CN106451655A - Nickel-metal hydride battery large-current equalization method based on ARM control - Google Patents
Nickel-metal hydride battery large-current equalization method based on ARM control Download PDFInfo
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- CN106451655A CN106451655A CN201610990840.6A CN201610990840A CN106451655A CN 106451655 A CN106451655 A CN 106451655A CN 201610990840 A CN201610990840 A CN 201610990840A CN 106451655 A CN106451655 A CN 106451655A
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- battery
- contactor
- voltage
- nickel
- metal hydride
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- Power Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a nickel-metal hydride battery large-current equalization method based on ARM control. The method is characterized in that a nickel-metal hydride battery control system is set, the nickel-metal hydride battery control system comprises at least two serially-connected nickel-metal hydride batteries, first contactors, second contactors, a large-current discharge resistor, a nickel-metal hydride battery voltage detecting module, an ARM controller and a protecting device, and each nickel-metal hydride battery corresponds to one first contactor and one second contactor; the ARM controller acquires the voltage of each nickel-metal hydride battery through the nickel-metal hydride battery detecting module, and the nickel-metal hydride battery with the largest voltage is discharged through the large-current discharge resistor according to set time when the equalization degree among the nickel-metal hydride batteries is larger than a set threshold. The nickel-metal hydride battery large-current equalization method has the advantages that the ARM controller is used as the main equalization controller, and control stability and quickness are increased; large-current discharge of the nickel-metal hydride batteries is achieved by a contactor matrix manner so as to increase equalization reliability; the method is simple to operate, safe and reliable, and good in equalization effect.
Description
Technical field
The invention belongs to the balancing technique field of Ni-MH battery group, particularly to a kind of Ni-MH battery based on ARM control
High current equalization methods.
Background technology
The development of fuel-engined vehicle causes the huge consumption of petroleum resources, the continuous intensification of global energy crisis, simultaneously plus
The acute harm of greenhouse effect and atmospheric pollution.Most countries, government and Automobile Enterprises are all it is well recognized that save in the world
Can reduce discharging is the developing direction of future automobile industry, and Development of EV will be the optimum method solving this difficult point.Electronic
It is low that automobile has a noise, emission-free discharge, environmental friendliness, and the thermal efficiency is high, discharges low, recoverable, improves energy resource structure etc.
Advantage.Each automobile production enterprise is just actively researching and developing electric automobile, and Chinese Government also promotes electric automobile positive.Electric automobile root
Pure electric automobile, hybrid-electric car and FC-EV can be roughly divided into according to power source.These electric automobiles one
As can configure battery as energy-storage travelling wave tube, particularly in pure electric automobile extensively application multi-string battery as power source.
Ni-MH battery includes a positive plate with nickel hydroxide as main active and the negative electrode of an absorption hydrogen closes
Golden plate, inside has a dividing plate being made up of fiber, is contained in metal shell with alkaline electrolyte, and one piece of band can automatically open up completely
The sealing plate of aerofluxuss.
Because each monomer of Ni-MH battery group is all different individualities, in production technology, the factor such as production time leads to
There is difference in battery performance index.Although with the continuous progress of technology, before dispatching from the factory, the difference between Ni-MH battery inside is continuous
Reduce, but during using, faint discordance constantly can be amplified with use condition.Such discordance will be led
Cause the capacity of whole group Ni-MH battery increasing with design load deviation.In charging process, the little monomer of capacity will be filled first
Full, lead to the battery of other capacity can not obtain enough capacity；In discharge process, the little monomer of capacity is discharged into first
Blanking voltage, whole group battery will stop electric discharge.The presence of such problem of inconsistency, causes the active volume of Ni-MH battery group
With aspects such as service lifes far away from cell, and increase difficulty battery being managed and controlling.Practice have shown that,
Capacity is occurred significantly to reduce when the consistency problem of set of cells develops into Individual cells, when internal resistance significantly improves, whole group
The performance of battery can be in short time high progression, so that whole set of cells is scrapped.
In order to solve Ni-MH battery group problem of inconsistency, there has been proposed the balancing technique of Ni-MH battery.Balanced management
To the effect that detect Ni-MH battery group voltage, the parameter such as electric current, these parameters are identified, analysis battery consistent
Property, discharged by the control device monomer high to energy body, so that the state of each monomer is reached unanimity.By effectively equal
Weighing apparatus control strategy and equalizing circuit can improve the consistency problem of set of cells, can extend the life-span of set of cells, reduce battery
The maintenance cost of group, makes the electric automobile that safe and efficient intelligence uses put it over.
Equalization methods general at present are to configure a discharge resistance to each Ni-MH battery, by checking each monomer
Voltage, the monomer higher to monomer is discharged by oneself corresponding discharge resistance.When Ni-MH battery Capacity Ratio is larger,
This discharge resistance discharge current would become hard to meet the requirement of fast uniform.If by corresponding for each Ni-MH battery discharge resistance work(
Rate becomes big, and, by the face of new challenge, existing using resistance, method seldom has high current side in a balanced way in a balanced way for its volume and radiating
Method.
Content of the invention
It is an object of the invention to provide a kind of Ni-MH battery high current equalization methods based on ARM control.
Concretely comprise the following steps：
(1) a set of Ni-MH battery control system is set, including Ni-MH battery group, heavy-current discharge resistance, the inspection of Ni-MH battery voltage
Survey module, ARM controller and protection device, wherein Ni-MH battery group includes the Ni-MH battery of at least two series connection, each ni-mh
The all corresponding first contactor of battery and a second contactor；The positive pole of Ni-MH battery passes through its corresponding first contactor
It is connected to the first end of heavy-current discharge resistance, the negative pole of Ni-MH battery is connected to high current by its corresponding second contactor
Second end of discharge resistance；The positive pole of Ni-MH battery can be connected with Ni-MH battery voltage detection module with negative pole with being energized；
ARM controller includes CAN terminal and control terminal, and CAN terminal is connect with Ni-MH battery voltage detection module, control terminal and first
The control terminal of catalyst and second contactor connects；ARM controller controls the corresponding first contactor of Ni-MH battery and second
During catalyst conducting, Ni-MH battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which Ni-MH battery is put with high current
Electric resistor coupled in parallel；Protection device includes D.C. contactor and resettable fuse, D.C. contactor and resettable fuse series connection
It is connected to the negative pole of Ni-MH battery group afterwards together.
Described Ni-MH battery is monomer Ni-MH battery or by multiple basic Ni-MH battery lists for basic Ni-MH battery unit
The Ni-MH battery brick that unit composes in parallel.
(2) the Ni-MH battery control system that step (1) is arranged is run according to following steps：
A. ARM controller is communicated with Ni-MH battery voltage detection module, obtains the voltage of each Ni-MH battery.
B. ARM controller, according to the N number of Ni-MH battery voltage obtaining, finds out the maximum Ni-MH battery of voltage, and wherein N is big
In equal to 2.
C. ARM controller obtains the average voltage of all Ni-MH batteries.
D. when the voltage of the maximum Ni-MH battery of voltage and the average voltage deviations of all Ni-MH batteries are more than a setting valve
Jump into step e during value, otherwise return to step a.
E. ARM controller is made by the maximum corresponding first contactor of Ni-MH battery of control voltage and second contactor
The maximum Ni-MH battery of voltage and heavy-current discharge resistor coupled in parallel, discharge to Ni-MH battery.
F. wait the time T of setting, ARM controller disconnects all contactless contactors by control terminal, program returns step
Rapid a.
(3) complete the Ni-MH battery high current equilibrium that step (2) is realized controlling based on ARM.
The present invention uses a set of Ni-MH battery control system, and this system includes the charging and discharging balance device of Ni-MH battery, makes
Ni-MH battery is effectively managed in charge and discharge process and is equalized, to improve efficiency and the service life of Ni-MH battery, and
Reduce the maintenance cost of Ni-MH battery.The present invention adopts ARM as primary equalization controller, improves the stability controlling, quickly
Property.The present invention adopts catalyst matrix-style, realizes the heavy-current discharge to Ni-MH battery, to improve reliability in a balanced way, and
Realize heavy-current discharge.The inventive method is simple to operate, safe and reliable, and portfolio effect is good.
Brief description
Fig. 1 is the structural representation of Ni-MH battery control system used in the embodiment of the present invention.
Fig. 2 is the balance control method flow chart in embodiment of the present invention charge and discharge process.
Specific embodiment
Embodiment：
The present invention is further described below in conjunction with the accompanying drawings.
Hereinafter describe for disclosing the present invention so that those skilled in the art are capable of the present invention.Excellent in below describing
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.Define in the following description
The ultimate principle of the present invention can apply to other embodiments, deformation program, improvement project, equivalent and not do not carry on the back
Other technologies scheme from the spirit and scope of the present invention.
As shown in figure 1, a kind of Ni-MH battery high current equalization methods based on ARM control, concretely comprise the following steps：
(1) a set of Ni-MH battery control system is set, including Ni-MH battery group, heavy-current discharge resistance R（Carry the big of radiator
Power resistor）, Ni-MH battery voltage detection module, ARM controller and protection device, wherein Ni-MH battery group includes at least two
The Ni-MH battery of series connection, all corresponding first contactor of each Ni-MH battery and a second contactor；Ni-MH battery is just
Pole is connected to the first end of heavy-current discharge resistance R by its corresponding first contactor, and the negative pole of Ni-MH battery is right by it
The second contactor answered is connected to second end of heavy-current discharge resistance R；The positive pole of Ni-MH battery and negative pole and Ni-MH battery electricity
Pressure detection module can be connected with being energized；ARM controller includes CAN terminal and control terminal, CAN terminal and Ni-MH battery electricity
Pressure detection module connects, and control terminal is connected with the control terminal of first contactor and second contactor；ARM controller controls ni-mh
When the corresponding first contactor of battery and second contactor conducting, Ni-MH battery is in parallel with heavy-current discharge resistance R, synchronization
Only one of which Ni-MH battery is in parallel with heavy-current discharge resistance R；Protection device includes D.C. contactor and resettable fuse, directly
Stream catalyst and resettable fuse are connected to the negative pole of Ni-MH battery group after being cascaded.
Described Ni-MH battery is monomer Ni-MH battery for basic Ni-MH battery unit.
The negative pole of equilibrium object Ni-MH battery 1 is connected with the positive pole of Jun Heng object Ni-MH battery 2, described equilibrium object ni-mh
The negative pole of battery 2 is connected with the positive pole of Jun Heng object Ni-MH battery 3, is sequentially connected in series each and equalizes object Ni-MH battery, Zhi Daojun
The negative pole of weighing apparatus object Ni-MH battery N-1 is connected with the positive pole of Jun Heng object Ni-MH battery N, and all Ni-MH batteries are sequentially connected in series
Ni-MH battery group, in described Ni-MH battery group, the just extremely described Ni-MH battery group of described equilibrium object Ni-MH battery 1 is just
Pole, the negative pole of described equilibrium object Ni-MH battery N is the negative pole of described Ni-MH battery group.
The positive pole of each described equilibrium object Ni-MH battery is put by corresponding described first contactor and described high current
The first end of resistance R connects, the negative pole of each described equilibrium object Ni-MH battery pass through corresponding described second contactor and
Second end of described heavy-current discharge resistance R connects, and the control terminal K of described first contactor and described second contactor is in parallel
It is connected with the control terminal of described ARM controller afterwards.
The positive pole of the D1 terminal of each described first contactor and described Jun Heng object Ni-MH battery connects, D2 terminal and institute
The first end stating heavy-current discharge resistance R connects, and control terminal K is connected with ARM control terminal.
The negative pole of the D1 terminal of each described second contactor and described Jun Heng object Ni-MH battery connects, D2 terminal and institute
The second end stating heavy-current discharge resistance R connects, and control terminal K is connected with ARM control terminal.
Described Ni-MH battery voltage detection module can be connected with the positive pole of described Ni-MH battery and negative pole with being energized
Connect, for detecting the voltage of each Ni-MH battery；Linked with described ARM controller by CAN, send out to ARM controller
Send detected voltage signal.
(2) as shown in Fig. 2 the Ni-MH battery control system that step (1) is arranged is run according to following steps：
A. ARM controller is communicated with Ni-MH battery voltage detection module, obtains the voltage of each Ni-MH battery.
B. ARM controller, according to the N number of Ni-MH battery voltage obtaining, finds out the maximum Ni-MH battery of voltage, and wherein N is big
In equal to 2.
C. ARM controller obtains the average voltage of all Ni-MH batteries.
D. when the voltage of the maximum Ni-MH battery of voltage and the average voltage deviations of all Ni-MH batteries are more than a setting valve
Jump into step e during value, otherwise return to step a.
E. ARM controller is made by the maximum corresponding first contactor of Ni-MH battery of control voltage and second contactor
The maximum Ni-MH battery of voltage is in parallel with heavy-current discharge resistance R, and Ni-MH battery is discharged.
F. wait the time T of setting, ARM controller disconnects all contactless contactors by control terminal, program returns step
Rapid a.
(3) complete the Ni-MH battery high current equilibrium that step (2) is realized controlling based on ARM.
Claims (1)
1. a kind of Ni-MH battery high current equalization methods based on ARM control are it is characterised in that concretely comprise the following steps：
(1) a set of Ni-MH battery control system is set, including Ni-MH battery group, heavy-current discharge resistance, the inspection of Ni-MH battery voltage
Survey module, ARM controller and protection device, wherein Ni-MH battery group includes the Ni-MH battery of at least two series connection, each ni-mh
The all corresponding first contactor of battery and a second contactor；The positive pole of Ni-MH battery passes through its corresponding first contactor
It is connected to the first end of heavy-current discharge resistance, the negative pole of Ni-MH battery is connected to high current by its corresponding second contactor
Second end of discharge resistance；The positive pole of Ni-MH battery can be connected with Ni-MH battery voltage detection module with negative pole with being energized；
ARM controller includes CAN terminal and control terminal, and CAN terminal is connect with Ni-MH battery voltage detection module, control terminal and first
The control terminal of catalyst and second contactor connects；ARM controller controls the corresponding first contactor of Ni-MH battery and second
During catalyst conducting, Ni-MH battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which Ni-MH battery is put with high current
Electric resistor coupled in parallel；Protection device includes D.C. contactor and resettable fuse, D.C. contactor and resettable fuse series connection
It is connected to the negative pole of Ni-MH battery group afterwards together；
Described Ni-MH battery is monomer Ni-MH battery or by multiple basic Ni-MH battery units simultaneously for basic Ni-MH battery unit
The Ni-MH battery brick that joint group becomes；
(2) the Ni-MH battery control system that step (1) is arranged is run according to following steps：
A. ARM controller is communicated with Ni-MH battery voltage detection module, obtains the voltage of each Ni-MH battery；
B. ARM controller, according to the N number of Ni-MH battery voltage obtaining, finds out the maximum Ni-MH battery of voltage, and wherein N is more than etc.
In 2；
C. ARM controller obtains the average voltage of all Ni-MH batteries；
D. when the voltage of the maximum Ni-MH battery of voltage and the average voltage deviations of all Ni-MH batteries are more than one and set threshold values
Jump into step e, otherwise return to step a；
E. ARM controller makes voltage by the maximum corresponding first contactor of Ni-MH battery of control voltage and second contactor
Maximum Ni-MH battery and heavy-current discharge resistor coupled in parallel, discharge to Ni-MH battery；
F. wait the time T of setting, ARM controller disconnects all contactless contactors, program return to step a by control terminal；
(3) complete the Ni-MH battery high current equilibrium that step (2) is realized controlling based on ARM.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610990840.6A CN106451655A (en) | 2016-11-11 | 2016-11-11 | Nickel-metal hydride battery large-current equalization method based on ARM control |
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| CN105846508A (en) * | 2016-05-22 | 2016-08-10 | 桂林理工大学 | Nickel-metal hydride battery large current equalization method based on single-chip microcomputer control |
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| CN105846508A (en) * | 2016-05-22 | 2016-08-10 | 桂林理工大学 | Nickel-metal hydride battery large current equalization method based on single-chip microcomputer control |
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Application publication date: 20170222 |