CN103792494A - Power management device of small electric vehicle - Google Patents
Power management device of small electric vehicle Download PDFInfo
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- CN103792494A CN103792494A CN201410029450.3A CN201410029450A CN103792494A CN 103792494 A CN103792494 A CN 103792494A CN 201410029450 A CN201410029450 A CN 201410029450A CN 103792494 A CN103792494 A CN 103792494A
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- 238000004891 communication Methods 0.000 claims abstract description 45
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000002955 isolation Methods 0.000 description 5
- 230000007423 decrease Effects 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
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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, relate in particular to a kind of small-sized electric vehicle power management device.
Background technology
At present in small-sized electric vehicle; extensively adopt the power supply of lead-acid battery group; in real work; often owing to manufacturing, the factor such as aging; in a Battery pack group, usually have indivedual batteries and occur undertension, too low situation, can cause total cell voltage to decline; thereby the electric current of electric battery strengthens, long-term use can cause the life-span of whole electric battery to decline.In small-sized electric vehicle, do not take any measure to detect for the each cell voltage of electric battery at present, usually can cause the whole electric battery life-span to be reduced, increased the maintenance cost of car load.
Summary of the invention
In order to solve above-mentioned technical matters, the object of this invention is to provide a kind of small-sized electric vehicle power management device, this device can provide warning message in advance, thereby can change in time out of order battery, improves the mission life of whole electric battery.
In order to realize above-mentioned object, the present invention has adopted following technical scheme:
Small-sized electric vehicle power management device, comprise LCD MODULE, main processor circuit, the second communication interface circuit, the first communication interface circuit, floor processor circuit, electric voltage observation circuit, current monitoring circuit and electric battery, described electric battery comprises some batteries, the quantity of described electric voltage observation circuit is identical with the quantity of battery, one group of electric voltage observation circuit of cross-over connection on the both positive and negative polarity of every batteries, described current monitoring circuit is connected in series in electric battery, the output terminal of described electric voltage observation circuit and current monitoring circuit is connected with the respective input of floor processor circuit respectively, the corresponding output end of described floor processor circuit is also connected with the first communication interface circuit, described the second communication interface circuit is all connected with main processor circuit with LCD MODULE, described the first communication interface is connected by CAN bus with the second communication interface, and realize the data transmission of floor processor circuit and main processor circuit, described electric voltage observation circuit comprises the first operational amplifier LMV344, voltage stabilizing diode D12, capacitor C 30, resistance R 1 and resistance R 29, and described resistance R 1 and resistance R 29 are connected, and one end is connected to the positive pole of battery, other end ground connection, described capacitor C 30 and voltage stabilizing diode D12 are connected in parallel on respectively in resistance R 29, the in-phase input end of described the first operational amplifier LMV344 is connected to the high level end of resistance R 29, and the output terminal of described the first operational amplifier LMV344 is connected to the respective input of floor processor circuit.
As preferred version: the resistance of described resistance R 1 is 450-650K, and the resistance of described resistance R 29 is 5-20K.Can carry out dividing potential drop to battery by large two resistance once of resistance one.
The present invention by adding a set of observation circuit in electric battery, detect in real time the voltage and current of each batteries group, and with given threshold value comparison, in the time that voltage is lower than given threshold voltage for a long time, system provides the warning message of corresponding that joint in display screen, and prompting need to be changed this batteries.When the electric current of battery for a long time higher than set threshold current time, prompting need to detect car load control and drive system.By the monitoring of the voltage and current to electric battery, thereby realize the condition diagnosing to electric battery, provide in time corresponding warning message, prompting is safeguarded battery system or other system, thereby reduce the risk that whole battery performance declines, improve the mission life of whole electric battery, reduce system maintenance cost, improved the reliability of car load.
The present invention adopts double-layer structure, and the signal that communication interface transmits is digital quantity, can isolate by comparatively simple method, thereby can well realize the isolation of power electric and weak electric signal.If bottom cell part and man-machine interface part are all arranged in same installing mechanism, need to connect more lead-in wire to electric battery, general electric battery from cockpit instrument part away from, need more tie, adopt double-layer structure of the present invention, the middle communication bus that uses connects, the tie needing is less, thereby can reduce connection lead-in wire, and realizes strong and weak electricity isolation, reduce system cost, increased system reliability.
Accompanying drawing explanation
Fig. 1 is system chart of the present invention.
Fig. 2 is the circuit diagram of electric voltage observation circuit of the present invention.
Fig. 3 is the circuit diagram of current monitoring circuit of the present invention.
Fig. 4 is the circuit diagram of multidiameter option switch circuit of the present invention.
Fig. 5 is the circuit diagram of floor processor circuit of the present invention.
Fig. 6 is the circuit diagram of 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.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
Small-sized electric vehicle power management device as shown in Figure 1, comprise man-machine interface part 1 and bottom cell monitor portion 2, man-machine interface part 1 is positioned at bridge instrumentation part, man-machine interface part 1 is responsible for the data communication of realization and bottom cell monitor portion 2, obtain the status information of battery, and calculate in real time and show the electric current of each batteries voltage and electric battery 25, described man-machine interface part 1 comprises LCD MODULE 11, main processor circuit 12 and the second communication interface circuit 13, bottom cell monitor portion 2 is positioned at electric battery 25 install bin parts, and it is mainly responsible for realizing the sampling of cell voltage, electric current, and carries out digitizing, and by floor processor circuit 22, data is processed, and then carries out communication by communication interface and host computer, described bottom cell monitor portion 2 comprises the first communication interface circuit 21, floor processor circuit 22, electric voltage observation circuit 23, current monitoring circuit 24 and electric battery 25, described electric battery 25 comprises 16 batteries, the described quantity of electric voltage observation circuit 23 is identical with the quantity of battery, one group of electric voltage observation circuit 23 of cross-over connection on the both positive and negative polarity of every batteries, described current monitoring circuit 24 is connected in series in electric battery 25, the output terminal of described electric voltage observation circuit 23 and current monitoring circuit 24 is connected with the respective input of floor processor circuit 22 respectively, the corresponding output end of described floor processor circuit 22 is also connected with the first communication interface circuit 21, described the second communication interface circuit 13 is all connected with main processor circuit 12 with LCD MODULE 11, described the first communication interface 21 is connected by CAN bus with the second communication interface 13, and realize the data transmission of floor processor circuit 22 and main processor circuit 12.
Electric voltage observation circuit 23 as shown in Figure 2, comprise the first operational amplifier LMV344, voltage stabilizing diode D12, capacitor C 30, resistance R 1 and resistance R 29, the resistance of described resistance R 1 is 500K Ω, the resistance of described resistance R 29 is 10K Ω, by large two resistance once of resistance one, battery is carried out to dividing potential drop.Described resistance R 1 and resistance R 29 are connected, and one end is connected to the positive pole of battery, other end ground connection; Described capacitor C 30 and voltage stabilizing diode D12 are connected in parallel on respectively in resistance R 29, the in-phase input end of described the first operational amplifier LMV344 is connected to the high level end of resistance R 29, and the output terminal of described the first operational amplifier LMV344 is connected to the respective input of floor processor circuit 22.Voltage detecting adopts testing circuit cheaply, and accuracy of detection is high, and cost is low, good reliability.
As Fig. 4, floor processor circuit 22 shown in Fig. 5, comprise multidiameter option switch circuit and floor processor, described multidiameter option switch circuit adopts CD74HC4067 chip, 16 input pins of CD74HC4067 chip are connected respectively with the output terminal of the first operational amplifier LMV344 of 16 groups of electric voltage observation circuits 23, 1 output pin of CD74HC4067 chip is connected with the respective pins of floor processor circuit 22, described floor processor adopts STM32F103RBT6 chip, 14 of STM32F103RBT6 chip, No. 15 pin is connected with the output terminal of the second operational amplifier LMV344 with the output pin of CD74HC4067 chip respectively, No. 8 of STM32F103RBT6 chip, No. 9, No. 10 and No. 11 pins respectively with No. 10 of CD74HC4067 chip, No. 11, be connected with No. 13 pins for No. 14, realize multi-analog and select one function.
As Fig. 6, main processor circuit 12 shown in Fig. 8 adopts STM32F103VBT6 chip, this chip has CAN communication interface, and there is more IO interface, can realize the interface of CAN communication and liquid crystal display, the driving chip of LCD MODULE 11 meets the use of most conventional liquid crystal, the second communication interface circuit 13 adopts ISO1050 chip, 97 of described STM32F103VBT6 chip, No. 98 pins, 1-5 pin, 28-46 pin, 82-86 pin is all used for being connected with the respective pins of the driving chip of LCD MODULE 11, realize liquid crystal display, No. 70, No. 71 pins of described STM32F103VBT6 chip are connected with No. 2, No. 3 pins of ISO1050 chip, realize being connected and data communication of main processor circuit 12 and the second communication interface circuit 13.
The first communication interface circuit 21 and the second communication interface circuit 13 as shown in Figure 7 all adopt ISO1050 chip, this chip has voltage isolation features, isolation mutually between No. 2, No. 3 pins and No. 6, No. 7 pins, thereby realize the information isolation transmission of CAN communication interface, realized the power electric circuit of lower floor's battery and the light current communication on upper strata.No. 2, No. 3 pins of the ISO1050 chip in the first communication interface circuit 21 are connected with No. 45, No. 44 pins of STM32F103RBT6 chip respectively, realize being connected and data communication of floor processor circuit 22 and the first communication interface circuit 21; No. 2, No. 3 pins of the ISO1050 chip in the second communication interface circuit 13 are connected with No. 70, No. 71 pins of STM32F103VBT6 chip respectively, realize being connected and data communication of main processor circuit 12 and the second communication interface circuit 13, No. 6, No. 7 pins of the ISO1050 chip in the first communication interface circuit 21 are connected by CAN bus with No. 6, No. 7 pins of the ISO1050 chip in the second communication interface circuit 13, realize the data transmission of floor processor circuit 22 and main processor circuit 12.
Claims (2)
1. small-sized electric vehicle power management device, it is characterized in that: comprise LCD MODULE (11), main processor circuit (12), the second communication interface circuit (13), the first communication interface circuit (21), floor processor circuit (22), electric voltage observation circuit (23), current monitoring circuit (24) and electric battery (25), described electric battery (25) comprises some batteries, the quantity of described electric voltage observation circuit (23) is identical with the quantity of battery, one group of electric voltage observation circuit of cross-over connection (23) on the both positive and negative polarity of every batteries, described current monitoring circuit (24) is connected in series in electric battery (25), the output terminal of described electric voltage observation circuit (23) and current monitoring circuit (24) is connected with the respective input of floor processor circuit (22) respectively, the corresponding output end of described floor processor circuit (22) is also connected with the first communication interface circuit (21), described the second communication interface circuit (13) is all connected with main processor circuit (12) with LCD MODULE (11), described the first communication interface (21) is connected by CAN bus with the second communication interface (13), and realize the data transmission of floor processor circuit (22) and main processor circuit (12), described electric voltage observation circuit (23) comprises the first operational amplifier LMV344, voltage stabilizing diode D12, capacitor C 30, resistance R 1 and resistance R 29, and described resistance R 1 and resistance R 29 are connected, and one end is connected to the positive pole of battery, other end ground connection, described capacitor C 30 and voltage stabilizing diode D12 are connected in parallel on respectively in resistance R 29, the in-phase input end of described the first operational amplifier LMV344 is connected to the high level end of resistance R 29, and the output terminal of described the first operational amplifier LMV344 is connected to the respective input of floor processor circuit (22).
2. small-sized electric vehicle power management device according to claim 1, is characterized in that: the resistance of described resistance R 1 is 450-650K Ω, the resistance of described resistance R 29 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410029450.3A CN103792494B (en) | 2014-01-22 | 2014-01-22 | Power management device of small electric vehicle |
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| CN103792494A true CN103792494A (en) | 2014-05-14 |
| CN103792494B CN103792494B (en) | 2017-01-25 |
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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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Cited By (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 |
| GB2561558A (en) * | 2017-04-13 | 2018-10-24 | De Innovation Lab Ltd | Electrical vehicle information system and method of operation |
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| CN201345393Y (en) * | 2008-11-25 | 2009-11-11 | 北京市电力公司 | Battery monitoring system used in electric automobile battery charger |
| CN101576584A (en) * | 2008-05-09 | 2009-11-11 | 李尔公司 | Voltage measurement of high voltage batteries for hybrid and electric vehicles |
| 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 |
-
2014
- 2014-01-22 CN CN201410029450.3A patent/CN103792494B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080022676A (en) * | 2006-09-07 | 2008-03-12 | 삼성에스디아이 주식회사 | Battery management system and driving method thereof |
| 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 |
Cited By (3)
| 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 |
| GB2561558A (en) * | 2017-04-13 | 2018-10-24 | De Innovation Lab Ltd | Electrical vehicle information system and method of operation |
| GB2561558B (en) * | 2017-04-13 | 2019-10-16 | De Innovation Lab Ltd | Electrical vehicle information system and method of operation |
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| CN103792494B (en) | 2017-01-25 |
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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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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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Granted publication date: 20170125 Termination date: 20210122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |