Page 21 - PEN eBook February 2024

AUTOMOTIVE AUTOMOTIVE

Figure 1: EV charging standards (Source: NXP Semiconductors)

Figure 2: The EVSE architecture is composed of two building blocks. (Source: NXP Semiconductors)
like a little robot, but it could be a charging device that For implementing the smart controller, different
comes up from the ground, from the side or from above approaches are available today. In his talk, Swinburn
like a pantograph. Therefore, the ISO 15118 standard is proposed the following three NXP solutions. This MCU has enough capability to support all the Additionally, this MCU integrates the Arm TrustZone
now taking over all of the functionality of charging that capabilities required to run a charging application, capability, thus enabling the isolation of applications in
was previously managed by different standards. Linux OS-based smart controller including ISO 15118, OCPP (a protocol for configuring a structured way, helping to manage and maintain the
This solution is based on the i.MX93 applications and monitoring a charging station) and security. This software and get certified.
EVSE BUILDING BLOCKS processor family, capable of delivering efficient ML solution reduces the costs of the end product and is
From NXP’s perspective, when we start thinking about acceleration and advanced security. The i.MX 93 ideal for residential environments. “For NXP, the key takeaways are platforms that allow
how to design and build an EV charging system, we can application processors are the initial ones in the you to reduce the time to market, because some of the
identify two distinct blocks, as shown in Figure 2. On i.MX portfolio to incorporate the adaptable Arm Entry-level controller integration work is already done,” Swinburn said. “We’re
the left-hand side, we have the power socket, which Cortex-A55 core, which enhances the performance This is the simplest and cheapest solution, supporting taking away some of that complexity, we’re already
manages the energy flow from the grid into the vehicle and energy efficiency of Linux-based edge only the ISO 50118 standard. Based on the LPC55S69 integrating some functions, and we’ve got
and accurately measures the transferred energy. On applications. Additionally, they feature the Arm Cortex-M33 dual-core MCU, it’s a very price- pre-certification. That accelerates the development
the right-hand side, isolated from the left, we have the Ethos-U65 microNPU—which empowers developers competitive way to implement an EV charging station. phase and reduces risks.”
smart controller, where all of the higher services, such as to design ML applications that are more capable,
communication, payment services, Plug & Charge or V2G, cost-effective and energy-efficient—and an Arm
are running. Cortex-M33 low-power security MCU.

As shown, each of the blocks is regulated by its The i.MX93 processor (Figure 3) features a four-lane
standards. low-voltage differential-signaling interface, meaning
it’s tolerant to a high-noise environment, so you can
NXP’S SOLUTIONS have your controller in one part of the system and
NXP Semiconductors has a wide portfolio of products your display can be separated from the first, ensuring
and solutions that can address the requirements of the high noise immunity. It also integrates all of the
building blocks shown in Figure 2. different communication standards that are used in
EV charging.
For metering and energy measurement, NXP showcased
at Fortronic 2023 a power socket board suitable for RTOS-based smart controller
implementing a three-phase 22-kW charger. It is based This solution is based on the MIMXRT1062DVJ6B
on the MKM35Z256VLQ7 microcontroller (MCU), enabling crossover MCU with Arm Cortex-M7 core with
single-chip one-, two- and three-phase electricity scalable flash and SRAM memories. This real-
meters, as well as flow meters and other precision time MCU operates at up to 600 MHz, offering 2D
measurement applications. The MCU also provides graphics, a camera, various memory interfaces and a
security with active and passive tamper detection with wide range of connectivity interfaces.
time stamping. Figure 3: The Linux OS-based smart controller (Source: NXP Semiconductors)

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