CN105677901A - Method and system for determining State of Charge (SOC) of power battery - Google Patents
Method and system for determining State of Charge (SOC) of power battery Download PDFInfo
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- CN105677901A CN105677901A CN201610081456.4A CN201610081456A CN105677901A CN 105677901 A CN105677901 A CN 105677901A CN 201610081456 A CN201610081456 A CN 201610081456A CN 105677901 A CN105677901 A CN 105677901A
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Abstract
The invention discloses a method and a system for determining the State of Charge (SOC) of a power battery. The method comprises the following steps: setting a database on the network side to store historical running data and historical performance data of the power battery on each electric automobile according to an identification of each electric automobile, wherein when a server on the network side receives a request, which is transmitted by the electric automobile, for acquiring the current SOC of the vehicle-mounted power battery, the request carries the current running data of the power battery, and the server on the network side matches the stored historical performance data of the power battery with the stored historical performance data of other power batteries to acquire matched historical running data of other power batteries; acquiring the matched historical running data according to the current running data, carried by the SOC request, of the power battery, calculating the SOC of the electric automobile according to the matched historical running data of other power batteries, and transmitting the SOC to the electric automobile. The method disclosed by the invention can accurately determine the SOC of the power battery.
Description
Technical field
The present invention relates to electric automobile field, particularly to the determination method and system of the state-of-charge of a kind of electrokinetic cell.
Background technology
New-energy automobile, especially electric automobile are the development trends of following trip instrument. Electrokinetic cell is the component units of new-energy automobile dynamical system, knows that the state-of-charge (SOC, StateofCharge) of electrokinetic cell directly influences the charge-discharge performance of electrokinetic cell in time, and then affects vehicle performance and the safety of electric automobile.
At present, electric automobile to know that the method for the SOC of the electrokinetic cell of carrying is: the battery management system (BMS of electric automobile, BatteryManagementSystem) calculating SOC formula it is provided with, the voltage of the dynamic battery of parameter, electric current and the temperature that this SOC formula relates to, therefore, the BMS of electric automobile collects the voltage of electrokinetic cell, electric current and temperature, then the voltage of the electrokinetic cell collected, electric current and temperature are updated in set SOC formula, calculate the SOC obtaining current electrokinetic cell.
But, owing to the SOC of electrokinetic cell is not merely limited to include the current operating data of the current voltage of electrokinetic cell, electric current and temperature, it is also limited to the current performance data including the current charge-discharge performance of electrokinetic cell and electrokinetic cell current drain performance, if being based only on the current operating data of electrokinetic cell, calculate the SOC obtaining electrokinetic cell according to set SOC formula, then the SOC of calculated electrokinetic cell is not accurate enough. Further, based on the SOC of inaccurate electrokinetic cell, the BMS of electric automobile implements the charge and discharge process of follow-up electrokinetic cell, then can damage electrokinetic cell so that the life value of electrokinetic cell reduces, and then affects vehicle performance and the safety of electric automobile.
Summary of the invention
It is an object of the invention to provide the defining method of the state-of-charge of a kind of electrokinetic cell, the method can accurately determine the SOC of electrokinetic cell.
The present invention also provides for the determination system of the state-of-charge of a kind of electrokinetic cell, and this system can accurately determine the SOC of electrokinetic cell.
Specifically, including:
A kind of defining method of the state-of-charge of electrokinetic cell, described method is applied in the car networking being made up of electric automobile and server, including:
History data and History Performance Data that each electric automobile in map network identifies the electrokinetic cell storing the carrying of each electric automobile store in the data base arranged;
Server receives the state-of-charge SOC request of the current power battery obtaining carrying electrokinetic cell that electric automobile sends, and the service data that described electrokinetic cell is current is carried in described request;
The History Performance Data of described electrokinetic cell of storage is mated by described server with the historic performance data of other electrokinetic cells of storage, obtains the history data of other electrokinetic cells matched;
The current operating data of the described electrokinetic cell that described server carries according to SOC request, obtain the history data that other electrokinetic cells match, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, is sent to described electric automobile.
It is preferred that the History Performance Data of the electrokinetic cell of described electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, wherein,
Described health data includes one or more combinations in the operation time of electric automobile, circuit and fault message.
It is preferred that the history data of the electrokinetic cell of described electric automobile carrying includes: the voltage of electrokinetic cell, electric current and temperature, also include the SOC of correspondence.
It is preferred that the History Performance Data of the electrokinetic cell of described electric automobile carrying and History Performance Data are reported by electric automobile corresponding electric automobile mark in real time.
It is preferred that other electrokinetic cells of the history data of other electrokinetic cells matched described in having are more than one;
The described history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile:
The SOC of the history data matched of other electrokinetic cells is averaged and obtains.
It is preferred that other electrokinetic cells of the history data of other electrokinetic cells matched described in having are more than one;
The described history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile:
Current operating data according to the described electrokinetic cell that SOC request is carried, after adopting the calculating of SOC formula to obtain benchmark SOC, after being weighted in the SOC of the history data matched of other electrokinetic cells, obtains SOC.
A kind of determination system of the state-of-charge of electrokinetic cell, including: data base (201) and server (202), wherein,
Data base (201), identifies history data and the History Performance Data of the electrokinetic cell storing the carrying of each electric automobile for each electric automobile in map network;
Server (202), for receiving the current state-of-charge SOC request obtaining carrying electrokinetic cell that electric automobile sends, the service data that described electrokinetic cell is current is carried in described request; The History Performance Data of described electrokinetic cell data base 201 stored mates with the historic performance data of other electrokinetic cells of storage, obtains the history data of other electrokinetic cells matched;The current operating data asking the described electrokinetic cell carried according to SOC gets the history data that other electrokinetic cells match, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, is sent to described electric automobile.
It is preferred that the History Performance Data of the electrokinetic cell of described electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, wherein,
Described health data includes one or more combinations in the operation time of electric automobile, circuit and fault message.
It is preferred that the history data of the electrokinetic cell of described electric automobile carrying includes: the voltage of electrokinetic cell, electric current and temperature, also include the SOC of correspondence.
According to each embodiment above, the defining method of the SOC of electrokinetic cell provided by the invention, at network side, data base is set, corresponding each electric automobile mark stores history data and the History Performance Data of the electrokinetic cell of each electric automobile carrying, when the server of network side receives the current SOC request obtaining carrying electrokinetic cell that electric automobile sends, the service data that described electrokinetic cell is current is carried in described request, the History Performance Data of described electrokinetic cell of storage is mated by the server of network side with the historic performance data of other electrokinetic cells of storage, obtain the history data of other electrokinetic cells matched, the current operating data asking the described electrokinetic cell carried according to SOC gets the history data wherein matched, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, it is sent to described electric automobile. owing to the present invention is not merely based on the current voltage of electrokinetic cell of electric automobile carrying, electric current and temperature when determining the SOC of electrokinetic cell of electric automobile, but also based on the current charge-discharge performance of described electrokinetic cell and electrokinetic cell current drain performance, accurately determine the SOC of electrokinetic cell, thus when the BMS of electric automobile implements the charge and discharge process of follow-up electrokinetic cell according to the SOC after calibration, electrokinetic cell will not be damaged, the life value making electrokinetic cell promotes, and then improves vehicle performance and the safety of electric automobile.
Accompanying drawing explanation
The present invention is only schematically illustrated and explains by the following drawings, not delimit the scope of the invention.
Fig. 1 is the determination method flow diagram of the state-of-charge of the electrokinetic cell in an embodiment;
Fig. 2 is the determination system structure schematic diagram of the state-of-charge of the electrokinetic cell in an embodiment.
Label declaration
201 data bases
202 servers
Detailed description of the invention
In order to the technical characteristic of invention, purpose and effect are more clearly understood from, now comparison accompanying drawing illustrates the specific embodiment of the present invention, and label identical in the various figures represents identical part.
In this article, " schematically " expression " serves as example, example or explanation ", should will not be construed to a kind of preferred or more advantage technical scheme described herein as any diagram of " schematically ", embodiment.
For making simplified form, each figure only schematically show part related to the present invention, and do not represent its practical structures as product. It addition, so that simplified form readily appreciates, some figure has the parts of identical structure or function, only symbolically depict one of them, or only mark one of them.
Can be seen that from background technology, when the SOC that the electrokinetic cell calculating electric automobile carrying is current, inaccurate reason is primarily due to be based only on the current operating data of electrokinetic cell, and does not take into account the current performance data of the SOC that also can affect electrokinetic cell. Therefore, in one embodiment, building the network of an electric automobile, network side arrange data base, corresponding each electric automobile mark stores history data and the History Performance Data of the electrokinetic cell of each electric automobile carrying. When the SOC that the electrokinetic cell calculating electric automobile carrying is current, the history data of the electrokinetic cell carried according to electric automobile by the server of network side and the current service data of acquisition are calculated obtaining, fully take into account the factor of the SOC affecting electrokinetic cell, so that the SOC of calculated electrokinetic cell is accurate.
Fig. 1 is the determination method flow diagram of the state-of-charge of the electrokinetic cell in an embodiment, and it concretely comprises the following steps:
Step 101, arranging data base at network side, each electric automobile mark in map network stores history data and the History Performance Data of the electrokinetic cell of each electric automobile carrying;
Step 102, the current SOC obtaining carrying electrokinetic cell that the server reception electric automobile of network side sends ask, and the service data that described electrokinetic cell is current is carried in described request;
Step 103, network side server the History Performance Data of described electrokinetic cell of storage is mated with the historic performance data of other electrokinetic cells of storage, the history data of other electrokinetic cells that acquisition matches;
Step 104, the current operating data of described electrokinetic cell that the server of network side carries according to SOC request get the history data that other electrokinetic cells match, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, is sent to described electric automobile.
In one embodiment, network is car networking, is made up of the server of multiple electric automobiles and network side, each other by network interaction data. The data base arranged at network side can become an entity with the server set of network side.
In one embodiment, the History Performance Data of the electrokinetic cell of electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, described health data can include the operation time of electric automobile, circuit and fault message etc., these are reported network side by electric automobile corresponding electric automobile mark in real time, by network side storing to the History Performance Data of corresponding electric automobile mark.
In one embodiment, the history data of the electrokinetic cell of electric automobile carrying includes: the voltage of electrokinetic cell, electric current and temperature, also includes the SOC of correspondence, and wherein, corresponding SOC adopts the method described in Fig. 1 calculated. These are reported network side by electric automobile corresponding electric automobile mark in real time, by network side storing to the history data of corresponding electric automobile mark.
Other electrokinetic cells that step 103 in one embodiment acquires can be more than one, when other electrokinetic cells are multiple, the process of the SOC obtaining described electric automobile according to the history data the matched calculating of other electrokinetic cells at step 104 is:
The SOC of the history data matched of other electrokinetic cells is averaged and obtains;
Or the current operating data according to the described electrokinetic cell that SOC request is carried, after adopting the calculating of SOC formula to obtain benchmark SOC, after the SOC of the history data matched of other electrokinetic cells is weighted, obtain SOC, wherein weight coefficient pre-sets in the server, arranges according to technical experience.
Due to when calculating the current SOC of electrokinetic cell of a certain electric automobile carrying, SOC based on other electrokinetic cells with identical service data and performance data determines, so when calculating, not only consider current service data, and consider the performance data of described electrokinetic cell, this performance data acquires from other electric automobiles, therefore more accurate.
Fig. 2 is the determination system structure schematic diagram of the state-of-charge of the electrokinetic cell in an embodiment, including: data base 201 and server 202, wherein,
Data base 201, identify history data and the History Performance Data of the electrokinetic cell storing the carrying of each electric automobile for each electric automobile in map network;
Server 202, for receiving the current SOC request obtaining carrying electrokinetic cell that electric automobile sends, the service data that described electrokinetic cell is current is carried in described request; The History Performance Data of described electrokinetic cell data base 201 stored mates with the historic performance data of other electrokinetic cells of storage, obtains the history data of other electrokinetic cells matched; The current operating data asking the described electrokinetic cell carried according to SOC gets the history data that other electrokinetic cells match, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, is sent to described electric automobile.
In one embodiment, the History Performance Data of the electrokinetic cell of electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, described health data can include the operation time of electric automobile, circuit and fault message etc., these are reported network side by electric automobile corresponding electric automobile mark in real time, by network side storing to the History Performance Data of corresponding electric automobile mark.
In one embodiment, the History Performance Data of the electrokinetic cell of electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, described health data can include the operation time of electric automobile, circuit and fault message etc., these are reported network side by electric automobile corresponding electric automobile mark in real time, by network side storing to the History Performance Data of corresponding electric automobile mark.
It is not merely based on the current voltage of the electrokinetic cell of electric automobile carrying when determining the SOC of electrokinetic cell of electric automobile due to embodiment, electric current and temperature, but also based on the current charge-discharge performance of described electrokinetic cell and electrokinetic cell current drain performance (obtaining with reference to the History Performance Data of other electric automobiles with identical History Performance Data), accurately determine the SOC of electrokinetic cell, thus when the BMS of electric automobile implements the charge and discharge process of follow-up electrokinetic cell according to the SOC after calibration, electrokinetic cell will not be damaged, the life value making electrokinetic cell promotes, and then improve vehicle performance and the safety of electric automobile.
It is to be understood that, although this specification describes according to each embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
The a series of detailed description of those listed above is only for illustrating of the feasibility embodiment of the present invention; and and be not used to limit the scope of the invention; all without departing from the spiritual equivalent embodiments made of skill of the present invention or change; such as the combination of feature, segmentation or repetition, should be included within protection scope of the present invention.
Claims (9)
1. the defining method of the state-of-charge of an electrokinetic cell, it is characterised in that described method is applied in the car networking being made up of electric automobile and server, including:
History data and History Performance Data that each electric automobile in map network identifies the electrokinetic cell storing the carrying of each electric automobile store in the data base arranged;
Server receives the state-of-charge SOC request of the current power battery obtaining carrying electrokinetic cell that electric automobile sends, and the service data that described electrokinetic cell is current is carried in described request;
The History Performance Data of described electrokinetic cell of storage is mated by described server with the historic performance data of other electrokinetic cells of storage, obtains the history data of other electrokinetic cells matched;
The current operating data of the described electrokinetic cell that described server carries according to SOC request, obtain the history data that other electrokinetic cells match, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, is sent to described electric automobile.
2. defining method as claimed in claim 1, it is characterised in that the History Performance Data of the electrokinetic cell of described electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, wherein,
Described health data includes one or more combinations in the operation time of electric automobile, circuit and fault message.
3. defining method as claimed in claim 1, it is characterised in that the history data of the electrokinetic cell of described electric automobile carrying includes: the voltage of electrokinetic cell, electric current and temperature, also includes the SOC of correspondence.
4. defining method as claimed in claim 1, it is characterised in that the History Performance Data of the electrokinetic cell of described electric automobile carrying and History Performance Data are reported by electric automobile corresponding electric automobile mark in real time.
5. defining method as claimed in claim 1, it is characterised in that other electrokinetic cells of the history data of other electrokinetic cells matched described in having are more than one;
The described history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile:
The SOC of the history data matched of other electrokinetic cells is averaged and obtains.
6. defining method as claimed in claim 1, it is characterised in that other electrokinetic cells of the history data of other electrokinetic cells matched described in having are more than one;
The described history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile:
Current operating data according to the described electrokinetic cell that SOC request is carried, after adopting the calculating of SOC formula to obtain benchmark SOC, after being weighted in the SOC of the history data matched of other electrokinetic cells, obtains SOC.
7. the determination system of the state-of-charge of an electrokinetic cell, it is characterised in that including: data base (201) and server (202), wherein,
Data base (201), identifies history data and the History Performance Data of the electrokinetic cell storing the carrying of each electric automobile for each electric automobile in map network;
Server (202), for receiving the current state-of-charge SOC request obtaining carrying electrokinetic cell that electric automobile sends, the service data that described electrokinetic cell is current is carried in described request;The History Performance Data of described electrokinetic cell data base 201 stored mates with the historic performance data of other electrokinetic cells of storage, obtains the history data of other electrokinetic cells matched; The current operating data asking the described electrokinetic cell carried according to SOC gets the history data that other electrokinetic cells match, the history data matched according to other electrokinetic cells calculates the SOC obtaining described electric automobile, is sent to described electric automobile.
8. determine system as claimed in claim 7, it is characterised in that the History Performance Data of the electrokinetic cell of described electric automobile carrying at least includes: the configuration parameter of electrokinetic cell and health data, wherein,
Described health data includes one or more combinations in the operation time of electric automobile, circuit and fault message.
9. determine system as claimed in claim 7, it is characterised in that the history data of the electrokinetic cell of described electric automobile carrying includes: the voltage of electrokinetic cell, electric current and temperature, also includes the SOC of correspondence.
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| CN107037370A (en) * | 2017-04-18 | 2017-08-11 | 知豆电动汽车有限公司 | Residual quantity calculation method of electric vehicle battery based on monitoring data |
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| CN110336336A (en) * | 2018-03-29 | 2019-10-15 | 中国科学院微电子研究所 | A kind of remaining battery capacity calculation method and device |
| CN110549902A (en) * | 2018-03-30 | 2019-12-10 | 比亚迪股份有限公司 | Cloud server, electric automobile and management system and method of power battery in electric automobile |
| CN111751729A (en) * | 2019-03-27 | 2020-10-09 | 大众汽车有限公司 | Method for determining the state of a rechargeable battery of a vehicle |
| CN113625175A (en) * | 2021-10-11 | 2021-11-09 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | SOC estimation method and system based on cloud big data platform |
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