CN108501746A - Battery pack heating means, apparatus and system - Google Patents
Battery pack heating means, apparatus and system Download PDFInfo
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- CN108501746A CN108501746A CN201810274747.4A CN201810274747A CN108501746A CN 108501746 A CN108501746 A CN 108501746A CN 201810274747 A CN201810274747 A CN 201810274747A CN 108501746 A CN108501746 A CN 108501746A
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- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
-
- 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
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Automation & Control Theory (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of battery pack heating means, apparatus and system, which includes：When detecting vehicle after the power is turned on, the temperature value of current time battery pack is obtained；When the temperature value is less than low temperature threshold, the remaining capacity SOC of battery pack and the SOC of accumulator are obtained；According to the SOC of the SOC of battery pack and the accumulator, switch the conduction mode of bidirectional, dc converter, to control the charge and discharge process between battery pack and accumulator.In embodiments of the present invention, the switching of conduction mode is carried out by controlling bidirectional, dc converter, controls the process for carrying out charge and discharge between battery pack and accumulator, to be heated to battery pack, improves the temperature inside battery pack；Without increasing heating element, can be realized merely with existing charging-discharging structure, it is simple and practicable, it is at low cost, it disclosure satisfy that the use demand of the light mixing system startups of vehicle 48V BSG and power-assisted.
Description
Technical field
The present invention relates to Development of HEV Technology fields, more particularly, to a kind of battery pack heating means, device and are
System.
Background technology
Chinese law and regulations require to be increasingly stringenter to the oil consumption of passenger car, domestic main engine plants' state of the art and four stage mesh
There are still larger oil consumption gaps for mark；Suitable effective technology road is being sought in major automobile factory commercial city, and 48V systems are as a kind of low
Input, the technical solution of high repayment, are just received and are used by more and more main engine plants at present.The light mixing system phases of 48V
To traditional vehicle, due to introduce BSG (Belt Driven Starter Generator, belt-type start generator) motor,
48V power battery packs, direct current transducer (DCDC), realize driving mode diversification, have the start and stop of BSG motors, dynamic power-assisted,
Brake energy recovery slides a variety of driving functions of energy regenerating.
48V power battery packs are provided as the core energy storage parts in the light mixing systems of 48V BSG for 48V BSG systems
Stable energy source.Under low temperature use environment, 48V power battery packs are since own temperature is relatively low, activity inside battery pack
Species activity is decreased obviously, and internal resistance and polarization resistance increase, and charge-discharge electric power and capacity can be remarkably decreased, or even can cause electricity
The irreversible decaying of tankage, and bury security risk.The mode of heating of conventional batteries has electric heating film heating, PTC (Positive
Temperature Coefficient, posive temperature coefficient thermistor) it heats and liquid heat.Although these mode thermals efficiency are higher,
It is of high cost but there are complicated, the problems such as dismounting is inconvenient, difficult in maintenance；Due to 48V power battery packs, heating requirements do not have
The high-power strong battery request for mixing pure electric vehicle system is high, and cost control is stringenter, therefore existing heating means cannot
Meet the use demand of the light mixing system startups of vehicle 48V BSG and power-assisted.
Invention content
In view of this, the purpose of the present invention is to provide a kind of battery pack heating means, apparatus and systems, with by electricity
Chi Bao and accumulator carry out realizing the heating to battery pack during charge and discharge, simple and practicable, at low cost, disclosure satisfy that vehicle
The light mixing systems of 48V BSG start and the use demand of power-assisted.
In a first aspect, an embodiment of the present invention provides a kind of battery pack heating means, it is applied to electronic control unit ECU,
Including：
When detecting vehicle after the power is turned on, the temperature value of current time battery pack is obtained；
When the temperature value is less than low temperature threshold, the remaining capacity SOC of the battery pack and the SOC of accumulator are obtained；
According to the SOC of the SOC of the battery pack and the accumulator, switch the conduction mode of bidirectional, dc converter, with
Control the charge and discharge process between the battery pack and the accumulator.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein institute
The SOC of the SOC and the accumulator according to the battery pack are stated, the conduction mode of switching bidirectional, dc converter includes：
Judge whether to meet charge and discharge heating condition, wherein the charge and discharge heating condition is：The SOC of the battery pack is big
In the first HVT high voltage threshold, and the SOC of the accumulator is more than the first low pressure threshold；
If it is, according to the SOC of the SOC of the battery pack and the accumulator, switching bidirectional, dc converter is led
Logical pattern.
The possible embodiment of with reference to first aspect the first, an embodiment of the present invention provides second of first aspect
Possible embodiment, wherein the SOC of the SOC and the accumulator according to the battery pack, switching bidirectional, dc conversion
The conduction mode of device includes：
When the SOC of the battery pack is more than or equal to the second HVT high voltage threshold, the bidirectional, dc converter is controlled for the first time
The conduction mode of conducting is decompression mode, so that the battery pack is to the battery discharging；
When the SOC of the battery pack is more than or equal to the first HVT high voltage threshold and is less than the second HVT high voltage threshold, control described double
It is boost mode to the conduction mode of direct current transducer be connected for the first time, so that the accumulator charges for the battery pack；
Wherein, second HVT high voltage threshold is more than first HVT high voltage threshold, and the rated voltage of the battery pack is more than institute
State the rated voltage of accumulator.
Second of possible embodiment with reference to first aspect, an embodiment of the present invention provides the third of first aspect
Possible embodiment, wherein the conduction mode of the control bidirectional, dc converter be connected for the first time is decompression mode
Later, further include：
Step a1 when detecting that the SOC of the battery pack is less than or equal to boosting switching threshold, or works as the accumulator
SOC be more than or equal to the second low pressure threshold when, stop the decompression mode, control the conduction mode of the bidirectional, dc converter
For boost mode, so that the accumulator is battery pack charging；
Step a2 when detecting that the SOC of the battery pack is more than or equal to second HVT high voltage threshold, or works as the storage
When the SOC of battery is less than or equal to decompression switching threshold, stops the boost mode, control the conducting of the bidirectional, dc converter
Pattern is decompression mode, so that the battery pack is to the battery discharging；
Repeating said steps a1 and a2, until when the temperature value is more than or equal to the low temperature threshold, or ought be no longer
When meeting the charge and discharge heating condition, controls the bidirectional, dc converter and be in cut-off state, to stop the battery pack
Charge and discharge process between the accumulator；
Wherein, second low pressure threshold is more than first low pressure threshold；The boosting switching threshold is more than described the
One HVT high voltage threshold and it is less than second HVT high voltage threshold, the decompression switching threshold is more than first low pressure threshold and less than institute
State the second low pressure threshold.
Second of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 4th kind of first aspect
Possible embodiment, wherein the conduction mode of the control bidirectional, dc converter be connected for the first time is boost mode
Later, further include：
Step b1 when detecting that the SOC of the battery pack is more than or equal to second HVT high voltage threshold, or works as the storage
When the SOC of battery is less than or equal to decompression switching threshold, stops the boost mode, control the conducting of the bidirectional, dc converter
Pattern is decompression mode, so that the battery pack is to the battery discharging；
Step b2 when detecting that the SOC of the battery pack is less than or equal to boosting switching threshold, or works as the accumulator
SOC be more than or equal to the second low pressure threshold when, stop the decompression mode, control the conduction mode of the bidirectional, dc converter
For boost mode, so that the accumulator is battery pack charging；
Repeating said steps b1 and b2, until when the temperature value is more than or equal to the low temperature threshold, or ought be no longer
When meeting the charge and discharge heating condition, controls the bidirectional, dc converter and be in cut-off state, to stop the battery pack
Charge and discharge process between the accumulator；
Wherein, second low pressure threshold is more than first low pressure threshold；The boosting switching threshold is more than described the
One HVT high voltage threshold and it is less than second HVT high voltage threshold, the decompression switching threshold is more than first low pressure threshold and less than institute
State the second low pressure threshold.
Second aspect, the embodiment of the present invention also provide a kind of battery pack heating device, are applied to electronic control unit ECU,
Including：
Temperature acquisition module, for when detecting vehicle after the power is turned on, obtaining the temperature value of current time battery pack；
SOC acquisition modules, for when the temperature value is less than low temperature threshold, obtaining the remaining capacity of the battery pack
The SOC of SOC and accumulator；
Mode switch module, is used for the SOC of the SOC and the accumulator according to the battery pack, and switching bidirectional, dc turns
The conduction mode of parallel operation, to control the charge and discharge process between the battery pack and the accumulator.
In conjunction with second aspect, an embodiment of the present invention provides the first possible embodiments of second aspect, wherein institute
Mode switch module is stated to be additionally operable to：
Judge whether to meet charge and discharge heating condition, wherein the charge and discharge heating condition is：The SOC of the battery pack is big
In the first HVT high voltage threshold, and the SOC of the accumulator is more than the first low pressure threshold；
If it is, according to the SOC of the SOC of the battery pack and the accumulator, switching bidirectional, dc converter is led
Logical pattern.
In conjunction with the first possible embodiment of second aspect, an embodiment of the present invention provides second of second aspect
Possible embodiment, wherein the mode switch module is additionally operable to：
When the SOC of the battery pack is more than or equal to the second HVT high voltage threshold, the bidirectional, dc converter is controlled for the first time
The conduction mode of conducting is decompression mode, so that the battery pack is to the battery discharging；
When the SOC of the battery pack is more than or equal to the first HVT high voltage threshold and is less than the second HVT high voltage threshold, control described double
It is boost mode to the conduction mode of direct current transducer be connected for the first time, so that the accumulator charges for the battery pack；
Wherein, second HVT high voltage threshold is more than first HVT high voltage threshold, and the rated voltage of the battery pack is more than institute
State the rated voltage of accumulator.
The third aspect, the embodiment of the present invention also provide a kind of battery pack heating system, including battery pack, accumulator, two-way
Direct current transducer and ECU, the accumulator are connected with intelligent battery sensor IBS, the IBS for acquiring the accumulator
SOC；The ECU includes the battery pack heating device as described in second aspect and its any possible embodiment；
The IBS, the battery pack, the bidirectional, dc converter are connect with the ECU respectively, the battery pack and institute
Accumulator is stated to connect by the bidirectional, dc converter.
In conjunction with the third aspect, an embodiment of the present invention provides the first possible embodiments of the third aspect, wherein also
Including BSG motors, starter and load, the starter and load are connect with the bidirectional, dc converter, the BSG electricity
Machine is connect with the battery pack, the bidirectional, dc converter and the ECU respectively.
The embodiment of the present invention brings following advantageous effect：
Battery pack heating means provided in an embodiment of the present invention are applied to the electronic control unit ECU of hybrid vehicle,
Including：When detecting vehicle after the power is turned on, the temperature value of current time battery pack is obtained；When the temperature value is less than low temperature threshold,
Obtain the SOC of the remaining capacity SOC and accumulator of battery pack；According to the SOC of the SOC of battery pack and the accumulator, switching is double
To the conduction mode of direct current transducer, to control the charge and discharge process between battery pack and accumulator.In embodiments of the present invention,
The switching of conduction mode is carried out by controlling bidirectional, dc converter, controls the mistake that charge and discharge are carried out between battery pack and accumulator
Journey improves the temperature inside battery pack to be heated to battery pack；Without increasing heating element, filled merely with existing
Discharging structure can be realized, simple and practicable, at low cost, disclosure satisfy that the light mixing system startups of vehicle 48V BSG and the use of power-assisted
Demand.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of flow diagram of battery pack heating means provided in an embodiment of the present invention；
Fig. 2 is the flow diagram provided in an embodiment of the present invention into heating mode；
Fig. 3 is the flow diagram of another battery pack heating means provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of battery pack heating device provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of battery pack heating system provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another battery pack heating system provided in an embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
At present under low temperature use environment, 48V power battery packs are since own temperature is relatively low, active material inside battery pack
Activity is decreased obviously, and internal resistance and polarization resistance increase, and charge-discharge electric power and capacity can be remarkably decreased, and charging and discharging capabilities are poor, and
Existing technical solution cannot meet vehicle 48V BSG electric motor startings and the use need of power-assisted since complicated, cost is higher
It asks.Based on this, a kind of battery pack heating means provided in an embodiment of the present invention, apparatus and system, can by battery pack and
Accumulator carries out realizing the heating to battery pack during charge and discharge；Without increasing heating element, merely with existing charge and discharge
Electric structure can be realized, simple and practicable, at low cost, disclosure satisfy that the light mixing systems of vehicle 48V BSG start and the use of power-assisted needs
It asks.
Technology provided by the invention can be, but not limited in the low temperature power up applied to hybrid vehicle, for real
Now to the heating of battery pack, pass through relevant hardware or software realization.For ease of understanding the present embodiment, first to this
A kind of battery pack heating means disclosed in inventive embodiments describe in detail.
Fig. 1 shows a kind of flow diagram of battery pack heating means provided in an embodiment of the present invention.As shown in Figure 1,
The battery pack heating means are applied to electronic control unit ECU, including：
Step S101 obtains the temperature value of current time battery pack when detecting vehicle after the power is turned on.
In a possible embodiment, which includes at least battery management system BMS, and battery pack is sent by BMS
Temperature value and remaining capacity SOC (State of Charge).Specifically, the rated voltage of the battery pack can be, but not limited to for
48V。
Step S102 obtains the remaining capacity SOC and accumulator of battery pack when above-mentioned temperature value is less than low temperature threshold
SOC。
When ECU detects that the temperature value is less than low temperature threshold, determine that current temperature value is not easy to progress engine and opens
It is dynamic, it needs to carry out battery pack heating at this time.Further, the SOC of the remaining capacity SOC and accumulator of acquisition battery pack is needed.
Wherein the accumulator is connected with intelligent battery sensor IBS, the IBS and can be sent to the SOC, voltage and temperature of accumulator
ECU.In a possible embodiment, above-mentioned low temperature threshold can be, but not limited to -15 DEG C, the rated voltage of accumulator can with but it is unlimited
In 12V.
Step S103 switches the conduction mode of bidirectional, dc converter according to the SOC of the SOC of battery pack and accumulator, with
Control the charge and discharge process between battery pack and accumulator.
The conduction mode of wherein bidirectional, dc converter includes decompression mode and boost mode, which indicates electric current
Accumulator is flowed to from battery pack, i.e., from battery pack to battery discharging；The boost mode indicates that electric current flows to battery from accumulator
Packet charges to battery pack by accumulator.
In a possible embodiment, above-mentioned steps S103 includes：Judge whether to meet charge and discharge heating condition, wherein charge and discharge
Electrical heating condition is：The SOC of battery pack is more than the first HVT high voltage threshold, and the SOC of accumulator is more than the first low pressure threshold；If
It is, then according to the SOC of the SOC of battery pack and accumulator, to switch the conduction mode of bidirectional, dc converter.
Specifically, above-mentioned battery pack corresponding first is determined according to the optimal charge/discharge operation section of battery pack and accumulator
HVT high voltage threshold and corresponding first low pressure threshold of accumulator.In a possible embodiment, first HVT high voltage threshold can with but it is unlimited
In being 30%, the first low pressure threshold is respectively 30%.I.e. in the case where temperature value is less than low temperature threshold, if meeting above-mentioned the
The requirement of one HVT high voltage threshold and the first low pressure threshold, you can to carry out the charge and discharge process between accumulator and battery pack, to open
Open heating mode.
In practical applications, be referred to Fig. 2 shows the flow diagram into heating mode, into heating mode,
It specifically includes：
Step S201 obtains the relevant parameter of battery pack and accumulator.
Wherein above-mentioned relevant parameter includes at least the SOC of the temperature value of battery pack, SOC and accumulator.
Step S202, judges whether the temperature value of battery pack is less than low temperature threshold.
If so, thening follow the steps S203；If not, thening follow the steps S205.
Step S203, judges whether the SOC of battery pack is more than the first HVT high voltage threshold, and whether the SOC of accumulator is more than the
One low pressure threshold.
If so, thening follow the steps S204；If not, thening follow the steps S205.
Step S204 switches the conduction mode of bidirectional, dc converter, into heating mode.
Step S205 waits for driver command.
I.e. Current Temperatures be more than or equal to low temperature threshold, or cannot meet battery pack SOC be more than the first HVT high voltage threshold,
And the SOC of accumulator be more than the first low pressure threshold condition when, cannot enter heating mode, wait for driver command.
Battery pack heating means provided in an embodiment of the present invention are applied to the electronic control unit ECU of hybrid vehicle,
Including：When detecting vehicle after the power is turned on, the temperature value of current time battery pack is obtained；When the temperature value is less than low temperature threshold,
Obtain the SOC of the remaining capacity SOC and accumulator of battery pack；According to the SOC of the SOC of battery pack and the accumulator, switching is double
To the conduction mode of direct current transducer, to control the charge and discharge process between battery pack and accumulator.In embodiments of the present invention,
The switching of conduction mode is carried out by controlling bidirectional, dc converter, controls the mistake that charge and discharge are carried out between battery pack and accumulator
Journey improves the temperature inside battery pack to be heated to battery pack；Without increasing heating element, filled merely with existing
Discharging structure can be realized, simple and practicable, at low cost, disclosure satisfy that the light mixing system startups of vehicle 48V BSG and the use of power-assisted
Demand.
In a possible embodiment, in above-mentioned steps S103：According to the SOC of the SOC of battery pack and accumulator, switching is two-way
The conduction mode of direct current transducer, including following two situations：
The first situation：
When the SOC of battery pack be more than or equal to the second HVT high voltage threshold when, control bidirectional, dc converter be connected for the first time lead
Logical pattern is decompression mode, so that battery pack is to battery discharging.
Specifically, the SOC of battery pack can be expressed as HS, the first HVT high voltage threshold is expressed as HS1, second HVT high voltage threshold's table
It is shown as HS2, the SOC of accumulator is expressed as LS, the first low pressure threshold is expressed as LS1.Wherein HS1<HS2, HS1And HS2It can basis
The actual optimal charge/discharge operation section of battery pack is determined, and is not limited here；The H in a possible embodimentS1For
30%, HS2For 80%, LS1It is 30%.In addition, the rated voltage of battery pack is more than the rated voltage of accumulator.
The first above-mentioned situation, as in LS>LS1, and HS≥HS2In the case of, from battery pack to battery discharging.Into one
Step ground, after the conduction mode be connected for the first time is decompression mode, the above method further includes：
Step a1, when detecting that the SOC of battery pack is less than or equal to boosting switching threshold, or when the SOC of accumulator is big
When equal to the second low pressure threshold, stopping decompression mode, the conduction mode of control bidirectional, dc converter is boost mode, so that
Accumulator charges for battery pack.
Wherein, the first low pressure threshold is expressed as LS2, the second low pressure threshold is more than the first low pressure threshold, i.e. LS1<LS2, can
L in the embodiment of energyS2It is 80%.Boosting switching threshold is expressed as HSM, boosting switching threshold is more than the first HVT high voltage threshold and is less than
Second HVT high voltage threshold, i.e. HS1<HSM<HS2.In a possible embodiment, HSM=HS1+ 5%.
Specifically, to during battery discharging, the electricity of battery pack gradually decreases battery pack, the electricity of accumulator by
It is cumulative more.When detecting HS≤HSMWhen, or work as LS≥LS2When, ECU sends boosting switching command to bidirectional, dc converter, makes
The conduction mode for obtaining bidirectional, dc converter is boost mode, is charged so that accumulator is battery pack.
Step a2, when detecting that the SOC of battery pack is more than or equal to the second HVT high voltage threshold, or when the SOC of accumulator is small
When equal to decompression switching threshold, stopping boost mode, the conduction mode of control bidirectional, dc converter is decompression mode, so that
Battery pack is to battery discharging.
Wherein decompression switching threshold is expressed as LSM, the decompression switching threshold is more than the first low pressure threshold and is less than the second low pressure
Threshold value.That is LS1<LSM<LS2.In a possible embodiment, LSM=LS1+ 5%.
Specifically, in step a2, during accumulator is battery pack charging, the electricity of battery pack gradually increases, and stores
The electricity of battery gradually decreases, when detecting HS≥HS2When, or work as LS≤LSMWhen, ECU sends decompression switching command to two-way
Direct current transducer so that the conduction mode of bidirectional, dc converter is decompression mode, so that battery pack is to battery discharging.
Further, battery pack is to during battery discharging, and the electricity of battery pack gradually decreases again, the electricity of accumulator
Amount gradually increases again, is repeated in above-mentioned steps a1 and a2, until when above-mentioned temperature value is more than or equal to low temperature threshold, or work as
When no longer meeting charge and discharge heating condition, control bidirectional, dc converter is in cut-off state, to stop battery pack and accumulator
Between charge and discharge process.I.e. in controlling charge and discharge process, the SOC of temperature value and battery pack and accumulator is detected in real time, when
Detect temperature value T >=T0When, or when no longer meeting charge and discharge heating condition, exit heating mode.
The second situation：
When the SOC of battery pack is more than or equal to the first HVT high voltage threshold and is less than the second HVT high voltage threshold, control bidirectional, dc turns
The conduction mode of parallel operation be connected for the first time is boost mode, so that accumulator charges for battery pack.
Above-mentioned the second situation, as in LS>LS1, and HS1<HS<HS2In the case of, it is charged for battery pack by accumulator.Into
One step, after the conduction mode be connected for the first time is boost mode, the above method further includes：
Step b1, when detecting that the SOC of battery pack is more than or equal to the second HVT high voltage threshold, or when the SOC of accumulator is small
When equal to decompression switching threshold, stopping boost mode, the conduction mode of control bidirectional, dc converter is decompression mode, so that
Battery pack is to battery discharging.
Specifically, during accumulator is battery pack charging, the electricity of battery pack gradually increases, the electricity of accumulator by
It is decrescence few, when detecting HS≥HS2When, or work as LS≤LSMWhen, ECU sends decompression switching command to bidirectional, dc converter, makes
The conduction mode of bidirectional, dc converter is decompression mode so that battery pack is to battery discharging.
Step b2, when detecting that the SOC of battery pack is less than or equal to boosting switching threshold, or when the SOC of accumulator is big
When equal to the second low pressure threshold, stopping decompression mode, the conduction mode of control bidirectional, dc converter is boost mode, so that
Accumulator charges for the battery pack.
Specifically, to during battery discharging, the electricity of battery pack gradually decreases battery pack, the electricity of accumulator by
It is cumulative more.When detecting HS≤HSMWhen, or work as LS≥LS2When, ECU sends boosting switching command to bidirectional, dc converter, makes
The conduction mode for obtaining bidirectional, dc converter is boost mode, is charged so that accumulator is battery pack.
Further, during accumulator is battery pack charging, the electricity of battery pack gradually increases again, the electricity of accumulator
Amount gradually decreases again, is repeated in above-mentioned steps b1 and b2, until when above-mentioned temperature value is more than or equal to low temperature threshold, or work as
When no longer meeting charge and discharge heating condition, control bidirectional, dc converter is in cut-off state, to stop battery pack and accumulator
Between charge and discharge process.
Specifically, such as in the second situation, when executing step b1, the SOC for accumulator occur is low less than first
The case where pressing threshold value exits heating mode in determination.
Specifically, above-mentioned charge and discharge cycles process (i.e. heating mode) is as shown in figure 3, the cyclic process includes：
Whether step S301, the SOC for detecting battery pack are more than or equal to the second HVT high voltage threshold.
If so, executing step S302；If not, executing step S304.
The conduction mode of step S302, control bidirectional, dc converter are decompression mode.
Step S303, judge battery pack SOC whether be less than or equal to boosting switching threshold or accumulator SOC whether
More than or equal to the second low pressure threshold.
If so, thening follow the steps S304；If not, thening follow the steps S302.
The conduction mode of step S304, control bidirectional, dc converter are boost mode.
Step S305, judge the SOC of battery pack whether be more than or equal to the second HVT high voltage threshold or accumulator SOC whether
Less than or equal to decompression switching threshold.
If so, thening follow the steps S302；If not, thening follow the steps S304.
In above-mentioned cyclic process, when the temperature value of above-mentioned battery pack is more than or equal to low temperature threshold, or ought no longer it expire
When sufficient charge and discharge heating condition, control bidirectional, dc converter is in cut-off state, to stop between battery pack and accumulator
Charge and discharge process exits cycle shown in Fig. 3.
Further, a kind of structural representation of battery pack heating device provided in an embodiment of the present invention is shown referring to Fig. 4
Figure.As shown in figure 4, the battery pack heating device is applied to electronic control unit ECU, including：
Temperature acquisition module 11, for when detecting vehicle after the power is turned on, obtaining the temperature value of current time battery pack；
SOC acquisition modules 12, for when above-mentioned temperature value is less than low temperature threshold, obtaining the remaining capacity SOC of battery pack
With the SOC of accumulator；
Mode switch module 13 is used for the SOC of the SOC and the accumulator according to battery pack, switching bidirectional, dc conversion
The conduction mode of device, to control the charge and discharge process between battery pack and the accumulator.
Further, in above-mentioned battery pack heating device, mode switch module 13 is additionally operable to：
Judge whether to meet charge and discharge heating condition, wherein charge and discharge heating condition is：It is high that the SOC of battery pack is more than first
Threshold value is pressed, and the SOC of accumulator is more than the first low pressure threshold；
If so, according to the SOC of the SOC of battery pack and accumulator, switch the conduction mode of bidirectional, dc converter.
Further, in above-mentioned battery pack heating device, mode switch module 13 is additionally operable to：
When the SOC of battery pack be more than or equal to the second HVT high voltage threshold when, control bidirectional, dc converter be connected for the first time lead
Logical pattern is decompression mode, so that battery pack is to battery discharging；
When the SOC of battery pack is more than or equal to the first HVT high voltage threshold and is less than the second HVT high voltage threshold, control bidirectional, dc turns
The conduction mode of parallel operation be connected for the first time is boost mode, so that accumulator charges for battery pack；
Wherein, the second HVT high voltage threshold is more than the first HVT high voltage threshold, and the rated voltage of battery pack is more than the specified electricity of accumulator
Pressure.
Further, a kind of structural representation of battery pack heating system provided in an embodiment of the present invention is shown referring to Fig. 5
Figure.As shown in figure 5, the battery pack heating system, including battery pack 100, accumulator 200, bidirectional, dc converter 300 and ECU
400, accumulator is connected with intelligent battery sensor IBS 500, and IBS 500 is used to acquire the SOC of accumulator；ECU 400 includes
Battery pack heating device in above-described embodiment.
Wherein, IBS, battery pack, bidirectional, dc converter are connect with ECU respectively, and battery pack passes through two-way straight with accumulator
Stream transformer connects.Specifically, the rated voltage of battery pack is 48V, and the rated voltage of accumulator is 12V.ECU is total by CAN
Line is connect with battery pack, bidirectional, dc converter, and is controlled the battery pack and bidirectional, dc converter.Battery pack passes through
48V harness is connect with bidirectional, dc converter, which is connect by 12V harness with accumulator.
Specifically, in heating mode, shown in solid, boost mode pair in the corresponding current direction of decompression mode such as Fig. 5
The current direction answered is as shown in broken line in fig. 5.
Further, show that the structure of another battery pack heating system provided in an embodiment of the present invention is shown referring to Fig. 6
It is intended to.On the basis of battery pack heating system shown in Fig. 5, which further includes BSG motors 600, starter 700 and load
800, starter 700 and load 800 are connect with bidirectional, dc converter 300, BSG motors 600 respectively with battery pack 100, double
To direct current transducer 300 and the connections of ECU 400.
Specifically, the rated voltage of the starter be 12V, bidirectional, dc converter by 12V harness respectively with starter
It is connected with load；ECU is connect by CAN bus with BSG motors, and is controlled the BSG motors；Battery pack passes through 48V lines
Beam is connect with BSG motors, and electric energy is provided for the BSG motors.
Specifically, the corresponding execution program of above-mentioned battery pack heating means is loaded in above-mentioned ECU, you can pass through above-mentioned electricity
Pond packet heating system realizes the scheme in above-mentioned battery pack heating means.
In embodiments of the present invention, the switching of conduction mode is carried out by controlling bidirectional, dc converter, controls battery pack
The process that charge and discharge are carried out between accumulator improves the temperature inside battery pack to be heated to battery pack；Without increasing
Add heating element, can be realized merely with existing charging-discharging structure, it is simple and practicable, it is at low cost, it disclosure satisfy that vehicle 48V BSG
Light mixing system starts and the use demand of power-assisted.
Battery pack heating device provided in an embodiment of the present invention and system, the battery pack heating side provided with above-described embodiment
Method technical characteristic having the same reaches identical technique effect so can also solve identical technical problem.
The computer program product for the carry out battery pack heating means that the embodiment of the present invention is provided, including store processing
The computer readable storage medium of the executable non-volatile program code of device, the instruction that said program code includes can be used for holding
Method described in row previous methods embodiment, specific implementation can be found in embodiment of the method, and details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
And the specific work process of system, it can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
Flow chart and block diagram in attached drawing show multiple embodiment method and computer program products according to the present invention
Architecture, function and operation in the cards.In this regard, each box in flowchart or block diagram can represent one
A part for module, section or code, the part of the module, section or code include it is one or more for realizing
The executable instruction of defined logic function.It should also be noted that in some implementations as replacements, the work(marked in box
Can also can in a different order than that indicated in the drawings it occur.For example, two continuous boxes can essentially be substantially parallel
Ground executes, they can also be executed in the opposite order sometimes, this is depended on the functions involved.It is also noted that block diagram
And/or the combination of each box in flow chart and the box in block diagram and or flow chart, work(as defined in executing can be used
Can or the dedicated hardware based system of action realize, or can come using a combination of dedicated hardware and computer instructions real
It is existing.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.Unless specifically stated otherwise, the opposite step of the component and step that otherwise illustrate in these embodiments, digital table
It is not limit the scope of the invention up to formula and numerical value
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, in another example, multiple units or component can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be by some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in the executable non-volatile computer read/write memory medium of a processor.Based on this understanding, of the invention
Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the present invention
State all or part of step of method.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with
Store the medium of program code.
Finally it should be noted that：Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of battery pack heating means, which is characterized in that it is applied to electronic control unit ECU, including：
When detecting vehicle after the power is turned on, the temperature value of current time battery pack is obtained；
When the temperature value is less than low temperature threshold, the remaining capacity SOC of the battery pack and the SOC of accumulator are obtained；
According to the SOC of the SOC of the battery pack and the accumulator, switch the conduction mode of bidirectional, dc converter, with control
Charge and discharge process between the battery pack and the accumulator.
2. according to the method described in claim 1, it is characterized in that, the SOC according to the battery pack and the accumulator
SOC, switching bidirectional, dc converter conduction mode include：
Judge whether to meet charge and discharge heating condition, wherein the charge and discharge heating condition is：The SOC of the battery pack is more than the
One HVT high voltage threshold, and the SOC of the accumulator is more than the first low pressure threshold；
If it is, according to the SOC of the SOC of the battery pack and the accumulator, switch the conducting mould of bidirectional, dc converter
Formula.
3. according to the method described in claim 2, it is characterized in that, the SOC according to the battery pack and the accumulator
SOC, switching bidirectional, dc converter conduction mode include：
When the SOC of the battery pack is more than or equal to the second HVT high voltage threshold, the conducting for the first time of the bidirectional, dc converter is controlled
Conduction mode be decompression mode so that the battery pack is to the battery discharging；
When the SOC of the battery pack is more than or equal to the first HVT high voltage threshold and is less than the second HVT high voltage threshold, control is described two-way straight
The conduction mode of stream transformer be connected for the first time is boost mode, so that the accumulator charges for the battery pack；
Wherein, second HVT high voltage threshold is more than first HVT high voltage threshold, and the rated voltage of the battery pack is more than the storage
The rated voltage of battery.
4. according to the method described in claim 3, it is characterized in that, the conducting for the first time of the control bidirectional, dc converter
Conduction mode be decompression mode after, further include：
Step a1, when detecting that the SOC of the battery pack is less than or equal to boosting switching threshold, or when the accumulator
When SOC is more than or equal to the second low pressure threshold, stop the decompression mode, the conduction mode for controlling the bidirectional, dc converter is
Boost mode, so that the accumulator charges for the battery pack；
Step a2 when detecting that the SOC of the battery pack is more than or equal to second HVT high voltage threshold, or works as the accumulator
SOC be less than or equal to decompression switching threshold when, stop the boost mode, control the conduction mode of the bidirectional, dc converter
For decompression mode, so that the battery pack is to the battery discharging；
Repeating said steps a1 and a2, until when the temperature value is more than or equal to the low temperature threshold, or ought no longer meet
When the charge and discharge heating condition, controls the bidirectional, dc converter and be in cut-off state, to stop the battery pack and institute
State the charge and discharge process between accumulator；
Wherein, second low pressure threshold is more than first low pressure threshold；It is high that the boosting switching threshold is more than described first
It presses threshold value and is less than second HVT high voltage threshold, the decompression switching threshold is more than first low pressure threshold and is less than described the
Two low pressure thresholds.
5. according to the method described in claim 3, it is characterized in that, the conducting for the first time of the control bidirectional, dc converter
Conduction mode be boost mode after, further include：
Step b1 when detecting that the SOC of the battery pack is more than or equal to second HVT high voltage threshold, or works as the accumulator
SOC be less than or equal to decompression switching threshold when, stop the boost mode, control the conduction mode of the bidirectional, dc converter
For decompression mode, so that the battery pack is to the battery discharging；
Step b2, when detecting that the SOC of the battery pack is less than or equal to boosting switching threshold, or when the accumulator
When SOC is more than or equal to the second low pressure threshold, stop the decompression mode, the conduction mode for controlling the bidirectional, dc converter is
Boost mode, so that the accumulator charges for the battery pack；
Repeating said steps b1 and b2, until when the temperature value is more than or equal to the low temperature threshold, or ought no longer meet
When the charge and discharge heating condition, controls the bidirectional, dc converter and be in cut-off state, to stop the battery pack and institute
State the charge and discharge process between accumulator；
Wherein, second low pressure threshold is more than first low pressure threshold；It is high that the boosting switching threshold is more than described first
It presses threshold value and is less than second HVT high voltage threshold, the decompression switching threshold is more than first low pressure threshold and is less than described the
Two low pressure thresholds.
6. a kind of battery pack heating device, which is characterized in that it is applied to electronic control unit ECU, including：
Temperature acquisition module, for when detecting vehicle after the power is turned on, obtaining the temperature value of current time battery pack；
SOC acquisition modules, for when the temperature value be less than low temperature threshold when, obtain the battery pack remaining capacity SOC and
The SOC of accumulator；
Mode switch module is used for the SOC of the SOC and the accumulator according to the battery pack, switches bidirectional, dc converter
Conduction mode, to control the charge and discharge process between the battery pack and the accumulator.
7. device according to claim 6, which is characterized in that the mode switch module is additionally operable to：
Judge whether to meet charge and discharge heating condition, wherein the charge and discharge heating condition is：The SOC of the battery pack is more than the
One HVT high voltage threshold, and the SOC of the accumulator is more than the first low pressure threshold；
If it is, according to the SOC of the SOC of the battery pack and the accumulator, switch the conducting mould of bidirectional, dc converter
Formula.
8. device according to claim 7, which is characterized in that the mode switch module is additionally operable to：
When the SOC of the battery pack is more than or equal to the second HVT high voltage threshold, the conducting for the first time of the bidirectional, dc converter is controlled
Conduction mode be decompression mode so that the battery pack is to the battery discharging；
When the SOC of the battery pack is more than or equal to the first HVT high voltage threshold and is less than the second HVT high voltage threshold, control is described two-way straight
The conduction mode of stream transformer be connected for the first time is boost mode, so that the accumulator charges for the battery pack；
Wherein, second HVT high voltage threshold is more than first HVT high voltage threshold, and the rated voltage of the battery pack is more than the storage
The rated voltage of battery.
9. a kind of battery pack heating system, which is characterized in that including battery pack, accumulator, bidirectional, dc converter and ECU, institute
It states accumulator and is connected with the SOC of intelligent battery sensor IBS, the IBS for acquiring the accumulator；The ECU includes such as
Claim 6 to 8 any one of them battery pack heating device；
The IBS, the battery pack, the bidirectional, dc converter are connect with the ECU respectively, the battery pack and the storage
Battery is connected by the bidirectional, dc converter.
10. system according to claim 9, which is characterized in that further include BSG motors, starter and load, the starting
Machine and load are connect with the bidirectional, dc converter, and the BSG motors turn with the battery pack, the bidirectional, dc respectively
Parallel operation and ECU connections.
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| CN112721729B (en) * | 2020-12-29 | 2023-03-03 | 联合汽车电子有限公司 | Control method and control system of battery |
| CN112721729A (en) * | 2020-12-29 | 2021-04-30 | 联合汽车电子有限公司 | Control method and control system of battery |
| WO2024077707A1 (en) * | 2022-10-13 | 2024-04-18 | 深圳市正浩创新科技股份有限公司 | Battery pack, heating control method thereof, and electronic device |
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