CN108899615B - Multistage heating device based on low-temperature plane heat pipe and heating control method - Google Patents

Multistage heating device based on low-temperature plane heat pipe and heating control method Download PDF

Info

Publication number
CN108899615B
CN108899615B CN201810612341.2A CN201810612341A CN108899615B CN 108899615 B CN108899615 B CN 108899615B CN 201810612341 A CN201810612341 A CN 201810612341A CN 108899615 B CN108899615 B CN 108899615B
Authority
CN
China
Prior art keywords
heating
temperature
low
battery module
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810612341.2A
Other languages
Chinese (zh)
Other versions
CN108899615A (en
Inventor
徐晓明
傅家麒
李仁政
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu University
Original Assignee
Jiangsu University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN201810612341.2A priority Critical patent/CN108899615B/en
Publication of CN108899615A publication Critical patent/CN108899615A/en
Application granted granted Critical
Publication of CN108899615B publication Critical patent/CN108899615B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a multistage heating device based on a low-temperature plane heat pipe and a heating control method, wherein the heating control method comprises the following steps: heating water pipe, low temperature plane heat pipe, heating plate, heat conduction pad, radiation shield. The low-temperature plane heat pipe is inserted into the heating water pipe; two ends of an external low-temperature plane heat pipe section of the heating water pipe are respectively provided with a heating sheet, and the heat generated by the heating sheets can be adjusted according to the distributed heating power; the outer layer of the heating sheet is provided with a heat insulation sleeve to reduce the loss of heat generated by the contact of the heat generated by the heating sheet and air; the heat conducting pad is arranged on the middle part of the low-temperature plane heat pipe, the battery module is installed on the heat conducting pad, the heat conducting capacity of the battery module and the low-temperature plane heat pipe is improved, and the heating time of the battery module is guaranteed. When the device is used, the temperature difference of the battery module is monitored in real time through the thermal management control device to adjust the heating power so that the battery module is heated uniformly, and then the total power is distributed in real time according to the theoretical heating time so as to adjust the actual heating time of the battery module.

Description

Multistage heating device based on low-temperature plane heat pipe and heating control method
Technical Field
The invention relates to the technical field of battery module heating, in particular to a multistage heating device based on a low-temperature plane heat pipe and a control method.
Background
At present, urban rail transit vehicles at home and abroad adopt power supplies, and the power supply systems are DC 750V and DC 1500V. Once a fault occurs, the interruption of traction power supply is caused, the quality of urban rail transit operation is affected, and operation loss is caused. The rail car is provided with an emergency traction battery pack system, and under the condition of vehicle failure, the train is switched into an emergency self-traction mode, and the train is driven to the nearest station by the emergency traction battery pack system configured by the train. The battery pack is used as a main emergency traction source, and has high power and high voltage level, so the battery pack management is particularly important. The discharge capacity of the battery pack is greatly reduced in a low-temperature environment, the discharge capacity is reduced, and if the environmental temperature is too low, the battery pack can not discharge. In order to ensure that the battery pack can normally work in a low-temperature environment and reduce the residence time of a rail train, a heating system of the battery pack is of great importance.
The heating mode of the emergency traction battery pack system is similar to the heating mode of the battery pack of the electric automobile, heating liquid conducts heat to the battery pack through the planar heat pipe, but the heating efficiency of the heating mode is low, the temperature difference of the battery pack is increased, the thermal balance of the battery pack is reduced, the discharge capacity of the battery pack is reduced, and the endurance mileage of a rail train under the emergency traction battery pack system is influenced.
The invention discloses a battery heating system and a battery heating control method with the patent publication number CN106602179A, published 2017, 4 and 26, and the application discloses a battery heating system and a battery heating control method, and the defects are that: 1. the heating system disclosed by the patent of the invention can only be suitable for the common low-temperature environment (-15-0 ℃), but can not be suitable for the extreme low-temperature environment at-50 ℃; 2. the time required to heat the battery to a certain temperature value is relatively long.
The invention discloses a novel method for quickly heating a lithium battery, which is disclosed in patent publication No. CN105428753A, publication No. 2016, 3, 23, and the invention has the defects that the principle of the invention is resistance heating, and the uneven heating can be caused in sequence due to the uneven distribution of the resistance of alternating internal resistance, so that the thermal balance of the battery is reduced.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a multistage heating device based on a low-temperature planar heat pipe and a control method thereof, which are used for heating a battery pack of an emergency traction battery pack system of a rail transit train in a low-temperature environment, so as to ensure that the battery pack can reach an optimal discharge temperature range in a short time at an extremely low temperature, improve the thermal equilibrium of the battery pack, and ensure the endurance mileage of the rail train in the emergency traction battery pack system.
In order to achieve the purpose, the invention provides the following technical scheme:
a multi-stage heating device based on a low-temperature plane heat pipe comprises a battery box cover, a heat conducting pad, a heat insulating sleeve, a heat management control device, a battery box body, a battery module, a heating sheet, a heating water pipe, a low-temperature plane heat pipe, a high-pressure main positive interface, a low-pressure control interface, a heating interface, a high-pressure main negative interface, an elastic supporting pad and a battery module reinforcing rib. The battery module is used as a main power output element and is arranged in the battery box body, the battery module reinforcing ribs are welded with the battery box body, the battery module is supported and fixed by the battery module reinforcing ribs, the low-temperature plane heat pipe is a high-heat-conduction element and can work at 50 ℃ below zero and is arranged at the bottom of the battery module, the battery module and the low-temperature plane heat pipe are separated by a heat conduction pad, and the heat conduction pad is compressible silicon rubber and has the functions of insulation, flame retardance, heat conduction and filling of an assembly gap between the battery module and the low-temperature plane heat pipe. The elastic supporting pad is arranged below the low-temperature plane heat pipe and used for supporting and fixing the plane heat pipe. The heating sheets are arranged at the positions close to the two ends in the middle of the low-temperature plane heat pipe, the two ends of the low-temperature plane heat pipe extend to the outer side of the battery box body and are inserted into the heating water pipe, and the low-temperature plane heat pipe exposed outside the battery box body wraps the heat insulation sleeve. The heat management control device is arranged on the inner wall of the battery box body, and the high-voltage main positive interface, the low-voltage control interface, the heating interface and the high-voltage main negative interface are used as electric connection plug-ins and are arranged on one side of the battery box body. The high-voltage main positive interface and the high-voltage main negative interface are respectively connected with the positive electrode and the negative electrode of the battery module to output high-voltage electricity; the low-voltage control interface is connected with the thermal management control device through a low-voltage wire harness, and transmits a signal detected by the thermal management control device to the emergency traction battery pack system control device; the heating interface is connected with the heating sheet by a low-voltage wire harness.
A multi-stage heating device based on a low-temperature plane heat pipe has the basic working principle that: let in the heating fluid that is far above ambient temperature in the external connection heating water pipe, inside low temperature plane heat pipe was heated the start and conducts the heat to the battery box fast, conducts heat and begins to heat the battery module via the heat conduction pad, and the radiation shield is used for reducing low temperature plane heat pipe and external heat exchange in order to promote heat exchange efficiency. At the outlet end of the heating water pipe, the self temperature of the heating liquid is reduced after heat transfer, so that the temperature difference exists between the battery modules, and the performance and the service life of the battery are influenced. The thermal management control device can detect the temperature difference among the battery modules and output a low-voltage signal to control the heating sheet to work at variable heating power so as to make up the temperature difference among the battery modules and reduce the heating time for enabling the battery modules to reach the starting condition.
In combination with the multi-stage heating device based on the low-temperature plane heat pipe, the invention provides the following control method:
aiming at the working principle of a multistage heating device based on a low-temperature plane heat pipe, the invention provides a multistage heating control method based on the low-temperature plane heat pipe, which comprises the following steps: the initial temperature of thermal management control device detection battery module, whether the temperature of judging the battery module reaches best operating temperature T', if reach, thermal management control device gives emergent traction battery group system controlling means with temperature signal transmission, and control battery module normally discharges, if not reach, then judge once more whether reach the minimum discharge temperature T0 of battery module, have two kinds of situations: 1. when the lowest discharge temperature T0 of the battery is reached, the thermal management control device transmits a temperature signal to the emergency traction battery pack system control device, controls the battery module to perform low-temperature discharge self-heating, namely, enters a multi-stage heating process in a temperature discharge mode, and starts the heating sheet to perform multi-stage heating until the optimal working temperature T' of the battery module is reached within a specified time; 2. and if the lowest discharge temperature T0 is not reached, the battery module is not started to discharge and self-heat, the battery module enters a multi-stage preheating process until the lowest discharge temperature T0 of the battery module is reached within a specified time, and then the multi-stage heating process in a low-temperature discharge mode is entered.
The multistage preheating process comprises the following steps: thermal management control device(4) Setting multi-stage preheating time T1, detecting the ambient temperature, calculating the total heating power P required by the battery module (6) to reach the lowest discharge temperature T0, and averagely distributing the total heating power to the battery modules m1、m2、m3、……mnThe corresponding heating plate (7) starts to be electrified and heated; in the heating process, the thermal management control device (4) monitors m in real time1、m2、m3、……mnTemperature T of1、T2、T3、……TnAnd calculate m1、m2、m3、……mnTemperature difference | T between2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature difference is less than 2 ℃, the thermal management control device (4) judges whether the temperature difference is less than 2 ℃ or not2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature is more than 2 ℃, the thermal management control device (4) will carry out thermal management on the battery module m according to the temperature difference value1、m2、m3、……mnCorresponding to the heating power P of the heating sheet (7)1、P2、P3、……PnIncrease to P1、P2+ΔP21、P3+ΔP31、……Pn+ΔPn1And detecting T in real time1、T2、T3、……TnUp to a temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1I is less than 2 ℃; if the temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1If | is less than 2 ℃, the battery module m is judged1、m2、m3、……mnWhether the temperature reaches the lowest discharge temperature T0 or not, if not, continuing to electrify and heat; if the lowest discharge temperature T0 is reached, a multi-stage heating process in a low-temperature discharge mode is entered.
The multi-stage heating process under low-temperature discharge is as follows: when the battery module m1、m2、m3、……mnTemperature T1、T2、T3、……TnThe lowest discharge temperature T0 of the battery module discharge is reached, and the emergency traction battery pack system control device controls the battery module m1、m2、m3、……mnDischarging at low rate to generate heat, setting low-temperature discharge multistage heating time t2 and calculating total power P 'required by heating in the current state by the thermal management control device (4), and averagely distributing the total power P' to m by the thermal management control device (4)1、m2、m3、……mnThe corresponding heating plate starts to be electrified and heated; the thermal management control device (4) detects T in real time1、T2、T3、……TnAnd calculate m1、m2、m3、……mnTemperature difference | T between2-T1|、|T3-T2|、……|Tn-Tn-1If | T2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature is more than 2 ℃, the heat management control device (4) will carry out heating power P on the heating sheets corresponding to m1, m2 and m3 according to the value of the temperature difference1’、P2’、P3’、……Pn' adjustment to P1’、P2’+ΔP21’、P3’+ΔP31’、……Pn’+ΔPn1', direct temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1I is less than 2 ℃; if the temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1If the | is less than 2 ℃, judging whether the battery module (6) reaches the optimal working temperature T', if not, continuing to perform power-on heating while discharging at low rate; and if the optimal working temperature T' is reached, stopping the multistage heating process and starting the emergency traction battery pack system.
The invention has the beneficial effects that:
(1) the multistage heating device based on the low-temperature plane heat pipe and the control method can work under the extreme cold working condition of 50 ℃ below zero.
(2) The time required by the emergency traction battery system heated by the multistage heating device based on the low-temperature plane heat pipe and the control method disclosed by the invention is greatly reduced, so that the residence time of the rail transit train in an operation zone is shortened.
(3) The multistage heating device based on the low-temperature plane heat pipe and the control method disclosed by the invention have the advantages that the temperature difference between the modules is controlled within a smaller range, the heat balance of the battery modules is improved, and the rail transit train can have a longer driving range.
Drawings
Fig. 1 is an exploded view of a battery module heating apparatus according to an embodiment of the present invention
FIG. 2 is a diagram of the positions of the power-on and signal transmission interfaces of the battery pack according to the embodiment of the present invention
FIG. 3 is a diagram of a relationship between a low-temperature planar heat pipe and a heat patch according to an embodiment of the present invention
FIG. 4 is a block diagram of a multi-stage heating control method based on low-temperature planar heat pipes according to an embodiment of the present invention
FIG. 5 is a flowchart illustrating a multi-stage preheating operation of a multi-stage heating control method according to an embodiment of the present invention
FIG. 6 is a flowchart illustrating the multi-stage heating operation in the low-temperature discharge mode of the multi-stage heating control method according to the embodiment of the present invention
Wherein: 1-battery box cover, 2-heat conducting pad, 3-heat insulating sleeve, 4-thermal management control device, 5-battery box body, 6-battery module, 7-heating sheet, 8-heating water pipe, 9-low temperature plane heat pipe, 10-high pressure total positive interface, 11-low pressure control interface, 12-heating interface, 13-high pressure total negative interface, 14-elastic supporting pad, 15-battery module reinforcing rib
Detailed Description
The embodiment of the invention discloses a multistage heating device based on a low-temperature plane heat pipe and a control method, which are used for an emergency traction battery pack system of a rail transit train and can ensure that the emergency traction battery pack system can reach the optimal temperature range of battery pack operation in a short time at an extremely low temperature.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
As shown in fig. 1-3, the multi-stage heating device based on the low-temperature planar heat pipe according to the embodiment of the present invention includes a battery box cover 1, a heat conducting pad 2, a heat insulating sleeve 3, a thermal management control device 4, a battery box 5, a battery module 6, a heating sheet 7, a heating water pipe 8, a low-temperature planar heat pipe 9, a high-pressure main positive interface 10, a low-pressure control interface 11, a heating interface 12, a high-pressure main negative interface 13, an elastic supporting pad 14, and a battery module reinforcing rib 15. The battery module 6 is used as a main power output element and is arranged in the battery box body 5, the battery module reinforcing ribs 15 are welded with the battery box body 5, the battery module 6 is supported and fixed by the battery module reinforcing ribs 15, the low-temperature plane heat pipe 9 is a high heat conduction element and can work at 50 ℃ below zero and is arranged at the bottom of the battery module 6, the battery module 6 and the low-temperature plane heat pipe 9 are separated by the heat conduction pad 2, and the heat conduction pad 2 is compressible silicon rubber and has the functions of insulation, flame retardance, heat conduction and filling of an assembly gap between the battery module 6 and the low-temperature plane heat pipe 9. The elastic supporting pad 14 is arranged below the low-temperature plane heat pipe 9 and used for supporting and fixing the low-temperature plane heat pipe 9 at the bottom of the battery box body 5. The heating sheets 7 are arranged at the middle of the low-temperature plane heat pipe 9 close to the two ends, the two ends extend to the outer side of the battery box body 5 and are inserted into the heating water pipe 8, and the low-temperature plane heat pipe 9 exposed outside the battery box body 5 wraps the heat insulation sleeve 3. The thermal management control device 4 is installed on the inner wall of the battery box body 5, and the high-voltage main positive interface 10, the low-voltage control interface 11, the heating interface 12 and the high-voltage main negative interface 13 are arranged on one side of the battery box body 5 as electric connection connectors. The high-voltage main positive interface 10 and the high-voltage main negative interface 13 are respectively connected with the positive electrode and the negative electrode of the battery module 6 to output high-voltage electricity, the low-voltage control interface 11 is connected with the thermal management control device 4 through a low-voltage wire harness, and the heating interface 12 is connected with the heating sheet 7 through a low-voltage wire harness.
As shown in fig. 1 to fig. 3, a multistage heating device based on a low-temperature planar heat pipe according to an embodiment of the present invention has the following basic operation principle: let in the heating fluid that is far above ambient temperature in external heating water pipe 8, low temperature plane heat pipe 9 is heated and is started and conduct the heat to battery box 5 inside fast, conducts heat and begins to heat battery module 6 via heat conduction pad 2, and radiation shield 3 is used for reducing low temperature plane heat pipe 9 and external heat exchange in order to promote heat exchange efficiency. At the outlet end of the heating water pipe 8, the self temperature of the heating liquid is reduced after heat transfer, so that the temperature difference exists between the battery modules 6, and the performance and the service life of the battery are influenced. The thermal management control device 4 may detect a temperature difference between the battery modules 6 and output a low voltage signal to control the heating sheet 7 to operate at a variable heating power to compensate for the temperature difference between the battery modules 6 and reduce a heating time for the battery modules 6 to reach a starting condition.
As shown in fig. 4, an embodiment of the present invention provides a multi-stage heating control method based on a low-temperature planar heat pipe, where the control method mainly includes:
thermal management control device 4 detects the initial temperature of battery module 6, judges whether the temperature of battery module 6 reaches best operating temperature T', if reach, thermal management control device 4 gives emergent traction battery group system controlling means with temperature signal transmission, and control battery module 6 normally discharges, if not reach, then judge once more whether reach the minimum discharge temperature T0 of battery module 6, have two kinds of situations: 1. when the lowest discharge temperature T0 of the battery is reached, the thermal management control device 4 transmits a temperature signal to the emergency traction battery pack system control device, controls the battery module 6 to enter a multistage heating process in a low-temperature discharge mode, and starts the heating sheet 7 to carry out multistage heating until the optimal working temperature T' of the battery module 6 is reached within a specified time; 2. if the lowest discharge temperature T0 is not reached, the battery module is not started to discharge and self-heat, the multi-stage preheating process is carried out until the lowest discharge temperature T0 of the battery module 6 is reached within the specified time, and then the multi-stage heating process in the low-temperature discharge mode is carried out.
The multistage preheating process comprises the following steps:
with 3 battery modules m1、m2、m3For example, the thermal management control device 4 sets the multi-stage warm-up time t1 and detects the ambient temperature to calculate the maximum battery module 6The total heating power P required by the low discharge temperature T0 is averagely distributed to the battery modules m1、m2、m3And starting to electrify and heat the corresponding heating plate. In the heating process, the thermal management control device 4 monitors m in real time1、m2、m3Temperature T of1、T2、T3And calculate m1、m2、m3Temperature difference | T between2-T1|、|T3-T2If the temperature difference is less than 2 deg.C, the controller judges if the temperature difference is less than 2 deg.C2-T1|、|T3-T2If is greater than 2 ℃, the thermal management control device 4 will control the battery module m according to the temperature difference value1、m2、m3Corresponding heating power P of heating plate1、P2、P3Increase to P1、P2+ΔP21、P3+ΔP31And detecting T in real time1、T2、T3Up to a temperature difference | T2-T1|、|T3-T2I is less than 2 ℃; if the temperature difference | T2-T1|、|T3-T2If | is less than 2 ℃, the battery module m is judged1、m2、m3Whether the temperature reaches the lowest discharge temperature T0 or not, if not, continuing to electrify and heat; if the lowest discharge temperature T0 is reached, a multi-stage heating process in a low-temperature discharge mode is entered.
The multi-stage heating process in the low-temperature discharge mode is as follows:
with 3 battery modules m1、m2、m3For example, when the battery module m1、m2、m3Temperature T1、T2、T3The lowest temperature T0 of the battery module discharging is reached, and the emergency traction battery pack control device controls the battery module m1、m2、m3Discharging at low rate to generate heat, setting low-temperature discharge multistage heating time t2 and calculating total power P 'required by heating in the current state by the thermal management control device 4, and averagely distributing the total power P' to m by the thermal management control device 41、m2、m3 Corresponding heating plate 7 is openedAnd starting to electrify and heat. Thermal management control device 4 detects T in real time1、T2、T3And calculate m1、m2、m3Temperature difference | T between2-T1|、|T3-T2If | T2-T1|、|T3-T2If | is greater than 2 ℃, the thermal management control device 4 will control m according to the magnitude of the temperature difference1、m2、m3Corresponding heating power P of heating plate1’、P2’、P3' adjustment to P1’、P2’+ΔP21’、P3’+ΔP31', until the temperature difference | T2-T1|、|T3-T2I is less than 2 ℃; if the temperature difference | T2-T1|、|T3-T2If the | is less than 2 ℃, judging whether the battery reaches the optimal starting temperature T', if not, continuing to perform power-on heating while discharging at low rate; and if the optimal starting temperature T' is reached, stopping the multistage heating process and starting the emergency traction battery pack system. Delta P*And Δ P*' the power of the battery module is adjusted corresponding to the heating plate.
According to the technical scheme, the embodiment of the invention provides a multistage heating device based on a low-temperature plane heat pipe and a control method, the multistage heating device is formed by a heat conduction pad 2, a heat insulation sleeve 3, a heating sheet 7, a heating water pipe 8 and the low-temperature plane heat pipe 9, and the heat management control device 4 is used as a control center to form the multistage heating control method, so that the heating problem of an emergency traction battery pack system in a low-temperature environment is solved, the emergency traction battery pack system is ensured to reach an optimal temperature range of battery pack operation in a short time at an extremely low temperature, the heat balance of the battery pack is improved, and the endurance mileage of a rail train in the emergency traction battery pack system is ensured.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (7)

1. A multi-stage heating device based on a low-temperature plane heat pipe is characterized by comprising a heating water pipe (8) and a plane heat pipe; the two ends of the plane heat pipe are inserted into the heating water pipe (8); the heat conducting pad (2) is arranged on the middle part of the planar heat pipe, and the heat conducting pad (2) can be in contact with the battery module (6) to conduct heat transfer; heating sheets (7) are arranged in the middle of the planar heat pipe and close to the two ends of the planar heat pipe, and the heating sheets (7) can adjust heating power according to the temperature difference of the battery module (6) so that the battery module (6) is heated uniformly;
the plane heat pipe is a low-temperature plane heat pipe (9), and the joint of the plane heat pipe and the heating water pipe (8) is sealed;
the multi-stage heating device is integrally placed in a battery box body (5) with an openable upper cover, the battery box body (5) and the bottom of the planar heat pipe are fixed and supported through an elastic supporting pad (14), and the battery module and the battery box body (5) are fixed and supported through a battery module reinforcing rib (15);
the battery box body (5) is provided with a high-voltage main positive interface (10), a high-voltage main negative interface (13), a low-voltage control interface (11) and a heating interface (12); the high-voltage main positive interface and the high-voltage main negative interface are respectively connected with the positive electrode and the negative electrode of the battery module to output high-voltage electricity; the low-voltage control interface is connected with the thermal management control device through a low-voltage wire harness, and transmits a signal detected by the thermal management control device to the emergency traction battery pack system control device; the heating interface is connected with the heating sheet by a low-voltage wire harness.
2. A multistage heating apparatus based on a low-temperature planar heat pipe according to claim 1, wherein the outer layer of the heating sheet (7) is further wrapped with a heat insulating sleeve (3).
3. The multistage heating device based on the low-temperature plane heat pipe as claimed in claim 1, wherein a heating liquid is introduced into the heating water pipe (8).
4. A multistage heating device based on low-temperature planar heat pipes according to claim 1, further comprising a thermal management control device (4); the thermal management control device detects the temperature of the battery modules and transmits the detection result to the emergency traction battery pack system control device to control the battery modules to enter the corresponding working process, and detects the temperature difference among the battery modules and outputs a low-voltage signal to control the heating sheet to make up the temperature difference among the battery modules with variable heating power and reduce the heating time for enabling the battery modules to reach the starting condition.
5. The heating control method of the multistage heating device based on the low-temperature planar heat pipe according to any one of claims 1 to 4, characterized in that a heating liquid is introduced into the heating water pipe (8), the heating liquid heats the end of the low-temperature planar heat pipe (9), and the low-temperature planar heat pipe (9) transfers the absorbed heat to the battery module through the heat conducting pad;
in the process that the low-temperature plane heat pipe (9) transmits the absorbed heat to the battery module (6), the thermal management control device (4) is used for adjusting the thermal balance of the battery module (6) and the heating time of the battery in real time; specifically, the method comprises the following steps:
the initial temperature of thermal management control device (4) detection battery module (6), judge whether the temperature of battery module (6) reaches best operating temperature T', if reach, thermal management control device (4) transmit temperature signal for emergent traction battery group system controlling means, control battery module (6) and normally discharge, if not reach, then judge again whether reach battery module (6) minimum discharge temperature T0, there are two kinds of situations: 1) when the lowest discharge temperature T0 of the battery is reached, the thermal management control device (4) transmits a temperature signal to the emergency traction battery pack system control device, controls the battery module (6) to perform low-temperature discharge self-heating, namely, enters a multi-stage heating process in a temperature discharge mode, and starts the heating sheet (7) to perform multi-stage heating until the optimal working temperature T' of the battery module is reached within a specified time; 2) and if the lowest discharge temperature T0 is not reached, the battery module is not started to discharge and self-heat, the battery module enters a multi-stage preheating process until the lowest discharge temperature T0 of the battery module (6) is reached within a specified time, and then the multi-stage heating process is carried out in a low-temperature discharge mode.
6. The heating control method according to claim 5, wherein the multistage preheating process is as follows:
the heat management control device (4) sets multi-stage preheating time T1, detects the ambient temperature, calculates the total heating power P required by the battery module (6) to reach the minimum discharge temperature T0, and averagely distributes the total heating power to the battery modules m1、m2、m3、……mnThe corresponding heating plate (7) starts to be electrified and heated; in the heating process, the thermal management control device (4) monitors m in real time1、m2、m3、……mnTemperature T of1、T2、T3、……TnAnd calculate m1、m2、m3、……mnTemperature difference | T between2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature difference is less than 2 ℃, the thermal management control device (4) judges whether the temperature difference is less than 2 ℃ or not2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature is more than 2 ℃, the thermal management control device (4) will carry out thermal management on the battery module m according to the temperature difference value1、m2、m3、……mnCorresponding to the heating power P of the heating sheet (7)1、P2、P3、……PnIncrease to P1、P2+ΔP21、P3+ΔP31、……Pn+ΔPn1And detecting T in real time1、T2、T3、……TnUp to a temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1I is less than 2 ℃; if the temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1If | is less than 2 ℃, the battery module m is judged1、m2、m3、……mnWhether the temperature reaches the lowest discharge temperature T0 or not, if not, continuing to electrify and heat; if it has reachedAnd the lowest discharge temperature T0 enters a multi-stage heating process in a low-temperature discharge mode.
7. The heating control method according to claim 5, wherein the multi-stage heating process in the low-temperature discharge mode is as follows:
when the battery module m1、m2、m3、……mnTemperature T1、T2、T3、……TnThe lowest discharge temperature T0 of the battery module discharge is reached, and the emergency traction battery pack system control device controls the battery module m1、m2、m3、……mnDischarging at low rate to generate heat, setting low-temperature discharge multistage heating time t2 and calculating total power P 'required by heating in the current state by the thermal management control device (4), and averagely distributing the total power P' to m by the thermal management control device (4)1、m2、m3、……mnThe corresponding heating plate starts to be electrified and heated; the thermal management control device (4) detects T in real time1、T2、T3、……TnAnd calculate m1、m2、m3、……mnTemperature difference | T between2-T1|、|T3-T2|、……|Tn-Tn-1If | T2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature is more than 2 ℃, the heat management control device (4) will carry out heating power P on the heating sheets corresponding to m1, m2 and m3 according to the value of the temperature difference1’、P2’、P3’、……Pn' adjustment to P1’、P2’+ΔP21’、P3’+ΔP31’、……Pn’+ΔPn1', direct temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1I is less than 2 ℃; if the temperature difference | T2-T1|、|T3-T2|、……|Tn-Tn-1If the temperature is less than 2 ℃, judging whether the battery module (6) reaches the optimal working temperature T', if not, doubling the temperatureContinuously carrying out energization heating while discharging at a certain rate; and if the optimal working temperature T' is reached, stopping the multistage heating process and starting the emergency traction battery pack system.
CN201810612341.2A 2018-06-14 2018-06-14 Multistage heating device based on low-temperature plane heat pipe and heating control method Active CN108899615B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810612341.2A CN108899615B (en) 2018-06-14 2018-06-14 Multistage heating device based on low-temperature plane heat pipe and heating control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810612341.2A CN108899615B (en) 2018-06-14 2018-06-14 Multistage heating device based on low-temperature plane heat pipe and heating control method

Publications (2)

Publication Number Publication Date
CN108899615A CN108899615A (en) 2018-11-27
CN108899615B true CN108899615B (en) 2020-03-31

Family

ID=64345203

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810612341.2A Active CN108899615B (en) 2018-06-14 2018-06-14 Multistage heating device based on low-temperature plane heat pipe and heating control method

Country Status (1)

Country Link
CN (1) CN108899615B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109830775B (en) * 2019-01-15 2021-06-22 江苏大学 Power battery pack multistage heat dissipation system based on coupling of planar heat pipe, liquid cooling and phase change energy storage heat conduction plate and control method
CN110112499A (en) * 2019-04-09 2019-08-09 江苏大学 A kind of battery pack compound thermal management system and its control method
JP7310439B2 (en) * 2019-08-21 2023-07-19 マツダ株式会社 vehicle battery pack

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717700A (en) * 2012-07-02 2012-10-10 重庆长安汽车股份有限公司 Automobile and battery radiating structure thereof
CN104838510A (en) * 2012-12-10 2015-08-12 马勒国际公司 Heat exchanger, particularly for motor vehicle
CN105375088A (en) * 2014-08-04 2016-03-02 法雷奥热系统公司 Heat exchanger and corresponding thermal management device
CN106410326A (en) * 2016-10-31 2017-02-15 北京新能源汽车股份有限公司 Battery module for vehicle
CN106785231A (en) * 2016-12-22 2017-05-31 青岛大学 A kind of electrokinetic cell heater and control method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011078897A1 (en) * 2011-07-08 2013-01-10 Behr Gmbh & Co. Kg Temperature control device for controlling the temperature of a battery and method for producing a temperature control device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717700A (en) * 2012-07-02 2012-10-10 重庆长安汽车股份有限公司 Automobile and battery radiating structure thereof
CN104838510A (en) * 2012-12-10 2015-08-12 马勒国际公司 Heat exchanger, particularly for motor vehicle
CN105375088A (en) * 2014-08-04 2016-03-02 法雷奥热系统公司 Heat exchanger and corresponding thermal management device
CN106410326A (en) * 2016-10-31 2017-02-15 北京新能源汽车股份有限公司 Battery module for vehicle
CN106785231A (en) * 2016-12-22 2017-05-31 青岛大学 A kind of electrokinetic cell heater and control method

Also Published As

Publication number Publication date
CN108899615A (en) 2018-11-27

Similar Documents

Publication Publication Date Title
CN108899615B (en) Multistage heating device based on low-temperature plane heat pipe and heating control method
KR102457327B1 (en) Battery system with adjustable heating rate and control method therefor
JP6687895B2 (en) Vehicle fuel cell warm-up device
CN102484272B (en) Method for cold starting a fuel cell system and fuel cell system of a motor vehicle
US8935023B2 (en) Secondary battery system and vehicle having secondary battery system
CN103682519B (en) Low-temperature environment of electric vehicle heating means
WO2018113750A1 (en) Fuel cell system and fuel cell vehicle
CN202282431U (en) Power battery heating system of electric vehicle
CN209581201U (en) A kind of battery system of adjustable heating speed
JP7493860B2 (en) Electric vehicle, its control system and electric heating device
CN106058371B (en) A kind of new-type external water cooling electrokinetic cell system and its control method based on heat conductive silica gel
CN102308427A (en) Method for managing the heat in an electric battery
CN109638386B (en) Automobile and heating and power battery heating system and method
CN108232238B (en) Fuel cell system, control method and fuel cell automobile
CN102308428A (en) Method for managing the heat in an electric battery
JP2002034171A (en) Power control method for electric motor car
CN110474119A (en) A kind of Li-ion batteries piles heat management system and its thermal management algorithm
CN108550929A (en) A kind of battery thermal management method and system of electric vehicle low temperature charging
KR20110040063A (en) Battery preheating device for hybrid vehicle and method for controlling the same
CN110626213A (en) Power battery heating device of electric automobile and control method
CN113363621A (en) Electric automobile cold start system based on eddy current heating
CN102456932B (en) A kind of charging method of battery and device
CN112865216B (en) Low-charge energy management system and method for pure electric vehicle
KR20230086386A (en) Electric vehicle charging apparaturs and control method thereof
CN109017407A (en) A kind of battery heat exchange control device, charging pile and battery heat-exchange system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant