Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

arstechnica.com

Post reply on HN
Print view View original

11–20 of 103 posts

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#11

Post by jcsager »

sandworm101 wrote: post #8

> have a minute to plug in? Still sufficient to get from 10 to 35 percent state of charge. Scaling that to something the size of an EV pack will require one massive cable/connector. Call it 5kw/h in 1/60 hours, thats 3000kw, at 700v thats still roughly 4000 amps. (Please correct my head math.) Charging one car could suck up more power than an entire neighbourhood. Say four or five chargers operating at once ... every…

Fjord ferries in Norway are up around that sort of charge rate, but for 30 mins instead of 5. That kind of battery charging performance is pure marketing until our local LV supply network is uplifted!

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#12

Post by g4cg54g54 »

sandworm101 wrote: post #8

> have a minute to plug in? Still sufficient to get from 10 to 35 percent state of charge. Scaling that to something the size of an EV pack will require one massive cable/connector. Call it 5kw/h in 1/60 hours, thats 3000kw, at 700v thats still roughly 4000 amps. (Please correct my head math.) Charging one car could suck up more power than an entire neighbourhood. Say four or five chargers operating at once ... every…

chargers of that size generally have there own internal (sometimes even shared by multiple receptacles) batteries

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#13

Post by yorwba »

bayesianbot wrote: post #7
perching_aix wrote: post #4

Saw this yesterday, did not expect the competition around Donut's batteries to heat up this much and this quickly. Even the gravimetric density is fairly close, CATL's claim is 350 Wh/kg, compared to Donut's 400 Wh/kg. The safety and durability (plus no lithium) prospects of Donut's V1 battery are still big though (if the thing is actually real).

Feels quite clear Donut doesn't have much - no meaningful new tests released for many weeks already and some executive of Nordic Nano sued Donut Lab and said their claims were misleading. I haven't really followed that closely myself, but I've noticed the people who I saw defending Donut before have gone really quiet about it lately.

Donut's website claims that they will release the next test result in 7 days, so you can check next week whether those people will have something new to talk about: https://idonutbelieve.com

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#14

Post by xbmcuser »

DennisP wrote: post #9
c9lgPZqHNGdC1V1 wrote: post #3

Earlier quoted context omitted.

If anything, Nio battery swap stations would allow car users to swap to newer types of battery as they become available. I say this knowing Nio is one of CATL's most important partners[1]. [1] https://eletric-vehicles.com/catl/catl-calls-nio-an-irreplac...

That'd be an interesting situation. They'd probably replace their fleet of batteries gradually, so with each swap sometimes you'd get upgraded, sometimes downgraded. Your range and home charging curves would change with the batteries, and Nio would have to update the battery management software when it puts in a different battery type. But over time, you'd get upgraded on average without having to pay for a new batte…

Nio already has a service to swap to higher capacity battery if you want to go on a long road trip etc. It prices its cars according to battery capacity so even people that chose lower capacity car on purchase still have the option to swap to a higher capacity battery. Though I think the main use for battery swap technology will be for commercial trucking and if I recall correctly Chinese government and OEM are working on standardisation for that so all those truck batteries are swappable no matter which company builds the battery.

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#15

Post by xbmcuser »

maeln wrote: post #10
tristanj wrote: post #2

I did not expect Nio's 5-minute battery swap technology to become obsolete this soon.

We should always take marketing number with a huge grain of salt, so the 10 to 98% in 7 minutes remain to be seen. Also, there is the question of if it lowers the battery lifespan faster than charging at lower power. It is does, there might still be a point in battery swap, especially for public transport systems (for bus). A public transit operator might want to have more battery than vehicle, so that they can rotat…

the life span stat with the current battery tech is mostly useless for a normal car. 300 mile range most people will need to top up 2 times a week 100 times a year 1000 times in 10 years. The battery degradation is not that bad in the first place.

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#17

Post by SECProto »

sandworm101 wrote: post #8

> have a minute to plug in? Still sufficient to get from 10 to 35 percent state of charge. Scaling that to something the size of an EV pack will require one massive cable/connector. Call it 5kw/h in 1/60 hours, thats 3000kw, at 700v thats still roughly 4000 amps. (Please correct my head math.) Charging one car could suck up more power than an entire neighbourhood. Say four or five chargers operating at once ... every…

> Call it 5kw/h in 1/60 hours, thats 3000kw, at 700v thats still roughly 4000 amps. (Please correct my head math.)

5 kWh * 60 = 300 kW

at 800V (typical charging voltage) that is 375A

(still huge, but an order of magnitude less)

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#18

Post by est »

viraj_shah wrote: post #16

I didn't see a number for cycle life. That'd be my biggest question here. You can charge in less than 7 minutes but how many times before performance (capacity) degrades?

China had many >1M KM electric taxies. Usually they degrade after 200,000 km, and they are like 2 generations behind the latest ones.

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#19

Post by djcannabiz »

viraj_shah wrote: post #16

I didn't see a number for cycle life. That'd be my biggest question here. You can charge in less than 7 minutes but how many times before performance (capacity) degrades?

right at the end “After 1,000 fast charges, the battery should retain more than 90 percent of its original state of charge, the company said.”

Re: CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes

#20

Post by phh »

viraj_shah wrote: post #16

I didn't see a number for cycle life. That'd be my biggest question here. You can charge in less than 7 minutes but how many times before performance (capacity) degrades?

TFA says "After 1,000 fast charges, the battery should retain more than 90 percent of its original state of charge, the company said."

I can't really judge whether 1000 charges is a reasonable target for a car, though i think that 1000 fast charges is reasonable. It should probably be able to push to 5000 slow charges and 500 fast charges, which should fit a lot of use-cases.

Post reply on HN