New energy vehicle power battery charging and discharging control system and method
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A charge-discharge control, power battery technology, applied in battery/fuel cell control devices, battery circuit devices, current collectors, etc. Precisely controlled, easily modifiable effects
Active Publication Date: 2021-02-09
DONGFENG MOTOR CORP HUBEI
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[0003] The existing public battery charge and discharge control methods fully take into account the impact of battery performance attenuation, balance, temperature and other factors on battery charge and discharge, but do not consider the performance requirements of the entire vehicle, motor and other uses when controlling battery charge and discharge. Performance of electrical accessories
If the demand of electrical accessories such as the vehicle and the motor is not considered in the charge and discharge control, it will also have an impact on the performance of the vehicle
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Embodiment 1
[0088] 1. When the vehicle enters the sports mode, the torque required by the vehicle is large, and the maximum output torque of the engine cannot meet the demand, then the battery needs to provide more power to the motor to supplement the insufficient torque of the vehicle. At this time, the priority order is obtained:
[0089] Put the power battery charge and discharge current correction factor [H1, J1] corresponding to the driving mode in priority 1;
[0090] 2. In autumn, when the ambient temperature is 2 degrees, the influence factors [E(N), F(N)] of the power battery use environment on the charge and discharge current are placed in priority 2;
[0091] 3. The road conditions are good during the day, the lights are not turned on, the air conditioner is not turned on, and only the blower is used, ignoring the power battery charge and discharge current correction factors [G1, K1, L1, M1, N1] corresponding to the electrical equipment in the car;
[0092] 4. The battery is ne...
Embodiment 2
[0096] 1. When the car is moving forward at a speed of 60km / h, the air conditioner and lights are all turned off. At this time, according to the value obtained, the priority is sorted:
[0097] 2. The power battery charge and discharge current correction factor [H1, J1] corresponding to the driving mode is no longer placed in priority 1, but ranked fourth, which is ignored;
[0098] 3. The temperature of the battery has risen to 40 degrees, and the priority of the impact factor [A(N), B(N), C(N)] of the battery performance on the charge and discharge current should be increased to 1;
[0099] 4. The priority of the influence factor [E(N), F(N)] of the power battery use environment on the charging and discharging current is 2;
[0100] 5. The power battery charge and discharge current correction factors [G1, K1, L1, M1, N1] corresponding to the electric equipment in the vehicle are priority 3, and the discharge factors of the batteries are corrected:
[0101] Corrected power ...
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Abstract
The invention relates to a new energy vehicle power battery charging and discharging control system, which comprises a battery performance influence factor calculation module, a power battery use environment influence factor calculation module, a whole vehicle demand performance influence factor calculation module, an in-vehicle electric equipment influence factor calculation module and a power battery charging and discharging current correction module, the influence of the performance of the battery and environmental factors on the battery, the performance requirement of the whole vehicle andthe performance of electric equipment are all considered in charging and discharging control factors, different types of influence factors are subjected to modular development, in the module, the influence of the influence factors on charging and discharging of the power battery is analyzed, and a correction influence factor is given to charging current; and meanwhile, the charging and discharging current of the power battery is corrected according to the control priority, so that more accurate control is achieved.
Description
technical field [0001] The invention relates to the technical field of new energy vehicle battery control, in particular to a charging and discharging control system and method for a power battery of a new energy vehicle. [0002] technical background [0003] The existing public battery charge and discharge control methods fully take into account the impact of battery performance attenuation, balance, temperature and other factors on battery charge and discharge, but do not consider the performance requirements of the entire vehicle, motor and other uses when controlling battery charge and discharge. performance of electrical accessories. If the demand of electrical accessories such as the vehicle and the motor is not considered in the charge and discharge control, it will also have an impact on the performance of the vehicle. Contents of the invention [0004] The purpose of the present invention is to provide a new energy vehicle power battery charge and discharge contr...
Claims
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Application Information
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