Battery overcharge on Braking

More interesting than the voltage would be the charge current. Could you post what that's doing?

Even better would be to post that and also the battery state of charge (SoC).

Have you used either Dr. Prius or Carista to find out what the trouble codes are behind the warning triangle before you reset it? If you post those codes here, we can be more help.

 

So when you're swapping these two battery packs in and out of the car are you looking under the silver cover sensors nuts ECU plug all things like that come to mind take a picture maybe and looking for frosted nuts black bus bars it should be copper or silver hard metal etc sensor wiring that's not copesthetic broken etc ECU battery ECU plug corrosion and wiring issues etc seems to me I wouldn't be having the batteries going in and out of the car without looking under the hoods of the said batteries.

 

There's nothing excessive about a 13 or 14 amp charge rate applied to a battery that's 30% or 49% charged.

 

P0A7F and P0A80 are set according to two different ways of measuring a battery's health, but they seem to have reached the same conclusion about this battery.

 

Maybe that's an overinterpretation of the values Dr. Prius was showing?

The car's judgments for P0A7F and P0A80 involve more than snapshots of voltages.

I wonder if you might just be running up against the limits of reconditioning. Many people do seem to report some improvement, but few report that it's completely effective or can be kept up indefinitely.

 

Folks like the hybrid Doctor that have skin in the game of the EV battery business can make reasonably short work out of the whack-a-mole and all the nonsense that we have to do in our carports or whatever we're doing hobby charging single cells etc etc I mean seriously that's for somebody that their time is invaluable to them or to everybody I don't know That's a lot of time breaking down three batteries charging up three sets of modules racking them back up cleaning bus bars and nuts without a tumbler or anything like that My goodness nah seems pound foolish to me but that's that so far every battery I've had rebuilt by people like the hybrid doctor that are in the game to win so far are doing quite well I've got almost 2 years on one without any problems. Now I'm not here trying to wear them out and run massive tests on them every day either I'm just driving my car minding my business and running my service calls which is about 3 to 600 mi a week generally speaking so we are driving the cars

 

You may want to check your brake pads.
When was the last time you serviced the system with new brake fluid?

The pack can take the current just not for a long time.

You could press harder on the brakes so not to overcharge the battery using the regen.

 

The "Red Triangle of Death" is a warning indicator that appears on some Toyota and Lexus hybrid vehicles, indicating a problem with the hybrid system. It's important to address this issue as soon as possible, as it can lead to further damage to the vehicle if left unresolved.

Regarding the spike in traction battery charge when applying the brakes, this is not a common issue and could potentially be caused by a faulty regenerative braking system. The regenerative braking system is responsible for converting the kinetic energy of the vehicle during braking into electrical energy to recharge the traction battery.

I have a Chery Tiggo 4 Pro.I would recommend consulting with a qualified mechanic or hybrid specialist to diagnose the issue and determine the appropriate course of action. They may need to perform further diagnostic tests using specialized equipment to identify the root cause of the issue.

In the meantime, I would recommend avoiding heavy braking and driving at high speeds until the issue is resolved. It's always better to err on the side of caution when it comes to hybrid vehicle issues.

 

The first post presented pack voltage, not SoC or charge current. Those were presented in a later post, and 13 or 14 amps charge current at 30% or 49% charge really aren't anything to hang the word 'spike' on.