{"id":19670,"date":"2023-08-24T08:33:36","date_gmt":"2023-08-24T08:33:36","guid":{"rendered":"http:\/\/dgbellvietnam.com\/lithium-ion-battery-temperature-test-2\/"},"modified":"2024-10-21T16:42:18","modified_gmt":"2024-10-21T09:42:18","slug":"lithium-ion-battery-temperature-test-2","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/lithium-ion-battery-temperature-test-2\/","title":{"rendered":"Th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 pin Lithium-ion"},"content":{"rendered":"
\n

Vi\u1ec7c l\u01b0u tr\u1eef pin lithium-ion r\u1ea5t ph\u1ed5 bi\u1ebfn trong th\u1ef1c t\u1ebf v\u00e0 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t th\u1eddi gian d\u00e0i trong chu k\u1ef3 s\u1ea3n xu\u1ea5t v\u00e0 b\u00e1n pin. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf, ch\u00fang c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t th\u1eddi gian d\u00e0i. Trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef pin lithium-ion, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao, h\u1ec7 th\u1ed1ng pin \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc khi s\u1ea1c \u0111\u1ea7y v\u00e0 s\u1ebd li\u00ean t\u1ee5c tr\u1ea3i qua qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i sang tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng. Khi nh\u1eefng thay \u0111\u1ed5i t\u00edch l\u0169y \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, n\u00f3 kh\u00f4ng ch\u1ec9 g\u00e2y ra nh\u1eefng thay \u0111\u1ed5i v\u1ec1 \u0111i\u1ec7n \u00e1p v\u00e0 \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1eb7c t\u00ednh an to\u00e0n. Do \u0111\u00f3, vi\u1ec7c nghi\u00ean c\u1ee9u hi\u1ec7u su\u1ea5t l\u01b0u tr\u1eef c\u1ee7a pin lithium-ion trong m\u1ed9t m\u00f4i tr\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh l\u00e0 \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng. B\u00e0i vi\u1ebft n\u00e0y nghi\u00ean c\u1ee9u s\u1ef1 suy gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a pin lithium-ion trong tr\u1ea1ng th\u00e1i s\u1ea1c \u0111\u1ea7y v\u00e0 l\u01b0u tr\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, bao g\u1ed3m nh\u1eefng thay \u0111\u1ed5i v\u1ec1 \u0111i\u1ec7n \u00e1p, \u0111i\u1ec7n tr\u1edf, t\u1ef7 l\u1ec7 duy tr\u00ec dung l\u01b0\u1ee3ng, tr\u1edf kh\u00e1ng v\u00e0 \u0111\u1ed9 ph\u00f3ng \u0111\u1ea1i sau khi l\u01b0u tr\u1eef.<\/span><\/span><\/p>\n

1 Th\u1eed nghi\u1ec7m<\/span><\/span><\/strong><\/span><\/h1>\n

1) \u0110\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m<\/span><\/span><\/span><\/h2>\n

Pin h\u00ecnh tr\u1ee5 18650<\/span><\/span><\/p>\n

2) Ki\u1ec3m tra s\u1ea1c v\u00e0 x\u1ea3<\/span><\/span><\/span><\/h2>\n

Tr\u01b0\u1edbc khi l\u01b0u tr\u1eef pin, h\u00e3y ki\u1ec3m tra hi\u1ec7u su\u1ea5t s\u1ea1c v\u00e0 x\u1ea3. Sau khi \u0111\u1ec3 \u1edf nhi\u1ec7t \u0111\u1ed9 45 \u2103 trong 24 gi\u1edd, h\u00e3y s\u1eed d\u1ee5ng m\u00e1y ki\u1ec3m tra \u0111\u1ec3 ki\u1ec3m tra hi\u1ec7u su\u1ea5t c\u1ee7a pin \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. \u0110\u1ea7u ti\u00ean, h\u00e3y s\u1ea1c pin \u1edf d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i t\u1eeb 0,1C \u0111\u1ebfn 4,1V, sau \u0111\u00f3 s\u1ea1c \u1edf \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i 4,1V cho \u0111\u1ebfn khi d\u00f2ng \u0111i\u1ec7n gi\u1ea3m xu\u1ed1ng 0,01C, \u0111\u1ec3 y\u00ean trong 10 ph\u00fat, sau \u0111\u00f3 x\u1ea3 \u1edf d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i t\u1eeb 0,1C \u0111\u1ebfn 2,7V. Sau hai chu k\u1ef3, h\u00e3y s\u1ea1c pin \u1edf d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i t\u1eeb 0,1C \u0111\u1ebfn 4,1V, \u0111\u1ec3 pin c\u00f3 tr\u1ea1ng th\u00e1i s\u1ea1c \u0111\u1ea7y.<\/span><\/span><\/p>\n

3) Ki\u1ec3m tra l\u01b0u tr\u1eef<\/span><\/span><\/span><\/h2>\n

Th\u00ed nghi\u1ec7m l\u01b0u tr\u1eef pin s\u1ebd l\u01b0u tr\u1eef pin lithium-ion \u1edf tr\u1ea1ng th\u00e1i s\u1ea1c \u0111\u1ea7y trong <\/span><\/span>c\u00e1c bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i l\u1ea7n<\/span><\/span><\/a> l\u01b0\u1ee3t \u1edf 25 \u2103, 45 \u2103, 55 \u2103 v\u00e0 65 \u2103. Th\u00ed nghi\u1ec7m l\u01b0u tr\u1eef s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh v\u00e0 ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t \u0111i\u1ec7n h\u00f3a v\u00e0 th\u1eed nghi\u1ec7m li\u00ean quan \u0111\u1ebfn \u0111i\u1ec7n \u00e1p, \u0111i\u1ec7n tr\u1edf trong, v.v. s\u1ebd \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng.<\/span><\/span><\/p>\n

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

1) Thay \u0111\u1ed5i dung l\u01b0\u1ee3ng pin<\/span><\/span><\/span><\/h2>\n

T\u1ef7 l\u1ec7 duy tr\u00ec dung l\u01b0\u1ee3ng sau 241 ng\u00e0y l\u01b0u tr\u1eef \u1edf 25 \u2103, 45 \u2103 v\u00e0 55 \u2103 l\u1ea7n l\u01b0\u1ee3t l\u00e0 91,47%, 80,19% v\u00e0 73,21%, trong khi ch\u1ec9 c\u00f2n 70,34% sau 150 ng\u00e0y l\u01b0u tr\u1eef \u1edf 65 \u2103. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng \u0111i\u1ec7n \u00e1p m\u1ea1ch h\u1edf c\u1ee7a pin lithium-ion \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf 65 \u2103 gi\u1ea3m nhanh h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi pin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n. \u0110i\u1ec1u n\u00e0y l\u00e0 do pin tr\u1ea3i qua qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i t\u1eeb tr\u1ea1ng th\u00e1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc sang tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef, d\u1eabn \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i trong c\u1ea5u tr\u00fac c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u00e1c ph\u1ea3n \u1ee9ng t\u1ef1 ph\u00f3ng \u0111i\u1ec7n nh\u01b0 m\u1ea5t lithium ho\u1ea1t \u0111\u1ed9ng trong carbon graphite. Khi nhi\u1ec7t \u0111\u1ed9 l\u01b0u tr\u1eef t\u0103ng l\u00ean, c\u00e1c ph\u1ea3n \u1ee9ng x\u1ea3y ra b\u00ean trong pin lithium-ion tr\u1edf n\u00ean m\u1ea1nh h\u01a1n.<\/span><\/span><\/p>\n

\u0110\u1ed3ng th\u1eddi, t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng ph\u00e2n h\u1ee7y c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n t\u0103ng l\u00ean \u1edf nhi\u1ec7t \u0111\u1ed9 cao, d\u1eabn \u0111\u1ebfn s\u1ef1 l\u1eafng \u0111\u1ecdng nhanh ch\u00f3ng c\u1ee7a t\u1ea1p ch\u1ea5t v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m ph\u1ea3n \u1ee9ng ph\u1ee5 tr\u00ean c\u00e1c t\u1ea5m \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m. \u0110i\u1ec1u n\u00e0y c\u0169ng d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n \u00e1p pin gi\u1ea3m nhanh h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao. K\u1ebft qu\u1ea3 ch\u1ec9 ra r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin lithium-ion trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef s\u1ebd \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc b\u00ean trong pin, t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t l\u01b0u tr\u1eef c\u1ee7a pin. Nhi\u1ec7t \u0111\u1ed9 c\u00e0ng cao, s\u1ef1 suy gi\u1ea3m hi\u1ec7u su\u1ea5t c\u00e0ng nghi\u00eam tr\u1ecdng.<\/span><\/span><\/p>\n

2) Thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin<\/span><\/span><\/span><\/h2>\n

\u0110i\u1ec7n tr\u1edf trong c\u1ee7a pin lithium-ion l\u00e0 \u0111i\u1ec7n tr\u1edf m\u00e0 pin lithium-ion g\u1eb7p ph\u1ea3i khi d\u00f2ng \u0111i\u1ec7n c\u1ee7a ch\u00fang \u0111i qua c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nhau b\u00ean trong pin trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng. \u0110\u00e2y l\u00e0 t\u1ed5ng \u0111i\u1ec7n tr\u1edf gi\u1eefa c\u00e1c c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m, bao g\u1ed3m \u0111i\u1ec7n tr\u1edf c\u1ee7a c\u00e1c ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng d\u01b0\u01a1ng v\u00e0 \u00e2m, ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, m\u00e0ng ng\u0103n v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i c\u1ee7a b\u1ed9 thu d\u00f2ng \u0111i\u1ec7n. Khi x\u1ea3 pin lithium-ion, n\u1ebfu \u0111i\u1ec7n tr\u1edf trong nh\u1ecf, th\u00ec \u0111\u1ed9 s\u1ee5t \u00e1p t\u1ea1o ra trong qu\u00e1 tr\u00ecnh x\u1ea3 c\u0169ng s\u1ebd nh\u1ecf h\u01a1n, d\u1eabn \u0111\u1ebfn m\u1ea5t dung l\u01b0\u1ee3ng \u00edt h\u01a1n v\u00e0 gi\u1ea3i ph\u00f3ng nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n. Do \u0111\u00f3, s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin lithium-ion c\u0169ng l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ea7n ch\u00fa \u00fd trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef.<\/span><\/span><\/p>\n

T\u1eeb d\u1eef li\u1ec7u, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 l\u01b0u tr\u1eef c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion. \u0110i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion s\u1ebd ti\u1ebfp t\u1ee5c t\u0103ng trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u00e0ng cao th\u00ec m\u1ee9c t\u0103ng c\u00e0ng \u0111\u00e1ng k\u1ec3. Sau khi l\u01b0u tr\u1eef \u1edf 25 \u2103 trong 241 ng\u00e0y, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion ch\u1ec9 t\u0103ng 4,2m \u03a9 (17,95%). \u1ede 45 \u2103, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin t\u0103ng 8,6 m \u03a9 (37,07%) sau 241 ng\u00e0y. Khi nhi\u1ec7t \u0111\u1ed9 l\u01b0u tr\u1eef \u0111\u1ea1t 55 \u2103 ho\u1eb7c 65 \u2103, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion s\u1ebd c\u00f3 s\u1ef1 thay \u0111\u1ed5i m\u1ea1nh, t\u0103ng l\u1ea7n l\u01b0\u1ee3t 13,5 m (56,25%) v\u00e0 16,9 m\u03a9 (70,42%) sau 150 ng\u00e0y l\u01b0u tr\u1eef, v\u1edbi m\u1ee9c t\u0103ng kho\u1ea3ng 3,7 v\u00e0 4,6 l\u1ea7n so v\u1edbi l\u01b0u tr\u1eef \u1edf 25 \u2103 trong c\u00f9ng th\u1eddi gian.<\/span><\/span><\/p>\n

3) Hi\u1ec7u su\u1ea5t t\u1ed1c \u0111\u1ed9 pin<\/span><\/span><\/span><\/h2>\n

Dung l\u01b0\u1ee3ng x\u1ea3 c\u1ee7a pin lithium-ion \u1edf \u0111\u1ed9 ph\u00f3ng \u0111\u1ea1i 0,2C, 1C v\u00e0 2C tr\u01b0\u1edbc khi l\u01b0u tr\u1eef l\u1ea7n l\u01b0\u1ee3t l\u00e0 1742mAh, 1612mAh v\u00e0 1357mAh. Sau 30 ng\u00e0y l\u01b0u tr\u1eef \u1edf 65 \u2103, dung l\u01b0\u1ee3ng x\u1ea3 l\u1ea7n l\u01b0\u1ee3t l\u00e0 1594mAh, 1354mAh v\u00e0 1065mAh. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng sau khi l\u01b0u tr\u1eef \u1edf 65 \u2103, dung l\u01b0\u1ee3ng x\u1ea3 c\u1ee7a pin \u1edf m\u1ed7i t\u1ed1c \u0111\u1ed9 \u0111\u1ec1u gi\u1ea3m \u0111\u00e1ng k\u1ec3.<\/span><\/span><\/p>\n

Kh\u1ea3 n\u0103ng x\u1ea3 \u1edf t\u1ed1c \u0111\u1ed9 2C tr\u01b0\u1edbc khi l\u01b0u tr\u1eef l\u00e0 77,90% t\u1ed1c \u0111\u1ed9 0,2C, trong khi kh\u1ea3 n\u0103ng x\u1ea3 \u1edf t\u1ed1c \u0111\u1ed9 2C sau khi l\u01b0u tr\u1eef l\u00e0 66,81% t\u1ed1c \u0111\u1ed9 0,2C. Ngo\u00e0i ra, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng sau 30 ng\u00e0y l\u01b0u tr\u1eef \u1edf 65 \u2103, m\u1ee9c x\u1ea3 c\u1ee7a m\u1ed7i t\u1ed1c \u0111\u1ed9 pin \u0111\u00e3 gi\u1ea3m. \u0110i\u1ec1u n\u00e0y l\u00e0 do s\u1ef1 gia t\u0103ng ph\u00e2n c\u1ef1c g\u00e2y ra b\u1edfi c\u00e1c ph\u1ea3n \u1ee9ng b\u00ean trong pin trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef, l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion lithium trong v\u1eadt li\u1ec7u \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n sau khi l\u01b0u tr\u1eef, d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ed1c \u0111\u1ed9 c\u1ee7a pin k\u00e9m sau khi l\u01b0u tr\u1eef.<\/span><\/span><\/p>\n

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

1) Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin lithium-ion trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef s\u1ebd \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc b\u00ean trong pin, t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t l\u01b0u tr\u1eef c\u1ee7a pin. Nhi\u1ec7t \u0111\u1ed9 c\u00e0ng cao, hi\u1ec7u su\u1ea5t suy gi\u1ea3m c\u00e0ng nghi\u00eam tr\u1ecdng. Sau khi l\u01b0u tr\u1eef \u1edf 25 \u2103, 45 \u2103 v\u00e0 55 \u2103 trong 241 ng\u00e0y, t\u1ef7 l\u1ec7 duy tr\u00ec dung l\u01b0\u1ee3ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 91,47%, 80,19% v\u00e0 73,21%, trong khi sau khi l\u01b0u tr\u1eef \u1edf 65 \u2103 trong 150 ng\u00e0y, ch\u1ec9 c\u00f2n l\u1ea1i 70,34%. \u0110i\u1ec7n tr\u1edf b\u00ean trong t\u0103ng l\u00ean trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef. Khi nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea1t 55\u2103 ho\u1eb7c 65\u2103, sau 150 ng\u00e0y b\u1ea3o qu\u1ea3n, \u0111i\u1ec7n tr\u1edf t\u0103ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 13,5m\u03a9(56,25%) v\u00e0 16,9m\u03a9(70,42%), t\u0103ng kho\u1ea3ng 3,7 v\u00e0 4,6 l\u1ea7n so v\u1edbi nhi\u1ec7t \u0111\u1ed9 b\u1ea3o qu\u1ea3n l\u00e0 25\u2103 trong c\u00f9ng th\u1eddi gian.<\/span><\/span><\/p>\n

2) C\u00e1c ph\u1ea3n \u1ee9ng b\u00ean trong c\u1ee7a pin trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef s\u1ebd g\u00e2y ra s\u1ef1 ph\u00e2n c\u1ef1c, v\u00e0 nh\u1eefng ph\u1ea3n \u1ee9ng n\u00e0y l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion lithium trong v\u1eadt li\u1ec7u \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n sau khi l\u01b0u tr\u1eef, d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ed1c \u0111\u1ed9 c\u1ee7a pin sau khi l\u01b0u tr\u1eef k\u00e9m. Kh\u1ea3 n\u0103ng x\u1ea3 \u1edf \u0111\u1ed9 ph\u00f3ng \u0111\u1ea1i 2C tr\u01b0\u1edbc khi l\u01b0u tr\u1eef l\u00e0 77,90% c\u1ee7a 0,2C v\u00e0 sau 30 ng\u00e0y l\u01b0u tr\u1eef \u1edf 65 \u2103, kh\u1ea3 n\u0103ng x\u1ea3 \u1edf \u0111\u1ed9 ph\u00f3ng \u0111\u1ea1i 2C l\u00e0 66,81% c\u1ee7a 0,2C.<\/span><\/span><\/p>\n

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<\/div>\n
<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Vi\u1ec7c l\u01b0u tr\u1eef pin lithium-ion r\u1ea5t ph\u1ed5 bi\u1ebfn trong th\u1ef1c t\u1ebf v\u00e0 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t th\u1eddi gian d\u00e0i trong chu k\u1ef3 s\u1ea3n xu\u1ea5t v\u00e0 b\u00e1n pin. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf, ch\u00fang c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t th\u1eddi gian d\u00e0i. Trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef<\/p>\n","protected":false},"author":1,"featured_media":19671,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19670","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\/19670","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=19670"}],"version-history":[{"count":2,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19670\/revisions"}],"predecessor-version":[{"id":21967,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19670\/revisions\/21967"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19671"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}