Hello everyone,
I have 5 Samsung 21700 - 50 E (NCM chemistry) cells. I want to do basic charge and discharge by connecting it in series. Does anyone know if there is a cell holder available online for single cells? Or how to connect these cells and make contact?
Thanks in advance
Dear Praveen Kumar Kuppusamy ,
also, some available[1,2], good (3x plus 2x, 21700[1]) battery safety spacer(s)[2] might add on value(s) in your project, since they increase
1) the reliability specs (for mechanical, heat, etc.),
as well as
2) critical measures of dispersion for (Samsung 21700 - 50E) cells' statistics,
in case(s) of massive tests in your R&D.
1. 3x or 2x 21700 battery Spacer Frame Radiating Holder Hole D21.65 Plastic Bracket
https://www.ebay.com.au/itm/3x-or-2x-21700-battery-Spacer-Frame-Radiating-Holder-Hole-D21-65-Plastic-Bracket/123308883472?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20160323102634%26meid%3D4f03083dff2f4c7e9320f584e5acd010%26pid%3D100623%26rk%3D2%26rkt%3D5%26sd%3D273436780531%26itm%3D123308883472%26pmt%3D1%26noa%3D1%26pg%3D2047675%26algv%3DDefaultOrganic%26brand%3DUnbranded&_trksid=p2047675.c100623.m-1
2. Battery Safety Spacer Radiating Shell Plastic Heat Holder Bracket https://www.ebay.com.au/itm/20Pcs-3x-Battery-Safety-Spacer-Radiating-Shell-Plastic-Heat-Holder-Bracket/291860473103?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20200520130048%26meid%3Db089d14180174d1a9dd4734eefe9b5a1%26pid%3D100005%26rk%3D6%26rkt%3D12%26mehot%3Dco%26sd%3D123308883472%26itm%3D291860473103%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv5PairwiseWebWithDarwoV3BBEV2b%26brand%3DUnbranded&_trksid=p2047675.c100005.m1851
Also, weld[1,2] two, independent, wires on each (-,+, terminal of a) battery[2,3], one (1st) wire for i, and one (2nd) wire for V.
1. a) or even solder, if a(ny) welding technique is not available, in the Lab.
b) Also, ultrasonic (and other[1c]) welding matter, in: Ultrasonic Metal Welding for Lithium-Ion Battery Cells https://ewi.org/ultrasonic-metal-welding-for-lithium-ion-battery-cells-2/
c) Welding methods for electrical connections in battery systems https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiA67H-k77sAhUpDWMBHcnhAnIQFjABegQIAxAC&url=https%3A%2F%2Fuu.diva-portal.org%2Fsmash%2Fget%2Fdiva2%3A1326174%2FFULLTEXT01.pdf&usg=AOvVaw2EsvALVaLjFPHhnoeSesC9
2. Welding techniques for battery cells and resulting electrical contact resistances https://www.researchgate.net/publication/277950873_Welding_techniques_for_battery_cells_and_resulting_electrical_contact_resistances
3. Tailoring micro resistance spot welding parameters for joining nickel tab to inner aluminium casing in a cylindrical lithium ion cell and its influence on the electrochemical performance https://www.sciencedirect.com/science/article/pii/S1526612519304347
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