Hybrid battery cooling mod

Regardless of their mailing address Inngr is in china

 

Not everything made in china is substandard, the issue would be whether the product abides by US standards for safety.

 

The previous supplier got them from china as well. Odds are good its the same product with a different interface.

 

The casing looks the same as the one you are mentioning so odds are there are some shared physical components with a linked BMS. Auto balancing seems like a nice feature, however its all for nothing if we dont have specs on safety features...or worse the lack thereof.

I was real close to purchasing a pack, but im waiting until I have some definitive evidence these have a proper BMS. I doubt the supplier will send a demo but its worth a shot. I could see them doing a demo if I was California local but Im on the other side of the US...

 

It has to be a custom interface for every brand and then it needs extensive testing in the real world.

You only have one life to live and in this area its not worth the very real risk to you, your passengers and others sharing the road with you.

If you want more power and mpge buy a modern plugin.

 

Jack's Sodium Ion pack is proven. And safe.

 

Hot day today

 

Please reply with any specific questions so I can ask. From their responses I can deduce it just mimics the cell voltages but with lithium chemistry. Im not sure how to pose the questions.

 

Direct quote from INNRG POWER Solutions:

1. Cell Balancing (Voltage Equalization)
The most critical task of the circuitry during charging is balancing. Lithium-ion cells are sensitive to voltage variations; if one cell reaches a high state of charge (SoC) before the others, it risks over-voltage damage.
Passive Balancing: The circuitry uses shunt resistors to dissipate excess energy from fully charged cells as heat, allowing the lagging cells to "catch up" during the final phase of the charging cycle.

Active Balancing: More advanced systems redistribute energy from higher-voltage cells to lower-voltage cells, which is significantly more efficient and maintains better pack health over time.

2. The Protective "Guardrails" (OVP/UVP)

The circuitry acts as an independent safety layer that sits between the vehicle's main power systems and the lithium cells.

Over-Voltage Protection (OVP): If the charging current causes any individual cell to exceed its maximum safety threshold, the BMS immediately triggers a disconnect (often via high-amperage MOSFETs or contactors) to stop the current flow, regardless of what the vehicle's main computer requests.

Under-Voltage Protection (UVP): Conversely, during discharge, the circuit prevents cells from dropping below a critical voltage, which would permanently damage the lithium chemistry.

3. Thermal Management Integration

Lithium-ion batteries are more sensitive to temperature fluctuations than NiMH. The circuitry monitors integrated NTC (Negative Temperature Coefficient) thermistors placed throughout the module assembly.

Dynamic Throttling: If the internal temperature sensors detect a rise beyond safe limits during a charge cycle, the BMS communicates with the charging source to throttle (reduce) the charge current.

Emergency Interruption: If temperatures spike into a critical range, the circuitry completely terminates the charge/discharge path to prevent thermal runaway.

4. The "Translator" (ECU Handshake)
Since the vehicle's factory computer (the ECU or hybrid battery control module) expects NiMH voltage curves, your circuitry must act as a translator.

Data Emulation: The BMS circuitry monitors the actual state of the lithium cells and "translates" that data into signals the car’s ECU expects to see.

Managed Charging: It ensures the car’s regenerative braking or wall-charging logic never forces the lithium cells into an unsafe state by feeding the ECU calibrated data that keeps the system within the safe operating parameters of the spe


UPDATE: There appears to be more to the message...I will edit this to add the rest as it trickles in.

 

That message looks for the life of me as if they have sent you an AI summary of what a good BMS ought to do.

What I would be hungry for would be evidence that what they have actually built is a good BMS, and does that.

 

My thoughts were exactly the same, regurgitated AI summary...

It appears it just interfaces with the NiMH BMS to manage the lithium packs, in the manner he just spoke of. I appreciate everyones input, i really do. I told him I would probe him later as he was with his family. Seeing that he obliged to talk with me during his off time tells me he's a nice guy. I'll finish the conversation later this next week.

 

I chuckled that they're linking to my video.
On the one hand, for once we both agree that lithium products without a BMS are dangerous.
On the other hand, NexPower has gone on the record several times saying I don't know what I'm talking about. Seems contradictory for them to quote me as a reputable source, given they claim I'm not.

When I tore one apart last year, they did NOT have a BMS with per-cell supervisory control (required for lithium). I have a complete teardown video on my youtube channel.

FYI: My design is way further along than I've posted about in my thread. I will release details showing how my per-cell BMS works prior to selling the product. For example, here's the complete schematic for my existing Honda Insight product. I'll make the Prius battery schematic available, too, eventually.

I've actually already analyzed INNRG's pack and posted a youtube video about it.
In short, it doesn't have per-cell supervisory control. Instead, it has a two stage analog passive balancer circuit. Not safe for lithium.

I'll send you one for free... you pay shipping.

I get the '@' notifications here on PriusChat, too.

True...

Incorrect. I reply to every single message I receive. Often times my response is some form of "here's the video you should watch before we continue this conversation", but I NEVER simply ignore a message. Anyone who takes the time to write me will receive a response... sometimes that response will include a statement similar to "you need to watch xyz before we continue".

You've mischaracterized me. This isn't how I operate... I am more than happy to respond to private communications even if there's "nothing in it for me". What I won't do is provide private support; I require public postings for that.

I'm not trying to score a deal on a low price pack. Price isn't important to me; I always offer to pay actual cost plus a several hundred dollar finder's fee. Sometimes people decline this offer, which is fine, too. Ultimately my research is done in the public interest.

PM me your address and PayPal info and I'll let you know what the shipping cost is (probably under $10 if you're CONUS).

Just read the whole thread to figure it out.

Yeah, their circuit board isn't the BMS they claim.
They actually reached out to me last year asking me if I would review their product. I told them I had complete editorial control, which they agreed to. And then when I received the battery I was let down to see their claimed 'BMS' was nearly identical to NexPower's insufficient design.

I didn't mention INNRG name in this video for reasons described therein, but here's my review of their product as it existed 8 months ago:

Maybe in the past 8 months they've modified their design, but I find that unlikely for at least two reasons:
1: They haven't subsequently asked me to review said changes, and;
2: The design they show in the video linked previously doesn't have any method for a failing cell to alert the hybrid system that something is wrong.

Note: I (still) have not returned this review unit to INNRG, as they (still) have not sent me a return label. They've had eight months to do so, so at this point I consider their review unit as abandoned property.

 

Ill send him another message and ask him if those issues were resolved, because their website unless you know better because it was visited by you 8 months ago, claims these specifications exist...

 

Ive tried reviewing webpage caches from way back archives. Couldnt find any caches between now and 8 months ago orher than one...around 8 months ago. Doesnt mean the site was not up but it also was definct 8 months ago. So maybe they are back? Regardless, ill just ask the horse lol.

 

Im deadset on investigating