31

Analysis (-Find modules) / Re: Get separate Material IDs from a .g32 file

« on: May 27, 2021, 05:13:28 PM »

Hello Barbara,
first of all welcome to the forum and have a good time here!

You can use our ImportGeo-Base module for that. You can load the .g32 file with it and then you have it in different material IDs. This structure can then save as .gdt file.
Did this answer your question?

32

Digital Battery Development / Re: [GeoDict 2021] Why does the cell capacity not change when I use different c-rates for charging?

« on: May 20, 2021, 02:05:58 PM »

Hallo, first of all welcome here to the forum. Nice to have questions here :)

Let me try to summarize answers here:
1. As in real experiments, the capacity reached by the charging simulation depends on the criterium that stops the time evolution of the battery.
2. For a constant C-rate the most important stopping criteria are:     
    a) Reaching a user-defined final Cell SOC (implemented in BatteryDict2018 as “Battery’s State-ofCharge Range” or “Range of the Cell State of Charge”)   
    b) Reaching a user-defined final cell potential (this will be implemented in BatteryDict 2022)
3. The stopping criterion (b) will result in different reached capacities depending on the user-defined C rate.
4. For any constant C Rate, the stopping criteria (a) will result in the same reached capacity, if the cell potential does not diverge during the simulation.
5. One can reproduce the result of the stopping criterion (b) with the stopping critertion (a) using a certain trick.

The trick I mentioned is:
1. Definition of settings in ChargeBattery for stopping criterium with final cell SOC:
    a) \( SOC_{start} \): User-defined initial cell SOC.
    b) \( SOC_{endt} \): User-defined final cell SOC.
    c) \( C\text{-}rate \): user-defined charge rate.
2. Known from analyzing the battery structure and using the material settings:
    a) \( C_{theo} \): theoretical capacity of the full battery including unconnected active material, see result map in GDR: “Battery:TotalCapacity”
3. By the definition of the cell state of charge, we already know:
    a) \( C_{reached} = | SOC_{end} - SOC_{start} | * C_{theo} \)
4. Additionally, we can determine the time for charging the battery cell:
    a) \( reached\text{ }time = | SOC_{end} - SOC_{start} | * \frac{3600 s}{C\text{-}rate} \)
    b) (Example 1: the C-rate=1 charges 100% of \( C_{theo} \) within one hour (3600 s).
        (Example 2: The C-rate=3 charges 50% of  \( C_{theo} \)  within a sixth of an hour (600 s).
5. We know this without having done any simulation with BatteryDict.
6. This comes directly from the chosen stopping criterion and does not depend on the rest of the algorithm.

Did this answer your question?

33

Forum FAQs / Frequently asked questions:

« on: September 14, 2020, 04:25:08 PM »

Hello everyone welcome to our Forum-FAQs

Why can I not make a post to the forum?

• Only registered members can post to the forum. Here you can register: https://forum.math2market.de/index.php?action=register
• There are certain boards and threats that can only be edited by Math2Market employees. For example this FAQ thread.

   

34

Forum Rules / Forum Rules and Guidelines

« on: September 03, 2020, 04:29:37 PM »

Basic Rules

Flaming: Do not post any messages that harass, insult, belittle, threaten, or flame another member or guest. Debates are fine, but argue with the point, not the person.

Trolling: Do not post with the purpose of starting a dispute. Note that a person disagreeing with your opinion is not considered trolling; keep it civil, even if you are sure that the other person is wrong. Anything seen as trolling will result in you being banned.

Spamming: Posts without content or containing nonsense waste space and everyone's time. Spam will be removed from the forum.

Offensive Posts, Links or Images: Do not use profanity, racial, ethnic, religious, or other slurs or any other offensive material.

Advertising: Posting of advertisements for products or services, links to auctions, affiliate links, links to promote websites, and so forth is not allowed.

Disclosure of Personal Information: Do not disclose any other member's email, real name, address, phone number, IP address, or other personal information. This includes posting contents of emails and private messages without the sender's consent. Do not bring personal disputes into the forums. Bans and warnings issued to other users are considered personal information.

Misleading Titles: The subject line of the post should be as informative as possible about the content of the post. This also reduces the amount of duplicate posts.

Thread Hijacking: Taking a thread off-topic to pursue one's own agenda is not permitted.

Piracy: Do not upload, post, email, transmit, or otherwise make available any content that infringes upon any patent, trademark, trade secret, copyright, or other proprietary rights ("Rights") of any party. This includes GeoDict files created by a forged or illegitimate license.

Honesty: Users must provide truthful information in creating their GeoDict forum account.

These rules are subject to change. The moderators reserve the right to remove, edit, or move posts at their discretion. The GeoDict forum administrators will reserve the right to permanently remove a user account without notice if any of the rules are not followed.

Posting Guidelines

When posting, understand that you are trying to communicate with other people. Although many GeoDict forum members are not fluent in English, the official language of this forum is English.
Here are some important guidelines of language:

• Write in English.
• If you are familiar with LaTeX, please use this to write mathematical equations.
• Always do a quick check for spelling/grammar mistakes.
• Format your post in a legible manner. Use the Preview button often.
• Be concise and articulate as much as possible.
• Use the Enter key to create paragraphs.
• Capitalize correctly. It is difficult to read posts that are written entirely in uppercase or lowercase.
• Use correct punctuation. Avoid run-on sentences.
• Try to avoid using “text speak”, “net speak”, or slang. The purpose of language is to be understood.
• Never invent acronyms and use as few acronyms as possible. For example, write "GeoDict User Meeting" and not "GDUM".
• Review your post before publishing it. Try to catch typos.
• Please check to see if a topic has already been posted. Do not post multiple threads on the same topic.