CN202929177U - Lithium battery pack distributed detection apparatus with vibration and humiture detection functions - Google Patents
Lithium battery pack distributed detection apparatus with vibration and humiture detection functions Download PDFInfo
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- CN202929177U CN202929177U CN 201220579388 CN201220579388U CN202929177U CN 202929177 U CN202929177 U CN 202929177U CN 201220579388 CN201220579388 CN 201220579388 CN 201220579388 U CN201220579388 U CN 201220579388U CN 202929177 U CN202929177 U CN 202929177U
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Abstract
The utility model discloses a lithium battery pack distributed detection apparatus with vibration and humiture detection functions, comprising a plurality of detection units, wherein each detection unit uses 16 serially-connected lithium cells for measurement, each detection unit comprises a relay gating array, a decoder gating unit, a precise reference voltage source circuit, a signal conditioning unit, a dial switch, a microprocessor MCU, a vibration sensor module and a humiture sensor module, wherein a microcontroller MCU performs loop detection on cells through the relay gating array, the decoder gating unit, the precise reference voltage source circuit and the signal conditioning unit, the sensor module and the humiture sensor module transmit collected information to the microcontroller MCU through an I2C bus and an I/O port, and the detection units transmit collected voltage information, vibration grade information and humiture information of lithium cells to a lithium battery pack main control unit through a CAN bus. The lithium battery pack distributed detection apparatus with vibration and humiture detection functions is simple and clear, is high in reliability, and can perform high-precise detection on voltage signals of lithium cells and vibration signals and humiture signals of the battery pack.
Description
Technical field
The utility model belongs to a kind of lithium battery distribution type detection method, specifically a kind of lithium battery distribution type pick-up unit with vibration and humiture detection.
Background technology
Lithium battery becomes rapidly the focus of modern hybrid electric vehicle research and development because it has high-energy-density, long-life, low self-discharge rate, the advantage such as pollution-free.Hybrid power is many between 300～400V to the requirement of battery tension, indivedual electric automobiles is also arranged because the demand of power can make the accumulator total voltage reach volt more than 500.General monolithic lithium battery is full of electricity for more than 3.32V, reach a few hectovolt power sources and need 100 multi-disc lithium battery monolithic series connection, lithium battery system reason due to various inside or outside in operational process may make the work of lithium battery monolithic occur extremely, thereby affect performance and the safety of whole lithium battery system, in order to ensure the normal operation of lithium battery and assess its performance, the reply operational factor is carried out Real Time Monitoring.In being applied to the process of hybrid power system, a lot of common factors can affect lithium battery work, and in the car body that causes as, collision rugged by the road surface, overturning etc., the lithium battery vibration may cause the battery system serviceability to be affected; The lithium battery group can form certain thermograde in the course of the work in battery case because of heating, can make the performance degradation of battery when excess Temperature, even burns battery; In lithium battery, the existence of moisture not only can cause the decomposition of lithium salts in lithium battery electrolytes and positive and negative pole material, collector are had certain corrosion failure effect, and causing cycle performance of battery and security performance to reduce, the too high battery capacity that also can cause of hydrone decays.Therefore the detection of vibration state, humiture information is also very important part in the detection of lithium battery.
a kind of lithium battery distribution type detection method with vibration and humiture detection is as a kind of novel lithium battery group detection method, not only added the detection of very important vibration and humiture but also made improvement in traditional detection mode on voltage detecting, form battery module take a plurality of battery cells as one group in the traditional detection mode, measurement module voltage, general module voltage has about 20 volts (forming battery module as example take five battery cells), voltage is higher, generally need isolation just can output to next stage, this mode not only can not be concrete the performance of knowing every cell (can only know the performance of battery module), but also make detecting unit more complicated.
Summary of the invention
The purpose of this utility model is to provide the lithium battery distribution type pick-up unit that a kind of simple and reliable, band that extensibility is strong vibration and humiture detect, to overcome the deficiencies in the prior art.
In order to realize above purpose, the technical solution adopted in the utility model is:
a kind of lithium battery distribution type pick-up unit with vibration and humiture detection, comprise several detecting units, each detecting unit is measured with the lithium battery monomer of a plurality of series connection, each detecting unit detects each lithium battery monomer, be characterized in: described each detecting unit comprises: relay gating array, the code translator gating unit, the signal condition unit, toggle switch, Micro-processor MCV and self powered supply module, described relay gating array is connected with Micro-processor MCV by the code translator gating unit, described Micro-processor MCV also joins with signal condition unit and toggle switch respectively, Micro-processor MCV is connected with lithium battery bag main control unit by the CAN bus, described self powered supply module input connects the lithium battery bag, its output terminal is given whole device power supply.
Also involving vibrations sensor assembly and Temperature Humidity Sensor module, the input end of described vibration transducer module and Temperature Humidity Sensor module is connected with the lithium battery bag respectively, and the output terminal of described vibration transducer module and Temperature Humidity Sensor module is connected with described Micro-processor MCV respectively.
Described signal condition unit is connected with Micro-processor MCV by the accurate reference voltage circuit.
The lithium battery monomer of described series connection is 16, when detecting the lithium battery bag of m sheet monocell series connection, adopts m/16 detecting unit.
The input end of described code translator is connected with the I/O mouth of Micro-processor MCV.
Described relay array is comprised of 16 relays, and the corresponding relay of each lithium battery monomer contains two single relays in each relay, and two single relays are connected with the both positive and negative polarity of lithium battery monomer respectively.
Described signal condition unit comprises voltage follower, voltage inverter, difference ratio amplifying circuit, precision resistance R1～R6, capacitor C 1～C2 and the stabilivolt that accurate rail-to-rail amplifier consists of; wherein the input end of monolithic voltage signal is connected with the in-phase end of difference ratio amplifying circuit; described accurate reference voltage is connected with the end of oppisite phase of difference ratio amplifying circuit through voltage inverter, and the output terminal of signal condition unit is provided with the amplitude limit output protection circuit of electric capacity and stabilivolt composition.
Compare with many battery testing systems of modern times, the utility model has been introduced the detection of vibration signal and temperature-humidity signal, has strengthened the reliability that battery system is used.In order to realize purpose, at first adopted the acceleration transducer MMA7455L of freescale company to gather vibration signal, MMA7455L provides I
2C and SPI digital interface, this can be connected by the master control synchronous serial port microcontroller with peripheral module.The microcontroller MCU of detecting unit passes through I
2After the C bus obtains vibration signal, vibration signal is judged classification (being divided into serious vibration and slight vibration).Secondly adopted the AM2303 of Ao Song company for the collection of humiture, this is a digital integrated Temperature Humidity Sensor, and precision is high, does not need A/D converter, only needs by simple I/O mouth to the microcontroller transmission of information.
In addition, compare with traditional detection system, adopt the self-powered pattern in this detection mode, do not need Switching Power Supply that check-out console is powered.What this detecting unit adopted is the 24V power supply, connects as power supply with eight lithium battery monolithics.Then utilize power module that the 24V voltage transitions is become needed each voltage gradation.
Due to a lot of check-out consoles being arranged, and every check-out console is connected to the form of similar parallel connection and on the CAN network, the information that collects sent to lithium battery bag main control unit, and lithium battery bag main control unit can receive by the CAN network information that collects from each check-out console.For the information that the lithium battery main control unit can be distinguished collect on the CAN network from which check-out console, the toggle switch that has added one 5 on each check-out console, by toggle switch, each check-out console is numbered the indications when this numbers as this check-out console CAN communication.The dial-up of toggle switch can carry out label to 31 fast check-out consoles from 00001～11111 successively.Any at first can judge the CAN net indications of transmitting terminal (check-out console) during the CAN communication on the lithium battery main control unit with the signal that clearly receives from piece check-out console.
Description of drawings
Fig. 1 is the utility model one-piece construction schematic diagram.
Fig. 2 is the utility model detecting unit self powered supply modular structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done further and elaborated.
As shown in Figure 1, at first detection system can be divided into two parts: lithium battery detecting unit and lithium battery main control unit, connect by the CAN network between these two parts, check-out console gathers bottom data, then sends to the lithium battery main control unit by the CAN network.
adopt the self-powered pattern in described detecting unit, as shown in Figure 2, eight lithium battery monolithics are connected as power supply, in phosphate lithium battery monolithic voltage when normal operation, be 3.3V approximately, in charge and discharge process, the variation range of voltage is 3.0V～3.4V, eight lithium batteries voltage that is together in series is 24～27.2V, can it regard the approximately power supply of 24V as, then utilize power module that the 24V power supply is converted to needed electric pressure, in this detecting unit required electric pressure be positive and negative 12V and+5V, so what adopt is that become a full member negative 12V power module A2412S-1W and 24V of 24V turns+5V power module B2405-2W.Consider that in the CAN interface circuit, light need to separate every power supply, so adopted two 24V to turn+power module of 5V.
The utility model has adopted the Distributed Detection method, measures as a detecting unit take 16 lithium battery monomers, and i detecting unit is to lithium battery monomer C
(16t+1)～C
(16t+16)(wherein t=i-1) detects, each detecting unit structure is identical, mainly comprises: relay gating array, code translator gating unit, accurate reference voltage circuit, signal condition unit, toggle switch, Micro-processor MCV and vibration transducer module and Temperature Humidity Sensor module.Unique difference is the ID difference of each detecting unit, and the toggle switch on detecting unit is once 00001,00010,00011,00100 ... being respectively detecting unit 1～N arranges ID(N and is generally less than 31).By No. ID, judgement, the lithium battery main control unit can judge which detecting unit is the data that receive on the CAN network come from.
Output terminal (K1, the K2 of the lithium battery monolithic in each detecting unit of the present utility model and corresponding relay gating array ... K32) be connected, the input end light-emitting diodes tube cathode of relay gating array is connected with the output terminal of code translator.The input end of code translator is controlled by the I/O mouth of microcontroller, when carrying out 16 kinds of states, input end A0, A1, A2, the A3 from 0000 to 1111 of code translator switch, output terminal Y0～the Y15 of code translator is output as successively low level and drives corresponding relay J i(i=1,2 ... 16) K switch (2i-1) and K2i(i=1,2 in ... 32) closure makes the lithium battery monolithic minus earth positive pole that is strobed connect signal condition unit input end.Output any time of code translator only has one to be low level, and this has just guaranteed that any time only has monolithic battery to detect online.The input end Vin that the voltage signal of the online monolithic battery that detects is sent into the signal condition unit carries out the voltage conditioning, has introduced a 4.096V reference voltage source with the current potential of lifting input signal in the signal condition unit, in order to measure the negative pressure value that barrier for some reason occurs.The output end vo ut of signal condition unit is directly connected to the inside A/D module of microcontroller.that relay is selected is AQW214EHAZ, comprise two single relays in each AQW214EHAZ, controlling respectively the both positive and negative polarity of lithium battery monolithic, due to each detecting unit detection is 16 battery monomers, so the code translator of selecting makes 4-16 line code translator 74HC154, what the resistance in the signal condition unit adopted is the essence resistance, to guarantee the accuracy of phase inverter and proportional difference circuit, consider that the input terminal voltage in the signal condition power supply may surpass 5V, the amplifier of selecting is that supply voltage can be greater than the accurate amplifier chip MAX479 of 5V, 4 operational amplifiers are contained in the inside, just satisfy the demand of 4 operational amplifiers in signal conditioning circuit, amplitude limit output protection circuit in the signal condition unit adopts the stabilivolt of 5.1V to get final product, because the output of process signal condition unit can not surpass 5V.The voltage reference that adopts in inner A/D module is+4.096V to be provided by accurately+4.096V voltage source X60008ES8-41.
In the utility model, the vibration transducer module has adopted the acceleration transducer MMA7455L of freescale company to gather vibration signal, and MMA7455L provides I
2C and SPI digital interface, this can be connected by the master control synchronous serial port microcontroller with peripheral module.The Temperature Humidity Sensor module has adopted the AM2303 of Ao Song company, and this is a digital integrated Temperature Humidity Sensor, and precision is high, does not need A/D converter, only needs by simple I/O mouth to the microcontroller transmission of information.
The utility model detecting unit sends to lithium battery bag main control unit with voltage signal, vibration signal, the temperature-humidity signal that collects by the CAN network, all need before CAN that detecting unit is connected with main control unit connects a CAN interface circuit, this interface circuit comprise light every with the CAN transceiver.The light that adopts in the CAN interface circuit every be high-speed light every 6N137, the CAN transceiver adopts be applied to automobile high speed field PCA82C250. this be present the most widely used CAN transceiver, support ISO---11898 standards.As seen from Figure 1, the I/O mouth that microcontroller need to enrich has inner A/D converter, I
2C bus, CAN bus, so the PIC18F258 of in detecting unit, microcontroller adopts MICROCHIP company.
Abovely in conjunction with most preferred embodiment, the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to essence of the present utility model.
Claims (7)
1. lithium battery distribution type pick-up unit with vibration and humiture detection, comprise several detecting units, each detecting unit is measured with the lithium battery monomer of a plurality of series connection, each detecting unit detects each lithium battery monomer, it is characterized in that: described each detecting unit comprises: relay gating array, the code translator gating unit, the signal condition unit, toggle switch, Micro-processor MCV and self powered supply module, described relay gating array is connected with Micro-processor MCV by the code translator gating unit, described Micro-processor MCV also joins with signal condition unit and toggle switch respectively, Micro-processor MCV is connected with lithium battery bag main control unit by the CAN bus, described self powered supply module input connects the lithium battery bag, its output terminal is given whole device power supply.
2. the lithium battery distribution type pick-up unit that band as claimed in claim 1 vibrates and humiture detects, it is characterized in that: go back involving vibrations sensor assembly and Temperature Humidity Sensor module, the input end of described vibration transducer module and Temperature Humidity Sensor module is connected with the lithium battery bag respectively, and the output terminal of described vibration transducer module and Temperature Humidity Sensor module is connected with described Micro-processor MCV respectively.
3. the lithium battery distribution type pick-up unit of band as claimed in claim 1 vibration and humiture detection is characterized in that: described signal condition unit is connected with Micro-processor MCV by the accurate reference voltage circuit.
4. the lithium battery distribution type pick-up unit that band as claimed in claim 1 vibrates and humiture detects, it is characterized in that: the lithium battery monomer of described series connection is 16, when detecting the lithium battery bag of m sheet monocell series connection, adopts m/16 detecting unit.
5. the lithium battery distribution type pick-up unit that band as claimed in claim 1 vibrates and humiture detects, it is characterized in that: the input end of described code translator gating unit is connected with the I/O mouth of Micro-processor MCV.
6. the lithium battery distribution type pick-up unit that band as described in claim 1 or 4 vibrates and humiture detects, it is characterized in that: described relay array is comprised of 16 relays, the corresponding relay of each lithium battery monomer, contain two single relays in each relay, two single relays are connected with the both positive and negative polarity of lithium battery monomer respectively.
7. the lithium battery distribution type pick-up unit that band as claimed in claim 1 vibrates and humiture detects, it is characterized in that: described signal condition unit comprises the voltage follower that accurate rail-to-rail amplifier consists of, voltage inverter, difference ratio amplifying circuit, precision resistance R1～R6, capacitor C 1～C2 and stabilivolt, wherein the input end of monolithic voltage signal is connected with the in-phase end of difference ratio amplifying circuit, described accurate reference voltage is connected with the end of oppisite phase of difference ratio amplifying circuit through voltage inverter, the output terminal of signal condition unit is provided with the amplitude limit output protection circuit of electric capacity and stabilivolt composition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220579388 CN202929177U (en) | 2012-11-06 | 2012-11-06 | Lithium battery pack distributed detection apparatus with vibration and humiture detection functions |
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| CN 201220579388 CN202929177U (en) | 2012-11-06 | 2012-11-06 | Lithium battery pack distributed detection apparatus with vibration and humiture detection functions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569711A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Method and testing device for electronic component open/short circuit test |
| CN109301290A (en) * | 2018-11-23 | 2019-02-01 | 武汉理工大学 | A kind of fuel battery voltage cruising inspection system with water logging diagnosis |
| CN109632227A (en) * | 2019-01-11 | 2019-04-16 | 北京长城华冠汽车科技股份有限公司 | Battery method for detecting vibration, battery vibration detection device |
-
2012
- 2012-11-06 CN CN 201220579388 patent/CN202929177U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569711A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Method and testing device for electronic component open/short circuit test |
| CN109301290A (en) * | 2018-11-23 | 2019-02-01 | 武汉理工大学 | A kind of fuel battery voltage cruising inspection system with water logging diagnosis |
| CN109301290B (en) * | 2018-11-23 | 2020-10-30 | 武汉理工大学 | Fuel cell voltage inspection system with water flooding diagnosis function |
| CN109632227A (en) * | 2019-01-11 | 2019-04-16 | 北京长城华冠汽车科技股份有限公司 | Battery method for detecting vibration, battery vibration detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20151106 |
|
| EXPY | Termination of patent right or utility model |