The battery charge amount in 30 minutes is measured by using EV quick charger.

EV リーフの充電量　(実測値)

• Tested car: Nissan LEAF
• The EV quick charger is 44kWh.

The following picture is an example of a quick charger,

（The latest update: April 10th, 2024）

（The first upload: December 20th, 2019)

Definitions:

• State of Charge (SOC) is a measure of the level of charge of an electric battery relative to its capacity. It is expressed in percentage.
• Chage Amount is the amount of charge added to the battery in 30 minutes, and it is expressed in percentage.

Charge Amount vs Temperature vs SOC at the Start of Charging

The following 3D figure shows the battery charge amount, the temperature and the SOC at the start of charging. The horizontal axis is temperature, and the vertical axis is the charge amount. The depth axis is the SOC at the start of charging. Each bar is expressed in 3 colors depending on the SOC at the start of charging (blue < 40%, 40%<yellow<50%, 50%<pink).

• Charge Amount decreases as the temperature becomes low, and it increases as the temperature becomes high. For example, when the SOC at the start of charging is 32%, Charge Amount is 50% at 25/31 ℃, although Charge Amount is 45% at 15℃.
• Charge Amount increases when the SOC at the start of charging is low. For example, Charge Amount is 37%, when the SOC at the start of charging is 41%, however Charge Amount is 30%, when the SOC at the start of charging is 51%.

The following figure is 2D expression, where the SOC at the start of charging is expressed in 3 colors depending on the SOC at the start of charging (blue < 40%, 40%<yellow<50%, 50%<pink). As clearly indicated in the graph below,

• If the SOC at the start of charging is larger, Charge Amount is less.
• If the themperature is lower, Charge Amout is larger.

Charge Amount vs Temperature (Monthly Average)

Charge Amount vs the charging time (the elapsed time since the start of charging)

As shown above, Charge Amount varies with the temperature and the SOC at the start of charging. Here, the relation between the SOC and the elapsed time since the start of charging is shown in the following figure.

As shown above, Charge Amount is larger, as the temperature is higher and the SOC at the star of charging is lower.

Charging at home

In this case, the 200V/15A tap is used. The following is an example.

200V/15A tap for EV use.

The voltage is measured as 204V。

The braker for 200V/15A.