Document qXR0J7kKVdYNGMkEbRG8dgZM

4J!H1,U>JI mjppL iurn1 wji' mil * mmi' ir^syu i^iwwwmq; n >. *gqqunji" wa-w -,'*!" .*1 LI*22080 ' -' ../ .., , -* --i -~>->i.rfiNiHi-VrJ.-i^i..- 11 mm i i^i.rwr i ii'ir ~ --*-- ------- iftnil'rrirti g"gi IJU* tU2285 fLUjT' ft. i. 4 t * -4- ICKt TEHraUTUIE CKJOIH3 CP IJK10 B^TTERHS 8r Eugeno imilhngant Oould-Kational Butteries* las* ]S Purposet .- i Tho purposo of tho investigation la to develop a prcetioal nouns of chairing lood-acld storage batteries at sub-scre tunporaturos sad at a reasonable rate. Kxporlnontal Workt Previous work on this contract has shorn that tho failure to accept a chargo Is prinorily a failure of lead sulphato to dissolve la the negative plato at a reasonable rate and that this slew solution rato 1 of lead sulphate Is due to the expandor usod to jive good capacity at loir > temperatures. It was found that one oxpunder was canvcrdully available which could give a nuch bettor charge rate than tho material custcnorily usod* but would sacrifice seno low tunperaturo capacity, ^additional cjperinjntal work has new been carried out to show that tho poor chargo rate of the usual cora-rclal expander is duo to lapurltloa In tho caponier end is not due to tho Ingredient rhich gives tho high capacity. If tho 9 expander is emitted froa Who battery entirely* tho charge of tho battery is still very slew due to troubles occurring in tho positive plato end i- j nost of the vark during the post year has been devoted to exploring tho chaalstry of the positive plato. i i Cion the negative plate is first put on charge* it accepts current at a hich rate to produce what appears to bo a layer of oxygon on the surface of tho lead perc6d.de. This Is o rapid reaction* but once this oxygen layer is established* further chargo can occur only at the rato at which this oxygen layer reacts with the dissolved load sulphate. This reaction Is ilcrf and nay bo Halted either by the rato at which load sulphate dissolves or tho Inherent reaction rato between tho oxygen and dissolved load sulphate ct the surfaoe of the lead peroxido. ^s noarly os we can toll* this reaction will not oooept noro than one oapcrc undur cost favorable conditions at JjCty. If tho chargo It cootlnuod for bo t u than c o j aeporo hour* a barrier is set up in the positive plate which Halts the chargo current to an extrtady lor value, j future WorVr Tha nature of this barrier maitlorcd aoero h-s not boon ostab* Hthod* aM further cxporlocntal werk will bo directed tocardt ostabllshinc the nature of this barrlor and possible noons of roaorlng it. r . ; W ' H* k u- Mtnwi I Mill n^--py wwnwifii i up *' ' - .\ i N 1915.01 A*''mwrwvr' iw w iiW IjjWXHj ytm&Bjm**"***^ MI>jy.ff jpiuim^j LIA22081 T mOU I } ; ' t i i 8 - -j * - i ; 8 tjfirtin',^i^Ti ~ - -2- SFECIAL raiFOSE &1ITESIE3 By Harold + Ooold-tfaticnal B^ttcrleJj Zoo* Parpoo*j Tho purpooo of this investigation la the development of baslo doelgn data for high rate discharge "ono--shot" battcrlos, of light weight, using tho load-acid aysten, far oporatlan ovor tbo -65f to /Jjb&T tesperaturo range. E^pcrtajntal TTortci TSd general plan of probloa attack Is to dotcraino optimal conditions for obtaining raaair.ua efficiency fre* oach of tho sovoral battery components. Factors thus far found to rffoet capacity as ooasurod In tores of cepcro-houTf obtalnod per pound of active ratcrial were as follows, ! Positive end nogativo actlra aatorial efficiency ct Mi* discharge rates increases ns grid thlcknoss docrcasos over tho .060 to .020 inch range. 2. Positive and negative active material efficiency at high disehargo rates increases ns pcll.-t size docrcasos. 1 Itva effect of separators upon high discharge rata capacity cay ba analytod cn teals of acid availability lanciiatcly adjacent to th. positive plate. negative plate capacity is little affected iy eeparator geometry car materiel. Futures Experiments in prsgross on acid volume and gravity effects will contlmo. New experimental cast grids jf doslgn indicated V pellet studios will bo vsod to check original work. Itilth-platc cells will be constructed lneerpora.tinc all advantageous features found to determine efficiencies of larger pints groupings. ! ' r nwm \ymtm\mi i niimipyiwiwu^i ..j m ugw N 1915.02  WPWS g^rq--wpwswwi njigyiiuy.i m* ' > ><w LIA22082 ............. ssw r^tM Pfiw i u j is u p i y uMsmaisiisi iUM i'm f'r's n s u n n iw* in . . -3- CKoacu, iRiLmcx met h o d s t c r bat t er t ma t er ia is I$r Howard Knapp Power Source Branch purpocot Tho purpoao of this Investigation 1* the dovslcpoaat of rapid end accurate ncthods for tho chjcsiccl analysis of battery ccoponent material*, koepin* the ample 1m nooejanry for thoao determination* at a ird.rdj3ua trpcrlacntcl TTcrfca Tbo cxporlnontal work has Included analysis of Vanpeneso Dicodds for tho foilwring ooostltucntsi 1, Avcllabln Oxyfoa a. Ferrous .'anaord.ua Sulfate Method b Oxalato Method c. ltdIdo Method d Arsonioos Oxide Method 2 Total Kauganoso 9 a. Vclhard Method b. Blsauthata lathed o Paroulfnts Method 3. Mdsturo Dctcrnlnatloa a. Variation la tlao b. Variatleo In teoperaturo It* pH Dotondnatlra a* Variation la dilation tlno b. Variation la digestion tenporaturs c. Cooling procouurt 5 Iron a* Vdunutrlo b Colorlactrio e* Folarogrephio 6 bond a Oroviwotrio U Colarlaatrle r. Polnrographle aariau fnj^ij n 4.pi u u iii|i ipri lire **r N 1915.03 W m 111 - 'jr"' ............................. ... LIA22083 -t- futuroi It 1* plamod to extend this Investigation to lndudot 1* Traoo lnpurltlos In Vnngsnoso Dioxide 2. Analysis cf other battery materials such as Carbon Blochs, Silver, Load, Nickel, Zinc, Wajnosiua, thoir cenponcat* and alleys. 3. Battery electrolytes such as Sulfuric Add, Sodlua lydrojtldo, Potasslua Qjrdraxldo and ethers. 0 i j j *w i 1H1 u> 1 UT^2208A Ua~ .......---------------------------------------------------------------------------------^**- ^-> -. A^*--~*^- ~ -tl hl f' riM l l Il Other paper* presented at th Conference were ai follows t SCEL MnO? Progran .................................. .Ur. Charles fl, Clark, Poser Sources Branch Electrolytic Manganese trlad.de. ..... .Ur. Emost A. Plater Tennessee Corporation Manganese Dioxide . ........... .Ur. Lloyd Bcrf Montana State College Manganese Dioxide ...... .Ur. Joseph C. Schraanher Western Electrocheoical Coopery The Kagnesiua Dry Cell. .. .Hr. Arthur P. Daniel power Sources Branch The Uagncsiua Dry Cell. ......... ,!lr. Roy C. IClrk Dos Q-.eoical Coopery Battery Separator Haterials ....... .Hr. John J. Murphy rower Sources Broach Low Tmoereture Batteries ........ .Hr. Alfred B. Garrett " Ohio State Dniyerolty Low Teapcrature Batteries ........ .Hr. jilllard P. 0111 Oiln Industries, Inc. 9 Low Temperature Batteries .Ur. Albort F. VAnal Uidon Ccrtd.de and Carbon Carp. Law Temperature Batteries ........ .Ur. Thecas C. O'Baa ` P. K. tallnry A Co., Inc. Miniature Dry Cells ......................... .... .Hr. Paul Jltrsal ` Onion Carbide and Carbon Ccrp. Miniature Dry Cells ........... .Ur. R. E. Ralston ' P. R. Mallory A Co., Inc. Alkaline Lry Cell Batteries .. .Ur. TTiiliaa Shorr Power Sojrces Branch Special Purpose Batteries ........ .?tr. Kicholaa T. Wilburn Poser Sources Branch Special Purpose Batteries ... .la*. Johan Block*tea ' '" 7" BJ arkaten Rsaaarch Laboratories m } 9 ***?* wry N 1915.04