CN108344948A - A kind of the temperature alarming method, apparatus and electric vehicle of batteries of electric automobile - Google Patents
A kind of the temperature alarming method, apparatus and electric vehicle of batteries of electric automobile Download PDFInfo
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- CN108344948A CN108344948A CN201810043322.2A CN201810043322A CN108344948A CN 108344948 A CN108344948 A CN 108344948A CN 201810043322 A CN201810043322 A CN 201810043322A CN 108344948 A CN108344948 A CN 108344948A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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Abstract
The invention discloses the temperature alarming method, apparatus and electric vehicle of a kind of batteries of electric automobile.Determine the positive electrode for the single battery for constituting batteries of electric automobile and the first temperature that electrolyte reacts; determine the negative material for the single battery for constituting the batteries of electric automobile and the second temperature that the electrolyte reacts; determine the smaller value in first temperature and the second temperature; battery protection temperature is set based on the smaller value, and will be in the storage to battery management system of battery protection temperature；The lug temperature at the single battery of the batteries of electric automobile is detected, the lug temperature is sent to the battery management system；When the battery management system judges that the lug temperature is more than the battery protection temperature, alarm is sent out.Embodiment of the present invention is started with from inside battery reaction obtains accurate cell reaction temperature, is detected in real time for battery management system and the battery runaway temperature that gives warning in advance, guarantee battery are safe to use.
Description
Technical field
The present invention relates to electric vehicle engineering field, more particularly to the temperature alarming method of a kind of batteries of electric automobile, dress
It sets and electric vehicle.
Background technology
National newest standards《The term and definition of automobile and trailer type》Have to automobile in (GB/T 3730.1-2001)
Such as give a definition：By power drive, the vehicle of the non-track carrying with 4 or 4 or more wheels is mainly used for：Carrying personnel
And (or) cargo；Draw the vehicle of carrying personnel and (or) cargo；Specific use.Electric vehicle disappears as a kind of reduction oil
The new-energy automobile of consumption, low stain, low noise, it is considered to be solve the important channel of energy crisis and environmental degradation.Mixing is dynamic
Power automobile takes into account the advantage of pure electric automobile and traditional combustion engine automobile simultaneously, is meeting vehicle dynamic quality requirement and continual mileage
Under the premise of it is required that, it is effectively improved fuel economy, reduces discharge, it is considered to be current energy saving and emission reduction effective road
One of diameter.
The cell safety problem of electric vehicle is after all battery heat production and heat dissipation problem, solves internal temperature of battery
Scheme is started with from battery quantity of heat production and increase battery heat dissipation capacity is reduced, and can be divided into Physical and chemical method.Physical includes making
With the methods of the equipment such as hot face material and fuse, optimization battery housing structure；Chemical method includes modification to motor material, electricity
Solve the electrode material that liquid is modified, searching is new.Chemical method is but to invent ideal green wood from inside battery solution to the problem
Material and new electrolyte are under test, still remote from practical application.
In the prior art, short-circuit protection is arranged by battery temperature method for sensing, detects the lug temperature at battery pole ear
Degree, and protect the comparison result of temperature to realize the protection to battery based on lug temperature and predetermined battery.Temperature and electricity at lug
Pond internal temperature is two concepts, and internal temperature of battery is usually slightly above lug temperature.It is based primarily upon empirical value at present and determines electricity
Protect temperature in pond.It is possible that when battery protection temperature does not reach also, and inside battery has overheated, so as to lead to battery not
Safety, reduces battery security.
Invention content
In view of this, the object of the present invention is to provide the temperature alarming method, apparatus of a kind of batteries of electric automobile and electronic
Automobile, to improve battery security.
A kind of temperature alarming method of batteries of electric automobile, including：
Determine the positive electrode for the single battery for constituting batteries of electric automobile and the first temperature that electrolyte reacts, really
Surely it constitutes the negative material of the single battery of the batteries of electric automobile and second temperature that the electrolyte reacts, determines
Battery protection temperature is arranged based on the smaller value in smaller value in first temperature and the second temperature, and will be described
In the storage to battery management system of battery protection temperature；
The lug temperature at the single battery of the batteries of electric automobile is detected, the lug temperature is sent to the electricity
Pond manages system；
When the battery management system judges that the lug temperature is more than the battery protection temperature, sends out alarm and carry
Show.
In one embodiment, the positive electrode and electrolyte of the determining single battery for constituting batteries of electric automobile
The first temperature to react includes：
O ion concentrations value and R ion concentration values are detected via ion concentration measurement instrument, and institute is detected via potentiometric detector
State the equilibrium electrod potential of positive electrode；
Equilibrium electrod potential based on the O ion concentrations value, R ion concentrations value and the positive electrode calculates anode
Material symmetry coefficient；
The potential and current density of the positive electrode are measured twice, and the electricity of positive electrode is calculated based on measured value twice
Constant in the relation function of gesture and current density, using the constant as positive electrode temperature coefficient；
First temperature is calculated based on the positive electrode temperature coefficient and the positive electrode symmetry coefficient.
In one embodiment, the positive electrode symmetry coefficient includes the first coefficient and the second coefficient, wherein described
First coefficient and second coefficient and be 1.
In one embodiment, the negative material and electrolyte of the determining single battery for constituting batteries of electric automobile
The second temperature to react includes：
O ion concentrations value and R ion concentration values are detected via ion concentration measurement instrument, and institute is detected via potentiometric detector
State the equilibrium electrod potential of negative material；
Equilibrium electrod potential based on the O ion concentrations value, R ion concentrations value and the negative material calculates cathode
Material symmetry coefficient；
The potential and current density of the negative material are measured twice, and the electricity of negative material is calculated based on measured value twice
Constant in the relation function of gesture and current density, using the constant as negative material temperature coefficient；
The second temperature is calculated based on the negative material temperature coefficient and the negative material symmetry coefficient.
In one embodiment, the negative material symmetry coefficient includes third coefficient and the 4th coefficient, wherein described
Third coefficient and the 4th coefficient and be 1.
In one embodiment, this method further includes at least one of following：
When the battery management system judges that the lug temperature is less than or equal to the battery protection temperature, send out normal
Prompt；
When the battery management system judges that the lug temperature is more than the battery protection temperature, battery protection is sent out
Device triggering command；
When the battery management system judges that the lug temperature is more than the battery protection temperature, electric vehicle is sent out
Battery is stopped instruction.
A kind of temperature alarming device of batteries of electric automobile, including：
Memory module, for determining that the positive electrode for the single battery for constituting batteries of electric automobile reacts with electrolyte
The first temperature, determine what the negative material for the single battery for constituting the batteries of electric automobile reacted with the electrolyte
Second temperature determines the smaller value in first temperature and the second temperature, and battery protection is arranged based on the smaller value
Temperature, and will be in battery protection temperature storage to battery management system；
Detection module, the lug temperature at single battery for detecting the batteries of electric automobile, by the lug temperature
Degree is sent to the battery management system；
Alarm module, for judging that the lug temperature is more than the battery protection temperature when the battery management system
When, send out alarm.
In one embodiment, memory module, for via ion concentration measurement instrument detect O ion concentrations value and R from
Sub- concentration value, and detect via potentiometric detector the equilibrium electrod potential of the positive electrode；Based on the O ion concentrations value, R
The equilibrium electrod potential of ion concentration value and the positive electrode calculates positive electrode symmetry coefficient；The anode is measured twice
The potential and current density of material, and calculated based on measured value twice in the potential of positive electrode and the relation function of current density
Constant, using the constant as positive electrode temperature coefficient；Based on the positive electrode temperature coefficient and the positive electrode
Symmetry coefficient calculates first temperature.
In one embodiment, memory module, for via ion concentration measurement instrument detect O ion concentrations value and R from
Sub- concentration value, and detect via potentiometric detector the equilibrium electrod potential of the negative material；Based on the O ion concentrations value, R
The equilibrium electrod potential of ion concentration value and the negative material calculates negative material symmetry coefficient；The cathode is measured twice
The potential and current density of material, and calculated based on measured value twice in the potential of negative material and the relation function of current density
Constant, using the constant as negative material temperature coefficient；Based on the negative material temperature coefficient and the negative material
Symmetry coefficient calculates the second temperature.
A kind of electric vehicle includes the protective device of any one of them batteries of electric automobile as above.
It can be seen from the above technical proposal that in embodiment of the present invention, the monomer electricity for constituting batteries of electric automobile is determined
The first temperature that the positive electrode in pond reacts with electrolyte determines the cathode material for the single battery for constituting batteries of electric automobile
The second temperature that material reacts with the electrolyte, determines the smaller value in the first temperature and second temperature, is based on smaller value
Battery protection temperature is set, and will be in the storage to battery management system of battery protection temperature；Detect the monomer of batteries of electric automobile
Lug temperature is sent to battery management system by the lug temperature at battery；When battery management system judgement lug temperature is more than
When battery protection temperature, alarm is sent out.Embodiment of the present invention is started with from inside battery reaction, and it is anti-to obtain accurate battery
Temperature is answered, is measured in real time for battery management system, and the battery runaway temperature that gives warning in advance, ensures that battery is safe to use.
Description of the drawings
The following drawings only does schematic illustration and explanation to the present invention, not delimit the scope of the invention.
Fig. 1 is the flow chart according to the temperature alarming method of batteries of electric automobile of the present invention.
Present invention determine that the exemplary flow chart of the first temperature according to Fig. 2.
Present invention determine that the exemplary flow chart of second temperature according to Fig. 3.
Fig. 4 is the structure chart according to the temperature alarming device of batteries of electric automobile of the present invention.
Specific implementation mode
In order to which the technical features, objects and effects to invention are more clearly understood, now control description of the drawings is of the invention
Specific implementation mode, in the various figures identical label indicate identical part.
It is succinct and intuitive in order to what is described, hereafter by describing several representative embodiments come the side to the present invention
Case is illustrated.A large amount of details is only used for helping to understand the solution of the present invention in embodiment.However, it will be apparent that the present invention
Technical solution can be not limited to these details when realizing.In order to avoid unnecessarily having obscured the solution of the present invention, some realities
It applies mode not described meticulously, but only gives frame.Hereinafter, " comprising " refers to " including but not limited to ", " root
According to ... " refer to " according at least to ..., but be not limited to according only to ... ".Due to the speech habits of Chinese, hereinafter without spy
When not pointing out the quantity of an ingredient, it is meant that the ingredient is either one or more, or can be regarded as at least one.
In embodiments of the present invention, the repercussion study based on battery material and electrolyte, analysis different capabilities decaying rank
Section inside battery material and electrolyte between exothermic reaction include to determine battery early warning temperature out of control, detailed process：
(1), single battery is tested
With electrochemical principle, different phase internal temperature of battery is determined, determine electrode material and the electrolysis of single battery
The temperature that liquid reacts.Determine that internal temperature of battery method includes：Passed through using ion concentration measurement instrument detection ion concentration
Formula obtains temperature (it needs to be determined that two parameter alphas, β).
Wherein it is determined that the electrode material of single battery and electrolyte react, the experiment of temperature can carry out at twice.
During this is tested twice, simulated battery is assembled respectively, and the positive electrode to simulate single battery respectively is reacted and simulated with electrolyte
The negative material of single battery is reacted with electrolyte.In simulated environment, obtained using the method for above-mentioned determining internal temperature of battery
The temperature to react to battery electrode material with electrolyte reacts to get to the positive electrode of single battery with electrolyte
Temperature and single battery the temperature that reacts of negative material and electrolyte.Moreover, by the positive electrode of single battery with
Smaller value in the temperature that the negative material for the temperature and single battery that electrolyte reacts reacts with electrolyte determines
For T0.
(2), battery pack real time temperature detects, and gives warning in advance
It is that (for example, T1, which can be arranged, is less than or equal to T0, T1 can be slightly low by T1 that battery protection temperature setting, which is arranged, according to T0
In T0).Also, temperature in use sensor detects temperature at single battery pole ears, and temperature data at lug is transferred to cell tube
Reason system, comparison result of the battery management system again based on temperature at lug and T1 determine the need for early warning.
Fig. 1 is the flow chart according to the temperature alarming method of batteries of electric automobile of the present invention.
As shown in Figure 1, this method includes：
Step 101：Determine that positive electrode and the electrolyte of the single battery for constituting batteries of electric automobile reacts the
One temperature determines the second temperature that the negative material for the single battery for constituting batteries of electric automobile reacts with electrolyte, really
Smaller value in fixed first temperature and second temperature is arranged battery protection temperature based on smaller value, and battery protection temperature is deposited
It stores up in battery management system；
Step 102：The lug temperature at the single battery of batteries of electric automobile is detected, lug temperature is sent to cell tube
Reason system；
Step 103：When battery management system judgement lug temperature is more than battery protection temperature, alarm is sent out.
In one embodiment, the positive electrode and electrolyte for determining the single battery for constituting batteries of electric automobile occur
Reaction the first temperature include：
First, the simulated battery of three-electrode system is assembled.The simulated battery includes positive (the i.e. positive material of single battery
Material is this measurement object), cathode, reference electrode and electrolyte, wherein cathode is to stablize than the positive electrode of single battery
Electrode, for example may be embodied as carbon pole.Then, O ion concentrations value and R ion concentrations are detected via ion concentration measurement instrument
Value, and the equilibrium electrod potential of the positive electrode via potentiometric detector detection single battery；Based on O ion concentrations value, R ions
The equilibrium electrod potential of concentration value and positive electrode calculates positive electrode symmetry coefficient；The positive material of single battery is measured twice
The potential and current density of material, and calculated based on measured value twice in the potential of positive electrode and the relation function of current density
Constant, using constant as positive electrode temperature coefficient；The is calculated based on positive electrode temperature coefficient and positive electrode symmetry coefficient
One temperature.
Preferably, positive electrode symmetry coefficient includes the first coefficient and the second coefficient, wherein the first coefficient and the second coefficient
And be 1.
In one embodiment, the negative material and electrolyte for determining the single battery for constituting batteries of electric automobile occur
The second temperature of reaction includes：
First, assemble the simulated battery of three-electrode system, simulated battery include anode (i.e. the negative material of single battery,
For this measurement object), cathode, reference electrode and electrolyte, wherein cathode is the electricity stablized than the negative material of single battery
Pole, for example may be embodied as carbon pole.Then, O ion concentrations value and R ion concentrations are detected via ion concentration measurement instrument
Value, and via the equilibrium electrod potential of potentiometric detector detection negative material；Based on O ion concentrations value, R ion concentrations value and bear
The equilibrium electrod potential of pole material calculates the negative material symmetry coefficient of single battery；The cathode material of single battery is measured twice
The potential and current density of material, and calculated based on measured value twice in the potential of negative material and the relation function of current density
Constant, using constant as negative material temperature coefficient；Based on the negative material temperature coefficient and negative material symmetry coefficient meter
Calculate second temperature.
Preferably, negative material symmetry coefficient includes third coefficient and the 4th coefficient, wherein third coefficient and the 4th coefficient
And be 1.
Embodiment of the present invention is described with specific mathematical derivation below.
Single electron is reacted
The equilibrium potential formula for embodying thermodynamic behaviour is derived from aerodynamic point：
It obtains
Wherein：F is Faraday constant, 96.478kJ/ (V*mol)；K is prefactor；R is gas constant, 8.31441J/
(K*mol)；CoFor O ion concentrations；CRFor R ion concentrations；ψ puts down as equilibrium electrod potential；α, β are carry-over factor or symmetry coefficient；
T is temperature.
Moreover, alpha+beta=1 (3)；
Wherein Co、CRBeing put down with ψ can measure to obtain, and α, β value can be obtained by formula (2) and (3).
Wherein, the experiment of embodiment of the present invention can carry out at twice, assemble simulated battery respectively, to simulate monomer respectively
The negative material that the positive electrode of battery reacts with electrolyte and simulate single battery is reacted with electrolyte；According to testing every time
The α that arrives, β value, then the temperature T tested every time can be obtained by formula (4)：
η=a+blogi (4)
Wherein：η is potential；I is current density；A, b is constant；By measuring the potential and electric current of single electrode twice, i.e.,
A, b value can be obtained.Citing, the positive electrode for simulation single battery and electrolyte reaction test, measure positive electrode twice
Potential and current density, and based on measured value twice calculate positive electrode potential and current density relation function in it is normal
It measures (i.e. a and b values).It illustrates again, the negative material for simulation single battery and electrolyte reaction test measure cathode material twice
The potential and current density of material, and calculated based on measured value twice in the potential of negative material and the relation function of current density
Constant (i.e. a and b values).
Again by following equation (5) and formula (6)
It obtains
When anode polarization,
When cathode polarizes,
Wherein j0For exchange current density.
By a, b, α, β value being previously obtained, temperature T can be obtained according to formula (7) or (8).Temperature T includes single battery
The temperature that reacts with electrolyte of the negative material of temperature and single battery that reacts of positive electrode and electrolyte, so
The negative material of the positive electrode of single battery and electrolyte react afterwards temperature and single battery occurs with electrolyte
Smaller value in the temperature of reaction is determined as T0.
Then, it is T1 that battery protection temperature setting, which is arranged, according to T0 in battery management system, and wherein T1 is less than or equal to T0.
In addition, detecting temperature at single battery pole ears by temperature sensor, the temperature data of battery is transferred to battery
Management system.Comparison result of the battery management system again based on temperature at battery pole ear and T1 determines the need for early warning.Work as electricity
When pond manages system judgement lug temperature more than T1, alarm is sent out.
Preferably, when battery management system judgement lug temperature is less than or equal to T1, regular prompt is sent out.Work as battery management
When system judges that lug temperature is more than T1, it is further sent out battery protecting apparatus triggering command, to which battery protecting apparatus executes
Power operation is to protect cell safety.When battery management system judgement lug temperature is more than T1, sends out batteries of electric automobile and stop
Only work order, to stop electric vehicle to protect passenger safety.
As it can be seen that in embodiments of the present invention, starting with from inside battery reaction, obtaining accurate cell reaction temperature, use
It is measured in real time in battery management system, and the battery runaway temperature that gives warning in advance, ensures that battery is safe to use.
Present invention determine that the exemplary flow chart of the first temperature according to Fig. 2.
As shown in Fig. 2, this method includes：
Step 201：Assemble the simulated battery of three-electrode system.The simulated battery includes anode, cathode, reference electrode and electricity
Liquid is solved, wherein anode is made of single battery positive electrode, cathode is the electrode stablized than the positive electrode of single battery.Via
Ion concentration measurement instrument detects O ion concentrations value and R ion concentration values, and detects single battery anode material via potentiometric detector
The equilibrium electrod potential of material.
Step 202：Equilibrium electrod potential based on O ion concentrations value, R ion concentrations value and single battery positive electrode,
Calculate single battery positive electrode symmetry coefficient.
Step 203：The potential and current density of single battery positive electrode are measured twice, and are calculated based on measured value twice
Constant in the potential of single battery positive electrode and the relation function of current density, using constant as single battery positive electrode
Temperature coefficient.
Step 204：The first temperature is calculated based on single battery positive electrode temperature coefficient and positive electrode symmetry coefficient.
Present invention determine that the exemplary flow chart of second temperature according to Fig. 3.
As shown in figure 3, this method includes：
Step 301：Assemble the simulated battery of three-electrode system.The simulated battery includes anode, cathode, reference electrode and electricity
Liquid is solved, wherein anode is made of single battery negative material, cathode is the electrode stablized than the negative material of single battery.Via
Ion concentration measurement instrument detects O ion concentrations value and R ion concentration values, and detects single battery cathode material via potentiometric detector
The equilibrium electrod potential of material.
Step 302：Equilibrium electrod potential based on O ion concentrations value, R ion concentrations value and single battery negative material,
Calculate single battery negative material symmetry coefficient.
Step 303：The potential and current density of single battery negative material are measured twice, and are calculated based on measured value twice
Constant in the potential of negative material and the relation function of current density, using constant as single battery negative material temperature system
Number.
Step 304：The is calculated based on single battery negative material temperature coefficient and single battery negative material symmetry coefficient
Two temperature.
Based on foregoing description, embodiment of the present invention also proposed a kind of temperature alarming device of batteries of electric automobile.
Fig. 4 is the structure chart according to the protective device of batteries of electric automobile of the present invention.
As shown in figure 4, the device includes：
Memory module 401, for determining that the positive electrode for the single battery for constituting batteries of electric automobile occurs with electrolyte
First temperature of reaction determines the negative material for the single battery for constituting batteries of electric automobile reacts with electrolyte second
Temperature determines the smaller value in the first temperature and the second temperature, battery protection temperature is arranged based on smaller value, and by battery
It protects in temperature storage to battery management system；
Detection module 402, the lug temperature at single battery for detecting batteries of electric automobile, lug temperature is sent
To the battery management system；
Alarm module 403, for when battery management system judgement lug temperature is more than battery protection temperature, sending out alarm
Prompt.
In one embodiment：
Memory module 401 is used for via ion concentration measurement instrument detection O ion concentrations value and R ion concentration values, and via
Potentiometric detector detects the equilibrium electrod potential of positive electrode；Based on O ion concentrations value, R ion concentrations value and positive electrode
Equilibrium electrod potential calculates positive electrode symmetry coefficient；The potential and current density of positive electrode are measured twice, and based on twice
Measured value calculates the constant in the potential of positive electrode and the relation function of current density, using constant as positive electrode temperature system
Number；First temperature is calculated based on positive electrode temperature coefficient and the positive electrode symmetry coefficient.
In one embodiment：
Memory module 401 is used for via ion concentration measurement instrument detection O ion concentrations value and R ion concentration values, and via
Potentiometric detector detects the equilibrium electrod potential of negative material；Based on O ion concentrations value, R ion concentrations value and negative material
Equilibrium electrod potential calculates negative material symmetry coefficient；The potential and current density of negative material are measured twice, and based on twice
Measured value calculates the constant in the potential of negative material and the relation function of current density, using constant as negative material temperature system
Number；Second temperature is calculated based on negative material temperature coefficient and negative material symmetry coefficient.
Embodiment of the present invention can be applied in pure electric automobile (BEV) and hybrid vehicle (PHEV).
The series of detailed descriptions listed above only for the present invention feasible embodiment specifically
It is bright, and not to limit the scope of the invention, it is all without departing from equivalent embodiments made by technical spirit of the present invention or
Change, such as the combination, segmentation or repetition of feature, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of temperature alarming method of batteries of electric automobile, which is characterized in that including：
It determines the positive electrode for the single battery for constituting batteries of electric automobile and the first temperature that electrolyte reacts, determines structure
At the second temperature that negative material and the electrolyte of the single battery of the batteries of electric automobile react, determine described in
Battery protection temperature is arranged based on the smaller value in smaller value in first temperature and the second temperature, and by the battery
It protects in temperature storage to battery management system；
The lug temperature at the single battery of the batteries of electric automobile is detected, the lug temperature is sent to the cell tube
Reason system；
When the battery management system judges that the lug temperature is more than the battery protection temperature, alarm is sent out.
2. the temperature alarming method of batteries of electric automobile according to claim 1, which is characterized in that the determining composition electricity
The first temperature that the positive electrode of the single battery of electrical automobile battery reacts with electrolyte includes：
O ion concentrations value and R ion concentration values are detected via ion concentration measurement instrument, and described just via potentiometric detector detection
The equilibrium electrod potential of pole material；
Equilibrium electrod potential based on the O ion concentrations value, R ion concentrations value and the positive electrode calculates positive electrode
Symmetry coefficient；
Measure the potential and current density of the positive electrode twice, and based on measured value twice calculate the potential of positive electrode with
Constant in the relation function of current density, using the constant as positive electrode temperature coefficient；
First temperature is calculated based on the positive electrode temperature coefficient and the positive electrode symmetry coefficient.
3. the temperature alarming method of batteries of electric automobile according to claim 2, which is characterized in that the positive electrode pair
Claim coefficient to include the first coefficient and the second coefficient, wherein first coefficient and second coefficient and be 1.
4. the temperature alarming method of batteries of electric automobile according to claim 1, which is characterized in that the determining composition electricity
The negative material of the single battery of electrical automobile battery includes with the second temperature that electrolyte reacts：
O ion concentrations value and R ion concentration values are detected via ion concentration measurement instrument, and described negative via potentiometric detector detection
The equilibrium electrod potential of pole material；
Equilibrium electrod potential based on the O ion concentrations value, R ion concentrations value and the negative material calculates negative material
Symmetry coefficient；
Measure the potential and current density of the negative material twice, and based on measured value twice calculate the potential of negative material with
Constant in the relation function of current density, using the constant as negative material temperature coefficient；
The second temperature is calculated based on the negative material temperature coefficient and the negative material symmetry coefficient.
5. the temperature alarming method of batteries of electric automobile according to claim 4, which is characterized in that the negative material pair
It includes third coefficient and the 4th coefficient to claim coefficient, wherein the third coefficient and the 4th coefficient and be 1.
6. the temperature alarming method of batteries of electric automobile according to any one of claims 1-5, which is characterized in that the party
Method further includes at least one of following：
When the battery management system judges that the lug temperature is less than or equal to the battery protection temperature, sends out and normally carry
Show；
When the battery management system judges that the lug temperature is more than the battery protection temperature, battery protecting apparatus is sent out
Triggering command；
When the battery management system judges that the lug temperature is more than the battery protection temperature, batteries of electric automobile is sent out
Be stopped instruction.
7. a kind of temperature alarming device of batteries of electric automobile, which is characterized in that including：
Memory module, for determining that positive electrode and the electrolyte of the single battery for constituting batteries of electric automobile reacts
One temperature determines the negative material for the single battery for constituting the batteries of electric automobile reacts with the electrolyte second
Temperature determines the smaller value in first temperature and the second temperature, and battery protection temperature is arranged based on the smaller value,
And it will be in battery protection temperature storage to battery management system；
Detection module, the lug temperature at single battery for detecting the batteries of electric automobile send out the lug temperature
It is sent to the battery management system；
Alarm module, for when the battery management system judges that the lug temperature is more than the battery protection temperature, sending out
Go out alarm.
8. the temperature alarming device of batteries of electric automobile according to claim 7, which is characterized in that
Memory module for detecting O ion concentrations value and R ion concentration values via ion concentration measurement instrument, and is examined via potential
Survey the equilibrium electrod potential that device detects the positive electrode；Based on the O ion concentrations value, R ion concentrations value and the anode
The equilibrium electrod potential of material calculates positive electrode symmetry coefficient；The potential and current density of the positive electrode are measured twice,
And based on measured value twice calculate positive electrode potential and current density relation function in constant, using the constant as
Positive electrode temperature coefficient；First temperature is calculated based on the positive electrode temperature coefficient and the positive electrode symmetry coefficient
Degree.
9. the temperature alarming device of batteries of electric automobile according to claim 7, which is characterized in that
Memory module for detecting O ion concentrations value and R ion concentration values via ion concentration measurement instrument, and is examined via potential
Survey the equilibrium electrod potential that device detects the negative material；Based on the O ion concentrations value, R ion concentrations value and the cathode
The equilibrium electrod potential of material calculates negative material symmetry coefficient；The potential and current density of the negative material are measured twice,
And based on measured value twice calculate negative material potential and current density relation function in constant, using the constant as
Negative material temperature coefficient；Second temperature is calculated based on the negative material temperature coefficient and the negative material symmetry coefficient
Degree.
10. a kind of electric vehicle, which is characterized in that including batteries of electric automobile as claimed in any one of claims 7-9
Temperature alarming device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111687686A (en) * | 2019-03-15 | 2020-09-22 | 发那科株式会社 | Temperature interpolation device |
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