CN109411850A - A kind of battery pack temperature control system and method - Google Patents
A kind of battery pack temperature control system and method Download PDFInfo
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- CN109411850A CN109411850A CN201811474043.8A CN201811474043A CN109411850A CN 109411850 A CN109411850 A CN 109411850A CN 201811474043 A CN201811474043 A CN 201811474043A CN 109411850 A CN109411850 A CN 109411850A
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- 239000007788 liquid Substances 0.000 claims abstract description 50
- 238000005259 measurement Methods 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000005070 sampling Methods 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 6
- 230000001934 delay Effects 0.000 claims description 5
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/62—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
- H01M10/635—Control systems based on ambient 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
- H01M10/65—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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- 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
-
- 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
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Automation & Control Theory (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
The present invention relates to vehicle technology fields, and in particular to a kind of battery pack temperature control system and method.Including expansion tank, radiator and fan assembly and for connecting water pump, fuel heater, the supervisor of temperature sensor and several battery pack liquid cooling plates, the expansion tank is connected to radiator and fan assembly water inlet, it further include waterway distributor and water route manifold valve, the supervisor is divided into several branch pipes by waterway distributor, the branch pipe is collected to supervisor by the water route manifold valve, several described battery pack liquid cooling plates are arranged in parallel on each branch pipe, the temperature sensor includes the temperature sensor TS1 being arranged between water pump downstream and waterway distributor upstream and the temperature sensor TS2 that is arranged between water pump upstream and water route manifold valve downstream.The temperature difference between battery pack is reduced, measurement accuracy is improved, keeps the calculating of battery pack target temperature more acurrate, improves battery bulk life time.
Description
Technical field
The present invention relates to vehicle technology fields, and in particular to a kind of battery pack temperature control system and method.
Background technique
Currently, new-energy automobile has been the main trend of Global Auto industry development.And as the big of new-energy automobile field
State, new-energy automobile develop in south China it is swift and violent, be undisputable fact in northern area continued downturn.To find out its cause, being
Since most of power battery is when temperature is higher than 40 DEG C and can all influence charge and discharge electrical efficiency, capacity and the longevity of battery lower than 0 DEG C
Life, and battery case does not add insulating layer for the needs that radiate, when the north enters winter, if outdoor temperature is -25 DEG C
When even lower, the serious charge and discharge effect for affecting power battery.
In order to solve the above problem, first is that research novel battery material and technology, improve the Acclimation temperature of power battery itself
Range improves the own temperature of power battery pack, meets the use temperature of dynamic lithium battery second is that increasing preheating, attemperator
It is required that.The mode of preheating insulation that existing electric vehicle mostly uses greatly improves the environmental suitability of battery, and existing electric vehicle follows
Loop system, each battery pack monomer are all connected on main line, and since pipeline is too long, temperature loss is larger, causes different electricity
The temperature difference between the packet of pond is larger.And battery pack is when heated, does not ensure that temperature while reaching target temperature.This results in mesh
Temperature computation inaccuracy is marked, and after the completion of heating, some battery packs are more than target temperature, and some battery packs also miss the mark
Temperature, this influences whether the service life of battery pack.
Summary of the invention
The purpose of the present invention is to the defect of the prior art, it is small to provide heating temperature error between a kind of battery pack,
And can guarantee that each battery pack can reach target temperature, improve battery pack temperature control system and the side of battery
Method.
A kind of battery pack temperature control system of the present invention, technical solution are as follows: total including expansion tank, radiator and fan
At with the supervisor for connecting water pump, fuel heater, temperature sensor and several battery pack liquid cooling plates, the expansion tank
It is connected to radiator and fan assembly water inlet, further includes waterway distributor and water route manifold valve, the supervisor passes through water route point
Orchestration is divided into several branch pipes, and the branch pipe is collected to supervisor, several described battery pack liquid cooling plates by the water route manifold valve
It is arranged in parallel on each branch pipe, the temperature sensor includes the temperature being arranged between water pump downstream and waterway distributor upstream
The degree sensor TS1 and temperature sensor TS2 being arranged between water pump upstream and water route manifold valve downstream.
It is more preferred, it further include the first two-position three-way valve and the second two-position three-way valve, first two-position three-way valve
Water inlet is connect with water pump, two water outlets respectively with the water inlet and the second two-position three-way valve of radiator and fan assembly one
A water inlet connection, the water outlet of second two-position three-way valve are connect with temperature sensor TS1, second two-position three-way valve
Another water inlet connect with the water outlet of radiator and fan assembly.
It is more preferred, it further include several pressure sensors, several flow sensors and several electromagnet cut off valve, the water
Pressure sensor PS1 and flow sensor FS1, the water pump upstream and water are in series between pump downstream and waterway distributor upstream
Pressure sensor PS6 and flow sensor FS2 are in series between the manifold valve downstream of road, every road branch pipe is in waterway distributor and battery
Electromagnet cut off valve and pressure sensor are in series between packet liquid cooling plate.
It is more preferred, it further include that liquid delays depressor, electric expansion valve, triple valve and four-way valve, the four-way valve water inlet
Mouth is connected with temperature sensor downstream supervisor, and three water outlets of the four-way valve delay depressor water inlet, electronics with liquid respectively
Expansion valve water inlet and the upstream pressure sensor PS1 supervisor connection, two water inlets of the triple valve respectively with electronic expansion
Valve water outlet and the supervisor's connection of the downstream flow sensor FS2, the water outlet of the triple valve are cold by an exhaust valve and one
But liquid filter is connect with fuel heater water inlet.
A kind of battery pack temprature control method of the present invention, technical solution are as follows: controlled using the battery pack temperature of this method
In system, battery pack liquid cooling plate is arranged in parallel by several branch pipes, and every branch is equipped with electromagnet cut off valve, this method packet
It includes:
Receive enabled instruction；
The data for reading battery management system BMS, according to the mean temperature number of battery pack each in battery management system BMS
According to progress operating mode judgement:
When the average temperature data of each battery pack=setting battery pack ideal working temperature, do not deal with；
When the average temperature data > setting battery pack ideal working temperature of each battery pack, and temperature difference is more than calibration
Value, into refrigerating mode；
When the average temperature data < setting battery pack ideal working temperature of each battery pack, and temperature difference is more than calibration
Value, system enter heating mode；
If accessing radiator and fan assembly into refrigerating mode, and fan operation is controlled, until each battery pack
Mean temperature be reduced to target temperature T1；
If starting fuel heater into heating mode and being heated to pipeline liquid, during heating, according to electricity
Packet temperature sequencing up to standard in pond successively disconnects the corresponding electromagnet cut off valve of each battery pack branch, until all battery pack temperature
Degree reaches target temperature T1.
It is more preferred, in the heating mode, if the temperature after heating is more than target heating temperature T1, cool down
Processing；
Temperature after heating is more than setting value T3, then accesses radiator and fan assembly, utilize the liquid in radiator
To cool down；
Temperature after heating is more than setting value T4, then accesses radiator and fan assembly, while opening radiator fan, benefit
With in radiator liquid and fan cool down；
The T1 < T3 < T4.
More preferred, the target temperature T1 is calculated according to the mean temperature of environment temperature and each battery pack,
The environment temperature is measured by the way that the temperature sensor TS2 and temperature sensor TS1 of water pump upstream and downstream is arranged in；
Before carrying out the operating mode judgement, temperature sensor TS1 and temperature sensor TS2 fault detection are carried out:
When the controller of battery pack temperature control system powers on, if temperature sensor TS1 and temperature sensor TS2 feedback is surveyed
Magnitude then judges temperature sensor TS1 or TS2 failure without measured value or not in measurement range, and sends temperature sensor event
Hinder code code；
The measured value of temperature sensor TS1 and temperature sensor TS2 are averaged with the BMS each battery pack sent respectively
Temperature is compared, if error exceeds zone of reasonableness, judges temperature sensor TS1 or TS2 failure, and send temperature sensor
Error code code.
It is more preferred, using in the battery pack temperature control system of this method, supervisor water pump upstream and downstream, with
And pressure sensor, the fault judgment method of the pressure sensor are equipped on the corresponding branch pipe of each battery pack are as follows:
When the controller of battery pack temperature control system powers on, if pressure sensor is not without measured value or in measurement range
It is interior, then judge the pressure sensor failure, concurrent pressurization pressure sensor fault code code；
Control water pump is run with egulation rotating speed, the pressure sensor when measured value of pressure sensor and system are run for the first time
Calibration value be compared, if error judges the pressure sensor failure beyond the error range allowed, concurrent pressurization pressure is passed
Sensor error code code.
It is more preferred, using in the battery pack temperature control system of this method, set in the water pump upstream and downstream of supervisor
There are flow sensor, the fault judgment method of the flow sensor are as follows:
When the controller of battery pack temperature control system powers on, if flow sensor is not without measured value or in measurement range
It is interior, then judge the flow sensor failure, and send flow sensor error code code；
Control water pump run with egulation rotating speed, by between the flow sensor of upstream and downstream measurement difference with allow to miss
Poor range is compared, if error judges the flow sensor failure, and send flow sensing beyond the error range allowed
Device error code code；
Control water pump is run with egulation rotating speed, the flow sensor when measured value of flow sensor and system are run for the first time
Calibration value be compared, if error judges the flow sensor failure beyond the error range allowed, and transmitted traffic passes
Sensor error code code.
It is more preferred, it further include supervisor and the judgement of branch pipe state, method are as follows:
Under the premise of all the sensors are trouble-free
If the flow sensor measurements of water pump upstream and downstream are identical in a sampling time section, and water pump upstream
It is all the same with the pressure sensor measurements of the pressure sensor measurements in downstream and every branch road, then be judged as supervisor with
Branch pipe is normal；
If the flow sensor measurements of water pump upstream and downstream are identical in a sampling time section, and water pump upstream
It is identical with the pressure sensor measurements in downstream, if the pressure sensor measurements of certain branch pipe are greater than water pump upstream and downstream
Pressure sensor measurements are then judged as this branch blockage；
If the flow sensor that water pump downstream flow sensors measured value is greater than upstream measures in a sampling time section
Value, water pump downstream pressure sensor measured value are greater than the pressure sensor measurements of upstream, and each item branch road pressure sensor
Measured value is equal and is greater than water pump upstream, downstream pressure sensor measured value, then is judged as each battery pack branch pipe pressure sensor
Downstream part leakage；
If the flow sensor that water pump downstream flow sensors measured value is greater than upstream measures in a sampling time section
Value, water pump downstream pressure sensor measured value are greater than the pressure sensor measurements of upstream, and each item branch road pressure sensor
Measured value is equal with water pump upstream, downstream pressure sensor measured value, then is judged as each battery pack branch pipe pressure sensor upstream
Part leakage；
If the flow sensor that water pump downstream flow sensors measured value is less than upstream measures in a sampling time section
Value, water pump downstream pressure sensor measured value are greater than the pressure sensor measurements of upstream, then are judged as that water pump downstream pipe is stifled
Plug；
If the flow sensor that water pump downstream flow sensors measured value is less than upstream measures in a sampling time section
Value, water pump downstream pressure sensor measured value are less than the pressure sensor measurements of upstream, are then judged as water pump to two flows
Pipeline blockage between sensor.
The invention has the benefit that the system and control method can be in extremely frigid zones, to liquid cooling battery pack with suitable
Temperature rise heating, the normal charge and discharge of power battery energy, make pure electric vehicle vehicle in extremely low ring in the case that guarantee environment temperature is extremely low
It can be operated normally at a temperature of border；And the system can give the timely and effective drop of battery pack when battery temperature is more than normal range of operation
Temperature.
1, supervisor is split by multiple branches using waterway distributor and water route manifold valve, battery pack monomer is arranged in parallel
On each road, the length of pipe between battery pack is effectively reduced, reduces the temperature difference between battery pack, improves survey
Accuracy of measurement keeps the calculating of battery pack target temperature more acurrate, improves battery bulk life time.And each batteries in parallel connection packet branch is all provided with
Hydraulic and temperature acquisition is set, can be reached with precise control of temperature and each battery pack samming is heated to be suitble to operating mode.
2, the company between radiator and fan assembly and the circulatory system is formed using this purely mechanic component of two-position three-way valve
Fitting is isolated in a large amount of coolant liquids in radiator outside the circulatory system, greatly reduces and need to heat
Total amount of liquid, make battery pack temperature increase efficiency greatly improve.
3, triple valve and four-way valve are connected using electric expansion valve, pipeline is stifled between four-way valve downstream and triple valve upstream
When plug, partial circulating is formed, effectively reduces loine pressure, improves the safety of pipeline circulation.
4, liquid is connected by four-way valve and delays depressor, circulation fluid fluctuation caused by pump rotary speed changes is effectively reduced, improves
The measurement accuracy of flow sensor and pressure sensor.
5, the sequencing of target temperature successively disconnected branches are reached according to battery pack, makes each battery pack can be just
Reach target temperature, avoids temperature too low or cross to heat, effectively raise the service life of battery volume.
6, it when temperature is heated beyond target, according to the degree difference for being more than target temperature, is dropped using radiator coolant
Temperature or fan for cooling, it is more energy saving.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of battery pack temperature control system of the present invention；
Fig. 2 is a kind of electrical schematics of battery pack temperature control system of the present invention；
Fig. 3 is a kind of battery pack temprature control method flow chart of the present invention.
In figure: 1-expansion tank, 2-radiators and fan assembly, 3-two-position three-way valve Isosorbide-5-Nitraes-two-position three-way valve 2,
5-temperature sensor TS1,6-four-way valves, 7-liquid delay depressor, 8-pressure sensor PS1,9-flow sensor FS1,
10-waterway distributors, 11-electromagnet cut off valve, 4,12-electromagnet cut off valve, 3,13-electromagnet cut off valve, 2,14-electromagnet cut off valve
1,15-pressure sensor PS5,16-pressure sensor PS4,17-pressure sensor PS3,18-pressure sensor PS2,
19-battery pack, 4 liquid cooling plate, 20-battery pack, 3 liquid cooling plate, 21-battery pack, 2 liquid cooling plate, 22-battery pack, 1 liquid cooling plate, 23-
Water route manifold valve, 24-pressure sensor PS6,25-temperature sensor TS2,26-check valves, 27-flow sensor FS2,
28-triple valves, 29-electric expansion valves, 30-exhaust valves, 31-coolant filters, 32-fuel heaters, 33-water
Pump, 34-system controllers, 35-battery BMS systems, 36-remote control modules, 37-entire car controllers.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for this hair is well understood
It is bright, but they limiting the invention.
As shown in Figure 1, including expansion tank 1, radiator and fan assembly 2 and for connecting water pump 33, fuel heater
32, the supervisor of temperature sensor and several battery pack liquid cooling plates.The expansion tank 1 is intake with radiator and fan assembly 2
Mouthful connection, further includes waterway distributor 10 and water route manifold valve 23, and the supervisor is divided by waterway distributor 10 for several branch pipes,
The branch pipe is collected to supervisor, several described battery pack liquid cooling plates, including 1 battery pack, 4 liquid by the water route manifold valve 23
Cold plate 9,3 liquid cooling plate 20 of battery pack, 2 liquid cooling plate 21 of battery pack, 1 liquid cooling plate 22 of battery pack are arranged in parallel on each branch pipe.Institute
Temperature sensor is stated to include the temperature sensor TS15 being arranged between water pump downstream and waterway distributor upstream and be arranged in water
Pump the temperature sensor TS2 25 between upstream and 23 downstream of water route manifold valve.
It is more preferred, it further include the first two-position three-way valve 3 (i.e. two-position three-way valve 1) and the second two-position three-way valve 4 (i.e. two
Position three-way valve 2), the water inlet of first two-position three-way valve 3 is connect with water pump 33, two water outlets respectively with radiator and wind
Fan the water inlet connection of the water inlet and the second two-position three-way valve 4 of assembly 2, the water outlet of second two-position three-way valve 4
It is connect with temperature sensor TS15, another water inlet and radiator of second two-position three-way valve 4 and going out for fan assembly 2
Mouth of a river connection.
It is more preferred, it further include several pressure sensors, several flow sensors and several electromagnet cut off valve, the water
It pumps and is in series with pressure sensor PS1 8 and flow sensor FS1 9, the water pump between 10 upstream of 33 downstreams and waterway distributor
Pressure sensor PS6 24 and flow sensor FS2 27, every road branch pipe are in series between 23 downstream of 33 upstreams and water route manifold valve
Electromagnet cut off valve 11~14 and pressure sensor are in series between waterway distributor 10 and battery pack liquid cooling plate.Wherein, it presses
Force snesor includes pressure sensor PS5 15, pressure sensor PS4 16, pressure sensor PS3 17, pressure sensor PS2
18。
It is more preferred, it further include that liquid delays depressor 7, electric expansion valve 29, triple valve 28 and four-way valve 6, the four-way
6 water inlet of valve and 5 downstream of temperature sensor supervisor connect, three water outlets of the four-way valve 6 delay respectively with liquid depressor 7 into
The mouth of a river, 29 water inlet of electric expansion valve and the supervisor's connection of 8 upstream pressure sensor PS1, two water inlets of the triple valve 28
It is connected respectively with 29 water outlet of electric expansion valve and 27 downstream flow sensor FS2 supervisor, the water outlet of the triple valve 28 is logical
It crosses an exhaust valve 30 and a coolant filter 31 is connect with 32 water inlet of fuel heater.
Liquid delays depressor 7, for absorbing the pressure oscillation generated when water pump 33 is run, guarantees the parameter of each sensor acquisition
It is more accurate；It is also equipped with check valve 26 in pipeline, guarantees the pressure of adjustable system coolant liquid, prevents the reaction of pressure；
Exhaust valve 30, the bubble discharge line that can will be generated in pipeline；With four-way valve 6, triple valve 28, by electric expansion valve in embodiment
29 and it is connected to pipeline, it is cooling with heating-system-controller 34 when the loine pressure caused by downstream pipe blocking rapidly increases
Valve opening is controlled, guarantees system line pressures in the reasonable scope；There is electromagnet cut off valve 11,12,13,14 in embodiment, if
It is placed in each battery pack liquid cooling branch road, when the failure of battery pack downstream pipe can disconnect the branch.
As shown in Fig. 2, the system receives the telecommand for the starting heating system that driver issues by remote control module 36；
It cools down in embodiment and is connected by CAN bus with battery pack BMS 35 with heating-system-controller 34, receive battery relevant information
(temperature data including each battery pack).Or fault message is sent to entire car controller 37, the system control is according to battery
Relevant information and operating mode control the water pump, radiator fan, liquid heater, two-position three-way valve, electromagnet cut off valve etc..
As shown in figure 3, a kind of battery pack temprature control method process is as follows:
The first step, for vehicle in dead ship condition, driver presses manual or remote control switch, issues the instruction of activation system, institute
It states system controller and receives instruction, carry out step in next step；
Second step, the system controller start self-check program, and then system issues alarm signal to fail self-test, into failure
Tupe；Self-test is by then carrying out in next step；
Third step, the various sensors having connected in the system controller activation system, and read and record each sensor
Data judge each sensor with the presence or absence of failure, in which:
The breakdown judge logic of temperature sensor TS1, TS2: first step system controller powers on, and establishes by cable on temperature sensor
Beginning work, feedback measured value should be within measurement ranges (such as -30 DEG C~90 DEG C)；As sensor exists without measured value or measured value
Except measurement range value, then controller is judged as temperature sensor fault.Second step controller can be by the measurement of each sensor
The mean temperature that value is sended over BMS system compares, and (this range senses error according to actual temp in the reasonable scope
The setting of device measurement accuracy), it is normal to be considered as sensor；It such as measures temperature and mean temperature difference error is too big, then controller judges
For sensor fault.System issues temperature sensor fault code code；If system determines a sensor fault, system can be with event
Barrier operation was unable to run (limping principle) after N hours；When system determines two sensor simultaneous faults, system is unable to run simultaneously
Report catastrophe failure.
The breakdown judge logic of pressure sensor PS1, PS2, PS3, SP4, PS5, PS6: first step system controller powers on,
Pressure sensor powers on start-up operation, and feedback measured value should be within measurement range (such as 0~0.6Mpa)；If sensor is without survey
Magnitude or measured value are except measurement range value, then controller is judged as pressure sensor failure.Second step controller will start
Water pump is run with certain revolving speed, each pressure sensor calibrating value that the measured value of six pressure sensors and system are run for the first time
It compares, the judgement for being greater than value range with calibration value error is sensor fault.
The breakdown judge logic of flow sensor FS1, FS2: first step system controller powers on, and establishes by cable on flow sensor
Beginning work, feedback measured value should be within measurement range (such as 0~0L/min)；As sensor is being surveyed without measured value or measured value
It measures except value range, then controller is judged as flow sensor failure.Second step controller will start water pump and be transported with certain revolving speed
Row, the measured value of two flow sensors is compared mutually, (this range is according to specific flow sensing in the reasonable scope for error
The setting of device measurement accuracy), it is judged as that sensor is normal；If two flow sensor measurements errors are too big, then pass through controller
Judge flow sensor possible breakdown.The flow sensing that third step controller can run for the first time each measurement value sensor and system
Device calibration value compares, and the judgement for being greater than value range with calibration value error is sensor fault or the system failure.
The sensor has any one pressure, flow sensor parameter value to have exception, that is, is determined as that failure, system enter
Troubleshooting mode；System determines that each sensor fault-free, system carry out in next step；
System starts self-test, BMS self-test by CAN message signal activation battery BMS while judging sensor fault
Failure, system enter troubleshooting mode；BMS self-test passes through, and reads each battery pack, module temperature, is sent to by CAN message
Heating-system-controller, system carry out in next step.
4th step, specially system controller confirm sensor fault-free, and BMS communication is normal, controller start water pump with
Constant rotational speed operation confirms in system pipeline according to each sensor parameters without failures such as blocking, leakages.
Specific breakdown judge logic: flow sensor FS1, FS2 and pressure sensor PS1, PS2, PS3, PS4, PS5, PS6
Measured value comparison, define PS1, PS6 be main line-pressure sensor, define PS2, PS3, PS4, PS5 be branch pressure sense
Device, each sensor parameter value is that the system failure judges absolute value when system operates normally.
If 1. in a period (using the second as the order of magnitude) FS1 value=FS2 value, and PS1 value, PS2, PS3, PS4, PS5, PS6
It is worth equal, and various system absolute value errors are determined as that system pipeline is normal in range；
If 2. FS1 value=FS2 value in a period, and PS1 value=PS6 value, any one sensing in PS2, PS3, PS4, PS5
The value of device is greater than PS1, PS6 value, and FS1, FS2, PS1, PS6 value and absolute value error judge that the branch blocks in range；
3. if PS1 value > PS6 value, PS2, PS3, PS4, PS5 value are equal and value is greater than FS1 value > FS2 value in a period
PS6 value is determined as each battery pack downstream branch portions leakage.
If 4. FS1 value > FS2 value in a period, PS1 value > PS6 value, PS2, PS3, PS4, PS5 value is equal and value=
PS6 value is determined as each battery pack branch pressure sensor upstream part leakage.
5. if FS1 value < FS2 value in a period, PS1 value > PS6 value, determine that flow sensor PS1 tract pipeline is stifled
Plug.
6. if FS1 value < FS2 value in a period, PS1 value < PS6 value, determine that the downstream flow sensor FS2 to flow passes
FS1 sections of pipeline liquid leakages of sensor.
System is faulty, into troubleshooting mode, system fault-free, into next step.
5th step, cooling and heating-system-controller are calculated according to the temperature information that BMS is sended over, and judge that system is
Into refrigerating mode, solution heat pattern or the mode not run.Specifically:
1. the average temperature data ≈ of each battery pack sets battery pack ideal working temperature (value range), system is not transported
Row；
2. the average temperature data > of each battery pack sets battery pack ideal working temperature, and temperature difference is to certain value,
System enters refrigerating mode；
3. the average temperature data < of each battery pack sets battery pack ideal working temperature, and temperature difference is to certain value,
System enters heating mode.
6th step, if system detection passes through and judges to enter refrigerating mode, system controller is according to battery pack temperature value meter
The revolving speed of electromagnetic fan, the revolving speed and flow rate of liquid of water pump are calculated, battery pack temperature is reduced to ideal operation temperature by continuous service
Range is spent, and continuous service system keeps the temperature to issue the message information that power battery powers off to vehicle.
7th step, if system detection passes through and judges to enter heating mode, the specially described system controller controls water pump
It operates to maximum speed, while to two two-position three-way valves power supplies, it is right by radiator and fan assembly access system conduit
System pipeline carries out fluid infusion and excludes the air in liquid；Run the rear progress of 60S or so in next step；
8th step, the system controller give the power-off of two two-position three-way valves, radiator and fan assembly are isolated are
System；System carries out in next step；
9th step, the system controller send enabled instruction to fuel heater, and fuel heater is opened after preheating about 60S
Beginning ignition operation；System carries out in next step；
Tenth step, system controller are calculated and are most closed according to the temperature parameter of battery pack and the temperature parameter of liquid cooling system
Suitable system liquid heating temperature (i.e. target heating temperature T1), the revolving speed of water pump and the power of loine pressure, fuel heater
Deng being begun to warm up to battery pack；System, which operates normally, to be entered in next step；
11st step, when fluid temperature is more than setting value T3 in circuit, the system controller can be started or shut down in due course
Radiator and fan assembly are accessed or isolate fluid loop, adjusted using the liquid in radiator by two two-position three-way valves
Save temperature；When fluid temperature is more than setting value T4 in circuit, the system controller can start or shut down two two three in due course
Radiator and fan assembly are accessed or isolate fluid loop, and control the revolving speed of radiator fan to adjust liquid temperature by port valve
Degree；It is carried out in next step when system operates normally, wherein T1 < T3 < T4；
12nd step, specially when system continues to be heated to suitable temperature to battery pack, it is each that BMS continues to monitor battery pack
Point temperature, when monitoring has some battery pack temperature slightly lower, the system controller meeting controlling brancher electromagnet cut off valve shutdown has reached
To the battery pack branch for requiring temperature, the battery pack branch for not reaching requirement is continued to run, until all battery pack temperature reach
In consistent or reasonable the temperature difference range, system continues heating 5-10 minutes, and system carries out row in next step；
13rd step, the system controller issue halt instruction to fuel heater, and heater is shut down, system water pump after
It reforwarding row 3-5 minutes, then stalls, system controller enters standby mode.
When system is received again by enabled instruction, can repeat the above steps.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of battery pack temperature control system, including expansion tank (1), radiator and fan assembly (2) and for connecting water
Pump (33), fuel heater (32), temperature sensor and several battery pack liquid cooling plates supervisor, the expansion tank (1) with
Radiator and the connection of fan assembly (2) water inlet, it is characterised in that: further include waterway distributor (10) and water route manifold valve
(23), the supervisor is divided into several branch pipes by waterway distributor (10), and the branch pipe is converged by the water route manifold valve (23)
To being responsible for, several described battery pack liquid cooling plates are arranged in parallel on each branch pipe collection, and the temperature sensor includes that setting exists
Temperature sensor TS1 (5) between water pump (33) downstream and waterway distributor (10) upstream and setting water pump (33) upstream with
Temperature sensor TS2 (25) between water route manifold valve (23) downstream.
2. battery pack temperature control system according to claim 1, it is characterised in that: further include the first two-position three-way valve
(3) it is connect with the second two-position three-way valve (4), the water inlet of first two-position three-way valve (3) with water pump (33), two water outlets
It is connect respectively with a water inlet of the water inlet and the second two-position three-way valve (4) of radiator and fan assembly (2), described second
The water outlet of two-position three-way valve (4) is connect with temperature sensor TS1 (5), another water inlet of second two-position three-way valve (4)
Mouth is connect with the water outlet of radiator and fan assembly (2).
3. battery pack temperature control system according to claim 1, it is characterised in that: further include several pressure sensors,
Several flow sensors and several electromagnet cut off valve are in series between water pump (33) downstream and waterway distributor (10) upstream
Pressure sensor PS1 (8) and flow sensor FS1 (9) goes here and there between water pump (33) upstream and water route manifold valve (23) downstream
It is associated with pressure sensor PS6 (24) and flow sensor FS2 (27), every road branch pipe is in waterway distributor (10) and battery pack liquid cooling
Electromagnet cut off valve and pressure sensor are in series between plate.
4. battery pack temperature control system according to claim 3, it is characterised in that: further include that liquid delays depressor (7), electricity
Sub- expansion valve (29), triple valve (28) and four-way valve (6), four-way valve (6) water inlet and temperature sensor downstream supervisor connect
Connect, three water outlets of the four-way valve (6) delay respectively with liquid depressor (7) water inlet, electric expansion valve (29) water inlet and
The supervisor's connection of (8) upstream pressure sensor PS1, two water inlets of the triple valve (28) go out with electric expansion valve (29) respectively
The mouth of a river and the supervisor's connection of (27) downstream flow sensor FS2, the water outlet of the triple valve (28) pass through an exhaust valve (26)
It is connect with a coolant filter (31) with fuel heater (32) water inlet.
5. a kind of battery pack temprature control method, it is characterised in that: using in the battery pack temperature control system of this method, battery
Packet liquid cooling plate is arranged in parallel by several branch pipes, and every branch is equipped with electromagnet cut off valve, this method comprises:
Receive enabled instruction；
Read battery management system BMS data, according to the average temperature data of battery pack each in battery management system BMS into
The judgement of row operating mode:
When the average temperature data of each battery pack=setting battery pack ideal working temperature, do not deal with；
When the average temperature data > setting battery pack ideal working temperature of each battery pack, and temperature difference is more than calibration value, into
Enter refrigerating mode；
When the average temperature data < setting battery pack ideal working temperature of each battery pack, and temperature difference is more than calibration value, is
System enters heating mode；
If accessing radiator and fan assembly into refrigerating mode, and fan operation is controlled, until each battery pack is flat
Equal temperature is reduced to target temperature T1；
If starting fuel heater into heating mode and being heated to pipeline liquid, during heating, according to battery pack
Temperature sequencing up to standard successively disconnects the corresponding electromagnet cut off valve of each battery pack branch, until all battery pack temperature are equal
Reach target temperature T1.
6. battery pack temprature control method as claimed in claim 5, it is characterised in that: in the heating mode, if after heating
Temperature be more than target heating temperature T1, then carry out cooling processing；
Temperature after heating is more than setting value T3, then accesses radiator and fan assembly, dropped using the liquid in radiator
Temperature；
Temperature after heating is more than setting value T4, then accesses radiator and fan assembly, while opening radiator fan, using dissipate
Liquid and fan in hot device cool down；
The T1 < T3 < T4.
7. battery pack temprature control method as claimed in claim 5, which is characterized in that the target temperature T1 is according to environment temperature
The mean temperature of degree and each battery pack is calculated, and the environment temperature passes through the temperature biography that water pump upstream and downstream is arranged in
Sensor TS2 and temperature sensor TS1 are measured；
Before carrying out the operating mode judgement, temperature sensor TS1 and temperature sensor TS2 fault detection are carried out:
When the controller of battery pack temperature control system powers on, if temperature sensor TS1 and temperature sensor TS2 feeds back measured value
Without measured value or not in measurement range, then temperature sensor TS1 or TS2 failure is judged, and send temperature sensor fault code
Code；
By the measured value of temperature sensor TS1 and temperature sensor TS2 respectively with BMS send each battery pack mean temperature
It is compared, if error exceeds zone of reasonableness, judges temperature sensor TS1 or TS2 failure, and send temperature sensor fault
Code code.
8. battery pack temprature control method as claimed in claim 5, which is characterized in that using the battery pack temperature control of this method
In system processed, it is equipped with pressure sensor on the water pump upstream and downstream and the corresponding branch pipe of each battery pack of supervisor, institute
State the fault judgment method of pressure sensor are as follows:
When the controller of battery pack temperature control system powers on, if pressure sensor without measured value or not in measurement range,
Judge the pressure sensor failure, concurrent pressurization pressure sensor fault code code；
Control water pump is run with egulation rotating speed, the survey of pressure sensor when the measured value of pressure sensor and system are run for the first time
Magnitude is compared, if error judges the pressure sensor failure, concurrent pressurization pressure sensor beyond the error range allowed
Error code code.
9. battery pack temprature control method as claimed in claim 5, which is characterized in that using the battery pack temperature control of this method
In system processed, flow sensor, the fault judgment method of the flow sensor are equipped in the water pump upstream and downstream of supervisor are as follows:
When the controller of battery pack temperature control system powers on, if flow sensor without measured value or not in measurement range,
Judge the flow sensor failure, and sends flow sensor error code code；
Control water pump is run with egulation rotating speed, by the measurement difference and allowable error model between the flow sensor of upstream and downstream
It encloses and is compared, if error judges the flow sensor failure beyond the error range allowed, and send flow sensor event
Hinder code code；
Control water pump is run with egulation rotating speed, the survey of flow sensor when the measured value of flow sensor and system are run for the first time
Magnitude is compared, if error judges the flow sensor failure, and send flow sensor beyond the error range allowed
Error code code.
10. battery pack temprature control method as claimed in claim 5, which is characterized in that further include that supervisor and branch pipe state are sentenced
It is disconnected, method are as follows:
Under the premise of all the sensors are trouble-free
If the flow sensor measurement data of water pump upstream and downstream is identical in a sampling time section, and water pump upstream and
The pressure sensor measurements in downstream and the pressure sensor measurements of every branch road are all the same, then are judged as supervisor and branch
It manages normal；
If the flow sensor measurement data of water pump upstream and downstream is identical in a sampling time section, and water pump upstream and
The pressure sensor measurements in downstream are identical, if the pressure sensor measurements of certain branch pipe are greater than the pressure of water pump upstream and downstream
Force sensor measuring value is then judged as this branch blockage；
If the flow sensor that water pump downstream flow sensors measurement data is greater than upstream measures number in a sampling time section
According to water pump downstream pressure sensor measured value is greater than the pressure sensor measurements of upstream, and each item branch road pressure sensor
Measured value is equal and is greater than water pump upstream, downstream pressure sensor measured value, then is judged as each battery pack branch pipe pressure sensor
Downstream part leakage；
If the flow sensor that water pump downstream flow sensors measurement data is greater than upstream measures number in a sampling time section
According to water pump downstream pressure sensor measured value is greater than the pressure sensor measurements of upstream, and each item branch road pressure sensor
Measured value is equal with water pump upstream, downstream pressure sensor measured value, then is judged as each battery pack branch pipe pressure sensor upstream
Part leakage；
If the flow sensor that water pump downstream flow sensors measurement data is less than upstream measures number in a sampling time section
According to water pump downstream pressure sensor measured value is greater than the pressure sensor measurements of upstream, then is judged as that water pump downstream pipe is stifled
Plug；
If the flow sensor that water pump downstream flow sensors measurement data is less than upstream measures number in a sampling time section
According to water pump downstream pressure sensor measured value is less than the pressure sensor measurements of upstream, then is judged as water pump to two flows
Pipeline blockage between sensor.
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| CN201811474043.8A CN109411850A (en) | 2018-12-04 | 2018-12-04 | A kind of battery pack temperature control system and method |
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| CN113707968A (en) * | 2021-10-29 | 2021-11-26 | 三一汽车制造有限公司 | Multi-branch high-voltage battery system and temperature difference control method and device thereof |
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