Differences

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--- batteries [2018-11-23 18:04] – [Reference Material] alfie
+++ batteries [2024-06-26 23:12] (current) – [Rules] danshearer
@@ Line 1: / Line 1: @@
 ====== Rechargeable Batteries in the Hacklab ======
-As large, high-energy batteries become more widely available at low cost, we see more and more in the lab. This is good! They are an ideal energy source for many projects. However, like any large energy source, they must be treated with respect; mistreatment of high-energy rechargeable batteries can go very wrong, very quickly.
-**DO NOT leave charging batteries unattended. Ever. Full stop.**
+===== Rules =====
-Rules for using Lithium-based batteries in the lab:
-  * Storage:
-    * Batteries must be stored safely in the designated storage box.
-    * The terminals must be covered to prevent accidental shorting.
   * Charging:
-    * Single cells may be charged using simple constant-current and constant-voltage settings.
+    * **DO NOT** leave charging batteries unattended.
+    * **DO NOT** charge cells/batteries in parallel without balancing circuit
     * Multi-cell batteries must be charged using a proper balancing circuit.
-    * Batteries/cells must not be charged in parallel without additional monitoring.
+    * Charging only in the battery charging area in G1.
-    * All lithium charging must be supervised.
+    * Single cells may be charged using simple constant current and constant voltage.
+    * Battery charging must be contained within an appropriate fireproof battery charging bag.
+      * Hacklab owns one such bag, kept in the battery charging area or the battery storage box.
+      * If you wish to provide your own safety bag, it must be approved by Hacklab.
+  * Storage:
+    * Batteries must be stored safely in the designated storage box in G14, on the shelves nearest the window.
+    * The terminals must be covered to prevent accidental shorting.
+===== Reclaimed/Recovered Batteries =====
+//todo: Safety reccomendations for recovered batteries such as the hoverboard 18650 packs.//
+  * Safely dismantle and inspect
+  * Check individual cell voltages
+  * Look for parallel-wired cells
+  * If internal balancer circuit is not trustworthy, replace with external balance connector
 ===== Risk assessment =====
@@ Line 24: / Line 34: @@
 ^ Risk ^ Mitigation ^
+| Battery Fire | Charging will always occur in suitable fire/heatproof containers |
 | Over-charging | Charging will always be supervised. Users will apply appropriate voltage/current limits according to battery. |
 | Individual cells may be overcharged when connected in series | Balancing circuit will always be used. |
@@ Line 37: / Line 48: @@
 Tim Kerby suggested [[https://www.riscauthority.co.uk//index.cfm?originalUrl=utilities/download.html&fid=32025C47-9026-4ADB-BE9D84AA53E31014|this RISCAuthority writeup (PDF)]] as a basis for our Risk Assessment.
-[[http://www.hse.gov.uk/pubns/indg139.pdf|Using electric storage batteries safely]], a publication from the HSE.
+[[http://www.hse.gov.uk/pubns/indg139.pdf|Using electric storage batteries safely (PDF)]], a publication from the HSE.