Reading through this patent application (2024-022343) was a “huh, I never thought of that” moment. Canon in this patent is concerned that when some of its high-speed sensors go full out, they draw too much current from the battery causing the voltage to dip. If the voltage dips under certain amounts, there's not enough voltage to power the voltage regulators for the electronics on board the camera. When that happens, undesirable effects such as freezing and general camera failure may occur.
I can't recall as much as I would like about overall battery performance. Still, at the 10,000-foot level, every battery has an internal resistance – resistance internally will increase the voltage drop with current and also increase the heat dissipated from the battery. Both of these are bad things.
Canon expects to get around this by having a fairly large capacitor and charge circuit for the sensor so that it can self-manage these power spikes around high-speed operation and smoothen out the load from the actual battery.
I couldn't find any relevant data on Canon's latest sensors, but it seems like the older generations that Canon is currently selling can draw over 1A when they are running full out. It's most likely safe to assume that the sensors that are 20-30x faster than those, are drawing far more power.
All in all, I find these sorts of patents interesting because it shows that Canon is looking to push the boundaries further than what they have done before and they need to increase stability. It also indicates to me, that we most likely have a camera that is even faster than the ones we have seen to date, if this is active research.
Also, another thing I pondered and thought about when I was writing this brief was, that if you are having odd crashes on your camera, you may want to see if the same problem happens when you USB-C power, or power from a dummy battery source (such as the Canon ACK-E6N adapter kit). It could be a sign that your sensor is drawing too much power for your current battery and that you need to replace it. Lithium batteries lose voltage over time and use, so if the power draw causes the voltage to dip, combined with an older battery – this can cause some random weirdness. Food for thought.
Source: Japan Patent Application 2024-022343
Maybe they have invented some circuitry which can incorporate a capacitor in a step-up/step-down regulator with extremely high efficiency and stability?
*) Zinc-Air batteries for hearing aids (10A, 312, 13, and 675) can sustain ludicrously low currents, so you have to use a trick like this to support a 2.4GHz radio which draws way more than what the Zn-Air battery can deliver. The internal impedance of 8-12 Ohms doesn't help either.