Diamond Electric a leading manufacturer of ignition coils for automobiles have developed a “3 in 1” onboard charger (OBC). The 3 in 1 onboard charger for electric vehicles integrated three core functions into one package, a 6.6 kW charger, a 2.1 kW low-voltage DCDC converter (LDC) for auxiliaries, and a power delivery unit (PDU) to switch into fast charging. This feature enables system-level downsizing, reducing the weight of electric vehicles and expected to contribute to the spread of EVs.
As a countermeasure for global warming, EVs and PHEVs are spreading worldwide as CO2 reduction becomes more significant. EVs and PHEVs adopt more electronics components such as OBCs, and demand for downsizing and weight reduction of those components is growing.
In response, Diamond Electric has developed a “3 in 1” 6.6 kW OBC. The company’s transformer design and thermal management enabled the 30% downsizing of the product compared to the existing products. Furthermore, the “3 in 1” feature of the OBC, LDC and PDU integration into one package can substantially reduce the size and weight in the vehicle system and reduce the number of electronics components in EVs.
Onboard charger for electric vehicles specifications
|Dimensions||306 x 294 x 195 mm (excluding connectors)|
|Charging Power||6.6 kW|
|Maximum Charging Efficiency||95 %|
|Applicable Battery Voltage for Charging||250 to 420 V|
|LDC’s Output Power||2.1 kW|
|LDC’s Efficiency||90 %|
|LDC’s Output Voltage||9 to 16 V|
|PDU Functionalities||Relay for switching to fast charging|
Heater relay for air-conditioning
Heater relay for main battery
Connector for air-conditioner
Connector for inverter