CN109378548A - Method for power battery pack hold over system - Google Patents
Method for power battery pack hold over system Download PDFInfo
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- CN109378548A CN109378548A CN201811292339.8A CN201811292339A CN109378548A CN 109378548 A CN109378548 A CN 109378548A CN 201811292339 A CN201811292339 A CN 201811292339A CN 109378548 A CN109378548 A CN 109378548A
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- storage heater
- refrigerant
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000009825 accumulation Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000001172 regenerating effect Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000003507 refrigerant Substances 0.000 claims description 74
- 238000004064 recycling Methods 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 5
- 230000002452 interceptive effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005338 heat storage Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- H01M10/613—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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—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
-
- 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
- H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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 present invention relates to a kind of methods for battery pack hold over system.This method based on battery pack temperature, environment temperature and storage heater can regenerative capacity to determine whether needing to carry out accumulation of heat；And judge vehicle will continuous service time；Thereby executing heat storage operation, executes heating operation or execute cooling down operation.This method to collect its partial heat during battery pack works, and stores into storage heater, to quickly be heated using the heat of collection to battery pack when the temperature of battery pack is reduced under optimum working temperature range.
Description
Technical field
The invention belongs to battery heat storage technology fields, and in particular to a method of for battery pack hold over system.
Background technique
The battery life of electric vehicle is influenced at present and a key factor of performance is the operation under low temperature environment.?
Under low temperature environment, when electric vehicle lies on the table too long or because other reasons cause battery pack temperature lower than its optimal work
When temperature, need to preheat battery pack to promote battery pack temperature, it is ensured that charging performance and discharge performance under low temperature with
And safety.
Summary of the invention
It is an object of the invention to propose a kind of method for Vehicular dynamic battery group hold over system.
It is realized especially by following technological means:
A kind of method of Vehicular battery group hold over system, the hold over system include: battery pack, storage heater, radiator, refrigeration
Device, temperature sensor, refrigerant and refrigerant tubing.
The refrigerant tubing is for being connected to battery pack, storage heater, radiator and refrigerator, and refrigerant is in the system
Cryogen pipeline internal circulation flow；Connection between the refrigerator and radiator is to be connected in parallel, storage heater and battery pack and system
Connection between cooler and radiator is to be connected in series.
The connection of the hold over system includes four circuits, is respectively as follows: storage heater circuit, chiller circuit, radiator time
Road and bypass circulation；Wherein, storage heater circuit is sequentially connected battery pack and storage heater by refrigerant tubing, for making accumulation of heat
Battery pack is heated in device accumulation of heat；Chiller circuit, which is passed through, is sequentially connected battery pack and refrigerator by refrigerant tubing, for making
Battery pack is cooling；Radiator loop is sequentially connected battery pack and radiator by refrigerant tubing, for making battery pack radiate；It is other
It only include battery pack in logical circuit, for making battery pack keep the present situation.
The temperature sensor is separately mounted in the refrigerant tubing at the inlet side and outlet side of battery pack, with respectively
Measure temperature T1 of the refrigerant before flowing into battery pack and flow out the temperature T2 of the refrigerant of battery pack, thus according to T1 with
The difference T of T2 judges battery pack temperature.
During the method for the Vehicular battery group hold over system includes the following steps:
S1. first threshold, second threshold, third threshold value, low temperature limit temperature and storage heater capacity threshold lower limit and storage are set
The hot device capacity threshold upper limit, wherein then second threshold > first threshold > third threshold value > low temperature limit temperature is passed according to temperature
The measurement result of sensor determines battery pack temperature, and judges battery pack temperature and the first threshold, second threshold, third
The relationship of threshold value and low temperature limit temperature.
S2. the current capacities of storage heater are detected, so that judging whether storage heater has can regenerative capacity, wherein work as accumulation of heat
Device capacity be lower than storage heater capacity threshold lower limit when, show have can regenerative capacity.
When battery pack temperature be greater than first threshold and be less than second threshold, and storage heater capacity be lower than capacity threshold lower limit
When, execute step S4.
When battery pack temperature be greater than first threshold and be less than second threshold, and storage heater capacity be higher than the capacity threshold upper limit
When, S6 is executed, is cooled so that flowing to heat rejector refrigerant, so that making the temperature of battery pack after flowing through battery pack reduces.
When battery pack temperature is greater than second threshold, S6 and S7 is executed, so that by the system of heating after flowing through battery pack
Cryogen flows through refrigerator and radiator and reduces the temperature of refrigerant, so that the temperature of battery pack be made to reduce rapidly.
When battery pack temperature is less than first threshold and is greater than third threshold value, S8 is executed.
When battery pack temperature is less than third threshold value and is greater than low temperature limit temperature, S3 is executed.
S3. first time threshold is set, by the interactive interface between vehicle and user, requests vehicle that will transport to user
The row time, thus judge vehicle will continuous service time, and determine continuous working period and first time threshold relationship；
If the continuous working period is greater than first time threshold, S8 is executed；If the continuous working period is less than first time threshold,
Execute S5.
S4. by recycling refrigerant in storage heater circuit, and it is heated storage heater using flowing through battery pack
Refrigerant carry out accumulation of heat.
S5. by recycling refrigerant in storage heater circuit, using storage heater to the refrigerant in storage heater circuit into
Row heating, and the refrigerant of heating is made to flow through battery pack, to be heated to battery pack.
S6. by recycling refrigerant in radiator loop, so that the cooled refrigerant for flowing through radiator flows through
Battery pack, and reduce battery pack temperature.
S7. by making to recycle in chiller circuit, so that the cooled refrigerant for flowing through refrigerator flows through battery pack,
And reduce rapidly battery pack temperature.
S8. by recycling refrigerant in bypass circulation, and the Current Temperatures of battery pack are kept.
Preferably, the method also includes: while executing step S1, also detect current environmental temperature.
Preferably, the method also includes: if detecting current environmental temperature lower than low temperature environment threshold in step S1
Value, and battery pack temperature executes S5 less than third threshold value and when being greater than low temperature limit temperature.
Preferably, the method also includes: setting second time threshold, wherein the second time threshold is greater than first
Time threshold, when step S1 detects current environmental temperature lower than low temperature environment threshold value, if passing through the interactive interface
The time that the vehicle requested to user will stop is greater than second time threshold, then executes S4, holds until storage heater capacity is higher than
Until measuring upper threshold.
Preferably, first measuring T and battery pack temperature T before carrying out step S1, empirical a is determined, so that T
× a=T, to directly adopt T × a when judging battery pack temperature T in the next steps to be judged.
Effect of the invention is that:
1, storage heater circuit is designed, so that collecting waste heat during battery pack work, and is stored into storage heater, thus
When the temperature of battery pack is reduced under optimum working temperature range, battery pack is quickly heated using the heat of collection,
Meanwhile at low ambient temperatures, so that vehicle can quickly recover to optimum working temperature range after of short duration stopping, this makes in electricity
Heat dissipation is combined with accumulation of heat when pond works, has saved the consumption of battery heating cost and battery.
2, increase battery pack temperature, environment temperature and storage heater capacity Rule of judgment so that Rule of judgment " storage heater
Capacity " is combined closely with Rule of judgment " battery pack temperature " and " environment temperature ", to determine whether needing to carry out accumulation of heat, to have
Accumulation of heat cost is reduced conducive to heat storage efficiency is improved.
3, Rule of judgment " vehicle hour " is increased, so that the control of Vehicular battery accumulation of heat and the operation of driver
It is fitted close, heat storage efficiency on the one hand can be further increased by feedback of the driver to the continuous working period, on the other hand,
Optimal accumulation of heat scheme can be executed according to the feedback of driver, so that battery improves within the scope of being in optimum working temperature always
Battery life and cycle-index, while being conducive to increase economic efficiency.
By the way that bypass circulation is arranged, so that hold over system can acquire in real time electricity according to the information of battery temperature sensor
The temperature information of pond group is conducive to the real-time management of the accurate control and accumulation of heat that carry out battery pack temperature.
Detailed description of the invention
Fig. 1 is the schematic diagram of battery pack regenerative structure.
Fig. 2 is the schematic diagram of battery pack hold over system.
Wherein: 1- battery pack, 2- refrigerant tubing, 3- heat exchange material, 4- radiator, 5- refrigerator, 6A/6B/11- are mono-
To valve, 7- storage heater, 8- pump, 9- battery system, 10- temperature sensor.
Specific embodiment
The operating temperature range of battery pack is generally 10 DEG C -50 DEG C.At low ambient temperatures, the active volume of battery pack and longevity
Life can obviously reduce, and while charging at low ambient temperatures to battery pack is extremely difficult to its maximum charge capacity, in battery
Group after a period of work, since confined space and battery heat radiation are larger, causes battery pack temperature that may rise to the first threshold
Value, battery be higher than first threshold at a temperature of work when equally will affect battery life and active volume.
The heat generated when at low ambient temperatures, by normal battery operation gathers together, and whenever necessary to battery or
Other devices, which carry out heating, can be improved battery life.
Referring to Fig.1, battery pack regenerative structure includes battery pack 1 and refrigerant tubing 2.It can be by the arrangement of battery pack 1
Change the arrangement form of refrigerant tubing 2.For example, refrigerant tubing 2 can be arranged as by mode shown in Fig. 1 it is continuous U-shaped
Pipeline, or refrigerant tubing 2 can be arranged on the bottom fixed board and side fixed plate of all batteries group 2, to simplify knot
Structure.Refrigerant tubing 2 can be mode as shown in Figure 1 and be arranged as single perforation pipeline, can also be arranged as multiple arranged side by side
Penetrate through pipeline.
The outside of refrigerant tubing 2 can also coat heat exchange material 3(for example, heat conductive silica gel gasket), to promote battery pack 1
Heat exchanged with the heat between the heat exchange medium (for example, refrigerant) in refrigerant tubing 2.Battery pack generates when working
Heat the refrigerant in refrigerant tubing 2 is transferred to by heat conductive silica gel gasket, expanded with heat and contract with cold by coolant liquid circulate by
Heat is taken away, make entire battery pack temperature equalization it is unified.
The good insulation performance of heat-conducting silica gel sheet and high rebound toughness, can effectively avoid the vibration between battery cell
Rub damaging problem, the short-circuit hidden danger between battery cell.
Referring to Fig. 2, battery pack hold over system further includes storage heater 7, radiator 4, refrigerator 5, temperature sensor 10 and electricity
11) and pump 8 pond group (battery system) 9, refrigerant, refrigerant tubing and multiple check valves (6A, 6B and.
Refrigerant tubing is for being connected to battery pack, storage heater, radiator and refrigerator, and refrigerant is in the refrigerant
Pipeline internal circulation flow.Connection between refrigerator and radiator is to be connected in parallel, storage heater and battery pack and refrigerator and scattered
Connection between hot device is to be connected in series.2 temperature sensors 10 be separately mounted to battery pack (battery system) 9 inlet side and
In refrigerant tubing at outlet side, to measure temperature T1 and outflow battery pack of the refrigerant before flowing into battery pack respectively
Refrigerant temperature T2, to judge battery pack temperature according to the difference T of T1 and T2.
It is preferred that first measuring T and battery pack temperature T when correspondence each particular battery, determining empirical a, make
T × a=T is obtained, to be judged when judging battery pack temperature T in the next steps using T × a.
It, can when battery pack temperature is higher than first threshold (for example, 50 DEG C) after battery system 9 has run a period of time
Start the accumulation of heat of battery system.
Specifically, when temperature sensor 10 detects that battery system temperature is higher than first threshold (for example, 50 DEG C), starting
Pump 8 carries out the circulation of refrigerant.The refrigerant being stored in storage heater 7 flows through battery system, and and battery under the action of pump
System carries out heat exchange, takes away the excessive heat of battery system radiation.
It is fast so as to radiated to refrigerant or be cooled down by the way that radiator 4 and refrigerator 5 are arranged in hold over system
Speed reduces the temperature of refrigerant, realizes the rapid cooling of battery system.
In addition, also heater can be arranged in storage heater 7, to add whenever necessary to the refrigerant in storage heater
Heat, to realize the heating to battery system.For example, when charging to the battery shelved under low temperature environment too long, Huo Zhe
When electric vehicle too long is shelved in starting under low temperature environment.
With continued reference to Fig. 2, the heat accumulation method of battery pack system is now specifically described.Heat accumulation method starts in step 1, and
Step 2 determines the need for carrying out accumulation of heat, specifically, according to storing for the temperature of present battery, environment temperature and storage heater
Thermal capacity, to determine the need for carrying out accumulation of heat.If the temperature of present battery system be higher than first threshold (for example, 50 DEG C) and
Simultaneously lower than low temperature environment threshold value (for example, environment temperature is lower than 3 DEG C) less than second threshold (for example, less than 60 DEG C), environment temperature
And there are storage heater capacity to be less than capacity threshold lower limit (for example, current storage heater capacity < 50% storage heater total capacity), then method
Go to step 3.
Then, in step 3, return to the refrigerant for flowing through battery system in storage heater, to store heat.Then, method
Proceed to step 6, in step 6, judge whether storage heater capacity is higher than the capacity threshold upper limit, if storage heater capacity is higher than capacity
Upper threshold (for example, current storage heater capacity > 95% storage heater total capacity), then method proceeds to step 4.If storage heater is small
In capacity threshold lower limit, then continue accumulation of heat, until storage heater capacity is higher than the capacity threshold upper limit.
If the temperature of present battery system be higher than first threshold (for example, be higher than 50 DEG C) and be less than second threshold (for example,
Less than 60 DEG C), environment temperature is lower than low temperature environment threshold value (for example, environment temperature be lower than 3 DEG C) but storage heater capacity is higher than and holds
Upper threshold (for example, current storage heater capacity > 95% storage heater total capacity) is measured, then method goes to step 4.In step 4, so that
The refrigerant of battery system is flowed through by one in radiator or refrigerator, to cool down to refrigerant, to make electricity
Cell system temperature slowly reduces.Until battery pack temperature is lower than threshold value, method terminates at this time.
If current battery temperature is higher than second threshold (for example, being greater than 60 DEG C), method goes to step 5, in step
5, so that the refrigerant for flowing through battery pack passes through both radiator and refrigerator, so that the rapid drop in temperature of battery pack is to normally
Operating temperature range (for example, 10 DEG C -50 DEG C).
If the temperature of present battery system is lower than third threshold value (for example, being lower than 5 DEG C) but being greater than allows battery pack to work
Limiting temperature (for example, 0 DEG C), environment temperature lower than low temperature environment threshold value (for example, environment temperature be lower than 3 DEG C), then method turns
To step 6.
In step 6, method determines that electric vehicle continues whether running time will be more than first time threshold (for example, 20
Minute), if it is, executing bypass circulation.If not, thening follow the steps 7, in step 7, the current accumulation of heat for detecting storage heater is held
Amount, to determine whether storage heater has sufficient available heat (current storage heater capacity > 50% storage heater total capacity), if there is
Sufficient available heat, then method proceeds to step 8, in step 8, method using the heat in storage heater come to battery system into
Row heating.
If not having enough heats (current storage heater capacity < 50% storage heater total capacity) in storage heater, method is carried out
To step 9, battery system can be heated using the heater in storage heater or using other heating devices in step 9,
So that battery pack quickly recovers to optimum working temperature.The time that will be travelled can be inquired to driver by man-machine interface.Such as
The temperature of fruit battery pack is less than first threshold and is greater than third threshold value, thens follow the steps 10, refrigerant is made only to cycle through battery
Group, and keep the Current Temperatures of battery pack.
In addition, the method also can be performed when starting vehicle originally or charging to battery system.For example, working as vehicle
Battery system temperature lower than third threshold value (for example, be lower than 5 DEG C), environment temperature lower than low temperature environment threshold value (for example, ring
Border temperature be lower than 3 DEG C) in the case where start or carry out charging operations when, method goes to step 7.In step 7, storage heater is detected
Current regenerative capacity, to determine whether there is sufficient available heat by storage heater (current storage heater capacity > 50% storage heater always holds
Amount), if there is sufficient available heat, then method proceeds to step 8, in step 8, method using the heat in storage heater come
Battery system is heated.If not having enough heats in storage heater, (current storage heater capacity < 50% storage heater always holds
Amount), then method proceeds to step 9, step 9 can be using the heater in storage heater or using other heating devices come to battery
System is heated, so that battery pack quickly recovers to optimum working temperature.
In addition, additional detection can be carried out when will stop for a long time at low ambient temperatures the present disclosure additionally applies for vehicle
And the method that accumulation of heat is carried out to storage heater in advance.Specifically, it is lower than low temperature environment threshold value (for example, environment temperature in environment temperature
Lower than 3 DEG C) and storage heater capacity lower than in the case where the capacity threshold upper limit, vehicle is by inquiring that driver determines vehicle general
Wanting run down time is more than second time threshold (for example, 6 hours), then by recycling refrigerant in storage heater circuit,
And the refrigerant for being heated storage heater using flowing through battery pack carries out accumulation of heat, until storage heater capacity reaches capacity threshold
It is more than the upper limit.
When vehicle for a long time stop after restarting when, battery pack is heated using the heat in storage heater,
It solves the problems, such as to be heated using the electric power of battery pack itself in conventional method and cause degradation of cell performance, is conducive to mention
The durability of high battery.
Claims (5)
1. a kind of method of Vehicular battery group hold over system, which is characterized in that the hold over system include: battery pack, storage heater,
Radiator, refrigerator, temperature sensor, refrigerant and refrigerant tubing；
The refrigerant tubing is for being connected to battery pack, storage heater, radiator and refrigerator, and refrigerant is in the refrigerant
Pipeline internal circulation flow；Connection between the refrigerator and radiator is to be connected in parallel, storage heater and battery pack and refrigerator
Connection between radiator is to be connected in series；
The connection of the hold over system include four circuits, be respectively as follows: storage heater circuit, chiller circuit, radiator loop with
And bypass circulation；Wherein, storage heater circuit is sequentially connected battery pack and storage heater by refrigerant tubing, for storing storage heater
Heat heats battery pack；Chiller circuit, which is passed through, is sequentially connected battery pack and refrigerator by refrigerant tubing, for making battery
Group cooling；Radiator loop is sequentially connected battery pack and radiator by refrigerant tubing, for making battery pack radiate；It bypasses back
It only include battery pack in road, for making battery pack keep the present situation；
The temperature sensor is separately mounted in the refrigerant tubing at the inlet side and outlet side of battery pack, to measure respectively
Temperature T1 of the refrigerant before flowing into battery pack and flow out battery pack refrigerant temperature T2, thus according to T1 and T2 it
Poor T judges battery pack temperature；
During the method for the Vehicular battery group hold over system includes the following steps:
S1. first threshold, second threshold, third threshold value, low temperature limit temperature and storage heater capacity threshold lower limit and storage are set
The hot device capacity threshold upper limit, wherein then second threshold > first threshold > third threshold value > low temperature limit temperature is passed according to temperature
The measurement result of sensor determines battery pack temperature, and judges battery pack temperature and the first threshold, second threshold, third
The relationship of threshold value and low temperature limit temperature,
S2. the current capacities of storage heater are detected, so that judging whether storage heater has can regenerative capacity, wherein when storage heater holds
When amount is lower than storage heater capacity threshold lower limit, showing to have can regenerative capacity；
When battery pack temperature is greater than first threshold and is less than second threshold, and storage heater capacity is lower than capacity threshold lower limit,
Execute step S4；
When battery pack temperature is greater than first threshold and is less than second threshold, and storage heater capacity is higher than the capacity threshold upper limit,
S6 is executed, is cooled so that flowing to heat rejector refrigerant, so that making the temperature of battery pack after flowing through battery pack reduces；
When battery pack temperature is greater than second threshold, S6 and S7 is executed, so that by the refrigerant of heating after flowing through battery pack
It flows through refrigerator and radiator and reduces the temperature of refrigerant, so that the temperature of battery pack be made to reduce rapidly；
When battery pack temperature is less than first threshold and is greater than third threshold value, S8 is executed；
When battery pack temperature is less than third threshold value and is greater than low temperature limit temperature, S3 is executed；
S3. first time threshold is set, by the interactive interface between vehicle and user, when requesting vehicle that will run to user
Between, thus judge vehicle will continuous service time, and determine continuous working period and first time threshold relationship；If
Continuous working period is greater than first time threshold, then executes S8；If the continuous working period is less than first time threshold, execute
S5；
S4. by recycling refrigerant in storage heater circuit, and the system for being heated storage heater using flowing through battery pack
Cryogen carries out accumulation of heat；
S5. by recycling refrigerant in storage heater circuit, the refrigerant in storage heater circuit is added using storage heater
Heat, and the refrigerant of heating is made to flow through battery pack, to be heated to battery pack；
S6. by recycling refrigerant in radiator loop, so that the cooled refrigerant for flowing through radiator flows through battery
Group, and reduce battery pack temperature；
S7. by making to recycle in chiller circuit, so that the cooled refrigerant for flowing through refrigerator flows through battery pack, and make
Battery pack temperature reduces rapidly；
S8. by recycling refrigerant in bypass circulation, and the Current Temperatures of battery pack are kept.
2. the method for Vehicular battery group hold over system according to claim 1, which is characterized in that the method also includes:
While executing step S1, current environmental temperature is also detected.
3. the method for Vehicular battery group hold over system according to claim 2, which is characterized in that the method also includes:
If detecting current environmental temperature lower than low temperature environment threshold value in step S1, and battery pack temperature is less than third threshold value and big
When low temperature limit temperature, S5 is executed.
4. the method for Vehicular battery group hold over system according to claim 2, which is characterized in that the method also includes:
Second time threshold is set, wherein the second time threshold is greater than first time threshold, works as front ring when detecting in step S1
When border temperature is lower than low temperature environment threshold value, if big by the time that the vehicle that the interactive interface is requested to user will stop
In second time threshold, then S4 is executed, until storage heater capacity is higher than the capacity threshold upper limit.
5. the method for Vehicular battery group hold over system described in -4 according to claim 1, which is characterized in that carry out step S1 it
Preceding first measurement T and battery pack temperature T, determines empirical a, so that T × a=T, to judge battery in the next steps
When group temperature T, T × a is directlyed adopt to be judged.
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