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Tesla patent hints at more reliable batteries through ‘dynamic’ management system

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It is no exaggeration to state that Tesla’s business hinges on its battery technology. Fortunately for the company, its batteries are among the best in the industry today. This is particularly notable in the case of Tesla’s electric cars, as well as its energy storage products. In terms of vehicles, Tesla’s battery tech has reached a point where it is capable of supporting the demands of closed circuit driving, as is the case with the Model 3 Performance’s Track Mode. In terms of battery storage, the quality and performance of Tesla’s batteries have been so impressive in South Australia that it appears to have started an energy storage movement.

Considering Tesla’s reputation for never staying still, though, it is almost certain that the company’s batteries will improve over time. This was mentioned by Tesla’s President of Automotive Jerome Guillen to CNBC last November, when he noted that the company’s technology consistently evolves. In his segment, the executive noted that “the design of the (battery) cell is not frozen,” indicating upcoming improvements in the near future.

A recently published patent points to one of these battery tech improvements. Titled “Multi-Channel and Bi-Directional Battery Management System,” the patent describes a way for Tesla to push the envelope on its battery management system even further. In the patent’s description, Tesla noted that the increasing demand for battery-based power is putting an emphasis on the performance demands of management systems, which ensure proper operation within a range of products like electric vehicles and energy storage units.

While battery management systems perform vital functions, the units themselves could be subject to various external factors. In the case of electric cars, the system could be subject to mechanical vibration and shock, varying environmental temperature, multiple power domains and a large number of interference sources that could deteriorate signals between the centralized management controller and multiple battery integrated circuits. Considering that batteries are the only power source for electric vehicles, instances involving a failure of the system could render an electric vehicle inoperable. With this in mind, Tesla notes that there is a need for a battery management system that is “more robust and dynamic.”

Diagrams of Tesla’s battery management system. (Photo: US Patent Office)

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Tesla’s patent describes what could be dubbed as a redundant battery management system, comprising a first client coupled within a multi-channel, bi-directional and daisy-chained communication loop. The electric car maker also outlined a method for identifying a failure location within a battery management system. Tesla describes these as follows.

“The battery management system may include a host (such as a microcontroller that manages at a system level) and clients (such as battery management integrated circuits that manage battery cells within the system). In embodiments, the host may be implemented in various structures including the previously mentioned microcontroller and manages the system by transmitting commands and receiving responses from one or more of the clients. Each client may monitor and control corresponding battery cells to measure the electrical and physical status of the cells, such as voltage, amount of remaining electrical charge and temperature of each cell. For instance, the client 120a may monitor the cells 130a. It is noted that each client may monitor a different number of battery cells. The client 120a may perform measurements (e.g., voltage, charge, temperature, etc.) as well as perform certain functions (e.g., bleed-off charge from a battery cell, etc).”

Tesla further discussed its rationale behind its use of daisy-chain loops for its battery management system.

“The host and each client may communicate commands and responses via a daisy-chain transmission path loop, where the daisy-chain loop may include a pair of wires that transmit electrical signals therethrough. In embodiments, the daisy-chain loop may connect the interface of the host to the interfaces of the clients in series so that communication may serially occur on one or multiple channels within the loop. “

“The battery management system is able to provide redundant communication paths because of its ability to bi-directionally communicate along the daisy-chain loop and because the two channels used on the daisy-chain loop each allow access to completely separate and redundant battery management systems. Specifically, the host is able to communicate in a clockwise direction around the serially connected clients as well as communicate in a counter-clockwise direction along the loop. This bi-directionality allows the host to communicate with each client in case there is a single failure within the daisy-chain loop. This redundancy applies to both channels.”

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Ultimately, Tesla notes that these systems will result in what could only be described as “dynamic redundancy” across its battery management systems. This, of course, could foster a new generation of battery packs that are more reliable than the company’s already stellar batteries.

“One skilled in the art will recognize the use of a multi-channel signaling system as well as a bi-directional signaling architecture within the battery management system results in dynamic redundancy across the system itself. For example, if a primary or secondary circuit should fail on a client, the host may communicate a redundant command to the client using a different and fully operational channel. The multiple channel architecture ensures that even egregious malfunction of a sub-system, such as the transmission of spurious data, will not be able to interfere with normal operation of a complementary subsystem operating on a different channel. In addition, the bi-directionality of the system allows for compensation to occur in the event of a complete path failure somewhere within the loop.”

The past months have seen an influx of published patents for Tesla. Among these include an automatic tire inflation system patent that can pave the way for off-road capabilities for the company’s vehicles, a clever patent that would allow Tesla to address panel gaps during vehicle assembly, a patent that describes colored solar roof tiles, and even a system that uses electric cars as a way to improve vehicle positioning.

Tesla’s recently published patent on its Multi-Channel and Bi-Directional Battery Management System could be accessed in full here.

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Simon is an experienced automotive reporter with a passion for electric cars and clean energy. Fascinated by the world envisioned by Elon Musk, he hopes to make it to Mars (at least as a tourist) someday. For stories or tips--or even to just say a simple hello--send a message to his email, simon@teslarati.com or his handle on X, @ResidentSponge.

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Tesla Full Self-Driving impressions after three weeks of ownership

I will be fair and tell you all what I truly enjoy, as well as what frustrates me about Full Self-Driving.

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Credit: Joey Klender

Tesla Full Self-Driving is amongst the most robust and refined semi-autonomous driver assistance systems on the market today. After three weeks of ownership, I’ve driven around half of my miles using it, and my impressions put me right in the middle of it being very impressive and needing some work.

Of course, if it were perfect, it would be driving us all around all the time while we sleep, scroll our phones, or watch movies in the cockpit. It does a lot of things very well, and it has managed to impress everyone I’ve put in the passenger’s seat.

However, there are some things that are obvious pain points, situations that need improvement, and areas where I believe it has a long way to go. Regardless, these are things I have noticed, and they may differ from your opinions based on your location or traffic situations.

Tesla Model Y ownership two weeks in: what I love and what I don’t

I’ll try to keep it pretty even and just highlight the things that are truly noticeable with Full Self-Driving. I won’t be too critical of the things that it is bad at, and I won’t try to give it too much of a pat on the back.

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I will be fair and tell you all what I truly enjoy, as well as what frustrates me about it.

*Disclaimer: These Full Self-Driving examples were in use with v13.2.9.

Where Tesla Full Self-Driving is Great

Highway Driving

I have yet to have a critical intervention of any kind on the highway. I have driven on easy highways like Rt. 30 in Pennsylvania, and I have driven on congested four-lane parking lots like I-695 near Baltimore, Maryland.

Tesla FSD does a tremendous job on all of it. I usually use the “Hurry” setting of FSD with an offset of between 25 and 40 percent, depending on what I’m doing and where I’m going. Sometimes, I want to push it a bit, and at other times, I’m okay with taking my time and enjoying the drive.

I find the driving style of Hurry is more similar to the traffic around me than the Standard, which tends to drive like an 80-year-old on their way to Bingo.

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It does a great job of being considerate, maintaining an appropriate rate of travel, getting over for cars that are tailgating in the left lane after passing traffic, and it always is where it needs to be when it needs to be there.

Taking the Stress Out of Driving

A few nights ago, I was having some trouble sleeping, and I was up at 3 a.m. I decided it would be a good time to get up, grab a breakfast burrito and a coffee, and head to the Supercharger.

(If you don’t know, I do not have home charging, and I will be diving into EV ownership without that in a future article.)

I let FSD drive me to the Supercharger and back while I was done. I was able to enjoy a beautiful sunrise without having to focus all my attention on the traffic around me, while still maintaining enough attention to the road to keep the driver monitoring happy.

It was really nice. I enjoyed the ride, and it felt like I was in an Uber with a very careful driver while I enjoyed the rest of my coffee and peeked at the sky every few seconds.

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Learning and Improving

A few weeks ago, I approached an “Except Right Turn” stop sign. I have discussed how these are a Pennsylvania specialty, and the first time FSD encountered one in my Model Y, it stopped, even though we were heading right.

I took over, submitted a voice memo to Tesla about it, and went on with my evening. A week later, the car approached the same turn, and, to my surprise, it proceeded through the Stop Sign correctly, safely, and at an appropriate speed.

It was nice to see this improvement, especially since this is one of those regional issues that Tesla will need to address before FSD is fully autonomous. The change even impressed my Fiancé, who was with me during both instances we came upon this turn.

Where Tesla Full Self-Driving Could Be Better

Auto Wipers

Good gravy, these Auto Wipers always seem to give me a good laugh.

They never really have the right speed; they are either way too fast or not fast enough. There’s never been a happy medium.

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It also loves to activate a single wipe of the blade at the strangest times. I’ve noticed that it actually seems to activate at the same spots on the road sometimes. There’s a hanging branch near my house, and every time we go under it and FSD is activated, the wipers wipe once.

It would be nice to set your own intervals for the wipers, but I am okay with the current presets. I do hope the Auto Wipers improve, because it could be one of the best features the car has if it’s more accurate.

It Struggles with Signs That Require Reading

The “Except Right Turn” sign is one example, but another is a “Stop Here on Red” sign that is recessed from an intersection at a stop light if it’s a tighter turn. Recently, I had to slam on the brakes as it was headed straight through one of these signs.

It can recognize Stop Signs and Yield Signs, but signs with instructions for an intersection appear to present a greater challenge for FSD.

Sometimes, It Just Does Things I Don’t Like

There is a four-lane light near my house; the two right lanes go straight, but the lane furthest right is for turning into businesses past the intersection. Some people tend to go in that far right lane, even if they have no intention of turning right into the businesses, and take off quickly from the light to cut ahead.

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I’m not saying it’s illegal or even wrong, but I personally prefer not to do it. I am never in that much of a hurry.

FSD tried to do that the other day; I intervened and kept it in the lane that is designed to go straight. I wouldn’t say this is technically an intervention. I would just say it’s a move I wasn’t super comfortable with because I know people tend to get frustrated with those who cut the line. It’s an etiquette issue, and I didn’t want FSD to do it.

I also am not a huge fan of when there is no traffic in the right lane, yet it continues to cruise in the fast lane. I was taught to drive in the right lane and pass in the left lane. There are states where cruising in the left lane is illegal, and it sometimes tends to stay in the passing lane too long for my liking. I will turn on my right signal and get back into the correct lane.

These are totally disputable, and I am aware of that. Some people might not see a huge issue with these two examples, and I can understand that. My courtesy on the road differs from others, and that’s okay.

All in all, I’m pretty happy with FSD, and I will be continuing my Subscription after the three-month trial ends. In the coming days, I’ll be picking up a camera for FSD videos, and I’ll be able to embed examples of what I mean, as well as share full-length videos of my drive.

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Tesla gets price target increase on Wall Street, but it’s a head-scratcher

Delaney’s price target on Tesla shares went up to $395 from $300. Currently, Tesla is trading between $420 and $430, making the new price target from Goldman Sachs a bit of a head-scratcher.

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Credit: Cybertruck | X

Tesla (NASDAQ: TSLA) received a price target increase from a Wall Street analyst today, who noted in his report that the company’s shares could rise or fall based on its execution in robotics and autonomy.

However, the price target boost still fell below Tesla’s current trading levels.

Mark Delaney of Goldman Sachs said in a note to investors today that Tesla has a significant opportunity to solidify itself as one of the stable and safe plays in the market if it can execute on its two key projects: humanoid robots and autonomy.

In the note, Delaney said:

“If Tesla can have [an] outsized share in areas such as humanoid robotics and autonomy, then there could be upside to our price target.”

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Delaney’s price target on Tesla shares went up to $395 from $300. Currently, Tesla is trading between $420 and $430, making the new price target from Goldman Sachs a bit of a head-scratcher.

He went on to say that Tesla could also confront outside factors that would limit the stock’s ability to see growth, including competition and potentially its own lack of execution:

“…although if competition limits profits (as is happening with the ADAS market in China) or Tesla does not execute well, then there could be downside.”

The note is an interesting one because it seems to point out the blatantly obvious: if Tesla performs well, the stock will rise. If it doesn’t, the stock price will decline.

We discussed yesterday in an article that Tesla is one of the few stocks out there that does not seem to be influenced by financials or anything super concrete. Instead, it is more influenced by the narrative currently surrounding the company, rather than the technicals.

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Tesla called ‘biggest meme stock we’ve ever seen’ by Yale associate dean

Tesla’s prowess in robotics and autonomy is strong. In robotics, it has a very good sentiment following its Optimus project, and it has shown steady improvement with subsequent versions of the robot with each release.

On the autonomy front, Tesla is expanding its Robotaxi platform in Austin every few weeks, and also has a sizeable geofence in the Bay Area. Its Full Self-Driving suite is among the most robust in the world and is incredibly useful and accurate.

The company can gain significant value if it continues to refine the platform and eventually rolls out a driverless or unsupervised version of the Full Self-Driving suite.

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Tesla addresses door handle complaints with simple engineering fix

“We’ll have a really good solution for that. I’m not worried about it.”

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Tesla Model S self-presenting door handle
Tesla Model S self-presenting door handle (Credit: TesBros)

Tesla is going to adjust one heavily scrutinized part of its vehicles after recent government agencies have launched probes into an issue stemming from complaints from owners.

Over the past few days, we have reported on the issues with Tesla’s door handle systems from both the Chinese and American governments.

In China, it dealt with the Model S, while the United States’ National Highway Traffic Safety Administration (NHTSA) reported nine complaints from owners experiencing issues with 2021 Model Ys, as some said they had trouble entering their car after the 12V battery was low on power.

Bloomberg, in an interview with Tesla Chief Designer Franz von Holzhausen, asked whether the company planned to adjust the door handle design to alleviate any concerns that regulatory agencies might have.

Regarding the interior latch concerns in the United States:

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  • Von Holzhausen said that, while a mechanical door release resolves this problem, Tesla plans to “combine the two” to help reduce stress in what he called “panic situations.”
  • He also added that “it’s in the cars now…The idea of combining the electronic and the manual one together in one button, I think, makes a lot of sense.” Franz said the muscle memory of reaching for the same button will be advantageous for children and anyone who is in an emergency.

Regarding the exterior door handle concerns in China:

  • Von Holzhausen said Tesla is reviewing the details of the regulation and confirmed, “We’ll have a really good solution for that. I’m not worried about it.”

The new Model Y already has emergency mechanical door release latches in the back, but combining them in future vehicles seems to be an ideal solution for other vehicles in Tesla’s lineup.

It will likely help Tesla avoid complaints from owners about not having an out in the event of a power outage or accident. It is a small engineering change that could be extremely valuable for future instances.

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