CN106785237A - A kind of power battery thermal management method and system - Google Patents
A kind of power battery thermal management method and system Download PDFInfo
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- CN106785237A CN106785237A CN201611082940.5A CN201611082940A CN106785237A CN 106785237 A CN106785237 A CN 106785237A CN 201611082940 A CN201611082940 A CN 201611082940A CN 106785237 A CN106785237 A CN 106785237A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
Abstract
The present invention discloses a kind of power battery thermal management method and system, is applied to the charging process or discharge process of battery bag, comprises the following steps：In battery bag discharge process, the Current Temperatures of each cell in real-time detection battery bag, and the current temperature rise rate of each cell is calculated in real time；If the highest Current Temperatures of cell enter radiating mode and open radiating when exceeding the current temperature rise rate of highest of default first temperature threshold and cell more than default temperature rise threshold value；Under radiating mode, if the highest Current Temperatures of cell are less than default second temperature threshold value, stop radiating；Radiating is reopened if the highest Current Temperatures of cell are higher than the 3rd temperature threshold.The present invention can also control being turned on and off for radiating module so that battery bag is maintained in a metastable temperature range under battery bag discharge mode according to the temperature rise rate of cell, improve the security of battery bag.
Description
Technical field
The present invention relates to electrokinetic cell field of heat management, more particularly to a kind of power battery thermal management method and system.
Background technology
Under the advocating of green energy resource, electrokinetic cell is originated as the major impetus of New-energy electric vehicle, in vehicle system
Irreplaceable effect is played in system, it is increasingly welcomed by the general public.At the same time, how battery bag is ensured to greatest extent
More efficiently use as focus of concern.
Battery in battery bag needs to carry out certain heating.Such as, when battery is charged, it is necessary to each electricity
Pond carries out temperature detection.If the temperature of battery is too low, battery will have no idea to be full of, because the height of the capacity of battery and temperature
It is low to have certain relation.Battery by normal temperature be 25 degree calculate, when temperature often declines 1 degree, with respect to battery capacity about
Decline 0.8%；Battery capacity can also be recovered therewith after temperature is raised.If the situation of winter makes outdoor environment is more severe
Words, the capacity to battery has a certain impact.
Meanwhile, the battery in battery bag is also required to carry out certain radiating.Such as, charge or discharge is carried out in battery
When, temperature can not be too high., it is necessary to be radiated to battery after temperature reaches certain threshold value；By after radiating, temperature
After being reduced to certain threshold value, just stop radiating.Although the process can be controlled to the temperature of battery, lack to battery temperature
Spend the judgement of ascendant trend.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art, there is provided a kind of power battery thermal management method and be
System.
The purpose of the present invention is achieved through the following technical solutions：
A kind of power battery thermal management method, is applied to the charging process or discharge process of battery bag, including following step
Suddenly：
In battery bag discharge process, the Current Temperatures of each cell in real-time detection battery bag, and calculate in real time each
The current temperature rise rate of cell；
If the highest Current Temperatures of cell exceed default first temperature threshold and the highest of cell is currently warm
Rise and enter when speed exceedes default temperature rise threshold value radiating mode and open radiating；
Under radiating mode, if the highest Current Temperatures of cell are less than default second temperature threshold value, stop dissipating
Heat；Radiating is reopened if the highest Current Temperatures of cell are higher than the 3rd temperature threshold.
Used as further preferred scheme, it is right also to include after the Current Temperatures of each cell in the real-time detection battery bag
The Current Temperatures of each cell carry out Effective judgement, and the step of reject invalid temperature value, it is described to each cell
The step of temperature carries out Effective judgement is specially：If the Current Temperatures of cell exceed default 4th temperature threshold,
Judge that the temperature value is invalid.
Used as further preferred scheme, under radiating mode, the process to battery bag radiating is also included according to monomer electricity
The step of maximum temperature adjustment heat radiation power in pond, the process for adjusting heat radiation power according to the maximum temperature of cell is such as
Under：Radiating module carries out total power radiating, otherwise radiating module if the maximum temperature of cell is more than the 5th temperature threshold
Carry out half-power radiating.
As further preferred scheme, enter on discharge mode and battery bag high pressure after electricity in battery bag, real-time detection
The Current Temperatures of each cell；If the minimum Current Temperatures of cell are less than the 6th temperature threshold, enter electric discharge and heat
Pattern；
Under the heating mode that discharges, if the minimum Current Temperatures of cell exit electric discharge more than the 7th temperature threshold
Heating mode.
Used as further preferred scheme, under the heating mode that discharges, the fault detect also including the heating circuit that discharges is walked
Suddenly：
The electric current of real-time detection electric discharge heating circuit, if the electric current of the heating circuit that discharged after the first preset time period is zero
Or more than default first current threshold, then judge electric discharge heating circuit failure, and failure is reported；And/or
Into electric discharge heating mode after, if after the second preset time period the minimum Current Temperatures of cell be still below it is pre-
If the 7th temperature threshold, then judge electric discharge heating circuit failure, and failure is reported.
It is further comprising the steps of before battery bag enters charge mode as further preferred scheme：
The Current Temperatures of each cell of battery bag are detected, if the minimum Current Temperatures of cell are less than the default 8th
When temperature threshold and cell highest Current Temperatures are less than default nine temperature threshold, into charging heating pattern；
Under charging heating pattern, the Current Temperatures of each cell of real-time detection, if the minimum current temperature of cell
Degree exceedes default 11st temperature threshold more than the highest Current Temperatures of default tenth temperature threshold or cell, then move back
Go out charging heating pattern and enter charge mode.
As further preferred scheme, under charging heating pattern, the fault detect step also including charging heating loop
Suddenly：
The electric current in real-time detection charging heating loop, if the electric current in charging heating loop is zero after the 3rd preset time period
Or more than default second current threshold, then judge charging heating loop fault, and failure is reported；And/or
Into after charging heating pattern, if after the 4th preset time period the minimum Current Temperatures of cell be still below it is pre-
If the 8th temperature threshold, then judge charging heating loop fault, and failure is reported.
The present invention provides a kind of power battery thermal management method, it is possible to achieve in discharge process, according to cell
Highest Current Temperatures and the current temperature rise rate of highest control whether to enter radiating mode so that the temperature control of cell exists
In certain scope, the security that battery bag is improved because of the too high adverse effect to cell of temperature is reduced.
The present invention also provides a kind of power battery thermal management system, and it includes：
Temperature detecting unit, the Current Temperatures of each cell in real-time detection battery bag；
Temperature treating units, the Current Temperatures to each cell carry out Effective judgement, and reject invalid temperature value；
Temperature rise rate computing unit, each list is calculated according to the Current Temperatures for rejecting each cell after invalid temperature value
The current temperature rise rate of body battery；
Radiating control unit, according to Current Temperatures, each cell of rejecting each cell after invalid temperature value
Current temperature rise rate control radiating module working condition；
Radiating module, the control instruction according to radiating control unit is operated accordingly.
Used as further preferred scheme, the power battery thermal management system also includes：
Heat control unit, according to the Current Temperatures control heating module for rejecting the cell after invalid temperature value
Work；
Heating module, the control instruction according to heat control unit is operated accordingly.
Used as further preferred scheme, the power battery thermal management system also includes：
First current detecting unit, the electric current of real-time detection electric discharge heating circuit under the heating mode that discharges；
Second current detecting unit, the electric current in real-time detection charging heating loop under charging heating pattern；
Failure diagnosis unit, discharge heating mode under according to electric discharge heating circuit electric current and/or according to reject it is invalid
Temperature value after cell Current Temperatures, judge electric discharge heating circuit whether failure, and by fault information reporting；Filling
Electric current under electrical heating pattern according to charging heating loop and/or according to the current of the cell rejected after invalid temperature value
Temperature, judge charging heating loop whether failure, and by fault information reporting；
The radiating control unit, heat control unit, failure diagnosis unit are arranged in control centre.
Compared with prior art, beneficial effects of the present invention are：
1st, the present invention be a kind of power battery thermal management method and system, can be in the relatively low situation of the temperature of cell
Under heated；And in battery bag discharge process, can also be according to the Current Temperatures of each cell and the temperature of cell
Rise whether speed control radiating module opens radiating；Finally so that battery bag is maintained in a metastable temperature range,
Cell in protection battery bag, and improve the security of battery bag.
2nd, power battery thermal management system of the invention also include the first current detecting unit, the second current detecting unit and
Failure diagnosis unit, can monitor the real-time current of heating circuit under charging heating pattern or electric discharge heating mode, when without detection
To heating circuit electric current when, then there is heating circuit failure, and reporting fault information, improve the security of system.
3rd, the failure diagnosis unit of power battery thermal management system of the invention, can be with the temperature of real-time detection cell
Degree, according to the Current Temperatures for rejecting the cell after invalid temperature value, judges charging heating loop or electric discharge heating circuit
Whether failure, when the temperature of cell cannot rise, then it is assumed that occur in that heating circuit failure, and reporting fault information, enter
One step improves the security of system.
4th, power battery thermal management system of the invention, under charging heating pattern, the electric current in charging heating loop does not flow
The first current detecting unit is crossed, therefore the electricity of battery bag will not be counted and calculated.
5th, power battery thermal management method of the invention, under radiating mode, radiating module can be according to cell most
Whether high-temperature carries out total power radiating or half-power radiating, and then improve radiating efficiency more than the 5th temperature threshold, in monomer
Radiating of the radiating module to battery bag can be accelerated using total power radiating when the maximum temperature of battery is too high so that battery bag
Temperature is in controllable scope, it is to avoid because the temperature of cell is too high.
6th, power electric thermal management algorithm of the invention, the also Current Temperatures of real-time monitoring cell, reject cell
Ineffective temperature value of the middle temperature more than the 4th temperature threshold, it is ensured that cell temperature validity, so that it is guaranteed that battery bag temperature
The degree of accuracy of control, further improves the heat management efficiency of electrokinetic cell.
7th, power heat pipe reason method of the invention, the temperature real-time adjustment heat radiation power of the cell according to battery bag,
The temperature of cell is effectively reduced, and efficiently controls heat radiation power, rationally using the resource of itself to cell
Radiated, it is to avoid cause the wasting of resources, improved the utilization rate of resource.
Brief description of the drawings
Fig. 1 is the flow chart of the control method of the electrokinetic cell heat management of the embodiment of the present invention；
Fig. 2 is the theory diagram of the power battery thermal management system of the embodiment of the present invention；
Fig. 3 is the circuit theory diagrams of the heating module of the embodiment of the present invention.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give better embodiment of the invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described implementation method.On the contrary, the purpose for providing these implementation methods is to make to understand more the disclosure
Plus it is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique implementation method to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article with belong to technical field of the invention
The implication that technical staff is generally understood that is identical.The term for being used in the description of the invention herein is intended merely to description tool
The purpose of the implementation method of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more
The arbitrary and all of combination of related Listed Items.
Embodiment one
Fig. 1 is referred to, a kind of power battery thermal management method 20 is applied to the charging process of battery bag or discharged
Journey, comprises the following steps：
Step S1, in battery bag discharge process, the Current Temperatures of each cell in real-time detection battery bag, and in real time
Calculate the current temperature rise rate of each cell.
Step S2, if the highest Current Temperatures of cell exceed the highest of default first temperature threshold and cell
Current temperature rise rate enters radiating mode and opens radiating when exceeding default temperature rise threshold value.Specifically, first temperature threshold
Value is preferably 28 DEG C~32 DEG C.From as a example by 30 DEG C in the present embodiment；The temperature rise threshold value is preferably 1 DEG C/min~3 DEG C/min.
From as a example by 2 DEG C/min in the present embodiment.
Step S3, under radiating mode, if the highest Current Temperatures of cell are less than default second temperature threshold value,
Stop radiating；The temperature of cell is likely to occur the situation of slow rising, if the highest Current Temperatures of cell are higher than the
Three temperature thresholds then reopen radiating, slow down the temperature rise rate of cell.Specifically, the second temperature threshold value is preferably
26 DEG C~30 DEG C.From as a example by 28 DEG C in the present embodiment；3rd temperature threshold is preferably 30 DEG C~40 DEG C.In the present embodiment
As a example by 35 DEG C.
It will be clear that also including to each monomer after the Current Temperatures of each cell in the real-time detection battery bag
The Current Temperatures of battery carry out Effective judgement, and the step of reject invalid temperature value, it is described that each cell temperature is entered
The step of row Effective judgement, is specially：If the Current Temperatures of cell exceed default 4th temperature threshold, judging should
Temperature value is invalid.Temperature improves cell temperature effective more than the ineffective temperature of the 4th temperature threshold in rejecting cell
Property, improve the efficiency of the Temperature Treatment of cell.Specifically, the 4th temperature threshold is preferably 180 DEG C~220 DEG C.This
From as a example by 200 DEG C in embodiment.
Under radiating mode, the process to battery bag radiating is also included according to the maximum temperature of cell adjustment radiating work(
The step of rate, the process according to the maximum temperature of cell adjustment heat radiation power is as follows：If the highest temperature of cell
More than the 5th temperature threshold, then radiating module carries out total power radiating to degree, and otherwise radiating module carries out half-power radiating.Specifically,
5th temperature threshold is preferably 35 DEG C~45 DEG C.From as a example by 40 DEG C in the present embodiment.After radiating module is opened, can be with root
According to the maximum temperature real-time adjustment radiating dynamics of cell；When the temperature of cell is higher than 40 DEG C, full work(can be carried out
Rate radiates；After the temperature of cell lowers, half-power radiating can be carried out, slow down radiating dynamics.According to battery bag
The temperature real-time adjustment heat radiation power of cell, is effectively reduced the temperature of cell, and efficiently control radiating work(
Rate, is rationally radiated using the resource of itself to cell, it is to avoid cause the wasting of resources, improves the utilization rate of resource.
It is noted that entering on discharge mode and battery bag high pressure after electricity in battery bag, each cell of real-time detection
Current Temperatures；If the minimum Current Temperatures of cell are less than the 6th temperature threshold, enter electric discharge heating mode；In electric discharge
Under heating mode, if the minimum Current Temperatures of cell exit electric discharge heating mode more than the 7th temperature threshold.Specifically
Ground, the 6th temperature threshold is preferably -2 DEG C~1 DEG C.From as a example by 0 DEG C in the present embodiment；7th temperature threshold is preferred
It is 2 DEG C~4 DEG C.From as a example by 2 DEG C in the present embodiment.The voltage exported using battery bag itself is heated.
Under the heating mode that discharges, also including the failure detection steps of the heating circuit that discharges：An implementation method wherein
In, the electric current of real-time detection electric discharge heating circuit, if the electric current of the heating circuit that discharged after the first preset time period is zero or super
Cross default first current threshold, meanwhile, if into electric discharge heating mode after, if the cell after the second preset time period
Minimum Current Temperatures be still below default 7th temperature threshold, then judge electric discharge heating circuit failure, and failure is reported.
In another embodiment, the electric current of real-time detection electric discharge heating circuit, if being put after the first preset time period
The electric current in electrical heating loop is zero or more than default first current threshold, then judge electric discharge heating circuit failure, and by failure
Report.
In further embodiment, if into electric discharge heating mode after, if after the second preset time period monomer electricity
The minimum Current Temperatures in pond are still below default 7th temperature threshold, then judge electric discharge heating circuit failure, and failure is reported.
It will be clear that first Preset Time is preferably 1s~3s.From as a example by 2s in the present embodiment；It is described
Second Preset Time is preferably 40min~80min.From as a example by 60min in the present embodiment.First current threshold is preferably
15A~25A.From as a example by 20A in the present embodiment；7th temperature threshold is preferably 2 DEG C~4 DEG C.2 are selected in the present embodiment
As a example by DEG C.Wherein, electric current is zero i.e. circuit breaker, the excessive i.e. short circuit of electric current.
It is further comprising the steps of before battery bag enters charge mode：The Current Temperatures of each cell of battery bag are detected,
If the minimum Current Temperatures of cell are less than default 8th temperature threshold and cell highest Current Temperatures are less than default
Nine temperature thresholds when, into charging heating pattern.Preferably, the 8th temperature threshold is preferably -2 DEG C~1 DEG C.This reality
Apply in example from as a example by 0 DEG C；9th temperature threshold is preferably 15 DEG C~25 DEG C.From as a example by 20 DEG C in the present embodiment.
Under charging heating pattern, the Current Temperatures of each cell of real-time detection, if the minimum current temperature of cell
Degree exceedes default 11st temperature threshold more than the highest Current Temperatures of default tenth temperature threshold or cell, then move back
Go out charging heating pattern and enter charge mode.Preferably, the tenth temperature threshold is 2 DEG C；11st temperature threshold
It is 20 DEG C.The high pressure exported using charger is heated.
Under charging heating pattern, also including the failure detection steps in charging heating loop：An implementation method wherein
In, the electric current in real-time detection charging heating loop, if the electric current in charging heating loop is zero or super after the 3rd preset time period
Default second current threshold is crossed, meanwhile, into after charging heating pattern, if cell is most after the 4th preset time period
Low Current Temperatures are still below default 8th temperature threshold, then judge charging heating loop fault, and failure is reported.
In another embodiment, the electric current in real-time detection charging heating loop, if being charged after the 3rd preset time period
The electric current of heating circuit is zero or more than default second current threshold, then judge charging heating loop fault, and by failure
Report.
In yet another embodiment, into after charging heating pattern, if cell is most after the 4th preset time period
Low Current Temperatures are still below default 8th temperature threshold, then judge charging heating loop fault, and failure is reported.
It will be clear that the 3rd Preset Time is preferably 1s~3s.From as a example by 2s in the present embodiment；It is described
4th Preset Time is preferably 40min~80min.From as a example by 60min in the present embodiment.Second current threshold is preferably
15A~25A.From as a example by 20A in the present embodiment；8th temperature threshold is preferably -2 DEG C~1 DEG C.Selected in the present embodiment
As a example by 0 DEG C.
The present invention provides a kind of power battery thermal management method, it is possible to achieve in discharge process, according to cell
Highest Current Temperatures and the current temperature rise rate of highest control whether to enter radiating mode so that the temperature control of cell exists
In certain scope, the security that battery bag is improved because of the too high adverse effect to cell of temperature is reduced.
Embodiment two
Fig. 2 is referred to, the present invention also provides a kind of power battery thermal management system 10, and it includes：Temperature detecting unit
110, the Current Temperatures of each cell in real-time detection battery bag.Temperature treating units 120, to the current temperature of each cell
Degree carries out Effective judgement, and rejects invalid temperature value.Temperature rise rate computing unit 130, according to the invalid temperature value of rejecting
The Current Temperatures of each cell afterwards calculate the current temperature rise rate of each cell.Radiating control unit 210, according to rejecting
The Current Temperatures of each cell after invalid temperature value, the current temperature rise rate of each cell control the work of radiating module
Make state.Radiating module 220, the control instruction according to radiating control unit is operated accordingly.
The power battery thermal management system also includes：Heat control unit 310, after invalid temperature value is rejected
The Current Temperatures of cell control the work of heating module；Heating module 320, the control instruction according to heat control unit is entered
The corresponding operation of row.
The power battery thermal management system also includes：First current detecting unit 410, under the heating mode that discharges in real time
The electric current of detection electric discharge heating circuit；Second current detecting unit 420, real-time detection charging heating is returned under charging heating pattern
The electric current on road, for the electric current of real-time detection heating circuit.First current detecting unit 410 is the first current sensor；
Second current detecting unit 420 is the second current sensor.
In electric discharge heating mode or under charging heating pattern, failure diagnosis unit 510 judges that electric discharge heating circuit is
No failure, and by fault information reporting；Wherein in an implementation method, according to electric discharge heating circuit electric current and according to rejecting
The Current Temperatures of the cell after invalid temperature value, judge electric discharge heating circuit whether failure, and by fault information reporting.
In another embodiment, according to the electric current of electric discharge heating circuit, the heating circuit that judges to discharge whether failure, and failure is believed
Breath is reported.In further embodiment, according to the Current Temperatures for rejecting the cell after invalid temperature value, electric discharge is judged
Heating circuit whether failure, and by fault information reporting.
The radiating control unit 210, heat control unit 310, failure diagnosis unit 510 are arranged on control centre 700
It is interior.
Fig. 3 is referred to, Fig. 3 is the circuit theory diagrams of the heating module of the embodiment of the present invention.In the circuit theory diagrams, bag
Include the battery bag 100 that multiple cells are constituted in series.For the heater heated to the battery bag 100
321.For detect the total current of battery bag and calculate battery electricity the first current sensor 410；For real-time detection plus
Second current detecting unit 420 of the electric current of hot loop.In the circuit theory diagrams, also including the first also contacts device 323,
Under charge mode, the upper electricity for controlling the charger.Second also contacts device 322, for controlling the heater 321
It is switched on or switched off.
First the 323, second heating of also contacts device is sequentially connected in series between total anode and total negative terminal of the battery bag 100 to connect
Tentaculum 322, the second current sensor 420, heater 321, the first current sensor 410.
Power battery thermal management system also includes the total positive relay of electric discharge and always negative relay；The battery bag 100 it is total
Anode is connected by the total positive relay of electric discharge with the load anode, and total negative terminal of the battery bag 100 is by always negative relay
It is connected with the load negative terminal.
Power battery thermal management system also includes charge relay and always negative relay；The charger anode is by described
Charge relay is connected with the common node of the first also contacts device 323 and the second also contacts device 322, the charger
Negative terminal is connected by the always negative relay with the common point of the heater 321 and total negative terminal of the battery bag 100.
The charge relay, the second also contacts device 322, the second current sense 420, heater 321 and always bear relay
Device composition charging heating loop；The first also contacts device 323, the second also contacts device 322, the second current sense 420, plus
The composition electric discharge heating circuit of 321 and first current sensor of hot device 410.
The course of work：
Before battery bag enters charge mode, temperature detecting unit detects the Current Temperatures of each cell of battery bag,
Temperature treating units reject invalid temperature value, if the minimum Current Temperatures of cell are less than default 8th temperature threshold
And cell highest Current Temperatures are when being less than default nine temperature threshold, closure charge relay, always negative relay and the
One also contacts device is charged, and starts charger.After 5s, the second also contacts device is closed, heated by after 2s, disconnecting first
Relay, battery bag enters charging heating pattern, and the high pressure exported using charger is heated.Specifically, the 8th temperature
Degree threshold value is preferably -2 DEG C~1 DEG C.From as a example by 0 DEG C in the present embodiment；9th temperature threshold is preferably 15 DEG C~25 DEG C.
From as a example by 20 DEG C in the present embodiment.
Under charging heating pattern, the Current Temperatures of each cell of temperature detecting unit real-time detection, if cell
Minimum Current Temperatures exceed the highest Current Temperatures of default tenth temperature threshold or cell and exceed the default 11st
Temperature threshold, then disconnect second and heat relay, exits charging heating pattern；And the first heating relay is connected, into charging
Pattern.Preferably, the tenth temperature threshold is 2 DEG C；11st temperature threshold is 20 DEG C.
Under charging heating pattern, also including the failure detection steps in charging heating loop：An implementation method wherein
In, the electric current in real-time detection charging heating loop, if the electric current in charging heating loop is zero or super after the 3rd preset time period
Default second current threshold is crossed, meanwhile, into after charging heating pattern, if cell is most after the 4th preset time period
Low Current Temperatures are still below default 8th temperature threshold, then judge charging heating loop fault, and failure is reported.
In another embodiment, the electric current in real-time detection charging heating loop, if being charged after the 3rd preset time period
The electric current of heating circuit is zero or more than default second current threshold, then judge charging heating loop fault, and by failure
Report.
In yet another embodiment, into after charging heating pattern, if cell is most after the 4th preset time period
Low Current Temperatures are still below default 8th temperature threshold, then judge charging heating loop fault, and failure is reported.Here
Illustrate, the 3rd Preset Time is preferably 1s~3s.From as a example by 2s in the present embodiment；4th Preset Time is excellent
Elect 40min~80min as.From as a example by 60min in the present embodiment.Second current threshold is preferably 15A~25A.This reality
Apply in example from as a example by 20A；8th temperature threshold is preferably -2 DEG C~1 DEG C.From as a example by 0 DEG C in the present embodiment.
Enter on discharge mode and battery bag high pressure after electricity in battery bag, each cell of temperature detecting unit real-time detection
Current Temperatures；If the minimum Current Temperatures of cell are less than the 6th temperature threshold, heat control unit control closure first
Also contacts device and the second also contacts device, battery bag enter electric discharge heating mode, and the voltage exported using battery bag itself is entered
Row heating.Under the heating mode that discharges, if the minimum Current Temperatures of cell are more than the 7th temperature threshold, disconnect first and add
Thermo-contact device and the second also contacts device, exit electric discharge heating mode, into discharge mode.Specifically, the 6th temperature threshold
Value is preferably -2 DEG C~1 DEG C.From as a example by 0 DEG C in the present embodiment；7th temperature threshold is preferably 2 DEG C~4 DEG C.This implementation
From as a example by 2 DEG C in example.
Under the heating mode that discharges, also including the failure detection steps of the heating circuit that discharges：An implementation method wherein
In, the electric current of real-time detection electric discharge heating circuit, if the electric current of the heating circuit that discharged after the first preset time period is zero or super
Cross default first current threshold, meanwhile, if into electric discharge heating mode after, if the cell after the second preset time period
Minimum Current Temperatures be still below default 7th temperature threshold, then judge electric discharge heating circuit failure, and failure is reported.
In another embodiment, the electric current of real-time detection electric discharge heating circuit, if being put after the first preset time period
The electric current in electrical heating loop is zero or more than default first current threshold, then judge electric discharge heating circuit failure, and by failure
Report.
In further embodiment, if into electric discharge heating mode after, if after the second preset time period monomer electricity
The minimum Current Temperatures in pond are still below default 7th temperature threshold, then judge electric discharge heating circuit failure, and failure is reported.
It will be clear that first Preset Time is preferably 1s~3s.From as a example by 2s in the present embodiment；It is described
Second Preset Time is preferably 40min~80min.From as a example by 60min in the present embodiment.First current threshold is preferably
15A~25A.From as a example by 20A in the present embodiment；7th temperature threshold is preferably 2 DEG C~4 DEG C.2 are selected in the present embodiment
As a example by DEG C.Wherein, electric current is zero i.e. circuit breaker, the excessive i.e. short circuit of electric current.
In battery bag discharge process, the Current Temperatures of each cell in temperature detecting unit real-time detection battery bag,
Also, temperature rise rate computing unit calculates the current temperature rise rate of each cell in real time.If the highest of cell is currently warm
When degree exceedes default temperature rise threshold value more than the current temperature rise rate of highest of default first temperature threshold and cell, radiating
Control unit is controlled into radiating mode and opens radiating.Specifically, first temperature threshold is preferably 28 DEG C~32 DEG C.This
From as a example by 30 DEG C in embodiment；The temperature rise threshold value is preferably 1 DEG C/min~3 DEG C/min.2 DEG C/min is selected in the present embodiment
As a example by.Under radiating mode, if the highest Current Temperatures of cell are less than default second temperature threshold value, stop radiating.
The temperature of cell is likely to occur the situation of slow rising, if temperature detecting unit real-time detection is worked as to the highest of cell
Preceding temperature then reopens radiating higher than the 3rd temperature threshold, slows down the temperature rise rate of cell.Specifically, second temperature
Degree threshold value is preferably 26 DEG C~30 DEG C.From as a example by 28 DEG C in the present embodiment；3rd temperature threshold is preferably 30 DEG C~40
℃.From as a example by 35 DEG C in the present embodiment.
It will be clear that also include after the Current Temperatures of each cell in the real-time detection battery bag, at temperature
Reason unit carries out Effective judgement to the Current Temperatures of each cell, and rejects invalid temperature value, specially：If monomer is electric
The Current Temperatures in pond exceed default 4th temperature threshold, then temperature treating units judge that the temperature value is invalid.Reject monomer electricity
Temperature improves cell temperature validity more than the ineffective temperature of the 4th temperature threshold in pond, improves the temperature of cell
The efficiency for the treatment of.Specifically, the 4th temperature threshold is preferably 180 DEG C~220 DEG C.From as a example by 200 DEG C in the present embodiment.
Under radiating mode, the process to battery bag radiating is also included according to the maximum temperature of cell adjustment radiating work(
Rate, the process according to the maximum temperature of cell adjustment heat radiation power is as follows：If the maximum temperature of cell exceedes
Then radiating control unit control radiating module carries out total power radiating, otherwise radiating control unit control radiating to 5th temperature threshold
Module carries out half-power radiating.Specifically, the 5th temperature threshold is preferably 35 DEG C~45 DEG C.40 DEG C are selected in the present embodiment
As a example by.After radiating module is opened, can be according to the maximum temperature real-time adjustment of cell radiating dynamics；When the temperature of cell
When degree is higher than 40 DEG C, total power radiating can be carried out；After the temperature of cell lowers, half-power radiating can be carried out,
Slow down radiating dynamics.
The above implementation method only expresses several embodiments of the invention, and its description is more specific and detailed, but
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for the ordinary skill people of this area
For member, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to of the invention
Protection domain.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of power battery thermal management method, is applied to the charging process or discharge process of battery bag, it is characterised in that bag
Include following steps：
In battery bag discharge process, the Current Temperatures of each cell in real-time detection battery bag, and each monomer is calculated in real time
The current temperature rise rate of battery；
If the highest Current Temperatures of cell exceed the current temperature rise speed of the highest of default first temperature threshold and cell
Enter radiating mode when rate exceedes default temperature rise threshold value and open radiating；
Under radiating mode, if the highest Current Temperatures of cell are less than default second temperature threshold value, stop radiating；If
The highest Current Temperatures of cell then reopen radiating higher than the 3rd temperature threshold.
2. power battery thermal management method according to claim 1, it is characterised in that each list in real-time detection battery bag
Also include carrying out Effective judgement to the Current Temperatures of each cell after the Current Temperatures of body battery, and reject invalid temperature
It is the step of value, described to be specially the step of carry out Effective judgement to each cell temperature：If the Current Temperatures of cell
More than default 4th temperature threshold, then judge that the temperature value is invalid.
3. power battery thermal management method according to claim 1, it is characterised in that under radiating mode, to battery bag
The process of radiating also include according to the maximum temperature of cell adjust heat radiation power the step of, it is described according to cell most
The process of high-temperature adjustment heat radiation power is as follows：Radiating module enters if the maximum temperature of cell is more than the 5th temperature threshold
Row total power radiates, and otherwise radiating module carries out half-power radiating.
4. power battery thermal management method according to claim 1, it is characterised in that battery bag enter discharge mode and
In battery bag high pressure after electricity, the Current Temperatures of each cell of real-time detection；If the minimum Current Temperatures of cell are less than the
Six temperature thresholds, then enter electric discharge heating mode；
Under the heating mode that discharges, if the minimum Current Temperatures of cell are more than the 7th temperature threshold, electric discharge heating is exited
Pattern.
5. power battery thermal management method according to claim 4, it is characterised in that under the heating mode that discharges, also wrap
Include the failure detection steps of electric discharge heating circuit：
The electric current of real-time detection electric discharge heating circuit, if the electric current of the heating circuit that discharged after the first preset time period is zero or super
Default first current threshold is crossed, then judges electric discharge heating circuit failure, and failure is reported；And/or
Into electric discharge heating mode after, if after the second preset time period the minimum Current Temperatures of cell be still below it is default
7th temperature threshold, then judge electric discharge heating circuit failure, and failure is reported.
6. power battery thermal management method according to claim 1, it is characterised in that enter charge mode in battery bag
Before, it is further comprising the steps of：
The Current Temperatures of each cell of battery bag are detected, if the minimum Current Temperatures of cell are less than default 8th temperature
When threshold value and cell highest Current Temperatures are less than default nine temperature threshold, into charging heating pattern；
Under charging heating pattern, the Current Temperatures of each cell of real-time detection, if the minimum Current Temperatures of cell surpass
The highest Current Temperatures for crossing default tenth temperature threshold or cell exceed default 11st temperature threshold, then exit and fill
Electrical heating pattern simultaneously enters charge mode.
7. power battery thermal management method according to claim 6, it is characterised in that under charging heating pattern, also wrap
Include the failure detection steps in charging heating loop：
The electric current in real-time detection charging heating loop, if the electric current in charging heating loop is zero or super after the 3rd preset time period
Default second current threshold is crossed, then judges charging heating loop fault, and failure is reported；And/or
Into after charging heating pattern, if after the 4th preset time period the minimum Current Temperatures of cell be still below it is default
8th temperature threshold, then judge charging heating loop fault, and failure is reported.
8. a kind of power battery thermal management system, it is characterised in that including：
Temperature detecting unit (110), the Current Temperatures of each cell in real-time detection battery bag (100)；
Temperature treating units (120), the Current Temperatures to each cell carry out Effective judgement, and reject invalid temperature
Value；
Temperature rise rate computing unit (130), calculates each according to the Current Temperatures for rejecting each cell after invalid temperature value
The current temperature rise rate of cell；
Radiating module (220), the control instruction according to radiating control unit is operated accordingly；
Radiating control unit (210), according to Current Temperatures, each cell of rejecting each cell after invalid temperature value
Current temperature rise rate control radiating module (220) working condition.
9. power battery thermal management system according to claim 8, it is characterised in that the power battery thermal management system
Also include：
Heat control unit (310), heating module is controlled according to the Current Temperatures for rejecting the cell after invalid temperature value
Work；
Heating module (320), the control instruction according to heat control unit (310) is operated accordingly.
10. power battery thermal management system according to claim 9, it is characterised in that the electrokinetic cell heat management system
System also includes：
First current detecting unit (410), the electric current of real-time detection electric discharge heating circuit under the heating mode that discharges；
Second current detecting unit (420), the electric current in real-time detection charging heating loop under charging heating pattern；
Failure diagnosis unit (510), discharge heating mode under according to electric discharge heating circuit electric current and/or according to reject it is invalid
Temperature value after cell Current Temperatures, judge electric discharge heating circuit whether failure, and by fault information reporting；Filling
Electric current under electrical heating pattern according to charging heating loop and/or according to the current of the cell rejected after invalid temperature value
Temperature, judge charging heating loop whether failure, and by fault information reporting；
The radiating control unit (210), heat control unit (310), failure diagnosis unit (510) are arranged on control centre
(700) in.
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| CN109830782A (en) * | 2017-11-23 | 2019-05-31 | 郑州深澜动力科技有限公司 | A kind of batteries of electric automobile driving method for heating and controlling |
| CN110308393A (en) * | 2018-03-21 | 2019-10-08 | 宝沃汽车（中国）有限公司 | Fault detection method, device, battery pack and vehicle |
| CN110880628A (en) * | 2019-11-06 | 2020-03-13 | 东风航盛（武汉）汽车控制系统有限公司 | Battery temperature pretreatment and battery thermal management method based on temperature change rate |
| CN111430844A (en) * | 2020-03-05 | 2020-07-17 | 威睿电动汽车技术(宁波)有限公司 | Heat management method and device during battery pack charging and automobile |
| CN111483349A (en) * | 2020-04-27 | 2020-08-04 | 力高(山东)新能源技术有限公司 | Control method for thermal management of battery management system |
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| CN112928356A (en) * | 2021-02-23 | 2021-06-08 | 重庆大学 | Battery thermal management device and control method |
| CN113410537A (en) * | 2021-04-27 | 2021-09-17 | 浙江合众新能源汽车有限公司 | Power battery charging thermal management control method and system |
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| CN111483349A (en) * | 2020-04-27 | 2020-08-04 | 力高(山东)新能源技术有限公司 | Control method for thermal management of battery management system |
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| CN112895976A (en) * | 2021-02-01 | 2021-06-04 | 重庆峘能电动车科技有限公司 | Battery cell early warning protection method and system |
| CN112928356A (en) * | 2021-02-23 | 2021-06-08 | 重庆大学 | Battery thermal management device and control method |
| CN114614162A (en) * | 2021-03-29 | 2022-06-10 | 长城汽车股份有限公司 | Battery pack heating control method and device and vehicle |
| CN113410537A (en) * | 2021-04-27 | 2021-09-17 | 浙江合众新能源汽车有限公司 | Power battery charging thermal management control method and system |
| CN113410537B (en) * | 2021-04-27 | 2022-08-19 | 浙江合众新能源汽车有限公司 | Power battery charging thermal management control method and system |
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| CN113871750B (en) * | 2021-08-23 | 2023-03-28 | 上海融和智电新能源有限公司 | Vehicle-mounted energy system heat management method and system |
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