Chinese battery from Alibaba doubles the range of an old BMW i3
China's Martigi Manufacturing (MTG) has launched a battery with high-density cells based on nickel-cobalt-manganese chemistry (NCM) for the discontinued BMW i3. The advanced storage unit could breathe new life into the outdated model.
Here's What We Know
One of the major drawbacks of the original BMW i3 is its modest range. Released in 2013, the hatchback in the base "60" version was equipped with a battery with a capacity of only 18.2 kW∙h (60 A∙h), which provided 81 miles on the American EPA cycle (about 130 kilometres) or 161 kilometres on the then-current NEDC in Europe. Over time, the model received 94 A∙h and even 120 A∙h batteries, the latter of which provided 153 miles (246 km) on the EPA or 309 km on the WLTP.
However, owners of the first versions of the i3 were left with outdated batteries that, in addition, lose efficiency over the years. In reality, the range of such cars can be reduced to 70 miles (about 110 kilometres), which is only enough for city driving.
MTG offers a solution - a battery pack with CATL cells. The new unit is physically compatible with all i3 variants and fits in the standard compartment, but has a significantly higher capacity of 54 kW∙h or 154 A∙h. This is 156 per cent more than the original 60 A∙h battery and 28 per cent more than the highest capacity factory version.
BMW i3 battery replacement kit. Illustration: MTG
The kit consists of 96 cells divided into eight modules, while retaining the standard voltage and configuration. A modified battery management system (BMS) is used for correct operation, as well as a new set of connectors and mountings. If you have the tools and experience, installation is possible in a garage, but the seller recommends specialised services.
MTG claims the new battery offers a range of around 400 kilometres (248 miles) on a mixed cycle. A video published by the company shows the BMW i3 travelling around 300 km (186 miles) on the motorway at an average speed of 100 km/h (62 miles per hour). The maximum DC charging power is unchanged, up to 50 kW.
The price of the new unit on the Alibaba site is $5,800 excluding shipping. A more affordable 120 A∙h version is also available for $4,800, which is a direct replacement for the original BMW battery. The manufacturer's warranty is three years or 2,000 charge-discharge cycles, although it remains an open question as to the availability of warranty service outside of China. That said, an original BMW battery costs around $15,000, not including installation.
Source: InsideEVs
