# US 2020/0399856 A1 · Construction Machine Management System

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- Number: US 2020/0399856 A1
- Document ID: US20200399856A1
- Status: Published application
- Kind: A1
- Application number: 16/978,498
- Filed: 2019-06-25
- Published: 2020-12-24
- Earliest claimed: 2018-06-28
- Assignees: Hitachi Construction Machinery Co., Ltd.
- Applicants: Hitachi Construction Machinery Co., Ltd.
- Inventors: Akira WATANABE; Ken TAKEUCHI; Itaru NAYA
- Web page: https://patentgrep.com/patent/US20200399856A1

## CPC

- 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)}
- B60L 58/10: for monitoring or controlling batteries
- B60L 58/12: responding to state of charge [SoC]
- E02F 9/26: Indicating devices {(E02F5/145 takes precedence)}
- G01R 31/36: Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R 31/371: with remote indication, e.g. on external chargers
- G07C 5/02: Registering or indicating driving, working, idle, or waiting time only (apparatus forming part of taximeters G07B13/00)
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J 7/40: characterised by the exchange of charge or discharge related data
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- H02J 7/82: Control of state of charge [SOC]
- H02J 13/00: Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J 13/13: characterised by the transmission of data to equipment in the power network
- B60L 2200/40: Working vehicles
- E02F 9/2228: {including an electronic controller}
- E02F 9/2285: {Pilot-operated systems}
- E02F 9/2296: {Systems with a variable displacement pump}
- 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 2105/30: the load networks being external to vehicles, i.e. exchanging power with vehicles
- H02J 2105/33: exchanging power with road vehicles
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 90/167: Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
- Y04S 30/12: Remote or cooperative charging
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)
- 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
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- 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
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

A management server (52) receives a maximum value and a minimum value of the respective voltages (cell voltages) in a plurality of battery cells (19A, 19A) configuring an electricity storage device (19) of a hydraulic excavator (1) from the hydraulic excavator (1), and stores the maximum value and the minimum value in a storage device (52A). Discharge characteristics of the electricity storage device (19) are stored in the storage device (52A) in the management server (52). A battery state estimation calculating unit (52D) in the management server (52) calculates an estimation maximum value and an estimation minimum value of cell voltages in the present or in the future by adding the discharge characteristics stored in the storage device (52A) to the latest maximum value and the latest minimum value of the cell voltages stored in the storage device (52A). A management information producing unit (52C) outputs information based upon the estimation maximum value and the estimation minimum value of the cell voltages calculated in the battery state estimation calculating unit (52D).

## Claims

### Claim 1

A construction machine management system provided with a management device that is disposed in a position away from a construction machine including an electricity storage device and a communication device and manages the electricity storage device by receiving information of the electricity storage device transmitted through the communication device from the construction machine, characterized in that:
the information of the electricity storage device includes:
information including a maximum value and a minimum value of respective voltages in a plurality of battery cells configuring the electricity storage device; or
information including a maximum value and a minimum value of respective charging rates in the plurality of battery cells, and
the management device:
stores the maximum value and the minimum value, and discharge characteristics of the electricity storage device;
calculates an estimation maximum value and an estimation minimum value in the present or in the future by adding the discharge characteristics stored in the management device to the latest maximum value and the latest minimum value stored in the management device; and
outputs information based upon the calculated estimation maximum value and the calculated estimation minimum value.

### Claim 2 (depends on 1)

The construction machine management system according to claim 1, wherein the management device:
updates the discharge characteristics based upon the past maximum value and the past minimum value stored in the management device;
stores the updated discharge characteristics; and
calculates an estimation maximum value and an estimation minimum value in the present or in the future by adding the updated discharge characteristics stored in the management device to the latest maximum value and the latest minimum value stored in the management device.

### Claim 3 (depends on 2)

The construction machine management system according to claim 2, wherein the management device stores the maximum value, the minimum value and the updated discharge characteristics for each of the electricity storage devices.

### Claim 4 (depends on 1)

The construction machine management system according to claim 1, wherein the management device:
calculates a vehicle rest possible period of the hydraulic excavator that becomes a period until a restriction on use of the electricity storage device starts, based upon the estimation maximum value and the estimation minimum value in the future calculated; and
outputs information of the calculated vehicle rest possible period.

### Claim 5 (depends on 4)

The construction machine management system according to claim 4, wherein the management device outputs the calculated vehicle rest possible period or warning information based upon the calculated vehicle rest possible period to an information terminal to be used by a manager of the construction machine.