CN103792494B - Power management device of small electric vehicle - Google Patents
Power management device of small electric vehicle Download PDFInfo
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- CN103792494B CN103792494B CN201410029450.3A CN201410029450A CN103792494B CN 103792494 B CN103792494 B CN 103792494B CN 201410029450 A CN201410029450 A CN 201410029450A CN 103792494 B CN103792494 B CN 103792494B
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- circuit
- battery pack
- resistance
- communication interface
- voltage
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- 238000004891 communication Methods 0.000 claims abstract description 43
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000002955 isolation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a power management device of a small electric vehicle. The power management device comprises a liquid crystal display module, a main processor circuit, a second communication interface circuit, a first communication interface circuit, a bottom layer processor circuit, voltage monitoring circuits, current monitoring circuits and a battery pack. The battery pack comprises a plurality of batteries. The number of the voltage monitoring circuits is the same as the number of the batteries. Each voltage monitoring circuit is connected to the positive electrode and the negative electrode of the corresponding battery in a cross mode. The current monitoring circuits are connected to the battery pack in series. The output ends of the voltage monitoring circuits and the output ends of the current monitoring circuits are connected with corresponding input ends of the bottom layer processor circuit. The corresponding output end of the bottom layer processor circuit is further connected with the first communication interface circuit. Both the second communication interface circuit and the liquid crystal display module are connected with the main processor circuit. According to the power management device, the risk that performance of the whole battery pack is lowered is reduced, the service life of the whole battery pack is prolonged, system maintenance cost is reduced, and reliability of the whole vehicle is improved.
Description
Technical field
The invention belongs to battery condition monitoring technical field, more particularly, to a kind of small-sized electric vehicle power management dress
Put.
Background technology
At present in small-sized electric vehicle, widely used lead-acid battery group is powered, in real work, often due to system
Make, the factor such as aging, in a Battery pack group, usually have Individual cells and undertension, too low situation occur, can lead to total
Cell voltage declines, thus the electric current of battery pack increases, Long-Time Service can lead to the life-span of whole battery pack to decline.At present little
In type electric vehicle, do not take any measure to detect for each cell voltage of battery pack, can frequently result in whole electricity
Pond group service life reduction, increased the maintenance cost of car load.
Content of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of small-sized electric vehicle power management dress
Put, this device can provide warning message in advance such that it is able to change faulty battery in time, improves the work of whole battery pack
Life-span.
In order to realize above-mentioned purpose, present invention employs following technical scheme:
Small-sized electric vehicle power management device, including LCD MODULE, main processor circuit, the second communication interface electricity
Road, the first communication interface circuit, floor processor circuit, electric voltage observation circuit, current monitoring circuit and battery pack, described battery
Group includes some batteries, and the described quantity of electric voltage observation circuit is identical with the quantity of battery, on the both positive and negative polarity of every batteries
Bridge one group of electric voltage observation circuit, described current monitoring circuit is connected in series in battery pack, described electric voltage observation circuit and electric current are supervised
The output end of slowdown monitoring circuit is connected with the respective input of floor processor circuit respectively, described floor processor circuit accordingly defeated
Go out end to be also connected with the first communication interface circuit, described second communication interface circuit and LCD MODULE are all and primary processor
Circuit is connected, and described first communication interface and the second communication interface are connected by can bus, and realize floor processor circuit
Data transfer with main processor circuit；Described electric voltage observation circuit includes the first operational amplifier lmv344, Zener diode
D12, electric capacity c30, resistance r1 and resistance r29, described resistance r1 and resistance r29 series connection, and one end is connected to the positive pole of battery,
The other end is grounded；Described electric capacity c30 and Zener diode d12 is connected in parallel on resistance r29 respectively, described first operational amplifier
The in-phase input end of lmv344 is connected to the high level end of resistance r29, and the output end of described first operational amplifier lmv344 is even
It is connected to the respective input of floor processor circuit.
Preferably: the resistance of described resistance r1 is 450-650k, the resistance of described resistance r29 is 5-20k.Pass through
Big two resistance once of resistance one can carry out partial pressure to battery.
The present invention passes through to add a set of observation circuit in battery pack, the voltage and current of real-time detection each batteries group,
And compare with given threshold value, when voltage is long-term lower than the threshold voltage giving, system be given in display screen corresponding that
The warning message of one section, points out to need to change this batteries.When the electric current of battery is higher than the threshold current setting for a long time, point out
Need to detect full-vehicle control and drive system.By the monitoring of the voltage and current to battery pack, it is achieved thereby that to battery pack
Condition diagnosing, providing corresponding warning message in time, pointing out battery system or other system to be safeguarded, thus reducing whole
The risk that individual battery performance declines, improves the working life of whole battery pack, reduces system maintenance cost, improves car load
Reliability.
The present invention adopts double-layer structure, and the signal of communication interface transmission is digital quantity, can be carried out with relatively simple method
Isolation, thus can be very good to realize the isolation of power electric and weak electric signal.If bottom cell part is with man-machine interface part all
In same installing mechanism, need to connect more lead to battery pack, general battery pack from cockpit meter section farther out, needs
Want more tie, using the double-layer structure of the present invention, centre is coupled using communication bus, and the tie of needs is less, because
And connection lead can be reduced, and realize strong and weak electric isolution, decrease system cost, increased system reliability.
Brief description
Fig. 1 is the system block diagram of the present invention.
Fig. 2 is the circuit diagram of the electric voltage observation circuit of the present invention.
Fig. 3 is the circuit diagram of the current monitoring circuit of the present invention.
Fig. 4 is the circuit diagram of the multidiameter option switch circuit of the present invention.
Fig. 5 is the circuit diagram of the floor processor circuit of the present invention.
Fig. 6 is the circuit diagram of the main processor circuit of the present invention.
Fig. 7 is the circuit diagram of first, second communication interface circuit of the present invention.
Fig. 8 is the circuit diagram of the driving chip of LCD MODULE of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is made a detailed explanation.
Small-sized electric vehicle power management device as shown in Figure 1, including man-machine interface part 1 and bottom cell monitoring unit
Divide 2, man-machine interface part 1 is located at bridge instrumentation part, man-machine interface part 1 is responsible for realizing and bottom cell monitor portion 2
Data communication, obtain the status information of battery, and calculate in real time and display each economize on electricity cell voltage and battery pack 25 electric current,
Described man-machine interface part 1 includes LCD MODULE 11, main processor circuit 12 and the second communication interface circuit 13；Bottom electricity
Cell monitoring part 2 is located at battery pack 25 installation case portion and divides, and it is mainly responsible for realizing the sampling of cell voltage, electric current, line number of going forward side by side
Word, and by floor processor circuit 22, data is processed, then pass through communication interface and communicated with host computer；Institute
State bottom cell monitor portion 2 and include the first communication interface circuit 21, floor processor circuit 22, electric voltage observation circuit 23, electricity
Stream observation circuit 24 and battery pack 25, described battery pack 25 includes 16 batteries, the described quantity of electric voltage observation circuit 23 with
The quantity of battery is identical, and the both positive and negative polarity of every batteries bridges one group of electric voltage observation circuit 23, and described current monitoring circuit 24 is gone here and there
Be linked in battery pack 25, the output end of described electric voltage observation circuit 23 and current monitoring circuit 24 respectively with floor processor circuit
22 respective input is connected, and the corresponding output end of described floor processor circuit 22 is also connected with the first communication interface circuit 21
Connect, described second communication interface circuit 13 is all connected with main processor circuit 12 with LCD MODULE 11, described first leads to
Communication interface 21 and the second communication interface 13 are connected by can bus, and realize floor processor circuit 22 and main processor circuit
12 data transfer.
Electric voltage observation circuit 23 as shown in Figure 2, including the first operational amplifier lmv344, Zener diode d12, electric capacity
C30, resistance r1 and resistance r29, the resistance of described resistance r1 is 500k ω, and the resistance of described resistance r29 is 10k ω, by resistance
Big two resistance once of value one carry out partial pressure to battery.Described resistance r1 and resistance r29 series connection, and one end is connected to battery
Positive pole, the other end be grounded；Described electric capacity c30 and Zener diode d12 is connected in parallel on resistance r29 respectively, described first computing
The in-phase input end of amplifier lmv344 is connected to the high level end of resistance r29, and described first operational amplifier lmv344's is defeated
Go out the respective input that end is connected to floor processor circuit 22.Voltage detecting is using the testing circuit of low cost, accuracy of detection
Height, low cost, good reliability.
Current monitoring circuit 24 as shown in Figure 3, including resistance ri, electric capacity ci and the second operational amplifier lmv344, institute
State resistance ri and be connected in series in the middle of the main branch of battery pack, described electric capacity ci is in parallel with resistance ri, described second operational amplifier
The in-phase input end of lmv344 is connected to the high level end of resistance ri, and the output end of described second operational amplifier lmv344 connects
Respective input to bottom processor circuit 22.
Floor processor circuit 22 as shown in Figure 4, Figure 5, including multidiameter option switch circuit and floor processor, described
Multidiameter option switch circuit adopts cd74hc4067 chip, 16 input pins of cd74hc4067 chip and 16 groups of voltage monitorings
The output end of the first operational amplifier lmv344 of circuit 23 connects respectively, 1 output pin of cd74hc4067 chip and bottom
The respective pins of layer processor circuit 22 are connected, and described floor processor adopts stm32f103rbt6 chip,
The 14 of stm32f103rbt6 chip, No. 15 pin output pin and the second operational amplifiers with cd74hc4067 chip respectively
The output end of lmv344 is connected, No. 8 of stm32f103rbt6 chip, No. 9, No. 10 and No. 11 pins respectively with cd74hc4067
No. 10 of chip, No. 11, No. 14 are connected with No. 13 pins, realize the function that multi-analog selects.
Main processor circuit 12 as shown in Fig. 6, Fig. 8 adopts stm32f103vbt6 chip, and this chip has can communication
Interface, and there is more io interface, it is capable of the interface of can communication and liquid crystal display, the drive of LCD MODULE 11
Dynamic chip meets the use of most conventional liquid crystal, and the second communication interface circuit 13 adopts iso1050 chip, described
The 97 of stm32f103vbt6 chip, No. 98 pins, 1-5 pin, 28-46 pin, 82-86 pin all for liquid crystal
The respective pins of the driving chip of display module 11 are connected, and realize liquid crystal display；No. 70 of described stm32f103vbt6 chip,
No. 2 of No. 71 pins and iso1050 chip, No. 3 pins be connected, realize main processor circuit 12 and the second communication interface circuit 13
Connection and its data communication.
First communication interface circuit 21 as shown in Figure 7 and the second communication interface circuit 13, should all using iso1050 chip
Chip has voltage isolation features, mutually isolated between No. 2, No. 3 pins and No. 6, No. 7 pins, it is achieved thereby that can communication connects
The information isolation transmission of mouth is it is achieved that the power electric circuit of lower floor's battery is communicated with the light current on upper strata.First communication interface circuit
No. 2 of iso1050 chip in 21, No. 3 pins respectively with No. 45 of stm32f103rbt6 chip, No. 44 pins be connected, realize
The connection of floor processor circuit 22 and the first communication interface circuit 21 and its data communication；In second communication interface circuit 13
No. 2 of iso1050 chip, No. 3 pins respectively with No. 70 of stm32f103vbt6 chip, No. 71 pins be connected, realize main process task
The connection of device circuit 12 and the second communication interface circuit 13 and its data communication, the iso1050 in the first communication interface circuit 21
No. 6 of iso1050 chip in No. 6 of chip, No. 7 pins and the second communication interface circuit 13, No. 7 pins pass through can bus
It is connected, realize the data transfer of floor processor circuit 22 and main processor circuit 12.
Claims (2)
1. small-sized electric vehicle power management device it is characterised in that: include LCD MODULE (11), main processor circuit
(12), the second communication interface circuit (13), the first communication interface circuit (21), floor processor circuit (22), voltage monitoring electricity
Road (23), current monitoring circuit (24) and battery pack (25), described battery pack (25) includes some batteries, and described voltage is supervised
The quantity of slowdown monitoring circuit (23) is identical with the quantity of battery, and the both positive and negative polarity of every batteries bridges one group of electric voltage observation circuit (23),
Described current monitoring circuit (24) is connected in series in battery pack (25), described electric voltage observation circuit (23) and current monitoring circuit (24)
Output end be connected with the respective input of floor processor circuit (22) respectively, described floor processor circuit (22) corresponding
Output end is also connected with the first communication interface circuit (21), described second communication interface circuit (13) and LCD MODULE
(11) all it is connected with main processor circuit (12), described first communication interface circuit (21) and the second communication interface circuit (13)
Connected by can bus, and realize the data transfer of floor processor circuit (22) and main processor circuit (12)；Described voltage
Observation circuit (23) includes the first operational amplifier lmv344, Zener diode d12, electric capacity c30, resistance r1 and resistance r29, institute
State resistance r1 and resistance r29 series connection, and one end is connected to the positive pole of battery, the other end is grounded；Described electric capacity c30 and voltage stabilizing two
Pole pipe d12 is connected in parallel on resistance r29 respectively, and the in-phase input end of described first operational amplifier lmv344 is connected to resistance r29
High level end, the output end of described first operational amplifier lmv344 is connected to the corresponding input of floor processor circuit (22)
End；
Described electric voltage observation circuit (23) and current monitoring circuit (24) are capable of voltage and the electricity of each batteries of real-time detection (25)
Stream, and compare with given threshold value, when voltage is long-term lower than the threshold voltage giving, system is in LCD MODULE (11)
Provide the warning message of that section corresponding, point out to need to change this batteries；When the electric current of battery is higher than the threshold setting for a long time
During value electric current, point out to need to detect full-vehicle control and drive system；By the monitoring of the voltage and current to battery pack (25), from
And achieve the condition diagnosing to battery pack (25), provide corresponding warning message in time, point out battery pack (25) is tieed up
Shield, thus reducing the risk of whole battery pack (25) hydraulic performance decline, improves the working life of whole battery pack (25), reduces and safeguards
Cost, improves reliability.
2. small-sized electric vehicle power management device according to claim 1 it is characterised in that: the resistance of described resistance r1
For 450-650k ω, the resistance of described resistance r29 is 5-20k ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029450.3A CN103792494B (en) | 2014-01-22 | 2014-01-22 | Power management device of small electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029450.3A CN103792494B (en) | 2014-01-22 | 2014-01-22 | Power management device of small electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN103792494A CN103792494A (en) | 2014-05-14 |
| CN103792494B true CN103792494B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410029450.3A Expired - Fee Related CN103792494B (en) | 2014-01-22 | 2014-01-22 | Power management device of small electric vehicle |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106828110A (en) * | 2017-03-03 | 2017-06-13 | 镇江海姆霍兹传热传动系统有限公司 | Vehicle high-voltage bus safety protector |
| GB2561558B (en) * | 2017-04-13 | 2019-10-16 | De Innovation Lab Ltd | Electrical vehicle information system and method of operation |
Citations (6)
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|---|---|---|---|---|
| CN101078750A (en) * | 2007-06-28 | 2007-11-28 | 中国科学院电工研究所 | Vehicle mounted battery monitor system |
| CN101576584A (en) * | 2008-05-09 | 2009-11-11 | 李尔公司 | Voltage measurement of high voltage batteries for hybrid and electric vehicles |
| CN201345393Y (en) * | 2008-11-25 | 2009-11-11 | 北京市电力公司 | Battery monitoring system used in electric automobile battery charger |
| CN102928784A (en) * | 2012-10-17 | 2013-02-13 | 徐方林 | Storage battery pack data logger |
| CN202939289U (en) * | 2012-10-29 | 2013-05-15 | 中国南方电网有限责任公司调峰调频发电公司 | Battery pack health state evaluation system |
| CN203673044U (en) * | 2014-01-22 | 2014-06-25 | 浙江精雷电器有限公司 | Small electric vehicle power management device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100846710B1 (en) * | 2006-09-07 | 2008-07-16 | 삼성에스디아이 주식회사 | Battery Management System and Its Driving Method |
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2014
- 2014-01-22 CN CN201410029450.3A patent/CN103792494B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078750A (en) * | 2007-06-28 | 2007-11-28 | 中国科学院电工研究所 | Vehicle mounted battery monitor system |
| CN101576584A (en) * | 2008-05-09 | 2009-11-11 | 李尔公司 | Voltage measurement of high voltage batteries for hybrid and electric vehicles |
| CN201345393Y (en) * | 2008-11-25 | 2009-11-11 | 北京市电力公司 | Battery monitoring system used in electric automobile battery charger |
| CN102928784A (en) * | 2012-10-17 | 2013-02-13 | 徐方林 | Storage battery pack data logger |
| CN202939289U (en) * | 2012-10-29 | 2013-05-15 | 中国南方电网有限责任公司调峰调频发电公司 | Battery pack health state evaluation system |
| CN203673044U (en) * | 2014-01-22 | 2014-06-25 | 浙江精雷电器有限公司 | Small electric vehicle power management device |
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| CN103792494A (en) | 2014-05-14 |
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| CB02 | Change of applicant information |
Address after: Ring road 313201 Zhejiang city in Huzhou Province, Deqing County Town, No. 58 Applicant after: ZHEJIANG JINGLEI COMPRESSOR CO., LTD. Address before: 313201, Deqing, 58, Ring North Road, Deqing, Zhejiang, Huzhou Applicant before: ZHEJIANG KINGLEO ELECTRICAL APPLIANCES CO., LTD. |
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Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG KING LEO ELECTRONICS CO., LTD. TO: ZHEJIANG KINGLEO ELECTRICAL APPLIANCES CO., LTD. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Power management device of small electric vehicle Effective date of registration: 20170927 Granted publication date: 20170125 Pledgee: Zhejiang Deqing rural commercial bank Limited by Share Ltd Pledgor: ZHEJIANG JINGLEI COMPRESSOR CO., LTD. Registration number: 2017980000387 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20210122 |