CN109599622A - The temperature control method and humidity control system of on-vehicle battery - Google Patents

The temperature control method and humidity control system of on-vehicle battery Download PDF

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Publication number
CN109599622A
CN109599622A CN201710923284.5A CN201710923284A CN109599622A CN 109599622 A CN109599622 A CN 109599622A CN 201710923284 A CN201710923284 A CN 201710923284A CN 109599622 A CN109599622 A CN 109599622A
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China
Prior art keywords
battery
temperature
heat exchanger
thermal management
management module
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Granted
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CN201710923284.5A
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CN109599622B (en
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伍星驰
谈际刚
王洪军
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BYD Co Ltd
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BYD Co Ltd
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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
    • H01M10/613—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
    • 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
    • H01M10/6564—Gases with forced flow, e.g. by blowers using compressed gas
    • 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
    • H01M10/60—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
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • 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)
  • Automation & Control Theory (AREA)

Abstract

The invention discloses a kind of temperature control method of on-vehicle battery and humidity control systems, and the system comprises multiple battery thermal management modules that the heat exchange flow path with multiple batteries is respectively connected with；The multiple heat exchangers being connected respectively with multiple battery thermal management modules；The multiple compressors being connected respectively with multiple heat exchangers；Balanced heat exchanger, wherein a part in multiple battery thermal management modules is connected with the first pipeline in balanced heat exchanger, and another part in multiple battery thermal management modules is connected with the second pipeline in balanced heat exchanger；Controller for obtaining the temperature of multiple batteries, and judges whether the temperature difference between multiple batteries is greater than preset temperature threshold, when the temperature difference between multiple batteries is greater than preset temperature threshold, is carried out by temperature of the balanced heat exchanger to multiple batteries balanced.The system can be carried out by temperature of the heat exchanger to multiple batteries, so as to improve the cycle life of battery when the temperature difference between multiple batteries is larger as a result,.

Description

The temperature control method and humidity control system of on-vehicle battery
Technical field
The present invention relates to automobile technical field, in particular to a kind of temperature control method of on-vehicle battery, one kind are non-provisional Property computer readable storage medium and a kind of humidity control system of on-vehicle battery.
Background technique
Currently, on-vehicle battery system may include multiple batteries in electric car, due to position between each battery Difference, or each battery is supplied to due to the humidity control system of battery plus hot/cold power it is uneven, lead to each electricity There are larger differences for temperature between pond, and the temperature consistency of battery is poor, and then will lead to battery cycle life reduction.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of humidity control system of on-vehicle battery, which can be with When temperature difference between multiple batteries is larger, carried out by temperature of the heat exchanger to multiple batteries, so as to improve electricity The cycle life in pond.
Second object of the present invention is to propose a kind of humidity control system of on-vehicle battery.
Third object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of humidity control system of on-vehicle battery, It include: the multiple battery thermal management modules being respectively connected with multiple batteries；It is connected respectively with the multiple battery thermal management module Multiple heat exchangers；The multiple compressors being connected respectively with the multiple heat exchanger；It is equal with the multiple battery thermal management module Balanced heat exchanger connected and with the multiple heat exchanger parallel connection, wherein one in the multiple battery thermal management module Point be connected with the first pipeline in the balanced heat exchanger, another part in the multiple battery thermal management module with it is described equal The second pipeline in weighing apparatus heat exchanger is connected；Controller, the controller are used to obtain the temperature of the multiple battery, and judge institute State whether the temperature difference between multiple batteries is greater than preset temperature threshold, the temperature difference between the multiple battery is greater than default When temperature threshold, the temperature of the multiple battery is carried out by the balanced heat exchanger balanced.
The humidity control system of on-vehicle battery according to an embodiment of the present invention by obtaining the temperature of multiple batteries, and is sentenced Whether the temperature difference broken between multiple batteries is greater than preset temperature threshold, if temperature difference is greater than the preset temperature threshold, It is carried out by temperature of the balanced heat exchanger to multiple batteries balanced.The system can be in the temperature difference between multiple batteries as a result, When larger, carried out by temperature of the heat exchanger to multiple batteries, so as to improve the cycle life of battery.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of temperature control method of on-vehicle battery, The following steps are included: obtaining the temperature of the multiple battery；It is default to judge whether the temperature difference between the multiple battery is greater than Temperature threshold；If it is greater than the preset temperature threshold, then by the balanced heat exchanger to the temperature of the multiple battery into Row is balanced.
The temperature control method of on-vehicle battery according to an embodiment of the present invention obtains the temperature of multiple batteries, then first Judge whether the temperature difference between multiple batteries is greater than preset temperature threshold, if it is greater than preset temperature threshold, then passes through equilibrium Heat exchanger carries out the temperature of multiple batteries balanced.This method can lead to when the temperature difference between multiple batteries is larger as a result, Balanced heat exchanger is crossed to carry out, so as to improve the cycle life of battery the temperature of multiple batteries.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of non-transitory computer-readable storage medium Matter is stored thereon with computer program, which realizes above-mentioned temperature control method when being executed by processor.
The non-transitorycomputer readable storage medium of the embodiment of the present invention obtains the temperature of multiple batteries, then first Judge whether the temperature difference between multiple batteries is greater than preset temperature threshold, if it is greater than preset temperature threshold, then passes through equilibrium Heat exchanger carries out equilibrium to the temperature of multiple batteries, when larger so as to the temperature difference between multiple batteries, passes through equilibrium Heat exchanger carries out, so as to improve the cycle life of battery the temperature of multiple batteries.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments Obviously and it is readily appreciated that, wherein
Fig. 1 a-1b is the block diagram of the humidity control system of on-vehicle battery according to an embodiment of the invention；
Fig. 2 is the control topological diagram of the humidity control system of on-vehicle battery according to an embodiment of the invention；
Fig. 3 is the block diagram of the humidity control system of on-vehicle battery in accordance with another embodiment of the present invention；
Fig. 4 is the schematic diagram of air outlet according to an embodiment of the invention；
Fig. 5 is the block diagram of the humidity control system of the on-vehicle battery of another embodiment according to the present invention；
Fig. 6 is the flow chart of the temperature control method of on-vehicle battery according to an embodiment of the invention；
Fig. 7 is the flow chart of the temperature control method of on-vehicle battery in accordance with another embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition on-vehicle battery temperature control method, non-transitory meter The humidity control system of calculation machine readable storage medium storing program for executing and on-vehicle battery.
Fig. 1 a-1b is the structural schematic diagram of the humidity control system of on-vehicle battery according to an embodiment of the invention.Side Frame schematic diagram.As shown in Fig. 1 a-1b, which includes: the multiple battery thermals being respectively connected with the heat exchange flow path of multiple batteries Reason module, be connected with multiple battery thermal management modules multiple heat exchangers, be connected respectively with multiple heat exchangers multiple compressors, The balanced heat exchanger 3 connected and in parallel with multiple heat exchangers with multiple battery thermal management modules, controller are (in figure not specifically It shows).
Wherein, a part in multiple battery thermal management modules is connected with the first pipeline in balanced heat exchanger, Duo Ge electricity Another part in the thermal management module of pond and the second pipeline in balanced heat exchanger.Controller is connect with battery thermal management module, For obtaining the temperature of multiple batteries, and judge whether the temperature difference between multiple batteries is greater than preset temperature threshold, multiple When temperature difference between battery is greater than preset temperature threshold, carried out by temperature of the balanced heat exchanger to multiple batteries balanced.In advance If temperature threshold can be preset according to the actual situation, such as can be 8 DEG C.
Further, as shown in Fig. 1 a-1b, battery includes the first battery 41 and the second battery 42, and compressor includes first Compressor 11 and the second compressor 12, heat exchanger include First Heat Exchanger 21 and the second heat exchanger 22, battery thermal management module packet The first battery thermal management module 51 and the second battery thermal management module 52 are included, the first end of the first battery thermal management module 51 passes through First triple valve 61 is connected with the first end of the first pipeline in the first end of First Heat Exchanger 21 and balanced heat exchanger 3 respectively, the The second end of one battery thermal management module 51 by the second triple valve 62 respectively with the second end of First Heat Exchanger 21 and balanced change The second end of first pipeline is connected in hot device 3, and the first end of the second battery thermal management module 52 is distinguished by third triple valve 63 It is connected with the first end of the second pipeline in the first end of the second heat exchanger 22 and balanced heat exchanger 3, the second battery thermal management module 52 second end by the 4th triple valve 64 respectively with the second pipeline in the second end of the second heat exchanger 22 and balanced heat exchanger 3 Second end is connected, wherein controller passes through balanced heat exchanger 3 by first to fourth triple valve 61-64 of control to multiple electricity The temperature in pond carries out balanced.
Specifically, battery, which refers to, is installed on vehicle, and provides power output for vehicle and is that other electricity consumptions on vehicle are set It is standby that the energy storage device of electricity is provided, it can be repeatedly charged.Battery can be battery pack or battery modules.
In an embodiment of the present invention, as shown in Fig. 1 a-1b, battery thermal management module may include setting on heat exchange flow path Pump 502, the first temperature sensor 504, second temperature sensor 505 and flow sensor 506, pump the 502, first temperature pass Sensor 504, second temperature sensor 505 and flow sensor 506 are connect with controller；Wherein: pump 502 is for making the flow path that exchanges heat In media flow；First temperature sensor 504 is used to detect the inlet temperature for the medium for flowing into on-vehicle battery；Second temperature passes Sensor 505 is used to detect the outlet temperature of the medium of outflow on-vehicle battery；Flow sensor 506 is for detecting in heat exchange flow path The flow velocity of medium.
Further, as shown in Fig. 1 a-1b, battery thermal management module can also include the medium being arranged on heat exchange flow path Container 503, media Containers 503 are for storing and providing medium to heat exchange flow path.Battery thermal management module can also include setting Heater 501 on heat exchange flow path, heater 501 are connect with controller, for heating the medium in heat exchange flow path.
As shown in Fig. 1 a-1b, balanced heat exchanger 3 can be plate heat exchanger, and two pipelines in balanced heat exchanger 3 are mutual Independently close on setting.As shown in Fig. 2, controller may include battery manager and battery thermal management device, battery manager is used for Battery is managed, can detecte the information such as the voltage, electric current, temperature of each battery, when the temperature difference between battery is super When crossing preset temperature threshold, battery manager sends battery temperature equalization function and starts information, when the temperature difference between battery It meets the requirements, such as when the temperature difference between battery is less than 3 DEG C, issues battery temperature equilibrium and complete information.Battery manager CAN (Controller Area Network, controller local area network) communication can be carried out with battery thermal management device, when two There are when the larger temperature difference between battery, such as the temperature difference is more than 8 DEG C, and battery manager sends battery temperature equalization function and starts information To battery thermal management device, battery thermal management device controls battery thermal management module and starts work, and controls first to fourth threeway 61- 64 channel 1 is connected, and channel 2 is closed, so that the media flow in the first pipeline and the second pipeline.
As shown in Figure 1a, wherein in the first pipeline media flow direction are as follows: balanced the 3-the first battery thermal management of heat exchanger Module 41-battery thermal management of the 51-the first battery module 51-equilibrium heat exchanger 3, specifically: balanced heat exchanger 3-the two or three 62-heater of port valve 501-pump, 502-the first 41-second temperature sensor of the 504-the first battery of temperature sensor 505- The 503-the first triple valve of 506-media Containers of flow sensor 61-equilibrium heat exchanger 3；The flowing side of medium in second pipeline To are as follows: the 52-the first battery 42-battery thermal management, the 52-equilibrium of module of balanced the 3-the second battery thermal management of heat exchanger module is changed Hot device 3, specifically: the 502-the first temperature sensor of balanced 3-the four 64-heater of triple valve of heat exchanger, 501-pump 504-the second battery 42-second temperature sensor, 505-flow sensor, 506-media Containers, 503-third triple valve 63 - equilibrium heat exchanger 3.The higher battery of temperature carries out heat exchange by balanced heat exchanger 3 with the lower battery of temperature, realizes electricity The temperature equalization in pond.
As shown in Figure 1 b, wherein in the first pipeline media flow direction are as follows: balanced the 3-the first battery thermal management of heat exchanger Module 41-battery thermal management of the 51-the first battery module 51-equilibrium heat exchanger 3, specifically: balanced heat exchanger 3-the one or three Port valve 61-media Containers, 503-flow sensor, 506-second temperature sensor the 41-the first temperature of the 505-the first battery passes 502-the 501-the second triple valve of heater 62-equilibrium heat exchanger 3 of sensor 504-pump；The flow direction of medium in second pipeline Are as follows: balanced 52-equilibrium of the 3-the second battery thermal management of heat exchanger module 42-battery thermal management of the 52-the second battery module heat exchange Device 3, specifically: the 502-the first temperature sensor of balanced 3-the four 64-heater of triple valve of heat exchanger, 501-pump 504- First battery 42-second temperature sensor, 505-flow sensor, 506-media Containers, 503-third triple valve 63-is Weigh heat exchanger 3.The flow direction of 1 circulation loop of Fig. 1 b battery and Fig. 1 a on the contrary, in heat exchanger 2 first pipe and second pipe medium The heat exchange efficiency of heat exchanger can be improved on the contrary, compared with Fig. 1 a in flow direction.
The system can be when the temperature difference between multiple batteries be larger, by heat exchanger to the temperature of multiple batteries as a result, Degree carries out, so as to improve the cycle life of battery.
Medium in=battery thermal management module flows into the inside of battery from the entrance of flow path, flows out from the outlet of flow path, To realize the heat exchange between battery and medium.Pump 502 is mainly used for providing power, and media Containers 503 are mainly used for storing Medium and the medium for receiving to add to humidity control system, when the medium in humidity control system is reduced, in media Containers 503 Medium can be automatically replenished.Temperature of first temperature sensor 504 to detect path inlet medium, second temperature sensor 505 temperature to detect flowing path outlet medium.Flow sensor 506 is to detect pipeline internal medium in humidity control system Flow rate information.
Further, according to one embodiment of present invention, the temperature that controller is also used to obtain battery adjusts practical function Rate P2 and temperature regulatory demand power P 1 adjust actual power P2 and temperature regulatory demand power with and according to the temperature of battery The refrigeration work consumption of compressor is adjusted in P1.
Specifically, as shown in Figure 1, on-board air conditioner includes that the cooling branch of battery and refrigeration branch, each battery are one corresponding Refrigeration branch, i.e. the first refrigeration branch 101 and the second refrigeration branch 102, each refrigeration branch include compressor and condenser 10, To provide refrigeration work consumption.Each heat exchanger includes two pipelines, first pipe with second pipe is mutually independent closes on setting, So that the medium (media such as the flow medias such as refrigerant, water, oil, air or phase-change material or other chemicals) in pipeline Independently of each other, first pipe is connected with compressor, and second pipe is connected with battery thermal management module, wherein flows in first pipe Be refrigerant, what is flowed in second pipe is medium.First Heat Exchanger 21 is corresponding with the cooling branch 201 of the first battery, the second heat exchange Device 22 is corresponding with the cooling branch 202 of the second battery, and the cooling branch of each battery includes electronic valve and expansion valve, on-board air conditioner Controller passes through the opening and closing of the cooling branch of each battery of open and close control of control electronic valve, by controlling the aperture of expansion valve to control The rate-of flow of the cooling branch of battery processed, to control the cooling power of the cooling branch of corresponding battery.
When the temperature of some battery is higher, such as higher than 40 DEG C, then the humidity control system of on-vehicle battery enters cooling Mode, compressor, battery thermal management module are started to work, the starting of battery refrigerating function, refrigerant and second pipe in first pipe The flow direction of middle medium is respectively as follows: compressor-condenser-electronic valve-expansion valve-heat exchanger-compressor；Heat exchange Device-battery thermal management module-battery-battery thermal management module-heat exchanger.Certainly, when the temperature of battery is lower, battery Heating function is opened, and heater is opened, while electronic valve being kept to close, and heater heats medium, to provide heating function Rate.
In an embodiment of the present invention, on-vehicle battery humidity control system can also include: the battery being electrically connected with the controller State detection module, battery status detection module are used to detect the electric current of on-vehicle battery.
During cooling down to battery, controller also obtains the temperature regulatory demand power P 1 and temperature of battery in real time Degree adjusts actual power P2, wherein the temperature of battery is adjusted to setting within the object time by temperature regulatory demand power P 1 Target temperature, battery need power, battery temperature adjust actual power P2 i.e. currently to battery carry out temperature adjusting when, electricity The actual power that pond obtains, target temperature and object time are setting value, can be carried out according to the actual conditions of on-vehicle battery pre- If for example, target temperature can be set at 35 DEG C or so, and the object time can be set as 1 hour when cooling down to battery. Controller can adjust actual power P2 to the refrigeration work consumption of compressor according to the temperature regulatory demand power P 1 and temperature of battery It is adjusted, so that battery can complete temperature adjusting within the object time, the temperature of on-vehicle battery is made to maintain preset range, Avoid that there is a situation where due to influence on-vehicle battery performance too high or too low for temperature.
Temperature adjusting actual power P2 and temperature tune that how controller obtains battery are described combined with specific embodiments below Save demand power P1.
According to one embodiment of present invention, controller can be used for obtaining the first ginseng when battery opening temperature is adjusted Number, and the first temperature regulatory demand power of battery is generated according to the first parameter, and obtain the of battery when temperature is adjusted Two parameters, and adjusted according to the second temperature regulatory demand power of the second parameter generation battery, and according to the first temperature of battery The temperature regulatory demand power P 1 of the second temperature regulatory demand power of demand power and battery generation battery.
Further, according to one embodiment of present invention, the first parameter is initial temperature when battery opening temperature is adjusted Degree and target temperature and the object time t for reaching target temperature from initial temperature, controller obtain initial temperature and target temperature The first temperature difference Δ T between degree1, and according to the first temperature difference Δ T1The first temperature regulatory demand function is generated with object time t Rate.
Further, controller generates the first temperature regulatory demand power by following formula (1):
ΔT1* (1) C*M/t,
Wherein, Δ T1The first temperature difference between initial temperature and target temperature, t are the object time, and C is the ratio of battery Thermal capacitance, M are the quality of battery.
Second parameter is the average current I of battery within a preset time, and controller generates the second temperature by following formula (2) Spend regulatory demand power:
I2* R, (2),
Wherein, I is average current, and R is the internal resistance of battery.
When being cooled down to battery, P1=Δ T1*C*M/t+I2*R。
According to one embodiment of present invention, the inlet temperature that controller is detected according to the first temperature sensor 504 respectively Second temperature difference Δ T is generated with the outlet temperature that second temperature sensor 505 detects2, and according to the second temperature of each battery Poor Δ T2Actual power P2 is adjusted with the flow velocity v that flow sensor 506 the detects temperature for generating battery.
Further, according to one embodiment of present invention, the practical function of temperature adjusting is generated according to by following formula (3) Rate P2:
ΔT2* c*m, (3)
Wherein, Δ T2Poor for second temperature, c is the specific heat capacity of medium in flow path, and m is the cross that flow path is flowed through in the unit time The mass of medium in section, wherein m=v*s*p, s are the cross-sectional area of flow path, and v is the flow velocity of medium, and ρ is the density of medium.
In addition, flow sensor can also be substituted by flow sensor, m=Q* ρ, when Q is the unit that flow sensor measures The interior rate-of flow for flowing through flow passage cross-sectional area.
Specifically, as shown in Fig. 2, as shown in Fig. 2, controller may include battery management controller, battery thermal management device, On-board air conditioner controller.Wherein, battery thermal management device can with the first temperature sensor 504, second temperature sensor 505 and Flow sensor 506 be electrically connected, with pump 502 carry out CAN communication, and according to the specific heat capacity of medium, the density of medium, flow path cross Sectional area obtains temperature and adjusts actual power P2 and control the revolving speed of pump 502.Battery thermal management device is according to the first temperature sensing The medium of inlet temperature and outlet temperature and flow sensor detection 506 that device 504, second temperature sensor 505 detect Flow velocity, can calculate each battery temperature adjust actual power P2.
Battery management controller can acquire the temperature of the electric current for flowing through battery, battery itself, and according to the target of battery The specific heat capacity C of temperature, object time t and battery, the mass M of battery, battery internal resistance R, obtain temperature regulatory demand power P1, and control on-board air conditioner controller start or stop work.
After vehicle powers on, battery management controller judges whether vehicle needs to carry out temperature adjusting, if any one is electric The temperature in pond is higher than 40 DEG C, then judges that battery needs temperature to adjust, and is sent by CAN communication to on-board air conditioner controller and opens temperature The information of regulatory function is spent, heat exchange information is sent after on-board air conditioner controller opening temperature regulatory function to battery thermal management Device, meanwhile, on-board air conditioner controller controls on-board air conditioner and opens refrigerating function, and control needs to carry out temperature regulating cell and corresponds to Expansion valve and electronic valve work, battery thermal management device control pump 502 with default revolving speed (such as slow-speed of revolution) start-up operation.
Meanwhile in cooling procedure, battery management controller obtains initial temperature (i.e. Current Temperatures), the target temperature of battery Degree and the object time t for reaching target temperature from initial temperature, wherein target temperature and object time t can be according to the actual situation It is preset, and calculates the first temperature regulatory demand power of battery according to formula (1).Battery management controller also obtains electricity The average current I of pond within a preset time, and according to the second temperature regulatory demand power of formula (2) calculating battery.Then, electric Pond Management Controller is adjusted according to the first temperature regulatory demand power and second temperature regulatory demand power calculation temperature of battery The temperature of battery (is adjusted to the demand power of target temperature) by demand power P1 within the object time.Also, battery thermal It manages device and obtains the first temperature sensor 504 and the detection temperature information of second temperature sensor 505, and obtain flow sensor 506 The flow rate information of detection adjusts actual power P2 according to the temperature that formula (3) calculates battery.Finally, on-board air conditioner controller According to the temperature regulatory demand power P 1 of battery, temperature adjusting actual power P2 control on-board air conditioner refrigeration work consumption and expansion valve Aperture, selectively, battery thermal management device adjust the revolving speed of pump 502.
Illustrate controller how according to the temperature of battery adjusting actual power P2 and temperature below with reference to specifically embodiment On-board air conditioner refrigeration work consumption is adjusted in regulatory demand power P 1.
According to one embodiment of present invention, controller also adjusts actual power P2 less than battery temperature item tune to temperature When saving demand power P1, increase the refrigeration work consumption of compressor.Controller, which is also used to adjust actual power P2 in temperature, is less than battery When temperature equalization demand power P1, the aperture of First Heat Exchanger 21 and the cooling branch of 22 place battery of the second heat exchanger.
That is, when being cooled down to battery, if the temperature of battery adjusts actual power P2 and is less than battery temperature Equalization requirement power P 1 then on-board air conditioner controller increases the refrigeration work consumption of compressor, while increasing the aperture of expansion valve, with Increase the aperture of the cooling branch of battery, so that increasing temperature adjusts actual power P2, so that battery can be complete within the object time It is adjusted at temperature.
According to one embodiment of present invention, controller First Heat Exchanger 21 is corresponding with the cooling branch 201 of the first battery, the Two heat exchangers 22 are corresponding with the cooling branch 202 of the second battery, and the cooling branch 201 of the first battery is connected with the first compressor 11, The cooling branch 202 of second battery is connected with the second compressor 12, and on-board air conditioner is also used to cool down to battery, and the first electricity When the temperature in pond 41 is greater than the temperature of the second battery 42, increases the aperture of the cooling branch 201 of the first battery and reduce by the second battery The aperture of cooling branch 202, and cooled down to battery, and be greater than the first battery 41 in the temperature of the second battery 42 When temperature, increases the aperture of the cooling branch 202 of the second battery and reduce the aperture of the cooling branch 201 of the first battery.
Specifically, if there is the temperature of a battery is higher than 40 DEG C, then battery thermal management system refrigerating function starts, battery Manager sends battery refrigerating function starting information to on-board air conditioner.Battery manager acquires current battery temperature and electric current ginseng Number, and according to the heat generation parameter of the average current estimation battery within a period of time, according to the current mean temperature of battery pack and electricity The temperature regulatory demand power P 1 of the average current estimation battery of difference and battery between the target temperature of pond, and battery Cooling requirement power is sent to on-board air conditioner.Battery manager sends the number for needing to carry out cooling battery simultaneously.
If battery manager detects the temperature of the first battery 41 lower than 35 DEG C, battery manager sends the first battery 41 cooling completion information.If battery manager detects the temperature of the second battery 42 lower than 35 DEG C, battery manager is sent The cooling of second battery 42 completes information.If detect 3 DEG C higher than the temperature of the second battery 42 of the temperature of the first battery 41 with On, then battery manager sends the cooling power message information for increasing by the first battery 41.If the temperature of the second battery 42 is than High 3 DEG C of temperature or more of one battery 41, then battery manager sends the battery cooling power message information for increasing by the second battery 42.
If battery manager detects that the temperature of 2 batteries is below 35 DEG C, battery is cooling to be completed, battery manager The cooling information of completing of battery is sent to on-board air conditioner.If the temperature of battery is still higher than after refrigerating function opens 1 hour 35 DEG C, then battery manager increases battery cooling power demand.
If there is the temperature of a battery is lower than 0 DEG C, then battery thermal management system heating function starts.Battery manager is adopted Collect current battery temperature and current parameters, and estimates the heat generation parameter of battery according to the average current within a period of time, according to The temperature of the average current estimation power battery of difference and battery between battery actual temperature and battery target temperature is adjusted Demand power P1, and temperature regulatory demand power P 1 is sent to battery thermal management device, so that battery thermal management device is according to temperature Regulatory demand power P 1 controls heater 501 and carries out heating work.
If battery manager detects that the temperature of the first battery 41 is higher than 10 DEG C, battery manager sends the first battery Information is completed in 41 heating.If battery manager detects that the temperature of the second battery 42 is higher than 10 DEG C, battery manager is sent Information is completed in the heating of second battery 42.If detecting low 3 DEG C of temperature or more of the temperature of the first battery 41 than the second battery 4, Then battery manager sends the battery heating power message information for increasing by the first battery 41.If detecting the second battery 42 Temperature is than low 3 DEG C of electro-temperature or more of the first battery 41, then battery manager sends the heating power report for increasing by the second battery 42 Literary information.
If battery manager detects that the temperature of 2 batteries is above 10 DEG C, battery heating is completed, battery manager It sends battery heating completion information and gives battery thermal management device.If still having the temperature of battery after heating function opens 2 hours 10 DEG C still are below, then battery thermal management device increases the heating power of heater.
If the temperature of battery is between 0 DEG C to 40 DEG C, and the temperature difference of the first battery 41 and the second battery 42 is more than 8 DEG C, then battery manager sends battery temperature equalization function starting information.Battery manager acquires the temperature between present battery Difference and target time for balance estimate battery pack required temperature equal power, send battery temperature equal power demand information, with Balanced heat exchanger 3 is set to carry out temperature equalization to battery according to battery temperature equal power demand information.
According to one embodiment of present invention, controller also adjusts actual power P2 and battery to obtain the temperature of battery Temperature equalization demand power P3, and according to the temperature of battery adjust actual power P2 and battery temperature equalization demand power P3 Pump is controlled.
The temperature adjusting actual power P2 and battery how controller obtains battery are described below with reference to specifically embodiment Temperature equalization demand power P3.
Temperature difference between multiple batteries is adjusted in preset range by equalization requirement power P 3 in the object time, such as When within 3 DEG C, heating power/cooling power for needing.When temperature adjusts actual power P2, that is, battery progress temperature equalization Obtained practical heating power/cooling power.Object time is preset value, such as can be 1h.
Equalization requirement power P 3 includes demand for heat power P 3a and cooling requirement power P 3b, the matter between two batteries When amount, internal resistance are identical with electric current, when cooling down to battery, controller can be according to formula:It is raw At equal cooling requirement power P 3b；When heating to battery, controller can be according to formula: Generate demand for heat power P 3a.Wherein, Δ T1For the temperature gap between two batteries, t is the object time, and C is the ratio of battery Thermal capacitance, M are the quality of battery, and I is the electric current of battery, and R is the internal resistance of battery.
When the quality of two batteries, electric current and unequal internal resistance, lower with 1 temperature of battery, 2 temperature of battery is higher, electricity Pond 1 needs to heat, battery 2 need it is cooling for, controller can according to the following formula (1) calculate demand for heat power P 3a and And cooling requirement power P 3b is calculated according to formula (2):
Wherein, Δ T1For the temperature gap between two batteries, t is the object time, and C is the specific heat capacity of battery, M1It is first The quality of battery, M2For the quality of the second battery, I1For the electric current of the first battery, I2For the quality of the second battery, R1For the first electricity Internal resistance, R2Temperature change for the internal resistance of the second battery, the first battery 41 isThe temperature of second battery 42 Variation are as follows:
The electric current heat production of battery is completely counterbalanced by the control method of above-mentioned formula, so equalized in entire battery temperature Cheng Zhong, the higher battery temperature of temperature will not rise, but balanced demand power is higher.
Following introduction another kind regulative mode, i.e., only consider to reduce the temperature difference between battery as early as possible, not guarantee that Whether the temperature of battery can rise.It is not very high that such case, which is suitable for battery temperature, and the temperature difference between battery is larger When, it is not necessary that the temperature for limiting battery does not increase.Specific calculation formula is as follows:
Assuming that first battery 41 needs to cool down, the second battery 42 when the temperature of the first battery 41 is higher than electric second battery 42 Need to heat, then heating power caused by the electric current between two batteries is different, which differs, is | I1 2R1-I2 2R2|, controller can root Demand for heat power P 3a, which is calculated, according to following formula (3) calculates cooling requirement power P 3b with and according to formula (4):
That is P3a=P3b
Wherein, Δ T1For the temperature gap between two batteries, t is the object time, and C is the specific heat capacity of battery, M1It is first The quality of battery, M2For the quality of the second battery, I1For the electric current of the first battery, I2For the quality of the second battery, R1For the first electricity Internal resistance, R2For the internal resistance of the second battery.
According to one embodiment of present invention, controller is also used to obtain the entrance temperature of the flow path for obtaining battery temperature Degree and outlet temperature, and obtain the flow velocity v that coolant liquid flows into flow path, and the battery temperature detected according to the first temperature sensor 13 Flow path inlet temperature and second temperature sensor 14 detect outlet temperature generate second temperature difference Δ T2, and according to every The second temperature difference Δ T of a battery2Actual power P2 is adjusted with the flow velocity v that flow sensor 15 the detects temperature for generating battery.
Further, according to one embodiment of present invention, controller generates temperature by following formula and adjusts practical function Rate P2:P2=Δ T2* c*m, wherein Δ T2Poor for second temperature, c is the specific heat capacity of coolant liquid in flow path, and m is in the unit time Flowing through the coolant liquid quality of the cross-sectional area of flow path, wherein m=v* ρ * s, v are the flow velocity of coolant liquid, and ρ is the density of coolant liquid, S is the cross-sectional area of flow path.
In battery temperature equalization function start-up course, if battery manager, which detects, meets the starting of battery heating function Condition, then battery manager exits temperature equalization function, into battery heating function.If battery manager detects satisfaction electricity Pond refrigerating function entry condition, then battery manager exits temperature equalization function, into battery refrigerating function.If the first battery 41 and 42 battery mean temperature of the second battery difference less than 3 DEG C, then battery manager send battery temperature equalization function complete letter Breath.
On-board air conditioner obtain it is electric after, if on-board air conditioner controller receive battery manager transmission battery refrigerating function starting Information, then battery refrigerating function starts, and on-board air conditioner controller sends battery refrigerating function starting information and gives battery thermal management device. On-board air conditioner controller receives the temperature regulatory demand power P 1 for the battery that battery manager is sent, and the information is transmitted to electricity Pond thermal manager.In battery cooling procedure, on-board air conditioner controller controls the first electronic valve 213 and the first expansion valve 212 is opened It opens.On-board air conditioner controller receives the water temperature information that battery thermal management device is sent and the temperature of battery adjusts actual power P2, and The information is transmitted to battery manager.In battery cooling procedure, the temperature of on-board air conditioner controller control cell is adjusted and is needed Power P 1 and temperature is asked to adjust actual power P2, if the temperature of battery adjusts actual power P2 and is less than temperature regulatory demand power P1, then on-board air conditioner controller controls the increase refrigeration work consumption of compressor.If battery manager detects the first battery 41 Temperature is than high 3 DEG C of temperature or more of the second battery 42, then battery manager sends the cooling power message for increasing by the first battery 41 Information is to on-board air conditioner controller, then on-board air conditioner controller increases according to the cooling power message information for increasing by the first battery 41 The aperture of first expansion valve 212 of the cooling branch 201 of the first battery and the first expansion valve for reducing the cooling branch 202 of the second battery 212 aperture, so that the cooling power of the first battery 41 increases, the cooling power of the second battery 42 is reduced, to reduce battery Between battery temperature difference.If the temperature of the second battery 42 is than high 3 DEG C of temperature or more of the first battery 41, battery management Device sends the battery cooling power message information for increasing by the second battery 42, and on-board air conditioner controller is according to the second battery 42 of increase Battery cooling power message information increases the aperture second of the first expansion valve 212 of the cooling branch 202 of the second battery and reduces big The aperture of first expansion valve 212 of the cooling branch 201 of the first battery, so that the cooling power of the first battery 41 reduces, the second electricity The cooling power in pond 42 increases, to reduce the battery temperature difference between battery.
In battery cooling procedure, if the first battery 41 that on-board air conditioner controller receives battery manager transmission is cold But information is completed, then the first electronic valve 213 for controlling the cooling branch 201 of the first battery is closed.If on-board air conditioner controller connects The cooling completion information of the second battery for receiving battery manager transmission, then control the first electronics of the cooling branch 202 of the second battery Valve 213 is closed.If on-board air conditioner controller receives the cooling completion information of battery of battery manager transmission, electricity is forwarded The cooling information of completing in pond gives battery thermal management device, and battery is cooling to be completed.
It is appreciated that the channel 2 that controller controls triple valve is opened, and channel 1 is closed, in temperature in refrigerating function starting When spending equalization function unlatching, the channel 2 that controller controls triple valve is closed, and channel 1 is opened.
According to one embodiment of present invention, as shown in figure 3, the humidity control system of on-vehicle battery can also include above-mentioned System can also to include that be connected respectively with multiple compressors multiple are interior cool down branches.The cooling branch of car includes the first vehicle Interior cooling branch 301 and the second interior cooling branch 302, the first car cool back branch 301 and 11 phase of the first compressor Even, the described second interior cooling branch is connected with the second compressor 12.
Controller is also used to when the temperature of battery reaches third preset temperature, reduces by the first interior cooling 301 He of branch The aperture of second interior cooling branch 302, while increasing the cooling branch 201 of the first battery and the cooling branch 202 of the second battery Aperture, and when the temperature of battery reaches third preset temperature, further judge whether temperature reaches air-conditioning setting in compartment Temperature, wherein if reaching air-conditioning set temperature, reduce the first interior cooling branch 301 and the second interior cooling branch 302 Aperture, while increasing the aperture of the cooling branch 201 of the first battery and the cooling branch 202 of the second battery.Wherein, the default temperature of third Degree temperature can be preset according to the actual situation, such as can be 45 DEG C.
Further, as shown in figure 4, the first interior cooling branch 301 corresponds to the first air outlet 100 and second in compartment Air outlet 200, the second interior cooling branch 302 correspond to third air outlet 300 and the 4th air outlet 400 in compartment, controller It is also used to: being greater than third air outlet 300 and the 4th air outlet 400 in the temperature of the first air outlet 100 and the second air outlet 200 When temperature, increase the aperture of the first interior cooling branch 301 and reduce the aperture of the second interior cooling branch 302, and the When the temperature of one air outlet 100 and the second air outlet 200 is less than the temperature of third air outlet 300 and the 4th air outlet 400, increase The aperture of second interior cooling branch 302 and the aperture for reducing the first interior cooling branch 301.
Specifically, as shown in figure 3, each interior cooling branch includes: the evaporator 31 being serially connected, the second electronic valve 32 With the second expansion valve 33, the cooling branch of car is connected with corresponding refrigeration branch.Wherein, the second electronic valve 32 is corresponding to control Interior refrigeration branch opening and closing, aperture of second expansion valve 33 to control corresponding interior cooling branch.When compartment domestic demand When freezing, on-board air conditioner controls the second electronic valve 32 and opens.
On-board air conditioner controller obtain it is electric after, if receive battery manager transmission battery refrigerating function starting information, The starting of battery refrigerating function, on-board air conditioner controller send battery refrigerating function starting information and give battery thermal management device.Vehicle-mounted sky It adjusts and receives the battery cooling power demand information (temperature regulatory demand power P 1) that battery manager is sent, and the information is forwarded Give battery thermal management device.In battery cooling procedure, on-board air conditioner controller receives the water temperature information that battery thermal management device is sent With the practical cooling power information of power battery pack (temperature adjust actual power P2), and the information is transmitted to battery manager. In battery cooling procedure, on-board air conditioner controller control cell cooling requirement power and the practical cooling power information of battery, such as The temperature of fruit battery adjusts the temperature regulatory demand power P 1 that actual power P2 is less than battery, then judges whether the temperature of battery reaches To 45 DEG C (higher temperature), if there is the temperature of battery reaches 45 DEG C, then on-board air conditioner controller reduces by the second expansion valve 33 Aperture increases the aperture of the first expansion valve 212, to reduce the cold medium flux of interior cooling branch, increases the cooling branch of battery Cold medium flux, to adjust the cooling and interior cooling refrigerating capacity distribution of battery.Also, on-board air conditioner controller compares first in real time The temperature of the cooling branch 202 of the cooling branch 201 in pond and the second pond adjusts actual power, if the temperature tune of the two cooling branches Temperature regulatory demand power P 1 the sum of of the sum of the actual power P2 less than two batteries is saved, then reduces opening for the second expansion valve 33 Degree increases the aperture of the first expansion valve 212, if the temperature of two cooling duplexures adjusts the sum of actual power P2 and is greater than Equal to the sum of the temperature regulatory demand power P 1 of two batteries, then the aperture of the first expansion valve 212 is reduced, or keeps current swollen Swollen valve opening is constant.
If the temperature of all batteries is no greater than 45 DEG C, on-board air conditioner controller judges whether the temperature in compartment reaches To air-conditioning set temperature, if reached, on-board air conditioner controller reduces the aperture of the second expansion valve 33, increases swollen first expansion The aperture of valve 212 adjusts the cold medium flux of interior cooling branch and the cooling branch of battery.If the temperature in compartment does not reach It is to air-conditioning set temperature, then preferential to meet interior refrigeration capacity requirement.In battery cooling procedure, if on-board air conditioner controller The cooling completion information of battery for receiving battery manager transmission then forwards the cooling information of completing of battery to give battery thermal management device, Battery is cooling to be completed.
Battery mean temperature has been done herein and has been handled by different level, temperature controlled threshold value is respectively 40 DEG C, 45 DEG C and 35 DEG C. When the temperature of any one battery is higher than 40 DEG C, the starting of battery refrigerating function, when the temperature of all batteries reaches 35 DEG C, then battery Cooling to complete, when the temperature of any one battery reaches 45 DEG C of higher temperatures, on-board air conditioner preferentially meets the cooling refrigeration of battery Amount demand.In addition, when the temperature of battery adjusts the sum of actual power and is less than the sum of the temperature regulatory demand power of battery, if Battery mean temperature is no more than 45 DEG C, then the refrigeration capacity requirement in still preferential compartment, if the cooling power in compartment is Abundance, and reach balance, then on-board air conditioner increases battery cooling power again.
In battery refrigerating function start-up course, if needing to open air-conditioning inside railway carriage, need to the ring in compartment Border temperature is monitored and controls, so that interior environment temperature everywhere is kept in balance, while battery is cooling to be wanted by being able to satisfy It asks.As shown in Fig. 2, when on-board air conditioner controller detects near zone temperature at the first air outlet 100 and the second air outlet 200 When than high 3 DEG C of near zone temperature or more at third air outlet 300 and the 4th air outlet 400, on-board air conditioner controller control the 212 aperture of the first expansion valve in the cooling branch 201 of one battery is reduced, the second expansion valve in the first interior cooling branch 301 33 apertures increase, so that the cooling power of the first interior cooling branch 301 increases, the interior cooling branch of on-board air conditioner control second 33 aperture of the second expansion valve in 302 is reduced, and 212 aperture of the first expansion valve in the cooling branch 202 of the second battery increases, so that The cooling power of second interior cooling branch 302 is reduced, and the overall cooling power for keeping the cooling branch of battery is constant, while making again Obtaining compartment, air outlet near zone temperature is balanced everywhere.
When on-board air conditioner controller detects that near zone temperature ratio goes out at third air outlet 300 and the 4th air outlet 400 When high 3 DEG C of near zone temperature or more at the first air outlet 100 and the second air outlet 200, on-board air conditioner controller control second The aperture of the first expansion valve swollen 212 is reduced in the cooling branch 202 of battery, the second expansion valve 33 in the second interior cooling branch 302 Aperture increase so that the second interior cooling 302 cooling power of branch increases, also, on-board air conditioner controller controls the first vehicle The aperture of the second expansion valve 33 in interior cooling branch 301 is reduced, the first expansion valve 212 in the cooling branch 201 of the first battery Aperture increase so that the first interior cooling 301 cooling power of branch is reduced.When on-board air conditioner controller detects the first outlet air Mouthfuls 100 and the second near zone gas near zone temperature at air outlet 200 and third air outlet 300 and the 4th air outlet 400 The temperature difference it is different within 3 DEG C when, then keep the second expansion in the first interior cooling branch 301 and the second interior cooling branch 302 The aperture of valve 33 is constant.
In addition, as shown in figure 5, the embodiment of the present invention also proposes a kind of humidity control system of on-vehicle battery.Fig. 1 a-1b It is with the main distinction of Fig. 7, heat exchange blower fan (the first blower and the second blower i.e. in figure), Fig. 1 a-1b is increased in Fig. 5 In scheme, need to access simultaneously in the circulation loop of wherein one end of balanced heat exchanger between two batteries, just may be implemented Temperature equalization, i.e., must the heating of battery, another battery is cooling while carrying out, Fig. 1 a-1b can fast implement battery it Between temperature equalization.
And scheme shown in Fig. 5, then it only can be linked into temperature equalization circuit by controlling one of battery, the other end is logical It crosses blower and external environment progress heat exchange can be individually by the first battery 41 that is, if the temperature of the first battery 41 is higher The first pipe for accessing balanced heat exchanger, without electric second battery 42 is linked into second pipe, Fig. 5 can make battery more It is fast to complete cooling.) for example, first battery thermal management module is opened when 41 temperature of the first battery is higher than the temperature of the second battery 42 Beginning work, 502 starting of control pump, while controlling the first blower and starting to work, so that medium in balanced heat exchanger first pipe Heat is blowed in external environment by heat exchange blower fan, so that medium temperature declines, so that cooling power is provided for battery, so that the The decline of one battery, 41 temperature, and then reduce the temperature difference between the first battery 41 and the second battery 42.When 42 temperature of the second battery When spending higher than 41 temperature of the first battery, the second battery thermal management module is started to work, 502 starting of control pump, while controlling second Blower is started to work, so that the heat of medium is blowed in external environment by heat exchange blower fan in balanced heat exchanger second pipe, is made Medium temperature decline is obtained, to provide cooling power for battery, so that 41 temperature of the first battery declines, and then reduces by the first battery Temperature difference between 41 mild second batteries 42.
The humidity control system of on-vehicle battery according to an embodiment of the present invention by obtaining the temperature of multiple batteries, and is sentenced Whether the temperature difference broken between multiple batteries is greater than preset temperature threshold, so that temperature of the balanced heat exchanger between multiple batteries When difference is greater than preset temperature threshold, the temperature of multiple batteries is carried out balanced.As a result, the service system can multiple batteries it Between temperature difference it is larger when, the temperature of multiple batteries is carried out, so as to improve the circulation of battery by balanced heat exchanger Service life.Also, actual power can also be adjusted according to the temperature regulatory demand power and temperature of each battery and temperature is carried out to battery Degree is adjusted, so as to when on-vehicle battery is too high or too low for temperature, according to the actual state of on-vehicle battery to battery temperature into Row is adjusted, and the temperature of on-vehicle battery is made to maintain preset range, avoids occurring due to influence on-vehicle battery too high or too low for temperature The case where performance.
Fig. 6 is the flow chart of the temperature control method of the on-vehicle battery of an embodiment according to the present invention.Wherein, as schemed Shown in 1, on-vehicle battery humidity control system includes the multiple battery thermal management moulds being respectively connected with the heat exchange flow path of multiple batteries Block, the multiple heat exchangers being connected respectively with multiple battery thermal management modules, the multiple compressors being connected respectively with multiple heat exchangers, The balanced heat exchanger connected and in parallel with multiple heat exchangers with multiple battery thermal management modules, wherein multiple battery thermals Manage a part in module and the first pipeline in balanced heat exchanger be connected, another part in multiple battery thermal management modules and The second pipeline in balanced heat exchanger is connected.As shown in fig. 6, temperature control method the following steps are included:
S1 obtains the temperature of multiple batteries.
S2, judges whether the temperature difference between multiple batteries is greater than preset temperature threshold.Wherein, preset temperature threshold can be with It is preset according to the actual situation, for example, can be 8 DEG C.
S3 is carried out equal if temperature difference is greater than preset temperature threshold by temperature of the balanced heat exchanger to multiple batteries Weighing apparatus.
Further, in an embodiment of the present invention, as shown in Fig. 1 a-1b, battery includes the first battery and the second battery, Battery thermal management module includes the first battery thermal management module and the second battery thermal management module, and compressor includes the first compressor With the second compressor, heat exchanger includes First Heat Exchanger and the second heat exchanger, and the first end of the first battery thermal management module passes through First triple valve is connected with the first end of the first pipeline in the first end of First Heat Exchanger and balanced heat exchanger respectively, the first battery The second end of thermal management module is managed in the second end of First Heat Exchanger and balanced heat exchanger first respectively by the second triple valve The second end on road is connected, and the first end of the second battery thermal management module passes through first of third triple valve respectively with the second heat exchanger It holds and is connected with the first end of the second pipeline in balanced heat exchanger, the second end of the second battery thermal management module passes through the 4th triple valve It is connected respectively with the second end of the second pipeline in the second end of the second heat exchanger and balanced heat exchanger, wherein exchanged heat by equilibrium It includes: by control triple valve to pass through balanced heat exchanger to the temperature of multiple batteries that device, which carries out equilibrium to the temperature of multiple batteries, It carries out balanced.
Specifically, battery, which refers to, is installed on vehicle, and provides power output for vehicle and is that other electricity consumptions on vehicle are set It is standby that the energy storage device of electricity is provided, it can be repeatedly charged.Battery can be battery pack or battery modules.
As shown in Fig. 1 a-1b, balanced heat exchanger can be plate heat exchanger, and two pipelines in balanced heat exchanger are mutually only It is vertical to close on setting.When there are when the larger temperature difference, such as the temperature difference is more than 8 DEG C between two batteries, electric battery temperature equalization function is opened Dynamic control battery thermal management module starts work, and the channel 1 for controlling first to fourth threeway is connected, and channel 2 is closed, so that the Media flow in one pipeline and the second pipeline, wherein in the first pipeline media flow direction are as follows: balanced heat exchanger-first Battery thermal management module-the first battery-battery thermal management module-equilibrium heat exchanger；The flow direction of medium in second pipeline Are as follows: balanced the second battery thermal management of heat exchanger-module-the first battery-battery thermal management module-equilibrium heat exchanger.Temperature Higher battery carries out heat exchange by balanced heat exchanger with the lower battery of temperature, realizes the temperature equalization of battery.As a result, may be used When larger with the temperature difference between multiple batteries, carried out by temperature of the heat exchanger to multiple batteries, so as to improve The cycle life of battery.
Further, according to one embodiment of present invention, as shown in Fig. 1 a-1b, above-mentioned temperature control method may be used also To include: the temperature adjusting actual power for obtaining battery；Obtain the temperature regulatory demand power of battery；It is adjusted according to temperature practical Power and temperature regulatory demand power control the refrigeration work consumption of compressor.
Specifically, when the temperature of battery is adjusted to target temperature by temperature regulatory demand power P 1, the temperature of battery needs Spend regulation power.It is the battery practical temperature obtained when currently carrying out temperature adjusting to battery that battery temperature, which adjusts actual power P2, Spend regulation power.Target temperature is setting value, can be preset according to the actual conditions of on-vehicle battery, for example, when being summer When, battery need to be cooled down, target temperature can be set at 35 DEG C or so.
The temperature of actual power P2 and battery are adjusted below with reference to the temperature how description of specifically embodiment obtains battery Demand power P1.
In the present invention, the temperature regulatory demand power P 1 for obtaining battery can specifically include: obtain battery opening temperature The first parameter when adjusting, and the first temperature regulatory demand power is generated according to the first parameter.Battery is obtained when temperature is adjusted The second parameter, and according to the second parameter generate second temperature regulatory demand power.According to the first temperature regulatory demand power and Second temperature regulatory demand power generates temperature regulatory demand power P 1.
Further, according to one embodiment of present invention, the first parameter is initial when battery opening temperature is adjusted Temperature and target temperature and the object time t for reaching the target temperature from initial temperature generate first according to the first parameter Temperature regulatory demand power specifically includes: obtaining the first temperature difference Δ T between initial temperature and target temperature1.According to first Temperature difference Δ T1The first temperature regulatory demand power P 1 is generated with object time t.
Further, according to one embodiment of present invention, the first temperature regulatory demand is generated by following formula (1) Power:
ΔT1* C*M/t, (1)
Wherein, Δ T1The first temperature difference between initial temperature and target temperature, t are the object time, and C is the ratio of battery Thermal capacitance, M are the quality of battery.
According to one embodiment of present invention, the second parameter is the average current I of battery within a preset time, by following Formula (2) generates second temperature regulatory demand power:
I2* R, (2)
Wherein, I is average current, and R is the internal resistance of battery.
When being cooled down to battery, P1=Δ T1*C*M/t+I2*R。
According to one embodiment of present invention, the temperature for obtaining battery, which adjusts actual power P2, can specifically include: obtain The inlet temperature and outlet temperature of flow path for regulating cell temperature, and obtain the flow velocity v that medium flow field enters flow path.According to entrance Temperature and outlet temperature generate second temperature difference Δ T2.According to second temperature difference Δ T2Temperature, which is generated, with flow velocity v adjusts actual power P2。
Further, according to one embodiment of present invention, into practical according to temperature adjusting is generated by following formula (3) Power P 2:
ΔT2* C*m, (3)
Wherein, Δ T2Poor for second temperature, C is the specific heat capacity of battery, and m is the cross section that flow path is flowed through in the unit time Mass of medium, wherein m=v* ρ * s, v are the flow velocity of medium, and ρ is the density of medium, and s is the cross-sectional area of flow path.
In addition, flow sensor can also be substituted by flow sensor, m=Q* ρ, when Q is the unit that flow sensor measures The interior rate-of flow for flowing through flow passage cross-sectional area.
According to one embodiment of present invention, as shown in fig. 7, the temperature control method of on-vehicle battery can also include:
S10 obtains the temperature of two batteries.
S20, the temperature for judging whether there is some battery are greater than the first temperature threshold.
S30 enters refrigerating mode if the temperature of any one battery is greater than the first temperature threshold.
S40, if the temperature of all batteries further determines whether that there are certain both less than or equal to the first preset threshold The temperature of a battery is less than second temperature threshold value.
S50 enters heating mode if the temperature of any one battery is less than second temperature threshold value.Wherein the first temperature Threshold value is greater than second temperature threshold value, for example, the first temperature threshold can be 40 DEG C, second temperature threshold value can be 0 DEG C.
S60, if the temperature of all batteries is both greater than or equal to second temperature threshold value and less than or equal to the first temperature threshold Value, then judge whether the temperature difference between two batteries is greater than preset temperature threshold.
S70 enters temperature equalization mode if the temperature difference between two batteries is greater than preset temperature threshold.
Below with reference to the description of specifically embodiment how according to temperature adjusting actual power P2 and temperature regulatory demand power P1 controls the refrigeration work consumption of compressor.
According to one embodiment of present invention, if temperature adjusts actual power P2 and is less than battery temperature equalization requirement power P1 then increases the refrigeration work consumption of on-board air conditioner.If temperature, which adjusts actual power P2, is less than battery temperature equalization requirement power P 1, The aperture of the first expansion valve 212 can also be increased.
That is, when being cooled down to battery, if the temperature of battery adjusts actual power P2 and is less than battery temperature Equalization requirement power P 1 then increasing the refrigeration work consumption of compressor, while increasing battery where First Heat Exchanger and the second heat exchanger The aperture of cooling circuit.
That is, when being cooled down to battery, if the temperature of some battery adjusts actual power P2 and is less than temperature Regulatory demand power P 1 then can increase the refrigeration work consumption of compressor, while increasing the aperture of expansion valve, cold to increase battery But the aperture of branch, so that increasing temperature adjusts actual power P2, so that battery can complete temperature adjusting within the object time.
According to one embodiment of present invention, as shown in Fig. 1 a-1b, First Heat Exchanger and the cooling branch pair of the first battery It answers, the second heat exchanger is corresponding with the cooling branch of the second battery, and the cooling branch of the first battery is connected with the first compressor, the second electricity The cooling branch in pond is connected with the second compressor, the method also includes: it is cooled down when to battery, and the temperature of the first battery is big When the temperature of the second battery, increases the aperture of the cooling branch of the first battery and reduce the aperture of the cooling branch of the second battery；When Battery is cooled down, and when the temperature of the second battery is greater than the temperature of the first battery, issues additional the cooling branch of big second battery Aperture and the aperture for reducing the cooling branch of the first battery.
Specifically, if there is the temperature of a battery is higher than 40 DEG C, then battery thermal management system refrigerating function starts, acquisition Current battery temperature and current parameters, and according to the heat generation parameter of the average current estimation battery within a period of time, according to electricity The temperature of the average current estimation battery of difference and battery between the current mean temperature of pond group and battery target temperature is adjusted Demand power P1.
If detecting the temperature of the first battery lower than 35 DEG C, the first battery is cooling to be completed.If detecting the second electricity The temperature in pond is lower than 35 DEG C, and the cooling of the second battery is completed.If detecting temperature of the temperature than the second battery of the first battery High 3 DEG C or more, then increase the cooling power message of the first battery.If the temperature of the second battery is higher than the temperature of the first battery by 3 DEG C or more, then increase the cooling function of battery of the second battery.
If detecting that the temperature of a battery is below 35 DEG C, battery is cooling to be completed.If refrigerating function is opened 1 small When after, the temperature of battery is still higher than 35 DEG C, then increases battery cooling power.
If there is the temperature of a battery is lower than 0 DEG C, then battery thermal management system heating function starts.Acquire present battery Temperature and current parameters, and according to the heat generation parameter of the average current estimation battery within a period of time, according to the practical temperature of battery The temperature regulatory demand power of the average current estimation power battery of difference and battery between degree and battery target temperature P1, and heater is controlled according to temperature regulatory demand power P 1 and carries out heating work.
If detecting that the temperature of the first battery is higher than 10 DEG C, the heating of the first battery is completed.If detecting the second electricity The temperature in pond is higher than 10 DEG C, then the second battery heating is completed.If detecting temperature of the temperature than the second battery of the first battery Low 3 DEG C or more, then increase the battery heating power of the first battery.If detecting electricity of the temperature than the first battery of the second battery Low 3 DEG C of temperature or more, then increase the heating power breath of the second battery.
If detecting that the temperature of a battery is above 10 DEG C, battery heating is completed.If heating function is opened 2 small When after, still there is the temperature of battery still to be below 10 DEG C, then increase the heating power of heater.
If the temperature of battery is between 0 DEG C to 40 DEG C, and the temperature difference of the first battery and the second electricity 2 is more than 8 DEG C, then The starting of battery temperature equalization function.In battery temperature equalization function start-up course, meet battery heating function if detected Entry condition then exits temperature equalization function, into battery heating function.Meet battery refrigerating function trip bar if detected Part then exits temperature equalization function, into battery refrigerating function.If the first battery and the second battery mean temperature difference Less than 3 DEG C, then battery temperature equalization function is completed.
In battery cooling procedure, controls the first electronic valve and the first expansion valve is opened, and the temperature of control cell is adjusted Demand power P1 and temperature adjust actual power P2, if the temperature of the battery of some battery adjusts actual power P2 and is less than temperature Regulatory demand power P 1 then controls increase refrigeration work consumption.If detecting that the temperature of the first battery is higher than the temperature of the second battery by 3 DEG C or more, then increase the aperture for increasing the first expansion valve of the cooling branch of the first battery and reduces the of the cooling branch of the second battery The aperture of one expansion valve, so that the cooling power of the first battery increases, the cooling power of the second battery is reduced, to reduce battery Between battery temperature difference.If 3 DEG C higher than the temperature of the first battery of the temperature of the second battery or more, it is cold to increase the second battery But the aperture second of the first expansion valve of branch and reduce the cooling branch of big first battery the first expansion valve aperture so that the The cooling power of one battery reduces, and the cooling power of the second battery increases, to reduce the battery temperature difference between battery.
It in battery cooling procedure, is completed if the first battery is cooling, controls the first electricity of the cooling branch of the first battery Sub- valve is closed.It is completed if the second battery is cooling, the first electronic valve for controlling the cooling branch of the second battery is closed.
According to one embodiment of present invention, as shown in figure 3, the humidity control system of on-vehicle battery further include: interior cold But branch, interior cooling circuit include the first interior cooling circuit and the second interior cooling circuit, and the above method can also include: Judge whether the temperature of battery reaches third preset temperature；If reaching third preset temperature, reduces by the first car and cool back The aperture on road and the second interior cooling circuit, while increasing the aperture of the first battery cooling circuit and the second battery cooling circuit； If not up to third preset temperature, further judge whether temperature reaches air-conditioning set temperature in compartment；If reaching empty Set temperature is adjusted, then reduces the aperture of the first interior cooling circuit and the second interior cooling circuit, while it is cold to increase by the first battery But the aperture in circuit and the second battery cooling circuit.
Further, as shown in figure 3, the first interior cooling circuit corresponds to the first air outlet and the second outlet air in compartment Mouthful, the second interior cooling circuit corresponds to third air outlet and the 4th air outlet in compartment, and upper method can also include: when first When the temperature of air outlet and the second air outlet is greater than the temperature of third air outlet and the 4th air outlet, increases by the first car and cool back The aperture on road and the aperture for reducing the second interior cooling circuit；When the temperature of the first air outlet and the second air outlet goes out less than third When the temperature of air port and the 4th air outlet, increases the aperture of the second interior cooling circuit and reduce opening for the first interior cooling circuit Degree.
Specifically, as shown in figure 3, each interior cooling branch includes: the evaporator being serially connected, the second electronic valve and the Two expansion valves, the cooling branch of car are connected with corresponding refrigeration branch.Wherein, the second electronic valve is to control corresponding interior system The opening and closing of cold branch, aperture of second expansion valve to control corresponding interior cooling branch.When needing to freeze in compartment, vehicle The second electronic valve of airconditioning control is carried to open.
In battery cooling procedure, control cell cooling requirement power and the practical cooling power information of battery, if battery Temperature adjust actual power P2 be less than battery temperature regulatory demand power P 1, then judge whether the temperature of battery reaches 45 DEG C (higher temperature) then reduces the aperture of the second expansion valve if there is the temperature of battery reaches 45 DEG C, increases opening for the first expansion valve Degree increases the cold medium flux of the cooling branch of battery with the cold medium flux of the interior cooling branch of reduction, to adjust battery cooling and vehicle The refrigerating capacity of interior cooling is distributed.Also, the temperature of the cooling branch of the cooling branch in relatively the first pond and the second pond is adjusted practical in real time Power, if the temperature of the two cooling branches adjusts temperature regulatory demand power of the sum of the actual power P2 less than two batteries The sum of P1 then reduces the aperture of the second expansion valve, increases the aperture of the first expansion valve, if the temperature of two cooling duplexures The sum of the temperature regulatory demand power P 1 that the sum of actual power P2 is more than or equal to two batteries is adjusted, then reduces by the first expansion valve 212 aperture, or keep current expansion valve opening constant.
If the temperature of all batteries is no greater than 45 DEG C, judge whether the temperature in compartment reaches air-conditioning setting temperature Degree reduces the aperture of the second expansion valve if reached, and increases the aperture of swollen first expansion valve, adjust interior cooling branch and The cold medium flux of the cooling branch of battery.If the temperature in compartment does not reach air-conditioning set temperature, preferential satisfaction car Refrigeration capacity requirement.
Battery mean temperature has been done herein and has been handled by different level, temperature controlled threshold value is respectively 40 DEG C, 45 DEG C and 35 DEG C. When the temperature of any one battery is higher than 40 DEG C, the starting of battery refrigerating function, when the temperature of all batteries reaches 35 DEG C, then battery Cooling to complete, when the temperature of any one battery reaches 45 DEG C of higher temperatures, on-board air conditioner preferentially meets the cooling refrigeration of battery Amount demand.In addition, when the temperature of battery adjusts the sum of actual power and is less than the sum of the temperature regulatory demand power of battery, if Battery mean temperature is no more than 45 DEG C, then the refrigeration capacity requirement in still preferential compartment, if the cooling power in compartment is Abundance, and reach balance, then on-board air conditioner increases battery cooling power again.
In battery refrigerating function start-up course, if needing to open air-conditioning inside railway carriage, need to the ring in compartment Border temperature is monitored and controls, so that interior environment temperature everywhere is kept in balance, while battery is cooling to be wanted by being able to satisfy It asks.As shown in Fig. 2, when detecting that near zone temperature goes out than third air outlet and the 4th at the first air outlet and the second air outlet At air port at high 3 DEG C of near zone temperature or more, the aperture of the cooling branch of the first battery of control is reduced, the first interior cooling branch In aperture increase so that the cooling power of the first interior cooling branch increases, the aperture in the interior cooling branch of control second It reducing, the aperture of the cooling branch of the second battery increases, so that the cooling power of the second interior cooling branch is reduced, it is overall to keep electricity The cooling power of the cooling branch in pond is constant, while making compartment air outlet near zone temperature equilibrium everywhere again.
When detecting at third air outlet and the 4th air outlet near zone temperature than going out the first air outlet and the second outlet air When high 3 DEG C of near zone temperature or more at mouthful, the aperture of the cooling branch of the second battery of control is reduced, the second interior cooling branch Aperture increases, so that the second interior cooling 302 cooling power of branch increases, also, controls the aperture of the first interior cooling branch It reduces, the aperture of the cooling branch of the first battery increases, so that the cooling power of the first interior cooling branch is reduced.When detecting Near zone temperature difference near zone temperature and third air outlet and the 4th air outlet at one air outlet and the second air outlet When within 3 DEG C, the aperture of the cooling branch of the first battery of control and the cooling branch of the second battery is identical, the first interior cooling branch It is identical with the second interior cooling aperture of branch, to guarantee the first interior cooling branch and the second interior cooling branch in compartment Cooling power it is identical.
In conclusion the temperature control method of on-vehicle battery according to an embodiment of the present invention, obtains multiple electricity first The temperature in pond, then judges whether the temperature difference between multiple batteries is greater than preset temperature threshold, if it is greater than preset temperature threshold Value is then carried out by temperature of the balanced heat exchanger to multiple batteries balanced.This method can be in the temperature between multiple batteries as a result, When degree difference is larger, carried out by temperature of the balanced heat exchanger to multiple batteries, so as to improve the cycle life of battery.And And actual power can also be adjusted according to the temperature regulatory demand power and temperature of each battery and temperature adjusting is carried out to battery, So as to battery temperature is adjusted according to the actual state of on-vehicle battery when on-vehicle battery is too high or too low for temperature, So that the temperature of on-vehicle battery is maintained preset range, avoids occurring due to the feelings too high or too low for temperature for influencing on-vehicle battery performance Condition.
In addition, the embodiment of the present invention also proposes a kind of non-transitorycomputer readable storage medium, it is stored thereon with meter Calculation machine program, the program realize above-mentioned temperature control method when being executed by processor.
The non-transitorycomputer readable storage medium of the embodiment of the present invention obtains the temperature of multiple batteries, then first Judge whether the temperature difference between multiple batteries is greater than preset temperature threshold, if it is greater than preset temperature threshold, then passes through equilibrium Heat exchanger carries out equilibrium to the temperature of multiple batteries, when larger so as to the temperature difference between multiple batteries, passes through equilibrium Heat exchanger carries out, so as to improve the cycle life of battery the temperature of multiple batteries.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (18)

1. a kind of humidity control system of on-vehicle battery characterized by comprising
The multiple battery thermal management modules being respectively connected with the heat exchange flow path of multiple batteries；
The multiple heat exchangers being connected respectively with the multiple battery thermal management module；
The multiple compressors being connected respectively with the multiple heat exchanger；
The balanced heat exchanger connected and in parallel with the multiple heat exchanger with the multiple battery thermal management module, wherein A part in the multiple battery thermal management module is connected with the first pipeline in the balanced heat exchanger, the multiple battery Another part in thermal management module is connected with the second pipeline in the balanced heat exchanger；
Controller, the controller are connect with the battery thermal management module, and the controller is for obtaining the multiple battery Temperature, and judge whether the temperature difference between the multiple battery is greater than preset temperature threshold, between the multiple battery Temperature difference when being greater than preset temperature threshold, carried out by temperature of the balanced heat exchanger to the multiple battery balanced.
2. the humidity control system of on-vehicle battery as described in claim 1, which is characterized in that the battery includes the first battery With the second battery, the compressor includes a first compressor and a second compressor, and the battery thermal management module includes the first electricity Pond thermal management module and the second battery thermal management module, the heat exchanger include First Heat Exchanger and the second heat exchanger, and described The first end of one battery thermal management module by the first triple valve respectively with the first end of the First Heat Exchanger and described balanced The first end of the first pipeline is connected in heat exchanger, and the second end of the first battery thermal management module is distinguished by the second triple valve It is connected with the second end of the first pipeline in the second end of the First Heat Exchanger and the balanced heat exchanger,
The first end of the second battery thermal management module passes through the third triple valve first end with second heat exchanger respectively It is connected with the first end of the second pipeline in the balanced heat exchanger, the second end of the second battery thermal management module passes through the 4th Triple valve is connected with the second end of the second pipeline in the second end of second heat exchanger and the balanced heat exchanger respectively, In,
The controller passes through the balanced heat exchanger by controlling first to fourth triple valve to the multiple battery Temperature carry out it is balanced.
3. the humidity control system of on-vehicle battery as claimed in claim 2, which is characterized in that the battery thermal management module packet Include the pump being arranged on the heat exchange flow path, the first temperature sensor, second temperature sensor, flow sensor；Wherein:
The pump is for making the media flow in the heat exchange flow path；
First temperature sensor is used to detect the inlet temperature for the medium for flowing into the on-vehicle battery；
The second temperature sensor is used to detect the outlet temperature for the medium for flowing out the on-vehicle battery；
The flow sensor is used to detect the flow velocity of the medium in the heat exchange flow path.
4. the humidity control system of on-vehicle battery as claimed in claim 3, which is characterized in that the battery thermal management module is also Including the media Containers being arranged on the heat exchange flow path, the media Containers are for storing and providing Jie to the heat exchange flow path Matter.
5. the humidity control system of on-vehicle battery as claimed in claim 3, which is characterized in that the battery thermal management module is also Including heater, the heater is connect with the controller, for heating the medium in the heat exchange flow path.
6. the humidity control system of on-vehicle battery as claimed in claim 2, which is characterized in that the First Heat Exchanger and first Battery cooling circuit is corresponding, and second heat exchanger is corresponding with the second battery cooling circuit, and the first battery cooling circuit It is connected with first compressor, the second battery cooling circuit is connected with second compressor.
7. the humidity control system of on-vehicle battery as described in claim 1, which is characterized in that further include: the cooling branch of car, The interior cooling branch includes the first interior cooling branch and the second interior cooling branch, the described first interior cooling branch with First compressor is connected, and the described second interior cooling branch is connected with second compressor.
8. the humidity control system of on-vehicle battery as claimed in claim 8, which is characterized in that the described first interior cooling branch The first air outlet and the second air outlet in corresponding compartment, the described second interior cooling branch correspond to the third air outlet in compartment With the 4th air outlet.
9. on-vehicle battery humidity control system as described in claim 1, which is characterized in that further include being electrically connected with the controller The battery status detection module connect, the battery status detection module are used to detect the electric current of the on-vehicle battery.
10. a kind of temperature control method of on-vehicle battery, which is characterized in that on-vehicle battery humidity control system includes and multiple electricity Multiple battery thermal management modules that the heat exchange flow path in pond is respectively connected with are connected with the multiple battery thermal management module more respectively A heat exchanger, the multiple compressors being connected respectively with the multiple heat exchanger are connected with the multiple battery thermal management module And balanced heat exchanger with the multiple heat exchanger parallel connection, wherein a part in the multiple battery thermal management module with The first pipeline in the equilibrium heat exchanger is connected, and another part in the multiple battery thermal management module balanced is changed with described The second pipeline in hot device is connected, and the described method comprises the following steps:
Obtain the temperature of the multiple battery；
Judge whether the temperature difference between the multiple battery is greater than preset temperature threshold；
If the temperature difference is greater than the preset temperature threshold, by the balanced heat exchanger to the temperature of the multiple battery Degree carries out balanced.
11. the temperature control method of on-vehicle battery as claimed in claim 10, which is characterized in that the battery includes the first electricity Pond and the second battery, the compressor include a first compressor and a second compressor, and the battery thermal management module includes first Battery thermal management module and the second battery thermal management module, the heat exchanger include First Heat Exchanger and the second heat exchanger, described The first end of first battery thermal management module by the first triple valve respectively with the first end of the First Heat Exchanger and it is described The first end of the first pipeline is connected in weighing apparatus heat exchanger, and the second end of the first battery thermal management module passes through the second triple valve point It is not connected with the second end of the first pipeline in the second end of the First Heat Exchanger and the balanced heat exchanger,
The first end of the second battery thermal management module passes through the third triple valve first end with second heat exchanger respectively It is connected with the first end of the second pipeline in the balanced heat exchanger, the second end of the second battery thermal management module passes through the 4th Triple valve is connected with the second end of the second pipeline in the second end of second heat exchanger and the balanced heat exchanger respectively, In, carrying out equilibrium to the temperature of the multiple battery by the balanced heat exchanger includes:
It is balanced to be carried out by the balanced heat exchanger to the temperature of the multiple battery by controlling the triple valve.
12. the temperature control method of on-vehicle battery as claimed in claim 11, which is characterized in that further include:
The temperature for obtaining the battery adjusts actual power；
Obtain the temperature regulatory demand power of the battery；
Actual power is adjusted according to the temperature and the temperature regulatory demand power controls the refrigeration work consumption of compressor.
13. the temperature control method of on-vehicle battery as claimed in claim 12, which is characterized in that described according to the temperature tune Section actual power and the temperature regulatory demand power control the refrigeration work consumption of compressor, comprising:
When the temperature, which adjusts actual power, is less than the temperature regulatory demand power, increase the refrigeration function of the compressor Rate.
14. the temperature control method of on-vehicle battery as claimed in claim 13, which is characterized in that described according to the temperature tune Section actual power and the temperature regulatory demand power control the refrigeration work consumption of compressor, further includes: when the temperature When adjusting actual power less than the temperature regulatory demand power, increase battery where the First Heat Exchanger and the second heat exchanger The aperture of cooling circuit.
15. the temperature control method of on-vehicle battery as claimed in claim 13, which is characterized in that the First Heat Exchanger and One battery cooling circuit is corresponding, and second heat exchanger is corresponding with the second battery cooling circuit, and first battery cools back Road is connected with first compressor, and the second battery cooling circuit is connected with second compressor, and the method is also wrapped It includes:
Freeze when to the battery, and the temperature of first battery be greater than second battery temperature when, increase institute It states the aperture of the first battery cooling circuit and reduces the aperture of the second battery cooling circuit；
Freeze when to the battery, and the temperature of second battery be greater than first battery temperature when, increase institute It states the aperture of the second battery cooling circuit and reduces the aperture of the first battery cooling circuit.
16. the temperature control method of on-vehicle battery as claimed in claim 10, which is characterized in that the temperature of the on-vehicle battery Regulating system further include: the cooling branch of car, the car cooling circuit include that the first interior cooling circuit and second are interior cold But circuit, the method also includes:
Judge whether the temperature of the battery reaches third preset temperature；
If reaching the third preset temperature, opening for the described first interior cooling circuit and the second interior cooling circuit is reduced Degree, while increasing the aperture of the first battery cooling circuit and the second battery cooling circuit；
If the not up to described third preset temperature, further judge whether temperature reaches air-conditioning set temperature in compartment；
If reaching the air-conditioning set temperature, opening for the described first interior cooling circuit and the second interior cooling circuit is reduced Degree, while increasing the aperture of the first battery cooling circuit and the second battery cooling circuit.
17. the temperature control method of on-vehicle battery as claimed in claim 16, which is characterized in that first car cools back Road corresponds to the first air outlet and the second air outlet in compartment, and the described second interior cooling circuit corresponds to the third in compartment Air outlet and the 4th air outlet, the method also includes:
When the temperature of first air outlet and the second air outlet is greater than the temperature of the third air outlet and the 4th air outlet, Increase the aperture of the described first interior cooling circuit and reduces the aperture of the described second interior cooling circuit；
When the temperature of first air outlet and the second air outlet is less than the temperature of the third air outlet and the 4th air outlet, Increase the aperture of the described second interior cooling circuit and reduces the aperture of the described first interior cooling circuit.
18. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program The temperature control method of the on-vehicle battery as described in any one of claim 10-17 is realized when being executed by processor.
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