{"id":19688,"date":"2023-06-21T09:24:00","date_gmt":"2023-06-21T09:24:00","guid":{"rendered":"http:\/\/dgbellvietnam.com\/low-temperature-test-for-li-ion-battery\/"},"modified":"2024-10-21T20:29:44","modified_gmt":"2024-10-21T13:29:44","slug":"low-temperature-test-for-li-ion-battery","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/low-temperature-test-for-li-ion-battery\/","title":{"rendered":"Th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 th\u1ea5p cho pin Li-ion"},"content":{"rendered":"
\n

Pin lithium s\u1eaft phosphate l\u00e0 lo\u1ea1i pin lithium-ion r\u1ea5t c\u00f3 ti\u1ec1m n\u0103ng tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay. Hi\u1ec7n nay, nghi\u00ean c\u1ee9u v\u1ec1 pin lithium s\u1eaft phosphate ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd pin v\u00e0 \u01b0\u1edbc t\u00ednh tr\u1ea1ng th\u00e1i s\u1ea1c. Hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u th\u00eam, \u0111\u1eb7c bi\u1ec7t l\u00e0 hi\u1ec7u su\u1ea5t \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Hi\u1ec7n nay, c\u00e1c thi\u1ebft b\u1ecb th\u1ea3i lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nghi\u00ean c\u1ee9u khoa h\u1ecdc Nam C\u1ef1c v\u1ec1 c\u01a1 b\u1ea3n \u0111\u1ec1u \u0111\u01b0\u1ee3c cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng b\u1eb1ng pin axit ch\u00ec, g\u00e2y \u00f4 nhi\u1ec5m nghi\u00eam tr\u1ecdng.<\/span><\/span><\/p>\n

Tuy nhi\u00ean, c\u00f4ng su\u1ea5t ri\u00eang v\u00e0 n\u0103ng l\u01b0\u1ee3ng ri\u00eang c\u1ee7a pin Lithium s\u1eaft phosphate cao h\u01a1n so v\u1edbi pin axit ch\u00ec, c\u00f3 t\u1ef7 l\u1ec7 t\u1ef1 x\u1ea3 th\u1ea5p v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng, v\u00e0 ch\u00fang ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi Nam C\u1ef1c. Gi\u00f3 l\u1ea1nh quanh n\u0103m \u1edf Nam C\u1ef1c, ch\u1eb3ng h\u1ea1n nh\u01b0 Tr\u1ea1m C\u00f4n L\u00f4n, n\u1eb1m \u1edf \u0111\u1ed9 cao nh\u1ea5t \u1edf Nam C\u1ef1c, c\u00f3 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh h\u00e0ng n\u0103m l\u00e0 -58,4 \u2103 v\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u1ed1i thi\u1ec3u l\u00e0 -82 \u2103. B\u00e0i b\u00e1o n\u00e0y m\u00f4 ph\u1ecfng m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u1edf Nam C\u1ef1c, ti\u1ebfn h\u00e0nh c\u00e1c th\u00ed nghi\u1ec7m s\u1ea1c v\u00e0 x\u1ea3 tr\u00ean pin Lithium s\u1eaft phosphate trong c\u00e1c m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p kh\u00e1c nhau v\u00e0 ph\u00e2n t\u00edch c\u00e1c k\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m, cung c\u1ea5p c\u01a1 s\u1edf cho vi\u1ec7c l\u1ef1a ch\u1ecdn pin v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng s\u01b0\u1edfi \u1ea5m.<\/span><\/span><\/p>\n

1.Th\u1eed nghi\u1ec7m s\u1ea1c pin<\/span><\/span><\/strong><\/span><\/h1>\n

Trong th\u1eed nghi\u1ec7m n\u00e0y, ngu\u1ed3n \u0111i\u1ec7n DC \u1ed5n \u0111\u1ecbnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea1c pin v\u00e0 <\/span><\/span>bu\u1ed3ng th\u1eed nghi\u1ec7m xen k\u1ebd nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 th\u1ea5p<\/span><\/span><\/a> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00f4 ph\u1ecfng m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p ph\u00e2n c\u1ef1c. D\u00f2ng \u0111i\u1ec7n s\u1ea1c kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111i\u1ec7n \u00e1p s\u1ea1c t\u1ed1i \u0111a cho ph\u00e9p c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n DC \u1ed5n \u0111\u1ecbnh \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. D\u00f2ng \u0111i\u1ec7n s\u1ea1c \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong th\u00ed nghi\u1ec7m l\u1ea7n l\u01b0\u1ee3t l\u00e0 1, 2 v\u00e0 3A v\u00e0 \u0111i\u1ec7n \u00e1p ng\u1eaft s\u1ea1c l\u00e0 14,7V. Khi pin \u0111\u01b0\u1ee3c s\u1ea1c \u0111\u1ebfn 14,7V, ngu\u1ed3n \u0111i\u1ec7n d\u1eebng s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 b\u1eaft \u0111\u1ea7u s\u1ea1c \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i. Qu\u00e1 tr\u00ecnh s\u1ea1c pin nh\u01b0 sau: \u1edf giai \u0111o\u1ea1n \u0111\u1ea7u, d\u00f2ng \u0111i\u1ec7n \u1edf tr\u1ea1ng th\u00e1i s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i. Khi qu\u00e1 tr\u00ecnh s\u1ea1c ti\u1ebfp t\u1ee5c, \u0111i\u1ec7n \u00e1p pin t\u0103ng d\u1ea7n. Khi \u0111\u1ea1t \u0111\u1ebfn 14,7V, n\u00f3 chuy\u1ec3n sang s\u1ea1c \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i v\u00e0 d\u00f2ng \u0111i\u1ec7n c\u1ee5 th\u1ec3 gi\u1ea3m d\u1ea7n xu\u1ed1ng kho\u1ea3ng 0,2A.<\/span><\/span><\/p>\n

Trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, ion lithium c\u1ee7a than ch\u00ec nh\u00fang lithium kh\u00f3 \u0111\u01b0\u1ee3c nh\u00fang v\u00e0o c\u1ef1c d\u01b0\u01a1ng than ch\u00ec d\u01b0\u1edbi -20 \u2103, do \u0111\u00f3 kh\u1ea3 n\u0103ng ti\u1ebfp nh\u1eadn s\u1ea1c c\u1ee7a pin Lithium s\u1eaft phosphate s\u1ebd b\u1ecb gi\u1ea3m v\u00e0 t\u1ed1c \u0111\u1ed9 s\u1ea1c s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3 trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p so v\u1edbi nhi\u1ec7t \u0111\u1ed9 b\u00ecnh th\u01b0\u1eddng. Trong qu\u00e1 tr\u00ecnh s\u1ea1c, nhi\u1ec7t \u0111\u1ed9 b\u00ean trong pin th\u01b0\u1eddng s\u1ebd t\u0103ng l\u00ean, \u0111i\u1ec1u n\u00e0y s\u1ebd \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn vi\u1ec7c s\u1ea1c pin \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. Tuy nhi\u00ean, nhi\u1ec7t \u0111\u1ed9 t\u0103ng trong qu\u00e1 tr\u00ecnh s\u1ea1c \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p s\u1ebd c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t s\u1ea1c c\u1ee7a pin. Do kh\u1ea3 n\u0103ng s\u1ea1c c\u1ee7a pin gi\u1ea3m \u0111\u00e1ng k\u1ec3 khi s\u1ea1c trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u0111\u1ec3 nghi\u00ean c\u1ee9u hi\u1ec7u su\u1ea5t s\u1ea1c c\u1ee7a pin trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, pin \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p kh\u00e1c nhau v\u00e0 s\u1ea1c \u1edf d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i v\u1edbi c\u00e1c d\u00f2ng \u0111i\u1ec7n kh\u00e1c nhau. Trong th\u00ed nghi\u1ec7m n\u00e0y, s\u1ea1c d\u00f2ng \u0111i\u1ec7n th\u1ea5p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 ch\u1ea5p nh\u1eadn s\u1ea1c c\u1ee7a pin. D\u00f2ng \u0111i\u1ec7n s\u1ea1c l\u1ea7n l\u01b0\u1ee3t l\u00e0 1, 2 v\u00e0 3A. \u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng b\u00ecnh th\u01b0\u1eddng, -10, -20 v\u00e0 -30 \u2103, pin Lithium s\u1eaft phosphate \u0111\u01b0\u1ee3c s\u1ea1c \u1edf d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i. T\u1ed5ng c\u1ed9ng c\u00f3 12 nh\u00f3m th\u00ed nghi\u1ec7m. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp v\u00e0 ph\u00e2n t\u00edch.<\/span><\/span><\/p>\n

S\u1ea1c pin Lithium s\u1eaft phosphate \u1edf d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i v\u1edbi d\u00f2ng \u0111i\u1ec7n 3A, v\u00e0 thu th\u1eadp v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u sau m\u1ed7i 10 ph\u00fat. T\u1eeb d\u1eef li\u1ec7u, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng trong giai \u0111o\u1ea1n s\u1ea1c ban \u0111\u1ea7u, pin \u0111\u01b0\u1ee3c s\u1ea1c \u1edf d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 3A. \u0110i\u1ec7n \u00e1p thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 v\u00e0 \u0111\u01b0\u1eddng cong \u0111i\u1ec7n \u00e1p t\u0103ng \u0111\u1ed9t ng\u1ed9t l\u00ean kho\u1ea3ng 13V, b\u01b0\u1edbc v\u00e0o giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p. \u0110\u01b0\u1eddng cong t\u0103ng nh\u1eb9 v\u00e0 cu\u1ed1i c\u00f9ng \u0111i\u1ec7n \u00e1p v\u1eabn kh\u00f4ng \u0111\u1ed5i. D\u00f2ng \u0111i\u1ec7n b\u1eaft \u0111\u1ea7u gi\u1ea3m, gi\u1ea3m xu\u1ed1ng kho\u1ea3ng 0,2A v\u00e0 qu\u00e1 tr\u00ecnh s\u1ea1c k\u1ebft th\u00fac.<\/span><\/span><\/p>\n

C\u00f3 th\u1ec3 th\u1ea5y t\u1eeb s\u1ef1 so s\u00e1nh r\u1eb1ng, khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng gi\u1ea3m, khi pin Lithium s\u1eaft phosphate \u0111\u01b0\u1ee3c s\u1ea1c v\u1edbi c\u00f9ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i, th\u1eddi gian \u0111\u1ec3 \u0111i\u1ec7n \u00e1p \u0111i v\u00e0o giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh s\u1ebd \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn. S\u1ed1 l\u1ea7n thu th\u1eadp b\u1eaft \u0111\u1ea7u \u0111i v\u00e0o giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p \u1edf kho\u1ea3ng 50 l\u1ea7n \u1edf nhi\u1ec7t \u0111\u1ed9 b\u00ecnh th\u01b0\u1eddng, kho\u1ea3ng 40 l\u1ea7n \u1edf -10 \u2103, kho\u1ea3ng 20 l\u1ea7n \u1edf -20 \u2103 v\u00e0 \u00edt h\u01a1n 20 l\u1ea7n \u1edf -30 \u2103; Xu h\u01b0\u1edbng t\u0103ng chung c\u1ee7a \u0111i\u1ec7n \u00e1p pin v\u1eabn kh\u00f4ng thay \u0111\u1ed5i, nh\u01b0ng nhi\u1ec7t \u0111\u1ed9 c\u00e0ng th\u1ea5p, pin \u0111\u1ea1t \u0111\u1ebfn gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p c\u00e0i \u0111\u1eb7t c\u00e0ng nhanh, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 th\u1eddi gian ho\u00e0n th\u00e0nh qu\u00e1 tr\u00ecnh s\u1ea1c c\u00e0ng ng\u1eafn. \u1ede nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, pin ho\u00e0n th\u00e0nh qu\u00e1 tr\u00ecnh s\u1ea1c khi t\u1ea7n su\u1ea5t thu th\u1eadp l\u00e0 400 l\u1ea7n, 300 l\u1ea7n \u1edf -10 \u2103, 200 l\u1ea7n \u1edf -20 \u2103 v\u00e0 120 l\u1ea7n \u1edf -30 \u2103. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, ng\u01b0\u1eddi ta c\u0169ng ph\u00e1t hi\u1ec7n ra r\u1eb1ng khi s\u1ea1c b\u1eb1ng d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i \u1edf c\u00f9ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n, c\u00e1c giai \u0111o\u1ea1n s\u1ea1c cho d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i l\u00e0 kh\u00e1c nhau \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau. Nhi\u1ec7t \u0111\u1ed9 c\u00e0ng th\u1ea5p, giai \u0111o\u1ea1n s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i c\u00e0ng ng\u1eafn, th\u1eadm ch\u00ed tr\u1ef1c ti\u1ebfp v\u00e0o giai \u0111o\u1ea1n s\u1ea1c \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i. Do \u0111\u00f3, khi s\u1ea1c pin theo c\u00f9ng m\u1ed9t c\u00e1ch, nhi\u1ec7t \u0111\u1ed9 c\u00e0ng th\u1ea5p, th\u1eddi gian ho\u00e0n th\u00e0nh s\u1ea1c c\u00e0ng ng\u1eafn.<\/span><\/span><\/p>\n

2.Th\u1eed nghi\u1ec7m x\u1ea3 pin<\/span><\/span><\/strong><\/span><\/h1>\n

Trong th\u00ed nghi\u1ec7m n\u00e0y, pin lithium s\u1eaft phosphate \u0111\u01b0\u1ee3c x\u1ea3 b\u1eb1ng c\u00e1ch x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 m\u1ed9t m\u00e1y ki\u1ec3m tra dung l\u01b0\u1ee3ng pin c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn cho th\u00ed nghi\u1ec7m x\u1ea3. Th\u00ed nghi\u1ec7m n\u00e0y l\u00e0 x\u1ea3 d\u00f2ng \u0111i\u1ec7n th\u1ea5p v\u00e0 d\u00f2ng \u0111i\u1ec7n x\u1ea3 c\u1ee7a m\u00e1y ki\u1ec3m tra \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh 2A. \u0110\u1ec3 x\u1ea3 ho\u00e0n to\u00e0n pin, \u0111i\u1ec7n \u00e1p c\u1eaft x\u1ea3 \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh 9,5V.<\/span><\/span><\/p>\n

\u0110\u1ec3 nghi\u00ean c\u1ee9u hi\u1ec7u su\u1ea5t x\u1ea3 c\u1ee7a pin trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, pin \u0111\u01b0\u1ee3c s\u1ea1c \u0111\u1ea7y \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau v\u00e0 ch\u1ecbu s\u1ef1 x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i \u1edf c\u00f9ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n. Trong th\u00ed nghi\u1ec7m n\u00e0y, x\u1ea3 d\u00f2ng \u0111i\u1ec7n nh\u1ecf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t x\u1ea3 c\u1ee7a pin, v\u00ec trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, x\u1ea3 d\u00f2ng \u0111i\u1ec7n nh\u1ecf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 \u0111\u1ec1u tr\u00ean \u0111i\u1ec7n c\u1ef1c pin v\u00e0 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc b\u00ean trong pin \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ea7y \u0111\u1ee7, c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 s\u00e2u x\u1ea3 c\u1ee7a pin. Trong th\u00ed nghi\u1ec7m n\u00e0y, d\u00f2ng \u0111i\u1ec7n 2A \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1ea3 pin Lithium s\u1eaft phosphate \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, -10, -20, -30 \u2103, t\u1ed5ng c\u1ed9ng c\u00f3 4 nh\u00f3m th\u00ed nghi\u1ec7m.<\/span><\/span><\/p>\n

Trong giai \u0111o\u1ea1n \u0111\u1ea7u x\u1ea3 pin, \u0111i\u1ec7n \u00e1p s\u1ebd gi\u1ea3m m\u1ea1nh, sau \u0111\u00f3 gi\u1ea3m d\u1ea7n v\u00e0 k\u00e9o d\u00e0i trong th\u1eddi gian d\u00e0i. Khi k\u1ebft th\u00fac x\u1ea3, \u0111i\u1ec7n \u00e1p s\u1ebd gi\u1ea3m m\u1ea1nh xu\u1ed1ng \u0111i\u1ec7n \u00e1p c\u1eaft. K\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m cho th\u1ea5y \u1edf c\u00f9ng t\u1ed1c \u0111\u1ed9 x\u1ea3, \u0111i\u1ec7n \u00e1p x\u1ea3 ban \u0111\u1ea7u c\u1ee7a pin gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m. \u0110i\u1ec7n \u00e1p x\u1ea3 ban \u0111\u1ea7u l\u00e0 14,48V \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, 14V \u1edf -10 \u2103, 13,6V \u1edf -20 \u2103 v\u00e0 13,3V \u1edf -30 \u2103.<\/span><\/span><\/p>\n

\u0110i\u1ec7n \u00e1p c\u1ee7a pin Lithium s\u1eaft phosphate s\u1ebd gi\u1ea3m \u0111\u1ed9t ng\u1ed9t khi b\u1eaft \u0111\u1ea7u x\u1ea3. \u0110i\u1ec1u n\u00e0y l\u00e0 do khi x\u1ea3 pin trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, khi nhi\u1ec7t \u0111\u1ed9 pin b\u1eaft \u0111\u1ea7u gi\u1ea3m, c\u00e1c ho\u1ea1t ch\u1ea5t tham gia ph\u1ea3n \u1ee9ng b\u00ean trong pin gi\u1ea3m v\u00e0 kh\u00f4ng th\u1ec3 ph\u1ea3n \u1ee9ng ho\u00e0n to\u00e0n, d\u1eabn \u0111\u1ebfn hi\u1ec7u \u1ee9ng ph\u00e2n c\u1ef1c c\u1ee7a pin t\u0103ng l\u00ean. Do \u0111\u00f3, trong giai \u0111o\u1ea1n x\u1ea3 pin ban \u0111\u1ea7u, \u0111i\u1ec7n \u00e1p c\u1ef1c gi\u1ea3m m\u1ea1nh xu\u1ed1ng kho\u1ea3ng 13,3V v\u00e0 \u0111i\u1ec7n \u00e1p pin tr\u00e1i v\u00e0 ph\u1ea3i b\u1eaft \u0111\u1ea7u duy tr\u00ec m\u1ee9c x\u1ea3 \u1ed5n \u0111\u1ecbnh, v\u1edbi nh\u1eefng thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p ch\u1eadm. Khi pin ti\u1ebfp t\u1ee5c x\u1ea3, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin t\u0103ng l\u00ean, nhi\u1ec7t \u0111\u1ed9 b\u00ean trong c\u1ee7a pin t\u0103ng l\u00ean v\u00e0 m\u1ed9t ph\u1ea7n c\u00e1c ho\u1ea1t ch\u1ea5t trong pin \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. Khi \u0111i\u1ec7n \u00e1p gi\u1ea3m xu\u1ed1ng kho\u1ea3ng 12,5V, \u0111i\u1ec7n \u00e1p pin \u0111\u1ed9t nhi\u00ean gi\u1ea3m tr\u1edf l\u1ea1i. Khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin ti\u1ebfp t\u1ee5c t\u0103ng, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin gi\u1ea3m v\u00e0 nhi\u1ec7t sinh ra b\u00ean trong pin c\u0169ng gi\u1ea3m. Tuy nhi\u00ean, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u1eabn \u1edf m\u1ee9c 10\u2103, v\u00ec v\u1eady nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin b\u1eaft \u0111\u1ea7u gi\u1ea3m v\u00e0 \u0111i\u1ec7n \u00e1p c\u0169ng gi\u1ea3m.<\/span><\/span><\/p>\n

\u0110i\u1ec7n \u00e1p c\u1ee7a pin Lithium s\u1eaft phosphate thay \u0111\u1ed5i r\u1ea5t nhanh trong giai \u0111o\u1ea1n x\u1ea3 ban \u0111\u1ea7u v\u00e0 giai \u0111o\u1ea1n cu\u1ed1i c\u1ee7a qu\u00e1 tr\u00ecnh c\u1ea1n ki\u1ec7t dung l\u01b0\u1ee3ng pin, trong khi \u0111i\u1ec7n \u00e1p x\u1ea3 \u1edf giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh kh\u00f4ng thay \u0111\u1ed5i nhi\u1ec1u, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y pin c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi \u0111i\u1ec7n \u00e1p \u1edf giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh. T\u1eeb ph\u00e2n t\u00edch tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng th\u1eddi gian x\u1ea3 c\u1ee7a pin Lithium s\u1eaft phosphate s\u1ebd \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng gi\u1ea3m, cho th\u1ea5y kh\u1ea3 n\u0103ng x\u1ea3 c\u1ee7a pin Lithium s\u1eaft phosphate \u0111ang d\u1ea7n y\u1ebfu \u0111i. Th\u1eddi gian thu th\u1eadp c\u1ee7a pin x\u1ea3 ho\u00e0n to\u00e0n \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng l\u00e0 kho\u1ea3ng 270 l\u1ea7n, th\u1eddi gian thu th\u1eadp c\u1ee7a pin x\u1ea3 ho\u00e0n to\u00e0n \u1edf -10 \u2103 l\u00e0 kho\u1ea3ng 220 l\u1ea7n, th\u1eddi gian thu th\u1eadp c\u1ee7a pin x\u1ea3 ho\u00e0n to\u00e0n \u1edf -20 \u2103 l\u00e0 kho\u1ea3ng 100 l\u1ea7n v\u00e0 th\u1eddi gian thu th\u1eadp c\u1ee7a pin x\u1ea3 ho\u00e0n to\u00e0n \u1edf -30 \u2103 l\u00e0 kho\u1ea3ng 90 l\u1ea7n. Khi pin \u0111\u01b0\u1ee3c x\u1ea3 v\u1edbi d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i, Xu h\u01b0\u1edbng chung c\u1ee7a vi\u1ec7c gi\u1ea3m \u0111i\u1ec7n \u00e1p x\u1ea3 v\u1eabn kh\u00f4ng thay \u0111\u1ed5i.<\/span><\/span><\/p>\n

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

Pin Lithium s\u1eaft phosphate \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m. Ph\u00f2ng th\u1eed nghi\u1ec7m xen k\u1ebd nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 th\u1ea5p c\u1ee7a ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00f4 ph\u1ecfng m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u1edf Nam C\u1ef1c v\u00e0 c\u00e1c th\u00ed nghi\u1ec7m s\u1ea1c v\u00e0 x\u1ea3 pin Lithium s\u1eaft phosphate trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi ngu\u1ed3n \u0111i\u1ec7n DC \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh v\u00e0 m\u00e1y d\u00f2 dung l\u01b0\u1ee3ng pin. K\u1ebft lu\u1eadn \u0111\u01b0\u1ee3c \u0111\u01b0a ra l\u00e0 khi pin \u1edf trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, v\u1edbi nhi\u1ec7t \u0111\u1ed9 li\u00ean t\u1ee5c gi\u1ea3m, n\u1ec1n t\u1ea3ng \u0111i\u1ec7n \u00e1p x\u1ea3 ban \u0111\u1ea7u c\u1ee7a pin Lithium s\u1eaft phosphate gi\u1ea3m d\u1ea7n, th\u1eddi gian s\u1ea1c v\u00e0 x\u1ea3 gi\u1ea3m d\u1ea7n v\u00e0 dung l\u01b0\u1ee3ng s\u1ea1c v\u00e0 x\u1ea3 gi\u1ea3m.<\/span><\/span><\/p>\n

Nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn hi\u1ec7u su\u1ea5t s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin; Khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u1ee7a pin Lithium s\u1eaft phosphate l\u00e0 -10 \u2103 ho\u1eb7c th\u1ea5p h\u01a1n, m\u1ee9c s\u1ea1c c\u1ee7a pin v\u1edbi d\u00f2ng \u0111i\u1ec7n th\u1ea5p s\u1ebd cao h\u01a1n so v\u1edbi m\u1ee9c s\u1ea1c v\u1edbi d\u00f2ng \u0111i\u1ec7n cao. C\u00f3 th\u1ec3 th\u1ea5y t\u1eeb c\u00e1c k\u1ebft lu\u1eadn tr\u00ean r\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a pin Lithium s\u1eaft phosphate tr\u1edf n\u00ean k\u00e9m h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Kh\u1ea3 n\u0103ng s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin l\u00e0 \u0111\u00e1ng k\u1ec3 \u1edf -10 \u2103. Do \u0111\u00f3, khi s\u1eed d\u1ee5ng \u1edf Nam C\u1ef1c, c\u00f3 th\u1ec3 coi l\u00e0 l\u00e0m n\u00f3ng pin \u0111\u1ebfn kho\u1ea3ng -10 \u2103.<\/span><\/span><\/p>\n

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Pin lithium s\u1eaft phosphate l\u00e0 lo\u1ea1i pin lithium-ion r\u1ea5t c\u00f3 ti\u1ec1m n\u0103ng tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay. Hi\u1ec7n nay, nghi\u00ean c\u1ee9u v\u1ec1 pin lithium s\u1eaft phosphate ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd pin v\u00e0 \u01b0\u1edbc t\u00ednh tr\u1ea1ng th\u00e1i s\u1ea1c. Hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u th\u00eam, \u0111\u1eb7c bi\u1ec7t l\u00e0 hi\u1ec7u<\/p>\n","protected":false},"author":1,"featured_media":19689,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19688","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\/19688","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=19688"}],"version-history":[{"count":1,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19688\/revisions"}],"predecessor-version":[{"id":21982,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19688\/revisions\/21982"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19689"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}