CN105044619A - Power-type power cell evaluation system used for hybrid electric vehicle and evaluation method - Google Patents

Abstract

The invention relates to an evaluation system and an evaluation method of a power type power battery for a hybrid electric vehicle, belonging to the field of battery evaluation systems. There is a lack of basis for the evaluation system and evaluation methods of power type power batteries for hybrid electric vehicles. A power-type power battery evaluation system for hybrid electric vehicles, the power-type power battery evaluation system for hybrid electric vehicles specifically includes: a power-type power battery capability evaluation control module for hybrid vehicles and a power-type power battery capability judgment database for hybrid vehicles . A power-type power battery evaluation method for hybrid electric vehicles, testing the battery capacity parameters of power-type power batteries for hybrid electric vehicles at room temperature; transmitting the measured battery capacity test data to power-type power battery capacity evaluation for hybrid electric vehicles Control module; the power type power battery capability evaluation control module for hybrid electric vehicles calls the evaluation subroutine module to perform capability evaluation.

Description

Evaluation system and evaluation method of power type power battery for hybrid electric vehicles

technical field

The invention relates to an evaluation system and evaluation method of a power type power battery for a hybrid electric vehicle.

Background technique

Power-type power batteries for hybrid vehicles usually use power-type power batteries to start the motor and power battery system when starting, climbing and accelerating. The power-type power battery of a hybrid electric vehicle plays the role of short-term power output to ensure the power of the vehicle. At present, in the field of hybrid electric vehicles, there is no evaluation basis for the performance test of hybrid electric vehicles, and the corresponding evaluation systems and methods for power-type power batteries for automobiles are still blank.

The battery is used directly, and it is impossible to know whether the existing energy-type power battery meets the needs of pure electric vehicles. Accidents are prone to occur during driving, and the battery cannot be fully utilized.

Contents of the invention

The purpose of the present invention is to propose a power type power battery evaluation system and evaluation method for hybrid vehicles in order to solve the problem that the existing power type power battery evaluation system and evaluation method for hybrid vehicles lack basis.

A power-type power battery evaluation system for hybrid electric vehicles, the power-type power battery evaluation system for hybrid electric vehicles specifically includes:

A power-type power battery capability evaluation control module for hybrid electric vehicles used for database calls;

A power-type power battery capacity determination database for hybrid electric vehicles used for battery capacity evaluation; wherein, the power-type power battery capacity determination database for hybrid electric vehicles also includes:

A charging capacity evaluation subroutine module for evaluating the charging capacity of power-type power batteries used in hybrid electric vehicles,

A discharge capacity evaluation subroutine module for evaluating the discharge capacity of power-type power batteries used in hybrid electric vehicles,

A subroutine module for evaluating the 100-kilometer acceleration capability of a complete vehicle for power-type power batteries used in hybrid vehicles,

A subroutine module for evaluating the vehicle start-up capability of a power-type power battery used in hybrid electric vehicles,

A braking energy recovery capability evaluation subroutine module for evaluating the braking energy recovery capability of power-type power batteries used in hybrid electric vehicles,

The energy efficiency capability evaluation subroutine module for evaluating the energy efficiency capability of the power type power battery used in hybrid electric vehicles,

The Coulombic efficiency capability evaluation subroutine module for evaluating the Coulombic efficiency capability of the power type power battery used in hybrid electric vehicles.

The evaluation method of the power type power battery for hybrid electric vehicles, step 1, under the condition that the ambient temperature is 0 ℃ ~ 40 ℃, use the power battery performance test device to measure the voltage, current, charging capacity, Discharge capacity, vehicle acceleration capacity of 100 km, vehicle starting capacity, braking energy recovery capacity, energy efficiency, Coulomb efficiency capacity, temperature and time parameters are tested;

Step 2. The power battery performance test device for hybrid electric vehicles passes through the CAN bus, and the charging capacity, discharging capacity, acceleration capacity of the whole vehicle to 100 kilometers, starting capacity of the whole vehicle, braking energy recovery capacity, energy efficiency, Coulomb The test data of efficiency capability is sent to the power type power battery capability evaluation control module for hybrid electric vehicles;

Step 3. The power type power battery capability evaluation control module for hybrid electric vehicles respectively calls the charging capacity evaluation subroutine module, the discharge capacity evaluation subroutine module, and the vehicle's 100-kilometer acceleration capability in the power type power battery capacity determination database for hybrid electric vehicles. The evaluation subroutine module, the vehicle startability evaluation subroutine module, the braking energy recovery ability evaluation subroutine module, the energy efficiency evaluation subroutine module, and the Coulomb efficiency ability evaluation subroutine module respectively obtain the evaluation criteria of seven test test data;

Step 4. Use each subroutine module called in step 3 to test the charging capacity, discharging capacity, acceleration capacity of the vehicle to 100 kilometers, starting capacity of the vehicle, braking energy recovery capacity, energy efficiency, and coulombic efficiency capacity obtained in step 1. These seven test test data are correspondingly evaluated for capability, and seven capability evaluation conclusions for power-type power batteries for hybrid electric vehicles are obtained.

The beneficial effects of the present invention are:

Hybrid vehicles usually use power-type power batteries to start the motor and power battery system when starting, climbing and accelerating. The power-type power battery of a hybrid electric vehicle plays the role of short-term power output to ensure the power of the vehicle.

The present invention is that this patent develops a power-type power battery evaluation system for hybrid electric vehicles, which meets the evaluation requirements of hybrid electric vehicles, and is used for its charging ability, discharging ability, acceleration ability of the whole vehicle to 100 kilometers, starting ability of the whole vehicle, and braking recovery. Performance, energy efficiency, and Coulombic efficiency were evaluated.

Description of drawings

Fig. 1 is a flowchart of the present invention;

Detailed ways

Specific implementation mode one:

The power-type power battery evaluation system for hybrid electric vehicles in this embodiment, the power-type power battery evaluation system for hybrid electric vehicles specifically includes:

The power-type power battery capability evaluation control module for hybrid electric vehicles used for database calls, connected to the power battery performance test device for hybrid electric vehicles through the CAN bus;

A power-type power battery capacity judgment database for hybrid electric vehicles used for battery capacity evaluation; a power-type power battery capacity evaluation control module for hybrid electric vehicles used for database calling;

A power-type power battery capacity determination database for hybrid electric vehicles used for battery capacity evaluation; wherein, the power-type power battery capacity determination database for hybrid electric vehicles also includes:

A charging capacity evaluation subroutine module for evaluating the charging capacity of power-type power batteries used in hybrid electric vehicles,

A discharge capacity evaluation subroutine module for evaluating the discharge capacity of power-type power batteries used in hybrid electric vehicles,

A subroutine module for evaluating the 100-kilometer acceleration capability of a complete vehicle for power-type power batteries used in hybrid vehicles,

A subroutine module for evaluating the vehicle start-up capability of a power-type power battery used in hybrid electric vehicles,

A braking energy recovery capability evaluation subroutine module for evaluating the braking energy recovery capability of power-type power batteries used in hybrid electric vehicles,

The energy efficiency capability evaluation subroutine module for evaluating the energy efficiency capability of the power type power battery used in hybrid electric vehicles,

The Coulombic efficiency capability evaluation subroutine module for evaluating the Coulombic efficiency capability of the power type power battery used in hybrid electric vehicles.

And cooperate with the energy-type power battery for pure electric vehicles in cold regions, and the temperature setting of the low temperature box for 13 hours.

Specific implementation mode two:

The evaluation method utilizing the above-mentioned power-type power battery evaluation system for hybrid electric vehicles in this embodiment,

Step 1. Under the condition that the ambient temperature is 0°C to 40°C, use the power battery performance testing device to test the voltage, current, charging capacity, discharging capacity, acceleration capacity of the whole vehicle to 100 kilometers, and the overall Car starting ability, braking energy recovery ability, energy efficiency, coulombic efficiency ability, temperature and time parameters are tested; among them, energy efficiency refers to the battery discharge power and charging time under constant current conditions, within the same charging and discharging time. The percentage of electricity becomes the energy efficiency of the storage battery; among them, the energy-type power battery performance test device for pure electric vehicles uses the power battery test device produced by Arbin Company of the United States, the model is EVTS400;

1. Charging ability test:

First, charge the power battery at a rate of 1C at 0°C to 40°C, from SOC (remaining power) to 0 to the charging capacity (Ah) corresponding to the upper limit voltage, denoted as Ccha;

Then, charge the power battery at 1C rate current at 25°C, from SOC 0 to the charging capacity (Ah) corresponding to the upper limit voltage, denoted as Cdis_25;

Carry out the calculation of Ccha/Cdis_25 to obtain the charging capacity.

Measurement data: charging current and charging time, discharging current and discharging time, charging capacity and discharging capacity, temperature.

2. Driving range ability test:

First, carry out the 1C rate discharge experiment of the power battery under the environment of 0℃～40℃. The initial state of the power battery is SOC=100%, discharge to the cut-off voltage, and record the discharge energy (Wh) record;

Then, based on the corresponding relationship between the discharge energy and the driving range, the driving range is obtained.

Measurement data: discharge current, discharge time, battery voltage, discharge energy.

3. Vehicle starting ability test:

Within the specified start-up time, test the ability of the power battery to continuously output the required constant power in an environment of 0°C to 40°C.

Measurement data: discharge current, discharge time, discharge power

4. Brake energy recovery capability test:

First, conduct a braking experiment at 0°C to 40°C (during braking, the power battery is in a charging state), and record the charging energy Echa_brk;

Then, record the braking output energy Ebrk;

Calculate Echa_brk/Ebrk.

Charging energy Echa_brk: the integral value of the product of charging current, battery voltage and battery charging time during braking;

Braking output energy Ebrk: the integral value of the product of charging current, battery voltage and braking process time;

Battery charging time during braking: the time it takes to charge to the upper limit voltage during braking (battery charging time during braking <= braking process time).

Measurement data: charging current and charging time during braking.

5. Energy efficiency capability test:

First, carry out the power battery 1C rate current charging experiment under the environment of 0℃～40℃, and charge the charging energy (Wh) corresponding to the upper limit voltage from SOC 0 to the upper limit voltage, which is recorded as Echa; then carry out the power battery 1C under the environment of 0℃～40℃ In the rate current discharge experiment, the discharge energy (Wh) corresponding to the discharge to the cut-off voltage is recorded as Edis;

Use Echa/Edis to calculate energy efficiency and evaluate energy efficiency capability.

Measurement data: charging current, charging time, charging voltage; discharging current, discharging time, discharging voltage

6. 0℃～40℃coulombic efficiency capability (under the same temperature, the ratio of battery discharge capacity Cdis(Ah) to the charging capacity Ccha(Ah) in the same cycle, Ccha/Cdis) test:

First, carry out the 1C rate current charging experiment of the power battery under the environment of 0℃～40℃, and record the charging capacity Ccha(Ah) of the battery;

Then, the 1C rate current discharge experiment of the power battery under the environment of 0℃～40℃, record the battery discharge capacity Cdis(Ah);

Perform Ccha/Cdis calculations to evaluate Coulombic efficiency.

Measurement data: charging current, charging time; discharging current, discharging time.

Step 2. The power battery performance test device for hybrid electric vehicles passes through the CAN bus, and the charging capacity, discharging capacity, acceleration capacity of the whole vehicle to 100 kilometers, starting capacity of the whole vehicle, braking energy recovery capacity, energy efficiency, Coulomb The test data of efficiency capability is sent to the power type power battery capability evaluation control module for hybrid electric vehicles;

Step 3. The power type power battery capability evaluation control module for hybrid electric vehicles respectively calls the charging capacity evaluation subroutine module, the discharge capacity evaluation subroutine module, and the vehicle's 100-kilometer acceleration capability in the power type power battery capacity determination database for hybrid electric vehicles. The evaluation subroutine module, the vehicle startability evaluation subroutine module, the braking energy recovery ability evaluation subroutine module, the energy efficiency evaluation subroutine module, and the Coulomb efficiency ability evaluation subroutine module respectively obtain the evaluation criteria of seven test test data;

Step 4. Use each subroutine module called in step 3 to test the charging capacity, discharging capacity, acceleration capacity of the vehicle to 100 kilometers, starting capacity of the vehicle, braking energy recovery capacity, energy efficiency, and coulombic efficiency capacity obtained in step 1. These seven test test data are correspondingly evaluated for capability, and seven capability evaluation conclusions for power-type power batteries for hybrid electric vehicles are obtained.

Specific implementation mode three:

Different from the second specific embodiment, in the evaluation method of the power-type power battery evaluation system for hybrid electric vehicles in this embodiment, the process of evaluating the corresponding capabilities of the seven test test data described in step 4 is as follows:

Evaluation basis: According to the seven ability tests of charging ability, discharging ability, 100km acceleration, vehicle starting ability, braking energy recovery ability, energy efficiency and coulombic efficiency at an ambient temperature of 0°C to 40°C, compare the corresponding performance of each ability at 25°C Based on the test results, the seven-item capability evaluation conclusions of power-type power batteries for hybrid electric vehicles are obtained;

Evaluation conclusion: compared with the corresponding indicators of each ability at 25°C,

When the ambient temperature is from 0°C to 10°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle start-up capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are all capabilities at 25 °C. More than 90% of the corresponding indicators are evaluated as excellent;

When the ambient temperature is from 0°C to 10°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle start-up capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are all capabilities at 25 °C. More than 80% of the corresponding indicators are evaluated as good;

When the ambient temperature is from 0°C to 10°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle start-up capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are all capabilities at 25 °C. More than 70% of the corresponding indicators are evaluated as qualified;

When the ambient temperature is 0°C to 10°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle starting capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are all capabilities at 25 degrees. Below 70% of the corresponding indicators, the evaluation is poor;

When the ambient temperature ranges from 10°C to 40°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle start-up capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are corresponding to each capacity at 25 °C. More than 95% of the index, the evaluation is excellent;

When the ambient temperature ranges from 10°C to 40°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle start-up capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are corresponding to each capacity at 25 °C. More than 90% of the index, the evaluation is good;

When the ambient temperature ranges from 10°C to 40°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle starting capacity, braking energy recovery capacity, energy efficiency, and coulombic efficiency capacity are corresponding to each capacity in the state of 25 degrees More than 80% of the indicators are evaluated as qualified;

When the ambient temperature ranges from 10°C to 40°C, the seven capabilities of charging capacity, discharging capacity, vehicle acceleration capacity of 100 kilometers, vehicle start-up capacity, braking energy recovery capacity, energy efficiency, and Coulomb efficiency capacity are corresponding to each capacity at 25 °C. Below 80% of the index, the evaluation is poor.

Claims (3)

1. a Hybrid Vehicle power-type electrokinetic cell evaluation system, is characterized in that: Hybrid Vehicle power-type electrokinetic cell evaluation system specifically comprises:

For the Hybrid Vehicle power-type electrokinetic cell ability evaluation and test control module of data base call;

For the Hybrid Vehicle power-type electrokinetic cell ability decision data storehouse that cell potential is evaluated; Wherein, described Hybrid Vehicle power-type electrokinetic cell ability decision data storehouse also comprises:

Charging ability for evaluating Hybrid Vehicle power-type power battery charging ability evaluates subroutine module,

Discharge capability for evaluating Hybrid Vehicle power-type electrokinetic cell discharge capability evaluates subroutine module,

Car load hundred kilometers of acceleration capacities for evaluating Hybrid Vehicle power-type electrokinetic cell car load hundred kilometers of acceleration capacity blocks evaluate subroutine module,

The car load starting ability for evaluating Hybrid Vehicle power-type electrokinetic cell car load starts merit rating subroutine module,

For evaluating the Brake energy recovery merit rating subroutine module of Hybrid Vehicle power-type electrokinetic cell Brake energy recovery ability,

For evaluating the energy efficiency merit rating subroutine module of Hybrid Vehicle power-type electrokinetic cell energy efficiency ability,

For evaluating the coulombic efficiency merit rating subroutine module of Hybrid Vehicle power-type electrokinetic cell coulombic efficiency ability.

2. utilize an evaluation method for above-mentioned Hybrid Vehicle power-type electrokinetic cell evaluation system, it is characterized in that:

Step one, be under the condition of 0 DEG C ~ 40 DEG C in environment temperature, use that electrokinetic cell performance testing device starts ability to the voltage of Hybrid Vehicle power-type electrokinetic cell, electric current, charging ability, discharge capability, car load hundred kilometers of acceleration capacities, car load, Brake energy recovery ability, energy efficiency, coulombic efficiency ability, temperature and time parameter are tested;

Step 2, Hybrid Vehicle electrokinetic cell performance testing device are by CAN, and the test data of charging ability step one recorded, discharge capability, car load hundred kilometers of acceleration capacities, car load startup ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability sends Hybrid Vehicle power-type electrokinetic cell ability evaluation and test control module to;

Step 3, the charging ability that Hybrid Vehicle power-type electrokinetic cell ability evaluation and test control module is called in Hybrid Vehicle power-type electrokinetic cell ability decision data storehouse respectively evaluates subroutine module, discharge capability evaluates subroutine module, car load hundred kilometers of acceleration capacities evaluate subroutine module, car load starts merit rating subroutine module, Brake energy recovery merit rating subroutine module, energy efficiency evaluates subroutine module, coulombic efficiency merit rating subroutine module obtains the interpretational criteria of seven testing experiment data respectively,

Step 4, each subroutine module utilizing step 3 to call, to step one test obtain charging ability, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, these seven testing experiment data of coulombic efficiency ability, carry out merit rating accordingly, draw seven merit rating conclusions of Hybrid Vehicle power-type electrokinetic cell.

3. the evaluation method of Hybrid Vehicle power-type electrokinetic cell evaluation system according to claim 2, is characterized in that: the process that seven testing experiment data described in step 4 carry out the evaluation of respective capabilities is,

With the corresponding Indexes Comparison of each ability under 25 DEG C of states:

When environment temperature be 0 DEG C to 10 DEG C charging ability, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 DEG C of states the corresponding index of each ability more than 90%, be evaluated as excellent;

When environment temperature be 0 DEG C to 10 DEG C charging ability, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 DEG C of states the corresponding index of each ability more than 80%, be evaluated as good;

When environment temperature be 0 DEG C to 10 DEG C charging ability, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 DEG C of states the corresponding index of each ability more than 70%, it is qualified to be evaluated as;

When environment temperature be 0 DEG C to 10 DEG C charging ability, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 degree of states the corresponding index of each ability less than 70%, be evaluated as difference;

When the charging ability of environment temperature 10 DEG C to 40 DEG C, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 DEG C of states the corresponding index of each ability more than 95%, be evaluated as excellent;

When the charging ability of environment temperature 10 DEG C to 40 DEG C, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 DEG C of states the corresponding index of each ability more than 90%, be evaluated as good;

When the charging ability of environment temperature 10 DEG C to 40 DEG C, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 degree of states the corresponding index of each ability more than 80%, it is qualified to be evaluated as;

When the charging ability of environment temperature 10 DEG C to 40 DEG C, discharge capability, car load hundred kilometers of acceleration capacities, car load start ability, Brake energy recovery ability, energy efficiency, coulombic efficiency ability seven abilities under being 25 DEG C of states the corresponding index of each ability less than 80%, be evaluated as difference.