{"id":19607,"date":"2024-01-25T05:53:47","date_gmt":"2024-01-25T05:53:47","guid":{"rendered":"http:\/\/dgbellvietnam.com\/lithium-power-battery-temperature-test\/"},"modified":"2024-10-21T15:59:51","modified_gmt":"2024-10-21T08:59:51","slug":"lithium-power-battery-temperature-test","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/lithium-power-battery-temperature-test\/","title":{"rendered":"Th\u1eed nghi\u1ec7m nhi\u1ec7t pin Lithium"},"content":{"rendered":"
\n

Pin lithium-ion c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m nh\u01b0 n\u0103ng l\u01b0\u1ee3ng ri\u00eang cao, c\u00f4ng su\u1ea5t ri\u00eang cao v\u00e0 n\u1ec1n t\u1ea3ng \u0111i\u1ec7n \u00e1p cao, c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng t\u1ed1t trong l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng v\u00e0 xe \u0111i\u1ec7n n\u0103ng l\u01b0\u1ee3ng m\u1edbi. C\u1ea5u tr\u00fac cell c\u1ee7a pin lithium-ion hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh c\u1ea5u tr\u00fac l\u1edbp v\u00e0 c\u1ea5u tr\u00fac qu\u1ea5n. So v\u1edbi c\u1ea5u tr\u00fac qu\u1ea5n, c\u1ea5u tr\u00fac x\u1ebfp ch\u1ed3ng c\u00f3 th\u1ec3 t\u0103ng dung l\u01b0\u1ee3ng pin v\u00e0 gi\u1ea3m \u0111i\u1ec7n tr\u1edf b\u00ean trong. Tuy nhi\u00ean, ph\u01b0\u01a1ng ph\u00e1p s\u1eafp x\u1ebfp n\u00e0y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng d\u1eabn \u0111\u1ebfn ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ec1u d\u1ecdc theo h\u01b0\u1edbng m\u1eb7t ph\u1eb3ng c\u1ee7a pin trong qu\u00e1 tr\u00ecnh x\u1ea3 t\u1ed1c \u0111\u1ed9 cao. \u0110\u1ec3 ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1 ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 pin kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp m\u1ed9t m\u00f4 h\u00ecnh m\u00f4 ph\u1ecfng pin ch\u00ednh x\u00e1c \u0111\u1ec3 l\u00e0m r\u00f5 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ph\u00e2n b\u1ed1 tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9, nh\u1eb1m cung c\u1ea5p cho c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t pin nhi\u1ec1u th\u00f4ng tin h\u01a1n v\u1ec1 vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a c\u1ea5u tr\u00fac pin.<\/span><\/span><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch m\u00f4 ph\u1ecfng nhi\u1ec1u tr\u01b0\u1eddng v\u1eadt l\u00fd trong pin. Trong m\u00f4 h\u00ecnh h\u00f3a, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u th\u01b0\u1eddng s\u1eed d\u1ee5ng m\u00f4 h\u00ecnh tham s\u1ed1 c\u1ee5c b\u1ed9 kh\u00f4ng ph\u00e2n l\u1edbp \u0111\u1ec3 ph\u00e2n t\u00edch ph\u00e2n b\u1ed1 tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin b\u1eb1ng c\u00e1ch gh\u00e9p n\u1ed1i m\u1ed9t m\u00f4 h\u00ecnh m\u1ed9t chi\u1ec1u. Ho\u1eb7c b\u1ecf qua \u0111\u1ed9 d\u1ed1c nhi\u1ec7t \u0111\u1ed9 theo h\u01b0\u1edbng \u0111\u1ed9 d\u00e0y c\u1ee7a pin v\u00e0 ch\u1ec9 ph\u00e2n t\u00edch ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a pin. Tr\u00ean th\u1ef1c t\u1ebf, pin lithium-ion c\u00f3 c\u1ea5u tr\u00fac ph\u00e2n l\u1edbp ba chi\u1ec1u v\u00e0 c\u00e1c ngu\u1ed3n nhi\u1ec7t kh\u00e1c nhau \u1edf c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c nhau, \u0111i\u1ec1u n\u00e0y t\u1ea5t y\u1ebfu d\u1eabn \u0111\u1ebfn ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u b\u00ean trong pin. \u0110\u1ec3 d\u1ef1 \u0111o\u00e1n ch\u00ednh x\u00e1c h\u01a1n s\u1ef1 ph\u00e2n b\u1ed1 \u0111i\u1ec7n h\u00f3a v\u00e0 tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a t\u1eebng l\u1edbp pin lithium-ion, b\u00e0i b\u00e1o n\u00e0y thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh gh\u00e9p n\u1ed1i nhi\u1ec7t \u0111i\u1ec7n h\u00f3a m\u1ed9t l\u1edbp ba chi\u1ec1u d\u1ef1a tr\u00ean ph\u1ea7n m\u1ec1m ph\u00e2n t\u00edch tr\u01b0\u1eddng v\u1eadt l\u00fd \u0111a l\u1edbp v\u00e0 nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 ph\u00e2n b\u1ed1 tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c nhau c\u1ee7a pin tr\u00ean c\u01a1 s\u1edf n\u00e0y. C\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u trong b\u00e0i vi\u1ebft n\u00e0y c\u00f3 th\u1ec3 cung c\u1ea5p c\u01a1 s\u1edf l\u00fd thuy\u1ebft cho vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a c\u1ea5u tr\u00fac c\u1ee7a pin lithium-ion v\u00e0 ph\u00e1t tri\u1ec3n qu\u1ea3n l\u00fd nhi\u1ec7t pin.<\/span><\/span><\/p>\n

1 M\u00f4 h\u00ecnh nhi\u1ec7t<\/span><\/span><\/strong><\/span><\/h1>\n

B\u00e0i vi\u1ebft n\u00e0y l\u1ea5y pin lithium-ion x\u1ebfp ch\u1ed3ng h\u00ecnh vu\u00f4ng l\u00e0m \u0111\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u. Pin bao g\u1ed3m 60 c\u1eb7p \u0111i\u1ec7n c\u1ef1c x\u1ebfp ch\u1ed3ng l\u00ean nhau, m\u1ed7i c\u1eb7p g\u1ed3m n\u0103m ph\u1ea7n: b\u1ed9 thu d\u00f2ng \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng, v\u1eadt li\u1ec7u ho\u1ea1t \u0111\u1ed9ng c\u1ef1c d\u01b0\u01a1ng, v\u1eadt li\u1ec7u ho\u1ea1t \u0111\u1ed9ng c\u1ef1c \u00e2m v\u00e0 b\u1ed9 thu d\u00f2ng \u0111i\u1ec7n c\u1ef1c \u00e2m. Trong qu\u00e1 tr\u00ecnh x\u1ea3, d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua tai \u0111i\u1ec7n c\u1ef1c \u00e2m, \u0111i qua m\u00e0ng ng\u0103n v\u00e0 \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m, v\u00e0 cu\u1ed1i c\u00f9ng ch\u1ea3y ra kh\u1ecfi tai \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng. Trong qu\u00e1 tr\u00ecnh n\u00e0y, c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc v\u00e0 \u0111i\u1ec7n h\u00f3a ph\u1ee9c t\u1ea1p v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n v\u1eadt li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c quan s\u00e1t, d\u1eabn \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i trong tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 b\u00ean trong c\u1ee7a pin. \u0110\u1ec3 \u1ee9ng ph\u00f3 v\u1edbi hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, b\u00e0i vi\u1ebft n\u00e0y thi\u1ebft l\u1eadp m\u1ed9t m\u00f4 h\u00ecnh gh\u00e9p nhi\u1ec7t \u0111i\u1ec7n h\u00f3a ba chi\u1ec1u b\u1eb1ng c\u00e1ch gh\u00e9p kh\u1ed1i l\u01b0\u1ee3ng, \u0111i\u1ec7n t\u00edch, b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9ng h\u1ecdc \u0111i\u1ec7n h\u00f3a. Nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n h\u00f3a v\u00e0 nhi\u1ec7t c\u1ee7a pin trong qu\u00e1 tr\u00ecnh x\u1ea3.<\/span><\/span><\/p>\n

2 Ki\u1ec3m tra<\/span><\/span><\/strong><\/span><\/h1>\n

Trong m\u00f4 h\u00ecnh ph\u00e2n ph\u1ed1i ba chi\u1ec1u, ch\u00fang t\u00f4i t\u1eadp trung v\u00e0o c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n ph\u1ed1i b\u00ean trong c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n h\u00f3a, bao g\u1ed3m ph\u00e2n ph\u1ed1i \u0111i\u1ec7n th\u1ebf, ph\u00e2n ph\u1ed1i SOC, ph\u00e2n ph\u1ed1i m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed3ng \u0111\u1ed9 ion lithium. Do kh\u00f3 kh\u0103n trong vi\u1ec7c \u0111o c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n ph\u1ed1i \u0111i\u1ec7n h\u00f3a c\u1ee7a pin th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m, b\u00e0i vi\u1ebft n\u00e0y x\u00e1c minh ch\u00fang b\u1eb1ng c\u00e1ch so s\u00e1nh c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m \u0111i\u1ec7n h\u00f3a b\u00ean ngo\u00e0i c\u1ee7a pin. N\u1ec1n t\u1ea3ng th\u1eed nghi\u1ec7m ch\u1ee7 y\u1ebfu bao g\u1ed3m <\/span><\/span>bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 th\u1ea5p DGBELL<\/span><\/span><\/a> , t\u1ee7 s\u1ea1c v\u00e0 x\u1ea3 v\u00e0 ph\u1ea7n m\u1ec1m m\u00f4 ph\u1ecfng tr\u01b0\u1eddng v\u1eadt l\u00fd \u0111a d\u1ea1ng. Tr\u01b0\u1edbc khi th\u1eed nghi\u1ec7m, h\u00e3y s\u1ea1c pin \u0111\u1ebfn khi s\u1ea1c \u0111\u1ea7y b\u1eb1ng d\u00f2ng \u0111i\u1ec7n 1 C v\u00e0 \u0111\u1ec3 y\u00ean trong 1 gi\u1edd. Sau \u0111\u00f3, th\u1ef1c hi\u1ec7n x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C v\u00e0 2 C tr\u00ean pin v\u00e0 ghi l\u1ea1i c\u00e1c thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p trong qu\u00e1 tr\u00ecnh x\u1ea3. Sau khi so s\u00e1nh k\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng v\u00e0 th\u1ef1c nghi\u1ec7m, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng t\u00ednh nh\u1ea5t qu\u00e1n gi\u1eefa k\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m v\u00e0 m\u00f4 ph\u1ecfng l\u00e0 t\u1ed1t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a m\u00f4 h\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh.<\/span><\/span><\/p>\n

2.1 Ph\u00e2n b\u1ed1 m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n<\/span><\/span><\/span><\/h2>\n

M\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ph\u00e2n b\u1ed1 tr\u00ean c\u00e1c c\u1ef1c thu d\u00f2ng \u0111i\u1ec7n d\u01b0\u01a1ng v\u00e0 \u00e2m c\u1ee7a pin khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh x\u1ea3 2 C. Trong qu\u00e1 tr\u00ecnh x\u1ea3, to\u00e0n b\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y t\u1eeb m\u1ea1ch ngo\u00e0i v\u00e0o tai \u0111i\u1ec7n c\u1ef1c \u00e2m v\u00e0 \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 kh\u1eafp v\u00f9ng thu d\u00f2ng \u0111i\u1ec7n \u00e2m. Khi kho\u1ea3ng c\u00e1ch t\u1eeb tai \u0111i\u1ec7n c\u1ef1c \u00e2m t\u0103ng l\u00ean, m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n gi\u1ea3m d\u1ea7n. \u0110i\u1ec1u n\u00e0y l\u00e0 do m\u1ed9t ph\u1ea7n d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o tai c\u1ef1c ch\u1ea3y vu\u00f4ng g\u00f3c v\u1edbi h\u01b0\u1edbng c\u1ee7a c\u1ea5u tr\u00fac b\u00e1nh sandwich. D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cell pin \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 d\u00f2ng \u0111i\u1ec7n l\u00e0m vi\u1ec7c c\u1ee5c b\u1ed9, d\u00f2ng \u0111i\u1ec7n n\u00e0y truy\u1ec1n c\u00e1c \u0111i\u1ec7n t\u00edch tham gia v\u00e0o ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a t\u1eeb \u0111i\u1ec7n c\u1ef1c \u00e2m sang \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng. Trong qu\u00e1 tr\u00ecnh pin ho\u1ea1t \u0111\u1ed9ng, s\u1ef1 ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u c\u1ee7a d\u00f2ng \u0111i\u1ec7n l\u00e0m vi\u1ec7c c\u1ee5c b\u1ed9 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn qu\u00e1 t\u1ea3i ho\u1eb7c x\u1ea3 c\u1ee5c b\u1ed9, do \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 an to\u00e0n v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a pin. Do \u0111\u00f3, vi\u1ec7c hi\u1ec3u th\u00f4ng s\u1ed1 ch\u00ednh n\u00e0y l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/span><\/span><\/p>\n

Trong qu\u00e1 tr\u00ecnh x\u1ea3, m\u1eadt \u0111\u1ed9 d\u00f2ng ph\u1ea3n \u1ee9ng \u1edf v\u00f9ng tai c\u1ef1c thay \u0111\u1ed5i t\u1eeb gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i sang gi\u00e1 tr\u1ecb c\u1ef1c ti\u1ec3u. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0 do trong qu\u00e1 tr\u00ecnh x\u1ea3 ch\u00f9m tia, c\u00e1c ion lithium trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n \u1edf v\u00f9ng tai c\u1ef1c g\u1ea7n nh\u01b0 c\u1ea1n ki\u1ec7t, do \u0111\u00f3 l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a g\u1ea7n tai c\u1ef1c. Khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh x\u1ea3, c\u00f3 m\u1ed9t gradient \u0111\u00e1ng k\u1ec3 trong m\u1eadt \u0111\u1ed9 d\u00f2ng ph\u1ea3n \u1ee9ng c\u1ee7a pin, c\u00f3 th\u1ec3 l\u00e0 do s\u1ef1 ph\u00e2n c\u1ef1c n\u1ed3ng \u0111\u1ed9 l\u1edbn c\u1ee7a pin \u1edf giai \u0111o\u1ea1n x\u1ea3 sau, d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e2n b\u1ed1 gradient \u0111\u00e1ng k\u1ec3 c\u1ee7a m\u1eadt \u0111\u1ed9 d\u00f2ng ph\u1ea3n \u1ee9ng. Tuy nhi\u00ean, trong qu\u00e1 tr\u00ecnh x\u1ea3, gradient c\u1ee7a m\u1eadt \u0111\u1ed9 d\u00f2ng ph\u1ea3n \u1ee9ng \u0111i\u1ec7n c\u1ef1c kh\u00f4ng \u0111\u00e1ng k\u1ec3, cho th\u1ea5y t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a b\u00ean trong \u0111i\u1ec7n c\u1ef1c v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 \u1ed5n \u0111\u1ecbnh.<\/span><\/span><\/p>\n

2.2 Ph\u00e2n ph\u1ed1i ti\u1ec1m n\u0103ng<\/span><\/span><\/span><\/h2>\n

S\u1ef1 \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a ph\u00e2n b\u1ed1 \u0111i\u1ec7n th\u1ebf \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a pin. \u0110i\u1ec7n th\u1ebf c\u1ee5c b\u1ed9 cao c\u1ee7a pin c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u nghi\u00eam tr\u1ecdng trong hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c t\u1ea5m pin, l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a pin. Trong qu\u00e1 tr\u00ecnh x\u1ea3 2C, s\u1ef1 ph\u00e2n b\u1ed1 \u0111i\u1ec7n th\u1ebf pha r\u1eafn c\u1ee7a anot v\u00e0 catot ch\u1ec9 ra s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a s\u1ef1 ph\u00e2n b\u1ed1 gradient \u0111i\u1ec7n \u00e1p \u0111\u00e1ng k\u1ec3 trong qu\u00e1 tr\u00ecnh x\u1ea3. Trong qu\u00e1 tr\u00ecnh x\u1ea3, d\u00f2ng \u0111i\u1ec7n ch\u1ea3y v\u00e0o pin t\u1eeb \u0111i\u1ec7n c\u1ef1c \u00e2m v\u00e0 sau \u0111\u00f3 ch\u1ea3y ra kh\u1ecfi \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng. Theo \u0111\u1ecbnh lu\u1eadt Ohm, \u0111i\u1ec7n th\u1ebf gi\u1ea3m theo h\u01b0\u1edbng c\u1ee7a d\u00f2ng \u0111i\u1ec7n. Do \u0111\u00f3, \u0111i\u1ec7n th\u1ebf cao nh\u1ea5t c\u1ee7a anot n\u1eb1m \u1edf tai \u0111i\u1ec7n c\u1ef1c \u00e2m, trong khi \u0111i\u1ec7n th\u1ebf th\u1ea5p nh\u1ea5t c\u1ee7a catot n\u1eb1m \u1edf tai \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng. Ngo\u00e0i ra, do s\u1ef1 t\u00edch t\u1ee5 c\u1ee7a d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o ho\u1eb7c ra kh\u1ecfi pin t\u1ea1i c\u00e1c tai \u0111i\u1ec7n c\u1ef1c, s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n th\u1ebf trong v\u00f9ng k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c tai \u0111i\u1ec7n c\u1ef1c v\u00e0 t\u1ea5m \u0111i\u1ec7n c\u1ef1c r\u1ea5t kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 \u0111i\u1ec7n th\u1ebf \u1edf c\u00e1c ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a t\u1ea5m \u0111i\u1ec7n c\u1ef1c t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u.<\/span><\/span><\/p>\n

2.3 Ph\u00e2n t\u00edch \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9<\/span><\/span><\/span><\/h2>\n

Qu\u00e1 tr\u00ecnh x\u1ea3 c\u1ee7a pin lithium-ion l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh d\u1eabn nhi\u1ec7t t\u1ea1m th\u1eddi \u0111i\u1ec3n h\u00ecnh \u0111\u00f4i khi thay \u0111\u1ed5i t\u1eeb ngu\u1ed3n nhi\u1ec7t b\u00ean trong. Ph\u00e2n b\u1ed1 tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin v\u1edbi \u0111\u1ed9 s\u00e2u x\u1ea3 kh\u00e1c nhau trong \u0111i\u1ec1u ki\u1ec7n x\u1ea3 2 C. Trong qu\u00e1 tr\u00ecnh x\u1ea3, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin li\u00ean t\u1ee5c t\u0103ng. Tuy nhi\u00ean, t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin kh\u00f4ng gi\u1ed1ng nhau \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau. Trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh x\u1ea3, t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 g\u1ea7n v\u00f9ng tai c\u1ef1c cao h\u01a1n, trong khi t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 xa v\u00f9ng tai c\u1ef1c th\u1ea5p h\u01a1n.<\/span><\/span><\/p>\n

Khi qu\u00e1 tr\u00ecnh x\u1ea3 s\u00e2u h\u01a1n, t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 ra kh\u1ecfi tai \u0111i\u1ec7n c\u1ef1c t\u0103ng l\u00ean, c\u00f3 th\u1ec3 l\u00e0 do s\u1ef1 c\u1ea1n ki\u1ec7t c\u00e1c ion lithium t\u1ea1i tai \u0111i\u1ec7n c\u1ef1c trong giai \u0111o\u1ea1n x\u1ea3 sau, d\u1eabn \u0111\u1ebfn gi\u1ea3m m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ph\u1ea3n \u1ee9ng trong v\u00f9ng tai \u0111i\u1ec7n c\u1ef1c v\u00e0 gi\u1ea3m t\u1ed1c \u0111\u1ed9 sinh nhi\u1ec7t Ohmic. Tuy nhi\u00ean, \u1edf v\u00f9ng \u0111\u00e1y c\u1ee7a pin, do m\u1ee9c ti\u00eau th\u1ee5 l\u01b0u l\u01b0\u1ee3ng th\u1ea5p trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh x\u1ea3 ion lithium, n\u00ean h\u00e0m l\u01b0\u1ee3ng ion lithium t\u01b0\u01a1ng \u0111\u1ed1i d\u1ed3i d\u00e0o trong giai \u0111o\u1ea1n x\u1ea3 sau v\u00e0 s\u1ed1 l\u01b0\u1ee3ng ion lithium tham gia ph\u1ea3n \u1ee9ng t\u0103ng \u0111\u00e1ng k\u1ec3, d\u1eabn \u0111\u1ebfn t\u0103ng m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a ph\u1ea3n \u1ee9ng \u0111\u00e1y pin v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 sinh nhi\u1ec7t Ohmic trong giai \u0111o\u1ea1n x\u1ea3 sau. Trong qu\u00e1 tr\u00ecnh x\u1ea3, m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ph\u1ea3n \u1ee9ng trong v\u00f9ng \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng \u0111\u00e3 thay \u0111\u1ed5i t\u1eeb gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i sang gi\u00e1 tr\u1ecb c\u1ef1c ti\u1ec3u, ch\u1ee9ng minh th\u00eam cho k\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng.<\/span><\/span><\/p>\n

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

B\u00e0i b\u00e1o n\u00e0y \u0111\u1ec1 xu\u1ea5t m\u1ed9t m\u00f4 h\u00ecnh gh\u00e9p n\u1ed1i \u0111i\u1ec7n h\u00f3a ba chi\u1ec1u b\u1eb1ng c\u00e1ch gh\u00e9p n\u1ed1i kh\u1ed1i l\u01b0\u1ee3ng, \u0111i\u1ec7n t\u00edch, n\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ed9ng h\u1ecdc \u0111i\u1ec7n h\u00f3a. S\u1eed d\u1ee5ng m\u00f4 h\u00ecnh n\u00e0y, s\u1ef1 ph\u00e2n b\u1ed1 kh\u00f4ng gian-th\u1eddi gian c\u1ee7a c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m nhi\u1ec7t c\u1ee7a pin lithium-ion x\u1ebfp ch\u1ed3ng \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u. C\u00e1c k\u1ebft lu\u1eadn ch\u00ednh nh\u01b0 sau:<\/span><\/span><\/p>\n

(1) Ph\u00e2n t\u00edch ch\u00ednh x\u00e1c c\u00e1c thay \u0111\u1ed5i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m sinh nhi\u1ec7t c\u1ee7a pin ion tuy\u1ebft t\u00f9ng gh\u00e9p nhi\u1ec7t ba chi\u1ec1u v\u00e0 \u0111i\u1ec7n h\u00f3a ba chi\u1ec1u.<\/span><\/span><\/p>\n

(2) B\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh li\u00ean k\u1ebft nhi\u1ec7t \u0111i\u1ec7n h\u00f3a ba chi\u1ec1u, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c nghi\u1ec7m truy\u1ec1n th\u1ed1ng c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 kh\u00f3 thu \u0111\u01b0\u1ee3c nh\u01b0 ph\u00e2n b\u1ed1 \u0111i\u1ec7n th\u1ebf c\u1ee5c b\u1ed9 v\u00e0 ph\u00e2n b\u1ed1 m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a pin<\/span><\/span><\/p>\n

(3) Trong qu\u00e1 tr\u00ecnh x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i, c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 \u0111\u00e1ng k\u1ec3 b\u00ean trong pin, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf v\u00f9ng chuy\u1ec3n ti\u1ebfp gi\u1eefa tai v\u00e0 t\u1ea5m, n\u01a1i c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i nhi\u1ec1u nh\u1ea5t.<\/span><\/span><\/p>\n

(4) T\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau trong qu\u00e1 tr\u00ecnh x\u1ea3 kh\u00f4ng gi\u1ed1ng nhau. Trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh x\u1ea3, t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 \u1edf v\u00f9ng tai c\u1ef1c l\u00e0 cao nh\u1ea5t, trong khi t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 \u1edf v\u00f9ng \u0111\u00e1y c\u1ee7a pin xa tai c\u1ef1c t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf. Tuy nhi\u00ean, c\u00f3 xu h\u01b0\u1edbng t\u0103ng l\u00ean \u1edf giai \u0111o\u1ea1n x\u1ea3 sau. M\u00f4 h\u00ecnh nhi\u1ec7t \u0111i\u1ec7n h\u00f3a ba chi\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong b\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 \u0111\u1ec3 quan s\u00e1t h\u00e0nh vi nhi\u1ec7t v\u00e0 \u0111i\u1ec7n h\u00f3a b\u00ean trong c\u1ee7a pin lithium-ion v\u00e0 c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng t\u1ed1t trong vi\u1ec7c h\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf t\u1ed1i \u01b0u h\u00f3a c\u1ea5u tr\u00fac monome pin lithium<\/span><\/span><\/p>\n

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

Pin lithium-ion c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m nh\u01b0 n\u0103ng l\u01b0\u1ee3ng ri\u00eang cao, c\u00f4ng su\u1ea5t ri\u00eang cao v\u00e0 n\u1ec1n t\u1ea3ng \u0111i\u1ec7n \u00e1p cao, c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng t\u1ed1t trong l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng v\u00e0 xe \u0111i\u1ec7n n\u0103ng l\u01b0\u1ee3ng m\u1edbi. C\u1ea5u tr\u00fac cell c\u1ee7a pin lithium-ion hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh c\u1ea5u tr\u00fac l\u1edbp v\u00e0<\/p>\n","protected":false},"author":1,"featured_media":19608,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19607","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\/19607","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=19607"}],"version-history":[{"count":1,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19607\/revisions"}],"predecessor-version":[{"id":21935,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19607\/revisions\/21935"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19608"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}