Power
discharging of a battery. The 6.5 digit resolution is needed to even get the smallest current variation of the battery. The resolution of a power supply can be compared to the resolution and a photo. In a picture of high resolution, much more details can be seen - the same is true for the resolution of a power supply. In a lot of applications, this can actually replace a digital multimeter which makes the setup easier and less connections to the DUT are required.
from the battery manufacturer’s data by entering the data into the pre-defined table or can be chosen from the default battery models. If the battery’s data is unknown, an additional application program helps to discharge the battery. From that it automatically calculates the battery model that can then be loaded into the power
supplies. With a R&S NGM202 it is even possible to simulate two batteries at the same time.
Both power supplies can operate as a source or a sink. That means that they automatically switch between these operating modes, which is crucial when simulating batteries, because there is a need to simulate the charging and
Batteries usually react very fast. This is why it is important to have a fast load recovery time. The R&S NGM and R&S NGU power supplies have a load recovery time of less than 30 microseconds. There's also a minimum overshoot once there's a change of load. Another feature is the high-speed data acquisition. An acquisition rate of up to
500 ksamples per second leads to voltage and current readings every two microseconds. The power supplies have multiple measurement ranges. The R&S NGM has four measurement ranges for current, the R&S NGU even has six of them. This means a resolution up to 10 nA on the R&S NGM power supplies and even up to 100 pA on the R&S NGU. Also, the power supplies feature various interfaces like Digital I/O, Ethernet, USB, WiFi and GPiB.
Optimization for battery management systems With the BMS test system, it is possible to shorten the time to market through flexible, fast test and optimization of the cell monitoring controller. There are reduced risks through the reproducible testing for BMS optimization and validation with single battery cell emulation. This enables you to simulate different failure stages and simulate the charge and discharge of battery cells. With Rohde & Schwarz’ modular concept and scalable design the user gains high flexibility. The system is very user friendly and offers an easy system integration with a rack adapter and rear connections.
www.rohde-schwarz.com
Omron adds low contact resistance relays for EV chargers and PV-powered homes
Omron Electronic Components Europe has expanded its high-power switching capability with the addition of a low contact resistance model for the successful 2 pole contact type G7L-2A-X series relays
W
ith a 6.0mm contact gap, the new G7L-2A- X-SI relay provides low contact resistance of maximum 10mΩ and
a rated load of 30A at 600V DC, or 25A at 1000V DC.
The G7L-X series conforms to UK and IEC solar inverter standards, as well as applicable UL and VDE electrical standards. Features of their design include an assisting magnetism circuit, to help achieve a very quick switchover. The relay contacts have been specifically designed to handle very high DC loads that are a feature of this application. Contact forms is 2 pole DPST and its 6.0mm contact gap ensures improved safety.
Driven by the trends for higher capacity and increasing heat generation issues, the
www.cieonline.co.uk.
G7L-X series enables reduced charging time for vehicle charging and offers high capacity for residential energy storage systems and battery storage management. In comparison with similar level competitive relays, the G7L- 2A- X-SI has a larger contact gap, low contact resistance, and bidirectional switching ability. Capable of 6,000 operations at 600V DC, or 100 operations at 1000V DC, the relays provide higher capacity and low heat generation. The device is compact for a relay with this capacity: it measures just 52.5 x 35.5 x 41.0 mm.
The new G7L-2A-X-SI relays are available now from Omron Electronic Components Europe as well as its partners, authorised stockists and resellers.
https://www.omron.com/global/en/ Components in Electronics June 2023 57
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