Lithium-ion Battery Pack v25.11

Lithium-ion_Battery_Pack_v25.11 Short description Specifications Product Ecology What other GVCS tools does this use? License OSHWA and OSI compliant. CC-BY-SA-4.0 International, GPLv3, DIN SPEC 3105. Module 1 Describe features of Module 1 Module 2 Describe features of Module 2 Key Specification Key spec data point Construction Describe basic construction technique and materials Productivity Describe how this relates to industrial productivity on a small scale Completion Status Describe whether built, prototyped, etc. Link to relevant Genealogy and Status of Completion. Do you want more of this? Get Involved

Development

Development Template

	Description	Link to Work Product	%
	DESIGN
1	Requirements + Value Proposition	Lithium-ion_Battery_Pack_v25.11 Requirements + Value Proposition	0
2	Industry_Standards	Lithium-ion_Battery_Pack_v25.11 Industry Standards	0
3	Conceptual Design	Lithium-ion_Battery_Pack_v25.11 Conceptual Design	0
4	Module Breakdown	Lithium-ion_Battery_Pack_v25.11 Module Breakdown	0
5	Design Guide	Lithium-ion_Battery_Pack_v25.11 Design Guide	0
	TECHNICAL DESIGN
6	3D CAD	Lithium-ion_Battery_Pack_v25.11 3D CAD	0
7	Calculations	Lithium-ion_Battery_Pack_v25.11 Calculations	0
8	Electronics Design	Lithium-ion_Battery_Pack_v25.11 Electronics Design	0
9	Wiring and Plumbing	Lithium-ion_Battery_Pack_v25.11 Wiring and Plumbing	0
10	Software	Lithium-ion_Battery_Pack_v25.11 Software	0
	BILL OF MATERIALS
11	BOM	Lithium-ion_Battery_Pack_v25.11 BOM	0
12	vBOM	Lithium-ion_Battery_Pack_v25.11 vBOM	0
13	CAM Files	Lithium-ion_Battery_Pack_v25.11 CAM Files	0
14	Cut List	Lithium-ion_Battery_Pack_v25.11 Cut List	0
	BUILD
15	Build Instructions	Lithium-ion_Battery_Pack_v25.11 Build Instructions	0
16	Fabrication Drawings	Lithium-ion_Battery_Pack_v25.11 Fabrication Drawings	0
17	Exploded Part Diagram	Lithium-ion_Battery_Pack_v25.11 Exploded Part Diagram	0
18	Production Engineering	Lithium-ion_Battery_Pack_v25.11 Production Engineering	0
	LIFECYCLE DESIGN
19	Build Pictures and Video	Lithium-ion_Battery_Pack_v25.11 Build Pictures and Video	0
20	Data Collection	Lithium-ion_Battery_Pack_v25.11 Data Collection	0
21	Future Work	Lithium-ion_Battery_Pack_v25.11 Future Work	0
22	Troubleshooting and Repair	Lithium-ion_Battery_Pack_v25.11 Troubleshooting and Repair	0

Design status

The next thing I will research is different types of connectors/contacts for making electrical connections between the cells. Goal is to make the joining of cells simple and secure.

The recommended method to join 18650 cells is spot-welding, but that has some significant drawbacks in the OSE context. Expensive equipment is barrier to entry. Welding/soldering reduces repairability.

One of the other pages on the wiki had a requirement to use spring loaded contacts, but that was not recommended in [DIY book ref] since the contacts have high resistance. Depends on the specific mechanism I suppose.

An option might be to not go for the 18650 but go for prismatic cells with threaded connectors instead. How is the availability/cost/specs compared to the 18650s?