CN107244260A - The lead-acid battery management system and control method of a kind of dead slow speed four-wheel electric motor car - Google Patents
The lead-acid battery management system and control method of a kind of dead slow speed four-wheel electric motor car Download PDFInfo
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- CN107244260A CN107244260A CN201710560967.9A CN201710560967A CN107244260A CN 107244260 A CN107244260 A CN 107244260A CN 201710560967 A CN201710560967 A CN 201710560967A CN 107244260 A CN107244260 A CN 107244260A
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- 239000002253 acid Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims description 17
- 238000009966 trimming Methods 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 7
- 238000012886 linear function Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a kind of lead-acid battery management system of dead slow speed four-wheel electric motor car, including：Voltage sample module, the magnitude of voltage for gathering cell；PIC single chip microcomputer, is connected with voltage sample module, obtains the magnitude of voltage of cell；Balance module, is connected with PIC single chip microcomputer, and the PIC sends the electricity between pulse signal, the balanced each battery of control balance module to balance module；The balance module includes and cell quantity identical monomer equalizing circuit, the monomer equalizing circuit includes drive circuit and discharge circuit, the drive circuit includes band resistance triode, the lead-acid battery management system and its control method of this dead slow speed four-wheel electric motor car are targetedly discharged corresponding battery according to the pressure difference between cell, adjust the capacity difference between them, make each cell in the lead-acid battery of series connection with the increase of charging times, performance difference maintain it is less within the scope of, slow down the decrease speed of battery capacity.
Description
Technical field
The present invention relates to the lead-acid battery management system in cell balancing field, more particularly to a kind of dead slow speed four-wheel electric motor car
System and control method.
Background technology
Lead-acid accumulator is widely used to every field, such as uninterrupted power source（UPS）, electric supply, communication electricity
Source, the electric vehicle occurred in recent years such as electric bicycle, battery-operated motor cycle, electrocar etc. are many also to use lead acid storage battery
Pond, electric vehicle is needed to the frequent discharge and recharge of battery, and the performance to battery proposes higher requirement, also sends out the performance of battery
The limit is waved.With the increase of charging times, the poor performance opposite sex of each cell in lead-acid battery of connecting is increasingly
Greatly, some batteries are not filled, and some batteries overcharge, and continuing development causes series-connected cell pool-size rapid decrease, longevity
Life termination.
The content of the invention
The technical problem to be solved in the present invention is：For each cell in the lead-acid battery of series connection with charging time
Several increases, performance difference is increasing, the problem of causing battery capacity rapid decrease, and the invention provides a kind of dead slow speed four
The lead-acid battery management system and control method of electric car is taken turns to solve the above problems.
The technical solution adopted for the present invention to solve the technical problems is：A kind of lead-acid battery pipe of dead slow speed four-wheel electric motor car
Reason system, including：
Voltage sample module, the magnitude of voltage for gathering cell；
PIC single chip microcomputer, is connected with voltage sample module, obtains the magnitude of voltage of cell；
Balance module, is connected with PIC single chip microcomputer, and the PIC sends pulse signal to balance module, and control balance module is balanced each
Electricity between battery；The balance module includes and cell quantity identical monomer equalizing circuit, the monomer equilibrium
Circuit includes drive circuit and discharge circuit, and the drive circuit includes band resistance triode, and the discharge circuit includes optical coupling
Device, light emitting diode, first resistor, fuse and metal-oxide-semiconductor, the base stage of the band resistance triode are connected with PIC single chip microcomputer, current collection
The positive pole connection of pole and photo-coupler, one end of the first resistor respectively with the positive pole of cell and photo-coupler
Colelctor electrode is connected, and the source electrode of the metal-oxide-semiconductor is connected with the negative pole of this cell, the other end of the first resistor and insurance
One end connection of silk, the other end of the fuse and the drain electrode of metal-oxide-semiconductor are connected, the positive pole and optocoupler of the light emitting diode
The colelctor electrode connection of clutch, the drain electrode connection of negative pole and metal-oxide-semiconductor, the grid of the metal-oxide-semiconductor and the emitter stage of photo-coupler are connected；
Power module, is connected with voltage sample module, PIC single chip microcomputer and balance module and is powered for them.
Preferably, the voltage sample module includes analog switch chip, amplifying circuit and Acquisition Circuit, each monomer
Battery is connected with an Acquisition Circuit, and the Acquisition Circuit includes the first diode, second resistance and 3rd resistor, described
The positive pole of one end of second resistance and cell is connected, the other end of the second resistance, the first diode negative pole with
And one end of 3rd resistor is connected to same node, an input of the analog switch chip is connected with this node, described
The positive pole of first diode and the other end connection of 3rd resistor are followed by simulation ground, the analog switch chip output end and institute
The in-phase end connection of amplifying circuit is stated, the output end of the amplifying circuit is connected with PIC single chip microcomputer, the analog switch chip
Multiple selection ends are connected with the PIC single chip microcomputer.
Preferably, also including CAN transceiver, the PIC single chip microcomputer is connected by CAN transceiver with vehicle control device.
Preferably, also including being arranged on the temperature sensor at cell, the temperature sensor and PIC single chip microcomputer
Connection.
Present invention also offers a kind of control method of the lead-acid battery management system of dead slow speed four-wheel electric motor car, including it is following
Step：
The first trimming threshold Vb, the second trimming threshold Vb1, the 3rd trimming threshold Vb2 and duty are preset with S1, PIC single chip microcomputer
Than base value d0, wherein d0 is the positive number less than 1 and more than 0；
S2, the magnitude of voltage Va of voltage sample module collection cell simultaneously input the PIC single chip microcomputer；
A minimum magnitude of voltage Va cell as with reference to battery M, its magnitude of voltage is designated as by S3, PIC single chip microcomputer
Vmin；
S4, the magnitude of voltage of all cells in addition to reference to battery M is compared with magnitude of voltage Vmin respectively：When a list
Magnitude of voltage Va-Vmin≤Vb of body battery, the then pwm signal that PIC single chip microcomputer is exported to the monomer equalizing circuit of the cell
Dutycycle d=0；
As Vb ＜ Va-Vmin≤Vb1, dutycycle d=d0；
As Vb1 ＜ Va-Vmin≤Vb2, dutycycle d=k* Vmin+d0, d is linear function, and k is positive number；
As Vb2 ＜ Va-Vmin, dutycycle d=1.
Preferably, in step s 4, as Vb2 ＜ Va-Vmin, PIC single chip microcomputer generation alarm signal is simultaneously sent to car
Controller.
Preferably, the PIC single chip microcomputer connects through the temperature that temperature sensor gathers cell, work as cell
Temperature sends alarm signal when exceeding temperature threshold to vehicle control device.
The beneficial effects of the invention are as follows the lead-acid battery management system and its control method root of this dead slow speed four-wheel electric motor car
Targetedly corresponding battery is discharged according to the pressure difference between cell, the capacity difference between them is adjusted, makes series connection
Lead-acid battery in each cell with the increase of charging times, performance difference maintain it is less within the scope of, subtract
The decrease speed of slow battery capacity.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the voltage sample mould of the optimum embodiment of the lead-acid battery management system of the dead slow speed four-wheel electric motor car of the present invention
Block and the circuit structure distribution map of temperature sampling part.
Fig. 2 is the balance module of the optimum embodiment of the lead-acid battery management system of the dead slow speed four-wheel electric motor car of the present invention
Circuit structure distribution map.
Fig. 3 is the PIC single chip microcomputer of the optimum embodiment of the lead-acid battery management system of the dead slow speed four-wheel electric motor car of the present invention
Partial circuit structure distribution map.
Fig. 4 is the CAN transceiver of the optimum embodiment of the lead-acid battery management system of the dead slow speed four-wheel electric motor car of the present invention
Partial circuit structure distribution map.
Fig. 5 is the power module of the optimum embodiment of the lead-acid battery management system of the dead slow speed four-wheel electric motor car of the present invention
Circuit structure distribution map.
Fig. 6 is the optimum embodiment of the control method of the lead-acid battery management system of the dead slow speed four-wheel electric motor car of the present invention
Flow chart.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axial direction ",
The orientation or position relationship of the instructions such as " radial direction ", " circumference " are based on orientation shown in the drawings or position relationship, merely to just
In the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important
Property.In the description of the invention, it is necessary to which explanation, unless otherwise clearly defined and limited, term " connected ", " connection " should
It is interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary.For the common of this area
For technical staff, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.In addition, in description of the invention
In, unless otherwise indicated, " multiple " are meant that two or more.
Any process described otherwise above or method description are construed as in flow chart or herein, represent to include
Module, fragment or the portion of the code of one or more executable instructions for the step of realizing specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown or discussion suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
As shown in Fig. 1 ~ 5, the invention provides a kind of lead-acid battery management system of dead slow speed four-wheel electric motor car, including：
Voltage sample module, the magnitude of voltage for gathering cell；Including analog switch chip U1, amplifying circuit and collection electricity
In road, this example, the 12V plumbic acid cells of four series connection are included in battery pack altogether, the anodic potentials of the first batteries are
48V, the negative pole current potential of final section battery is 0, equivalent to simulation ground SGND；What therefore analog switch chip U1 was used 8 selects 1 type
Analog switch chip, model 74HC4051A；Each cell is connected with an Acquisition Circuit, and Acquisition Circuit includes first
Diode D1, second resistance R2 and 3rd resistor R3, second resistance R2 one end are connected with the positive pole of a cell, and second
One end of resistance R2 other end, the first diode D1 negative pole and 3rd resistor R3 is connected to same node, and simulation is opened
An input for closing chip is connected with this node, after the first diode D1 positive pole is connected with 3rd resistor R3 other end
Simulation ground SGND is met, amplifying circuit includes operational amplifier, the in-phase end of operational amplifier and analog switch chip U1 output
End connection, out-phase termination simulation ground SGND；
PIC single chip microcomputer U2, is connected with voltage sample module, obtains the magnitude of voltage of cell；In this example, PIC single chip microcomputer U2
Model pic18f25k80, three of analog switch chip U1 selection ends are connected with PIC single chip microcomputer U2, operational amplifier
Output end is connected with PIC single chip microcomputer U2；
Balance module, is connected with PIC single chip microcomputer, and PIC sends pulse signal, the balanced each battery of control balance module to balance module
Between electricity；Balance module includes 4 monomer equalizing circuits, and monomer equalizing circuit includes drive circuit and discharge circuit, drives
Dynamic circuit includes band resistance triode Q1, and discharge circuit includes photo-coupler U3, light emitting diode D2, first resistor R1, fuse
F1 and metal-oxide-semiconductor Q2, photo-coupler U3 model EL357；Base stage with resistance triode Q1 passes through a resistance and PIC single chip microcomputer U2
Connection, colelctor electrode is connected with photo-coupler U3 positive pole by a resistance and connects VCC5V power supplys by a resistance, and emitter stage passes through
One resistance meets simulation SGND；Photo-coupler U3 negative pole is grounded GND and a capacitor is connected between positive pole, the first electricity
The positive pole for hindering R1 one end difference, the positive pole of cell, photo-coupler U3 colelctor electrode and light emitting diode D2 connects
Same node is connected on, first resistor R1 other end is connected with fuse F1 one end, metal-oxide-semiconductor Q2 source electrode and this monomer electricity
The negative pole connection in pond, fuse F1 other end is connected with metal-oxide-semiconductor Q2 drain electrode, and light emitting diode D2 negative pole passes through an electricity
Resistance is connected with metal-oxide-semiconductor Q2 drain electrode, and metal-oxide-semiconductor Q2 grid is connected by a resistance with photo-coupler U3 emitter stage, metal-oxide-semiconductor Q2
Source electrode and grid between be connected with a resistance；It is balanced with the monomer that the first batteries are connected due to being series connection between cell
The metal-oxide-semiconductor Q2 of circuit source electrode is not only the negative pole for being connected to the first batteries, is also the positive pole for being connected to the second batteries；
Power module, is connected with voltage sample module, PIC single chip microcomputer and balance module and is powered for them, power circuit bag
Include：
Model MP4560 decompression shape power supply changeover device U4, inputs 48V power supplys, exports VCC12V；
Model MIC5233-5.0BM5 decompression chip U5, inputs VCC12V, exports VCC5V；
Model ICL7660S reversion power supply changeover device U6, inputs VCC5V, output -5V；
CAN transceiver U7, model TJA1041AT, PIC single chip microcomputer is connected by CAN transceiver with vehicle control device, and CAN is received
Send out Enable Pins of the device U7 also with being depressured chip U5；
Temperature sensor U8, is arranged at cell, and temperature sensor is connected with PIC single chip microcomputer.
As shown in fig. 6, present invention also offers a kind of controlling party of the lead-acid battery management system of dead slow speed four-wheel electric motor car
Method, comprises the following steps：
The first trimming threshold Vb, the second trimming threshold Vb1, the 3rd trimming threshold Vb2 and duty are preset with S1, PIC single chip microcomputer
Than base value d0, wherein d0 is the positive number less than 1 and more than 0；
S2, the magnitude of voltage Va of voltage sample module collection cell simultaneously input PIC single chip microcomputer；
A minimum magnitude of voltage Va cell as with reference to battery M, its magnitude of voltage is designated as by S3, PIC single chip microcomputer
Vmin；
S4, the magnitude of voltage of all cells in addition to reference to battery M is compared with magnitude of voltage Vmin respectively：When a list
Magnitude of voltage Va-Vmin≤Vb of body battery, the then pwm signal that PIC single chip microcomputer is exported to the monomer equalizing circuit of the cell
Dutycycle d=0；
As Vb ＜ Va-Vmin≤Vb1, dutycycle d=d0；
As Vb1 ＜ Va-Vmin≤Vb2, dutycycle d=k* Vmin+d0, d is linear function, and k is positive number, such as d=0.05*
Vmin +d0；
As Vb2 ＜ Va-Vmin, dutycycle d=1, PIC single chip microcomputer generation alarm signal is simultaneously sent to vehicle control device；
S5, PIC single chip microcomputer connect through the temperature that temperature sensor gathers cell, when cell temperature exceedes temperature threshold
During value alarm signal is sent to vehicle control device.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of the term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (7)
1. a kind of lead-acid battery management system of dead slow speed four-wheel electric motor car, it is characterised in that including：
Voltage sample module, the magnitude of voltage for gathering cell；
PIC single chip microcomputer, is connected with voltage sample module, obtains the magnitude of voltage of cell；
Balance module, is connected with PIC single chip microcomputer, and the PIC sends pulse signal to balance module, and control balance module is balanced each
Electricity between battery；The balance module includes and cell quantity identical monomer equalizing circuit, the monomer equilibrium
Circuit includes drive circuit and discharge circuit, and the drive circuit includes band resistance triode, and the discharge circuit includes optical coupling
Device, light emitting diode, first resistor, fuse and metal-oxide-semiconductor, the base stage of the band resistance triode are connected with PIC single chip microcomputer, current collection
The positive pole connection of pole and photo-coupler, one end of the first resistor respectively with the positive pole of cell and photo-coupler
Colelctor electrode is connected, and the source electrode of the metal-oxide-semiconductor is connected with the negative pole of this cell, the other end of the first resistor and insurance
One end connection of silk, the other end of the fuse and the drain electrode of metal-oxide-semiconductor are connected, the positive pole and optocoupler of the light emitting diode
The colelctor electrode connection of clutch, the drain electrode connection of negative pole and metal-oxide-semiconductor, the grid of the metal-oxide-semiconductor and the emitter stage of photo-coupler are connected；
Power module, is connected with voltage sample module, PIC single chip microcomputer and balance module and is powered for them.
2. the lead-acid battery management system of dead slow speed four-wheel electric motor car as claimed in claim 1, it is characterised in that：The voltage is adopted
Egf block includes analog switch chip, amplifying circuit and Acquisition Circuit, and each cell is connected with an Acquisition Circuit,
The Acquisition Circuit includes the first diode, second resistance and 3rd resistor, one end of the second resistance and cell
Positive pole is connected, and one end of the other end of the second resistance, the negative pole of the first diode and 3rd resistor is connected to same
Node a, input of the analog switch chip is connected with this node, the positive pole and 3rd resistor of first diode
Other end connection be followed by simulation ground, the analog switch chip output end is connected with the in-phase end of the amplifying circuit, institute
The output end for stating amplifying circuit is connected with PIC single chip microcomputer, multiple selection ends and the PIC single chip microcomputer of the analog switch chip
Connection.
3. the lead-acid battery management system of dead slow speed four-wheel electric motor car as claimed in claim 2, it is characterised in that：Also include CAN
Transceiver, the PIC single chip microcomputer is connected by CAN transceiver with vehicle control device.
4. the lead-acid battery management system of dead slow speed four-wheel electric motor car as claimed in claim 3, it is characterised in that：Also include setting
Temperature sensor at cell, the temperature sensor is connected with PIC single chip microcomputer.
5. a kind of controlling party of the lead-acid battery management system of dead slow speed four-wheel electric motor car as described in any one of claim 1 ~ 4
Method, it is characterised in that comprise the following steps：
The first trimming threshold Vb, the second trimming threshold Vb1, the 3rd trimming threshold Vb2 and duty are preset with S1, PIC single chip microcomputer
Than base value d0, wherein d0 is the positive number less than 1 and more than 0；
S2, the magnitude of voltage Va of voltage sample module collection cell simultaneously input the PIC single chip microcomputer；
A minimum magnitude of voltage Va cell as with reference to battery M, its magnitude of voltage is designated as by S3, PIC single chip microcomputer
Vmin；
S4, the magnitude of voltage of all cells in addition to reference to battery M is compared with magnitude of voltage Vmin respectively：When a list
Magnitude of voltage Va-Vmin≤Vb of body battery, the then pwm signal that PIC single chip microcomputer is exported to the monomer equalizing circuit of the cell
Dutycycle d=0；
As Vb ＜ Va-Vmin≤Vb1, dutycycle d=d0；
As Vb1 ＜ Va-Vmin≤Vb2, dutycycle d=k* Vmin+d0, d is linear function, and k is positive number；
As Vb2 ＜ Va-Vmin, dutycycle d=1.
6. control method as claimed in claim 5, it is characterised in that：In step s 4, as Vb2 ＜ Va-Vmin, PIC is mono-
Piece machine generates alarm signal and sent to vehicle control device.
7. control method as claimed in claim 6, it is characterised in that：The PIC single chip microcomputer connects through temperature sensor and adopted
Collect the temperature of cell, alarm signal is sent to vehicle control device when cell temperature exceedes temperature threshold.
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| CN201710560967.9A CN107244260B (en) | 2017-07-11 | 2017-07-11 | Lead-acid battery management system and control method for micro-speed four-wheel electric vehicle |
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| CN201710560967.9A CN107244260B (en) | 2017-07-11 | 2017-07-11 | Lead-acid battery management system and control method for micro-speed four-wheel electric vehicle |
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| CN107244260B CN107244260B (en) | 2024-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123780A (en) * | 2019-12-23 | 2020-05-08 | 北京海博思创科技有限公司 | Number configuration method and device, electronic equipment and storage medium |
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| CN205070464U (en) * | 2012-11-14 | 2016-03-02 | 魏世民 | Group battery management system |
| CN203278321U (en) * | 2013-05-16 | 2013-11-06 | 浙江吉利汽车研究院有限公司杭州分公司 | Battery voltage equalization circuit |
| CN103730935A (en) * | 2013-12-30 | 2014-04-16 | 广东志成冠军集团有限公司 | Equalization circuit for allowing electric energy of lithium batteries to be uniform |
| CN106300546A (en) * | 2016-09-26 | 2017-01-04 | 绍兴文理学院 | A kind of isolation equalizing circuit for battery management system and equalization methods |
| CN207328167U (en) * | 2017-07-11 | 2018-05-08 | 浙江大学常州工业技术研究院 | A kind of lead-acid battery management system of dead slow speed four-wheel electric motor car |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111123780A (en) * | 2019-12-23 | 2020-05-08 | 北京海博思创科技有限公司 | Number configuration method and device, electronic equipment and storage medium |
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