CN201765313U - Lithium battery monitoring system for electric automobile - Google Patents
Lithium battery monitoring system for electric automobile Download PDFInfo
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- CN201765313U CN201765313U CN2010202446724U CN201020244672U CN201765313U CN 201765313 U CN201765313 U CN 201765313U CN 2010202446724 U CN2010202446724 U CN 2010202446724U CN 201020244672 U CN201020244672 U CN 201020244672U CN 201765313 U CN201765313 U CN 201765313U
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- battery
- electric automobile
- lithium battery
- monitoring
- supervisory system
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Abstract
The utility model discloses a lithium battery monitoring system for an electric automobile, which is characterized in that: a central processor sends a monitoring signal to a plurality of gating units, and then is connected to the battery set through an interface circuit to monitor the battery set; the interface circuit transmits an analog signal for monitoring the battery set to an analog-to-digital conversion unit to convert the analog signal into a digital signal, and then the digital signal is connected to the central processor through a separating unit. By adopting the above structure, the monitoring system has the following advantages: 1, timely and accurate monitoring of the battery main body is realized; 2, a cyclic detection mode leads the detection to be more comprehensive; 3, more reliable basis is provided for the calculation of the battery electric quantity, the poor battery is eliminated, and the perfect state of the battery is maintained; 4, a single set of monitoring device is used for monitoring all the battery sets, so as to reduce the production cost and realize maximization of the benefit; 5, the problem of poor consistency caused by non-uniform parameters of a computing amplifier and other chips is solved.
Description
Relate to the field
The utility model relates to the field of batteries of electric automobile, particularly a kind of electric automobile lithium battery supervisory system.
Background technology
Growing tension along with petroleum resources, new-energy automobile particularly electric automobile use more and more widely, with regard to present pure electric automobile, the major impetus source of adopting lithium battery to be used as it has become a kind of main trend, the continuous increase that electric motor car continuation of the journey mileage is required now, and because the restriction of battery technology mainly is at present to rely on the joint number that increases battery to realize the increase of electric motor car continuation of the journey mileage.If, do not have 200 kilometers continuation of the journey mileage as a electric motor car that can be approved by market, be difficult to meet the demands, yet will realize these data, with the technology of present lithium battery, needed since the battery polyphone of joints up to a hundred.
The safety issue of lithium battery, be to stop it to be successfully applied to one of central factor of electric automobile always, in order to bring into play the energy of this hundred multisection lithium battery safely and effectively, guarantee lithium battery safety and stability when high-power discharging and recharging, and can not exert an influence to its life-span, technology can only be accomplished initiatively defence according to the characteristic of battery itself at present, can not monitor in real time the operating position of battery.
Battery body is done in time accurate monitoring, for the calculating of battery electric quantity provides reliable foundation, kick out of bad battery, the kilter that guarantees each battery is the problem that prior art need solve.
The utility model content
Technical problem to be solved in the utility model is, a kind of electric automobile lithium battery supervisory system is provided, and to reach battery body done in time accurate monitoring, for the calculating of battery electric quantity provides reliable foundation, kicks out of the purpose of bad battery.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of electric automobile lithium battery supervisory system is characterized in that: described system is that central processing unit sends pilot signal and inserts electric battery by interface circuit after to the multi channel selecting unit electric battery is monitored; Interface circuit passes to the simulating signal to the electric battery monitoring and inserts central processing unit by isolated location after AD conversion unit converts digital signal to, thereby has realized the real-time monitoring to electric battery, and in time the monitor message of feedback is handled.
Described interface circuit inserts the two ends of every Battery pack respectively be connected to the binary channels solid-state relay of a plurality of parallel connections for the multi channel selecting unit after, thereby every Battery pack is carried out the monitoring of voltage.
The model of described solid-state relay is AQW284, thereby realizes the conversion to the battery voltage detection.
Described multi channel selecting unit is that the gate of a plurality of parallel connections connects reverser, thereby realizes the driving to solid-state relay.
The model of described gate is CD4051; The model of reverser is ULQ2803, thereby realizes selecting different passages that different electric battery is detected.
The chip model that described AD conversion unit adopts is TLC2543, thereby realizes that the analog quantity that detection is obtained is converted into digital quantity.
The isolating chip that described isolated location adopts is DCP010505BP.
The chip model of described central processing unit is MC9S08DZ60, thereby realizes handling to the selection of detection target with to detected data.
A kind of electric automobile lithium battery supervisory system, owing to adopt said structure, this system has the following advantages: 1, realize battery body is done in time accurate monitoring; 2, the cycle detection pattern makes that detection is more comprehensive; 3, the calculating for battery electric quantity provides foundation more reliably, kicks out of bad battery, has guaranteed the kilter of battery; 4, use the whole electric battery of single cover supervising device monitoring, reduce production cost, realize maximizing the benefits; 5, can solve owing to the relatively poor problem of the inhomogeneous consistance that causes of the parameter of chips such as operational amplifier.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;
Fig. 1 is the structural representation of a kind of electric automobile lithium battery of the utility model supervisory system;
Fig. 2 is the circuit diagram of the interface circuit of a kind of electric automobile lithium battery of the utility model supervisory system;
Fig. 3 is the circuit diagram of the circuit gating unit of a kind of electric automobile lithium battery of the utility model supervisory system;
Fig. 4 is the voltage sample buffering filtering circuit figure of a kind of electric automobile lithium battery of the utility model supervisory system;
Fig. 5 is the circuit diagram of the AD conversion unit of a kind of electric automobile lithium battery of the utility model supervisory system;
In Fig. 1-5,1, central processing unit; 2, multi channel selecting unit; 3, interface circuit; 4, electric battery; 5, AD conversion unit; 6, isolated location.
Embodiment
As shown in Figure 1, a kind of electric automobile lithium battery supervisory system is characterized in that: described system is that central processing unit 1 transmission pilot signal is monitored by 4 pairs of electric battery 4 of interface circuit 3 access electric battery to 2 backs, multi channel selecting unit; Interface circuit 3 passes to the simulating signal to electric battery 4 monitoring and inserts central processing unit 1 by isolated location 6 after AD conversion unit 5 converts digital signal to, thereby realized real-time monitoring, and in time the monitor message of feedback has been handled electric battery 4.
As shown in Figure 2 be the interface circuit 3 that the part battery voltage is gathered, adopt the AQW284 of SUNX, this is a twin-channel solid-state relay, its ON time is at 310us, conducting resistance is between 30R-50R, can bear the above high voltage of 400V, V1_～V8_ is the gating passage of MUX among the figure, wherein one the tunnel by behind the gating, the two-way of a solid-state relay will be by the while gating, the magnitude of voltage at tested like this battery two ends just has been transported to the input end of AD conversion unit 5, realizes the purpose of multi channel selecting and cycle detection.
That multi channel selecting unit 2 is as shown in Figure 3 selected is the CD4051 of TI, and it is a 3/8 tunnel gate, and the 8 passage reversers of a ULQ2803 of heel are realized the driving to solid-state relay AQW214.What native system will be measured is the voltage of 100 multisection lithium batteries, therefore solid-state relay AQW214 needs more than 50, corresponding multi channel selecting unit 2 just needs more than 6, but because 5 sampling times of AD conversion unit are the ON time that are far smaller than solid-state relay AQW214, so adopt the solid-state relay conducting simultaneously more than 2, then it is carried out scanning sample, so not only save time, but also economize on hardware cost, therefore, native system only adopts 4 gating units as shown in Figure 3 can realize the quick gating of the circulation of 100 multiple batteries.
Shown in Fig. 4-5, by the solid-state relay of gating the voltage of battery is transmitted to as shown in Figure 4 voltage sample buffering filtering circuit, by after the filtering more stably voltage signal be transferred to the A/D sampling A TLC2543 of AD conversion unit 5.
TLC2543 is 12 bit serial analog to digital converters of TI company, and use switching capacity approximation technique is one by one finished the A/D transfer process.Owing to be the serial input structure, can save 51 series monolithic I/O resources; And moderate, resolution is higher, therefore has in instrument and meter comparatively widely and uses.
The line of TLC2543 and peripheral circuit is simple, and three control input ends are CS (sheet choosing), I/O clock (I/O CLOCK) and serial data input end (DATA INPUT).14 passage Port Multipliers in the sheet can be selected in any one or 3 the built-in self testing voltage in 11 inputs, and it is automatically that sampling one keeps, EOC, and EOC output uprises.
The key property of TLC2543 is: 12 resolution A/D converters; 10 μ s switching times in operating temperature range; 11 analog input channels; 3 path built-in self test modes; Sampling rate is 66kbps; Linear error ± 1LSBmax; EOC output EOC is arranged; Has single, double polarity output; Programmable MSB or LSB are leading; Output data length able to programme.
For the switching that prevents battery voltage detection does not exert an influence to the supply voltage of control system, isolated location 6 is isolated the power supply and the voltage collection circuit of central processing unit 1, the isolating chip of selecting for use is DCPO10505BP, and it can be converted to the 5V supply voltage of Single Chip Microcomputer (SCM) system the supply voltage that is similarly 5V and give AD sample circuit supply 5V power supply.So promptly high-low voltage power source can be isolated, the interference of digital signal can be isolated again simulating signal.
By above-mentioned hardware configuration information as can be known, native system can be realized the circulating sampling of 100 plurality of voltages signals, determined the overlap joint of hardware circuit according to the actual conditions of battery after, just need software that sampled data is demarcated, determine one accurately algorithm to realize the accurate collection of voltage data, this needs a large amount of experiments to finish, for demarcating good voltage acquisition system, the data that collect are after the single-chip microcomputer computing, whether the state that determines each batteries of battery in charge and discharge process is normal, if any unusually, it is unusual to determine which batteries, so that the timely discovery and the replacing of battery problems, and then make the battery operated of entire cell bag in maximum performance state.
Realize by CAN-BUS during the communication of native system and car load.
According to the concrete condition of real vehicle, the native system software flow is:
Step 1: power-up initializing;
Step 2: each batteries voltage of cycle detection;
Step 3: judge whether cell voltage is normal, if judged result enters step 4 for not after then judging the cell voltage abnormity point and sending the data to car load;
Step 4: judge whether system closes, if judged result then enters step 2 for not;
Step 5: preserve final battery status data.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.
Claims (8)
1. electric automobile lithium battery supervisory system is characterized in that: described system is that central processing unit (1) sends pilot signal and electric battery (4) monitored by interface circuit (3) access electric battery (4) to multi channel selecting unit (2) back; Interface circuit (3) passes to the simulating signal to electric battery (4) monitoring and inserts central processing unit (1) by isolated location (6) after AD conversion unit (5) converts digital signal to.
2. a kind of electric automobile lithium battery supervisory system according to claim 1 is characterized in that: described interface circuit (3) is connected to the two ends of inserting every Battery pack behind the binary channels solid-state relay of a plurality of parallel connections respectively for multi channel selecting unit (2).
3. a kind of electric automobile lithium battery supervisory system according to claim 2, it is characterized in that: the model of described solid-state relay is AQW284.
4. a kind of electric automobile lithium battery supervisory system according to claim 1 is characterized in that: described multi channel selecting unit (2) connects reverser for the gate of a plurality of parallel connections.
5. a kind of electric automobile lithium battery supervisory system according to claim 4, it is characterized in that: the model of described gate is CD4051; The model of reverser is ULQ2803.
6. a kind of electric automobile lithium battery supervisory system according to claim 1 is characterized in that: the chip model that described AD conversion unit (5) adopts is TLC2543.
7. a kind of electric automobile lithium battery supervisory system according to claim 1 is characterized in that: the isolating chip that described isolated location (6) adopts is DCP010505BP.
8. a kind of electric automobile lithium battery supervisory system according to claim 1, it is characterized in that: the chip model of described central processing unit (1) is MC9S08DZ60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202446724U CN201765313U (en) | 2010-06-30 | 2010-06-30 | Lithium battery monitoring system for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202446724U CN201765313U (en) | 2010-06-30 | 2010-06-30 | Lithium battery monitoring system for electric automobile |
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| Publication Number | Publication Date |
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| CN201765313U true CN201765313U (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202446724U Expired - Fee Related CN201765313U (en) | 2010-06-30 | 2010-06-30 | Lithium battery monitoring system for electric automobile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468672A (en) * | 2010-12-22 | 2012-05-23 | 凹凸电子（武汉）有限公司 | Battery monitoring system and method |
| CN102736032A (en) * | 2011-04-11 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | System and method for determining battery capacity in an electric vehicle |
| CN103116054A (en) * | 2013-01-25 | 2013-05-22 | 天津市松正电动汽车技术股份有限公司 | Isolation voltage acquisition circuit |
| CN104155610A (en) * | 2014-07-28 | 2014-11-19 | 西北农林科技大学 | Recorder for storage battery condition |
| CN111584956A (en) * | 2020-05-13 | 2020-08-25 | 东莞新能安科技有限公司 | Temperature acquisition circuit, battery control circuit, battery management system and battery package |
-
2010
- 2010-06-30 CN CN2010202446724U patent/CN201765313U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468672A (en) * | 2010-12-22 | 2012-05-23 | 凹凸电子（武汉）有限公司 | Battery monitoring system and method |
| CN102736032A (en) * | 2011-04-11 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | System and method for determining battery capacity in an electric vehicle |
| CN102736032B (en) * | 2011-04-11 | 2016-01-20 | 通用汽车环球科技运作有限责任公司 | For determining the System and method for of battery capacity in electric vehicle |
| US9283947B2 (en) | 2011-04-11 | 2016-03-15 | GM Global Technology Operations LLC | System and method for determining battery capacity in an electric vehicle |
| CN103116054A (en) * | 2013-01-25 | 2013-05-22 | 天津市松正电动汽车技术股份有限公司 | Isolation voltage acquisition circuit |
| CN104155610A (en) * | 2014-07-28 | 2014-11-19 | 西北农林科技大学 | Recorder for storage battery condition |
| CN111584956A (en) * | 2020-05-13 | 2020-08-25 | 东莞新能安科技有限公司 | Temperature acquisition circuit, battery control circuit, battery management system and battery package |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20110316 Termination date: 20150630 |
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| EXPY | Termination of patent right or utility model |