Transcript illustration of EVS-GTR Battery System Test Project and

An illustration of EVS-GTR Battery
System Test Project and Test Methods’
Adaption to Commercial Vehicles
Peter Wu, BYD
CONTENTS
1
Introduction
2
Current situation of related standards
3
Case analysis
4
EVS-GTR draft analysis
5
Conclusion
2
Introduction
About EVS-GTR
For electric drive road vehicles, EVS-GTR is an important
standard, which is
related to safety performance and RESS(rechargeable energy storage system).
From the perspective of principle and technique, EVS-GTR made clear safety
requirements and test methods for cars and RESS in two processes: in the process
of using and after collision. In addition, safety requirements and test methods for
RESS are stipulated in EVS-GTR.
3
Introduction
Heavy-duty Electric Commercial Vehicles
Heavy-duty electric commercial vehicles(e.g. e-buses, electric industrial vehicles)
play an important role in road vehicles. For the principle of voltage platform ,
electrical system and RESS, there are no differences between heavy-duty electric
commercial vehicles and passenger cars .
As an important
standard for electric drive road vehicles related to safety
performance and RESS, EVS-GTR should cover heavy-duty electric commercial
vehicles(e.g. e-buses, electric industrial vehicles) , and provide with guidance in
the process of design and manufacturing.
4
Current situation of related standards
Electric Commercial Vehicles are now in the scope of current international
standards for electric vehicles.
1. ISO 6469-1:Electically propelled road vehicles-safety specifications
Part 1: On-board rechargeable energy storage system
It is a file specifically aimed at on-board energy storage device of electric road
vehicle. It has made specific and detailed requirements on these test items
below and test methods: isolation resistance, clearance and creep age
distance, requirements for the emission of hazardous gases and other
hazardous substances, heat generation from RESS, over-current interruption,
specific RESS crash-test requirements of electric vehicle storage system.
Apparently, electric commercial vehicles are involved in ISO 6469-1.
5
Current situation of related standards
Electric Commercial Vehicles are now in the scope of current international
standards for electric vehicles.
2. Addendum 99: Regulation No. 100 Revision 1/ Revision 2: Uniform
provisions concerning the approval of vehicles with regard to specific
requirements for the electric power train
It is a standard specifically aimed at electric vehicle structure and functional safety .
It has made specific and detailed requirements on these test items below and test
methods: vibration, thermal shock and cycling, mechanical impact, fire resistance,
external short circuit protection, overcharge protection, over-discharge protection,
over-temperature protection, emission.
Apparently, electric commercial vehicles are involved in Addendum 99:
Regulation No. 100 Revision 1/ Revision 2.
6
Current situation of related standards
Electric Commercial Vehicles are now in the scope of current international
standards for electric vehicles.
3. UL 2580 : Standard for Safety for Batteries for Use In Electric Vehicles
It is a specialized security requirements for electric vehicle energy storage system.
There are clear requirements and test methods for energy storage system and cell
level, overcharge, short circuit, over discharge protection temperature, imbalanced
charging test, dielectric voltage withstand test, isolation resistance test, continuity
test failure of cooling/thermal stability system test, rotation test vibration endurance
test, shock test, drop test, crush test, and it has been included commercial vehicles
As a result, electric commercial vehicles are involved in UL 2580.
7
Current situation of related standards
NAME OF THE
STANDARDS
COUNT
RY/ARE
A
ISO 6469-1：:Electically propelled
road vehicles-safty specifications
SCOPE
IF COMMERCIAL
VEHICLES WAS
INCLUDED
Battery-electric vehicles/fuel-cell
vehicles/hybrid electric vehicles
YES
Road vehicles of categories M and N1,
with a maximum design speed
exceeding 25km/h
YES
internation
al
Addendum 99: Regulation No. 100
Revision 1/ Revision 2: Uniform
provisions concerning the approval
of vehicles with regard to specific
requirements for the electric power
train
Europe
UL 2580 : Standard for Safety for
Batteries for Use In Electric Vehicles
U.S
GB/T 18384.1 Electrically propelled
road vehicles - Safety specifications
China
electrical energy storage assemblies
such as battery packs and combination
battery pack-electrochemical capacitor
assemblies and the
subassembly/modules that make
up these assemblies for use in electricpowered vehicles as defined in this
standard.
Electric vehicles
YES
YES
8
Case analysis
Take electric buses and electric cars from some company for example:
Similarities:
1、DC voltage of vehicle energy storage system：60V~1500V;
2、Requirements of electrical performance are the same;
3、Energy storage systems: telecommunications lithium iron phosphate battery.
Difference: PACK quantity and PACK arrangement.
electric CAR
Battery type
electric BUS
telecommunications lithium iron phosphate battery
Cell voltage
3.2V
3.2V
Voltage
320V
540V
Battery capacity
250Ah*1 pack
250Ah*3 packs
Charging power
0.5C
0.5C
PACK number
1
3
Case analysis
RESS on commercial vehicles
Battery arrangement on cars and buses
cells in series/parallel —module
modules in series — PACK
RESS includes: one or more PACK in
parallel, along with additional equipments
Each PACK, along with additional devices
compose an independent system.
For RESS function and principle, there is no difference for car and buses.
The differences are electric quantity of each PACK, PACK quantity and PACK arrangement.
10
10
EVS-GTR draft analysis
Test items and test methods on EVS draft:
1、 Vibration
It can be replaced by subsystem. For commercial vehicles, vibration test can be done
individually on each PACK or multi-PACK, which can fully satisfy the requirements of this test
method.
2、Thermal shock and cycling
It can be replaced by subsystem . For commercial vehicles, this test can be done on modules
or individual PACK instead of RESS, which can fully satisfy the requirements of test method.
3、 Fire resistance
This test is not required if the lowest surface of RESS casing is more than 1.5m above ground.
And if the height is less than 1.5m, this test can be done by the supplier. For commercial
vehicles, this test can be done on module or individual PACK instead of RESS, which can
fully satisfy the requirements of test method
4、 External short circuit protection
It can be replaced by subsystem. For commercial vehicles, this test can be done individually
on each module, each PACK or multi-PACK, which can fully satisfy the requirements of this
test method.
11
EVS-GTR draft analysis
Test items and test methods on EVS draft:
5、Overcharge protection
It can be replaced by subsystem. For commercial vehicles, this test can be done
individually on each cell, each module or each PACK, which can fully satisfy the
requirements of this test method.
6、Over-discharge protection
It can be replaced by subsystem. For commercial vehicles, this test can be done
individually on each cell, each module or each PACK, which can fully satisfy the
requirements of this test method.
7、 Over-temperature protection
It can be replaced by subsystem. For commercial vehicles, this test can be done
individually on each PACK or multi-PACK, which can fully satisfy the requirements
of this test method.
12
Conclusion
After analyzing related standards and EVS draft, we can get:
According to international main standards about safety of electric vehicles and
RESS, there are no difference between commercial vehicles and passenger cars.
All the test items about RESS on commercial vehicles can satisfy its
requirement except the collision.
In consideration of current situation of electric vehicles market, battery types,
electrical system and voltage platform of electric commercial vehicles and
electric passenger cars are the same.
In conclusion, we suggest that EVS-GTR Battery System Test Project and
Test Methods can apply to electric commercial vehicles.
13
Thanks！