CN113309764A - Pure electric engineering machinery heat dissipation system and control method - Google Patents

Pure electric engineering machinery heat dissipation system and control method Download PDF

Info

Publication number
CN113309764A
CN113309764A CN202110425109.XA CN202110425109A CN113309764A CN 113309764 A CN113309764 A CN 113309764A CN 202110425109 A CN202110425109 A CN 202110425109A CN 113309764 A CN113309764 A CN 113309764A
Authority
CN
China
Prior art keywords
inlet
water pump
water valve
motor
channel
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
CN202110425109.XA
Other languages
Chinese (zh)
Inventor
郄松涛
张卫东
刘志明
李莺莺
段佳慧
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.)
Tianjin Research Institute Of Construction Machinery Co ltd
Original Assignee
Tianjin Research Institute Of Construction Machinery Co 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 Tianjin Research Institute Of Construction Machinery Co ltd filed Critical Tianjin Research Institute Of Construction Machinery Co ltd
Priority to CN202110425109.XA priority Critical patent/CN113309764A/en
Publication of CN113309764A publication Critical patent/CN113309764A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • H01M10/62—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
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • 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
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Analytical Chemistry (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a pure electric engineering machinery heat dissipation system and a control method, belonging to the technical field of electric engineering machinery.A water cooling heat dissipation system comprises a cooling liquid radiator, a first circulation pipeline communicated with an inlet and an outlet of the cooling liquid radiator, a first water pump and an electromagnetic water valve which are arranged on the first circulation pipeline, and a first temperature sensor for monitoring the temperature of parts; the hydraulic oil cooling system comprises a hydraulic oil radiator and a hydraulic oil temperature sensor for monitoring the temperature of hydraulic oil; the power battery cooling system comprises a plate heat exchanger for exchanging heat with the power battery, a second circulating pipeline communicated with an inlet and an outlet of the plate heat exchanger, a second water pump installed on the second circulating pipeline, and a second temperature sensor for monitoring the outlet temperature of the plate heat exchanger; and the vehicle control unit is respectively in data interaction with the first temperature sensor, the hydraulic oil temperature sensor, the second temperature sensor, the first water pump, the electromagnetic water valve, the electric fan and the second water pump.

Description

Pure electric engineering machinery heat dissipation system and control method
Technical Field
The invention belongs to the technical field of electric engineering machinery, and particularly relates to a pure electric engineering machinery heat dissipation system and a control method.
Background
In recent years, with the rapid development of science and technology, the energy problem is becoming more serious, and due to the increasingly prominent energy environmental problem and the severe reality of high oil consumption and poor emission of engineering machinery, the future development trend of the traditional engineering machinery equipment taking fuel as power is bound to be the core target of energy conservation and emission reduction. Based on the above, various large engineering machinery manufacturers develop engineering machinery products based on electric drive hybrid power, electric auxiliary drive and pure electric drive. Among them, the application of pure electric technology to engineering machinery products becomes a hot spot of concern for engineering machinery manufacturers at home and abroad due to the advantages of zero emission, low noise and low use cost.
Some manufacturers of the developed pure electric engineering mechanical heat dissipation systems adopt a mode that all elements needing heat dissipation, such as a motor, a motor controller and a power battery, are arranged in series, so that a radiator needs to be designed according to a working condition with the largest heat productivity, the size of the radiator is too large, and parts with low heat dissipation power are wasted. Some manufacturers adopt a centralized arrangement mode of a power battery heat dissipation system, and the heat dissipation module is too large in size, difficult to arrange and incapable of being applied to small vehicles. The hydraulic oil radiator and the cooling liquid radiator are usually arranged in a single-layer parallel connection mode or a double-layer series connection mode, and energy loss is caused by cooling through one fan, the rotating speed of a cooling water pump cannot be adjusted, and the like.
Disclosure of Invention
The invention provides a pure electric engineering machinery heat dissipation system and a control method for solving the technical problems in the prior art, and aims to solve the problem of large energy consumption caused by overlarge size, inconvenient arrangement and other defects of a heat radiator of the traditional pure electric engineering machinery.
The invention provides a pure electric engineering machinery heat dissipation system, which comprises:
the water-cooling heat dissipation system comprises a cooling liquid radiator for performing heat exchange with the part, a first circulating pipeline communicated with an inlet and an outlet of the cooling liquid radiator, a first water pump and an electromagnetic water valve which are arranged on the first circulating pipeline, and a first temperature sensor for monitoring temperature information of the part;
the hydraulic oil cooling system is used for cooling hydraulic oil and comprises a hydraulic oil radiator and a hydraulic oil temperature sensor used for monitoring the temperature information of the hydraulic oil;
the power battery heat dissipation system is used for dissipating heat for the power battery and comprises a plate heat exchanger for exchanging heat with the power battery, a second circulation pipeline communicated with an inlet and an outlet of the plate heat exchanger, a second water pump installed on the second circulation pipeline and a second temperature sensor used for monitoring the outlet temperature of the plate heat exchanger;
and the vehicle control unit is used for receiving data signals of the first temperature sensor, the hydraulic oil temperature sensor and the second temperature sensor and controlling the working states of the first water pump, the electromagnetic water valve, the electric fan and the second water pump.
Preferably, the water-cooled heat dissipation system further comprises an expansion tank connected with an inlet of the cooling liquid radiator.
Preferably, a liquid level sensor is mounted on the expansion tank.
Preferably, an electric fan is arranged on the cooling liquid radiator.
Preferably, an electric fan is arranged on the hydraulic oil radiator.
Preferably, the power battery heat dissipation system further comprises an expansion valve connected with an inlet of the plate heat exchanger, an electric compressor connected with an outlet of the plate heat exchanger, and a condenser connected with an inlet of the expansion valve, wherein an outlet of the electric compressor is connected with an inlet of the condenser.
Preferably, an electric fan is arranged on the condenser.
Preferably, the parts comprise an oil pump motor, a walking motor and a four-in-one controller, wherein the walking motor is connected with the four-in-one controller in series, an inlet of the electromagnetic water valve is connected with an outlet of the first water pump, the electromagnetic water valve comprises two outlets, and the two outlets are respectively connected with inlets of the oil pump motor and the walking motor; the electromagnetic water valve comprises two paths of independently adjustable channels, and the outlet of the oil pump motor is converged with the cooling liquid at the outlet of the four-in-one controller and then connected with the inlet of the cooling liquid radiator; the outlet of the cooling liquid radiator is connected with the inlet of the water pump.
Preferably, temperature sensor is installed to the oil pump motor, and temperature sensor is installed to the walking motor, and temperature sensor is installed to four unification controllers, temperature sensor is installed to coolant liquid radiator exit position, vehicle control unit carries out data interaction with four sensors.
The second purpose of the invention is to provide a control method of a pure electric engineering mechanical heat dissipation system, which comprises the following steps:
the vehicle control unit acquires data of each sensor and executes the following actions through control logic:
A) when T is0<min(T10,T20,T30)，T1<T10，T2<T20，T3<T30When the cooling liquid cooling system defaults to natural cooling, namely the water pump 1 works at the lowest rotating speed, the electric fan 1 stops, and when each branch T is connected1、T2、T3When any one of the three temperatures is close to the alarm value, the electric fan 1 is started, and the rotating speed n of the electric fan 1f1Gradually increased to the maximum speed nf1MaxOtherwise, restoring the default value;
B) when T is0<min(T10,T20,T30)，T1>T10，T2<T20，T3<T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor is set to be the maximum, the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be the minimum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
C) when T is0<min(T10,T20,T30)，T1>T10，T2>T20，T3<T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
D) when T is0<min(T10,T20,T30)，T1>T10，T2<T20，T3>T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
E) when T is0<min(T10,T20,T30)，T1>T10，T2>T20，T3>T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
F) when T is0<min(T10,T20,T30)，T1<T10，T2>T20，T3<T30When the water pump is used, a channel 1 from an inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
G) when T is0<min(T10,T20,T30)，T1<T10，T2>T20，T3>T30When the water pump is used, a channel 1 from an inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
H) when T is0<min(T10,T20,T30)，T1<T10，T2<T20，T3>T30When the water pump is used, a channel 1 from an inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
I) when T is0≥min(T10,T20,T30) When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxIf the time of Ns, T0Is always more than or equal to min (T)10,T20,T30) The controller can prompt an alarm and carry out speed-limiting and torque-limiting operation on the motor, otherwise, the motor is recovered to A-H;
J) in the hydraulic oil heat-dissipating system, the rotating speed n of the electric fan 2f2The VCU of the vehicle control unit realizes speed change control and energy conservation and emission reduction, and when the VCU is used as Thy<Thy0When the fan 2 stops working; when T ishy0≤Thy≤ThymaxAt 2 n speeds of the electric fanf2Gradually increasing the speed to nf2Max. When lasting for the time of Ns, Thy≥ThymaxAnd when the speed is limited, the controller can prompt an alarm and carry out speed limiting operation on the oil pump motor.
K) In the power battery heat dissipation system, the rotating speed n of the electric fan 3f3The VCU of the vehicle control unit realizes speed change control and energy conservation and emission reduction, and when the VCU is used as Tce<Tce0When the fan is started, the fan 3 stops working; when T isce0≤Thy≤TcemaxAt 3 rpm n of the electric fanf3Gradually increasing the speed to nf3MaxSpeed n of the water pump 22Gradually increased to the maximum speed n2Max. When lasting for the time of Ns, Tce≥TcemaxAnd when the power battery is used, the controller can prompt an alarm and send an instruction to the BMS system to reduce the output power of the power battery.
In A-K, T0Outlet temperature, T, of coolant radiator10Oil pump motor alarm temperature, T20Alarm temperature, T, of walking motor30Four-in-one controller for alarming temperature Thy0Hydraulic oil temperature alarm temperature, ThymaxHydraulic oil temperature limit, Tce0Alarm temperature, T, of power batterycemax: a power battery temperature limit.
Preferably, the range of N in serial number I, J, K is generally set to 5-10.
The invention has the advantages and positive effects that:
1. in the application, each heat dissipation system is independently controlled, and parts needing heat dissipation adopt a series/parallel connection mode according to the required heat dissipation flow, so that the size of the heat radiator is effectively reduced, and the space is saved;
2. the dual-channel electromagnetic water valve is adopted, 2 channels can be independently controlled, the opening degree of the channels is adjusted in real time according to the temperature of the motor and the temperature of the controller, the energy consumption is effectively reduced, and the cruising ability of the whole vehicle is improved;
3. according to the invention, the PWM water pump and the electric fan with adjustable rotating speed are adopted, the specific rotating speed is adjusted by the vehicle controller in real time according to the working condition, and energy conservation and emission reduction are realized;
4. all elements of the power battery cooling system can be distributed according to the space of the whole vehicle, so that the space utilization rate is improved.
Drawings
FIG. 1 is a block circuit diagram of a preferred embodiment of the present invention;
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
in the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, the technical solution of the present invention is:
a pure electric engineering machinery heat dissipation system comprises a water cooling heat dissipation system, a hydraulic oil heat dissipation system and a power battery heat dissipation system. The water-cooling heat dissipation system comprises a water pump, an electromagnetic water valve, parts needing heat dissipation and a cooling liquid radiator, wherein the parts needing heat dissipation are connected in parallel or in series, the cooling liquid radiator is connected with an expansion water tank and used for offsetting volume change caused by expansion and contraction of cooling liquid and serving as a filling port of the cooling liquid, a liquid level sensor is installed on the expansion water tank, an electric fan is arranged on the cooling liquid radiator, and temperature sensors are installed inside the parts needing heat dissipation; the hydraulic oil cooling system comprises a hydraulic oil radiator ThyThe hydraulic oil radiator is provided with an electric fan and is provided with a hydraulic oil temperature sensor Thy(ii) a The power battery heat dissipation system comprises a water pump, a power battery, a plate heat exchanger, an electric compressor, a condenser and an expansion valve, wherein an electric fan is arranged on the condenser, and a temperature sensor T is mounted at the outlet of the plate heat exchangerce。
The VCU of the vehicle controller collects temperature values of the temperature sensors, and the VCU respectively controls the water pumps, the electric fans and the electromagnetic water valves of the systems after logical operation of the controller.
Required radiating spare part contains oil pump motor, walking motor, four unification controllers, and wherein walking motor and four unification controllers establish ties, electromagnetism water valve entry and water pump exit linkage, the electromagnetism water valve includes 2 exports, respectively with the entry linkage of oil pump motor and walking motor. The inside 2 ways of passageways that contain of battery water valve, every way passageway aperture all can be through automatically controlled regulation. And the outlet of the oil pump motor is connected with the inlet of the cooling liquid radiator after the cooling liquid at the outlet of the four-in-one controller is converged. The outlet of the cooling liquid radiator is connected with the inlet of the water pump.
The oil pump motor is provided with a temperature sensor T1The walking motor is provided with a temperature sensor T2The four-in-one controller is provided with a temperature sensor T3A temperature sensor T is arranged at the outlet position of the cooling liquid radiator0An electric fan 1 is arranged on the cooling liquid radiator, an electric fan 2 is arranged on the hydraulic oil radiator, and an electric fan 3 is arranged on the condenser.
The cooling liquid radiator and the hydraulic oil radiator can be arranged in a centralized and parallel mode or can be arranged independently according to the arrangement condition of the whole vehicle.
Each system water pump comprises a water cooling system water pump 1 and a power battery cooling system water pump 2.
A control method of a pure electric engineering machinery heat dissipation system comprises the following steps:
the vehicle control unit acquires data of each sensor and executes the following actions through control logic:
A) when T is0<min(T10,T20,T30)，T1<T10，T2<T20，T3<T30When the cooling liquid cooling system defaults to natural cooling, namely the water pump 1 works at the lowest rotating speed, the electric fan 1 stops, and when each branch T is connected1、T2、T3When any one of the three temperatures is close to the alarm value, the electric fan 1 is started, and the rotating speed n of the electric fan 1f1Gradually increased to the maximum speed nf1MaxOtherwise, restoring the default value;
B) when T is0<min(T10,T20,T30)，T1>T10，T2<T20，T3<T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor is set to be the maximum, the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be the minimum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
C) when T is0<min(T10,T20,T30)，T1>T10，T2>T20，T3<T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
D) when T is0<min(T10,T20,T30)，T1>T10，T2<T20，T3>T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
E) when T is0<min(T10,T20,T30)，T1>T10，T2>T20，T3>T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
F) when T is0<min(T10,T20,T30)，T1<T10，T2>T20，T3<T30When the electromagnetic water valve is used, the channel 1 from the inlet of the electromagnetic water valve to the walking motor is set to be the minimum opening, and the channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be the maximum openingOpening, speed n of water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
G) when T is0<min(T10,T20,T30)，T1<T10，T2>T20，T3>T30When the water pump is used, a channel 1 from an inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
H) when T is0<min(T10,T20,T30)，T1<T10，T2<T20，T3>T30When the water pump is used, a channel 1 from the inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump1Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
I) when T is0≥min(T10,T20,T30) When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxIf the time of Ns, T0Is always more than or equal to min (T)10,T20,T30) The controller can prompt an alarm and carry out speed-limiting and torque-limiting operation on the motor, otherwise, the motor is recovered to A-H;
J) in the hydraulic oil heat-dissipating system, the rotating speed n of the electric fan 2f2The VCU of the vehicle control unit realizes speed change control and energy conservation and emission reduction, and when the VCU is used as Thy<Thy0When the fan 2 stops working; when T ishy0≤Thy≤ThymaxAt 2 n speeds of the electric fanf2Gradually increasing the speed to nf2Max. When lasting for the time of Ns, Thy≥ThymaxAnd when the speed is limited, the controller can prompt an alarm and carry out speed limiting operation on the oil pump motor.
K) Power battery cooling systemIn the middle, the rotating speed n of the electric fan 3f3The VCU of the vehicle control unit realizes speed change control and energy conservation and emission reduction, and when the VCU is used as Tce<Tce0When the fan is started, the fan 3 stops working; when T isce0≤Thy≤TcemaxAt 3 rpm n of the electric fanf3Gradually increasing the speed to nf3MaxSpeed n of the water pump 22Gradually increased to the maximum speed n2Max. When lasting for the time of Ns, Tce≥TcemaxAnd when the power battery is used, the controller can prompt an alarm and send an instruction to the BMS system to reduce the output power of the power battery.
The range of N in serial number I, J, K is typically set to 5-10.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a pure electric engineering machinery cooling system which characterized in that includes:
the water-cooling heat dissipation system comprises a cooling liquid radiator for performing heat exchange with the part, a first circulating pipeline communicated with an inlet and an outlet of the cooling liquid radiator, a first water pump and an electromagnetic water valve which are arranged on the first circulating pipeline, and a first temperature sensor for monitoring temperature information of the part;
the hydraulic oil cooling system is used for cooling hydraulic oil and comprises a hydraulic oil radiator and a hydraulic oil temperature sensor used for monitoring the temperature information of the hydraulic oil;
the power battery heat dissipation system is used for dissipating heat for the power battery and comprises a plate heat exchanger for exchanging heat with the power battery, a second circulation pipeline communicated with an inlet and an outlet of the plate heat exchanger, a second water pump installed on the second circulation pipeline and a second temperature sensor used for monitoring the outlet temperature of the plate heat exchanger;
and the vehicle control unit is used for receiving data signals of the first temperature sensor, the hydraulic oil temperature sensor and the second temperature sensor and controlling the working states of the first water pump, the electromagnetic water valve, the electric fan and the second water pump.
2. The purely electrical engineering mechanical heat dissipation system of claim 1, further comprising an expansion tank connected to an inlet of the coolant radiator.
3. The purely electric engineering mechanical heat dissipation system as recited in claim 2, wherein a liquid level sensor is mounted on the expansion tank.
4. A purely electrical engineering mechanical heat dissipation system as claimed in claim 3, wherein an electric fan is provided on the coolant radiator.
5. A pure electric engineering machinery heat dissipation system as claimed in claim 1, wherein an electric fan is disposed on the hydraulic oil radiator.
6. The purely electric engineering machinery heat dissipation system of claim 1, wherein the power battery heat dissipation system further comprises an expansion valve connected with an inlet of the plate heat exchanger, an electric compressor connected with an outlet of the plate heat exchanger, and a condenser connected with an inlet of the expansion valve, wherein an outlet of the electric compressor is connected with an inlet of the condenser.
7. A pure electric engineering machinery heat dissipation system as claimed in claim 6, wherein an electric fan is provided on the condenser.
8. The pure electric engineering machinery heat dissipation system of claim 1, wherein the components comprise an oil pump motor, a walking motor, and a four-in-one controller, wherein the walking motor and the four-in-one controller are connected in series, the electromagnetic water valve inlet is connected with the first water pump outlet, the electromagnetic water valve comprises two outlets, and the two outlets are respectively connected with the inlets of the oil pump motor and the walking motor; the electromagnetic water valve comprises two paths of independently adjustable channels, and the outlet of the oil pump motor is converged with the cooling liquid at the outlet of the four-in-one controller and then connected with the inlet of the cooling liquid radiator; the outlet of the cooling liquid radiator is connected with the inlet of the water pump.
9. The purely electric engineering machinery heat dissipation system as claimed in claim 8, wherein the oil pump motor is provided with a temperature sensor, the walking motor is provided with a temperature sensor, the four-in-one controller is provided with a temperature sensor, the outlet of the coolant radiator is provided with a temperature sensor, and the vehicle control unit performs data interaction with the four sensors.
10. A control method of a pure electric engineering machinery heat dissipation system based on any one of claims 1-9 is characterized by comprising the following steps:
the vehicle control unit acquires data of each sensor and executes the following actions through control logic:
A) when T is0<min(T10,T20,T30)，T1<T10，T2<T20，T3<T30When the cooling liquid cooling system is naturally cooled by default, namely the first water pump works at the lowest rotating speed, the electric fan stops, and when each branch T is connected with the cooling liquid cooling system, the cooling liquid cooling system is naturally cooled1、T2、T3When any one of the three temperatures is close to the alarm value, the electric fan is started, and the rotating speed n of the electric fan isf1Gradually increased to the maximum speed nf1MaxOtherwise, restoring the default value;
B) when T is0<min(T10,T20,T30)，T1>T10，T2<T20，T3<T30When the water pump is used, a channel 1 from the inlet of the electromagnetic water valve to the walking motor is set to be in the maximum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the minimum opening degree, and the rotating speed n of the first water pump1Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
C) when T is0<min(T10,T20,T30)，T1>T10，T2>T20，T3<T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
D) when T is0<min(T10,T20,T30)，T1>T10，T2<T20，T3>T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
E) when T is0<min(T10,T20,T30)，T1>T10，T2>T20，T3>T30When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
F) when T is0<min(T10,T20,T30)，T1<T10，T2>T20，T3<T30When the water pump is used, a channel 1 from an inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
G) when T is0<min(T10,T20,T30)，T1<T10，T2>T20，T3>T30When the water pump is used, the electromagnetic water valve channel 1 is set to be at the minimum opening, the electromagnetic water valve channel 2 is set to be at the maximum opening, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
H) when T is0<min(T10,T20,T30)，T1<T10，T2<T20，T3>T30When the water pump is used, a channel 1 from an inlet of the electromagnetic water valve to the walking motor is set to be in the minimum opening degree, a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor is set to be in the maximum opening degree, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxOtherwise, restoring to the sequence A;
I) when T is0≥min(T10,T20,T30) When the water pump is used, the opening degree of a channel 1 from the inlet of the electromagnetic water valve to the walking motor and the opening degree of a channel 2 from the inlet of the electromagnetic water valve to the oil pump motor are set to be maximum, and the rotating speed n of the water pump 11Gradually increased to the maximum speed n1MaxIf the time of NS lasts, T0Is always more than or equal to min (T)10,T20,T30) The controller can prompt an alarm and carry out speed-limiting and torque-limiting operation on the motor, otherwise, the motor is recovered to A-H;
J) in the hydraulic oil heat-dissipating system, the rotating speed n of the electric fan 2f2The VCU of the vehicle control unit realizes speed change control and energy conservation and emission reduction, and when the VCU is used as Thy<Thy0When the fan 2 stops working; when T ishy0≤Thy≤ThymaxAt 2 n speeds of the electric fanf2Gradually increasing the speed to nf2Max(ii) a When lasting for the time of Ns, Thy≥ThymaxWhen the speed is limited, the controller can prompt an alarm and carry out speed limiting operation on the oil pump motor;
K) in the power battery heat dissipation system, the rotating speed n of the electric fan 3f3The VCU of the vehicle control unit realizes speed change control and energy conservation and emission reduction, and when the VCU is used as Tce<Tce0When the fan is started, the fan 3 stops working; when T isce0≤Thy≤TcemaxAt 3 rpm n of the electric fanf3Gradually increasing the speed to nf3MaxSpeed n of the water pump 22Gradually increased to the maximum speed n2Max(ii) a When lasting for the time of Ns, Tce≥TcemaxThe controller can prompt an alarm and send an instruction to the BMS systemReducing the output power of the power battery;
wherein: t is0For the coolant radiator outlet temperature, T10For oil pump motor alarm temperature, T20For warning the temperature, T, of the travelling motor30The four-in-one controller alarms temperature Thy0For hydraulic oil temperature alarm temperature, ThymaxFor hydraulic oil temperature limit, Tce0For power battery alarm temperature, TcemaxIs the power battery temperature limit.
CN202110425109.XA 2021-04-20 2021-04-20 Pure electric engineering machinery heat dissipation system and control method Pending CN113309764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110425109.XA CN113309764A (en) 2021-04-20 2021-04-20 Pure electric engineering machinery heat dissipation system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110425109.XA CN113309764A (en) 2021-04-20 2021-04-20 Pure electric engineering machinery heat dissipation system and control method

Publications (1)

Publication Number Publication Date
CN113309764A true CN113309764A (en) 2021-08-27

Family

ID=77372392

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110425109.XA Pending CN113309764A (en) 2021-04-20 2021-04-20 Pure electric engineering machinery heat dissipation system and control method

Country Status (1)

Country Link
CN (1) CN113309764A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114232715A (en) * 2021-12-23 2022-03-25 徐州徐工挖掘机械有限公司 Integrated heat dissipation system of small electric excavator and control method
CN115389053A (en) * 2022-08-19 2022-11-25 中国第一汽车股份有限公司 Reliability diagnosis method and device for temperature sensor of motor cooling system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114232715A (en) * 2021-12-23 2022-03-25 徐州徐工挖掘机械有限公司 Integrated heat dissipation system of small electric excavator and control method
CN114232715B (en) * 2021-12-23 2023-03-14 徐州徐工挖掘机械有限公司 Integrated heat dissipation system of small electric excavator and control method
CN115389053A (en) * 2022-08-19 2022-11-25 中国第一汽车股份有限公司 Reliability diagnosis method and device for temperature sensor of motor cooling system

Similar Documents

Publication Publication Date Title
JP6169225B1 (en) Battery pack thermal management system
CN109094356B (en) Electric automobile thermal management system
CN113442679B (en) Engineering machine and integrated thermal management system
CN106703967B (en) Engineering vehicle temperature control system and method based on double-cooling-loop split radiator
CN101811434B (en) Coach thermal management system and control method of fan set thereof
CN113309764A (en) Pure electric engineering machinery heat dissipation system and control method
CN102745063A (en) Electric vehicle cooling system and control algorithm thereof
US11870328B2 (en) Combined cooling system for motor and motor controller
CN109098832A (en) A kind of Mobile Power Transmission assembly joint cooling system and control method
CN115107457A (en) Thermal management system based on multi-way valve and electric device
CN216002113U (en) Pure electric vehicles cooling system based on VCU
CN113665318A (en) Control system and method for power battery of plug-in hybrid vehicle
CN210805962U (en) Battery thermal management system and vehicle
US11777121B2 (en) Power system, vehicle, vehicular power control method, and control method for power system
CN111255541A (en) Engine preheating system of hybrid electric vehicle and control method thereof
CN215370434U (en) Pure electric engineering machinery cooling system
CN216993878U (en) Cooling system with multiple regulation and control modes
CN109910542B (en) Vehicle and vehicle thermal management system
CN113942366B (en) Cold-hot circulating system of front-and-back double-motor electric automobile and control method
CN113119686B (en) System for realizing cooling medium exchange in range-extended vehicle and control method thereof
CN113829828A (en) Integrated heat management device suitable for hybrid power and pure electric vehicle
CN207315502U (en) A kind of engine thermal management system of distributed AC servo system
CN210956924U (en) Battery thermal management system and vehicle
CN117818341B (en) Amphibious vehicle thermal management system
CN115056628B (en) Mixed motor vehicle type thermal management system and automobile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination