Hilti New tools – NURON
The new NURON batteries have a few key features that are completely new concepts for Hilti. They include a re-engineered battery/tool interface and electronics design as well as a completely redesigned housing. These combine to offer a tougher battery better able to withstand daily weather and job site rigors. Along with the battery upgrade, Hilti has updated over 70 power tools to take advantage of the larger capacity packs including the use of brushless motors, which is long overdue! Hilti promises that these batteries will:
“enable a step-change in 22-volt cordless performance and power tool classes previously only possible on higher-voltage platforms, gas or electric powered while… Delivering more than double the power of their current 22V tools.”
How do the batteries deliver more power? Well its really just some simple math. Using a basic water pipe analogy to help visualize it, you can either increase the size of the pipe (Current/Amps) or the water pressure (Voltage) to increase the overall water power.
Power (Watts)= Voltage (Volts) * Current (Amps)
As we’ve shown on other Brands and in our Head-to-Head testing every battery pack has a certain total amount of energy (potential power) to do work. With tools that use a single voltage like NURON, it’s a very simple equation. Below is one example of one pack size.
Using the B22-255 as a high power example, we see that with a fixed voltage of 22V (21.6 v nominal), the B22-255 is able to deliver 259 watt-hrs with a 12 Ah battery pack. Compare this to a tool that is 60V (54 V nominal) with a 2 Ah power that only produces 108 watt-hrs of energy. As you can see voltage isn’t the end all be all, it’s the total power available to do work.
NURON B22-255 Math: 259 Watt-Hrs = 21.6 Volts x 12 Amp-hours (Hilti lists this as a 255 Watt-Hr Pack)
Battery Interface Design
The battery interface now uses a spring-based design to decouple the attachment prongs from the battery housing. This means that the tool-based vibrations aren’t directly carried into the battery housing via the connection terminals. This produces less friction-based wear and tear on the connection port and will likely lead to less cracking or breaking of connection port components. The new Hilti 22V NURON Battery also use braided 12 gauge copper cables at the connection port, which remain more flexible and less brittle compared to solid wires.
This is definitely an exciting design enhancement as we’ve seen failures of these connection points on other Brands especially in large capacity tools with a lot of vibration and impact loading.
The main improvement to the electronics is a “potted” vs. lacquered protective (vs some competitors; all current Hilti batteries are also potted) covering on the internal circuit boards and integrated chips. What does this mean? That the electronics components are set in an epoxy style resin based for improved dust, moisture, and corrosion resistance. It also further protects vibration-based damage to internal electronic components by transferring unintended vibrations to the battery housing instead of to the smaller (and more fragile) electronic components. This is a long overdue upgrade that many other Brands have also incorporating that drastically improves the durability of the packs.
The battery housing includes integrated bumpers in the all-glass-fiber housing and a cell holder that completely surrounds the batteries. This offers great fall and impact protection to the Lithium-Ion battery cells. The battery housing was also redesigned to include less open space between the cells. At first this seemed counterintuitive for cooling purposes. But, Hilti engineers explained that the cell holder material in contact with the cells helps better control and slow down heat build-up during an application.
Battery Size Spectrum
With a wide range of battery pack sizes (Amp-Hours) users can select packs that offer sufficient available energy (think of a gas tank size) for the task. As we showed above, higher voltage isn’t the only way to get more work done, Hilti is making larger packs that allow much higher amp draws for high demand applications.
With Hilti’s B22-255 (12Ah) double loaded (some new tools will use 2 battery packs), you get to a class of power output, especially when optimized in a higher-output timeline, that actually can be equated to corded power (110V, 15A). And can absolutely compete with 36V, 48V and 60V battery platforms.
And to make it easy, Hilti is releasing their new NURON batteries in 4 different sizes:
B22-55: 2.6 Ah Pack – 55 Watt-Hours
B22-85: 4.0 Ah Pack – 85 Watt-Hours
B22-170: 8.0 Ah Pack – 170 Watt-Hours
B22-255: 12.0 Ah Pack – 255 Watt-Hours