CN108663632A - A kind of vehicle power management system and method - Google Patents
A kind of vehicle power management system and method Download PDFInfo
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- CN108663632A CN108663632A CN201810488106.9A CN201810488106A CN108663632A CN 108663632 A CN108663632 A CN 108663632A CN 201810488106 A CN201810488106 A CN 201810488106A CN 108663632 A CN108663632 A CN 108663632A
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- Prior art keywords
- accumulator
- density
- electrolyte
- power source
- management controller
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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]
- G01R31/3644—Constructional arrangements
Abstract
The invention discloses a kind of vehicle power management system and methods, including accumulator, generator, power source management controller, display alarm module, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor, accumulator is connect with generator, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor respectively, and power source management controller is connect with accumulator, generator, display alarm module, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor respectively.When accumulator remaining capacity X values are less than 50%, power source management controller provides exciting current to generator；When accumulator remaining capacity X values are more than 50%, power source management controller stops providing exciting current to generator.In addition, the present invention by acquire accumulator idling carry with normal load when voltage, calculate accumulator internal resistance increase percentage Kre, by with predetermined threshold value relatively after, judge the performance condition of accumulator.
Description
Technical field
The present invention relates to power technique fields, more particularly to a kind of vehicle power management system and method.
Background technology
As consumer increasingly improves vehicle safety, environmental protection and intelligentized requirement, automobile vendor is to meet people couple
The multifarious demand of vehicle functions gradually increases numerous electronic apparatus configuration features on vehicle, and vehicle mounted electrical apparatus equipment is caused to increase
Mostly increase with power consumption, reaches the increasing of vehicle electricity dynamic equilibrium difficulty.
For accumulator as vehicle vital power supply component, the performance of accumulator can influence the operating condition of in-vehicle device, therefore,
Then need to know in time the working condition of battery for battery inferior, it is finding to be unable to normal use in time and be updated replacement
Or eliminate, to ensure the normal work of equipment.
Existing vehicle power management system is merely able to realize that the charge and discharge to accumulator is electrically operated, cannot achieve to electric power storage
The detection of pond performance, the diagnosis of accumulator health status, and progress charge and discharge control is judged according to the calculating of remaining capacity, it is inconvenient
It is higher in vehicle maintenance personnel detection or maintenance free cell, cost of labor.
Invention content
In view of the foregoing drawbacks, the purpose of the present invention is to provide a kind of vehicle power management system and methods, can be automatic
To being detected of accumulator property, the health status of accumulator is diagnosed, is accurately filled according to calculating remaining capacity
Control of discharge, it is ensured that accumulator is in good working order, and then the normal work of support vehicles always.
The present invention to achieve the above object, is achieved through the following technical solutions：A kind of vehicle power management system, including store
Battery, generator, power source management controller, display alarm module, internal resistance measurement module, density of electrolyte sensor and electrolyte
Temperature sensor, accumulator respectively with generator, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor
Connection, power source management controller are passed with accumulator, generator, display alarm module, internal resistance measurement module, density of electrolyte respectively
Sensor is connected with electrolyte temperature sensor.Density of the density of electrolyte sensor for acquiring battery liquid in real time
Data, and density data is sent to power source management controller.The density of electrolyte sensor for acquiring accumulator in real time
The temperature data of electrolyte, and temperature data is sent to power source management controller.The internal resistance measurement module is used for each
Internal resistance calculating parameter of accumulator under the conditions of Constant Current Load is measured after engine misses, and transfers data to power management control
Device processed, internal resistance measurement module include voltage measurement module and Constant Current Load, voltage measurement module and Constant Current Load respectively with electric power storage
Pond connects.The power source management controller is according to the remaining capacity of density data and temperature data calculating accumulator, and according to surplus
Remaining electricity control generator starts, and control shows that alarm module shows early warning；Power source management controller judges according to internal resistance data
The performance condition of accumulator, and control display alarm module and show early warning.The display warning module is remaining for real-time display
Electricity, and show the information warning that power source management controller is sent.
Further, using the electric quantity controlling method of vehicle power management system described in claim 1, including：Work as accumulator
When remaining capacity X values are less than 50%, power source management controller provides exciting current to generator；When accumulator remaining capacity X values are big
When 50%, power source management controller stops providing exciting current to generator.
Further, the calculating of accumulator remaining capacity X values, includes the following steps：
A) relationship of introducing temperature correction coefficient r, temperature correction coefficient r and density is fitted to quadratic function r=0.00285-
0.00479ρt+0.00159ρt 2, wherein ρtFor electrolyte actual density, unit is gcm-3, the scope of application：Density 1~1.4
g·cm-3；
For density of electrolyte when b) using 25oC as the reference density ρ of electrolyte, specific reduction formula is ρ=ρt+ r (25-t),
Unit is gcm-3, wherein t is electrolyte observed temperature；
C) accumulator terminates from full charge to electric discharge, and the reference density ρ of electrolyte about declines 0.16gcm-3, electrolysis
The reference density ρ of liquid often declines 0.01 gcm-3Battery discharging 6%；By calculating electrolyte reference density changing value Δ ρ,
Accumulator remaining capacity X, accumulator remaining capacity X calculation formula can be found out：X=6×Δρ×100%.
Further, when the continuous 30s of accumulator remaining capacity X are less than the 50% of rated capacity, display alarm module is stored
The too low alarm of battery capacity.
Further, when the continuous 30s of reference density ρ of battery liquid are more than 1.34 gcm-3When, show alarm module
Carry out the excessively high alarm of accumulator density；When the reference density ρ of battery liquid is less than or equal to 1.34 gcm-3When, display report
Alert module is without the excessively high alarm of accumulator density.
Further, when the continuous 3s of battery liquid observed temperature t are higher than 60 DEG C, display alarm module carries out accumulator
The excessively high alarm of temperature；When battery liquid observed temperature t is less than 60 DEG C, display alarm module is without battery temp mistake
Height alarm.
Further, using the judgment method of the accumulator property situation of the vehicle power management system, including：
A) after engine misses, in the constant-current circuit that Constant Current Load and accumulator are constituted, power source management controller controls electric power storage
Pond periodic discharge n times, voltage measurement module measures accumulator idling load and voltage when normal load respectively, and finds out every time
Voltage difference delta Un (n=1,2,3 ... n), using formula R=(Δ U1+Δ U2+...+Δ Un)/(n*I), acquires accumulator
Internal resistance average value R, wherein I is the load current value of accumulator；
B) percentage Kre is increased by the internal resistance of accumulator to judge that the performance condition of accumulator, internal resistance increase percentage Kre
Calculation formula be： Kre=(R-R0)/ R0× 100%, wherein R0 For the specified internal resistance of accumulator；
C) it is more than 25%, i.e. Kre when internal resistance increases percentage Kre>25%, carry out battery altering early warning, after vehicle launch, power supply
Corresponding information is issued display alarm module by Management Controller, is reminded with word plus buzzing alarm mode.
Further, the power source management controller control accumulator periodic discharge 15 times.
Further, the display alarm module includes display screen, alarm lamp and buzzer siren, display screen, alarm lamp and
Buzzer siren is connect with power source management controller respectively.
The prior art is compared, the beneficial effects of the present invention are：Vehicle power management system provided by the invention, including store
Battery, generator, power source management controller, display alarm module, internal resistance measurement module, density of electrolyte sensor and electrolyte
Temperature sensor, accumulator respectively with generator, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor
Connection, power source management controller are passed with accumulator, generator, display alarm module, internal resistance measurement module, density of electrolyte respectively
Sensor is connected with electrolyte temperature sensor；By above structure, the density and temperature data to battery liquid are realized
And the acquisition of the internal resistance calculating parameter of electrolyte.
By calculating density of electrolyte and temperature data, it is possible, firstly, to obtain accumulator remaining capacity X, power management control
Device processed judges whether, to generator offer exciting current, can effectively prevent vehicle from excessively filling accumulator by the numerical value of X
Electricity and over-discharge, and then the service life of extended accumulator；Secondly, the density data of battery liquid passes through formula
After being scaled reference density, by the way that reference density and real time temperature to be compared with threshold value respectively, realize to accumulator temperature
The monitoring of degree and density reminds work once data exception power source management controller, which can control display alarm module, shows early warning
Make personnel to overhaul in time, ensures the safety of Vehicular power supply system.
Under engine misses state, by acquiring accumulator idling load and voltage when normal load, electric power storage is calculated
The internal resistance in pond increases percentage Kre, after Kre and its threshold value comparison, can judge the performance condition of accumulator, vehicle launch
Afterwards, corresponding information is issued display alarm module by power source management controller, is reminded with word plus buzzing alarm mode, is made work people
Member can in time replace accumulator, the effective failure rate for reducing vehicle.
In short, the detection of the invention that can be realized to accumulator property, the calculating judgement of remaining capacity, accumulator health shape
The diagnosis of state, and according to judging result auto charge and discharge and accumulator replacement early warning can be carried out, facilitate vehicle maintenance personnel to examine
Survey or maintenance free cell, it is cost-effective, ensure vehicle safety operating, there is very high practical value and economic benefit.Thus
As it can be seen that the present invention has substantive distinguishing features outstanding and significant progress.
Description of the drawings
Fig. 1 is the electrical diagram of the present invention.
It explains below in conjunction with the accompanying drawings to the specific implementation mode of the present invention.
A kind of vehicle power management system as shown in Figure 1, including accumulator, generator, power source management controller, display
Alarm module, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor, accumulator respectively with generator,
Internal resistance measurement module, density of electrolyte sensor are connected with electrolyte temperature sensor, power source management controller respectively with electric power storage
Pond, generator, display alarm module, internal resistance measurement module, density of electrolyte sensor are connected with electrolyte temperature sensor.Institute
It includes display screen, alarm lamp and buzzer siren to state display alarm module, display screen, alarm lamp and buzzer siren respectively with electricity
Source control controller connects.
Power source management controller module is responsible for carrying out calculation processing to the signal that density of electrolyte sensor acquires, and passes through electricity
It solves liquid-tight degree and calculates current residual electricity, when threshold value of the electricity less than setting, power source management controller module is to generator
Exciting current is provided, while related command is sent to display alarm module, display warning module is with word flicker and buzzing report
Alert mode carries out early warning.
Power source management controller module is also responsible for handling the signal that temperature sensor acquires, when the temperature parsed
When value is more than the threshold value set, related command is sent to display alarm module by power source management controller module, shows early warning mould
Block is alarmed in a manner of word flicker and buzzing alarm.
Internal resistance measurement module includes voltage measurement module and Constant Current Load, voltage measurement module and Constant Current Load respectively with storage
Battery connects, and internal resistance measurement module after each engine misses by measuring accumulator based on internal resistance under the conditions of Constant Current Load
Parameter is calculated, and transfers data to power source management controller, the internal resistance that power source management controller is responsible for calculating accumulator increases
Percentage, when internal resistance increases high percentage in the threshold value of setting, corresponding information is issued display alarm by power source management controller
Module, and battery altering early warning is sent out after vehicle start-up.
Using the electric quantity controlling method of the vehicle power management system, including：
A) relationship of introducing temperature correction coefficient r, temperature correction coefficient r and density is fitted to quadratic function r=0.00285-
0.00479ρt+0.00159ρt 2, wherein ρtFor electrolyte actual density, unit is gcm-3, the scope of application：Density 1~1.4
g·cm-3；
For density of electrolyte when b) using 25oC as the reference density ρ of electrolyte, specific reduction formula is ρ=ρt+ r (25-t),
Unit is gcm-3, wherein t is electrolyte observed temperature；
C) accumulator terminates from full charge to electric discharge, and the reference density ρ of electrolyte about declines 0.16gcm-3, electrolysis
The reference density ρ of liquid often declines 0.01 gcm-3Battery discharging 6%；By calculating electrolyte reference density changing value Δ ρ,
Accumulator remaining capacity X, accumulator remaining capacity X calculation formula can be found out：X=6×Δρ×100%；
D) when the value of X is less than 50%, power source management controller provides exciting current to generator；
E) when the value of X is more than 50%, power source management controller stops providing exciting current to generator；
F) when the continuous 30s of accumulator remaining capacity X are less than the 50% of rated capacity, display alarm module carries out accumulator electric-quantity
Too low alarm；
G) when the continuous 30s of reference density ρ of battery liquid are more than 1.34 gcm-3When, display alarm module carries out electric power storage
The excessively high alarm of pond density；
H) when the reference density ρ of battery liquid is less than or equal to 1.34 gcm-3When, display alarm module is without electric power storage
The excessively high alarm of pond density；
I) when the continuous 3s of battery liquid observed temperature t are higher than 60 DEG C, it is excessively high that display alarm module carries out battery temp
Alarm；
J) when battery liquid observed temperature t is less than 60 DEG C, display alarm module is without the excessively high alarm of battery temp.
Using the accumulator property situation judgment method of the vehicle power management system, including：
A) after engine misses, in the constant-current circuit that Constant Current Load and accumulator are constituted, power source management controller controls electric power storage
Pond periodic discharge n times, voltage measurement module measures accumulator idling load and voltage when normal load respectively, and finds out every time
Voltage difference delta Un (n=1,2,3 ... 15), using formula R=(Δ U1+Δ U2+...+Δ U15)/(15*I), acquire storage
Internal resistance the average value R, wherein I of battery are the load current value of accumulator；
B) percentage Kre is increased by the internal resistance of accumulator to judge that the performance condition of accumulator, internal resistance increase percentage Kre
Calculation formula be： Kre=(R-R0)/ R0× 100%, wherein R0 For the specified internal resistance of accumulator；
C) it is more than 25%, i.e. Kre when internal resistance increases percentage Kre>25%, carry out battery altering early warning, after vehicle launch, power supply
Corresponding information is issued display alarm module by Management Controller, is reminded with word plus buzzing alarm mode.
With reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, this field
Technical staff can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
Claims (9)
1. a kind of vehicle power management system, it is characterised in that：Including accumulator, generator, power source management controller, display report
Alert module, internal resistance measurement module, density of electrolyte sensor and electrolyte temperature sensor, accumulator respectively with generator, interior
Resistance measurement module, density of electrolyte sensor are connected with electrolyte temperature sensor, power source management controller respectively with accumulator,
Generator, display alarm module, internal resistance measurement module, density of electrolyte sensor are connected with electrolyte temperature sensor；
Density data of the density of electrolyte sensor for acquiring battery liquid in real time, and density data is sent to
Power source management controller；
Temperature data of the density of electrolyte sensor for acquiring battery liquid in real time, and temperature data is sent to
Power source management controller；
The internal resistance measurement module after each engine misses by measuring accumulator based on internal resistance under the conditions of Constant Current Load
Parameter is calculated, and transfers data to power source management controller, internal resistance measurement module includes voltage measurement module and Constant Current Load, electricity
Pressure measurement module and Constant Current Load are connect with accumulator respectively；
The power source management controller is according to the remaining capacity of density data and temperature data calculating accumulator, and according to remaining electricity
Amount control generator starts, and control shows that alarm module shows early warning；Power source management controller judges electric power storage according to internal resistance data
The performance condition in pond, and control display alarm module and show early warning；
The display warning module is used for real-time display remaining capacity, and shows the information warning that power source management controller is sent.
2. a kind of electric quantity controlling method using vehicle power management system described in claim 1, it is characterised in that：Work as accumulator
When remaining capacity X values are less than 50%, power source management controller provides exciting current to generator；When accumulator remaining capacity X values are big
When 50%, power source management controller stops providing exciting current to generator.
3. electric quantity controlling method according to claim 2, it is characterised in that：
A) relationship of introducing temperature correction coefficient r, temperature correction coefficient r and density is fitted to quadratic function r=0.00285-
0.00479ρt+0.00159ρt 2, wherein ρtFor electrolyte actual density, unit is gcm-3, the scope of application：Density 1~1.4
g·cm-3；
For density of electrolyte when b) using 25oC as the reference density ρ of electrolyte, specific reduction formula is ρ=ρt+ r (25-t), it is single
Position is gcm-3, wherein t is electrolyte observed temperature；
C) accumulator terminates from full charge to electric discharge, and the reference density ρ of electrolyte about declines 0.16gcm-3, electrolyte
Reference density ρ often decline 0.01 gcm-3Battery discharging 6%；It, can by calculating electrolyte reference density changing value Δ ρ
Find out accumulator remaining capacity X, accumulator remaining capacity X calculation formula：X=6×Δρ×100%.
4. electric quantity controlling method according to claim 2 or 3, it is characterised in that：As the continuous 30s of accumulator remaining capacity X
Less than rated capacity 50% when, display alarm module carry out the too low alarm of accumulator electric-quantity.
5. electric quantity controlling method according to claim 3, it is characterised in that：When the reference density ρ of battery liquid connects
Continuous 30s is more than 1.34 gcm-3When, display alarm module carries out the excessively high alarm of accumulator density；When the ginseng of battery liquid
It examines density p and is less than or equal to 1.34 gcm-3When, display alarm module is without the excessively high alarm of accumulator density.
6. electric quantity controlling method according to claim 2, it is characterised in that：When battery liquid observed temperature t is continuous
When 3s is higher than 60 DEG C, display alarm module carries out the excessively high alarm of battery temp；When battery liquid observed temperature t is less than 60
DEG C when, display alarm module without the excessively high alarm of battery temp.
7. a kind of accumulator property situation judgment method using vehicle power management system described in claim 1, feature exists
In：
A) after engine misses, in the constant-current circuit that Constant Current Load and accumulator are constituted, power source management controller controls electric power storage
Pond periodic discharge n times, voltage measurement module measures accumulator idling load and voltage when normal load respectively, and finds out every time
Voltage difference delta Un (n=1,2,3 ... n), using formula R=(Δ U1+Δ U2+...+Δ Un)/(n*I), acquires accumulator
Internal resistance average value R, wherein I is the load current value of accumulator；
B) percentage Kre is increased by the internal resistance of accumulator to judge that the performance condition of accumulator, internal resistance increase percentage Kre
Calculation formula be： Kre=(R-R0)/ R0× 100%, wherein R0 For the specified internal resistance of accumulator；
C) it is more than 25%, i.e. Kre when internal resistance increases percentage Kre>25%, carry out battery altering early warning, after vehicle launch, power supply
Corresponding information is issued display alarm module by Management Controller, is reminded with word plus buzzing alarm mode.
8. the performance condition judgment method of accumulator according to claim 7, it is characterised in that：The power source management controller
Control accumulator periodic discharge 15 times.
9. vehicle power management system according to claim 1, it is characterised in that：The display alarm module includes display
Screen, alarm lamp and buzzer siren, display screen, alarm lamp and buzzer siren are connect with power source management controller respectively.
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| CN201810488106.9A CN108663632A (en) | 2018-05-21 | 2018-05-21 | A kind of vehicle power management system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488106.9A CN108663632A (en) | 2018-05-21 | 2018-05-21 | A kind of vehicle power management system and method |
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| CN108663632A true CN108663632A (en) | 2018-10-16 |
Family
ID=63777029
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| CN1725025A (en) * | 2004-07-02 | 2006-01-25 | 金百达科技有限公司 | Monitoring and prewarning method for power source internal resistance for vehicle and its device |
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