CN107121640A - Lithium battery SOH statistical systems used for electric vehicle - Google Patents
Lithium battery SOH statistical systems used for electric vehicle Download PDFInfo
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- CN107121640A CN107121640A CN201710333049.2A CN201710333049A CN107121640A CN 107121640 A CN107121640 A CN 107121640A CN 201710333049 A CN201710333049 A CN 201710333049A CN 107121640 A CN107121640 A CN 107121640A
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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Abstract
The invention discloses lithium battery SOH statistical systems used for electric vehicle, including：For the detection terminal for the healthy angle value of two and the above for detecting lithium battery；Weighted value for obtaining each healthy angle value respective weights value according to lithium battery species and working environment chooses module；First microprocessor for drawing the healthy angle value average value of two and the above according to weighted value, formula isS in formulavFor comprehensive health angle value；SjFor healthy angle value；vjFor SjCorresponding weighted value.Present invention lithium battery SOH statistical systems used for electric vehicle, various types of lithium batteries and various environment are applied to by for the different types of lithium battery weighted value different with different ambient As, realizing the present invention.
Description
Technical field
The present invention relates to electric automobile lithium battery, and in particular to lithium battery SOH statistical systems used for electric vehicle.
Background technology
With industrial development and the increase of social demand, automobile plays important angle in social progress and economic development
Color.Auto industry is developed rapidly, has promoted the development of the important industry such as machinery, the energy, rubber, steel, but increasingly also simultaneously
It is faced with the serious problems of environmental protection, energy shortage.In order to solve these problems, electric automobile obtain significant progress and
Very big technological progress, at the same electric automobile all achieved in terms of battery system, power drive system and full-vehicle control it is very big
It is progressive.
On electric automobile, battery system is the part of a key core, and battery is as power source, it is necessary to which energy is close
Degree is high, output power density is high, operating temperature range is broad, have extended cycle life, memory-less effect, self-discharge rate are small.Current lithium
Battery is because of its superior performance, in electric automobile field by large-scale use.Lithium battery possesses plurality of advantages, but also has fatal
Property shortcoming, be exactly that stability test is poor, spontaneous combustion and blast easily occur in extreme circumstances, so needing to enter lithium battery
The rational management of row.Lithium battery health degree is that the important parameter required for reasonable management is carried out to lithium battery, at present to lithium battery
The detection method of health degree is single, it is impossible to poor for applicability suitable for various types of lithium batteries and various working environments.
The content of the invention
The technical problems to be solved by the invention are that the detection method at present to lithium battery health degree is single, it is impossible to be applied to
Various types of lithium batteries and various working environments, it is poor for applicability, it is therefore intended that lithium battery SOH departments of statistic used for electric vehicle are provided
System, solves the above problems.
The present invention is achieved through the following technical solutions：
Lithium battery SOH statistical systems used for electric vehicle, including：For detecting two of lithium battery and the healthy angle value of the above
Detect terminal；Weighted value for obtaining each healthy angle value respective weights value according to lithium battery species and working environment chooses mould
Block；First microprocessor for drawing the healthy angle value average value of two and the above according to weighted value, formula isS in formulavFor comprehensive health angle value；SjFor healthy angle value；vjFor SjCorresponding weighted value, j is natural number,
N is natural number.
Detection method at present to lithium battery dump energy is single, it is impossible to suitable for various types of lithium batteries and various works
Make environment, it is poor for applicability.Different types of lithium battery, its characteristic is different, such as lithium manganate battery cycle performance is poor, internal resistance change
It is larger, do not fit through internal resistance method and detect its health degree.And the larger area of temperature change, battery capacity can be with temperature change
And fluctuate, do not fit through battery capacity method and detect its health degree.
When the present invention is applied, detection terminal obtains two and the healthy angle value of the above of lithium battery；Weighted value chooses module root
The corresponding weighted value of each healthy angle value is obtained according to lithium battery species and working environment；First microprocessor is according to weighted value vj
Go out the average value of two and the healthy angle value of the above, formula is as follows：S in formulavFor comprehensive health angle value；SjFor
Healthy angle value；vjFor SjCorresponding weighted value, j is natural number, and n is natural number.
For different types of lithium battery and different environment, modification weighted value vj, it is possible to so that the present invention is applied to
Different types of lithium battery and different environment.Such as lithium manganate battery cycle performance is poor, and internal resistance is changed greatly, and does not fit through
Internal resistance method detects its health degree, then the weighted value for the health degree that reduction is detected by internal resistance method, and improves and intended by voltage curve
The weighted value of the health degree of legal detection, effectively raises the applicability of the present invention.The present invention is by for different types of
The lithium battery weighted value different with different ambient As, realizes the present invention and is applied to various types of lithium batteries and various rings
Border.
Further, in addition to：For weighted value to be chosen into the first CAN module that module is connected to CAN；Inspection
Survey terminal and be connected to CAN, and module is chosen by CAN and weighted value and enter row data communication.
When the present invention is applied, detection terminal is chosen module with weighted value by CAN and the first CAN module and carried out
Data communication, it is to avoid network conflict, realizes efficient data transfer.
Further, detection terminal includes：Internal resistance detection module for detecting internal resistance；In being drawn according to internal resistance
Second microprocessor of the healthy angle value of resistance；For the healthy angle value of internal resistance to be sent into the first CAN module by CAN
Second CAN module.
Further, second microprocessor show that the formula of the healthy angle value of internal resistance is：In formula
RnowFor current internal resistance, RnewFor internal resistance of dispatching from the factory, RoldTo scrap internal resistance.
When the present invention is applied, the detection internal resistance of internal resistance detection module, the second microprocessor is according to internal resistance and passes through formula Obtain the healthy angle value S of internal resistancej, R in formulanowFor current internal resistance, RnewFor internal resistance of dispatching from the factory, RoldTo scrap internal resistance, second
The healthy angle value of internal resistance is sent to the first CAN module by CAN module by CAN.
Further, detection terminal includes：Capacity check module for detecting battery capacity；For according to battery capacity
Draw the 3rd microprocessor of the healthy angle value of capacity；For the healthy angle value of capacity to be sent into the first CAN by CAN
3rd CAN module of module.
Further, the 3rd microprocessor show that the formula of the healthy angle value of capacity is：In formula
CnewFor the capacity that dispatches from the factory, CNFor current capacities, CMTo scrap capacity.
When the present invention is applied, capacity check module detection battery capacity, the 3rd microprocessor passes through public affairs according to battery capacity
FormulaObtain the healthy angle value S of capacityj, C in formulanewFor the capacity that dispatches from the factory, CNFor current capacities, CMTo scrap capacity.The
The healthy angle value of capacity is sent to the first CAN module by three CAN modules by CAN.
Further, detection terminal includes：The voltage fitting detection mould of parameter needed for for detecting voltage curve fitting process
Block；The 4th of the healthy angle value of voltage fitting is drawn by voltage curve fitting process for the parameter according to needed for voltage curve fitting process
Microprocessor；The 4th CAN module for the healthy angle value of voltage to be sent to the first CAN module by CAN.
Further, the 4th microprocessor show that the formula of the healthy angle value of voltage is：Formula
Middle C1For t1Moment voltage corresponding charge value, C in voltage curve2For t2Moment voltage corresponding electricity in voltage curve
Value, I is charging current, and C is battery capacity.
When the present invention is applied, parameter, the 4th microprocessor needed for voltage fitting detection module detection voltage curve fitting process
The parameter according to needed for voltage curve fitting process passes through formulaObtain the healthy angle value S of voltagej, C in formula1For t1
Moment voltage corresponding charge value, C in voltage curve2For t2Moment voltage corresponding charge value in voltage curve, I is to fill
Electric current, C is battery capacity.The healthy angle value of voltage is sent to the first CAN by the 4th CAN module by CAN
Module.
The present invention compared with prior art, has the following advantages and advantages：
Present invention lithium battery SOH statistical systems used for electric vehicle, by for different types of lithium battery and different rings
Border sets different weighted values, realizes the present invention and is applied to various types of lithium batteries and various environment.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is present system structural representation.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment 1
As shown in figure 1, lithium battery SOH statistical systems used for electric vehicle of the invention, including：Two for detecting lithium battery
And the detection terminal of the healthy angle value of the above；For obtaining each healthy angle value respective weights according to lithium battery species and working environment
The weighted value of value chooses module；First microprocessor for drawing two and the healthy angle value average value of the above according to weighted value,
Formula isS in formulavFor comprehensive health angle value；SjFor healthy angle value；vjFor SjCorresponding weighted value, j is
Natural number, n is natural number.
When the present embodiment is implemented, it is preferably database server that weighted value, which chooses module, and first microprocessor is preferably
Cortex-A15, detection terminal obtains two and the healthy angle value of the above of lithium battery；Weighted value chooses module according to lithium battery kind
Class and working environment obtain the corresponding weighted value of each healthy angle value；First microprocessor is according to weighted value vjDraw two and with
The average value of upper healthy angle value, formula is as follows：S in formulavFor comprehensive health angle value；SjFor healthy angle value；vj
For SjCorresponding weighted value, j is natural number, and n is natural number.
For different types of lithium battery and different environment, modification weighted value vj, it is possible to so that the present invention is applied to
Different types of lithium battery and different environment.Such as lithium manganate battery cycle performance is poor, and internal resistance is changed greatly, and does not fit through
Internal resistance method detects its health degree, then the weighted value for the health degree that reduction is detected by internal resistance method, and improves and intended by voltage curve
The weighted value of the health degree of legal detection, effectively raises the applicability of the present invention.The present invention is by for different types of
The lithium battery weighted value different with different ambient As, realizes the present invention and is applied to various types of lithium batteries and various rings
Border.
Embodiment 2
As shown in figure 1, the present embodiment is on the basis of embodiment 1, in addition to：For weighted value selection module to be connected to
First CAN module of CAN；Detection terminal is connected to CAN, and chooses module by CAN and weighted value
Enter row data communication.
When the present embodiment is implemented, the first CAN module is preferably EtherCAN, and detection terminal passes through CAN and the
One CAN module and weighted value choose module and enter row data communication, it is to avoid network conflict, realize efficient data and pass
It is defeated.
Embodiment 3
As shown in figure 1, the present embodiment is on the basis of embodiment 2, detection terminal includes：For detecting that the internal resistance of internal resistance is examined
Survey module；The second microprocessor for drawing the healthy angle value of internal resistance according to internal resistance；For the healthy angle value of internal resistance is total by CAN
Line is sent to the second CAN module of the first CAN module.Second microprocessor draws the public affairs of the healthy angle value of internal resistance
Formula is：R in formulanowFor current internal resistance, RnewFor internal resistance of dispatching from the factory, RoldTo scrap internal resistance.
When the present embodiment is implemented, the second CAN module is preferably EtherCAN, and the second microprocessor is preferably
ARM740T, internal resistance detection module is preferably ZX-NZY01, and internal resistance detection module detects internal resistance, and the second microprocessor is according to internal resistance
And pass through formulaObtain the healthy angle value S of internal resistancej, R in formulanowFor current internal resistance, RnewFor internal resistance of dispatching from the factory, Rold
To scrap internal resistance, the healthy angle value of internal resistance is sent to the first CAN module by the second CAN module by CAN.
Embodiment 4
As shown in figure 1, the present embodiment is on the basis of embodiment 2, detection terminal includes：Appearance for detecting battery capacity
Measure detection module；The 3rd microprocessor for drawing the healthy angle value of capacity according to battery capacity；For by the healthy angle value of capacity
The 3rd CAN module of the first CAN module is sent to by CAN.
Further, the 3rd microprocessor show that the formula of the healthy angle value of capacity is：In formula
CnewFor the capacity that dispatches from the factory, CNFor current capacities, CMTo scrap capacity.
When the present embodiment is implemented, the 3rd CAN module is preferably EtherCAN, and the 3rd microprocessor is preferably
ARM740T, capacity check module is preferably SFJ48/100, capacity check module detection battery capacity, the 3rd microprocessor according to
Battery capacity passes through formulaObtain the healthy angle value S of capacityj, C in formulanewFor the capacity that dispatches from the factory, CNFor current capacities,
CMTo scrap capacity.The healthy angle value of capacity is sent to the first CAN module by the 3rd CAN module by CAN.
Embodiment 5
As shown in figure 1, the present embodiment is on the basis of embodiment 2, detection terminal includes：For detecting that voltage curve is fitted
The voltage fitting detection module of parameter needed for method；Pass through voltage curve fitting process for the parameter according to needed for voltage curve fitting process
Draw the 4th microprocessor of the healthy angle value of voltage fitting；For the healthy angle value of voltage to be sent into the first CAN by CAN
4th CAN module of bus module.4th microprocessor show that the formula of the healthy angle value of voltage is：C in formula1For t1Moment voltage corresponding charge value, C in voltage curve2For t2Moment, voltage was in voltage
Corresponding charge value in curve, I is charging current, and C is battery capacity.
When the present embodiment is implemented, the 4th CAN module is preferably EtherCAN, and the 4th microprocessor is preferably
ARM740T, voltage fitting detection module is preferably SY-DP4-DV1000, voltage fitting detection module detection voltage curve fitting
Parameter needed for method, the 4th microprocessor parameter according to needed for voltage curve fitting process passes through formulaObtain electricity
The healthy angle value S of pressurej, C in formula1For t1Moment voltage corresponding charge value, C in voltage curve2For t2Moment voltage is bent in voltage
Corresponding charge value in line, I is charging current, and C is battery capacity.The healthy angle value of voltage is passed through CAN by the 4th CAN module
Bus is sent to the first CAN module.
Embodiment 6
The present embodiment is on the basis of embodiment 1 to 5, and battery uses lithium manganate battery.
When the present embodiment is implemented, the healthy angle value S of internal resistance obtained by internal resistance methodj=80%, obtained by battery capacity method
The healthy angle value S of capacity arrivedj=75%, the healthy angle value S of voltage obtained by voltage curve fitting processj=78%, due to mangaic acid
Lithium battery cycle performance is poor, and internal resistance is changed greatly, and detects that its internal resistance will be inaccurate, is not suitable for detecting health degree with internal resistance method,
So the corresponding weighted value of the healthy angle value of reduction internal resistance, weight selection value is as follows：v1=0.1, v2=0.3, v3=0.6；
Embodiment 7
The present embodiment is on the basis of embodiment 6, and temperature is 38 DEG C.
When the present embodiment is implemented, the healthy angle value S of internal resistance obtained by internal resistance methodj=80%, obtained by battery capacity method
The healthy angle value S of capacity arrivedj=75%, the healthy angle value S of voltage obtained by voltage curve fitting processj=78%, due to temperature
It is higher, and battery electric quantity can be with temperature change, will be inaccurate by the health degree of electric power detection battery, be not suitable for using battery
Volumetric method detects battery health degree, so the corresponding weighted value of the healthy angle value of reduction electricity, weight selection value is as follows：v1=0.2,
v2=0.1, v3=0.7；
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (8)
1. lithium battery SOH statistical systems used for electric vehicle, it is characterised in that including：
For the detection terminal for the healthy angle value of two and the above for detecting lithium battery；
Weighted value for obtaining each healthy angle value respective weights value according to lithium battery species and working environment chooses module；
First microprocessor for drawing the healthy angle value average value of two and the above according to weighted value, formula is
S in formulavFor comprehensive health angle value；SjFor healthy angle value；vjFor SjCorresponding weighted value；J is natural number, and n is natural number.
2. lithium battery SOH statistical systems used for electric vehicle according to claim 1, it is characterised in that also include：
For weighted value to be chosen into the first CAN module that module is connected to CAN；
Detection terminal is connected to CAN, and enters row data communication by CAN and weighted value selection module.
3. lithium battery SOH statistical systems used for electric vehicle according to claim 2, it is characterised in that detection terminal includes：
Internal resistance detection module for detecting internal resistance；
The second microprocessor for drawing the healthy angle value of internal resistance according to internal resistance；
The second CAN module for the healthy angle value of internal resistance to be sent to the first CAN module by CAN.
4. lithium battery SOH statistical systems used for electric vehicle according to claim 3, it is characterised in that second micro- place
Reason device show that the formula of the healthy angle value of internal resistance is：
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R in formulanowFor current internal resistance, RnewFor internal resistance of dispatching from the factory, RoldTo scrap internal resistance.
5. lithium battery SOH statistical systems used for electric vehicle according to claim 2, it is characterised in that detection terminal includes：
Capacity check module for detecting battery capacity；
The 3rd microprocessor for drawing the healthy angle value of capacity according to battery capacity；
The 3rd CAN module for the healthy angle value of capacity to be sent to the first CAN module by CAN.
6. lithium battery SOH statistical systems used for electric vehicle according to claim 5, it is characterised in that the 3rd micro- place
Reason device show that the formula of the healthy angle value of capacity is：
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C in formulanewFor the capacity that dispatches from the factory, CNFor current capacities, CMTo scrap capacity.
7. lithium battery SOH statistical systems used for electric vehicle according to claim 2, it is characterised in that detection terminal includes：
The voltage fitting detection module of parameter needed for for detecting voltage curve fitting process；
The of the healthy angle value of voltage fitting is drawn by voltage curve fitting process for the parameter according to needed for voltage curve fitting process
Four microprocessors；
The 4th CAN module for the healthy angle value of voltage to be sent to the first CAN module by CAN.
8. lithium battery SOH statistical systems used for electric vehicle according to claim 7, it is characterised in that the 4th micro- place
Reason device show that the formula of the healthy angle value of voltage is：
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C in formula1For t1Moment voltage corresponding charge value, C in voltage curve2For t2Moment voltage is corresponding in voltage curve
Charge value, I is charging current, and C is battery capacity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN108037462A (en) * | 2017-12-14 | 2018-05-15 | 株洲广锐电气科技有限公司 | Storage battery health status quantization method and system |
| CN108107372A (en) * | 2017-12-14 | 2018-06-01 | 株洲广锐电气科技有限公司 | Accumulator health status quantization method and system based on the estimation of SOC subregions |
| CN110161424A (en) * | 2018-02-11 | 2019-08-23 | 北汽福田汽车股份有限公司 | The method for detecting health status and system and vehicle of power battery |
| CN112018906A (en) * | 2020-08-27 | 2020-12-01 | 洛阳理工学院 | Self-adaptive wireless charging system for whole life cycle of lithium battery |
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| CN108037462A (en) * | 2017-12-14 | 2018-05-15 | 株洲广锐电气科技有限公司 | Storage battery health status quantization method and system |
| CN108107372A (en) * | 2017-12-14 | 2018-06-01 | 株洲广锐电气科技有限公司 | Accumulator health status quantization method and system based on the estimation of SOC subregions |
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