CN109693545A - The evaluation method and device of a kind of battery remaining power, vehicle remaining mileage - Google Patents

The evaluation method and device of a kind of battery remaining power, vehicle remaining mileage Download PDF

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Publication number
CN109693545A
CN109693545A CN201711003717.1A CN201711003717A CN109693545A CN 109693545 A CN109693545 A CN 109693545A CN 201711003717 A CN201711003717 A CN 201711003717A CN 109693545 A CN109693545 A CN 109693545A
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CN
China
Prior art keywords
battery
vehicle
kilometer
energy
energy consumption
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CN201711003717.1A
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Chinese (zh)
Inventor
楚金甫
赵心
刘忠政
刘亚闯
董龙飞
李美霞
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河南森源重工有限公司
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Priority to CN201711003717.1A priority Critical patent/CN109693545A/en
Publication of CN109693545A publication Critical patent/CN109693545A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12Recording operating variables ; Monitoring of operating variables

Abstract

The present invention provides a kind of battery remaining powers, the evaluation method and device of vehicle remaining mileage, wherein, the step of evaluation method of vehicle remaining mileage are as follows: calibration energy, battery charge state value and the cell health state value for obtaining battery calculate the dump energy of battery according to calibration energy value, battery charge state value and the cell health state value of the battery of acquisition;According to the battery remaining power being calculated and the remaining mileage number of average every kilometer of energy consumption calculation vehicle.Cell health state value is considered when calculating battery remaining power, keeps the estimation of the dump energy of battery more accurate, then the dump energy of battery calculates also more accurate.Accelerating and the variation of the remaining mileage for the handoff procedure that travels at the uniform speed in addition, method of the invention can effectively reduce remaining mileage, can more accurately obtain vehicle remaining mileage, driver is facilitated to grasp the remaining mileage situation of vehicle in real time.

Description

The evaluation method and device of a kind of battery remaining power, vehicle remaining mileage

Technical field

The invention belongs to electric vehicle engineering field, in particular to a kind of battery remaining power, vehicle remaining mileage are estimated Calculate method and device.

Background technique

The problems such as energy crisis, environmental pollution and greenhouse effects, gets worse, and new-energy automobile is made to become automobile industry The inexorable trend of change.Electric car have efficiently, the advantage of energy conservation, terminal zero-emission, by the wide of scientific research institution and enterprise General concern, and estimating for the remaining mileage of electric car can be reminded well to driver, become electric car area research One of emphasis.

In electric car field, there are many electric cars to have calculating and display to the state-of-charge (i.e. SOC) of battery, but But rarely have this Functional Design, and the side that industry does not generally acknowledge the estimation of Remainder Range of Electric Vehicle still for remaining mileage Method.Actual in use, the most concerned exactly remaining mileage of driver, if cannot charge on time, automobile will midway because It can not be travelled to be out of power, if remaining mileage can be shown, driver can more reasonably select travel route, timely give Automobile charging reduces the probability for occurring not travelling halfway, and user is to its essence of the concern of remaining capacity or to automobile residue The concern of mileage, electric car needs are intuitive, accurately know the mileage number that car can also travel, and driver is facilitated to make traveling It plans and determines when to charge to vehicle,

There are many different operating conditions, different operating conditions to have estimated very to the remaining mileage of electric car for electric car Big influence, in the prior art, the calculation method to remaining mileage are to detect and identify the real-time driving mode of electric car; According to every kilometer of energy consumption table under the driving mode and operating condition being obtained ahead of time, every kilometer of energy consumption under real-time driving mode is obtained;It obtains The state-of-charge (SOC) for taking present battery, according to every kilometer of energy consumption calculation vehicle under present battery SOC and real-time driving mode Remaining mileage;Although this method can calculate vehicle remaining mileage, according to the attenuation characteristic of battery, by making for a long time Battery also has part electric quantity loss, and therefore, if only considering, the SOC of battery calculates the dump energy of battery, will lead to electricity The dump energy in pond calculates inaccuracy, if the dump energy of battery calculates the inaccurate remaining mileage that will further result in vehicle and deposits In the defect of inaccuracy, the requirement of the accurate remaining mileage of vehicle need to be obtained in real time by not being able to satisfy driver.

Summary of the invention

The purpose of the present invention is to provide a kind of evaluation methods of battery remaining power, estimate for solving battery remaining power True problem is not calculated accurately;The evaluation method and device of a kind of vehicle remaining mileage are additionally provided simultaneously, for solving the prior art The problem of the estimation inaccuracy of middle vehicle remaining mileage.

To achieve the above object, the technical scheme is that

A kind of evaluation method of battery remaining power, includes the following steps:

Calibration energy, battery charge state value and the cell health state value for obtaining battery, according to the mark of the battery of acquisition Surely magnitude, battery charge state value and cell health state value calculate the dump energy of battery.

Further, the expression of the battery remaining power are as follows:

Ebr=Ebn*SOH*SOC

Wherein, EbrFor battery remaining power, EbnFor the calibration energy of battery pack, SOH is the health status value of battery, SOC For the state of charge of battery.

The present invention also provides a kind of evaluation methods of Remainder Range of Electric Vehicle, include the following steps:

1) calibration energy, battery charge state value and the cell health state value for obtaining battery, according to the battery of acquisition Demarcate the dump energy that energy value, battery charge state value and cell health state value calculate battery;

2) according to the battery remaining power being calculated and the remaining mileage number of average every kilometer of energy consumption calculation vehicle.

Further, the battery remaining power indicates are as follows:

Ebr=Ebn*SOH*SOC

Wherein, EbrFor battery remaining power, EbnFor the calibration energy of battery, SOH is the health status value of battery, and SOC is The state of charge of battery.

Further, every kilometer of energy consumption of vehicle after air-conditioning is opened is also contemplated when calculating the remaining mileage of vehicle.

Further, average every kilometer of energy consumption is corresponding average every kilometer of energy under at least two different mileages travelled The weighted sum of consumption, each weight coefficient add up to 1.

Further, average every kilometer of energy consumption includes average every kilometer of energy consumption E under vehicle long run statea、 Average every kilometer of energy consumption E of 100 kilometers of travelingh, 10 kilometers of traveling average every kilometer of energy consumption EtAnd 1 kilometer of traveling is average every Kilometer energy consumption E0, wherein vehicle long run state refers to vehicle from the state that starts running until current running state.

Further, the vehicle remaining mileage indicates are as follows:

Wherein, EbrFor battery pack dump energy;AcstaFor air-conditioning open state, opening is 1, and closing is 0;EACFor air-conditioning Every kilometer of energy consumption after unlatching;EaFor average every kilometer of energy consumption under vehicle always driving status;EhIt is 100 kilometers of vehicle driving Average every kilometer of energy consumption;EtFor 10 kilometers of vehicle driving of average every kilometer of energy consumption;E0For 1 kilometer of vehicle driving of average every public affairs In energy consumption;A, b, c, d are respectively corresponding weighted value.

The present invention also provides a kind of estimation device of vehicle remaining mileage, including controller and collector, the acquisitions Device is used to the calibration energy of battery pack, battery charge state value and cell health state value being sent to the controller, described Calibration energy value, battery charge state value and the cell health state value that controller is used for the battery pack according to acquisition calculate battery The dump energy of group;And according to battery pack dump energy and the remaining mileage number of average every kilometer of energy consumption calculation vehicle.

Further, the controller is entire car controller, and the collector is battery management system.

The beneficial effects of the present invention are:

The present invention considers cell health state value when calculating battery remaining power, makes the estimation of the dump energy of battery More accurate, the remaining mileage for further accurate estimation vehicle is laid a good foundation.

According to the dump energy of battery and the remaining mileage number of average every kilometer of energy consumption calculation vehicle, due to remaining for battery Complementary energy calculates more accurate, calculates the remaining mileage of vehicle also more accurate.In addition, method of the invention can have The reduction remaining mileage of effect is accelerating and the variation of the remaining mileage for the handoff procedure that travels at the uniform speed, and can more accurately obtain vehicle Remaining mileage, facilitates driver to grasp the remaining mileage situation of vehicle in real time.

Detailed description of the invention

Fig. 1 is the structural block diagram of the estimation device of Remainder Range of Electric Vehicle;

Fig. 2 is the flow chart of the evaluation method of Remainder Range of Electric Vehicle.

Specific embodiment

A specific embodiment of the invention is further described with reference to the accompanying drawing:

A kind of estimation device of Remainder Range of Electric Vehicle, as shown in Figure 1, including controller and collector, the present embodiment Controller be entire car controller, collector is battery management system, and battery management system acquires battery, and (battery is by several What a battery pack was connected in series or in parallel) calibration energy, battery charge state value SOC and cell health state value SOH, be used in combination In the calibration energy of battery, battery charge state value and cell health state value are sent to controller by CAN bus, control The calibration energy value, battery charge state value SOC and cell health state value SOH that device is used for the battery according to acquisition calculate battery Dump energy;And according to the dump energy for the battery being calculated and the remaining mileage of average every kilometer of energy consumption calculation vehicle.

The estimation device of Remainder Range of Electric Vehicle further includes anti-blocking brake system and electric machine controller, the anti-braking Dead system calculates vehicle mileage for acquiring vehicle speed information, and vehicle mileage obtained by calculation calculates average every kilometer of energy Consumption such as calculates 1 kilometer of average every kilometer of energy consumption, 10 kilometers of average every kilometer of energy consumption and 100 kilometers of average every kilometer of energy Consumption;Entire car controller obtains the tachometer value that electric machine controller is sent, and for calculating speed when anti-blocking brake system is offline And it calculates vehicle mileage and is used as backed-up value.

When calculating vehicle remaining mileage, the energy of the consumption of cell managing device and DC/DC converter can be by BMS in electricity It is obtained in the calculating process of pond state-of-charge and dump energy, here, the energy consumption on this two sides is not just considered, it is the most key It is the dump energy for calculating battery pack, the average power consumption and nearest road conditions Energy Expenditure Levels of air-conditioning system.Therefore, electronic vapour The evaluation method of vehicle remaining mileage, as shown in Figure 2, comprising the following steps:

1) the energy value E of battery pack calibration is obtainedbn, battery charge state SOC and cell health state SOH, battery management The some parameters for the above-mentioned battery that device BMS will acquire are sent to entire car controller VCU.Especially use at low ambient temperatures When, it is necessary to consider the capacity attenuation situation of battery pack, SOH will be a very crucial factor.Battery remaining power indicates are as follows:

Ebr=Ebn*SOH*SOC

Wherein, EbrFor battery pack dump energy, EbnFor the calibration energy of battery pack, SOH is the health status value of battery, SOC is the state of charge of battery.

2) according to the battery remaining power being calculated and the remaining mileage number of average every kilometer of energy consumption calculation vehicle.It is counting Every kilometer of energy consumption of vehicle after air-conditioning is opened is also contemplated when calculating the remaining mileage of vehicle;Average every kilometer of energy consumption is extremely herein The weighted sum of corresponding average every kilometer of energy consumption, each weight coefficient add up to 1 under few two kinds of different mileages travelled.

3) the present embodiment is by taking average every kilometer of energy consumption under four kinds of states as an example, respectively under vehicle long run state Average every kilometer of energy consumption Ea, 100 kilometers of traveling average every kilometer of energy consumption Eh, 10 kilometers of traveling average every kilometer of energy consumption EtAnd Average every kilometer of energy consumption E of 1 kilometer of traveling0

To sum up, the remaining mileage of vehicle indicates are as follows:

Wherein, EbrFor battery pack dump energy;AcstaFor air-conditioning open state, opening is 1, and closing is 0;EACFor air-conditioning Every kilometer of energy consumption after unlatching;EaFor average every kilometer of energy consumption under vehicle long run state;EhIt is 100 kilometers of vehicle driving Average every kilometer of energy consumption;EtFor 10 kilometers of vehicle driving of average every kilometer of energy consumption;E0For 1 kilometer of vehicle driving of average every public affairs In energy consumption;A, b, c, d are respectively corresponding weighted value.Wherein, vehicle long run state refers to vehicle from starting running shape State is until current running state.

4) entire car controller constantly calculates the dump energy of battery, according to the battery remaining power being calculated, judgement The current electric quantity consumption state of battery, updates storage the E in EEPROMa、Eh、Et、E0Value, calculate the remaining mileage of vehicle.

The present invention also provides a kind of evaluation methods of battery remaining power, obtain calibration energy, the battery charge of battery State value and cell health state value, according to the calibration energy value of the battery of acquisition, battery charge state value and battery health shape The dump energy of state value calculating battery.The evaluation method, which considers cell health state value, makes the estimation of battery remaining power more Accurately, the remaining mileage for further accurate estimation vehicle is laid a good foundation.

Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention Under to embodiment carry out change, modification, replacement and modification still fall in protection scope of the present invention.

Claims (10)

1. a kind of evaluation method of battery remaining power, which comprises the steps of:
Calibration energy, battery charge state value and the cell health state value for obtaining battery, according to the calibration energy of the battery of acquisition Magnitude, battery charge state value and cell health state value calculate the dump energy of battery.
2. the evaluation method of battery remaining power according to claim 1, which is characterized in that the battery remaining power table It is shown as:
Ebr=Ebn*SOH*SOC
Wherein, EbrFor battery remaining power, EbnFor the calibration energy of battery pack, SOH is the health status value of battery, and SOC is electricity The state of charge in pond.
3. a kind of evaluation method of vehicle remaining mileage, which comprises the steps of:
1) calibration energy, battery charge state value and the cell health state value for obtaining battery, according to the calibration of the battery of acquisition Energy value, battery charge state value and cell health state value calculate the dump energy of battery;
2) according to the battery remaining power being calculated and the remaining mileage number of average every kilometer of energy consumption calculation vehicle.
4. the evaluation method of vehicle remaining mileage according to claim 3, which is characterized in that the battery remaining power It indicates are as follows:
Ebr=Ebn*SOH*SOC
Wherein, EbrFor battery remaining power, EbnFor the calibration energy of battery, SOH is the health status value of battery, and SOC is battery State of charge.
5. the evaluation method of vehicle remaining mileage according to claim 3, which is characterized in that in the residue for calculating vehicle Every kilometer of energy consumption of vehicle after air-conditioning is opened is also contemplated when journey.
6. the evaluation method of vehicle remaining mileage according to claim 5, which is characterized in that average every kilometer of energy consumption For the weighted sum of corresponding average every kilometer of energy consumption under at least two different mileages travelled, each weight coefficient adds up to 1.
7. the evaluation method of vehicle remaining mileage according to claim 6, which is characterized in that average every kilometer of energy consumption Including average every kilometer of energy consumption E under vehicle long run statea, 100 kilometers of traveling average every kilometer of energy consumption Eh, traveling 10 Average every kilometer of energy consumption E of kilometertAnd average every kilometer of energy consumption E of 1 kilometer of traveling0, wherein vehicle long run state refers to It is vehicle from the state that starts running until current running state.
8. the evaluation method of vehicle remaining mileage according to claim 7, which is characterized in that the vehicle remaining mileage table It is shown as:
Wherein, EbrFor battery pack dump energy;AcstaFor air-conditioning open state, opening is 1, and closing is 0;EACAfter being opened for air-conditioning Every kilometer of energy consumption;EaFor average every kilometer of energy consumption under vehicle always driving status;EhIt is every for 100 kilometers of vehicle driving be averaged Kilometer energy consumption;EtFor 10 kilometers of vehicle driving of average every kilometer of energy consumption;E0For 1 kilometer of vehicle driving of average every kilometer of energy consumption; A, b, c, d are respectively corresponding weighted value.
9. a kind of estimation device of vehicle remaining mileage, which is characterized in that including controller and collector, the collector is used for The calibration energy of battery pack, battery charge state value and cell health state value are sent to the controller, the controller Calibration energy value, battery charge state value and cell health state value for the battery pack according to acquisition calculate the surplus of battery pack Complementary energy;And according to battery pack dump energy and the remaining mileage number of average every kilometer of energy consumption calculation vehicle.
10. the estimation device of vehicle remaining mileage according to claim 9, which is characterized in that the controller is vehicle Controller, the collector are battery management system.
CN201711003717.1A 2017-10-24 2017-10-24 The evaluation method and device of a kind of battery remaining power, vehicle remaining mileage CN109693545A (en)

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