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CN119053478A - Temperature control system, work machine, and temperature control method - Google Patents

Temperature control system, work machine, and temperature control method Download PDF

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Publication number
CN119053478A
CN119053478A CN202380034452.9A CN202380034452A CN119053478A CN 119053478 A CN119053478 A CN 119053478A CN 202380034452 A CN202380034452 A CN 202380034452A CN 119053478 A CN119053478 A CN 119053478A
Authority
CN
China
Prior art keywords
battery
temperature
temperature control
remaining capacity
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202380034452.9A
Other languages
Chinese (zh)
Inventor
市丸笃志
渡边佑人
伊藤有
长仓只人
山本匡史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Publication of CN119053478A publication Critical patent/CN119053478A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The temperature control system of the present invention includes a remaining capacity acquisition unit configured to acquire a remaining capacity of a battery mounted on a work machine, a temperature acquisition unit configured to acquire a temperature of the battery, and a temperature control unit configured to control a temperature adjustment device configured to adjust the temperature of the battery based on the remaining capacity acquired by the remaining capacity acquisition unit and the temperature acquired by the temperature acquisition unit.

Description

Temperature control system, work machine, and temperature control method
Technical Field
The present disclosure relates to a temperature control system, a work machine, and a temperature control method.
Background
In the technical field of work machines, work machines such as electric forklifts and electric excavators are known which use a battery as a power source. If the battery is discharged in a state in which the temperature thereof is lowered, the battery may be deteriorated. In addition, if the temperature of the battery is lowered, the required electric power may not be extracted. Therefore, the temperature of the battery is adjusted using the temperature adjustment device so that the battery is within the recommended temperature range. Patent document 1 discloses a battery thermal insulation device for keeping a rechargeable battery mounted on an electric forklift or the like at a predetermined temperature.
Patent document 1 Japanese patent laid-open No. 2002-075469
Disclosure of Invention
In the case of using a battery as a power source of the temperature adjusting device, if the remaining capacity of the battery is small and the temperature adjusting device is still operating, the capacity of the battery required for the work machine to operate may be reduced. On the other hand, if the operation of the temperature adjustment device is stopped, it may be difficult to maintain the storage battery within the recommended temperature range.
The purpose of the present disclosure is to suppress the influence of temperature adjustment of a battery on the operation of a work machine.
According to the present disclosure, there is provided a temperature control system including a remaining capacity acquisition unit configured to acquire a remaining capacity of a battery mounted on a work machine, a temperature acquisition unit configured to acquire a temperature of the battery, and a temperature control unit configured to control a temperature adjustment device configured to adjust the temperature of the battery based on the remaining capacity acquired by the remaining capacity acquisition unit and the temperature acquired by the temperature acquisition unit.
According to the present disclosure, it is possible to suppress an influence of temperature adjustment of the battery on the operation of the work machine.
Drawings
Fig. 1 is a perspective view showing a work machine according to an embodiment.
Fig. 2 is a diagram showing a connection portion of the work machine according to the embodiment.
Fig. 3 is a block diagram showing a temperature control system according to an embodiment.
Fig. 4 is a functional block diagram showing a management controller according to an embodiment.
Fig. 5 is a flowchart showing a temperature control method according to an embodiment.
FIG. 6 is a block diagram of a computer system showing an embodiment.
Detailed Description
Embodiments of the present disclosure will be described below with reference to the drawings, but the present disclosure is not limited to the following embodiments. The constituent elements of the embodiments described below may be appropriately combined. In addition, some of the constituent elements may not be used.
Work machine
Fig. 1 is a perspective view showing a work machine 1 according to an embodiment. In the embodiment, the work machine 1 is an electric forklift using a battery as a power source.
Work machine 1 includes a vehicle body 2, a traveling device 3, a work implement 4, a battery pack 5, and a connection unit 10.
The vehicle body 2 includes a frame 2A, a housing member 2B, and a weight 2C. The housing member 2B is supported by the frame 2A. The housing member 2B is disposed at the rear of the vehicle body 2. The housing member 2B has a battery compartment in which the battery pack 5 is disposed. The weight body 2C is disposed below the housing member 2B.
The traveling device 3 supports the vehicle body 2. The traveling device 3 has front wheels 3F and rear wheels 3R.
Work implement 4 is supported by vehicle body 2. Work implement 4 includes a mast 4A supported by vehicle body 2, and a fork 4B supported by mast 4A. Work implement 4 is driven by work implement cylinder 7. The work implement cylinder 7 includes a tilt cylinder 7A that tilts the mast 4A in the front-rear direction, and a lift cylinder 7B that moves the fork 4B in the up-down direction. By driving the tilt cylinder 7A, the mast 4A is tilted in the front-rear direction, and thereby the fork 4B is tilted in the front-rear direction in a state supported by the mast 4A. The fork 4B is moved in the vertical direction in a state supported by the mast 4A by driving the lift cylinder 7B.
The battery pack 5 includes a storage battery 50. The battery pack 5 is accommodated in the accommodating member 2B. The battery 50 is a power source of the work machine 1. The battery 50 can be repeatedly charged and discharged. As an example of the secondary battery 50, a lithium ion battery is shown. In the embodiment, a plurality of battery packs 5 are mounted on work machine 1. In the embodiment, the battery pack 5 is provided with two. The battery pack 5 includes a first battery pack 5A and a second battery pack 5B.
The work machine 1 is operated by a driving operation of an operator sitting on the driving seat 8. The driver seat 8 is supported by the frame 2A. The work machine 1 has a plurality of operation members operated by an operator. As an example of the operation member, a steering wheel 9 is shown. The operator turns the traveling device 3 by operating the steering wheel 9 by hand. Further, although not shown, a throttle pedal, a brake pedal, a work implement lever, and a forward/reverse lever are shown as examples of the operation member. The operator operates the accelerator pedal with his foot to drive the running device 3. The operator operates the brake pedal with his foot to brake the running device 3. The operator operates the work implement lever by hand to actuate the work implement 4. The operator manually operates the forward/reverse lever to switch the traveling direction of the traveling device 3 between forward and reverse.
The connection unit 10 is connected to the charging device 20. The connection portion 10 is disposed at the rear of the housing member 2B. In the embodiment, a plurality of connection units 10 are provided in the work machine 1. In the embodiment, the connection portion 10 is provided with two. The connection portion 10 includes a first connection portion 10A and a second connection portion 10B.
The charging device 20 is used for charging the battery 50. The charging device 20 is disposed outside the work machine 1. Charging device 20 charges battery 50 from outside work machine 1. In the embodiment, the storage battery 50 can be charged simultaneously by a plurality of charging devices 20. In the embodiment, the secondary battery 50 can be charged simultaneously by the two charging devices 20. The plurality of charging devices 20 are connected to the plurality of connection portions 10, respectively. In the embodiment, the charging device 20 includes a first charging device 20A connected to the first connection portion 10A, and a second charging device 20B connected to the second connection portion 10B.
The charging device 20 is connected to the connection unit 10 via a cable 21 and a plug 22. The connection portion 10 includes an insertion port into which the plug 22 is inserted.
The charging device 20 has an interface device 23. The interface device 23 includes an operation device 23A operated by an operator, and a display device 23B for displaying display data. The operating device 23A includes a charge start operating portion 231, a charge stop operating portion 232, and an emergency stop operating portion 233. As examples of the charge start operation unit 231 and the charge stop operation unit 232, a toggle switch, a rocker switch, or a push button switch is shown. As an example of the emergency stop operation unit 233, a push button switch is shown. As an example of the display device 23B, a flat panel display such as a liquid crystal display or an organic Electroluminescence (EL) display is shown.
Connecting part
Fig. 2 is a diagram showing a connection unit 10 of the work machine 1 according to the embodiment. As shown in fig. 1 and 2, the work machine 1 includes a cover portion 2D that covers the connection portion 10. The first connection portion 10A and the second connection portion 10B are disposed at intervals in the vehicle width direction of the work machine 1. A power switch 51 and a work light 52 are disposed at the rear of the vehicle body 2. The power switch 51 and the work lamp 52 are disposed between the first connection portion 10A and the second connection portion 10B. As an example of the power switch 51, a momentary switch is shown. The operating lamp 52 operates based on the operating state of the battery 50. The operating state of the battery 50 includes a charged state and a discharged state. As an example, when the battery 50 is in a charged state, the operating lamp 52 blinks, and when the battery 50 is in a discharged state, the operating lamp 52 is turned on.
Temperature control system
Fig. 3 is a block diagram illustrating a temperature control system 100 according to an embodiment. The temperature control system 100 includes a battery pack 5, a charging device 20, a connection unit 10, a management controller 11, a control circuit 30, a power supply controller 12, and a main controller 13.
The battery pack 5 is mounted on the work machine 1. The battery pack 5 has a battery 50, a voltage sensor 53 for detecting the voltage of the battery 50, a temperature sensor 54 for detecting the temperature of the battery 50, a heater 55 for heating the battery 50, and a battery controller 56.
The charging device 20 is disposed outside the work machine 1. The charging device 20 includes an operation device 23A, a display device 23B, an alternating Current/Direct Current (AC/DC) conversion module 24 connected to a commercial power supply 27, a contactor 25 disposed between the commercial power supply 27 and the AC/DC conversion module 24, and a charging controller 26.
The operating device 23A includes a charge start operating portion 231 that causes the charging device 20 to perform a charging operation, a charge stop operating portion 232 that causes the charging device 20 to perform a charge stop operation, and an emergency stop operating portion 233 that causes the charging device 20 to perform an emergency stop operation.
The connection unit 10 is connected to the charging device 20. The connection portion 10 has a locking mechanism for locking the plug 22. The connection part 10 has a lock sensor 14 for detecting that the plug 22 of the charging device 20 and the connection part 10 are locked. The connection unit 10 is provided with an energizing line 15, and the energizing line 15 is energized when the plug 22 of the charging device 20 is connected to the connection unit 10. The power-on line 15 is connected to the power supply controller 12 via a detection line 16. The power supply controller 12 can determine whether the plug 22 of the charging device 20 and the connection portion 10 are connected based on the detection signal of the lock sensor 14 or the energization state of the energization line 15 acquired via the detection line 16.
The control circuit 30 includes a positive electrode line 31 connected to the positive electrode of the charging device 20 via the connection unit 10, a negative electrode line 32 connected to the negative electrode of the charging device 20 via the connection unit 10, a signal line 33 connecting the management controller 11 to the charging controller 26 via the connection unit 10, and a signal line 34 connecting the management controller 11 to the battery controller 56.
The signal line 33 includes a signal line 33A connecting the management controller 11 to the charge controller 26 of the first charging device 20A, and a signal line 33B connecting the management controller 11 to the charge controller 26 of the second charging device 20B.
The signal line 34 includes a signal line 34A connecting the management controller 11 with the battery controller 56 of the first battery pack 5A, and a signal line 34B connecting the management controller 11 with the battery controller 56 of the second battery pack 5B.
The first charging device 20A and the second charging device 20B are connected in parallel to the positive electrode line 31. The first charging device 20A and the second charging device 20B are connected in parallel to the negative electrode line 32. The first charging device 20A is connected to the positive electrode line 31 via the positive electrode line 31A. The second charging device 20B is connected to the positive electrode line 31 via the positive electrode line 31B. The first charging device 20A is connected to the negative electrode line 32 via the negative electrode line 32A. The second charging device 20B is connected to the negative electrode line 32 via the negative electrode line 32B.
The battery 50 of the first battery group 5A is connected in series with the battery 50 of the second battery group 5B. The positive electrode line 31 is connected to the positive electrode of the secondary battery 50 of the first battery pack 5A via the positive electrode line 35. The negative electrode line 32 is connected to the negative electrode of the secondary battery 50 of the second battery pack 5B via a negative electrode line 36. A fuse 35A is arranged in the positive electrode line 35.
The heater 55 of the first battery pack 5A is connected in series with the heater 55 of the second battery pack 5B. The positive electrode line 31 is connected to the positive electrode of the heater 55 of the first battery pack 5A via a positive electrode line 57. The negative electrode line 32 is connected to the negative electrode of the heater 55 of the second battery pack 5B via a negative electrode line 58.
Positive line 35 is connected to both traveling inverter 61 and work implement inverter 62 via positive line 37 and positive line 39. The negative electrode line 36 is connected to both the travel inverter 61 and the work implement inverter 62 via the negative electrode line 38 and the negative electrode line 40. The traveling inverter 61 and the work implement inverter 62 are connected in parallel to the positive electrode line 39. The travel inverter 61 is connected to the negative electrode line 40 in parallel with the work implement inverter 62.
The control circuit 30 further includes a charging contactor 41 disposed on the positive line 31. When the charging contactor 41 is turned ON (turned ON), the charging device 20 and the battery 50 are connected via the positive electrode line 31 and the positive electrode line 35, and the battery 50 is charged by the charging device 20. The charging device 20 is separated from the battery 50 by Opening (OFF) the charging contactor 41, so that the battery 50 is not charged.
In the embodiment, the charging contactor 41 includes a charging contactor 41A for switching connection and disconnection of the first charging device 20A and the battery 50, and a charging contactor 41B for switching connection and disconnection of the second charging device 20B and the battery 50. The charging contactor 41A is disposed on the positive line 31A. The charging contactor 41B is disposed on the positive line 31B. The first charging device 20A is connected to the battery 50 by turning on the charging contactor 41A, and the battery 50 is charged by the first charging device 20A. The first charging device 20A is separated from the battery 50 by opening the charging contactor 41A, so that the battery 50 is not charged by the first charging device 20A. The second charging device 20B is connected to the battery 50 by turning on the charging contactor 41B, and the battery 50 is charged by the second charging device 20B. The second charging device 20B is separated from the battery 50 by opening the charging contactor 41B, so that the battery 50 is not charged by the second charging device 20B.
The management controller 11 is connected to the charging contactor 41 via a control line 71. The control line 71 includes a control line 71A connecting the management controller 11 to the charging contactor 41A, and a control line 71B connecting the management controller 11 to the charging contactor 41B. The management controller 11 controls the charging contactor 41 via the control line 71.
The control circuit 30 further includes a discharge contactor 42 disposed on the positive line 37. When the discharge contactor 42 is turned on, both the battery 50 and the running inverter 61 and the work implement inverter 62 are connected via the positive electrode line 37 and the positive electrode line 39, and electric power is supplied to both the running inverter 61 and the work implement inverter 62 by discharging from the battery 50. By opening the discharge contactor 42, the battery 50 is separated from both the travel inverter 61 and the work implement inverter 62, and no electric power is supplied from the battery 50 to both the travel inverter 61 and the work implement inverter 62.
The management controller 11 is connected to the discharge contactor 42 via a control line 72. The management controller 11 controls the discharge contactor 42 via a control line 72.
The control circuit 30 further includes a heater contactor 43 disposed on the positive line 57. When the heater contactor 43 is turned on, at least one of the charging device 20 and the battery 50 is connected to the heater 55 via the positive line 57, and electric power is supplied to the heater 55. By opening the heater contactor 43, the charging device 20 and the battery 50 are separated from the heater 55, and no electric power is supplied to the heater 55.
The management controller 11 is connected to the heater contactor 43 via a control line 73. The management controller 11 controls the heater contactor 43 via control line 73.
In the embodiment, the detection signal of the voltage sensor 53 is transmitted from the battery controller 56 to the management controller 11 via the signal line 34. The detection signal of the temperature sensor 54 is sent from the battery controller 56 to the management controller 11 via the signal line 34.
A recommended voltage range and a recommended temperature range of the battery 50 when the battery 50 is discharged are defined. In the case where the voltage of the battery 50 is not within the recommended voltage range or in the case where the temperature of the battery 50 is not within the recommended temperature range, the management controller 11 controls the discharge contactor 42 so as not to discharge the battery 50. That is, the management controller 11 opens the discharge contactor 42 when it is determined that the voltage of the battery 50 is not within the recommended voltage range based on the detection signal of the voltage sensor 53 or when it is determined that the temperature of the battery 50 is not within the recommended temperature range based on the detection signal of the temperature sensor 54. The management controller 11 turns on the discharge contactor 42 when it is determined that the voltage of the battery 50 is within the recommended voltage range and the temperature of the battery 50 is within the recommended temperature range.
In addition, a recommended temperature range of the battery 50 when the battery 50 is charged is defined. When it is determined based on the detection signal of the temperature sensor 54 that the temperature of the battery 50 is equal to or less than a predetermined value indicating the lower limit value of the recommended temperature range, the management controller 11 controls the heater contactor 43 to supply electric power to the heater 55. The predetermined value is a preset value. By supplying electric power to the heater 55, the battery 50 is warmed by the heater 55. By the battery 50 being warmed by the heater 55, the temperature of the battery 50 rises until it is within the recommended temperature range.
The control circuit 30 includes the power supply circuit 17 of the management controller 11 and the self-holding relay 44 of the management controller 11. The positive electrode line 31 is connected to the power supply circuit 17 via the power switch 51 and the positive electrode line 45. The positive electrode line 31 is connected to the power supply circuit 17 via a latching relay 44. The negative electrode line 32 is connected to the power supply circuit 17 via a negative electrode line 46. As described above, the power switch 51 is disposed at the rear of the vehicle body 2. The operator can operate the power switch 51. When the power switch 51 is turned on, electric power is supplied to the power supply circuit 17, and the management controller 11 is started. When the power switch 51 is turned off, the power supply to the power supply circuit 17 is blocked, and the management controller 11 stops.
The management controller 11 is connected to the latching relay 44 via a control line 74. The management controller 11 controls the latching relay 44 via the control line 74. When the capacity of the battery 50 is equal to or less than a predetermined threshold value, the management controller 11 controls the latching relay 44 to interrupt the supply of electric power to the power supply circuit 17.
In addition, the control circuit 30 has a voltage sensor 47A for detecting the voltage of the positive line 31A, a voltage sensor 47B for detecting the voltage of the positive line 31B, a voltage sensor 48 for detecting the voltage of the positive line 39, and a current sensor 49 for detecting the current of the negative line 36.
The management controller 11 can determine whether or not the charging contactor 41A is malfunctioning based on the detection signal of the voltage sensor 47A. The management controller 11 can determine whether or not the charging contactor 41B is malfunctioning based on the detection signal of the voltage sensor 47B. The management controller 11 can determine whether or not the discharge contactor 42 is malfunctioning based on the detection signal of the voltage sensor 48.
The travel inverter 61 converts the direct current from the positive line 39 into three-phase alternating current, and supplies the three-phase alternating current to the travel motor 63. The travel motor 63 is driven based on the three-phase alternating current supplied from the travel inverter 61. The travel motor 63 operates the travel device 3. In the embodiment, the travel motor 63 generates power for rotating at least one of the front wheels 3F and the rear wheels 3R.
Work machine inverter 62 converts the direct current from positive line 39 into three-phase alternating current and supplies the three-phase alternating current to work machine motor 64. Work machine motor 64 is driven based on three-phase alternating current supplied by work machine inverter 62. Work motor 64 operates work machine 4. In the embodiment, the work motor 64 generates power for driving a hydraulic pump, not shown. The hydraulic oil discharged from the hydraulic pump is supplied to the work implement cylinder 7. By supplying hydraulic oil to the work implement cylinders 7, the work implement 4 operates.
The power supply controller 12 is connected to the management controller 11 via a communication line 75. The power supply controller 12 is connected to the main controller 13 via a communication line 76. The power supply controller 12 is a host controller of the management controller 11. The management controller 11 operates based on a control signal from the power supply controller 12.
The main controller 13 controls the travel inverter 61 and the work implement inverter 62 based on the operation of the operation member. The main controller 13 controls the running inverter 61 based on, for example, an operation of at least one of an accelerator pedal and a brake pedal. The main controller 13 controls the work machine inverter 62 based on the operation of the work bar.
Work machine 1 has key switch 80. The key switch 80 is disposed in at least a part of the vehicle body 2. The key switch 80 is operated by, for example, an operator sitting on the driver seat 8. When the key switch 80 is turned on, the work machine 1 becomes operable. In the following description, the key switch 80 may be turned on as turned on by a key, and the key switch 80 may be turned off as turned off by a key.
Management controller
Fig. 4 is a functional block diagram showing the management controller 11 according to the embodiment. As shown in fig. 4, the temperature control system 100 includes a management controller 11, a power supply controller 12, and a battery controller 56. The power supply controller 12 and the battery controller 56 are connected to the management controller 11, respectively. The power supply controller 12 is connected to the main controller 13, the key switch 80, and the lock sensor 14. The battery controller 56 is connected to both the voltage sensor 53 and the temperature sensor 54. The management controller 11 is used to control the heater contactor 43. The heater 55 functions as a temperature control device for controlling the temperature of the battery 50. In the embodiment, the battery 50 is used as a power source of the heater 55. The heater 55 operates based on the electric power supplied from the battery 50.
The management controller 11 includes a remaining capacity acquiring unit 11A, a temperature acquiring unit 11B, an operation determining unit 11C, a threshold storing unit 11D, a control stopping unit 11E, and a temperature controlling unit 11F.
The remaining capacity acquiring unit 11A acquires the remaining capacity of the battery 50 mounted on the work machine 1. The remaining capacity Of the battery 50 may also be regarded as a State Of Charge (SOC) Of the battery 50. The charging rate of the battery 50 is a ratio of the remaining capacity to the full charge capacity. The voltage sensor 53 detects the voltage of the battery 50. The battery controller 56 can calculate the remaining capacity of the secondary battery 50 based on the detection signal of the voltage sensor 53, for example. The remaining capacity acquiring unit 11A can acquire the remaining capacity of the secondary battery 50 from the battery controller 56.
The temperature acquisition unit 11B acquires the temperature of the battery 50 mounted on the work machine 1. The temperature of the battery 50 is detected by a temperature sensor 54. The detection signal of the temperature sensor 54 is sent to the battery controller 56. The temperature acquisition unit 11B can acquire the temperature of the battery 50 from the battery controller 56.
The work determination unit 11C determines whether the work machine 1 is in operation or in suspension. In an embodiment, the work machine 1 being in operation includes at least one of the work machine 1 being turned on by a key and the charging device 20 for charging the battery 50 being in a charging operation. The key-on of the work machine 1 includes a case where the main controller 13 is started, and at least one of the travel motor 63 and the work motor 64 is in a drivable state. The fact that work machine 1 is turned on by a key includes the fact that traveling device 3 or work implement 4 is in an operable state. The charging operation of the charging device 20 includes a case where the charging device 20 is connected to the connection portion 10 via the cable 21 and the plug 22. The charging device 20 being in the charging operation includes at least one of being in preparation for charging after the charging device 20 is connected to the connection portion 10 and before the battery 50 starts charging, being in charging after the battery 50 starts charging, and being in charging completion after the charging of the battery 50 is completed. In the charge preparation, for example, a process for diagnosing whether the charge can be appropriately started is performed.
In the embodiment, the suspension of the work machine 1 includes a case where the work machine 1 is turned off by a key and the charging device 20 is in a non-charging operation. The key-off of the work machine 1 includes a case where the main controller 13 is stopped and the travel motor 63 and the work motor 64 are not driven. The fact that work machine 1 is turned off by a key includes the fact that traveling device 3 and work implement 4 are in a state of being inoperable. The charging device 20 being in the non-charging operation includes a case where the charging device 20 is not connected to the connection portion 10.
The operation determination unit 11C can determine whether the work machine 1 is in operation or in suspension based on the operation data indicating the operation state of the work machine 1 transmitted from the power supply controller 12. The operation data includes data indicating that the key is turned on or off, data indicating that the main controller 13 is activated, and data indicating that the charging device 20 is connected to the connection unit 10. By turning on key switch 80, power controller 12 can recognize that work machine 1 is turned on by the key. By turning off key switch 80, power controller 12 can recognize that work machine 1 is turned off by the key. By causing the main controller 13 to start, the power supply controller 12 is enabled to recognize that the main controller 13 is started. As described above, the power supply controller 12 can recognize whether the charging device 20 is connected to the connection portion 10 based on the detection signal of the lock sensor 14 or the energization state of the energization line 15 acquired via the detection line 16.
The threshold value storage unit 11D is configured to store a threshold value related to the remaining capacity of the battery 50. The threshold value storage unit 11D stores a plurality of threshold values in advance. The threshold stored in the threshold storage unit 11D includes a first threshold used when the work machine 1 is determined to be in operation and a second threshold used when the work machine 1 is determined to be in suspension. The second threshold is greater than the first threshold. The threshold values (first threshold value and second threshold value) are preset values. When the remaining capacity is regarded as a charging rate, the first threshold is 5% and the second threshold is 15%, as an example.
The temperature control unit 11F controls the heater 55 for adjusting the temperature of the battery 50 based on the remaining capacity of the battery 50 acquired by the remaining capacity acquisition unit 11A and the temperature of the battery 50 acquired by the temperature acquisition unit 11B. When the temperature of the battery 50 acquired by the temperature acquisition unit 11B is equal to or lower than a predetermined value indicating the lower limit value of the recommended temperature range, the temperature control unit 11F controls the heater 55 so that the temperature of the battery 50 exceeds the predetermined value. As one example, the prescribed value is 12 ℃. The battery 50 is used as a power source for the heater 55. The heater 55 operates based on the electric power supplied from the battery 50.
In the embodiment, the temperature control unit 11F controls the heater 55 by controlling the heater contactor 43 that connects and disconnects the heater 55 to and from the battery 50. The heater 55 is controlled to be turned on and off by the temperature control portion 11F via the heater contactor 43. When the temperature of the battery 50 is equal to or lower than a predetermined value (12 ℃ or lower), the temperature control unit 11F turns on the heater contactor 43 to supply electric power from the battery 50 to the heater 55. By supplying electric power from the battery 50 to the heater 55, the battery 50 is warmed by the heater 55. When the battery 50 is warmed by the heater 55, the temperature of the battery 50 increases until the temperature exceeds a predetermined value. When the temperature of the battery 50 exceeds a predetermined value (12 ℃), the temperature control unit 11F opens the heater contactor 43 to stop the supply of electric power from the battery 50 to the heater 55. By stopping the supply of electric power from the battery 50 to the heater 55, the operation of the heater 55 is stopped. The electric power of the battery 50 is not used for the heater 55.
When the remaining capacity of the battery 50 acquired by the remaining capacity acquisition unit 11A is equal to or less than the threshold stored in the threshold storage unit 11D, the control stop unit 11E stops the control of the heater 55 by the temperature control unit 11F. The threshold value is different between when the work machine 1 is in operation and when it is in suspension. The threshold at which work machine 1 is in suspension is greater than the threshold at which work machine 1 is in operation. The threshold value at which the work machine 1 is in suspension is the second threshold value described above. The threshold value at which work machine 1 is in operation is the first threshold value. When the work machine 1 is in operation, the control stop unit 11E stops the control of the heater 55 by the temperature control unit 11F when the remaining capacity of the battery 50 is equal to or less than the first threshold (equal to or less than 5%). When the remaining capacity of the battery 50 is equal to or less than the second threshold (equal to or less than 15%) while the work machine 1 is in suspension, the control stop unit 11E stops the control of the heater 55 by the temperature control unit 11F. When the remaining capacity of the battery 50 acquired by the remaining capacity acquisition section 11A exceeds the threshold stored in the threshold storage section 11D, the control stop section 11E does not stop the control of the heater 55 by the temperature control section 11F.
That is, in the embodiment, when the remaining capacity of the battery 50 exceeds the first threshold (when 5% < SOC is equal to or less than 100%) while the work machine 1 is in operation, if the temperature of the battery 50 becomes equal to or lower than a predetermined value (equal to or lower than 12 ℃), the heater 55 is controlled to be turned on and off. That is, when the remaining capacity of the battery 50 exceeds the first threshold, if the temperature of the battery 50 becomes equal to or lower than a predetermined value, the battery 50 is warmed. When the remaining capacity of the battery 50 is equal to or less than the first threshold (SOC is equal to or less than 5%), the heater 55 does not operate even when the temperature of the battery 50 is equal to or less than a predetermined value. That is, when the remaining capacity of the battery 50 is equal to or less than the first threshold value, the battery 50 is not warmed even if the temperature of the battery 50 is equal to or less than the predetermined value.
When the remaining capacity of the battery 50 exceeds the second threshold (15% < SOC. Ltoreq.100%) while the working machine 1 is in suspension, if the temperature of the battery 50 becomes equal to or lower than a predetermined value (12 ℃ or lower), the heater 55 is controlled to be turned on and off. That is, when the remaining capacity of the battery 50 exceeds the second threshold, if the temperature of the battery 50 becomes equal to or lower than the predetermined value, the battery 50 is warmed. When the remaining capacity of the battery 50 is equal to or less than the second threshold (SOC is equal to or less than 15%), the heater 55 does not operate even when the temperature of the battery 50 is equal to or less than a predetermined value. That is, when the remaining capacity of the battery 50 is equal to or less than the second threshold value, the battery 50 is not warmed even if the temperature of the battery 50 is equal to or less than the predetermined value.
That is, when work machine 1 is in operation, battery 50 is maintained within the recommended temperature range immediately before the remaining capacity of battery 50 is depleted. Thus, the required electric power can be extracted from the battery 50 immediately before the remaining capacity of the battery 50 is exhausted. In addition, as described above, in the case where the temperature of the battery 50 is not within the recommended temperature range, the management controller 11 opens the discharge contactor 42 so as not to discharge the battery 50. When work machine 1 is in operation, battery 50 is maintained within the recommended temperature range immediately before the remaining capacity of battery 50 is depleted, so that discharge contactor 42 is continuously turned on. Therefore, the electric power of battery 50 contributes to the operation of work machine 1. When the work machine 1 is in operation, there is a high possibility that an operator is mounted on the work machine 1 or in the vicinity of the work machine 1. Therefore, even if the heater 55 consumes the electric power of the battery 50 immediately before the remaining capacity of the battery 50 is exhausted, the operator may perform the operation of charging the battery 50 by the charging device 20.
When the work machine 1 is in a halt, even if the heater 55 consumes the electric power of the battery 50, the remaining capacity of the battery 50 does not become equal to or smaller than the second threshold value. When the work machine 1 is shifted from the suspended state to the operating state, at least the remaining capacity corresponding to the second threshold value exists in the battery 50, so that it is possible to suppress the work machine 1 from being obstructed. In addition, even if the working machine 1 is in suspension, when the remaining capacity of the battery 50 exceeds the second threshold value, the battery 50 is adjusted to be within the recommended temperature range. Therefore, immediately after the work machine 1 is shifted from the suspension to the operation, the battery 50 is highly likely to be in the recommended temperature range. Therefore, immediately after the work machine 1 is shifted from the suspension to the operation, the required electric power can be extracted from the battery 50. Therefore, the work machine 1 can be prevented from being obstructed.
Temperature control method
Next, a temperature control method according to an embodiment will be described. Fig. 5 is a flowchart showing a temperature control method according to an embodiment.
The work determination unit 11C acquires work data indicating the operation state of the work machine 1 from the power supply controller 12 (step S1).
The remaining capacity acquiring unit 11A acquires the remaining capacity of the secondary battery 50 from the battery controller 56 (step S2).
The work determination unit 11C determines whether the work machine 1 is in operation or in suspension based on the work data acquired in step S1 (step S3).
When it is determined in step S3 that the work machine 1 is in operation (yes in step S3), the control stop unit 11E determines whether or not the remaining capacity of the battery 50 acquired in step S2 is equal to or smaller than the first threshold value (step S4).
When it is determined in step S4 that the remaining capacity of the battery 50 is equal to or less than the first threshold (yes in step S4), the control stop unit 11E stops the control of the heater 55 by the temperature control unit 11F (step S5). Thus, even if the temperature of the battery 50 is equal to or lower than a predetermined value (12 ℃ or lower), the battery 50 is not warmed.
When it is determined in step S4 that the remaining capacity of the battery 50 exceeds the first threshold (step S4: no), the temperature acquisition unit 11B acquires the temperature of the battery 50 from the battery controller 56 (step S6).
The temperature control unit 11F determines whether or not the temperature acquired in step S6 is equal to or lower than a predetermined value (step S7).
When it is determined in step S7 that the temperature of the battery 50 is equal to or lower than the predetermined value (yes in step S7), the temperature control unit 11F turns on the heater contactor 43 (step S8). Thereby, electric power is supplied from the battery 50 to the heater 55. The battery 50 is warmed by the heater 55.
When it is determined in step S7 that the temperature of the battery 50 exceeds the predetermined value (step S7: no), the temperature control unit 11F turns off the heater contactor 43 (step S9). Thereby, the heater 55 does not operate. The heater 55 does not consume the electric power of the battery 50.
When it is determined in step S3 that the work machine 1 is in suspension (no in step S3), the control stop unit 11E determines whether or not the remaining capacity of the battery 50 acquired in step S2 is equal to or less than the second threshold value (step S10).
When it is determined in step S10 that the remaining capacity of the battery 50 is equal to or less than the second threshold (yes in step S10), the control stop unit 11E stops the control of the heater 55 by the temperature control unit 11F (step S5).
When it is determined in step S10 that the remaining capacity of the battery 50 exceeds the second threshold (step S10: no), the temperature acquisition unit 11B acquires the temperature of the battery 50 from the battery controller 56 (step S6).
After the process of step S6, the process of step S7 and either of the processes of step S8 and step S9 are performed.
Computer system
Fig. 6 is a block diagram of a computer system 1000 that represents an embodiment. The management controller 11, the power supply controller 12, the main controller 13, the charge controller 26, and the battery controller 56 all include a computer system 1000. The computer system 1000 has a processor 1001 such as a central processing unit (CPU: central Processing Unit), a main Memory 1002 including a nonvolatile Memory such as a Read Only Memory (ROM) and a volatile Memory such as a random access Memory (RAM: random Access Memory), a Memory 1003, and an interface 1004 including an input-output circuit. The functions of the management controller 11, the power supply controller 12, the main controller 13, the charge controller 26, and the battery controller 56 are stored in the memory 1003 in the form of computer programs. The processor 1001 reads out a computer program from the memory 1003, and expands the computer program into the main memory 1002, and executes the above processing according to the program. Furthermore, the computer program may also be distributed to the computer system 1000 via a network.
The computer program or the computer system 1000 can perform operations according to the above embodiment, such as acquiring the remaining capacity of the battery 50 mounted on the work machine 1, acquiring the temperature of the battery 50, and controlling the heater 55 for adjusting the temperature of the battery 50 based on the remaining capacity of the battery 50 and the temperature of the battery 50.
Effects of
As described above, the temperature control system 100 according to the embodiment includes the remaining capacity acquisition unit 11A for acquiring the remaining capacity of the battery 50 mounted on the work machine 1, the temperature acquisition unit 11B for acquiring the temperature of the battery 50, and the temperature control unit 11F for controlling the heater 55 for adjusting the temperature of the battery 50 based on the remaining capacity of the battery 50 acquired by the remaining capacity acquisition unit 11A and the temperature of the battery 50 acquired by the temperature acquisition unit 11B.
According to the embodiment, the temperature control unit 11F can control the heater 55 so that the battery 50 is within the recommended temperature range based on the temperature of the battery 50 acquired by the temperature acquisition unit 11B. Further, the temperature control unit 11F can adjust the power consumption of the heater 55 on the battery 50 based on the remaining capacity of the battery 50 acquired by the remaining capacity acquisition unit 11A so that the remaining capacity of the battery 50 maintains an appropriate value. Therefore, the temperature adjustment of the battery 50 by the heater 55 can be suppressed from affecting the operation of the work machine 1.
In the embodiment, the work determination unit 11C determines whether the work machine 1 is in operation or in suspension. Based on the determination result of the operation determination unit 11C, a threshold value related to the remaining capacity of the battery 50 is determined as either one of the first threshold value or the second threshold value. When the remaining capacity of the battery 50 is equal to or less than the threshold value, the temperature adjustment of the battery 50 by the heater 55 is stopped. That is, when the remaining capacity of the battery 50 is equal to or less than the threshold value, the heater 55 does not consume the electric power of the battery 50. Therefore, the temperature adjustment of the battery 50 by the heater 55 can be suppressed from affecting the operation of the work machine 1.
If the remaining capacity of the battery 50 exceeds the first threshold value while the work machine 1 is in operation, the battery 50 is maintained within the recommended temperature range. Thus, the required electric power can be extracted from the battery 50 immediately before the remaining capacity of the battery 50 is exhausted. That is, when work machine 1 is in operation, the electric power of battery 50 contributes to the operation of work machine 1 immediately before the remaining capacity of battery 50 is exhausted. When the work machine 1 is in a halt, even if the heater 55 consumes the electric power of the battery 50, the remaining capacity of the battery 50 does not become equal to or smaller than the second threshold value. When the work machine 1 is shifted from the suspended state to the operating state, since at least the remaining capacity corresponding to the second threshold value exists in the battery 50, it is possible to suppress the work machine 1 from being obstructed. In addition, even if the working machine 1 is in suspension, when the remaining capacity of the battery 50 exceeds the second threshold value, the battery 50 is adjusted to be within the recommended temperature range. Therefore, even immediately after the work machine 1 is shifted from the suspended state to the in-operation state, the battery 50 is highly likely to be in the recommended temperature range. Therefore, immediately after the work machine 1 is shifted from the suspension to the operation, the required electric power can be extracted from the battery 50. Therefore, the work machine 1 can be prevented from being obstructed.
Other embodiments
In the above embodiment, the temperature adjusting device for adjusting the temperature of the battery 50 is the heater 55 for heating the battery 50. However, the temperature control device for controlling the temperature of the battery 50 may be a cooler for cooling the battery 50. When the temperature of the battery 50 is equal to or higher than the recommended temperature range, the battery 50 may be cooled by a cooler.
In the above embodiment, the work machine 1 is an electric forklift. However, the work machine 1 may be an electric excavator, an electric wheel loader, an electric dump truck, an electric bulldozer, or the like. The components described in the above embodiments can be applied to a working machine using a battery as a power source.
Symbol description
Work machine, 2..bodywork, 2 a..frame, 2 b..storage member, 2 c..counterweight, 2 d..hood, 3..running gear, 3 f..front wheel, 3 r..rear wheel, 4..working machine, 4 a..portal, 4 b..cargo fork, 5..battery, 5 a..first battery, 5 b..second battery, 7..working machine cylinder, 7 a..tilting cylinder, 7 b..lifting cylinder, 8..working machine seat, 9..steering wheel, 10..connecting portion, 10 a..first connecting portion, 10 b..second connecting portion, 10 b..first connecting portion, second connecting portion, third battery, fourth battery, third battery, and fourth battery A management controller, 11 a..left capacity acquisition unit, 11 b..temperature acquisition unit, 11 c..work determination unit, 11 d..threshold value storage unit, 11 e..control stop unit, 11 f..temperature control unit, 12..power supply controller, 13..main controller, 14..lock sensor, 15..lead wire, 16..detection line, 17..power supply circuit, 20..charging device, 20 a..first charging device, 20 b..second charging device, 21..cable, 22..plug, 23..interface device, and the like The operation device, 23A, 23B, the display device, 24, the AC/DC conversion module, 25, the contactor, 26, the charge controller, 27, the commercial power supply, 30, the control circuit, 31, the positive pole line, 31A, the positive pole line, 31B, the positive pole line, 32, the negative pole line, 32A, the negative pole line, 32B, the negative pole line, 33, the signal line, 33A, the signal line, 33B, the signal line, 34A, the signal line, 34B, the positive pole line A fuse, 36, a negative electrode, 37, a positive electrode, 38, a negative electrode, 39, a positive electrode, 49, a negative electrode, 41, a charging contactor, 41A, a charging contactor, 41B, a charging contactor, 42, a discharging contactor, 43, a heater contactor, 44, a self-holding relay, 45, a positive electrode, 46, a negative electrode, 47A, a voltage sensor, 47, a voltage sensor, 48, a current sensor, 50, a battery, 51, a power switch The operation lamp, the voltage sensor, the 54 th temperature sensor, the 55 th temperature sensor, the heater (temperature adjusting device), the 56 th battery controller, the 57 th positive electrode wire, the 58 th negative electrode wire, the 61 th driving inverter, the 62 th working machine inverter, the 63 th driving motor, the 64 th working machine motor, the 71 th control wire, the 71A th control wire, the 71B th control wire, the 72 th control wire, the 73 th control wire, the 74 th control wire, the 75 th communication wire, the 76 th communication wire, the 80 th key switch 100..temperature control system, 231..charging start operation unit, 232..charging stop operation unit, 233..emergency stop operation unit computer system 1001. a processor 1001. A processor(s).

Claims (12)

1.一种温度控制系统，其特征在于，具备：1. A temperature control system, characterized by comprising: 剩余容量获取部，其用于获取搭载于作业机械的蓄电池的剩余容量；a remaining capacity acquisition unit for acquiring the remaining capacity of a storage battery mounted on the working machine; 温度获取部，其用于获取所述蓄电池的温度；以及a temperature acquisition unit, configured to acquire the temperature of the battery; and 温度控制部，其基于由所述剩余容量获取部获取的所述剩余容量及由所述温度获取部获取的所述温度，对用于调整所述蓄电池的温度的调温装置进行控制。A temperature control unit controls a temperature adjustment device for adjusting the temperature of the storage battery based on the remaining capacity acquired by the remaining capacity acquisition unit and the temperature acquired by the temperature acquisition unit. 2.根据权利要求1所述的温度控制系统，其特征在于，具备：2. The temperature control system according to claim 1, characterized in that it comprises: 控制停止部，其在由所述剩余容量获取部获取的所述剩余容量为与所述剩余容量相关的阈值以下时，使所述温度控制部对所述调温装置的控制停止。A control stopping unit is configured to stop the temperature control unit from controlling the temperature regulating device when the remaining capacity acquired by the remaining capacity acquiring unit is equal to or smaller than a threshold value related to the remaining capacity. 3.根据权利要求2所述的温度控制系统，其特征在于，3. The temperature control system according to claim 2, characterized in that: 所述作业机械在处于工作中与处于暂停中，所述阈值是不同的。The threshold value is different when the working machine is in operation and when the working machine is stopped. 4.根据权利要求3所述的温度控制系统，其特征在于，4. The temperature control system according to claim 3, characterized in that: 所述作业机械处于暂停中的所述阈值大于所述作业机械处于工作中的所述阈值。The threshold value indicating that the working machine is at rest is greater than the threshold value indicating that the working machine is in operation. 5.根据权利要求2所述的温度控制系统，其特征在于，具备：5. The temperature control system according to claim 2, characterized in that it comprises: 阈值存储部，其存储所述阈值。A threshold storage unit stores the threshold. 6.根据权利要求5所述的温度控制系统，其特征在于，6. The temperature control system according to claim 5, characterized in that: 在所述阈值存储部预先存储有多个阈值。The threshold storage unit stores a plurality of thresholds in advance. 7.根据权利要求3所述的温度控制系统，其特征在于，具备：7. The temperature control system according to claim 3, characterized in that it comprises: 工作判定部，其用于判定所述作业机械是处于工作中还是处于暂停中。The operation determination unit is used to determine whether the working machine is in operation or in a standstill. 8.根据权利要求3所述的温度控制系统，其特征在于，8. The temperature control system according to claim 3, characterized in that: 所述调温装置包括对所述蓄电池进行加温的加热器，The temperature regulating device includes a heater for heating the battery. 在由所述温度获取部获取的所述温度为规定值以下时，所述温度控制部控制所述调温装置，以使所述蓄电池的温度超过规定值。When the temperature acquired by the temperature acquisition unit is equal to or lower than a predetermined value, the temperature control unit controls the temperature regulation device so that the temperature of the storage battery exceeds a predetermined value. 9.根据权利要求3所述的温度控制系统，其特征在于，9. The temperature control system according to claim 3, characterized in that: 所述工作中包括以下情况中的至少一种：所述作业机械被钥匙开启、及用于对所述蓄电池进行充电的充电装置处于充电动作中，The operation includes at least one of the following situations: the working machine is turned on by a key, and the charging device for charging the battery is in charging operation, 所述暂停中包括以下情况：所述作业机械被钥匙关闭、及所述充电装置处于非充电动作中。The pause includes the following situations: the working machine is turned off by a key, and the charging device is in a non-charging operation. 10.根据权利要求3所述的温度控制系统，其特征在于，10. The temperature control system according to claim 3, characterized in that: 所述工作中包括以下情况中的至少一种：所述作业机械的行驶装置或作业机处于能够动作的状态、及用于对所述蓄电池进行充电的充电装置处于充电动作中，The operation includes at least one of the following situations: the travel device or the working machine of the working machine is in an operable state, and the charging device for charging the battery is in a charging operation, 所述暂停中包括以下情况：所述作业机械的行驶装置和作业机处于无法动作的状态、及所述充电装置处于非充电动作中。The pause includes a situation where the travel device and the work machine of the work machine are in an inoperable state, and the charging device is in a non-charging operation. 11.一种作业机械，其特征在于，具备：11. A working machine, characterized by comprising: 权利要求1所述的温度控制系统。The temperature control system of claim 1. 12.一种温度控制方法，其特征在于，包括：12. A temperature control method, comprising: 获取搭载于作业机械的蓄电池的剩余容量；Obtaining the remaining capacity of a battery mounted on a working machine; 获取所述蓄电池的温度；以及obtaining the temperature of the battery; and 基于所述剩余容量及所述温度，控制用于调整所述蓄电池的温度的调温装置。A temperature regulating device for regulating the temperature of the battery is controlled based on the remaining capacity and the temperature.
CN202380034452.9A 2022-08-31 2023-08-29 Temperature control system, work machine, and temperature control method Pending CN119053478A (en)

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PCT/JP2023/031096 WO2024048547A1 (en) 2022-08-31 2023-08-29 Temperature control system, work machine, and temperature control method

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