CN105677901B - Method and system for determining state of charge of power battery - Google Patents
Method and system for determining state of charge of power battery Download PDFInfo
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Abstract
本发明公开了一种动力电池的荷电状态的确定方法及系统，在网络侧设置数据库，对应每辆电动汽车标识存储每辆电动汽车承载的动力电池的历史运行数据及历史性能数据，当网络侧的服务器接收电动汽车发送的获取承载动力电池的当前SOC请求时，所述请求携带所述动力电池当前的运行数据，网络侧的服务器将存储的所述动力电池的历史性能数据与存储的其他动力电池的历史性性能数据进行匹配，获取相匹配的其他动力电池的历史运行数据，根据SOC请求携带的所述动力电池的当前运行数据获取到其中相匹配的历史运行数据，根据其他动力电池的相匹配的历史运行数据计算得到所述电动汽车的SOC，发送给所述电动汽车。本发明准确确定动力电池的SOC。
The invention discloses a method and system for determining the state of charge of a power battery. A database is set on the network side, and the historical operation data and historical performance data of the power battery carried by each electric vehicle are stored corresponding to the identification of each electric vehicle. When the server on the network side receives the request sent by the electric vehicle to obtain the current SOC of the carrying power battery, the request carries the current operating data of the power battery, and the server on the network side compares the stored historical performance data of the power battery with other stored data. The historical performance data of the power battery is matched to obtain the matching historical operating data of other power batteries, and the matching historical operating data is obtained according to the current operating data of the power battery carried in the SOC request. The SOC of the electric vehicle is obtained by calculating the matched historical operating data, and sent to the electric vehicle. The present invention accurately determines the SOC of the power battery.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a method and a system for determining the state of charge of a power battery.
Background
New energy vehicles, especially electric vehicles, are the development trend of tools for going out in the future. The power battery is a constituent unit of a new energy automobile power system, and the State of Charge (SOC) of the power battery is timely known to directly influence the Charge and discharge performance of the power battery, so that the overall performance and safety of the electric automobile are influenced.
At present, the method for acquiring the SOC of the loaded power battery by the electric vehicle is as follows: the Battery Management System (BMS) of the electric vehicle is provided with a SOC calculation formula, and parameters related to the SOC formula include voltage, current and temperature of the power Battery, so the BMS of the electric vehicle acquires the voltage, current and temperature of the power Battery, substitutes the acquired voltage, current and temperature of the power Battery into the set SOC formula, and calculates the current SOC of the power Battery.
However, since the SOC of the power battery is not only limited by the current operation data including the current voltage, current and temperature of the power battery, but also limited by the current performance data including the current charge-discharge performance and the current loss performance of the power battery, if the SOC of the power battery is calculated according to the set SOC formula based on the current operation data of the power battery, the calculated SOC of the power battery is not accurate enough. Further, based on the inaccurate SOC of the power battery, the BMS of the electric vehicle may damage the power battery by performing a subsequent charging and discharging process of the power battery, so that the life value of the power battery is reduced, and the overall performance and safety of the electric vehicle are affected.
Disclosure of Invention
The invention aims to provide a method for determining the state of charge of a power battery, which can accurately determine the SOC of the power battery.
The invention also provides a system for determining the state of charge of the power battery, and the system can accurately determine the SOC of the power battery.
Specifically, the method comprises the following steps:
a method for determining the state of charge of a power battery is applied to a vehicle networking consisting of an electric vehicle and a server, and comprises the following steps:
storing historical operation data and historical performance data of a power battery loaded by each electric automobile in a corresponding network by each electric automobile identifier into a set database;
the method comprises the steps that a server receives a request for acquiring the SOC of a current power battery bearing the power battery, which is sent by an electric automobile, wherein the request carries current operation data of the power battery;
the server matches the stored historical performance data of the power battery with the stored historical performance data of other power batteries to obtain the historical operation data of the other matched power batteries;
the server acquires historical operating data matched with other power batteries according to the current operating data of the power batteries carried by the SOC request, calculates the SOC of the electric automobile according to the historical operating data matched with other power batteries, and sends the SOC to the electric automobile.
Preferably, the historical performance data of the power battery carried by the electric automobile at least comprises the following data: configuration parameters and operating condition data of the power battery, wherein,
the operation condition data comprises one or more combinations of operation time, line and fault information of the electric automobile.
Preferably, the historical operating data of the power battery carried by the electric automobile comprises: the voltage, the current and the temperature of the power battery also comprise corresponding SOC.
Preferably, the historical performance data and the historical performance data of the power battery carried by the electric vehicle are reported by the electric vehicle in real time corresponding to the electric vehicle identifier.
Preferably, more than one other power battery with the matched historical operation data of other power batteries is provided;
the SOC of the electric automobile is obtained by calculation according to the matched historical running data of other power batteries:
and averaging the SOC values of the matched historical operation data of other power batteries.
Preferably, more than one other power battery with the matched historical operation data of other power batteries is provided;
the SOC of the electric automobile is obtained by calculation according to the matched historical running data of other power batteries:
and according to the current running data of the power battery carried by the SOC request, calculating by adopting an SOC formula to obtain a reference SOC, and weighting in the SOC of the historical running data matched with other power batteries to obtain the SOC.
A system for determining a state of charge of a power cell, comprising: a database (201) and a server (202), wherein,
the database (201) is used for storing historical operation data and historical performance data of a power battery carried by each electric automobile corresponding to each electric automobile identifier in the network;
the system comprises a server (202) and a control unit, wherein the server is used for receiving a request for acquiring the current state of charge (SOC) of a power battery sent by an electric vehicle, and the request carries the current operation data of the power battery; matching the historical performance data of the power battery stored in the database 201 with the historical performance data of other stored power batteries to obtain the historical operation data of other matched power batteries; obtaining historical operating data matched with other power batteries according to the current operating data of the power batteries carried by the SOC request, calculating the SOC of the electric automobile according to the historical operating data matched with other power batteries, and sending the SOC to the electric automobile.
Preferably, the historical performance data of the power battery carried by the electric automobile at least comprises the following data: configuration parameters and operating condition data of the power battery, wherein,
the operation condition data comprises one or more combinations of operation time, line and fault information of the electric automobile.
Preferably, the historical operating data of the power battery carried by the electric automobile comprises: the voltage, the current and the temperature of the power battery also comprise corresponding SOC.
According to the embodiments, the method for determining the SOC of the power battery provided by the present invention includes setting a database on a network side, storing historical operation data and historical performance data of the power battery loaded by each electric vehicle corresponding to each electric vehicle identifier, when a server on the network side receives a request for obtaining the current SOC of the loaded power battery sent by the electric vehicle, where the request carries current operation data of the power battery, 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 obtain historical operation data of the other matched power batteries, obtaining the historical operation data matched with the current operation data of the power battery according to the current operation data of the power battery carried by the SOC request, and calculating the SOC of the electric vehicle according to the historical operation data matched with the other power batteries, and sending the data to the electric automobile. According to the method and the device, when the SOC of the power battery of the electric automobile is determined, the SOC of the power battery is accurately determined not only based on the current voltage, current and temperature of the power battery borne by the electric automobile, but also based on the current charge-discharge performance and current loss performance of the power battery, so that the power battery is not damaged when the BMS of the electric automobile carries out the subsequent charge-discharge process of the power battery according to the calibrated SOC, the service life value of the power battery is improved, and the overall performance and safety of the electric automobile are improved.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
FIG. 1 is a flow diagram of a method for determining a state of charge of a power cell in one embodiment;
fig. 2 is a schematic diagram of a system for determining a state of charge of a power battery according to an embodiment.
Description of the reference symbols
201 database
202 server
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
For the sake of simplicity, the drawings are only schematic representations of the parts relevant to the invention, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.
As can be seen from the background, the cause of inaccuracy in calculating the current SOC of a power battery carried by an electric vehicle is mainly due to the fact that it is based only on the current operating data of the power battery, without taking into account the current performance data that also affects the SOC of the power battery. Therefore, in one embodiment, a network of electric vehicles is constructed, a database is set by the network side, and historical operation data and historical performance data of a power battery carried by each electric vehicle are stored corresponding to each electric vehicle identifier. When the current SOC of the power battery borne by the electric automobile is calculated, the current SOC is calculated by the server on the network side according to the historical operation data of the power battery borne by the electric automobile and the acquired current operation data, and factors influencing the SOC of the power battery are fully considered, so that the calculated SOC of the power battery is accurate.
Fig. 1 is a flowchart of a method for determining a state of charge of a power battery according to an embodiment, which includes the following specific steps:
102, a server on a network side receives a current SOC request for obtaining a load-bearing power battery, which is sent by an electric automobile, wherein the request carries current operation data of the power battery;
and 104, the server on the network side acquires historical operating data matched with other power batteries according to the current operating data of the power batteries carried by the SOC request, calculates the SOC of the electric automobile according to the historical operating data matched with other power batteries, and sends the SOC to the electric automobile.
In one embodiment, the network is a vehicle networking network, and is composed of a plurality of electric vehicles and a network-side server, and data are interacted among the electric vehicles and the network-side server through the network. The database provided on the network side may be integrated with the server on the network side as one entity.
In one embodiment, the historical performance data of the power battery carried by the electric vehicle includes at least: the configuration parameters and the operation condition data of the power battery, wherein the operation condition data can comprise the operation time, the circuit, the fault information and the like of the electric automobile, the operation time, the circuit, the fault information and the like are reported to the network side by the electric automobile corresponding to the electric automobile identifier in real time, and the operation time, the circuit, the fault information and the like are stored in the historical performance data corresponding to the electric automobile identifier by the network side.
In one embodiment, the historical operating data of the power battery carried by the electric vehicle includes: the voltage, the current and the temperature of the power battery further comprise corresponding SOC, wherein the corresponding SOC is obtained by adopting the method of FIG. 1. The electric automobiles are reported to the network side by corresponding electric automobile identifiers in real time, and the historical operation data corresponding to the electric automobile identifiers are stored by the network side.
In one embodiment, the number of the other power batteries obtained in step 103 may be more than one, and when there are a plurality of other power batteries, the process of calculating the SOC of the electric vehicle according to the matched historical operating data of the other power batteries in step 104 is as follows:
obtaining the average value of the SOC of the matched historical operation data of other power batteries;
or according to the current running data of the power battery carried by the SOC request, after the reference SOC is obtained by adopting an SOC formula, weighting is carried out in the SOC of the historical running data matched with other power batteries to obtain the SOC, wherein the weighting coefficient is preset in the server and is set according to technical experience.
When the current SOC of the power battery carried by a certain electric automobile is calculated, the SOC is determined based on the SOC of other power batteries with the same operation data and performance data, so that the current operation data and the performance data of the power batteries are considered during calculation, and the performance data are obtained from other electric automobiles, so that the calculation is more accurate.
Fig. 2 is a schematic structural diagram of a system for determining a state of charge of a power battery in an embodiment, and the system comprises: a database 201 and a server 202, wherein,
the database 201 is used for storing historical operation data and historical performance data of a power battery carried by each electric vehicle corresponding to each electric vehicle identifier in the network;
the server 202 is used for receiving a current SOC request for obtaining a load-bearing power battery sent by an electric vehicle, wherein the request carries current operation data of the power battery; matching the historical performance data of the power battery stored in the database 201 with the historical performance data of other stored power batteries to obtain the historical operation data of other matched power batteries; obtaining historical operating data matched with other power batteries according to the current operating data of the power batteries carried by the SOC request, calculating the SOC of the electric automobile according to the historical operating data matched with other power batteries, and sending the SOC to the electric automobile.
In one embodiment, the historical performance data of the power battery carried by the electric vehicle includes at least: the configuration parameters and the operation condition data of the power battery, wherein the operation condition data can comprise the operation time, the circuit, the fault information and the like of the electric automobile, the operation time, the circuit, the fault information and the like are reported to the network side by the electric automobile corresponding to the electric automobile identifier in real time, and the operation time, the circuit, the fault information and the like are stored in the historical performance data corresponding to the electric automobile identifier by the network side.
In one embodiment, the historical performance data of the power battery carried by the electric vehicle includes at least: the configuration parameters and the operation condition data of the power battery, wherein the operation condition data can comprise the operation time, the circuit, the fault information and the like of the electric automobile, the operation time, the circuit, the fault information and the like are reported to the network side by the electric automobile corresponding to the electric automobile identifier in real time, and the operation time, the circuit, the fault information and the like are stored in the historical performance data corresponding to the electric automobile identifier by the network side.
Because the embodiment not only is based on the current voltage, current and temperature of the power battery borne by the electric vehicle when determining the SOC of the power battery of the electric vehicle, but also is based on the current charging and discharging performance of the power battery and the current loss performance of the power battery (obtained by referring to historical performance data of other electric vehicles with the same historical performance data), the SOC of the power battery is accurately determined, and therefore when the BMS of the electric vehicle implements the subsequent charging and discharging processes of the power battery according to the calibrated SOC, the power battery is not damaged, the service life value of the power battery is improved, and the overall performance and safety of the electric vehicle are improved.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention and is not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of the features without departing from the technical spirit of the present invention are included in the scope of the present invention.
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| CN106249156A (en) * | 2016-07-28 | 2016-12-21 | 北京新能源汽车股份有限公司 | Power battery system calibration method and device, vehicle-mounted terminal and server |
| CN107037370B (en) * | 2017-04-18 | 2020-08-21 | 知豆电动汽车有限公司 | Electric vehicle remaining power calculation method based on monitoring data |
| CN107215228B (en) * | 2017-06-14 | 2019-11-15 | 上海蔚来汽车有限公司 | Power-on optimization method and device, terminal, facility, equipment, storage medium |
| CN110336336A (en) * | 2018-03-29 | 2019-10-15 | 中国科学院微电子研究所 | Method and device for calculating remaining battery power |
| 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 |
| DE102019107935A1 (en) * | 2019-03-27 | 2020-10-01 | Volkswagen Aktiengesellschaft | Method for determining the condition of a rechargeable battery in a vehicle |
| CN113625175B (en) * | 2021-10-11 | 2022-03-25 | 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 |
| CN119170956A (en) * | 2024-11-22 | 2024-12-20 | 临工重机股份有限公司 | A control method, device and mine car for thermal management system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385660A (en) * | 2010-09-03 | 2012-03-21 | 湘潭大学 | Evaluation method for system on chip (SOC) of charging station battery |
| CN104578416A (en) * | 2014-12-30 | 2015-04-29 | 深圳市科陆电子科技股份有限公司 | Energy storage monitoring system |
| CN105235543A (en) * | 2015-10-27 | 2016-01-13 | 北京新能源汽车股份有限公司 | Method, device and system for processing remaining driving mileage of electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385660A (en) * | 2010-09-03 | 2012-03-21 | 湘潭大学 | Evaluation method for system on chip (SOC) of charging station battery |
| CN104578416A (en) * | 2014-12-30 | 2015-04-29 | 深圳市科陆电子科技股份有限公司 | Energy storage monitoring system |
| CN105235543A (en) * | 2015-10-27 | 2016-01-13 | 北京新能源汽车股份有限公司 | Method, device and system for processing remaining driving mileage of electric automobile |
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