CN204666715U - A kind of electric automobile power battery current detecting system - Google Patents
A kind of electric automobile power battery current detecting system Download PDFInfo
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- CN204666715U CN204666715U CN201520190986.3U CN201520190986U CN204666715U CN 204666715 U CN204666715 U CN 204666715U CN 201520190986 U CN201520190986 U CN 201520190986U CN 204666715 U CN204666715 U CN 204666715U
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Abstract
The utility model relates to current measurement techniques field, especially a kind of electric automobile power battery current detecting system.It comprises Hall element, signal conditioning circuit, A/D change-over circuit, digital buffer circuit, microcontroller, RS485 interface circuit, CAN interface circuit and memory module; Hall element gathers current signal and output voltage signal carries out filtering interfering to signal conditioning circuit, voltage signal after filtering interfering carries out changing and provides stable digital signal to process to microcontroller by digital buffer circuit by A/D change-over circuit, RS485 interface circuit is for realizing the communication of microcontroller and host computer, the current data of collection is sent to vehicle control unit of electric vehicle by CAN interface circuit, and memory module is used for the current data of storage of collected.The utility model have higher accuracy of detection, reliability high, accurate foundation can be provided for the estimation of electric automobile SoC, the part in actual applications as battery management system applies on electric automobile.
Description
Technical field
The utility model relates to current measurement techniques field, especially a kind of electric automobile power battery current detecting system.
Background technology
Along with electric automobile Commercial scale constantly expands, the requirement of Ge great whole-car firm to SoC (State of Charge) estimation precision is more and more higher.The SoC of power battery pack is for prediction vehicle remaining driving mileage, and charge and discharge phenomena has great significance to avoid battery to occur.
The method measuring electric current in industrial circle mainly contains three kinds: shunt (resistance sampling method), current transformer method, Hall element method.The precision of the resistance that shunt is used is difficult to control, the resistance also easy temperature influence of resistance.The volume ratio of current transformer is comparatively large, install inconvenient, and generally it is used for the measurement of AC signal.The current precision that Hall element detects is very high, and the real-time of detection is given prominence to, and can realize and detected object completely isolated.
At present, in detection electric automobile power battery group charging and discharging currents, be adopt shunt method or the detection system of Hall element method all has much room for improvement to the process of current interference signal and the precision of detection.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of accuracy of detection and the high electric automobile power battery current detecting system of antijamming capability.
To achieve these goals, the utility model adopts following technical scheme:
A kind of electric automobile power battery current detecting system, is characterized in that: it comprises Hall element, signal conditioning circuit, A/D change-over circuit, digital buffer circuit, microcontroller, RS485 interface circuit, CAN interface circuit and memory module;
Described Hall element gather current signal and output voltage signal to described signal conditioning circuit, the voltage signal that described Hall element exports by described signal conditioning circuit carries out filtering interfering, voltage signal after filtering interfering carries out changing and provides stable digital signal to process to described microcontroller by described digital buffer circuit by described A/D change-over circuit, described RS485 interface circuit is for realizing the communication of microcontroller and host computer, the current data of collection is sent to vehicle control unit of electric vehicle by described CAN interface circuit, described memory module is used for the current data of storage of collected.
Preferably, described signal conditioning circuit comprises the first voltage follower and the second voltage follower;
The in-phase input end of the first voltage follower is by the first resistance connects the voltage output end of described Hall element, in-phase input end also connects described second voltage follower by the first capacity earth, output terminal in-phase input end.
Preferably, described A/D change-over circuit comprises an ADS1100A1 type conversion chip, and 1 pin of described ADS1100A1 type conversion chip connects the output terminal of described second voltage follower, 1 pin and to be also connected+5V voltage with the second resistance eutral grounding, 5 pin respectively by the second electric capacity, to be connected with the 3rd electric capacity between 5 pin and 6 pin.
Preferably, described digital buffer circuit comprises an ADUM1250 type digital isolator, and 1 pin connection+5V voltage of described ADUM1250 type digital isolator, 2 pin connect 4 pin of described ADS1100A1 type conversion chip and connect 3 pin of described ADS1100A1 type conversion chip by the 4th resistance connection+5V voltage, 3 pin and connect+5V voltage, 6 pin by the 6th resistance connection+5V voltage, 7 pin by the 5th resistance connection+5V voltage, 8 pin connection+5V voltages by the 3rd resistance.
Preferably, described Hall element is HAHIBV S/02 Hall element.
Preferably, described microcontroller is XC2267M type microcontroller.
Preferably, described first voltage follower and the second voltage follower are OP27GS type voltage follower.
Owing to have employed such scheme, the utility model utilizes HAHIBV S/02 Hall element to gather current signal, signal inputs in XC2267M type microcontroller after being isolated by conditioning, analog to digital conversion and numeral, this system have higher accuracy of detection, reliability high, accurate foundation can be provided for the estimation of electric automobile SoC, the part in actual applications as battery management system applies on electric automobile.
Accompanying drawing explanation
Fig. 1 is the system chart of the utility model embodiment;
Fig. 2 is the signal conditioning circuit figure of the utility model embodiment;
Fig. 3 is the A/D change-over circuit figure of the utility model embodiment;
Fig. 4 is the digital buffer circuit figure of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As shown in Figure 1, a kind of electric automobile power battery current detecting system of the present embodiment, it comprises Hall element 1, signal conditioning circuit 2, A/D change-over circuit 3, digital buffer circuit 4, microcontroller 5, RS485 interface circuit 7, CAN interface circuit 6 and memory module 8; Wherein, Hall element 1 is HAHIBV S/02 Hall element, and microcontroller is XC2267M type microcontroller.
Hall element 1 gather current signal and output voltage signal to signal conditioning circuit 2, the voltage signal that Hall element exports is carried out filtering interfering by signal conditioning circuit 2, voltage signal after filtering interfering carries out changing and provides stable digital signal to process to microcontroller 5 by digital buffer circuit 4 by A/D change-over circuit 3, RS485 interface circuit 7 is for realizing the communication of microcontroller 5 and host computer, the current data of collection is sent to vehicle control unit of electric vehicle by CAN interface circuit 6, and memory module 8 is for the current data of storage of collected.
As shown in Figure 2, the signal conditioning circuit 2 of the present embodiment comprises the first voltage follower U1 and the second voltage follower U2; First voltage follower U1 and the second voltage follower U2 is OP27GS type voltage follower.
The in-phase input end of the first voltage follower U1 is by the first resistance R1 connects the voltage output end of Hall element 1, in-phase input end also connects the second voltage follower U2 by the first electric capacity C1 ground connection, output terminal in-phase input end.Signal conditioning circuit 2 mainly utilizes the little characteristic filtering interfering of the large output resistance of the first voltage follower U1 input resistance to reach the object of reliably signal transmission, adopt the second voltage follower U2 can filtering interference signals and play the effect of isolation better, and RC filtering is taked to the input voltage of prime voltage follower.
As shown in Figure 3 and Figure 4, the A/D change-over circuit 3 of the present embodiment comprises an ADS1100A1 type conversion chip U3, and 1 pin of ADS1100A1 type conversion chip U3 connects the output terminal of the second voltage follower U2,1 pin and is also connected+5V voltage with the second resistance R2 ground connection, 5 pin respectively by the second electric capacity C2, is connected with the 3rd electric capacity C3 between 5 pin and 6 pin.
ADS1100A1 type conversion chip U3 adopts the mode of single ended input, and namely Vin+ pin connects the voltage signal that signal conditioning circuit 2 exports, the direct ground connection of Vin-pin, reference voltage V DD selection+5V.
The digital buffer circuit 4 of the present embodiment comprises an ADUM1250 type digital isolator U4,1 pin of ADUM1250 type digital isolator U4 connects+5V voltage, 2 pin connect 4 pin of ADS1100A1 type conversion chip U4 and connect+5V voltage by the 4th resistance R4,3 pin that 3 pin connect ADS1100A1 type conversion chips and connect+5V voltage by the 3rd resistance R3,6 pin connect+5V voltage by the 6th resistance R6,7 pin connect+5V voltage by the 5th resistance R5,8 pin connect+5V voltages.
ADUM1250 type digital isolator have employed the I of iCoupler technology
2c digital isolator, iCoupler technology ensure that I
2the bus of C agreement can not produce any burr or lockout issue.
A/D change-over circuit 3 is provide stable digital signal to XC2267M type microcontroller with the effect of digital buffer circuit 4, and the transmission of data adopts I
2c agreement.
In addition, RS485 interface circuit 7 realizes the communication of microcontroller 5 and host computer, to arrange the drift offset of electric current; CAN interface circuit 6 is mainly in order to send to vehicle control unit of electric vehicle and panel board the current data gathered; The current data that memory module 8 arrives for storage of collected, to check.
The current detecting system that the present embodiment utilizes HAH1BV S/02 Hall element to gather current signal has higher accuracy of detection, reliability is high, accurate foundation can be provided for the estimation of electric automobile SoC, will apply on electric automobile as a part for battery management system in actual applications.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. an electric automobile power battery current detecting system, is characterized in that: it comprises Hall element, signal conditioning circuit, A/D change-over circuit, digital buffer circuit, microcontroller, RS485 interface circuit, CAN interface circuit and memory module;
Described Hall element gather current signal and output voltage signal to described signal conditioning circuit, the voltage signal that described Hall element exports by described signal conditioning circuit carries out filtering interfering, voltage signal after filtering interfering carries out changing and provides stable digital signal to process to described microcontroller by described digital buffer circuit by described A/D change-over circuit, described RS485 interface circuit is for realizing the communication of microcontroller and host computer, the current data of collection is sent to vehicle control unit of electric vehicle by described CAN interface circuit, described memory module is used for the current data of storage of collected.
2. a kind of electric automobile power battery current detecting system as claimed in claim 1, is characterized in that: described signal conditioning circuit comprises the first voltage follower and the second voltage follower;
The in-phase input end of described first voltage follower is by the first resistance connects the voltage output end of described Hall element, in-phase input end also connects described second voltage follower by the first capacity earth, output terminal in-phase input end.
3. a kind of electric automobile power battery current detecting system as claimed in claim 2, it is characterized in that: described A/D change-over circuit comprises an ADS1100A1 type conversion chip, 1 pin of described ADS1100A1 type conversion chip connects the output terminal of described second voltage follower, 1 pin and to be also connected+5V voltage with the second resistance eutral grounding, 5 pin respectively by the second electric capacity, to be connected with the 3rd electric capacity between 5 pin and 6 pin.
4. a kind of electric automobile power battery current detecting system as claimed in claim 3, it is characterized in that: described digital buffer circuit comprises an ADUM1250 type digital isolator, 1 pin connection+5V voltage of described ADUM1250 type digital isolator, 2 pin connect 4 pin of described ADS1100A1 type conversion chip and connect 3 pin of described ADS1100A1 type conversion chip by the 4th resistance connection+5V voltage, 3 pin and connect+5V voltage, 6 pin by the 6th resistance connection+5V voltage, 7 pin by the 5th resistance connection+5V voltage, 8 pin connection+5V voltages by the 3rd resistance.
5. a kind of electric automobile power battery current detecting system as claimed in claim 1, is characterized in that: described Hall element is HAHIBV S/02 Hall element.
6. a kind of electric automobile power battery current detecting system as claimed in claim 1, is characterized in that: described microcontroller is XC2267M type microcontroller.
7. a kind of electric automobile power battery current detecting system as claimed in claim 2, is characterized in that: described first voltage follower and the second voltage follower are OP27GS type voltage follower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520190986.3U CN204666715U (en) | 2015-03-31 | 2015-03-31 | A kind of electric automobile power battery current detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520190986.3U CN204666715U (en) | 2015-03-31 | 2015-03-31 | A kind of electric automobile power battery current detecting system |
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| CN204666715U true CN204666715U (en) | 2015-09-23 |
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| CN201520190986.3U Expired - Fee Related CN204666715U (en) | 2015-03-31 | 2015-03-31 | A kind of electric automobile power battery current detecting system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684476A (en) * | 2017-02-22 | 2017-05-17 | 安徽师范大学 | Lithium battery management system |
| CN107015042A (en) * | 2017-04-28 | 2017-08-04 | 镇江科信动力系统设计研究有限公司 | A kind of anti-interference, high precision electro flow detection device based on current divider |
| CN107179511A (en) * | 2017-06-16 | 2017-09-19 | 龙海特尔福汽车电子研究所有限公司 | The circuit structure and method of a kind of charging and discharging currents detection |
| CN108205077A (en) * | 2016-12-16 | 2018-06-26 | 联合汽车电子有限公司 | Current sensing means, current detecting system and electric current detecting method |
| CN110174550A (en) * | 2019-07-12 | 2019-08-27 | 上海星融汽车科技有限公司 | Vehicle circuitry and sensor detection device |
| CN112162141A (en) * | 2020-09-27 | 2021-01-01 | 济南浪潮高新科技投资发展有限公司 | Current detection device and circuit detection method |
| CN116915021A (en) * | 2023-07-12 | 2023-10-20 | 北京市科通电子继电器总厂有限公司 | Solid-state power controller |
| CN116915021B (en) * | 2023-07-12 | 2024-04-26 | 北京市科通电子继电器总厂有限公司 | Solid-state power controller |
-
2015
- 2015-03-31 CN CN201520190986.3U patent/CN204666715U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108205077A (en) * | 2016-12-16 | 2018-06-26 | 联合汽车电子有限公司 | Current sensing means, current detecting system and electric current detecting method |
| CN106684476A (en) * | 2017-02-22 | 2017-05-17 | 安徽师范大学 | Lithium battery management system |
| CN106684476B (en) * | 2017-02-22 | 2023-04-07 | 安徽师范大学 | Lithium battery management system |
| CN107015042A (en) * | 2017-04-28 | 2017-08-04 | 镇江科信动力系统设计研究有限公司 | A kind of anti-interference, high precision electro flow detection device based on current divider |
| CN107179511A (en) * | 2017-06-16 | 2017-09-19 | 龙海特尔福汽车电子研究所有限公司 | The circuit structure and method of a kind of charging and discharging currents detection |
| CN110174550A (en) * | 2019-07-12 | 2019-08-27 | 上海星融汽车科技有限公司 | Vehicle circuitry and sensor detection device |
| CN112162141A (en) * | 2020-09-27 | 2021-01-01 | 济南浪潮高新科技投资发展有限公司 | Current detection device and circuit detection method |
| CN116915021A (en) * | 2023-07-12 | 2023-10-20 | 北京市科通电子继电器总厂有限公司 | Solid-state power controller |
| CN116915021B (en) * | 2023-07-12 | 2024-04-26 | 北京市科通电子继电器总厂有限公司 | Solid-state power controller |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20180331 |