At first glance, choosing the right onboard
charger may seem complicated, but if you focus on the following dimensions, you
are almost done. So, what do you need to consider when choosing an onboard
charger
Battery Capacity
The battery capacity on new energy vehicles
will determine the power of the on-board charger. Generally speaking, it is
recommended to use a 3.3kw on-board charger for 35kwh batteries, and a 6.6kw on-board
charger for 40kwh batteries. If the conditions are met, 11kw can also be used.
When the battery capacity is above 80kwh, a 11kw/22kw on-board charger can be
selected.
Input Voltage
According to the charging standards of
different countries and regions, it is recommended to use the following
matching on-board chargers:
In areas where China or European charging
standards are used, single-phase 6.6kw on-board chargers can be used, or
three-phase 11kw on-board chargers can be used
In areas using American standard charging
standards, it is recommended to use a single-phase 6.6kw/10kw/20kw on-board charger.
Types Of Charging Pile
When using a single-phase charging pile, it
is recommended to use a 6.6kw on-board charger. If using a three-phase charging
pile, it is recommended to use 11kw and 22kw on-board chargers.
Product Size
Specifically, based on the space reserved
for the on-board charger during vehicle design, generally speaking, The smaller
the product size, the more favorable it is for the overall design of the
vehicle, which can reduce the weight of the entire vehicle. At present,
integration is one of the trends in automotive components, and product
solutions that integrate DC/DC converters, on-board chargers, and PDUs have
emerged.
Safety Requirements
With the development of electrification and
intelligence, more and more vehicles are equipped with electronic and
electrical systems, such as electric transmission system, power steering
system, auto drive system, etc. The original mechanical parts are replaced by
electronic devices. The introduction of such a complex electronic and
electrical system poses a great risk to the safety of the entire vehicle. The
aging or failure of a simple component may lead to system failure, leading to
accidents.
Therefore, the requirements for the safety
of automobiles and their related components are also increasing.
In order to achieve a higher level of
safety requirements, the ISO 26262 functional safety standard specific to the
automotive industry has been derived based on the general IEC 61508 standard
for safety in other industries. ISO 26262 requires on-board electronic and
electrical systems to activate protective or corrective devices upon detecting
potential hazardous situations to prevent hazardous events from occurring or
provide mitigation measures to reduce the consequences of hazardous events. In
short, the ultimate goal of functional safety is to ensure the safe operation
of the product, and to minimize harm even if problems arise.
EMI And EMC Concerns
Most electronic products offered for sale
are required to meet EMI and EMC (Electromagnetic Interference and
Electromagnetic Compatibility) regulatory requirements. The goals of the
regulatory requirements are to ensure the products do not interfere with the
operation of other products and that outside electrical noise does not prevent
the certified products from operating correctly. On-board charger can be
certified to comply with regulatory requirements, but the completed system is
certified in most applications, and the internal sub-circuits do not require
certification.
A knowledge of the basic issues associated
with on-board charger can help to simplify the selection process of these
components. By working with an experienced power supply company, such as LANDWORLD,
the effort required to complete the selection process can be minimized and
optimal on-board charger can be identified.
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