{"id":19620,"date":"2023-12-28T02:49:33","date_gmt":"2023-12-28T02:49:33","guid":{"rendered":"http:\/\/dgbellvietnam.com\/lithium-ion-battery-nail-penetration-test-2\/"},"modified":"2024-10-21T14:49:10","modified_gmt":"2024-10-21T07:49:10","slug":"lithium-ion-battery-nail-penetration-test-2","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/lithium-ion-battery-nail-penetration-test-2\/","title":{"rendered":"Th\u1eed nghi\u1ec7m \u0111\u00e2m xuy\u00ean pin Lithium-ion"},"content":{"rendered":"
\n
\n

Pin lithium ion \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng, thi\u1ebft b\u1ecb khoa h\u1ecdc, ph\u01b0\u01a1ng ti\u1ec7n v\u1eadn chuy\u1ec3n kh\u00f4ng gian v\u00e0 h\u1ec7 th\u1ed1ng v\u1ec7 tinh do \u0111i\u1ec7n \u00e1p pin v\u00e0 n\u0103ng l\u01b0\u1ee3ng ri\u00eang cao, ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng r\u1ed9ng, tu\u1ed5i th\u1ecd l\u01b0u tr\u1eef d\u00e0i, kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng v\u00e0 kh\u00f4ng c\u00f3 hi\u1ec7u \u1ee9ng b\u1ed9 nh\u1edb. Tuy nhi\u00ean, n\u1ebfu pin lithium-ion g\u1eb7p ph\u1ea3i hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong, \u0111o\u1ea3n m\u1ea1ch b\u00ean ngo\u00e0i, s\u1ea1c qu\u00e1 m\u1ee9c ho\u1eb7c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao, nhi\u1ec7t Joule v\u00e0 nhi\u1ec7t ph\u1ea3n \u1ee9ng b\u00ean trong pin s\u1ebd t\u0103ng m\u1ea1nh, d\u1eabn \u0111\u1ebfn c\u00e1c s\u1ef1 ki\u1ec7n nguy hi\u1ec3m th\u1ea3m kh\u1ed1c nh\u01b0 n\u1ed5, h\u1ecfa ho\u1ea1n v\u00e0 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t.<\/span><\/p>\n

\u0110\u1ec3 ki\u1ec3m tra hi\u1ec7u su\u1ea5t an to\u00e0n c\u1ee7a pin lithium-ion, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 li\u00ean quan nh\u01b0 Writers Laboratories Japan Battery Association (JBA) v\u00e0 Chinese National Standards (GB) \u0111\u00e3 li\u00ean ti\u1ebfp ph\u00e1t tri\u1ec3n c\u00e1c ti\u00eau chu\u1ea9n ki\u1ec3m tra an to\u00e0n pin lithium-ion. C\u00e1c h\u1ea1ng m\u1ee5c ki\u1ec3m tra an to\u00e0n th\u01b0\u1eddng d\u00f9ng hi\u1ec7n nay bao g\u1ed3m b\u1ed1n kh\u00eda c\u1ea1nh: hi\u1ec7u su\u1ea5t nhi\u1ec7t, hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc, hi\u1ec7u su\u1ea5t \u0111i\u1ec7n v\u00e0 c\u00e1c h\u1ea1ng m\u1ee5c ki\u1ec3m tra kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/span><\/p>\n

Th\u1eed nghi\u1ec7m \u0111\u00e2m xuy\u00ean<\/span><\/a> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ecnh tr\u1ea1ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong pin lithium-ion do l\u1eafng \u0111\u1ecdng lithium, l\u1ed7i s\u1ea3n xu\u1ea5t ho\u1eb7c c\u00e1c l\u00fd do kh\u00e1c, ho\u1eb7c t\u00ecnh tr\u1ea1ng v\u1eadt th\u1ec3 gi\u1ed1ng nh\u01b0 kim \u0111\u00e2m th\u1ee7ng pin lithium-ion.<\/span><\/p>\n

Hi\u1ec7n nay, c\u00f3 nh\u1eefng v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u01a1 ch\u1ebf kh\u00f4ng r\u00f5 r\u00e0ng v\u00e0 kh\u1ea3 n\u0103ng l\u1eb7p l\u1ea1i k\u00e9m trong c\u00e1c tai n\u1ea1n an to\u00e0n do \u0111inh \u0111\u00e2m xuy\u00ean. C\u1ea3i thi\u1ec7n thi\u1ebft k\u1ebf pin l\u00e0 m\u1ed9t h\u01b0\u1edbng quan tr\u1ecdng \u0111\u1ec3 n\u00e2ng cao t\u00ednh an to\u00e0n c\u1ee7a pin lithium-ion th\u00f4ng qua vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e2n t\u00edch c\u01a1 ch\u1ebf v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t trong qu\u00e1 tr\u00ecnh \u0111inh \u0111\u00e2m xuy\u00ean pin. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd ph\u00e2n t\u00edch v\u00e0 t\u00f3m t\u1eaft t\u00ecnh h\u00ecnh ng\u1eafn m\u1ea1ch b\u00ean trong trong \u0111i\u1ec1u ki\u1ec7n \u0111inh \u0111\u00e2m xuy\u00ean, gi\u1edbi thi\u1ec7u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u hi\u1ec7n c\u00f3 v\u1ec1 th\u00ed nghi\u1ec7m \u0111inh \u0111\u00e2m xuy\u00ean, ph\u00e2n t\u00edch c\u00e1c \u01b0u \u0111i\u1ec3m t\u01b0\u01a1ng \u1ee9ng c\u1ee7a ch\u00fang v\u00e0 cu\u1ed1i c\u00f9ng \u0111\u1ec1 xu\u1ea5t c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 c\u1ea3i thi\u1ec7n m\u00f4 h\u00ecnh \u0111inh \u0111\u00e2m xuy\u00ean cho b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh \u0111inh \u0111\u00e2m xuy\u00ean pin lithium-ion ch\u00ednh x\u00e1c l\u00e0m t\u00e0i li\u1ec7u tham kh\u1ea3o.<\/span><\/p>\n

1 Th\u1eed nghi\u1ec7m an to\u00e0n \u0111\u00e2m xuy\u00ean<\/a> pin lithium ion<\/span><\/strong><\/span><\/h1>\n

Th\u1eed nghi\u1ec7m \u0111\u00e2m \u0111inh \u0111\u1ed1i v\u1edbi pin lithium-ion \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng kim th\u00e9p ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao \u03c6 5~ \u03c6 8 mm (v\u1edbi g\u00f3c \u0111\u1ea7u kim l\u00e0 60 \u00b0 v\u00e0 b\u1ec1 m\u1eb7t nh\u1eb5n kh\u00f4ng c\u00f3 r\u1ec9 s\u00e9t, l\u1edbp oxit v\u00e0 v\u1ebft d\u1ea7u) n\u00ean \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o v\u1edbi t\u1ed1c \u0111\u1ed9 (25 \u00b1 5) mm\/gi\u00e2y theo h\u01b0\u1edbng vu\u00f4ng g\u00f3c v\u1edbi t\u1ea5m \u0111i\u1ec7n c\u1ef1c c\u1ee7a pin v\u00e0 v\u1ecb tr\u00ed \u0111\u00e2m \u0111inh ph\u1ea3i g\u1ea7n v\u1edbi t\u00e2m h\u00ecnh h\u1ecdc c\u1ee7a b\u1ec1 m\u1eb7t \u0111\u00e2m \u0111inh (kim th\u00e9p n\u1eb1m trong pin). C\u1ea7n k\u00edch ho\u1ea1t v\u00e0 quan s\u00e1t hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong pin m\u1ed9t c\u00e1ch nh\u00e2n t\u1ea1o trong m\u1ed9t kho\u1ea3ng th\u1eddi gian. Th\u1eed nghi\u1ec7m \u0111\u00e2m \u0111inh \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 1. N\u1ebfu pin kh\u00f4ng b\u1eaft l\u1eeda, kh\u00f4ng b\u1ed1c kh\u00f3i ho\u1eb7c kh\u00f4ng ph\u00e1t n\u1ed5, pin s\u1ebd v\u01b0\u1ee3t qua th\u1eed nghi\u1ec7m \u0111\u00e2m \u0111inh. N\u1ebfu kh\u00f4ng, pin s\u1ebd kh\u00f4ng v\u01b0\u1ee3t qua. Th\u00ed nghi\u1ec7m \u0111\u00e2m \u0111inh ch\u1ee7 y\u1ebfu nghi\u00ean c\u1ee9u t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1ed1c \u0111\u1ed9 \u0111\u00e2m \u0111inh, v\u1ecb tr\u00ed \u0111\u00e2m \u0111inh, tr\u1ea1ng th\u00e1i s\u1ea1c, dung l\u01b0\u1ee3ng pin, v.v. \u0111\u1ed1i v\u1edbi s\u1ef1 an to\u00e0n c\u1ee7a pin.<\/span><\/p>\n

Trong qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh v\u00e0o pin lithium-ion, hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong c\u00f3 th\u1ec3 x\u1ea3y ra trong b\u1ed1n t\u00ecnh hu\u1ed1ng kh\u00e1c nhau<\/span><\/p>\n

(1) Hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong x\u1ea3y ra gi\u1eefa c\u00e1c c\u1ef1c thu d\u00f2ng \u0111i\u1ec7n d\u01b0\u01a1ng v\u00e0 \u00e2m (l\u00e1 nh\u00f4m v\u00e0 l\u00e1 \u0111\u1ed3ng)<\/span><\/p>\n

(2) X\u1ea3y ra gi\u1eefa l\u00e1 nh\u00f4m v\u00e0 \u0111i\u1ec7n c\u1ef1c \u00e2m<\/span><\/p>\n

(3) X\u1ea3y ra gi\u1eefa \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u0111i\u1ec7n c\u1ef1c \u00e2m<\/span><\/p>\n

(4) N\u00f3 x\u1ea3y ra gi\u1eefa l\u00e1 \u0111\u1ed3ng v\u00e0 c\u1ed5ng \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng.<\/span><\/p>\n

M\u1eb7t kh\u00e1c, trong qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh v\u00e0o pin lithium-ion, th\u01b0\u1eddng x\u1ea3y ra nhi\u1ec1u lo\u1ea1i ng\u1eafn m\u1ea1ch b\u00ean trong, v\u00e0 t\u00ecnh tr\u1ea1ng ng\u1eafn m\u1ea1ch b\u00ean trong c\u0169ng s\u1ebd ph\u00e1t tri\u1ec3n theo th\u1eddi gian. \u0110\u00e2y l\u00e0 l\u00fd do c\u01a1 b\u1ea3n khi\u1ebfn c\u01a1 ch\u1ebf ng\u1eafn m\u1ea1ch b\u00ean trong kh\u00f4ng r\u00f5 r\u00e0ng v\u00e0 kh\u1ea3 n\u0103ng l\u1eb7p l\u1ea1i k\u00e9m trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m \u0111\u00e2m \u0111inh v\u00e0o pin lithium-ion.<\/span><\/p>\n

Theo hi\u1ec3u bi\u1ebft hi\u1ec7n t\u1ea1i, qu\u00e1 tr\u00ecnh c\u01a1 b\u1ea3n c\u1ee7a qu\u00e1 tr\u00ecnh ng\u1eafn m\u1ea1ch b\u00ean trong do pin lithium-ion g\u00e2y ra trong qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh nh\u01b0 sau: \u0110\u1ea7u ti\u00ean, nhi\u1ec7t Joule do ng\u1eafn m\u1ea1ch b\u00ean trong t\u1ea1o ra khi\u1ebfn nhi\u1ec7t \u0111\u1ed9 c\u1ee5c b\u1ed9 c\u1ee7a pin t\u0103ng nhanh. Sau khi nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea1t \u0111\u1ebfn m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1ecbnh, n\u00f3 s\u1ebd g\u00e2y ra s\u1ef1 ph\u00e2n h\u1ee7y c\u1ee7a m\u00e0ng SEI (80-120 \u2103) \u200b\u200bv\u00e0 s\u1ef1 tan ch\u1ea3y c\u1ee7a m\u00e0ng (165 \u2103). S\u1ef1 ph\u00e2n h\u1ee7y c\u1ee7a m\u00e0ng SEI v\u00e0 s\u1ef1 tan ch\u1ea3y c\u1ee7a m\u00e0ng t\u1ea1o ra nhi\u1ec1u nhi\u1ec7t h\u01a1n, th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y ch\u1ea5t \u0111i\u1ec7n ph\u00e2n (130-300 \u2103) v\u00e0 ph\u1ea3n \u1ee9ng kh\u1eed \u0111i\u1ec7n c\u1ef1c \u00e2m (100-400 \u2103), trong khi ph\u1ea3n \u1ee9ng oxy h\u00f3a \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng (160-400 \u2103) cu\u1ed1i c\u00f9ng d\u1eabn \u0111\u1ebfn qu\u00e1 tr\u00ecnh gia nhi\u1ec7t kh\u00f4ng ki\u1ec3m so\u00e1t.<\/span><\/p>\n

C\u00e1c th\u00f4ng s\u1ed1 c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra trong th\u1eed nghi\u1ec7m an to\u00e0n \u0111\u00e2m xuy\u00ean c\u1ee7a \u0111inh bao g\u1ed3m<\/span><\/p>\n

(1) Nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau c\u1ee7a pin lithium-ion trong qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh<\/span><\/p>\n

(2) Thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p trong pin lithium-ion trong qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh<\/span><\/p>\n

(3) T\u1ed1c \u0111\u1ed9 t\u1ef1 gia nhi\u1ec7t, nhi\u1ec7t \u0111\u1ed9 tho\u00e1t nhi\u1ec7t ban \u0111\u1ea7u, m\u1ee9c \u0111\u1ed9 ph\u1ea3n \u1ee9ng v\u00e0 h\u1ec7 s\u1ed1 Arrhenius c\u1ee7a pin lithium-ion trong qu\u00e1 tr\u00ecnh xuy\u00ean th\u1ee7ng.<\/span><\/p>\n

C\u00e1c th\u00f4ng s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c ph\u1ea3n \u1ee9ng c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh v\u00e0o pin lithium-ion, c\u0169ng nh\u01b0 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t. Hi\u1ec7n nay, c\u00e1c nh\u00f3m nghi\u00ean c\u1ee9u trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc \u0111\u00e3 ph\u00e2n t\u00edch qu\u00e1 tr\u00ecnh n\u00e0y v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ebfn an to\u00e0n pin t\u1eeb nhi\u1ec1u g\u00f3c \u0111\u1ed9 kh\u00e1c nhau th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m \u0111\u00e2m \u0111inh.<\/span><\/p>\n

2 K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m th\u1ef1c t\u1ebf<\/span><\/strong><\/span><\/h1>\n

Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m \u0111\u00e2m kim v\u00e0o pin lithium-ion 18650 c\u00f3 dung l\u01b0\u1ee3ng 22 Ah v\u00e0 th\u1ea5y r\u1eb1ng khi t\u1ed1c \u0111\u1ed9 \u0111\u00e2m kim t\u0103ng l\u00ean, kh\u1ea3 n\u0103ng pin lithium-ion v\u01b0\u1ee3t qua th\u1eed nghi\u1ec7m an to\u00e0n c\u0169ng t\u0103ng l\u00ean. Sau khi nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u1ed1c \u0111\u1ed9 kim \u0111\u1ebfn \u0111\u1ed9 an to\u00e0n c\u1ee7a pin lithium-ion t\u1ea1i Trung Qu\u1ed1c, ng\u01b0\u1eddi ta tin r\u1eb1ng t\u1ed1c \u0111\u1ed9 kim c\u00f3 t\u00e1c \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf \u0111\u1ebfn \u0111\u1ed9 an to\u00e0n c\u1ee7a kim c\u1ee7a pin h\u00ecnh tr\u1ee5; V\u00e0 n\u00f3 c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn \u0111\u1ed9 an to\u00e0n c\u1ee7a pin ngu\u1ed3n m\u1ec1m. C\u1ee5 th\u1ec3, t\u1ed1c \u0111\u1ed9 \u0111\u00e2m kim c\u00e0ng cao th\u00ec kh\u1ea3 n\u0103ng pin b\u1ecb m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t c\u00e0ng l\u1edbn. M\u1ed9t s\u1ed1 ng\u01b0\u1eddi tin r\u1eb1ng khi t\u1ed1c \u0111\u1ed9 \u0111\u00e2m kim ch\u1eadm h\u01a1n, th\u00ec l\u01b0\u1ee3ng nhi\u1ec7t c\u1ee5c b\u1ed9 t\u1ecfa ra c\u1ee7a pin c\u00e0ng cao.<\/span><\/p>\n

C\u00f3 th\u1ec3 th\u1ea5y t\u1eeb \u0111\u00e2y r\u1eb1ng k\u1ebft lu\u1eadn c\u1ee7a ba c\u00f4ng tr\u00ecnh tr\u00ean kh\u00f4ng nh\u1ea5t qu\u00e1n. C\u00f3 nhi\u1ec1u l\u00fd do c\u00f3 th\u1ec3 g\u00e2y ra t\u00ecnh tr\u1ea1ng n\u00e0y. Th\u1ee9 nh\u1ea5t, c\u1ea5u tr\u00fac cu\u1ed9n d\u00e2y v\u00e0 x\u1ebfp ch\u1ed3ng kh\u00e1c nhau, v\u1edbi lo\u1ea1i pin cu\u1ed9n d\u00e2y c\u00f3 ti\u1ebfp x\u00fac ch\u1eb7t ch\u1ebd h\u01a1n gi\u1eefa c\u00e1c l\u1edbp. Th\u1ee9 hai, khi t\u1ed1c \u0111\u1ed9 \u0111\u00e2m \u0111inh th\u1ea5p, m\u1ed9t m\u1eb7t, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a m\u00e0ng ng\u0103n b\u1ea3o v\u1ec7 pin v\u00e0 ng\u0103n ng\u1eeba x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong. M\u1ed9t m\u1eb7t, sau khi x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong, th\u1eddi gian d\u00f2ng \u0111i\u1ec7n cao c\u1ee5c b\u1ed9 t\u0103ng l\u00ean. Ngo\u00e0i ra, \u0111\u1ed9 d\u00e0y kh\u00e1c nhau c\u1ee7a l\u00e1 \u0111\u1ed3ng, l\u00e1 nh\u00f4m, \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m v\u00e0 b\u1ed9 t\u00e1ch c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m kh\u00e1c nhau \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 \u0111\u00e2m kim kh\u00e1c nhau.<\/span><\/p>\n

Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m \u0111\u00e2m kim tr\u00ean pin lithium-ion \u0111\u00e3 s\u1ea1c \u0111\u1ea7y b\u1eb1ng kim th\u00e9p h\u00ecnh kh\u1ed1i c\u00f3 k\u00edch th\u01b0\u1edbc 40 mm x 1,5 mm x 1,5 mm t\u1eeb c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau c\u1ee7a pin. H\u1ecd ph\u00e1t hi\u1ec7n ra r\u1eb1ng v\u1ecb tr\u00ed \u1edf gi\u1eefa m\u00e9p xanh c\u1ee7a pin, c\u00e1ch xa h\u01b0\u1edbng tai c\u1ef1c, g\u00e2y ra s\u1ef1 gia t\u0103ng nhi\u1ec7t \u0111\u1ed9 l\u1edbn nh\u1ea5t v\u00e0 c\u00f3 \u0111\u1ed9 an to\u00e0n k\u00e9m nh\u1ea5t. H\u1ecd tin r\u1eb1ng l\u00fd do ch\u00ednh cho hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t k\u00e9m c\u1ee7a b\u1ed9 t\u00e1ch c\u1ea1nh pin, h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng t\u1ea3n nhi\u1ec7t c\u1ee7a pin lithium-ion.<\/span><\/p>\n

Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m \u0111\u00e2m \u0111inh v\u00e0o pin lithium-ion 18650 c\u00f3 dung l\u01b0\u1ee3ng danh \u0111\u1ecbnh l\u00e0 22 Ah \u1edf c\u00e1c tr\u1ea1ng th\u00e1i s\u1ea1c kh\u00e1c nhau (SOC). Ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng khi SOC gi\u1ea3m, kh\u1ea3 n\u0103ng pin lithium-ion v\u01b0\u1ee3t qua c\u00e1c th\u1eed nghi\u1ec7m an to\u00e0n s\u1ebd t\u0103ng l\u00ean. \u0110i\u1ec1u n\u00e0y l\u00e0 do tr\u1ea1ng th\u00e1i s\u1ea1c c\u00e0ng cao th\u00ec \u0111i\u1ec7n \u00e1p ban \u0111\u1ea7u c\u1ee7a pin c\u00e0ng cao. \u0110i\u1ec1u n\u00e0y l\u00e0m t\u0103ng th\u00eam d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch b\u00ean trong v\u00e0 k\u00e9o d\u00e0i th\u1eddi gian ng\u1eafn m\u1ea1ch. Do \u0111\u00f3, t\u00ednh an to\u00e0n c\u1ee7a th\u1eed nghi\u1ec7m \u0111\u00e2m \u0111inh v\u00e0o pin lithium-ion tr\u1edf n\u00ean k\u00e9m h\u01a1n.<\/span><\/p>\n

Ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch \u0111\u1ed9 xuy\u00ean \u0111inh tr\u00ean pin lithium-ion 604-1104 m Ah \u0111\u01b0\u1ee3c s\u1ea1c \u0111\u1ea7y v\u00e0 ph\u00e1t hi\u1ec7n ra r\u1eb1ng dung l\u01b0\u1ee3ng pin c\u00e0ng cao th\u00ec \u0111\u1ed9 an to\u00e0n khi th\u1eed nghi\u1ec7m \u0111\u1ed9 xuy\u00ean \u0111inh \u0111\u1ed1i v\u1edbi pin lithium-ion c\u00e0ng k\u00e9m.<\/span><\/p>\n

Ngo\u00e0i ra, ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch th\u1eed nghi\u1ec7m \u0111\u00e2m xuy\u00ean \u0111inh tr\u00ean pin lithium-ion polymer s\u1eed d\u1ee5ng b\u1ed9 t\u00e1ch g\u1ed1m. H\u1ecd thu th\u1eadp nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nhi\u1ec1u lo\u1ea1i pin c\u00f3 SOC kh\u00e1c nhau \u1edf khu v\u1ef1c \u0111\u00e2m xuy\u00ean \u0111inh v\u00e0 b\u1ec1 m\u1eb7t pin, s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p c\u1ee7a pin v\u00e0 tr\u1ea1ng th\u00e1i g\u1edd c\u1ee7a pin lithium-ion sau khi \u0111inh \u0111\u00e2m xuy\u00ean. H\u1ecd ph\u00e2n t\u00edch c\u01a1 ch\u1ebf \u0111\u00e2m xuy\u00ean \u0111inh d\u1ef1a tr\u00ean \u0111i\u1ec1u n\u00e0y. Ng\u01b0\u1eddi ta tin r\u1eb1ng qu\u00e1 tr\u00ecnh \u0111\u00e2m kim xuy\u00ean qua pin khi\u1ebfn g\u1edd nh\u00f4m v\u00e0 g\u1edd \u0111\u1ed3ng k\u1ebft n\u1ed1i v\u1edbi nhau, t\u1ea1o th\u00e0nh m\u1ed9t m\u1ea1ch ng\u1eafn b\u00ean trong gi\u1eefa l\u00e1 nh\u00f4m v\u00e0 l\u00e1 \u0111\u1ed3ng.<\/span><\/p>\n

Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a v\u00f9ng ng\u1eafn m\u1ea1ch c\u1ee5c b\u1ed9 t\u0103ng l\u00ean khi sinh ra nhi\u1ec7t Joule. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea1t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y c\u1ee7a nh\u00f4m, g\u1edd nh\u00f4m s\u1ebd n\u00f3ng ch\u1ea3y v\u00e0 ch\u00e1y, g\u00e2y ra m\u1ed9t c\u1ea7u dao \u0111i\u1ec7n v\u1edbi g\u1edd \u0111\u1ed3ng. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft th\u00e0nh ba m\u00f4 h\u00ecnh: M\u00f4 h\u00ecnh A, trong \u0111\u00f3 g\u1edd nh\u00f4m n\u00f3ng ch\u1ea3y v\u00e0 g\u1edd \u0111\u1ed3ng kh\u00f4ng c\u00f2n ti\u1ebfp x\u00fac n\u1eefa. G\u1edd nh\u00f4m trong M\u00f4 h\u00ecnh B kh\u00f4ng n\u00f3ng ch\u1ea3y v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t m\u1ea1ch ng\u1eafn b\u00ean trong ti\u1ebfp x\u00fac v\u1edbi g\u1edd \u0111\u1ed3ng. G\u1edd nh\u00f4m trong M\u00f4 h\u00ecnh C kh\u00f4ng n\u00f3ng ch\u1ea3y ho\u00e0n to\u00e0n v\u00e0 sau m\u1ed9t th\u1eddi gian, ch\u00fang l\u1ea1i ti\u1ebfp x\u00fac v\u1edbi g\u1edd \u0111\u1ed3ng, t\u1ea1o th\u00e0nh m\u1ed9t m\u1ea1ch ng\u1eafn b\u00ean trong. H\u1ecd tin r\u1eb1ng vi\u1ec7c thay \u0111\u1ed5i qu\u00e1 tr\u00ecnh ch\u00e1y v\u00e0 n\u00f3ng ch\u1ea3y c\u1ee7a g\u1edd nh\u00f4m l\u00e0 m\u1ed9t h\u01b0\u1edbng \u0111i m\u1edbi cho thi\u1ebft k\u1ebf an to\u00e0n pin.<\/span><\/p>\n

Trong th\u00ed nghi\u1ec7m \u0111\u00e2m \u0111inh, kh\u00f4ng ch\u1ec9 ghi l\u1ea1i nhi\u1ec7t \u0111\u1ed9 g\u1ea7n kim pin, nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec7n c\u1ef1c v\u00e0 \u0111i\u1ec7n \u00e1p pin m\u00e0 c\u00f2n ghi l\u1ea1i nh\u1eefng thay \u0111\u1ed5i v\u1ec1 \u00e1p su\u1ea5t tr\u00ean b\u1ec1 m\u1eb7t pin v\u00e0 t\u00ecm th\u1ea5y s\u1ef1 t\u01b0\u01a1ng \u1ee9ng r\u00f5 r\u00e0ng gi\u1eefa \u0111\u1ec9nh \u00e1p su\u1ea5t tr\u00ean b\u1ec1 m\u1eb7t pin v\u00e0 \u0111\u1ec9nh nhi\u1ec7t \u0111\u1ed9 tr\u00ean pin.<\/span><\/p>\n

H\u1ecd tin r\u1eb1ng ngo\u00e0i \u0111i\u1ec7n \u00e1p v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin, \u0111\u1ed9 an to\u00e0n c\u1ee7a pin c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng c\u00e1ch t\u0103ng c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111o l\u01b0\u1eddng kh\u00e1c nh\u01b0 \u00e1p su\u1ea5t. Trong th\u00ed nghi\u1ec7m tr\u00ean, m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 ph\u00e2n t\u00edch \u0111\u1ed9 xuy\u00ean th\u1ee7ng c\u1ee7a \u0111inh v\u00e0o pin lithium-ion m\u1ed9t c\u00e1ch th\u1ef1c t\u1ebf h\u01a1n th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c nghi\u1ec7m. Tuy nhi\u00ean, lo\u1ea1i ng\u1eafn m\u1ea1ch x\u1ea3y ra b\u00ean trong pin trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m \u0111\u1ed9 xuy\u00ean th\u1ee7ng c\u1ee7a \u0111inh ch\u1ec9 l\u00e0 suy \u0111o\u00e1n v\u00e0 kh\u00f4ng c\u00f3 c\u01a1 s\u1edf l\u00fd thuy\u1ebft t\u1ed1t. M\u00f4 h\u00ecnh \u0111\u1ed9 xuy\u00ean th\u1ee7ng c\u1ee7a \u0111inh v\u00e0o pin lithium-ion l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c \u0111\u1ec3 ph\u00e2n t\u00edch c\u01a1 ch\u1ebf xuy\u00ean th\u1ee7ng c\u1ee7a \u0111inh v\u00e0o pin lithium-ion v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t an to\u00e0n c\u1ee7a ch\u00fang.<\/span><\/p>\n

3 K\u1ebft lu\u1eadn<\/span><\/strong><\/span><\/h1>\n

B\u00e0i vi\u1ebft n\u00e0y t\u00f3m t\u1eaft ph\u00e2n t\u00edch th\u1ef1c nghi\u1ec7m v\u1ec1 qu\u00e1 tr\u00ecnh \u0111\u00e2m kim trong pin lithium-ion. Trong s\u1ed1 \u0111\u00f3, m\u00f4 h\u00ecnh h\u00f3a v\u00e0 m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh pin l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 nghi\u00ean c\u1ee9u c\u01a1 ch\u1ebf \u0111\u00e2m \u0111inh pin, c\u1ea3i thi\u1ec7n thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac pin v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t an to\u00e0n c\u1ee7a pin. Hi\u1ec7n t\u1ea1i, ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c nghi\u1ec7m kh\u00f4ng th\u1ec3 ch\u1ec9 ra r\u00f5 r\u00e0ng v\u1ea5n \u0111\u1ec1 an to\u00e0n c\u1ee7a vi\u1ec7c \u0111\u00e2m \u0111inh pin. Tuy nhi\u00ean, c\u00e1c m\u00f4 h\u00ecnh \u0111\u00e2m \u0111inh hi\u1ec7n c\u00f3 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c qu\u00e1 tr\u00ecnh \u0111\u00e2m \u0111inh v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong do pin lithium-ion g\u00e2y ra. Do \u0111\u00f3, vi\u1ec7c c\u1ea3i thi\u1ec7n v\u00e0 ho\u00e0n thi\u1ec7n h\u01a1n n\u1eefa m\u00f4 h\u00ecnh \u0111\u00e2m \u0111inh c\u1ee7a pin lithium-ion l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n quan tr\u1ecdng \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng ph\u00e2n t\u00edch an to\u00e0n c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong pin.<\/span><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Pin lithium ion \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng, thi\u1ebft b\u1ecb khoa h\u1ecdc, ph\u01b0\u01a1ng ti\u1ec7n v\u1eadn chuy\u1ec3n kh\u00f4ng gian v\u00e0 h\u1ec7 th\u1ed1ng v\u1ec7 tinh do \u0111i\u1ec7n \u00e1p pin v\u00e0 n\u0103ng l\u01b0\u1ee3ng ri\u00eang cao, ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng r\u1ed9ng, tu\u1ed5i th\u1ecd l\u01b0u tr\u1eef d\u00e0i, kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m<\/p>\n","protected":false},"author":1,"featured_media":19621,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19620","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc-cong-nghe"],"acf":[],"_links":{"self":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19620","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/comments?post=19620"}],"version-history":[{"count":2,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19620\/revisions"}],"predecessor-version":[{"id":21926,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19620\/revisions\/21926"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19621"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19620"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}