branch line is connected to a control device installed in the vehicle body. ### Claim 5 (depends on 1) The construction machine according to claim 1, wherein the communication terminal includes a GPS antenna that acquires position information from a satellite and a communication antenna that communicates with the server.