CN108878995A - Determine the method, apparatus and control method of the battery pack temperature difference of new energy vehicle - Google Patents

Determine the method, apparatus and control method of the battery pack temperature difference of new energy vehicle Download PDF

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Publication number
CN108878995A
CN108878995A CN201810371214.8A CN201810371214A CN108878995A CN 108878995 A CN108878995 A CN 108878995A CN 201810371214 A CN201810371214 A CN 201810371214A CN 108878995 A CN108878995 A CN 108878995A
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China
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temperature difference
detected value
battery pack
time
processing
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CN201810371214.8A
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CN108878995B (en
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陆群
张宇
刘天鸣
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CH Auto Technology Co Ltd
Beijing Changcheng Huaguan Automobile Technology Development Co Ltd
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Beijing Changcheng Huaguan Automobile Technology Development Co Ltd
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Priority to CN201810371214.8A priority Critical patent/CN108878995B/en
Priority to PCT/CN2018/114542 priority patent/WO2019205572A1/en
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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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—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
    • H01M10/60—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
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Automation & Control Theory (AREA)

Abstract

Embodiment of the present invention discloses the method, apparatus and control method of the battery pack temperature difference of determining new energy vehicle.Method includes：Multiple temperature sensors are arranged in multiple pre-positions of battery pack；The detected value that multiple temperature sensors respectively provide is received, and detected value is executed and gives up processing for the first time, giving up processing for the first time includes：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；The first mean value of remaining detected value after giving up processing for the first time is calculated, is based on first the first standard deviation of mean value computation, and additional treatments are executed to remaining detected value after giving up processing for the first time, additional treatments include：Execute the detected value for giving up the first standard deviation for being greater than prearranged multiple with the absolute value of the difference of the first mean value gives up processing for the second time；By the difference of the maxima and minima in detected value remaining after additional treatments, it is determined as the battery pack temperature difference.The measured value that sensor fault is excluded using statistics parameter improves the correctness of the temperature difference.

Description

Determine the method, apparatus and control method of the battery pack temperature difference of new energy vehicle
Technical field
The present invention relates to automobile technical field, more particularly, to the battery pack temperature difference for determining new energy vehicle method, Device and control method.
Background technique
Energy shortage, oil crisis and environmental pollution grow in intensity, and bring tremendous influence, direct relation to people's lives To the sustainable development of national economy and society.Countries in the world are all in active development new energy technology.Reduce consumption of petroleum, low It pollutes, the new-energy automobile of low noise, it is considered to be solve the important channel of energy crisis and environmental degradation.
New-energy automobile refer to using unconventional vehicle fuel as a source of power (or using conventional vehicle fuel, Using new vehicle-mounted power plant), the dynamic Control of comprehensive vehicle and the advanced technology of driving aspect, the technical principle of formation Advanced automobile with new technology, new construction.New-energy automobile generally includes four major types, mixed power electric car (HEV), pure electric automobile (BEV), fuel cell electric vehicle (FCEV) and other new energy (such as supercapacitors, flywheel High-efficiency energy storage vehicle) automobile etc..
In new-energy automobile, power battery drive motor generates power, therefore the performance of power battery and service life are Influence the key factor of automotive performance.Since space is limited on vehicle, battery generates amount of heat by spacial influence at work And accumulate, it causes temperature everywhere uneven and influences the consistency of battery cell, so that battery charging and discharging cycle efficieny is reduced, shadow The power and energy for ringing battery play, and also will lead to thermal runaway when serious, influence the safety and reliability of system.In order to make Power battery plays optimum performance and service life, needs to optimize the structure of battery pack, and battery temperature is kept using heat management system Degree guarantees battery each section temperature equalization in suitable section.Heat management system is each battery pack by system pipeline Water chamber provides heat dissipation and refrigeration of the coolant liquid realization to battery pack.
In the prior art, by being arranged in the temperature data of temperature sensor acquisition everywhere of battery pack everywhere, according to The raw temperature data of acquisition, wherein maximizing TmaxWith minimum value Tmin, subtracted each other using them and obtain battery pack temperature Difference.Work as maximum of TmaxWith minimum value TminBeyond some fix threshold value when, system thinks that its data is wrong, and is abandoned, To guarantee the accuracy of differential thermal calculation.
However, although existing scheme has evaded temperature measurement errors caused by sensor failure, but it is for sensor Error caused by itself can not judge, to reduce the accuracy of differential thermal calculation.
Summary of the invention
The purpose of the present invention is to propose to the method, apparatus and controlling party of a kind of battery pack temperature difference of determining new energy vehicle Method, to improve the accuracy of differential thermal calculation.
Embodiment of the present invention includes：
A kind of method of the battery pack temperature difference of determining new energy vehicle, including：
Multiple temperature sensors are arranged in multiple pre-positions of the battery pack；
The detected value that the multiple temperature sensor respectively provides is received, and the detected value is executed and gives up place for the first time Reason, the first time give up processing and include：Give up and is greater than the first predetermined threshold or the detection lower than the second predetermined threshold Value；
The first mean value for calculating remaining detected value after giving up processing for the first time is marked based on first mean value computation first It is quasi- poor, and remaining detected value execution additional treatments after processing are given up to the first time, the additional treatments include：It executes Give up second of house of the detected value for first standard deviation for being greater than prearranged multiple with the absolute value of the difference of first mean value Abandoning processing；
By the difference of the maxima and minima in remaining detected value after the additional treatments, it is determined as the battery pack temperature Difference.
In one embodiment, execute it is described give up processing for the second time after, the additional treatments further include：
Second mean value for giving up remaining detected value after processing for the second time is calculated, based on second mean value computation the Two standard deviations, and to it is described give up remaining detected value after processing for the second time and execute third time give up processing, the third time is given up Abandoning is handled：Give up the detection for being greater than second standard deviation of prearranged multiple with the absolute value of the difference of second mean value Value.
In one embodiment, the prearranged multiple is 3.
A kind of device of the battery pack temperature difference of determining new energy vehicle, including：
Receiving module, for receiving the multiple temperature sensors arranged in multiple pre-positions of the battery pack respectively The detected value of offer, and the detected value is executed and gives up processing for the first time, the first time gives up processing and includes：Give up big In the first predetermined threshold or lower than the detected value of the second predetermined threshold；
Computing module gives up the first mean value of remaining detected value after processing for calculating first time, is based on described first The first standard deviation of mean value computation, and remaining detected value executes additional treatments after giving up processing to the first time, it is described additional Processing includes：Execute the inspection for giving up first standard deviation for being greater than prearranged multiple with the absolute value of the difference of first mean value Measured value gives up processing for the second time；
Determining module, for determining the difference of the maxima and minima in remaining detected value after the additional treatments For the battery pack temperature difference.
In one embodiment, computing module, for execute it is described give up processing for the second time after, further calculate It is described give up for the second time processing after remaining detected value the second mean value, be based on second standard deviation of the second mean value computation, and To it is described give up remaining detected value after processing for the second time and execute third time give up processing, the third time gives up processing and includes： Give up the detected value for being greater than second standard deviation of prearranged multiple with the absolute value of the difference of second mean value.
A kind of control method of new energy vehicle tandem heat management pipeline, the heat management pipeline include：Water pump；Heating Element, the water inlet of the heating element are connected with the water outlet of the water pump；Battery pack comprising multiple batteries includes cloth Set the first coolant connection and the second coolant liquid of the opposite side for being arranged in first side in the first side of the battery pack Each pipeline of interface, each water chamber in the battery pack for heating each battery is serially connected；Reversal valve, and it is described The water outlet of heating element, the water return outlet of the water pump, the first coolant connection and the second coolant connection are separately connected；It should Method includes：
The temperature difference of the battery pack is detected, including：Arrange that multiple temperature pass in multiple pre-positions of the battery pack Sensor；The detected value that the multiple temperature sensor respectively provides is received, and the detected value is executed and gives up place for the first time Reason, the first time give up processing and include：Give up and is greater than the first predetermined threshold or the detection lower than the second predetermined threshold Value；The first mean value of remaining detected value after giving up processing for the first time is calculated, first standard of the first mean value computation is based on Difference, and remaining detected value executes additional treatments after giving up processing to the first time, the additional treatments include：Execute house Abandon giving up for the second time for the detected value for first standard deviation for being greater than prearranged multiple with the absolute value of the difference of first mean value Processing；By the difference of the maxima and minima in remaining detected value after the additional treatments, it is determined as the temperature difference；
The valve control that commutates is generated based on the comparison result of the temperature difference and predetermined temperature difference threshold value keeps order or commutation Order；
The reversal valve is based on holding order and keeps water route direction to be to flow to second from first coolant connection Coolant connection, and it is cold to flow to first from second coolant connection by water route direction transformation to be based on the commutation command But liquid interface.
In one embodiment, the commutation valve control based on the temperature difference knot compared with predetermined temperature difference threshold value Fruit generates holding order or commutation command includes：
When the temperature difference is greater than the predetermined temperature difference threshold value, the commutation valve control generates the commutation command, And holding order is continuously generated in the predetermined time after the commutation command generating.
In one embodiment, water route direction transformation is connect from second coolant liquid based on the commutation command Mouth flows to after the first coolant connection, and this method further includes：
When temperature difference appearance first reduces the variation increased again and when the temperature difference is greater than the predetermined temperature difference thresholding again When value, the commutation valve control generates the second commutation command；
It is from the first coolant connection stream that the reversal valve, which is based on second commutation command for water route direction transformation, To second coolant connection.
A kind of control method of new energy vehicle tandem heat management pipeline, the heat management pipeline include：Water pump；Refrigeration Element, the water inlet of the cooling element are connected with the water outlet of the water pump；Battery pack comprising multiple batteries includes cloth Set the first coolant connection and the second coolant liquid of the opposite side for being arranged in first side in the first side of the battery pack Each pipeline of interface, each water chamber in the battery pack for cooling down each battery is serially connected；Reversal valve, and it is described The water outlet of cooling element, the water return outlet of the water pump, the first coolant connection and the second coolant connection are separately connected；It should Method includes：
The temperature difference of the battery pack is detected, including：Arrange that multiple temperature pass in multiple pre-positions of the battery pack Sensor；The detected value that the multiple temperature sensor respectively provides is received, the detected value is executed and gives up processing for the first time, The first time gives up processing：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；Meter The first mean value of remaining detected value after giving up processing for the first time is calculated, and is based on first standard deviation of the first mean value computation, and Remaining detected value executes additional treatments after giving up processing to the first time, and the additional treatments include：Execution gives up and institute The detected value for first standard deviation that the absolute value of the difference for stating the first mean value is greater than prearranged multiple gives up processing for the second time； By the difference of the maxima and minima in remaining detected value after the additional treatments, it is determined as the temperature difference；
The valve control that commutates is generated based on the comparison result of the temperature difference and predetermined temperature difference threshold value keeps order or commutation Order；
The reversal valve is based on holding order and keeps water route direction to be to flow to second from first coolant connection Coolant connection, and it is cold to flow to first from second coolant connection by water route direction transformation to be based on the commutation command But liquid interface.
In one embodiment, the commutation valve control based on the temperature difference knot compared with predetermined temperature difference threshold value Fruit generates holding order or commutation command includes：When the temperature difference is greater than the predetermined temperature difference threshold value, the reversal valve control Device processed generates commutation command, and holding order is continuously generated in the predetermined time after the commutation command generating；
Water route direction transformation is being flowed into the first coolant liquid from second coolant connection based on the commutation command After interface, this method further includes：
When temperature difference appearance first reduces the variation increased again and when the temperature difference is greater than the predetermined temperature difference thresholding again When value, the commutation valve control generates the second commutation command；
It is from the first coolant connection stream that the reversal valve, which is based on second commutation command for water route direction transformation, To second coolant connection.
It can be seen from the above technical proposal that being arranged in embodiment of the present invention in multiple pre-positions of battery pack Multiple temperature sensors；The detected value that multiple temperature sensors respectively provide is received, and detected value is executed and gives up place for the first time Reason, giving up processing for the first time includes：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；Meter The first mean value of remaining detected value after giving up processing for the first time is calculated, is based on first the first standard deviation of mean value computation, and to first Secondary remaining detected value execution additional treatments after giving up processing, additional treatments include：Execution is given up exhausted with the difference of the first mean value Be greater than the detected value of the first standard deviation of prearranged multiple to value gives up processing for the second time；By detection remaining after additional treatments The difference of maxima and minima in value is determined as the battery pack temperature difference.The survey of sensor fault is excluded using statistics parameter Magnitude improves the correctness of the temperature difference.
Moreover, embodiment of the present invention realizes tandem heat management system pipeline scheme, flow homogeneity ensure that.
In addition, embodiment of the present invention is controlled using flow direction of the reversal valve to tandem water route, to reduce battery The system temperature difference.
Detailed description of the invention
Only illustratively description and explain the present invention for the following drawings, not delimit the scope of the invention.
Present invention determine that the method flow diagram of the battery pack temperature difference of new energy vehicle according to Fig. 1.
Present invention determine that the structure drawing of device of the battery pack temperature difference of new energy vehicle according to Fig. 2.
Fig. 3 is the first demonstrative structure figure according to new energy vehicle tandem heat management system of the present invention.
Fig. 4 is the heat management water route schematic diagram that reversal valve executes after switching operation in Fig. 3.
Fig. 5 is the first control flow schematic diagram according to new energy vehicle tandem heat management system of the present invention.
Fig. 6 is the second demonstrative structure figure according to new energy vehicle tandem heat management system of the present invention.
Fig. 7 is the heat management water route schematic diagram that reversal valve executes after switching operation in Fig. 6.
Fig. 8 is the second control flow schematic diagram according to new energy vehicle tandem heat management system of the present invention.
Specific embodiment
In order to which the technical features, objects and effects of invention are more clearly understood, the Detailed description of the invention present invention is now compareed Specific embodiment, identical label indicates identical part in the various figures.
It is succinct and intuitive in order to what is described, hereafter by describing several representative embodiments come to side of the invention Case is illustrated.A large amount of details is only used for helping to understand the solution of the present invention in embodiment.However, it will be apparent that of the invention Technical solution realize when can be not limited to these details.It is some in order to avoid unnecessarily having obscured the solution of the present invention Embodiment is not described meticulously, but only gives frame.Hereinafter, " comprising " refers to " including but not limited to ", " according to ... " refer to " according at least to ..., but be not limited to according only to ... ".Due to the speech habits of Chinese, do not have hereinafter When having the quantity for particularly pointing out an ingredient, it is meant that the ingredient is either one or more, or can be regarded as at least One.
Embodiment of the present invention proposes it is a kind of can spontaneous exclusion temperature sensor error the temperature difference (i.e. temperature difference) calculating Method, reduce temperature sensor itself error influences caused by temperature difference of the system by output.In embodiment of the present invention In, it is limited using the dynamic error under statistics parameter computing system current state, when temperature sensor measurement value exceeds dynamic threshold It when value, is abandoned, and when temperature sensor measurement value is beyond determining threshold value, is equally abandoned.
Present invention determine that the method flow diagram of the battery pack temperature difference of new energy vehicle according to Fig. 1.
As shown in Figure 1, this method includes：
Step 101：Multiple temperature sensors are arranged in multiple pre-positions of the battery pack.
Step 102：The detected value that the multiple temperature sensor respectively provides is received, and first is executed to the detected value Secondary to give up processing, the first time gives up processing and includes：Give up greater than the first predetermined threshold or lower than the second predetermined threshold Detected value.
Step 103：The first mean value for calculating remaining detected value after giving up processing for the first time, based on first mean value Calculate the first standard deviation, and remaining detected value executes additional treatments, the additional treatments packet after giving up processing to the first time It includes：Execute the detected value for giving up first standard deviation for being greater than prearranged multiple with the absolute value of the difference of first mean value Give up processing for the second time.
Step 104：By the difference of the maxima and minima in remaining detected value after the additional treatments, it is determined as described The battery pack temperature difference.
In one embodiment, execute it is described give up processing for the second time after, the additional treatments further include：It calculates It is described give up for the second time processing after remaining detected value the second mean value, be based on second standard deviation of the second mean value computation, and To it is described give up remaining detected value after processing for the second time and execute third time give up processing, the third time gives up processing and includes： Give up the detected value for being greater than second standard deviation of prearranged multiple with the absolute value of the difference of second mean value.Preferably, in advance Determining multiple is 3.
Embodiment of the present invention is illustrated below with reference to specific formula and mathematical definition.
It is assumed that being disposed with N number of sensor in battery pack, the temperature value of measurement is respectively：T1, T2 ... ... TN.Herein The measured value of any one sensor therein is referred to using Tn.
The temperature difference of battery pack is calculated by following below scheme：
The first step：It abandons beyond the measured value for determining threshold value：
Work as Tn>Tb0 or Tn<Ta0 gives up Tn；Tb0 and Ta0 herein is the thresholding based on determined by predetermined empirical value Value, wherein by screening out excessive temperature value compared with Tb0, by screening out too small temperature value compared with Ta0.
Assuming that having given up x measured value, remaining temperature value is：
Ta1, Ta2 ... ..., Ta (N-x)；
Second step：System mean μ after calculating preliminary treatmenta, wherein：
Third step：Computing system primary standard difference σa, wherein：
4th step：Abandon the measured value beyond 3 times of standard deviations：
Specifically, working as | Tan- μa|>3σaWhen, give up Tan, it is assumed that given up y measured value, remaining temperature value is：
Tb1, Tb2 ... ..., Tb (N-x-y)；
5th step:System mean μ after calculating secondary treatmentb, wherein:
6th step：Secondary calculating system standard difference σb, 3 times of standard deviations are defined as system dynamic error limit；Wherein：
7th step：It abandons beyond 3 times of standard deviation (i.e. 3 σb) measured value.
When | Tbn- μb|>3σbWhen, give up Tbn, it is assumed that given up z measured value, remaining temperature value is：
Tc1, Tc2 ... ..., Tc (N-x-y-z)；
8th step：Tc1, Tc2 ... ..., Tc (N-x-y-z) are sorted, maximum of T c is obtainedmaxWith minimum value Tcmin, two Person subtracts each other to obtain the temperature difference T of battery pack, wherein：
Δ T=Tcmax-Tcmin
As it can be seen that embodiment of the present invention utilizes the limits of error under statistics parameter computing system current state, it can be automatic The measurement value sensor for excluding faults itself guarantees the correctness of the system temperature difference being calculated.
Based on foregoing description, embodiment of the present invention also proposed the device of the battery pack temperature difference of determining new energy vehicle.
Present invention determine that the structure drawing of device of the battery pack temperature difference of new energy vehicle according to Fig. 2.
As shown in Fig. 2, the device includes：
Receiving module 201, for receiving the multiple temperature sensors arranged in multiple pre-positions of battery pack respectively The detected value of offer, and the detected value is executed and gives up processing for the first time, the first time gives up processing and includes：Give up big In the first predetermined threshold or lower than the detected value of the second predetermined threshold；
Computing module 202, for calculate give up processing for the first time after remaining detected value the first mean value, based on described the One the first standard deviation of mean value computation, and remaining detected value executes additional treatments after giving up processing to the first time, it is described attached The processing is added to include：Execute first standard deviation given up and be greater than prearranged multiple with the absolute value of the difference of first mean value Detected value gives up processing for the second time；
Determining module 203, for by the difference of the maxima and minima in remaining detected value after the additional treatments, really It is set to the battery pack temperature difference.
In one embodiment, computing module 202, for execute it is described give up processing for the second time after, further Calculate it is described give up for the second time processing after remaining detected value the second mean value, be based on second standard of the second mean value computation Difference, and to it is described give up remaining detected value after processing for the second time and execute third time give up processing, the third time gives up processing Including：Give up the detected value for being greater than second standard deviation of prearranged multiple with the absolute value of the difference of second mean value.
Can by embodiment of the present invention proposes determination new energy vehicle the battery pack temperature difference method be applied to it is various In heat management example.
In addition, it is found by the applicant that：The heat management system of current new energy vehicle generallys use cooling system in parallel, is difficult to guarantee Flow homogeneity, and flow homogeneity in actual use can be with originals such as system pipeline bending, compressing or internal incrustations Thus it is destroyed.
In addition, applicant further found that：Current existing series circuit scheme, flowing to for internal liquid is immutable, This is caused at present using the battery modules of series thermal pipes reason system schema, and internal difference in temperature is difficult to be controlled effectively, cause Excessive temperature differentials.Under extreme case, since the temperature of pipeline everywhere is different, it is original that heat management system can even increase battery system The temperature difference, adverse effect is caused to the temperature consistency of battery system.
A kind of new energy vehicle tandem heat management system is proposed in embodiment of the present invention, overcomes cooling system in parallel Flow heterogencity problem.
Moreover, in embodiments of the present invention, when battery thermal management system needs work, using reversal valve according to pipeline The variation of temperature difference everywhere adjusts pipeline flow direction, realizes the purpose for reducing the inside battery temperature difference.
Fig. 3 is the first demonstrative structure figure according to new energy vehicle tandem heat management system of the present invention.
As shown in figure 3, the system includes：
Water pump P 1；
Heating element；The water inlet of heating element is connected with the water outlet of water pump P 1；
Battery pack comprising multiple batteries, the first coolant connection K and arrangement comprising being arranged in the first side of battery pack The second coolant connection M in the opposite side of the first side；For heating each pipe of each water chamber of each battery in battery pack Road be serially connected (for example, in Fig. 3, water chamber 1, water chamber 2 to water chamber n pipeline be serially connected, the wherein connection of water chamber 1 first Coolant connection K, water chamber n the second coolant connection of connection M, n are the number of battery)；
Reversal valve V1, it is cooling with the water outlet of heating element, the water return outlet of water pump P 1, the first coolant connection K and second Liquid interface M is separately connected；
Temperature difference detecting element, for detecting in battery pack positioned at the battery of the first side and between the battery of opposite side Battery temperature it is poor；
Commutate valve control, generates for the comparison result based on battery temperature difference and predetermined temperature difference threshold value and keeps order Or commutation command；
Wherein reversal valve is based on that order is kept to keep water route direction to be to flow to the second coolant liquid from the first coolant connection K to connect Mouth M, and be to flow to the first coolant connection K from the second coolant connection M by water route direction transformation based on commutation command.
As it can be seen that the battery pack of embodiment of the present invention includes multiple batteries, it is used to heat each of each battery in battery pack Each pipeline of a water chamber is serially connected, therefore the present invention realizes a kind of new energy vehicle tandem heat management system, can be with Overcome the problems, such as the flow heterogencity of cooling system in parallel.
In one embodiment, reversal valve V1 may be embodied as solenoid directional control valve, servomotor driven change valve, electro-hydraulic reversing valve or Hand-operated direction valve, etc..
Preferably, reversal valve V1 is embodied as two-position four-way solenoid directional control valve, two six electric change valves, 3-position 4-way electricity Magnetic reversal valve or three six electric change valves, etc..
The above demonstration shows the specific example of reversal valve, it will be appreciated by those of skill in the art that this description is only It is exemplary, it is not intended to limit the present invention the protection scope of embodiment.
In one embodiment, commutate valve control, for being less than or equal to predetermined temperature difference threshold value when battery temperature difference Shi Shengcheng keeps order, when battery temperature difference is greater than predetermined temperature difference threshold value, generates commutation command, and generating commutation life Holding order is continuously generated in predetermined time after order.Therefore, by persistently giving birth to generating in the predetermined time after commutation command At keeping ordering, the switching that takes place frequently of reversal valve can be prevented.
Preferably, water route direction transformation is being flowed to from the second coolant connection M by the first coolant liquid based on commutation command After interface K, when the appearance of battery temperature difference first reduces the variation increased again and when battery temperature difference is greater than predetermined temperature difference door again When limit value, commutation valve control regenerates the second commutation command, and reversal valve is based on the second commutation command for water route direction transformation and is The second coolant connection M is flowed to from the first coolant connection K.
Preferably, heating element can be specifically embodied as ptc heater.When heating element is embodied as ptc heater When, the battery water route of new energy vehicle shown in FIG. 1 includes P1 water pump, heating element, reversal valve V1, battery pack, pipeline, Middle battery pack includes multiple batteries, and each pipeline for each water chamber for being used to heat each battery in battery pack is serially connected.This When, the course of work is as follows：
In the initial time of heat management system starting, water pump P 1 and ptc heater work, while reversal valve V1 is kept just Beginning state, heat management system can provide heat for battery pack.At this point, the flowing order of coolant liquid is as shown in Figure 1, be specially： Water outlet → ptc heater → reversal valve V1 A mouth → reversal valve V1 the first coolant liquid of C mouth → battery pack of water pump P 1 The second coolant connection of interface K → battery pack M → reversal valve V1 D mouth → reversal valve V1 B mouth → water pump P 1 return water Mouthful.In structure shown in Fig. 1, coolant liquid is heated in ptc heater first, and then first flow through battery pack first is cold But liquid interface K passes through the second coolant connection M of battery pack.That is the battery of the first side coolant connection K of battery pack is first It is first heated, is heated followed by the battery of the second side coolant connection M of battery pack.It is heated after a period of time Afterwards, since temperature unevenness also occur in the inhomogeneities of series pipe internal temperature, internal battery pack, battery is shown as Temperature is high near group water inlet and temperature is low near water outlet, i.e. the battery temperature of the first side coolant connection K is relatively high, And the battery temperature of the second side coolant connection M is relatively low.
The battery temperature that temperature difference detecting element persistently detects in battery pack is poor.Wherein, which can be managed Solution is absolute value.When the battery temperature poor (the abbreviation temperature difference) that temperature difference detecting element detects is less than or equal to scheduled threshold value a When, commutation valve control, which generates, keeps order, and reversal valve does not execute switching operation at this time.When temperature difference detecting element detects The temperature difference be greater than scheduled threshold value a when, commutation valve control generate commutation command, reversal valve V1 is commutated, battery pack is gone out Water inlet exchanges.
Temperature difference detecting element persistently detects the detailed process of the battery temperature difference in battery pack, including：In battery pack Multiple temperature sensors are arranged in multiple pre-positions；The detected value that multiple temperature sensors respectively provide is received, and to detection Value, which executes, gives up processing for the first time, and giving up processing for the first time includes：Give up greater than the first predetermined threshold or predetermined lower than second The detected value of threshold value；The first mean value for calculating remaining detected value after giving up processing for the first time, based on first mean value Calculate the first standard deviation, and remaining detected value executes additional treatments, the additional treatments packet after giving up processing to the first time It includes：Execute the detected value for giving up first standard deviation for being greater than prearranged multiple with the absolute value of the difference of first mean value Give up processing for the second time；By the difference of the maxima and minima in remaining detected value after the additional treatments, it is determined as temperature Difference.Preferably, after execution gives up processing for the second time, the additional treatments further include：It calculates and described gives up processing for the second time Second mean value of remaining detected value afterwards is based on second standard deviation of the second mean value computation, and gives up place for the second time to described Remaining detected value, which executes, after reason gives up processing for the third time, and the third time gives up processing and includes：Give up and second mean value Absolute value of the difference be greater than prearranged multiple second standard deviation detected value.
Fig. 4 is the heat management water route schematic diagram that reversal valve executes after switching operation in Fig. 3.
From fig. 4, it can be seen that being performed after switching operation, the flowing order of coolant liquid is adjusted to：The water outlet of water pump P 1 → heating element (such as ptc heater) → reversal valve V1 A mouth → reversal valve V1 the second coolant liquid of D mouth → battery pack The first coolant connection of interface M → battery pack K → reversal valve V1 C mouth → reversal valve V1 B mouth → water pump P 1 return water Mouthful.At this point, coolant liquid is heated in ptc heater first, the second coolant connection M of battery pack is then flowed through, then is flowed The first coolant connection K through battery pack.That is the second side coolant connection M battery of battery pack is heated first, then It is that the battery of the first side coolant connection K of battery pack is heated.After heating after a period of time, due in series pipe The inhomogeneities of portion's temperature, after so running a period of time, the battery temperature difference of internal battery pack will reduce (i.e. the first coolant liquid The battery temperature of the side interface K and the battery temperature of the second side coolant connection M gradually approach), keep state shown in Fig. 4 to continue Operation.Then, the temperature difference will become zero, i.e. the electricity of the battery temperature of the first side coolant connection K and the second side coolant connection M Pond temperature is identical, this state is kept to continue to run at this time, and the temperature difference will start from scratch increases (the electricity of the second side coolant connection M again Pond temperature gradually starts the battery temperature greater than the first side coolant connection M), when the temperature difference reaches greater than specified threshold a, Switching operation is executed again, and so on, until heat management system is closed.
Based on foregoing description, embodiment of the present invention proposes a kind of controls of new energy vehicle tandem heat management pipeline Method.Heat management pipeline includes：Water pump；Heating element, the water inlet of heating element are connected with the water outlet of water pump；Comprising more The battery pack of a battery, comprising being arranged in the first coolant connection of the first side of battery pack and being arranged in the opposite of the first side Each pipeline of second coolant connection of side, each water chamber in battery pack for heating each battery is serially connected；Commutation Valve is separately connected with the water outlet of heating element, the water return outlet of water pump, the first coolant connection and the second coolant connection；It should Method includes：
The first step：The battery temperature that temperature difference detecting element detects battery pack is poor.Specific detection mode is referred to Fig. 1 institute Show method flow.
Second step：The valve control that commutates is generated based on the comparison result of battery temperature difference and predetermined temperature difference threshold value keeps life Order or commutation command；
Third step：Reversal valve is based on that order is kept to keep water route direction to be to flow to the second coolant liquid from the first coolant connection Interface, and be to flow to the first coolant connection from the second coolant connection by water route direction transformation based on commutation command.
In one embodiment, commutate comparison result of the valve control based on battery temperature difference Yu predetermined temperature difference threshold value It generates holding order or commutation command includes：When battery temperature difference is less than or equal to predetermined temperature difference threshold value, commutate valve control It generates and keeps order.
In one embodiment, commutate comparison result of the valve control based on battery temperature difference Yu predetermined temperature difference threshold value It generates holding order or commutation command includes：When battery temperature difference is greater than the predetermined temperature difference threshold value, commutate valve control Commutation command is generated, and is continuously generated holding order in the predetermined time after commutation command generating.
It in one embodiment, by water route direction transformation is being that the is flowed to from the second coolant connection based on commutation command After one coolant connection, this method further includes：When the appearance of battery temperature difference first reduces the variation increased again and works as battery temperature When difference is greater than the predetermined temperature difference threshold value again, commutation valve control generates the second commutation command；Reversal valve is based on second and changes Water route direction transformation is flowed into the second coolant connection from the first coolant connection to order.
Fig. 5 is the first control flow schematic diagram according to new energy vehicle tandem heat management system of the present invention.
Process shown in Fig. 5 can be applied and Fig. 3 and handoff procedure shown in Fig. 4.The heating element can be specifically embodied as PTC heater.
As shown in figure 5, this method includes：
Step 501：The temperature T of battery pack is detected, for example temperature T can be the mean temperature of battery pack.
Step 502：When the temperature T of battery pack is greater than predetermined threshold A, it can be assumed that not needing to execute for battery pack Heat treatment executes step 508 and its subsequent step at this time；It, can be with when the temperature T of battery pack is small is equal to predetermined threshold A Identification needs to execute heat treatment for battery pack, executes step 503 and its subsequent step at this time.
Step 503：Water pump P 1 is opened, and starts ptc heater.At this point, water pump P 1 and ptc heater work, are changed simultaneously Original state is kept to valve V1, heat management system can provide heat for battery pack.At this point, the flowing order of coolant liquid is water Water outlet → ptc heater → reversal valve V1 A mouth → reversal valve V1 the first coolant liquid of C mouth → battery pack of pump P1 connects Mouth the second coolant connection of K → battery pack M → reversal valve V1 D mouth → reversal valve V1 B mouth → water pump P 1 water return outlet. Coolant liquid is heated in ptc heater first, is then first flowed through the first coolant connection K of battery pack, is passed through battery Second coolant connection M of group.That is the first side coolant connection K battery of battery pack is heated first, followed by battery The battery of second side coolant connection M of group is heated.After heating after a period of time, due to series pipe internal temperature Inhomogeneities, also there is temperature unevenness in internal battery pack, and showing as battery pack water inlet, nearby temperature is high and be discharged Temperature is low near mouthful, i.e. the battery temperature of the first side coolant connection K is high, and the battery temperature of the second side coolant connection M It is low.
Step 504：Temperature difference detecting element persistently detects the battery temperature difference dT of battery pack (for example, detection is closest to the The battery of one coolant connection K and detection are poor closest to the battery temperature between the battery of the second coolant connection).Wherein, should Battery temperature difference dT is understood to absolute value.The specific temperature difference detection mode of temperature difference detecting element is referred to stream shown in Fig. 1 Journey.
Step 505：When the temperature difference dT that temperature difference detecting element detects is less than scheduled threshold value B, reversal valve control Device, which generates, keeps order, and executes step 507：When the temperature difference dT that temperature difference detecting element detects is more than or equal to scheduled door When limit value a, commutation valve control generates commutation command, and executes step 506；
Step 506：Reversal valve V1 is commutated based on commutation command, exchanges battery pack water in-out port.That is, the flowing of coolant liquid Order is water outlet → ptc heater → reversal valve V1 A mouth → reversal valve V1 D mouth → battery pack second of water pump P 1 The first coolant connection of coolant connection M → battery pack K → reversal valve V1 C mouth → reversal valve V1 B mouth → water pump P 1 Water return outlet.Then, 501 are returned to step.
Step 507：Reversal valve V1 is based on that order is kept not execute switching operation, keeps the direction V1, the i.e. flowing of coolant liquid Order is still water outlet → ptc heater → reversal valve V1 A mouth → reversal valve V1 C mouth → battery pack of water pump P 1 The second coolant connection M of first coolant connection K → battery pack → reversal valve V1 D mouth → reversal valve V1 B mouth → water pump The water return outlet of P1.Then, 501 are returned to step.
Step 508：PTC is closed, switch off the pump P1, and return step 501.
Based on foregoing description, the present invention also proposes a kind of control device of new energy vehicle tandem heat management pipeline.Heat Managing pipeline includes：Water pump；Heating element, the water inlet of heating element are connected with the water outlet of the water pump；Include multiple electricity The battery pack in pond, comprising being arranged in the first coolant connection of the first side of the battery pack and being arranged in first side Each pipeline of second coolant connection of opposite side, each water chamber in the battery pack for heating each battery is mutual Series connection；Reversal valve, it is cooling with the water outlet of the heating element, the water return outlet of the water pump, the first coolant connection and second Liquid interface is separately connected；The control device includes：Temperature difference detecting element is located at the first side for detecting in the battery pack Battery and battery temperature between the battery of the opposite side it is poor；Commutate valve control, for being based on the battery temperature The comparison result of degree difference and predetermined temperature difference threshold value, which generates, keeps order or commutation command；Wherein the reversal valve is based on described Keeping order to keep water route direction is the second coolant connection to be flowed to from first coolant connection, and be based on the commutation Water route direction transformation is to flow to the first coolant connection from second coolant connection by order.
It is noted that be only a kind of typical structure of the invention shown in Fig. 3 and Fig. 4, it is all that reversal valve is added with water route of connecting Scheme, should all be considered as being contained in invention embodiment.Moreover, operating condition shown in Fig. 4 is only a kind of typical condition, it is all with Series connection water route adds the scheme of reversal valve, and no matter heat management system has the function of heating, refrigeration or only has liquid circulation, It should be considered as being contained in invention embodiment.
Fig. 6 is the second demonstrative structure figure according to new energy vehicle tandem heat management system of the present invention.
As shown in fig. 6, the system includes：
Water pump P 1；
Cooling element；The water inlet of cooling element is connected with the water outlet of water pump P 1；
Battery pack comprising multiple batteries, the first coolant connection K and arrangement comprising being arranged in the first side of battery pack The second coolant connection M in the opposite side of the first side；For cooling down each pipe of each water chamber of each battery in battery pack Road be serially connected (for example, in Fig. 4, water chamber 1, water chamber 2 to water chamber n pipeline be serially connected, the wherein connection of water chamber 1 first Coolant connection K, water chamber n the second coolant connection of connection M, n are the number of battery)；
Reversal valve V1, it is cooling with the water outlet of cooling element, the water return outlet of water pump P 1, the first coolant connection K and second Liquid interface M is separately connected；
Temperature difference detecting element, for detecting in battery pack positioned at the battery of the first side and between the battery of opposite side Battery temperature it is poor；
Commutate valve control, generates for the comparison result based on battery temperature difference and predetermined temperature difference threshold value and keeps order Or commutation command；
Wherein reversal valve is based on that order is kept to keep water route direction to be to flow to the second coolant liquid from the first coolant connection K to connect Mouth M, and be to flow to the first coolant connection K from the second coolant connection M by water route direction transformation based on commutation command.
As it can be seen that the battery pack of embodiment of the present invention includes multiple batteries, it is used to cool down each of each battery in battery pack Each pipeline of a water chamber is serially connected, therefore the present invention realizes a kind of new energy vehicle tandem heat management system, can be with Overcome the problems, such as the flow heterogencity of cooling system in parallel.
In one embodiment, reversal valve V1 may be embodied as solenoid directional control valve, servomotor driven change valve, electro-hydraulic reversing valve or Hand-operated direction valve, etc..Preferably, reversal valve V1 be embodied as two-position four-way solenoid directional control valve, two six electric change valves, Three-position four-way electromagnetic directional valve or three six electric change valves, etc..
The above demonstration shows the specific example of reversal valve, it will be appreciated by those of skill in the art that this description is only It is exemplary, it is not intended to limit the present invention the protection scope of embodiment.
In one embodiment, commutate valve control, for being less than or equal to predetermined temperature difference threshold value when battery temperature difference Shi Shengcheng keeps order, when battery temperature difference is greater than predetermined temperature difference threshold value, generates commutation command, and generating commutation life Holding order is continuously generated in predetermined time after order.
Therefore, by generate be continuously generated in the predetermined time after commutation command holding order, reversal valve can be prevented The switching that takes place frequently.
Preferably, cooling element can be specifically embodied as cooling-water machine.When heating element is embodied as cooling-water machine, Fig. 4 Shown in the battery water route of new energy vehicle include P1 water pump, cooling-water machine, reversal valve V1, battery pack, pipeline, wherein battery pack Comprising multiple batteries, each pipeline of each water chamber in battery pack for cooling down each battery is serially connected.At this point, work Process is as follows：
In the initial time of heat management system starting, water pump P 1 and cooling-water machine work, while reversal valve V1 keeps initial shape State, heat management system can provide refrigerant for battery pack.At this point, the flowing order of coolant liquid is as shown in figure 4, be specially：Water pump The first coolant connection K of water outlet → cooling-water machine → reversal valve V1 A mouth → reversal valve V1 C mouth → battery pack of P1 → The second coolant connection M → reversal valve V1 D mouth → reversal valve V1 B mouth → water pump P 1 water return outlet of battery pack.At this point, Coolant liquid is cooled first in cooling-water machine, then first flows through the first coolant connection K of battery pack, passes through battery pack Second coolant connection M.I.e. the first side coolant connection K battery of battery pack is cooled first, followed by the of battery pack The battery of two sides coolant connection M is cooled down.After cooling down after a period of time, due to the unevenness of series pipe internal temperature Also there is temperature unevenness in even property, internal battery pack, show as battery pack water inlet nearby temperature it is low and near water outlet Temperature is high, i.e. the battery temperature of the first side coolant connection K is relatively low, and the battery temperature phase of the second side coolant connection M To higher.
The battery temperature that temperature difference detecting element persistently detects battery pack is poor (for example, detection connects closest to the first coolant liquid The battery of mouthful K and poor closest to the battery temperature between the battery of the second coolant connection).Wherein, which can be with It is understood to absolute value.Specifically, the process that temperature difference detecting element persistently detects the battery temperature difference of battery pack includes：? Multiple temperature sensors are arranged in multiple pre-positions of battery pack；The detected value that multiple temperature sensors respectively provide is received, The detected value is executed and gives up processing for the first time, the first time gives up processing and includes：Give up and is greater than the first predetermined threshold Or the detected value lower than the second predetermined threshold；Calculate the first mean value of remaining detected value after giving up processing for the first time, and base In first standard deviation of the first mean value computation, and after giving up processing to the first time, remaining detected value executes additional place Reason, the additional treatments include：It executes to give up and is greater than described the first of prearranged multiple with the absolute value of the difference of first mean value The detected value of standard deviation gives up processing for the second time；By the maximum value and minimum in remaining detected value after the additional treatments The difference of value, is determined as the temperature difference.
When the battery temperature that temperature difference detecting element detects poor (the abbreviation temperature difference) is less than or equal to scheduled threshold value a, The valve control that commutates, which generates, keeps order, and reversal valve does not execute switching operation at this time.When the temperature that temperature difference detecting element detects When difference is greater than scheduled threshold value a, commutation valve control generates commutation command, and reversal valve V1 is commutated, battery pack is entered and left The mouth of a river exchanges.
Fig. 7 is the heat management water route schematic diagram that reversal valve executes after switching operation in Fig. 6.
As seen from Figure 7, it is performed after switching operation, the flowing order of coolant liquid is adjusted to：The water outlet of water pump P 1 → cooling-water machine → reversal valve V1 A mouth → reversal valve V1 the second coolant connection of D mouth → battery pack M → battery pack One coolant connection K → reversal valve V1 C mouth → reversal valve V1 B mouth → water pump P 1 water return outlet.At this point, coolant liquid is first It is cooled down in cooling-water machine, then flows through the second coolant connection M of battery pack, pass through the first coolant liquid of battery pack Interface K.That is the second side coolant connection M battery of battery pack obtains cooling first, followed by the first coolant liquid of battery pack The battery of the side interface K is cooled down.After cooling down after a period of time, due to the inhomogeneities of series pipe internal temperature, so After running a period of time, the battery temperature difference of internal battery pack will reduce (the i.e. battery temperature of the first side coolant connection K and the The battery temperature of two sides coolant connection M gradually approaches), keep this state to continue to run.Then the temperature difference will become zero, i.e., and The battery temperature of one side coolant connection K is identical as the battery temperature of the second side coolant connection M, keep at this time this state after Reforwarding row, the temperature difference will be started from scratch and be increased again, and (it is cooling that the battery temperature of the second side coolant connection M gradually begins lower than first The battery temperature of the side liquid interface M), when the temperature difference reaches greater than specified threshold a, then switching operation is executed, and so on, directly It is closed to heat management system.
Based on foregoing description, the invention also provides a kind of control methods of new energy vehicle tandem heat management pipeline. The heat management pipeline includes：Water pump；Cooling element, the water inlet of the cooling element are connected with the water outlet of the water pump； Battery pack comprising multiple batteries, comprising being arranged in the first coolant connection of the first side of the battery pack and being arranged in institute The second coolant connection of the opposite side of the first side is stated, is used to cool down each of each water chamber of each battery in the battery pack A pipeline is serially connected；Reversal valve, with the water outlet of the cooling element, the water return outlet of the water pump, the first coolant connection It is separately connected with the second coolant connection；This method includes：
The first step：The battery temperature that temperature difference detecting element detects battery pack is poor, and concrete mode is referred to side shown in Fig. 1 Method process.
Second step：The valve control that commutates is generated based on the comparison result of the battery temperature difference and predetermined temperature difference threshold value to be protected Hold order or commutation command.
Third step：The reversal valve is based on holding order and keeps water route direction to be from the first coolant connection stream It is to be flowed to from second coolant connection by water route direction transformation to the second coolant connection, and based on the commutation command First coolant connection.
In one embodiment, the commutation valve control is based on the battery temperature difference and predetermined temperature difference threshold value Comparison result generates holding order or commutation command includes：When the battery temperature difference is less than or equal to the predetermined temperature difference thresholding When value, the commutation valve control, which generates, keeps order.In one embodiment, the commutation valve control is based on described The comparison result of battery temperature difference and predetermined temperature difference threshold value generates holding order or commutation command includes：When the battery temperature When degree difference is greater than the predetermined temperature difference threshold value, the commutation valve control generates commutation command, and is generating the commutation life Holding order is continuously generated in predetermined time after order.
In one embodiment, water route direction transformation is connect from second coolant liquid based on the commutation command Mouth flows to after the first coolant connection, and this method further includes：When battery temperature difference appearance first reduces the variation increased again And when the battery temperature difference is greater than the predetermined temperature difference threshold value again, the commutation valve control generates the second commutation Order；It is to flow to from first coolant connection that the reversal valve, which is based on second commutation command for water route direction transformation, Second coolant connection.
Fig. 8 is the second control flow schematic diagram according to new energy vehicle tandem heat management system of the present invention.
Process shown in Fig. 8 can be applied and Fig. 6 and handoff procedure shown in Fig. 7.At this point, the cooling element can be specifically real It applies as cooling-water machine.
As shown in figure 8, this method includes：
Step 801：The temperature T of battery pack is detected, for example temperature T can be the mean temperature of battery pack.
Step 802：When the temperature T of battery pack is less than predetermined threshold A, it can be assumed that not needing to execute for battery pack Cooling treatment executes step 808 at this time；When the temperature T of battery pack is more than or equal to predetermined threshold A, it can be assumed that needing needle Cooling treatment is executed to battery pack, executes step 803 and its subsequent step at this time.
Step 803：Water pump P 1 is opened, and starts cooling-water machine.At this point, water pump P 1 and cooling-water machine work, while reversal valve V1 Original state is kept, heat management system can provide refrigerant for battery pack.At this point, the flowing order of coolant liquid is water pump P 1 Water outlet → cooling-water machine → reversal valve V1 A mouth → reversal valve V1 the first coolant connection of C mouth → battery pack K → battery The second coolant connection M → reversal valve V1 D mouth → reversal valve V1 B mouth → water pump P 1 water return outlet of group.At this point, cooling Liquid is cooled first in cooling-water machine, then first flows through the first coolant connection K of battery pack, passes through the second of battery pack Coolant connection M.I.e. the first side coolant connection K battery of battery pack is cooled first, cold followed by the second of battery pack But the battery of the side liquid interface M is cooled down.After cooling down after a period of time, due to the inhomogeneities of series pipe internal temperature, Also there is temperature unevenness in internal battery pack, shows as battery pack water inlet nearby temperature is low and the neighbouring temperature of water outlet The battery temperature of height, i.e. the first side coolant connection K is low, and the battery temperature of the second side coolant connection M is high.
Step 804：Temperature difference detecting element persistently detects the temperature difference dT of battery pack (for example, detection is cold closest to first But the battery of liquid interface K and detection are poor closest to the battery temperature between the battery of the second coolant connection).Wherein, the temperature Difference is construed as absolute value.
Step 805：When the temperature difference dT that temperature difference detecting element detects is less than scheduled threshold value B, reversal valve control Device, which generates, keeps order, and executes step 807：When the temperature difference dT that temperature difference detecting element detects is more than or equal to scheduled door When limit value a, commutation valve control generates commutation command, and executes step 806；
Step 806：Reversal valve commutation command commutates reversal valve V1, exchanges battery pack water in-out port.That is, coolant liquid Flow water outlet → cooling-water machine → reversal valve V1 A mouth → reversal valve V1 D mouth → battery pack second that order is water pump P 1 The first coolant connection of coolant connection M → battery pack K → reversal valve V1 C mouth → reversal valve V1 B mouth → water pump P 1 Water return outlet.Then, 801 are returned to step.
Step 807：Reversal valve is based on that order is kept not execute switching operation, keeps the direction V1, the i.e. flowing of coolant liquid time Sequence is still water outlet → cooling-water machine → reversal valve V1 A mouth → reversal valve V1 C mouth → battery pack first of water pump P 1 The second coolant connection of coolant connection K → battery pack M → reversal valve V1 D mouth → reversal valve V1 B mouth → water pump P 1 Water return outlet.Then, 601 are returned to step.
Step 808：Cooling-water machine is closed, switch off the pump P1, and return step 801.
Based on foregoing description, embodiment of the present invention also proposed a kind of control of new energy vehicle tandem heat management pipeline Device processed.Heat management pipeline includes：Water pump；Cooling element, the water outlet string of the water inlet of the cooling element and the water pump Connection；Battery pack comprising multiple batteries, comprising being arranged in the first coolant connection of the first side of the battery pack and being arranged in Second coolant connection of the opposite side of first side, for cooling down each water chamber of each battery in the battery pack Each pipeline is serially connected；Reversal valve connects with the water outlet of the cooling element, the water return outlet of the water pump, the first coolant liquid Mouth and the second coolant connection are separately connected；Described device includes：Temperature difference detecting element, for detecting in the battery pack Battery temperature positioned at the battery of the first side and between the battery of the opposite side is poor；Commutate valve control, for being based on The comparison result of the battery temperature difference and predetermined temperature difference threshold value, which generates, keeps order or commutation command；The wherein commutation It is to flow to the second coolant connection, and base from first coolant connection that valve base, which orders holding water route direction in the holding, Water route direction transformation is flowed into the first coolant connection from second coolant connection in the commutation command.
It is noted that be only a kind of typical structure of the invention shown in Fig. 6 and Fig. 7, it is all that reversal valve is added with water route of connecting Scheme, should all be considered as being contained in invention embodiment.Moreover, operating condition shown in Fig. 6 and Fig. 7 is only a kind of typical condition, All schemes for adding reversal valve with water route of connecting, and no matter heat management system is with heating, refrigeration or only with liquid circulation Function should all be considered as being contained in invention embodiment.
Can by embodiment of the present invention proposes tandem heat management system be applied in various new-energy automobiles, such as Mixed power electric car (HEV), pure electric automobile (BEV), fuel cell electric vehicle (FCEV) and other new energy are (such as The high-efficiency energy storage vehicles such as supercapacitor, flywheel) automobile etc..
In conclusion arranging multiple temperature sensors in multiple pre-positions of battery pack in embodiment of the present invention； The detected value that multiple temperature sensors respectively provide is received, and detected value is executed and gives up processing for the first time, gives up place for the first time Reason includes：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；It calculates and gives up processing for the first time First mean value of remaining detected value afterwards, is based on first the first standard deviation of mean value computation, and remaining after processing to giving up for the first time Detected value execute additional treatments, additional treatments include：Execution, which is given up, is greater than prearranged multiple with the absolute value of the difference of the first mean value The detected value of the first standard deviation give up processing for the second time；By the maximum value in detected value remaining after additional treatments and most The difference of small value is determined as the battery pack temperature difference.The measured value that sensor fault is excluded using statistics parameter, improves the temperature difference Correctness.
Moreover, embodiment of the present invention realizes tandem heat management system pipeline scheme, flow homogeneity ensure that.
In addition, embodiment of the present invention is controlled using flow direction of the reversal valve to tandem water route, to reduce battery The system temperature difference.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically Protection scope that is bright, and being not intended to limit the invention, it is all without departing from equivalent embodiments made by technical spirit of the present invention or Change, such as the combination, segmentation or repetition of feature, should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of method of the battery pack temperature difference of determining new energy vehicle, which is characterized in that including：
Multiple temperature sensors are arranged in multiple pre-positions of the battery pack；
The detected value that the multiple temperature sensor respectively provides is received, and the detected value is executed and gives up processing for the first time, The first time gives up processing：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；
The first mean value of remaining detected value after giving up processing for the first time is calculated, first standard of the first mean value computation is based on Difference, and remaining detected value executes additional treatments after giving up processing to the first time, the additional treatments include：Execution is given up Be greater than the detected value of first standard deviation of prearranged multiple with the absolute value of the difference of first mean value gives up place for the second time Reason；
By the difference of the maxima and minima in remaining detected value after the additional treatments, it is determined as the battery pack temperature difference.
2. the method for the battery pack temperature difference of determining new energy vehicle according to claim 1, which is characterized in that executing institute It states after giving up processing for the second time, the additional treatments further include：
Calculate it is described give up for the second time processing after remaining detected value the second mean value, based on second mean value computation second mark It is quasi- poor, and to it is described give up remaining detected value after processing for the second time and execute give up processing for the third time, the third time gives up place Reason includes：Give up the detected value for being greater than second standard deviation of prearranged multiple with the absolute value of the difference of second mean value.
3. the method for the battery pack temperature difference of determining new energy vehicle according to claim 1 or 2, which is characterized in that described Prearranged multiple is 3.
4. a kind of device of the battery pack temperature difference of determining new energy vehicle, which is characterized in that including：
Receiving module is respectively provided for receiving in multiple temperature sensors that multiple pre-positions of the battery pack are arranged Detected value, and to the detected value execute for the first time give up processing, the first time gives up processing and includes：Give up and is greater than first Predetermined threshold or detected value lower than the second predetermined threshold；
Computing module gives up the first mean value of remaining detected value after processing for calculating first time, is based on first mean value Calculate the first standard deviation, and remaining detected value executes additional treatments, the additional treatments after giving up processing to the first time Including：Execute the detected value for giving up first standard deviation for being greater than prearranged multiple with the absolute value of the difference of first mean value Give up processing for the second time；
Determining module, for being determined as institute for the difference of the maxima and minima in remaining detected value after the additional treatments State the battery pack temperature difference.
5. the device of the battery pack temperature difference of determining new energy vehicle according to claim 4, which is characterized in that
Computing module, for execute it is described give up processing for the second time after, further calculate it is described give up processing for the second time after Second mean value of remaining detected value is based on second standard deviation of the second mean value computation, and gives up processing for the second time to described Remaining detected value, which executes, afterwards gives up processing for the third time, and the third time gives up processing and includes：Give up and second mean value Absolute value of the difference is greater than the detected value of second standard deviation of prearranged multiple.
6. a kind of control method of new energy vehicle tandem heat management pipeline, which is characterized in that the heat management pipeline includes： Water pump；Heating element, the water inlet of the heating element are connected with the water outlet of the water pump；Battery comprising multiple batteries Group, comprising be arranged in the first coolant connection of the first side of the battery pack and be arranged in first side opposite side the Each pipeline of two coolant connections, each water chamber in the battery pack for heating each battery is serially connected；Reversal valve, Connect respectively with the water outlet of the heating element, the water return outlet of the water pump, the first coolant connection and the second coolant connection It connects；This method includes：
The temperature difference of the battery pack is detected, including：Multiple temperature sensors are arranged in multiple pre-positions of the battery pack； The detected value that the multiple temperature sensor respectively provides is received, and the detected value is executed and gives up processing for the first time, it is described Giving up processing for the first time includes：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；Calculate the Once give up the first mean value of remaining detected value after handling, is based on first standard deviation of the first mean value computation, and to described Remaining detected value executes additional treatments after giving up processing for the first time, and the additional treatments include：Execution is given up and described first The detected value that the absolute value of the difference of mean value is greater than first standard deviation of prearranged multiple gives up processing for the second time；It will be described attached The difference for adding the maxima and minima after handling in remaining detected value, is determined as the temperature difference；
The valve control that commutates is generated based on the comparison result of the temperature difference and predetermined temperature difference threshold value keeps order or commutation command；
The reversal valve is based on holding order and keeps water route direction to be to flow to the second cooling from first coolant connection Liquid interface, and be to flow to the first coolant liquid from second coolant connection to connect by water route direction transformation based on the commutation command Mouthful.
7. the control method of new energy vehicle tandem heat management pipeline according to claim 6, which is characterized in that described Commutation valve control generates holding order based on the comparison result of the temperature difference and predetermined temperature difference threshold value or commutation command includes：
When the temperature difference is greater than the predetermined temperature difference threshold value, the commutation valve control generation commutation command, and Holding order is continuously generated in predetermined time after generating the commutation command.
8. the control method of new energy vehicle tandem heat management pipeline according to claim 7, which is characterized in that in base After water route direction transformation is to flow to the first coolant connection from second coolant connection by the commutation command, the party Method further includes：
When temperature difference appearance first reduces the variation increased again and when the temperature difference is greater than the predetermined temperature difference threshold value again, The commutation valve control generates the second commutation command；
The reversal valve is based on second commutation command and water route direction transformation is flowed to institute from first coolant connection State the second coolant connection.
9. a kind of control method of new energy vehicle tandem heat management pipeline, which is characterized in that the heat management pipeline includes： Water pump；Cooling element, the water inlet of the cooling element are connected with the water outlet of the water pump；Battery comprising multiple batteries Group, comprising be arranged in the first coolant connection of the first side of the battery pack and be arranged in first side opposite side the Each pipeline of two coolant connections, each water chamber in the battery pack for cooling down each battery is serially connected；Reversal valve, Connect respectively with the water outlet of the cooling element, the water return outlet of the water pump, the first coolant connection and the second coolant connection It connects；This method includes：
The temperature difference of the battery pack is detected, including：Multiple temperature sensors are arranged in multiple pre-positions of the battery pack； The detected value that the multiple temperature sensor respectively provides is received, the detected value is executed and gives up processing for the first time, described the Once giving up processing includes：Give up and is greater than the first predetermined threshold or the detected value lower than the second predetermined threshold；Calculate first Secondary the first mean value for giving up remaining detected value after processing, and it is based on first standard deviation of the first mean value computation, and to described Remaining detected value executes additional treatments after giving up processing for the first time, and the additional treatments include：Execution is given up and described first The detected value that the absolute value of the difference of mean value is greater than first standard deviation of prearranged multiple gives up processing for the second time；It will be described attached The difference for adding the maxima and minima after handling in remaining detected value, is determined as the temperature difference；
The valve control that commutates is generated based on the comparison result of the temperature difference and predetermined temperature difference threshold value keeps order or commutation command；
The reversal valve is based on holding order and keeps water route direction to be to flow to the second cooling from first coolant connection Liquid interface, and be to flow to the first coolant liquid from second coolant connection to connect by water route direction transformation based on the commutation command Mouthful.
10. the control method of new energy vehicle tandem heat management pipeline according to claim 9, which is characterized in that institute It states commutation valve control and holding order or commutation command packet is generated based on the comparison result of the temperature difference and predetermined temperature difference threshold value It includes：When the temperature difference is greater than the predetermined temperature difference threshold value, the commutation valve control generates commutation command, and is generating institute Holding order is continuously generated in predetermined time after stating commutation command；
Water route direction transformation is being flowed into the first coolant connection from second coolant connection based on the commutation command Later, this method further includes：
When temperature difference appearance first reduces the variation increased again and when the temperature difference is greater than the predetermined temperature difference threshold value again, The commutation valve control generates the second commutation command；
The reversal valve is based on second commutation command and water route direction transformation is flowed to institute from first coolant connection State the second coolant connection.
CN201810371214.8A 2018-04-24 2018-04-24 Method and device for determining battery pack temperature difference of new energy vehicle and control method Active CN108878995B (en)

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