Method for calculating energy recovery rate of braking energy recovery system

A technology of braking energy recovery and calculation method, applied in electric braking systems, electric vehicles, vehicle energy storage, etc., can solve problems such as high cost, time-consuming, labor-intensive, etc., to save development costs, good manpower and equipment costs, The effect of saving manpower and equipment costs

Inactive Publication Date: 2017-11-03
CHERY AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

However, there is no easy way to calculate the energy recovery rate of the braking energy recovery system at present. Many OEMs calculate the energy recovery rate of the system by comparing the two tests with the braking energy recovery system on and off. , this method is time-consuming, laborious, and costly

Method used

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  • Method for calculating energy recovery rate of braking energy recovery system

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Embodiment 1

[0023] Such as figure 1 As shown, first, use the computer data line to collect the battery voltage (UBat) signal data and the battery current (IBat) signal data from the vehicle's battery management system (BMS) through the interface of the on-board automatic diagnosis system (ie, the OBD interface). Here, the signal data is collected under NEDC operating conditions (NEDC is the operating conditions under the European fuel consumption and emission assessment standards). Of course, it can also be collected under other operating conditions, such as UDC (Urban Cycle Operating Conditions) or EUDC (Suburban) Cycle conditions) and so on.

[0024] The collected signal data is transmitted to the computer through the computer data line, and the computer runs the INCA (Integrated Calibration and Application Tools) software. First, the MaxOf2Input function in the software is used to separate the current signal data into positive current and negative current. The collected current data is c...

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Abstract

The invention provides a method for calculating energy recovery rate of a braking energy recovery system. The method comprises the following steps: (1) collecting battery voltage signal data and battery current signal data; (2) using a function to separate the battery current signal data into positive currents and negative currents; (3) calculating the power corresponding to the positive currents and the negative currents; (4) calculating the energy corresponding to the positive currents and the negative currents by the integral of power over time; (5) calculating the ratio of positive energy to negative energy to obtain the corresponding energy recovery rate. Compared with a method of calculating the system recovery rate through multiple experiments by manually and forcibly turning on or shutting down the braking energy recovery system, the method provided by the invention is efficient and fast, and can better save manpower and equipment cost so as to save development cost for businesses.

Description

Technical field [0001] The invention relates to the field of braking energy recovery systems, in particular, the invention relates to a method for calculating the energy recovery rate of a braking energy recovery system. Background technique [0002] Braking energy recovery is one of the important technologies of modern electric vehicles and hybrid electric vehicles. The braking energy recovery system includes a generator, a battery and an intelligent battery management system that can monitor battery power. The braking energy recovery system recovers the excess energy released by the vehicle during braking or coasting, and converts it into electrical energy through a generator, which is then stored in the battery to drive the motor to increase the pure electric driving range and reduce Fuel consumption and acceleration performance are improved. The recovered energy can also supply power to the power-consuming equipment in the car, reducing dependence on the engine, fuel consumpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/10B60L11/18B60R16/02
CPCB60L7/10B60L58/10B60R16/02Y02T10/70
Inventor 王亚伟雷志王定文龚来智
Owner CHERY AUTOMOBILE CO LTD
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