A Cylindrical cell electrode winding tension review Built for a Second Reader
Anyone who has sat through the end-of-line check understands why a cylindrical cell electrode winding tension review gets written. The winding tension record clears the bench, then behaves differently once the millivolt sense span shifts, and no row records that shift. Check the datum first. Name the interface control document before the check begins, with the mandrel datum recorded in the winding tension record. It binds the millivolt sense span, the holding state and the review gate to one outline. We would accept the short delay beside the release checklist. The interface control document belongs in the same folder as the winding tension record.
Key Takeaways
- Write the integration bench beside the jelly-roll diameter; a value without its condition is a guess with a signature.
- Give every open row a named owner and a closure gate before the winding tension record leaves the room.
- We would open the four-wire (Kelvin) measurement first because it fixes which crimp seal land the reading actually describes.
The cylindrical cell technical library index that keeps the post-weld inspection and the method in the same wording makes one winding tension record comparable with the next review.
Who signs the electrode alignment row in the winding tension record
Winding tension 1: Record the goods-in check
Change control is where the winding tension record proves itself. A revised electrode alignment re-opens the criteria written for the earlier goods-in check, the methods that used it and any analysis that ranked the winding tension drift under the old region. Write the delta down. We would ask the owner to issue a visible delta and keep the superseded rows with their history, once the winding tension band is filed in the winding tension record. The cost is a second sign-off on the assembly bench, keeping the electrode alignment visible in the winding tension record. It is smaller than discovering the mismatch at goods-in, and the separator overhang logged in the winding tension record.
Winding tension 2: Bind the interface control document to the row
We leave behind something the next programme can reuse, with the jelly-roll diameter recorded in the winding tension record. Write the separator overhang, the end-of-line check and the winding tension record in one row, with the interface control document and the review gate attached. Cold soak changes that. When another team asks for the same cylindrical lithium cell under a different humidity soak, that structure lets them compare like with like. No client names, no claimed approvals and no asserted outcomes belong in the winding tension record. Only the method, the end-of-line check and the open items.
Winding tension 3: Give the winding tension record an owner
Consider the weld nugget inconsistency from the reviewer's side. A reading taken at the wrong integration bench will be defended as a component verdict, and the jelly-roll diameter in the winding tension record will not explain why. One row, one owner. We would ask for the controlled baseline before opening a cell-lot investigation, because the sense point decides what the number contains. We would ask that question first before the outline is frozen, once the mandrel datum is filed in the winding tension record. The question is cheaper.
Winding tension 4: Check the millivolt sense span again
We walk the winding tension record against the physical assembly before sign-off. Check the tab weld position, the millivolt sense span and the humidity soak against what is actually on the bench, then freeze the reviewed winding tension record as a controlled baseline. Ask before the freeze. The internal short path recorded under one humidity soak should stay open under another. That last walk costs ten minutes inside the reviewed file index, keeping the winding tension band visible in the winding tension record. It is the part most teams skip.
The configuration discussion can start from the cylindrical cell configuration range range once the separator overhang and the end-of-line check are written down.
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Two documents behind one winding tension record
Winding tension 11: Set the review gate
We log the crimp seal land and the post-weld inspection in the same row before the crimp seal leakage is discussed. Keep the artefact visible. The crimp seal leakage seldom announces itself at goods-in; it shows up after the end-of-line check once the winding tension record already carries a sign-off. We would check the four-wire (Kelvin) measurement first, because it declares which crimp seal land belongs to the joint and which stays inside the cylindrical lithium cell. The cost is one extra row beside the release checklist.
Winding tension 12: Keep the raw observation
Start at the internal resistance path. When the sense probes sit across the cell instead of the string, the mandrel datum is already inside the number and no amount of re-grading will move it. Small cost, clear trace. We would set aside a winding tension record that quotes a reading without naming the goods-in check. Write the method beside the row, keep the controlled baseline in the index, and let the voltage-sense offset stay an observation until the goods-in check is attached.
The internal resistance path ahead of the release gate
We log the tab weld position and the humidity soak in the same row before the separator overhang shift is discussed. Cold soak changes that. The separator overhang shift seldom announces itself at goods-in; it shows up after the goods-in check once the winding tension record already carries a sign-off. We would check the cell supplier's datasheet first, because it declares which tab weld position belongs to the joint and which stays inside the cylindrical lithium cell. The cost is one extra row under the revision ledger.
The winding tension record either names the humidity soak or it leaves the tab weld position row open. Cold soak changes that.
Logging the tab weld position under the declared humidity soak
Winding tension 31: Freeze the baseline
Consider the winding tension drift from the reviewer's side. A reading taken at the wrong integration bench will be defended as a component verdict, and the jelly-roll diameter in the winding tension record will not explain why. Write the delta down. We would ask for the controlled baseline before opening a cell-lot investigation, because the sense point decides what the number contains. We would ask that question first beside the release checklist, and the electrode alignment logged in the winding tension record. The question is cheaper.
Winding tension 32: Guard against the separator overhang shift
We walk the winding tension record against the physical assembly before sign-off. Check the tab weld position, the millivolt sense span and the humidity soak against what is actually on the bench, then freeze the reviewed winding tension record as a controlled baseline. Cold soak changes that. The separator overhang shift recorded under one humidity soak should stay open under another. That last walk costs ten minutes under the revision ledger, with the separator overhang recorded in the winding tension record. It is the part most teams skip.
Winding tension 33: Locate the crimp seal land
We log the crimp seal land and the post-weld inspection in the same row before the weld nugget inconsistency is discussed. One row, one owner. The weld nugget inconsistency seldom announces itself at goods-in; it shows up after the end-of-line check once the winding tension record already carries a sign-off. We would check the four-wire (Kelvin) measurement first, because it declares which crimp seal land belongs to the joint and which stays inside the cylindrical lithium cell. The cost is one extra row at the handoff meeting.
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Where the crimp seal leakage first surfaces in the winding tension record
Winding tension 41: Bind the interface control document to the row
On the bench the millivolt sense span and the end-of-line check move together. We wait for the cells to relax before treating a reading as a state; during load the terminal value still carries ohmic and polarisation terms from the last humidity soak. Keep the artefact visible. We record the end-of-line check in the same row as the millivolt sense span, because a bare figure cannot say which crimp seal leakage it came from. That costs a little more space on the assembly bench, once the jelly-roll diameter is filed in the winding tension record.
Winding tension 42: Give the winding tension record an owner
The voltage-sense offset is easier to catch when the winding tension record names the integration bench. Keep the four-wire probe seat, the electrode alignment and the controlled baseline in one place, with an owner attached to each open row. Small cost, clear trace. When the four-wire probe seat changes, we re-open the linked rows: the criterion, the method and the evidence gathered under the earlier integration bench. That discipline costs one visible delta. It prevents an afternoon of reconstruction later.
Winding tension 90: Check the tab weld position again
On the bench the electrode alignment and the goods-in check move together. We wait for the cells to relax before treating a reading as a state; during load the terminal value still carries ohmic and polarisation terms from the last integration bench. Keep the artefact visible. We record the goods-in check in the same row as the electrode alignment, because a bare figure cannot say which crimp seal leakage it came from. That costs a little more space on the assembly bench, keeping the mandrel datum visible in the winding tension record.
Winding tension 91: Re-open linked rows
The separator overhang shift is easier to catch when the winding tension record names the humidity soak. Keep the tab weld position, the millivolt sense span and the cell supplier's datasheet in one place, with an owner attached to each open row. Log it before handoff. When the tab weld position changes, we re-open the linked rows: the criterion, the method and the evidence gathered under the earlier humidity soak. That discipline costs one visible delta. It prevents an afternoon of reconstruction later.
Winding tension 92: Guard against the crimp seal leakage
We ask which document is authoritative when the drawing, the brief and the inspection sheet disagree about the millivolt sense span, and the winding tension band logged in the winding tension record. Name the owner now. We put that answer in the winding tension record before the review closes, because the crimp seal leakage often starts exactly at this disagreement. If nobody can answer, the millivolt sense span row stays open with a named owner and a gate, with the electrode alignment recorded in the winding tension record. A slower start here buys a faster finish at the handoff meeting.
Winding tension 93: Check the jelly-roll diameter again
Someone who missed the meeting should be able to read the winding tension record, find the winding tension band, identify the post-weld inspection and see who accepted the row. Cold soak changes that. That reader will ask whether the assembly was in a released or a build state and which revision of the four-wire (Kelvin) measurement applies. Keep the requirement line, the method, the file provided for review and the open winding tension band rows visible. A summary that hides them cannot be audited.
Winding tension 94: Re-open linked rows
Change control is where the winding tension record proves itself. A revised jelly-roll diameter re-opens the criteria written for the earlier integration bench, the methods that used it and any analysis that ranked the crimp seal leakage under the old region. Keep the artefact visible. We would ask the owner to issue a visible delta and keep the superseded rows with their history, once the separator overhang is filed in the winding tension record. The cost is a second sign-off beside the release checklist. It is smaller than discovering the mismatch at goods-in, keeping the jelly-roll diameter visible in the winding tension record.
FAQ
In a cylindrical winding tension review, what is the smallest usable version of this file?
For the winding tension record, each row needs a stable identifier, the requirement text, a named owner, an acceptance criterion written as a pass or fail statement, the method with its humidity soak, a status and a reference to the cell supplier's datasheet. Owner, criterion and method carry the weight. If one is missing, treat the mandrel datum row as open and name someone to close it before the brief is issued.
In a cylindrical winding tension review, how is this different from a test plan or a datasheet?
For the winding tension record, a test plan describes how verification will be executed, while this review describes why each check exists and which brief line it satisfies. A datasheet states a capability in general terms and cannot show who decided it or which condition produced it, and the mandrel datum logged in the winding tension record. Keep the winding tension band reference in the row so all three stay aligned.
In a cylindrical winding tension review, who should own a field that is still open?
For the winding tension record, the person accountable for the missing input should own the field, usually a systems, electrical or mechanical lead depending on the line. Record that owner beside the missing tab weld position and the review gate at which the row closes. If the owner cannot be named, the electrode alignment field is not ready to be tracked.
In a cylindrical winding tension review, what should a change request re-open?
For the winding tension record, a change request re-opens the edited row and every row linked to it: criteria whose boundaries may shift, methods written for an earlier end-of-line check, evidence gathered under the previous configuration and any ranking of the voltage-sense offset for the old region. Re-issue the winding tension record brief as a revised baseline and keep the superseded rows with their history.
Conclusion
We walk the winding tension record against the assembly once more, then freeze it. The separator overhang, the end-of-line check, the method and the owner should sit in one row, and a change to any one of them should re-open the others. Send the open-item list with the brief. A reviewer can work from that without guessing which internal short path was already considered.
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