CN103792493B - Small-sized electric vehicle power supply protector - Google Patents
Small-sized electric vehicle power supply protector Download PDFInfo
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- CN103792493B CN103792493B CN201410029354.9A CN201410029354A CN103792493B CN 103792493 B CN103792493 B CN 103792493B CN 201410029354 A CN201410029354 A CN 201410029354A CN 103792493 B CN103792493 B CN 103792493B
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- 230000001012 protector Effects 0.000 title claims abstract description 8
- 230000000875 corresponding Effects 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 238000002955 isolation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910004682 ON-OFF Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Abstract
nullThe present invention relates to a kind of small-sized electric vehicle power supply protector，Including LCD MODULE、Main processor circuit、Second communication interface circuit、First communication interface circuit、Floor processor circuit、Electric voltage observation circuit、Current monitoring circuit and set of cells，Set of cells includes some batteries，The quantity of electric voltage observation circuit is identical with the quantity of battery，One group of electric voltage observation circuit is bridged on the both positive and negative polarity of every batteries，Current monitoring circuit is connected in series in set of cells，The outfan of electric voltage observation circuit and current monitoring circuit respective input with floor processor circuit respectively is connected，The corresponding output end of floor processor circuit is also connected with the first communication interface circuit，Second communication interface circuit is all connected with main processor circuit with LCD MODULE，The present invention reduces the risk that whole battery performance declines，Improve the working life of whole set of cells,Reduce system maintenance cost，Improve the reliability of car load.
Description
Technical field
The invention belongs to battery condition monitoring technical field, particularly relate to a kind of small-sized electric vehicle power supply protector.
Background technology
At present in small-sized electric vehicle, widely used lead-acid battery group is powered, in real work, often due to manufacture, always
The factors such as change, in a Battery pack group, usually have Individual cells and undertension, too low situation occur, can cause total battery
Voltage declines, thus the electric current of set of cells strengthens, and life-time service can cause the life-span of whole set of cells to decline.At present in small electrical
In motor-car, cell voltage each for set of cells does not take any measure to detect, and can frequently result in the whole set of cells longevity
Life reduces, and adds the maintenance cost of car load.
Summary 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 supply protector, this protection
Device can provide warning message in advance such that it is able to changes out of order battery in time, improves the working life of whole set of cells.
In order to realize above-mentioned purpose, present invention employs following technical scheme:
Small-sized electric vehicle power supply protector, including LCD MODULE, main processor circuit, the second communication interface circuit,
One communication interface circuit, floor processor circuit, electric voltage observation circuit, current monitoring circuit and set of cells, described battery pack
Including some batteries, the quantity of described electric voltage observation circuit is identical with the quantity of battery, and the both positive and negative polarity of every batteries bridges one
Group electric voltage observation circuit, described current monitoring circuit is connected in series in set of cells, described electric voltage observation circuit and current monitoring circuit
Outfan respective input with floor processor circuit respectively is connected, and the corresponding output end of described floor processor circuit is also with
One communication interface circuit is connected, and described second communication interface circuit is all connected with main processor circuit with LCD MODULE,
Described first communication interface circuit and the second communication interface circuit are connected by CAN, and realize floor processor circuit with
The data transmission of main processor circuit；Main processor circuit uses STM32F103VBT6 chip, the driving of LCD MODULE
Chip uses TFT_LCD chip, the second communication interface circuit to use ISO1050 chip, described STM32F103VBT6 core
The 97 of sheet, No. 98 pins, 1-5 pin, 28-46 pin, 82-86 pin all for the driving of LCD MODULE
The respective pins of dynamic chip is connected, it is achieved liquid crystal display；No. 70 and ISO1050 of described STM32F103VBT6 chip
No. 2 of chip are connected, and No. 71 pins of STM32F103VBT6 chip are connected real with No. 3 pins of ISO1050 chip
Show main processor circuit and the connection of the second communication interface circuit and data communication thereof.
The present invention by adding a set of observation circuit in set of cells, detects the voltage and current of each batteries group in real time, and with give
Relatively, when voltage is lower than given threshold voltage for a long time, system provides report of that joint corresponding in display screen to fixed threshold ratio
Alarming information, prompting needs to change this batteries.When the electric current of battery is for a long time higher than the threshold current set, prompting needs detection
Full-vehicle control and drive system.By the monitoring of the voltage and current to set of cells, it is achieved thereby that the state of set of cells is examined
Disconnected, provide corresponding warning message in time, battery system or other system are safeguarded, thus are reduced whole set of cells by prompting
The risk of hydraulic performance decline, improves the working life of whole set of cells, reduces system maintenance cost, improves the reliability of car load.
The present invention uses double-layer structure, and the signal that communication interface transmits is digital quantity, can isolate by relatively simple method,
Thus the isolation of power current and weak electric signal can well be realized.If bottom cell part is all located at same with man-machine interface part
In installing mechanism, needing to connect more lead-in wire to set of cells, general set of cells from cockpit meter section farther out, needs more
Tie, uses the double-layer structure of the present invention, middle use communication bus to couple, and the tie of needs is less, it is thus possible to subtract
Couple lead-in wire less, and realize strong and weak electricity isolation, decrease system cost, add system reliability.
Accompanying drawing explanation
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 the LCD MODULE of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is made a detailed explanation.
Small-sized electric vehicle power supply protector as shown in Figure 1, including man-machine interface part 1 and bottom cell monitor portion 2,
Man-machine interface part 1 is positioned at bridge instrumentation part, and man-machine interface part 1 is responsible for realizing the number with bottom cell monitor portion 2
According to communication, obtain the status information of battery, and calculate in real time and show each batteries voltage and the electric current of set of cells 25, institute
State man-machine interface part 1 and include LCD MODULE 11, main processor circuit 12 and the second communication interface circuit 13；Bottom electricity
Cell monitoring part 2 is positioned at set of cells 25 and installs case part, its sampling being mainly responsible for realizing cell voltage, electric current, and carries out
Digitized, and by floor processor circuit 22, data are processed, then pass through communication interface and lead to host computer
News；Described bottom cell monitor portion 2 includes the first communication interface circuit 21, floor processor circuit 22, voltage monitoring electricity
Road 23, current monitoring circuit 24 and set of cells 25, described set of cells 25 includes 16 batteries, described electric voltage observation circuit
The quantity of 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, and described electric current is supervised
Slowdown monitoring circuit 24 is connected in series in set of cells 25, the outfan of described electric voltage observation circuit 23 and current monitoring circuit 24 respectively with the end
The respective input of layer processor circuit 22 is connected, and the corresponding output end of described floor processor circuit 22 also connects with the first communication
Mouth circuit 21 is connected, and described second communication interface circuit 13 is all connected with main processor circuit 12 with LCD MODULE 11
Connecing, described first communication interface circuit 21 and the second communication interface circuit 13 are connected by CAN, and realize at bottom
Reason device circuit 22 transmits with the data of main processor circuit 12.
Electric voltage observation circuit 23 as shown in Figure 2, including the first operational amplifier LMV344, Zener diode D12, electricity
Holding 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, carries out dividing potential drop by big two resistance once of resistance one to battery.Described resistance R1 and resistance R29 series connection, and
One end is connected to the positive pole of battery, other end ground connection；Described electric capacity C30 and Zener diode D12 is connected in parallel on resistance respectively
On R29, the in-phase input end of described first operational amplifier LMV344 is connected to the high level end of resistance R29, and described
The outfan of one operational amplifier LMV344 is connected to the respective input of floor processor circuit 22.Voltage detecting uses low
The testing circuit of cost, accuracy of detection is high, 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, described
Resistance Ri is connected in series in the middle of the main branch of set of cells, and 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, the outfan of described second operational amplifier LMV344
It is connected to the respective input of floor processor circuit 22.
Floor processor circuit 22 as shown in Figure 4, Figure 5 is including multidiameter option switch circuit and floor processor, described many
Road selected on-off circuit uses CD74HC4067 chip, 16 input pins of CD74HC4067 chip and 16 groups of voltages
The outfan of the first operational amplifier LMV344 of observation circuit 23 connects respectively, 1 output of CD74HC4067 chip
Pin is connected with the respective pins of floor processor circuit 22, and described floor processor uses STM32F103RBT6 chip,
Output pin and the second computing with CD74HC4067 chip respectively of the 14 of STM32F103RBT6 chip, No. 15 pins is put
The outfan of big device LMV344 is connected, and No. 8 of STM32F103RBT6 chip, No. 9, No. 10 and No. 11 pins are respectively
It is connected with No. 10, No. 11, No. 14 and No. 13 pins of CD74HC4067 chip, it is achieved multi-analog selects the merit of
Energy.
Main processor circuit 12 as shown in Fig. 6, Fig. 8 uses STM32F103VBT6 chip, and this chip has CAN and leads to
Communication interface, and there is more I/O interface, it is possible to realize the interface of CAN communication and liquid crystal display, LCD MODULE
The driving chip of 11 meets the use of most conventional liquid crystal, and the second communication interface circuit 13 uses ISO1050 chip, described
The 97 of STM32F103VBT6 chip, No. 98 pins, 1-5 pin, 28-46 pin, 82-86 pin all for
The respective pins of the driving chip of LCD MODULE 11 is connected, it is achieved liquid crystal display；Described STM32F103VBT6 chip
No. 70 be connected with No. 2 of ISO1050 chip, No. 71 pins of STM32F103VBT6 chip and ISO1050 core
No. 3 pins of sheet are connected and realize main processor circuit 12 and the connection of the second communication interface circuit 13 and data communication thereof.
The first communication interface circuit 21 and the second communication interface circuit 13 as shown in Figure 7 all use ISO1050 chip, this core
Sheet has voltage isolation features, mutually isolated between No. 2, No. 3 pins and No. 6, No. 7 pins, it is achieved thereby that CAN leads to
The information isolation transmission of communication interface, it is achieved that the power current circuit of lower floor's battery and the light current communication on upper strata.First communication interface electricity
No. 2 of ISO1050 chip in road 21, No. 3 pins with STM32F103RBT6 chip No. 45, No. 44 respectively draw
Foot is connected, it is achieved floor processor circuit 22 and the connection of the first communication interface circuit 21 and data communication thereof；Second communication connects
No. 2 of ISO1050 chip in mouth circuit 13 are connected with No. 70 of STM32F103VBT6 chip, ISO1050 core
No. 3 pins of sheet are connected with No. 71 pins of STM32F103VBT6 chip, it is achieved main processor circuit 12 and second leads to
The connection of communication interface circuit 13 and data communication thereof, No. 6 of the ISO1050 chip in the first communication interface circuit 21, No. 7
In pin and the second communication interface circuit 13 No. 6 of ISO1050 chip, No. 7 pins are connected by CAN, it is achieved
Floor processor circuit 22 transmits with the data of main processor circuit 12.
Claims (1)
1. small-sized electric vehicle power supply protector, 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), electricity
Pressure observation circuit (23), current monitoring circuit (24) and set of cells (25), described set of cells (25) includes some economize on electricitys
Pond, the quantity of described electric voltage observation circuit (23) is identical with the quantity of battery, and the both positive and negative polarity of every batteries bridges one group of electricity
Pressure observation circuit (23), described current monitoring circuit (24) is connected in series in set of cells (25), described electric voltage observation circuit
(23) respective input with floor processor circuit (22) is connected respectively with the outfan of current monitoring circuit (24), institute
The corresponding output end stating floor processor circuit (22) is also connected with the first communication interface circuit (21), described second communication
Interface circuit (13) is all connected with main processor circuit (12) with LCD MODULE (11), described first communication interface
Circuit (21) and the second communication interface circuit (13) are connected by CAN, and realize floor processor circuit (22)
Transmit with the data of main processor circuit (12)；Main processor circuit (12) uses STM32F103VBT6 chip, the
Two communication interface circuits (13) use ISO1050 chip, and 97, No. 98 of described STM32F103VBT6 chip are drawn
Foot, 1-5 pin, 28-46 pin, 82-86 pin all for the driving chip of LCD MODULE (11)
Respective pins is connected, it is achieved liquid crystal display；No. 70 of described STM32F103VBT6 chip and the 2 of ISO1050 chip
Number be connected, No. 71 pins of STM32F103VBT6 chip are connected with No. 3 pins of ISO1050 chip, it is achieved main place
Manage device circuit (12) and the connection of the second communication interface circuit (13) and data communication thereof；
Described electric voltage observation circuit (23) and current monitoring circuit (24) can detect the voltage of each batteries group (25) in real time
And electric current, and with given threshold ratio relatively, when voltage is lower than given threshold voltage for a long time, system is in LCD MODULE
(11) providing the warning message of that joint corresponding in, prompting needs to change this batteries；When the electric current of battery is for a long time higher than setting
During fixed threshold current, prompting needs to detect full-vehicle control and drive system；By the voltage and current to set of cells (25)
Monitoring, it is achieved thereby that the condition diagnosing to set of cells (25), provides corresponding warning message in time, and prompting is to set of cells
(25) safeguard, thus reduce the risk of whole set of cells (25) hydraulic performance decline, improve the work of whole set of cells (25)
Make the life-span, reduce system maintenance cost, improve the reliability of car load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029354.9A CN103792493B (en) | 2014-01-22 | Small-sized electric vehicle power supply protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029354.9A CN103792493B (en) | 2014-01-22 | Small-sized electric vehicle power supply protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103792493A CN103792493A (en) | 2014-05-14 |
| CN103792493B true CN103792493B (en) | 2016-11-30 |
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|---|---|---|---|---|
| KR20020097370A (en) * | 2001-06-20 | 2002-12-31 | 현대자동차주식회사 | Display device and method using can communication in a hybrid electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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. |
|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20210122 |