# US 2016/0257293 A1 · Hybrid construction machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0257293 A1 - Document ID: US20160257293A1 - Status: Published application - Kind: A1 - Application number: 14/990,822 - Filed: 2016-01-08 - Published: 2016-09-08 - Earliest claimed: 2015-03-03 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Hitachi Construction Machinery Co., Ltd. - Inventors: Chiaki Takahashi; Ken Takeuchi; Shinya Imura - Web page: https://patentgrep.com/patent/US20160257293A1 ## CPC - H02J 7/977: {of the battery} - B60K 6/20: the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs - B60K 25/00: Auxiliary drives (arrangement of tyre-inflating pumps mounted on vehicles B60C23/10) - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/26: for electrical energy, e.g. batteries or capacitors - B60W 20/10: Controlling the power contribution of each of the prime movers to meet required power demand - E02F 3/32: working downwardly and towards the machine, e.g. with backhoes - E02F 9/2075: {of the hybrid type (for vehicles in general B60W20/00)} - 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)} - B60W 2510/246: Temperature - B60W 2710/06: Combustion engines, Gas turbines - B60W 2710/08: Electric propulsion units - B60W 2710/244: Charge state - B60Y 2200/41: Construction vehicles, e.g. graders, excavators - B60Y 2200/92: Hybrid vehicles - B60Y 2300/182: Selecting between different operative modes, e.g. comfort and performance modes - B60Y 2306/05: Cooling - B60Y 2400/112: Batteries - B60Y 2400/20: Energy converters - B60Y 2400/61: Arrangements of controllers for electric machines, e.g. inverters - B60Y 2400/81: Braking systems - B60Y 2400/87: Auxiliary drives - G01R 31/382: Arrangements for monitoring battery or accumulator variables, e.g. SoC - G01R 31/392: Determining battery ageing or deterioration, e.g. state of health - Y10S 903/93: Conjoint control of different elements - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract The hybrid construction machine includes an engine 11, an electric motor/generator 14, a hydraulic pump unit 17, an electricity storage device 16, an inverter 15, a temperature regulator (16D or 16E), and a hybrid control unit 22. The hybrid control unit 22 executes at least one of first control for controlling a warming-up battery temperature regulator 16D so that it increases a temperature of the electricity storage device 16, second control for controlling the inverter 15 so that it reduces the power output from the inverter 15, and third control for controlling a pump capacity control unit 21 so that it reduces the flow rate of a hydraulic fluid delivered from the hydraulic pump unit 17, according to a charge/discharge history of the electricity storage device 16. ## Claims ### Claim 1 A hybrid construction machine comprising: an engine; an electric motor/generator that assists power of the engine during power running and generates electricity during regenerative braking; a hydraulic pump unit that is driven by the power of the engine and delivers a hydraulic fluid; an electricity storage device; a power converter that converts direct-current power that has been received from the electricity storage device during the power running into alternating-current power and supply the alternating-current power to the electric motor/generator, the power converter converting the alternating-current power that the electric motor/generator has generated into direct-current power and supplying the direct-current power to the electricity storage device; a temperature regulator that regulates a temperature of the electricity storage device; and a control unit that executes at least one of first control, second control, and third control in accordance with a charge/discharge history of the electricity storage device, the first control controlling the temperature regulator so that the temperature of the electricity storage device increases, the second control controlling the power converter so that the power that is output from the power converter is reduced, the third control controlling the hydraulic pump unit so that a flow rate of the fluid delivered from the hydraulic pump unit is reduced. ### Claim 2 (depends on 1) The hybrid construction machine according to claim 1, wherein the charge/discharge history is data on charge/discharge current of the electricity storage device, the data being measured during a certain period of time in a past. ### Claim 3 (depends on 2) The hybrid construction machine according to claim 2, wherein the data includes an electrical current value of the charge/discharge current, and the control unit is configured to calculate a charge/discharge time ratio denoting a rate of, with respect to the certain period of time, a sum of a period of time during which the current value of the charge/discharge current is equal to or greater than a first threshold level Ld, and a period of time during which the current value of the charge/discharge current is equal to or smaller than a second threshold level Lc that is smaller than the first threshold level, and execute at least one of the first control, the second control, and the third control in accordance with the charge/discharge time ratio. ### Claim 4 (depends on 3) The hybrid construction machine according to claim 3, wherein the control unit assigns a greater weight to a current value measured more recently among current values measured in the period during which the current value of the charge/discharge current is equal to or greater than the first threshold level Ld, and the period during which the current value of the charge/discharge current is equal to or smaller than the second threshold level Lc ### Claim 5 (depends on 3) The hybrid construction machine according to claim 3, wherein if the charge/discharge time ratio is equal to or higher than a third threshold level Rt_temp, the control unit executes the first control by assigning to a target temperature of the electricity storage device a value at which the target temperature increases with an increase in charge/discharge time ratio, and controlling the temperature regulator so that the temperature of the electricity storage device equals the target temperature. ### Claim 6 (depends on 3) The hybrid construction machine according to claim 3, wherein if the charge/discharge time ratio is equal to or higher than a fourth threshold level Rt_bat, the control unit executes the second control by assigning to an output reduction ratio of the electricity storage device a value at which the output reduction ratio increases with an increase in charge/discharge time ratio, assigning a command value for the electric power output from the power converter in accordance with the output reduction ratio of the electricity storage device, and controlling the power converter so that the power output from the power converter matches the command value. ### Claim 7 (depends on 3) The hybrid construction machine according to claim 3, wherein if the charge/discharge time ratio is equal to or higher than a fifth threshold level Rt_pause, the control unit executes the second control by bringing the power converter into a pause. ### Claim 8 (depends on 3) The hybrid construction machine according to claim 3, wherein if the charge/discharge time ratio is equal to or higher than a sixth threshold level Rt_pump, the control unit executes the third control by assigning to a power reduction ratio of the hydraulic pump unit a value at which the power reduction ratio increases with an increase in charge/discharge time ratio, assigning a command value for the electric power output from the power converter in accordance with the power reduction ratio of the hydraulic pump unit, and controlling the power converter so that the power output from the power converter matches the command value. ### Claim 9 (depends on 2) The hybrid construction machine according to claim 2, wherein the data includes a current value or power value of the charge/discharge current, and the control unit is configured to calculate a cumulative current value or power value of the charge/discharge current, and execute at least one of the first control, the second control, and the third control in accordance with the charge/discharge time ratio. ### Claim 10 (depends on 9) The hybrid construction machine according to claim 9, wherein the cumulative value is computed by integration of the current value of the charge/discharge current or integration of absolute value or square value of the current value or power value of the charge/discharge current. ### Claim 11 (depends on 2) The hybrid construction machine according to claim 2, wherein the data includes a current value or power value of the charge/discharge current, and the control unit is configured to calculate an output value of feedback control based upon the current value or power value of the charge/discharge current, and execute at least one of the first control, the second control, and the third control in accordance with the output value of the charge/discharge time ratio. ### Claim 12 (depends on 1) The hybrid construction machine according to claim 1, wherein the control unit executes the first control if the temperature of the electricity storage device is equal to or lower than a first temperature. ### Claim 13 (depends on 12) The hybrid construction machine according to claim 12, wherein if the temperature of the electricity storage device is equal to or higher than a second temperature that is higher than the first temperature, the control unit executes fourth control to control the temperature regulator so that the temperature of the electricity storage device decreases. ### Claim 14 (depends on 1) The hybrid construction machine according to claim 1, wherein the control unit executes only the first control among the first control, the second control, and the third control.