CN203786271U - Device for testing state of charge (SOC) of electric automobile battery pack - Google Patents
Device for testing state of charge (SOC) of electric automobile battery pack Download PDFInfo
- Publication number
- CN203786271U CN203786271U CN201420197151.6U CN201420197151U CN203786271U CN 203786271 U CN203786271 U CN 203786271U CN 201420197151 U CN201420197151 U CN 201420197151U CN 203786271 U CN203786271 U CN 203786271U
- Authority
- CN
- China
- Prior art keywords
- unit
- voltage
- circuit
- input end
- electric automobile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model provides a device for testing the state of charge (SOC) of an electric automobile battery pack. A voltage sensor is connected with an open-circuit voltage estimation unit through a voltage detection unit. A current sensor is connected with an ampere hour integration estimation unit through a current detection unit. A temperature sensor is connected with the open-circuit voltage estimation unit and the ampere hour integration estimation unit through a temperature detection unit. Output ends of the open-circuit voltage estimation unit and the ampere hour integration estimation unit are connected with an input end of a central control unit at the same time. A memory unit is connected with the central control unit. The central control unit is connected with control ends of the voltage detection unit, the temperature detection unit, the current detection unit, the open-circuit voltage estimation unit, the ampere hour integration estimation unit, the memory unit, the alarm unit and a display unit. The central control unit is connected with a vehicle control unit of an electric automobile through a communication unit. The device is high in estimation precision and easy to achieve, and can achieve real-time online accurate detection on the SOC of the electric automobile battery pack.
Description
Technical field
The utility model relates to electric vehicle engineering field, is specifically related to a kind of electric automobile power battery group state-of-charge pick-up unit.
Background technology
Electrokinetic cell is the important component part of electric automobile, and its state-of-charge (state of charge, SOC) is for diagnosing cell health state and judge the battery important evidence whether mistake discharges and recharges etc.Because battery in use shows nonlinearity, and its capacity is subject to charge-discharge magnification, temperature, self discharge, the various factors such as aging, real-time online accurately estimates that electrokinetic cell SOC difficulty is very large, becomes one of the focus of the research of battery management system in recent years and difficult point.At present, the evaluation method of electric automobile power battery SOC mainly contains: the several different methods such as discharge test method, neural network, Kalman filtering method, ampere-hour integral method, open-circuit voltage method.Wherein discharge test method is the most reliable SOC method of estimation, easily realizes, in the laboratory of being everlasting, use, but cannot be on real vehicle On-line Estimation.Although neural network can On-line Estimation, needs mass data to train, evaluated error is subject to the impact of training data and training method very large.Kalman filtering rule is high to battery model precision and system-computed Capability Requirement, and application cost is higher, does not possess advantage.Ampere-hour integral method is SOC method of estimation the most frequently used in engineering practice, directly obvious, simple, but shortcoming is to can not determine SOC initial value, and has cumulative errors.Open-circuit voltage method is because needs battery is standing for a long time, and the real-time online that is not suitable for batteries of electric automobile SOC is estimated.
Utility model content
The utility model provides a kind of electric automobile power battery group state-of-charge pick-up unit, and it has the advantages that estimation precision is high and be easy to realize, and can realize the real-time online of electric automobile power battery group SOC value is accurately detected.
For addressing the above problem, a kind of electric automobile power battery group state-of-charge pick-up unit that the utility model is designed, is mainly comprised of voltage detection unit, temperature detecting unit, current detecting unit, open-circuit voltage evaluation unit, ampere-hour integration evaluation unit, storage unit, central control unit, alarm unit, communication unit and display unit; Wherein the input end of voltage detection unit is connected with the voltage sensor being arranged in the power battery pack of electric automobile, the input end of temperature detecting unit is connected with the temperature sensor being arranged in the power battery pack of electric automobile, and the input end of current detecting unit is connected with the current sensor being arranged in the power battery pack of electric automobile; The output terminal of temperature detecting unit is divided into an input end that connects respectively open-circuit voltage evaluation unit and ampere-hour integration evaluation unit behind 2 tunnels, the output terminal of voltage detection unit connects another input end of open-circuit voltage evaluation unit, and the output terminal of current detecting unit connects another input end of ampere-hour integration evaluation unit; The output terminal of open-circuit voltage evaluation unit connects the input end of central control unit; The output terminal of ampere-hour integration evaluation unit connects another input end of central control unit; Storage unit is connected with central control unit; Central control unit connects respectively the control end of voltage detection unit, temperature detecting unit, current detecting unit, open-circuit voltage evaluation unit, ampere-hour integration evaluation unit, storage unit, alarm unit and display unit; Central control unit is connected with the car load control module of electric automobile through communication unit.
In such scheme, described communication unit is CAN bus transceiver, and one end of this CAN bus transceiver is connected with the CAN controller of central control unit through electrical lead, and the other end is connected with car load control module through CAN bus.
In such scheme, described display unit is LCDs.
In such scheme, described alarm unit is phonetic alarm.
In such scheme, described voltage detection unit consists of voltage signal conditioning circuit and voltage A/D change-over circuit, wherein voltage signal conditioning circuit is connected with voltage sensor, the output terminal of voltage signal conditioning circuit is connected with the input end of voltage A/D change-over circuit, the output terminal of voltage A/D change-over circuit is connected with open-circuit voltage evaluation unit, and the control end of voltage A/D change-over circuit is connected with central control unit.
In such scheme, described temperature detecting unit consists of temperature signal regulation circuit and temperature A/D change-over circuit, wherein temperature signal regulation circuit is connected with temperature sensor, the output terminal of temperature signal regulation circuit is connected with the input end of temperature A/D change-over circuit, the output terminal of temperature A/D change-over circuit is connected with ampere-hour integration evaluation unit with open-circuit voltage evaluation unit, and the control end of temperature A/D change-over circuit is connected with central control unit.
In such scheme, described current detecting unit consists of current signal conditioning circuit and electric current A/D change-over circuit, wherein current signal conditioning circuit is connected with current sensor, the output terminal of current signal conditioning circuit is connected with the input end of electric current A/D change-over circuit, the output terminal of electric current A/D change-over circuit is connected with ampere-hour integration evaluation unit, and the control end of electric current A/D change-over circuit is connected with central control unit.
Compared with prior art, the structure that the utility model adopts ampere-hour integration evaluation unit to combine with open-circuit voltage evaluation unit, but not existing single ampere-hour integration evaluation unit is estimated the SOC value of power battery pack real-time and accurately, utilize open-circuit voltage evaluation unit discharging and recharging the good estimation effect of initial stage to SOC, power battery pack SOC initial value is estimated, efficiently solve ampere-hour integral method and can not determine the problem of initial value, improved the precision of SOC value estimation, for human pilot provides battery dump energy information accurately; Secondly, the utility model can be reported to the police over the situation of predetermined threshold value to power battery pack SOC value, prevents over-charging of battery, crosses and put, and can effectively protect battery, avoids battery impaired; Moreover the utility model adopts CAN communication mode, antijamming capability is strong, long transmission distance, and transmission speed is fast, and in automobile is controlled, application is extremely extensive.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of a kind of electric automobile power battery group of the utility model state-of-charge pick-up unit.
Fig. 2 is the structural representation of voltage detection unit.
Fig. 3 is the structural representation of temperature detecting unit.
Fig. 4 is the structural representation of current detecting unit.
Embodiment
A kind of electric automobile power battery group state-of-charge pick-up unit, as shown in Figure 1, it is mainly comprised of voltage detection unit, temperature detecting unit, current detecting unit, open-circuit voltage evaluation unit, ampere-hour integration evaluation unit, storage unit, central control unit, alarm unit, communication unit and display unit.
The input end of voltage detection unit is connected with the voltage sensor being arranged in the power battery pack of electric automobile, the input end of temperature detecting unit is connected with the temperature sensor being arranged in the power battery pack of electric automobile, and the input end of current detecting unit is connected with the current sensor being arranged in the power battery pack of electric automobile.The output terminal of temperature detecting unit is divided into an input end that connects respectively open-circuit voltage evaluation unit and ampere-hour integration evaluation unit behind 2 tunnels, the output terminal of voltage detection unit connects another input end of open-circuit voltage evaluation unit, and the output terminal of current detecting unit connects another input end of ampere-hour integration evaluation unit.In the utility model preferred embodiment, described voltage detection unit consists of voltage signal conditioning circuit and voltage A/D change-over circuit, wherein voltage signal conditioning circuit is connected with voltage sensor, the output terminal of voltage signal conditioning circuit is connected with the input end of voltage A/D change-over circuit, the output terminal of voltage A/D change-over circuit is connected with open-circuit voltage evaluation unit, the control end of voltage A/D change-over circuit is connected with central control unit, referring to Fig. 2.Described temperature detecting unit consists of temperature signal regulation circuit and temperature A/D change-over circuit, wherein temperature signal regulation circuit is connected with temperature sensor, the output terminal of temperature signal regulation circuit is connected with the input end of temperature A/D change-over circuit, the output terminal of temperature A/D change-over circuit is connected with ampere-hour integration evaluation unit with open-circuit voltage evaluation unit, the control end of temperature A/D change-over circuit is connected with central control unit, referring to Fig. 3.Described current detecting unit consists of current signal conditioning circuit and electric current A/D change-over circuit, wherein current signal conditioning circuit is connected with current sensor, the output terminal of current signal conditioning circuit is connected with the input end of electric current A/D change-over circuit, the output terminal of electric current A/D change-over circuit is connected with ampere-hour integration evaluation unit, the control end of electric current A/D change-over circuit is connected with central control unit, referring to Fig. 4.
The output terminal of open-circuit voltage evaluation unit connects the input end of central control unit.The output terminal of ampere-hour integration evaluation unit connects another input end of central control unit.Storage unit is connected with central control unit.Central control unit connects respectively the control end of voltage detection unit, temperature detecting unit, current detecting unit, open-circuit voltage evaluation unit, ampere-hour integration evaluation unit, storage unit, alarm unit and display unit.Central control unit is connected with the car load control module of electric automobile through communication unit.In the present embodiment, described communication unit is CAN bus transceiver, and one end of this CAN bus transceiver is connected with the CAN controller of central control unit through electrical lead, and the other end is connected with car load control module through CAN bus.Described display unit is LCDs.Described alarm unit is phonetic alarm.
The course of work of the present utility model is as follows: voltage detection unit, temperature detecting unit, current detecting unit collect respectively voltage, temperature, the current signal of power battery pack by voltage sensor, temperature sensor, current sensor, above-mentioned signal after the circuit such as signal condition and A/D conversion, is input in corresponding evaluation unit respectively.Open-circuit voltage evaluation unit receives after the voltage that discharges and recharges initial time that voltage detection unit and temperature detecting unit gather, temperature signal, according to voltage, temperature, adopts the SOC initial value of open-circuit voltage method real-time estimation power battery pack and sends central control unit to.Ampere-hour integration evaluation unit receives after electric current that current detecting unit and temperature detecting unit gather, temperature signal, and the SOC initial value calculating according to electric current, temperature and open-circuit voltage evaluation unit adopts the SOC value of ampere-hour integral method real-time estimation power battery pack also to send central control unit to.Central control unit is sent data such as received voltage, temperature, electric current, SOC values into storage unit and is stored; And by communication unit, received voltage, temperature, electric current and the information such as SOC value calculated are real-time transmitted to car load control module; Received voltage, temperature, electric current and the information exchanges such as SOC value that calculate are crossed to display unit simultaneously and show in real time, for automobile driver, understand in real time dump energy situation and the mileage thereof of power battery pack.When the SOC of power battery pack value surpasses the threshold value set, by alarm unit, carry out audio alert, effectively avoid electrokinetic cell to suffer damage because of deep discharge.
Claims (7)
1. an electric automobile power battery group state-of-charge pick-up unit, is characterized in that: mainly voltage detection unit, temperature detecting unit, current detecting unit, open-circuit voltage evaluation unit, ampere-hour integration evaluation unit, storage unit, central control unit, alarm unit, communication unit and display unit, consist of; Wherein the input end of voltage detection unit is connected with the voltage sensor being arranged in the power battery pack of electric automobile, the input end of temperature detecting unit is connected with the temperature sensor being arranged in the power battery pack of electric automobile, and the input end of current detecting unit is connected with the current sensor being arranged in the power battery pack of electric automobile; The output terminal of temperature detecting unit is divided into an input end that connects respectively open-circuit voltage evaluation unit and ampere-hour integration evaluation unit behind 2 tunnels, the output terminal of voltage detection unit connects another input end of open-circuit voltage evaluation unit, and the output terminal of current detecting unit connects another input end of ampere-hour integration evaluation unit; The output terminal of open-circuit voltage evaluation unit connects the input end of central control unit; The output terminal of ampere-hour integration evaluation unit connects another input end of central control unit; Storage unit is connected with central control unit; Central control unit connects respectively the control end of voltage detection unit, temperature detecting unit, current detecting unit, open-circuit voltage evaluation unit, ampere-hour integration evaluation unit, storage unit, alarm unit and display unit; Central control unit is connected with the car load control module of electric automobile through communication unit.
2. a kind of electric automobile power battery group state-of-charge pick-up unit according to claim 1, it is characterized in that: described communication unit is CAN bus transceiver, one end of this CAN bus transceiver is connected with the CAN controller of central control unit through electrical lead, and the other end is connected with car load control module through CAN bus.
3. a kind of electric automobile power battery group state-of-charge pick-up unit according to claim 1, is characterized in that: described display unit is LCDs.
4. a kind of electric automobile power battery group state-of-charge pick-up unit according to claim 1, is characterized in that: described alarm unit is phonetic alarm.
5. according to a kind of electric automobile power battery group state-of-charge pick-up unit described in any one in claim 1～4, it is characterized in that: described voltage detection unit consists of voltage signal conditioning circuit and voltage A/D change-over circuit, wherein the input end of voltage signal conditioning circuit is connected with voltage sensor, the output terminal of voltage signal conditioning circuit is connected with the input end of voltage A/D change-over circuit, the output terminal of voltage A/D change-over circuit is connected with open-circuit voltage evaluation unit, and the control end of voltage A/D change-over circuit is connected with central control unit.
6. according to a kind of electric automobile power battery group state-of-charge pick-up unit described in any one in claim 1～4, it is characterized in that: described temperature detecting unit consists of temperature signal regulation circuit and temperature A/D change-over circuit, wherein the input end of temperature signal regulation circuit is connected with temperature sensor, the output terminal of temperature signal regulation circuit is connected with the input end of temperature A/D change-over circuit, the output terminal of temperature A/D change-over circuit is connected with ampere-hour integration evaluation unit with open-circuit voltage evaluation unit, the control end of temperature A/D change-over circuit is connected with central control unit.
7. according to a kind of electric automobile power battery group state-of-charge pick-up unit described in any one in claim 1～4, it is characterized in that: described current detecting unit consists of current signal conditioning circuit and electric current A/D change-over circuit, wherein the input end of current signal conditioning circuit is connected with current sensor, the output terminal of current signal conditioning circuit is connected with the input end of electric current A/D change-over circuit, the output terminal of electric current A/D change-over circuit is connected with ampere-hour integration evaluation unit, and the control end of current detecting unit is connected with central control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197151.6U CN203786271U (en) | 2014-04-22 | 2014-04-22 | Device for testing state of charge (SOC) of electric automobile battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197151.6U CN203786271U (en) | 2014-04-22 | 2014-04-22 | Device for testing state of charge (SOC) of electric automobile battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203786271U true CN203786271U (en) | 2014-08-20 |
Family
ID=51322445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420197151.6U Expired - Fee Related CN203786271U (en) | 2014-04-22 | 2014-04-22 | Device for testing state of charge (SOC) of electric automobile battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203786271U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678316A (en) * | 2015-02-28 | 2015-06-03 | 北京交通大学 | Method and device for estimating charge state of lithium ion battery |
| CN105774574A (en) * | 2016-02-26 | 2016-07-20 | 北京长城华冠汽车科技股份有限公司 | New energy automobile battery state-of-charge calibration method and device |
| CN106740131A (en) * | 2016-12-20 | 2017-05-31 | 德州富路汽车智能化研究有限公司 | The monitoring method of electric quantity of batteries of electric vehicle, apparatus and system, monitoring server |
| CN107958967A (en) * | 2016-10-18 | 2018-04-24 | 南京金邦动力科技有限公司 | A kind of accumulator of electric car of self-inspection data |
| CN109425829A (en) * | 2017-08-31 | 2019-03-05 | 加百裕工业股份有限公司 | Lithium battery capacity check method |
| CN109725259A (en) * | 2019-01-25 | 2019-05-07 | 格林美股份有限公司 | A kind of electri forklift electricity monitoring system and method |
| CN109991548A (en) * | 2019-04-19 | 2019-07-09 | 中国计量大学 | A kind of OCV-SOC method of calibration experiment, battery equivalent model parameter identification method and SOC estimation method |
-
2014
- 2014-04-22 CN CN201420197151.6U patent/CN203786271U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678316A (en) * | 2015-02-28 | 2015-06-03 | 北京交通大学 | Method and device for estimating charge state of lithium ion battery |
| CN104678316B (en) * | 2015-02-28 | 2017-08-01 | 北京交通大学 | Charge states of lithium ion battery evaluation method and device |
| CN105774574A (en) * | 2016-02-26 | 2016-07-20 | 北京长城华冠汽车科技股份有限公司 | New energy automobile battery state-of-charge calibration method and device |
| CN107958967A (en) * | 2016-10-18 | 2018-04-24 | 南京金邦动力科技有限公司 | A kind of accumulator of electric car of self-inspection data |
| CN106740131A (en) * | 2016-12-20 | 2017-05-31 | 德州富路汽车智能化研究有限公司 | The monitoring method of electric quantity of batteries of electric vehicle, apparatus and system, monitoring server |
| CN109425829A (en) * | 2017-08-31 | 2019-03-05 | 加百裕工业股份有限公司 | Lithium battery capacity check method |
| CN109725259A (en) * | 2019-01-25 | 2019-05-07 | 格林美股份有限公司 | A kind of electri forklift electricity monitoring system and method |
| CN109991548A (en) * | 2019-04-19 | 2019-07-09 | 中国计量大学 | A kind of OCV-SOC method of calibration experiment, battery equivalent model parameter identification method and SOC estimation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203786271U (en) | Device for testing state of charge (SOC) of electric automobile battery pack | |
| EP2801837B1 (en) | Device and method for measuring insulation resistance of battery | |
| CN103715737B (en) | A kind of charging and discharging lithium battery management system | |
| CN103399277B (en) | A kind of power battery actual capacity estimation method | |
| CN103698713A (en) | Method for assessing SOH (state of health) of lithium ion battery | |
| CN203798989U (en) | SOC detection device for power battery pack of electromobile | |
| CN103869252A (en) | Plug-in charge capacity estimation method for lithium iron-phosphate batteries | |
| CN103901354A (en) | Methods for predicting SOC of vehicle-mounted power battery of electric automobile | |
| CN105021996A (en) | Battery SOH (section of health) estimation method of energy storage power station BMS (battery management system) | |
| CN101174711A (en) | Battery management system and driving method thereof | |
| CN102468521A (en) | Method and apparatus for assessing battery state of health | |
| CN102565710A (en) | Method and apparatus for assessing battery state of health | |
| CN104237795A (en) | Detection of Imbalance Across Multiple Battery Cells Measured by the Same Voltage Sensor | |
| CN111025168A (en) | Battery health state monitoring device and battery state of charge intelligent estimation method | |
| CN102608540A (en) | Coulomb efficiency measuring method used for SOC (system-on-chip) evaluation of power battery | |
| CN104391252A (en) | Automobile lead-acid battery health state detection method | |
| CN104483628A (en) | Electric vehicle battery pack state-of-health detection device and method | |
| CN103713264A (en) | Battery management system SOC estimation precision test system and test method | |
| CN107634277A (en) | A kind of automobile high in the clouds battery management system based on wireless telecommunications battery core | |
| CN104407301A (en) | Dynamic intelligent detection device and detection method for storage battery of electric automobile | |
| CN203632319U (en) | Lithium battery charging/discharging management system | |
| CN103267953A (en) | Estimation method of SOC (State of Charge) of lithium iron phosphate power battery | |
| CN111483350A (en) | Balance and micro-short circuit detection method for power battery pack | |
| CN102343831B (en) | System and method for rebalancing a vehicle battery | |
| CN103580070A (en) | Electric vehicle charging and discharging simulation system and method |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20160422 |