CN109693545B - Estimation method and device for residual energy of battery and residual mileage of vehicle - Google Patents
Estimation method and device for residual energy of battery and residual mileage of vehicle Download PDFInfo
- Publication number
- CN109693545B CN109693545B CN201711003717.1A CN201711003717A CN109693545B CN 109693545 B CN109693545 B CN 109693545B CN 201711003717 A CN201711003717 A CN 201711003717A CN 109693545 B CN109693545 B CN 109693545B
- Authority
- CN
- China
- Prior art keywords
- battery
- vehicle
- energy
- state
- remaining
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005265 energy consumption Methods 0.000 claims abstract description 47
- 230000036541 health Effects 0.000 claims abstract description 21
- 230000001133 acceleration Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The invention provides a method and a device for estimating remaining energy of a battery and remaining mileage of a vehicle, wherein the method for estimating the remaining mileage of the vehicle comprises the following steps: acquiring the calibration energy, the battery state of charge value and the battery state of health value of the battery, and calculating the residual energy of the battery according to the acquired calibration energy value, the battery state of charge value and the battery state of health value of the battery; and calculating the remaining mileage of the vehicle according to the calculated remaining energy of the battery and the average energy consumption per kilometer. The battery state of health value is considered when the battery residual energy is calculated, so that the estimation of the battery residual energy is more accurate, and the calculation of the battery residual energy is also more accurate. In addition, the method can effectively reduce the change of the remaining mileage during the switching process of the acceleration and the constant-speed running of the remaining mileage, can more accurately acquire the remaining mileage of the vehicle, and is convenient for a driver to master the condition of the remaining mileage of the vehicle in real time.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a method and a device for estimating remaining energy of a battery and remaining mileage of a vehicle.
Background
The problems of energy crisis, environmental pollution, greenhouse effect and the like are increasingly serious, so that new energy automobiles become a necessary trend for the revolution of the automobile industry. The electric automobile has the advantages of high efficiency, energy conservation and zero emission at terminals, is widely concerned by scientific research institutions and enterprises, and can well remind drivers of the prediction of the remaining mileage of the electric automobile, so that the electric automobile becomes one of the key points of the research in the field of electric automobiles.
In the field of electric vehicles, many electric vehicles calculate and display the state of charge (i.e., SOC) of a battery, but the functional design is rarely used for the remaining mileage, and there is no accepted method for estimating the remaining mileage of an electric vehicle in the industry. In actual use, the driver is most concerned about the remaining mileage, if the vehicle cannot be charged on time, the vehicle cannot run midway due to no electricity, if the remaining mileage can be displayed, the driver can more reasonably select a running route and charge the vehicle in time, the probability of the occurrence of the non-running midway is reduced, the user pays attention to the nature of the remaining electricity or the remaining mileage of the vehicle, the electric vehicle needs to intuitively and accurately know the mileage which the vehicle can run, the driver can conveniently make a running plan and judge when to charge the vehicle,
the electric automobile has various different operating conditions, and the different operating conditions have great influence on the estimation of the remaining mileage of the electric automobile; acquiring energy consumption per kilometer in a real-time driving mode according to a driving mode acquired in advance and an energy consumption per kilometer table under a working condition; acquiring the state of charge (SOC) of a current battery, and calculating the remaining mileage of the vehicle according to the current battery SOC and the energy consumption per kilometer in a real-time driving mode; although the method can calculate the remaining mileage of the vehicle, the battery used for a long time also has partial electric quantity loss according to the attenuation characteristic of the battery, so that the remaining energy of the battery is calculated inaccurately if only the SOC of the battery is considered, and the remaining mileage of the vehicle is further inaccurate if the remaining energy of the battery is calculated inaccurately, so that the requirement that a driver needs to obtain the accurate remaining mileage of the vehicle in real time cannot be met.
Disclosure of Invention
The invention aims to provide a method for estimating the residual energy of a battery, which is used for solving the problem of inaccurate estimation of the residual energy of the battery; meanwhile, the method and the device for estimating the remaining mileage of the vehicle are provided, and the problem that the estimation of the remaining mileage of the vehicle in the prior art is inaccurate is solved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for estimating remaining energy of a battery, comprising the steps of:
and acquiring the calibration energy, the battery state of charge value and the battery state of health value of the battery, and calculating the residual energy of the battery according to the acquired calibration energy value, the battery state of charge value and the battery state of health value of the battery.
Further, the remaining energy of the battery is represented as:
Ebr＝Ebn*SOH*SOC
wherein E isbrFor remaining energy of the battery, EbnThe SOH is the state of health value of the battery, and the SOC is the state of charge value of the battery.
The invention also provides an estimation method of the remaining mileage of the electric automobile, which comprises the following steps:
1) acquiring the calibration energy, the battery state of charge value and the battery state of health value of the battery, and calculating the residual energy of the battery according to the acquired calibration energy value, the battery state of charge value and the battery state of health value of the battery;
2) and calculating the remaining mileage of the vehicle according to the calculated remaining energy of the battery and the average energy consumption per kilometer.
Further, the battery remaining energy is expressed as:
Ebr＝Ebn*SOH*SOC
wherein E isbrFor remaining energy of the battery, EbnThe SOH is the state of health value of the battery, and the SOC is the state of charge value of the battery.
Further, the energy consumption per kilometer of the vehicle after the air conditioner is started is also considered when the remaining mileage of the vehicle is calculated.
Further, the average energy consumption per kilometer is a weighted sum of corresponding average energy consumption per kilometer under at least two different driving miles, and the weight coefficients are added to be 1.
Further, the average energy consumption per kilometer includes average energy consumption per kilometer in a long-term driving state of the vehicleaAverage energy consumption per kilometer E for 100 kilometers of travelhAverage energy consumption per kilometer of 10 kilometers of traveltAnd an average energy consumption per kilometer E of 1 kilometer of travel0The vehicle long-term running state refers to a state in which the vehicle runs from the starting running state to the current running state.
Further, the remaining range of the vehicle is represented as:
wherein E isbrResidual energy for the battery pack; ac ofstaThe air conditioner is in an opening state, the opening is 1, and the closing is 0; eACEnergy consumption per kilometer after the air conditioner is started; eaThe average energy consumption per kilometer under the state that the vehicle runs all the time; ehAverage energy consumption per kilometer for a vehicle traveling 100 kilometers; etAverage energy consumption per kilometer for 10 kilometers of vehicle travel; e0Average energy consumption per kilometer for 1 kilometer of vehicle travel; a. b, c and d are corresponding weight values respectively.
The invention also provides a device for estimating the remaining mileage of the vehicle, which comprises a controller and a collector, wherein the collector is used for sending the calibration energy, the battery charge state value and the battery health state value of the battery pack to the controller; and calculating the remaining mileage of the vehicle according to the remaining energy of the battery pack and the average energy consumption per kilometer.
Further, the controller is a vehicle control unit, and the collector is a battery management system.
The invention has the beneficial effects that:
the method considers the state of health value of the battery when calculating the residual energy of the battery, so that the estimation of the residual energy of the battery is more accurate, and a foundation is laid for further accurately estimating the residual mileage of the vehicle.
And calculating the remaining mileage of the vehicle according to the remaining energy of the battery and the average energy consumption per kilometer, wherein the remaining energy of the battery is calculated accurately, so that the remaining mileage of the vehicle is calculated accurately. In addition, the method can effectively reduce the change of the remaining mileage during the switching process of the acceleration and the constant-speed running of the remaining mileage, can more accurately acquire the remaining mileage of the vehicle, and is convenient for a driver to master the condition of the remaining mileage of the vehicle in real time.
Drawings
FIG. 1 is a block diagram showing the construction of an apparatus for estimating remaining mileage of an electric vehicle;
FIG. 2 is a flowchart of a method for estimating remaining mileage of an electric vehicle.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings:
an estimation device for remaining mileage of an electric vehicle is shown in fig. 1 and comprises a controller and a collector, wherein the controller of the embodiment is a vehicle control unit, the collector is a battery management system, the battery management system collects calibration energy, a battery state of charge (SOC) value and a battery state of health (SOH) value of a battery (the battery is formed by connecting a plurality of battery packs in series or in parallel), and is used for sending the calibration energy, the battery state of charge value and the battery state of health value of the battery to the controller through a Controller Area Network (CAN) bus, and the controller is used for calculating the remaining energy of the battery according to the obtained calibration energy value, the battery state of charge value (SOC) and the battery state of health value (SOH) of the battery; and calculating the remaining mileage of the vehicle according to the calculated remaining energy of the battery and the average energy consumption per kilometer.
The device for estimating the remaining mileage of the electric automobile further comprises an anti-lock braking system and a motor controller, wherein the anti-lock braking system is used for acquiring the speed information to calculate the mileage of the automobile, and calculating the average energy consumption per kilometer according to the calculated mileage of the automobile, such as calculating the average energy consumption per kilometer of 1 kilometer, the average energy consumption per kilometer of 10 kilometers and the average energy consumption per kilometer of 100 kilometers; the vehicle control unit obtains a rotating speed value sent by the motor controller, and is used for calculating the vehicle speed and calculating the vehicle mileage to be used as a standby value when the anti-lock braking system is off-line.
When calculating the remaining mileage of the vehicle, the energy consumed by the battery management device and the DC/DC converter can be obtained by the BMS during the calculation of the battery state of charge and the remaining energy, and the energy consumption of the battery management device and the DC/DC converter is not considered herein, and it is most critical to calculate the remaining energy of the battery pack, the average power consumption of the air conditioning system, and the energy consumption of the recent road condition. Therefore, the method for estimating the remaining mileage of the electric vehicle, as shown in fig. 2, includes the following steps:
1) obtaining the calibrated energy value E of the battery packbnThe battery management device BMS sends some acquired parameters of the battery to the vehicle control unit VCU. Particularly, when the battery pack is used in a low-temperature environment, the capacity fade of the battery pack must be considered, and SOH will be a very critical factor. The battery remaining energy is expressed as:
Ebr＝Ebn*SOH*SOC
wherein E isbrFor remaining energy of the battery, EbnThe SOH is the state of health value of the battery, and the SOC is the state of charge value of the battery.
2) And calculating the remaining mileage of the vehicle according to the calculated remaining energy of the battery and the average energy consumption per kilometer. The energy consumption of the vehicle per kilometer after the air conditioner is started is also considered when the remaining mileage of the vehicle is calculated; the average energy consumption per kilometer is weighted summation of corresponding average energy consumption per kilometer under at least two different driving miles, and each weighting coefficient is added to be 1.
3) In this embodiment, the average energy consumption per kilometer in four states is taken as an example, and the average energy consumption per kilometer in a long-term driving state of a vehicle is respectivelyaAverage energy consumption per kilometer E for 100 kilometers of travelhAverage energy consumption per kilometer of 10 kilometers of traveltAnd an average energy consumption per kilometer E of 1 kilometer of travel0。
In summary, the remaining range of the vehicle is represented as:
wherein E isbrResidual energy for the battery pack; ac ofstaThe air conditioner is in an opening state, the opening is 1, and the closing is 0; eACEnergy consumption per kilometer after the air conditioner is started; eaThe average energy consumption per kilometer of the vehicle in a long-term running state is obtained; ehAverage energy consumption per kilometer for a vehicle traveling 100 kilometers; etAverage energy consumption per kilometer for 10 kilometers of vehicle travel;E0average energy consumption per kilometer for 1 kilometer of vehicle travel; a. b, c and d are corresponding weight values respectively. The long-term running state of the vehicle refers to a state in which the vehicle runs from the starting running state to the current running state.
4) The vehicle control unit continuously calculates the residual energy of the battery, judges the current electric quantity consumption state of the battery according to the calculated residual energy of the battery, and updates the E stored in the EEPROMa、Eh、Et、E0The remaining mileage of the vehicle is calculated.
The invention also provides a method for estimating the residual energy of the battery, which comprises the steps of obtaining the calibration energy, the state of charge value and the state of health value of the battery, and calculating the residual energy of the battery according to the obtained calibration energy value, the obtained state of charge value and the obtained state of health value of the battery. The estimation method considers the state of health value of the battery to enable the estimation of the residual energy of the battery to be more accurate, and lays a foundation for further accurately estimating the residual mileage of the vehicle.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention lies in the above basic scheme, and it is obvious to those skilled in the art that no creative effort is needed to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (1)
1. A method for estimating remaining mileage of a vehicle, comprising the steps of:
1) acquiring the calibration energy, the battery state of charge value and the battery state of health value of the battery, and calculating the residual energy of the battery according to the acquired calibration energy value, the battery state of charge value and the battery state of health value of the battery;
2) calculating the remaining mileage of the vehicle according to the calculated remaining energy of the battery and the average energy consumption per kilometer;
the remaining energy of the battery is represented as:
Ebr＝Ebn*SOH*SOC
wherein E isbrFor remaining energy of the battery, EbnThe method comprises the steps of taking the calibrated energy of a battery, taking SOH as the state of health value of the battery, and taking SOC as the state of charge value of the battery;
the remaining range of the vehicle is represented as:
wherein E isbrResidual energy for the battery pack; ac ofstaThe air conditioner is in an opening state, the opening is 1, and the closing is 0; eACEnergy consumption per kilometer after the air conditioner is started; eaAverage energy consumption per kilometer for the vehicle from a starting driving state to a current driving state; ehAverage energy consumption per kilometer for a vehicle traveling 100 kilometers; etAverage energy consumption per kilometer for 10 kilometers of vehicle travel; e0Average energy consumption per kilometer for 1 kilometer of vehicle travel; a. b, c and d are corresponding weight values respectively, and the sum of the weight values is 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003717.1A CN109693545B (en) | 2017-10-24 | 2017-10-24 | Estimation method and device for residual energy of battery and residual mileage of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003717.1A CN109693545B (en) | 2017-10-24 | 2017-10-24 | Estimation method and device for residual energy of battery and residual mileage of vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109693545A CN109693545A (en) | 2019-04-30 |
| CN109693545B true CN109693545B (en) | 2021-02-23 |
Family
ID=66227988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711003717.1A Active CN109693545B (en) | 2017-10-24 | 2017-10-24 | Estimation method and device for residual energy of battery and residual mileage of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109693545B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673040A (en) * | 2018-07-03 | 2020-01-10 | 河南森源重工有限公司 | SOC estimation method and device for power battery of electric vehicle |
| CN110435480B (en) * | 2019-07-15 | 2021-03-30 | 中国第一汽车股份有限公司 | Remaining mileage determining method and device and vehicle |
| CN110488198A (en) * | 2019-09-26 | 2019-11-22 | 广州小鹏汽车科技有限公司 | Evaluation method, device and the vehicle of battery remaining power |
| CN112858924B (en) * | 2019-11-28 | 2023-06-13 | 比亚迪股份有限公司 | Power battery remaining energy estimation method, device, vehicle and storage medium |
| CN111137169B (en) * | 2020-02-21 | 2021-07-23 | 威马智慧出行科技（上海）有限公司 | Estimation method and device of endurance mileage |
| CN112703518B (en) * | 2020-07-28 | 2022-03-29 | 华为技术有限公司 | Remaining mileage prediction method and battery remote service system |
| CN114407660A (en) * | 2022-02-10 | 2022-04-29 | 上海集嘉同速汽车科技有限公司 | Method for estimating remaining driving turns of field-operated electric vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015029398A (en) * | 2013-06-26 | 2015-02-12 | 日東電工株式会社 | Power supply device, mobile device arranged by use thereof, and battery-type electric vehicle |
| CN104842797B (en) * | 2014-05-22 | 2017-06-06 | 北汽福田汽车股份有限公司 | Electric automobile future average current drain is estimated, remaining continual mileage method of estimation and system |
| CN105365592B (en) * | 2015-10-30 | 2018-01-09 | 北京新能源汽车股份有限公司 | Remaining course continuation mileage method of estimation, system and the electric automobile of electric automobile |
| CN105807230B (en) * | 2016-03-11 | 2019-03-26 | 郑贵林 | Remaining battery capacity and health status rapid detection method and device |
| JP6500824B2 (en) * | 2016-04-05 | 2019-04-17 | トヨタ自動車株式会社 | Battery inspection device |
| CN106427579B (en) * | 2016-07-25 | 2018-10-02 | 意昂神州（北京）科技有限公司 | Pure electric automobile continual mileage evaluation method and device based on average energy consumption modeling |
-
2017
- 2017-10-24 CN CN201711003717.1A patent/CN109693545B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109693545A (en) | 2019-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109693545B (en) | Estimation method and device for residual energy of battery and residual mileage of vehicle | |
| CN110549876B (en) | Energy output control method and device and hydrogen fuel hybrid electric vehicle | |
| CN105584438B (en) | Display and algorithm of electric mileage influence factors | |
| US8406948B2 (en) | Plug-in hybrid electric vehicle and method of control for providing distance to empty and equivalent trip fuel economy information | |
| CN102539016B (en) | Onboard adaptive battery core temperature estimation | |
| CN105904981A (en) | Electric car driving mileage estimation control method and device, and vehicle control unit | |
| CN108819722A (en) | A kind of electric car course continuation mileage predictor method | |
| CN105277893A (en) | Real-time battery estimation | |
| CN107458236B (en) | A kind of predictor method, device, entire car controller and the automobile of residue continual mileage | |
| CN107458259A (en) | A kind of New-energy electric vehicle remaining mileage evaluation method | |
| US9539904B2 (en) | Energy consumption rate in distance domain | |
| CN104977544A (en) | Method and apparatus for evaluating residual available energy of battery of battery electric vehicle | |
| KR20130068242A (en) | Dte estimation method of electric vehicle | |
| CN103620907A (en) | Charge/discharge assist device | |
| CN111591141B (en) | Electric automobile remaining mileage estimation method and device and electric automobile | |
| CN112785133A (en) | Cruising ability estimation method and system based on navigation system | |
| CN107009912B (en) | A kind of adaptive approach, device and automobile that the continual mileage of vehicle calculates | |
| CN111398828B (en) | Method for estimating remaining electric quantity and remaining driving mileage of electric automobile | |
| CN109117438A (en) | Vehicles remaining mileage evaluation method and device with power supply system | |
| CN115230526A (en) | Method and device for estimating remaining endurance mileage of automobile and automobile | |
| KR20140095780A (en) | Apparatus and method for estimating a drivable distance of an electronic vehecle | |
| CN112083332A (en) | Pure electric vehicle driving range estimation method considering user experience | |
| CN114954022A (en) | Electric automobile cloud cooperative control device and method | |
| WO2022024848A1 (en) | Battery management system, calculation system, battery degradation prediction method, and battery degradation prediction program | |
| Das et al. | Eco-routing navigation systems in electric vehicles: A comprehensive survey |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method and device for estimating remaining battery energy and vehicle remaining mileage Effective date of registration: 20220808 Granted publication date: 20210223 Pledgee: Xuchang Digital Supply Chain Management Service Co., Ltd. Pledgor: HENAN SENYUAN HEAVY INDUSTRY Co.,Ltd. Registration number: Y2022980012102 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210223 Pledgee: Xuchang Digital Supply Chain Management Service Co.,Ltd. Pledgor: HENAN SENYUAN HEAVY INDUSTRY Co.,Ltd.|SENYUAN AUTOMOBILE Co.,Ltd.|Henan Senyuan Electric Vehicle Co.,Ltd. Registration number: Y2022980012102 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method and device for estimating the remaining energy of batteries and the remaining mileage of vehicles Granted publication date: 20210223 Pledgee: Xuchang Investment Property Management Group Co.,Ltd. Pledgor: HENAN SENYUAN HEAVY INDUSTRY Co.,Ltd.|SENYUAN AUTOMOBILE Co.,Ltd.|Henan Senyuan Electric Vehicle Co.,Ltd. Registration number: Y2024980004565 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |