T/CSAE 44-2015 in English
VALIDEvaluation and test methods for regenerative braking energy recovery rate of pure electric passenger vehicle
- Issued on:2015-11-05
- Implemented on:2015-11-05
- File Format:PDF
- Delivery:Via email within 5 business days
$243.00
Introduction
Analysis of the core content of the standard
This standard establishes for the first time a complete technical framework for regenerative braking energy recovery for pure electric passenger vehicles, focusing on standardizing the test methods in two major scenarios: chassis dynamometer and road test, and quantifying the energy recovery efficiency through two types of indicators: single operating condition and cyclic operating condition.
Key terminology
| Terms | Definition | Unit of measurement |
|---|---|---|
| Recoverable energy | Kinetic energy change minus windage and rolling resistance loss | kWh |
| Regenerative braking energy recovery rate | Energy storage device recovered energy/recoverable energy | % |
| WLTC cycle condition | Standardized test process including 47 brakes | - |
Test method comparison
Chassis dynamometer test
It is necessary to simulate the road load and use a four-wheel drive dynamometer to avoid ABS system misjudgment. It is required to complete 4 valid WLTC cycle test conditions, and the speed tolerance must comply with the requirements of GB18386-2005.
Road test
The energy recovery rate under 0.3g braking intensity must be verified. The pedal force calibration must be used to ensure that the deceleration is controlled within the range of 0.3±0.02g, and the pedal force error of ±2N is allowed.
Technology Evolution Analysis
This standard innovatively combines the ISO 8715:2001 electric vehicle test specification with the GB/T 21670 traditional braking requirements, and proposes for the first time:
- Battery SOC window control method (n/2±1 grid)
- Dual-mode energy recovery rate calculation formula (Formula 3/8)
- Dynamometer wheel speed signal correction scheme
Implementation suggestions
- Preferably use four-wheel drive chassis dynamometer to avoid system interference
- 300km running-in driving is required before road testing
- Strictly monitor battery temperature (15-32°C)
- The cycle test should complete 4 WLTC cycles in a row
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
T/SZS 2709-2020 in English
Shenzhen quality food—Milk powder
2020-08-31 -
T/CSAE 81-2018 in English
Performance requirements and bench test methods for energy-regenerationautomobile electronic stability control system
2018-09-03 -
T/CACM 1056.18-2017 in English
Chinese medicinal plants seeds and seedlings—Seeds of Huangjing (Polygonatum cyrtonema Hua,Polygonatum sibiricum Red and Polygonatum kingianum Coll.et Hemsl.)
2017-12-25 -
T/CATSI 02007-2020 in English
Fully-wrapped carbon fiber reinforced cylinder with a plastic liner for the on-board storage of compressed hydrogen as a fuel for land vehicles
2020-10-08 -
T/CCMA 0149-2023 in English
Technical requirements of hydraulic cylinder for rotary drilling rig
2023-05-08 -
T/CCOA 1-2019 in English
Flavor rapeseed oil
2019-01-15 -
T/CIE 167-2023 in English
Test specification for enterprise solid state disks―Part 3:Reliability test
2023-05-29 -
T/CECS 605-2019 in English
Design standard for H-shaped beam to RHS column connections using blind bolts
2019-07-08 -
T/CCGA 30007-2022 in English
Electronic chlorine trifluoride
2022-12-28 -
T/CIS 03001.1-2020 in English
Reliability of instrument or equipment—Verification and test method of the mean time between failures of complete machine
2020-03-01
