{"id":24309,"date":"2023-12-07T02:38:43","date_gmt":"2023-12-06T19:38:43","guid":{"rendered":"https:\/\/dgbellvietnam.com\/thu-nghiem-dien-tro-pin-li-ion-hang-khong\/"},"modified":"2023-12-07T02:38:43","modified_gmt":"2023-12-06T19:38:43","slug":"thu-nghiem-dien-tro-pin-li-ion-hang-khong","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/thu-nghiem-dien-tro-pin-li-ion-hang-khong\/","title":{"rendered":"Th\u1eed nghi\u1ec7m \u0111i\u1ec7n tr\u1edf pin Li-ion h\u00e0ng kh\u00f4ng"},"content":{"rendered":"
\n

L\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a t\u00e0u v\u0169 tr\u1ee5, pin lithium-ion oxit coban cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed. Hi\u1ec7u su\u1ea5t c\u1ee7a pin lithium-ion \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ef1 an to\u00e0n, \u0111\u1ed9 m\u01b0\u1ee3t m\u00e0 v\u00e0 t\u00ednh kinh t\u1ebf c\u1ee7a ho\u1ea1t \u0111\u1ed9ng t\u00e0u v\u0169 tr\u1ee5. C\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t pin trong \u0111i\u1ec1u ki\u1ec7n h\u00e0ng kh\u00f4ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh ba \u0111i\u1ec3m: \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 t\u1ed1t, n\u0103ng l\u01b0\u1ee3ng ri\u00eang cao v\u00e0 tu\u1ed5i th\u1ecd chu k\u1ef3 d\u00e0i. So v\u1edbi c\u00e1c lo\u1ea1i pin lithium truy\u1ec1n th\u1ed1ng kh\u00e1c, pin ion coban c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m nh\u01b0 ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh, n\u0103ng l\u01b0\u1ee3ng ri\u00eang cao v\u00e0 nhi\u1ec1u chu k\u1ef3, \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t nh\u01b0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5. <\/span><\/span><\/p>\n

K\u00edch th\u01b0\u1edbc \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp dung l\u01b0\u1ee3ng c\u1ee7a pin, \u0111\u1ed3ng th\u1eddi \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin c\u0169ng quy\u1ebft \u0111\u1ecbnh hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a pin. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng pin th\u1ef1c t\u1ebf, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion li\u00ean t\u1ee5c thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u ki\u1ec7n SOC kh\u00e1c nhau. Trong nghi\u00ean c\u1ee9u th\u1ef1c t\u1ebf, k\u1ebft h\u1ee3p \u0111\u01b0\u1eddng cong bi\u1ebfn thi\u00ean \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin c\u00f3 th\u1ec3 \u01b0\u1edbc t\u00ednh ch\u00ednh x\u00e1c h\u01a1n SOC th\u1ef1c t\u1ebf c\u1ee7a pin. <\/span><\/span><\/p>\n

Qua th\u1eed nghi\u1ec7m th\u1ef1c nghi\u1ec7m, ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, \u0111i\u1ec7n tr\u1edf \u00f4mi v\u00e0 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin s\u1eaft photphat t\u0103ng d\u1ea7n trong qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3. Nhi\u1ec7t \u0111\u1ed9 l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin. Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn dung l\u01b0\u1ee3ng c\u1ee7a pin lithium s\u1eaft photphat. \u1ede nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, dung l\u01b0\u1ee3ng gi\u1ea3m nhanh, trong khi \u1edf nhi\u1ec7t \u0111\u1ed9 cao, dung l\u01b0\u1ee3ng t\u0103ng nhanh. Tuy nhi\u00ean, t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i ch\u1eadm h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. <\/span><\/span><\/p>\n

Xem x\u00e9t t\u00ednh an to\u00e0n c\u1ee7a pin h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 \u0111ang s\u1eed d\u1ee5ng v\u00e0 vi\u1ec7c thi\u1ebfu c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion oxit coban c\u1ee7a c\u00e1c h\u1ecdc gi\u1ea3, vi\u1ec7c th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin lithium-ion h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 l\u00e0 c\u1ea7n thi\u1ebft. B\u00e0i vi\u1ebft n\u00e0y s\u1eed d\u1ee5ng 0-50 \u2103 \u0111\u1ec3 ti\u1ebfn h\u00e0nh c\u00e1c th\u1eed nghi\u1ec7m \u0111i\u1ec7n tr\u1edf b\u00ean trong tr\u00ean pin lithium-ion oxit coban v\u00e0 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p HPPC (\u0110\u1eb7c t\u00ednh c\u00f4ng su\u1ea5t xung lai) \u0111\u1ec3 th\u1eed nghi\u1ec7m pin 45 Ah ICP 45 \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 tr\u1ea1ng th\u00e1i SOC kh\u00e1c nhau. Nh\u1eefng thay \u0111\u1ed5i v\u1ec1 \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium-ion oxit coban \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 SOC kh\u00e1c nhau \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u chi ti\u1ebft. <\/span><\/span><\/p>\n

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

1.1 \u0110\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m v\u00e0 thi\u1ebft b\u1ecb<\/span><\/span><\/span><\/h2>\n

Pin th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 pin lithium-ion oxit coban ICP 45. Dung l\u01b0\u1ee3ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a pin l\u00e0 45 Ah v\u00e0 v\u1eadt li\u1ec7u \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng l\u00e0 oxit lithium coban. Thi\u1ebft b\u1ecb s\u1ea1c v\u00e0 x\u1ea3 pin. H\u1ed9p nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i s\u1eed d\u1ee5ng <\/span><\/span>bu\u1ed3ng th\u1eed \u0111\u1ed9 \u1ea9m nhi\u1ec7t \u0111\u1ed9 DGBELL.<\/span><\/span><\/a><\/p>\n

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1.2 Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n \u0111i\u1ec7n tr\u1edf trong v\u00e0 th\u1eed nghi\u1ec7m HPPC<\/span><\/span><\/span><\/h2>\n

C\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium, bao g\u1ed3m ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh volt ampe, ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n \u00e1p m\u1ea1ch h\u1edf, ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7c t\u00ednh c\u00f4ng su\u1ea5t xung h\u1ed7n h\u1ee3p (HPPC) v\u00e0 ph\u01b0\u01a1ng ph\u00e1p tr\u1edf kh\u00e1ng AC. B\u00e0i vi\u1ebft n\u00e0y s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p HPPC \u0111\u1ec3 ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf c\u1ee7a pin lithium, \u0111\u01b0\u1ee3c ghi l\u1ea1i trong d\u1ef1 \u00e1n Freedom CAR \u201cPower Assisted Hybrid Vehicle Power Battery Test Manual\u201d t\u1ea1i Hoa K\u1ef3. So v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n \u0111i\u1ec7n tr\u1edf b\u00ean trong kh\u00e1c, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m \u0111\u00e1ng k\u1ec3 v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 ph\u00e1t hi\u1ec7n. Ph\u01b0\u01a1ng ph\u00e1p HPPC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c v\u00e0 \u0111i\u1ec7n tr\u1edf Ohmic c\u1ee7a pin \u1edf nhi\u1ec1u tr\u1ea1ng th\u00e1i kh\u00e1c nhau. <\/span><\/span><\/p>\n

\u0110\u1ea7u ti\u00ean, m\u1ed9t d\u00f2ng xung x\u1ea3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u1edf c\u1ea3 hai \u0111\u1ea7u c\u1ee7a pin v\u00e0 \u0111i\u1ec7n \u00e1p gi\u1ea3m xu\u1ed1ng U 1 t\u1ea1i th\u1eddi \u0111i\u1ec3m t\u1ea3i xung, sau \u0111\u00f3 xu h\u01b0\u1edbng gi\u1ea3m ch\u1eadm l\u1ea1i. Sau khi d\u00f2ng \u0111i\u1ec7n ti\u1ebfp t\u1ee5c trong 10 gi\u00e2y, t\u1ea3i xung b\u1ecb h\u1ee7y t\u1ea1i th\u1eddi \u0111i\u1ec3m t 2 v\u00e0 \u0111i\u1ec7n \u00e1p ngay l\u1eadp t\u1ee9c ph\u1ee5c h\u1ed3i v\u1ec1 U 3. Sau khi ch\u1edd 40 gi\u00e2y, \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh \u1edf U 4. Qu\u00e1 tr\u00ecnh b\u01b0\u1edbc t\u1eeb U 2 \u0111\u1ebfn U 3 b\u1eaft ngu\u1ed3n t\u1eeb \u0111i\u1ec7n tr\u1edf Ohmic b\u00ean trong c\u1ee7a pin, trong khi qu\u00e1 tr\u00ecnh d\u1ea7n d\u1ea7n t\u1eeb U 3 \u0111\u1ebfn U 4 l\u00e0 s\u1ef1 suy gi\u1ea3m \u0111i\u1ec7n \u00e1p \u1edf c\u1ea3 hai ph\u00eda c\u1ee7a \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c v\u00e0 \u0111i\u1ec7n \u00e1p c\u00f3 xu h\u01b0\u1edbng \u1ed5n \u0111\u1ecbnh \u1edf U 4. HPPC t\u00ednh to\u00e1n \u0111i\u1ec7n tr\u1edf Ohmic v\u00e0 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin b\u1eb1ng c\u00e1ch ki\u1ec3m tra c\u00e1c thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a t\u1ea3i d\u00f2ng \u0111i\u1ec7n. B\u1eb1ng c\u00e1ch \u0111o \u0111i\u1ec7n \u00e1p trong th\u00ed nghi\u1ec7m x\u1ea3, h\u00e3y t\u00ednh \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 \u1edf c\u00e1c tr\u1ea1ng th\u00e1i s\u1ea1c kh\u00e1c nhau. <\/span><\/span><\/p>\n

1.3 C\u00e1c b\u01b0\u1edbc ki\u1ec3m tra<\/span><\/span><\/span><\/h2>\n

B\u01b0\u1edbc 1: K\u00edch ho\u1ea1t pin lithium coban oxit th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m s\u1ea1c v\u00e0 x\u1ea3 tu\u1ea7n ho\u00e0n. \u0110i\u1ec7n \u00e1p gi\u1edbi h\u1ea1n tr\u00ean c\u1ee7a ICP 45 l\u00e0 4,15 V v\u00e0 \u0111i\u1ec7n \u00e1p ngo\u1ea1i tuy\u1ebfn l\u00e0 3,0 V. S\u1ea1c v\u00e0 x\u1ea3 tu\u1ea7n ho\u00e0n ba l\u1ea7n, s\u1ea1c \u1edf t\u1ed1c \u0111\u1ed9 0,2 C v\u00e0 x\u1ea3 \u1edf t\u1ed1c \u0111\u1ed9 0,1 C. Sau m\u1ed7i l\u1ea7n s\u1ea1c ho\u1eb7c x\u1ea3, \u0111\u1ec3 y\u00ean trong 12 gi\u1edd; <\/span><\/span><\/p>\n

B\u01b0\u1edbc 2: B\u1eaft \u0111\u1ea7u x\u1ea3 100% SOC ICP 45 pin \u1edf t\u1ed1c \u0111\u1ed9 0,5 C v\u00e0 ghi l\u1ea1i th\u1eddi gian x\u1ea3. Sau khi x\u1ea3 trong 12 ph\u00fat (90% SOC c\u00f2n l\u1ea1i c\u1ee7a pin \u0111\u01b0\u1ee3c \u0111\u1ec3 y\u00ean trong 1 gi\u1edd), b\u1eaft \u0111\u1ea7u th\u1eed nghi\u1ec7m \u0111\u1eb7c t\u00ednh c\u00f4ng su\u1ea5t xung h\u1ed7n h\u1ee3p v\u00e0 ghi l\u1ea1i \u0111i\u1ec7n \u00e1p m\u1ea1ch h\u1edf, d\u00f2ng \u0111i\u1ec7n x\u1ea3 OCV v\u00e0 th\u1eddi gian; <\/span><\/span><\/p>\n

B\u01b0\u1edbc 3: L\u1eb7p l\u1ea1i c\u00e1c b\u01b0\u1edbc c\u1ee7a b\u01b0\u1edbc th\u1ee9 hai, ghi l\u1ea1i \u0111i\u1ec7n \u00e1p m\u1ea1ch h\u1edf v\u00e0 d\u00f2ng \u0111i\u1ec7n x\u1ea3 c\u1ee7a pin \u1edf 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10% v\u00e0 0% \u1edf c\u00e1c SOC kh\u00e1c nhau v\u00e0 t\u00ednh to\u00e1n \u0111i\u1ec7n tr\u1edf \u00f4mi v\u00e0 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c; B\u01b0\u1edbc 4: T\u1eaft t\u1ea3i \u0111i\u1ec7n t\u1eed v\u00e0 ngu\u1ed3n s\u1ea1c, ng\u1eaft k\u1ebft n\u1ed1i r\u01a1le v\u00e0 xu\u1ea5t d\u1eef li\u1ec7u v\u00e0o b\u1ea3ng t\u00ednh Excel.<\/span><\/span><\/p>\n

2 K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m v\u00e0 ph\u00e2n t\u00edch<\/span><\/span><\/strong><\/span><\/h1>\n

2.1 Ph\u00e2n t\u00edch \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n tr\u1edf n\u1ed9i Ohmic<\/span><\/span><\/span><\/h2>\n

\u0110i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin lithium coban oxit bao g\u1ed3m \u0110i\u1ec7n tr\u1edf b\u00ean trong Ohmic v\u00e0 \u0110i\u1ec7n tr\u1edf b\u00ean trong ph\u00e2n c\u1ef1c. Th\u00f4ng qua ph\u00e2n t\u00edch d\u1eef li\u1ec7u th\u1ef1c nghi\u1ec7m, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, \u0111i\u1ec7n tr\u1edf b\u00ean trong Ohmic li\u00ean t\u1ee5c t\u0103ng. L\u00fd do ch\u00ednh l\u00e0 \u0111i\u1ec7n tr\u1edf b\u00ean trong Ohmic c\u1ee7a pin lithium-ion oxit coban ch\u1ee7 y\u1ebfu bao g\u1ed3m ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, \u0111\u1ea7u n\u1ed1i \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m. Khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng th\u1ea5p, \u0111\u1ed9 h\u00f2a tan c\u1ee7a c\u00e1c ion lithium trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n b\u00ean trong pin lithium-ion oxit coban gi\u1ea3m nhanh ch\u00f3ng, khi\u1ebfn c\u00e1c ion lithium k\u1ebft t\u1ee7a trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, l\u00e0m gi\u1ea3m n\u1ed3ng \u0111\u1ed9 c\u00e1c ion lithium tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb th\u1ec3 t\u00edch, l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion lithium trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n v\u00e0 l\u00e0m t\u0103ng \u0111i\u1ec7n tr\u1edf b\u00ean trong ohmic c\u1ee7a pin. <\/span><\/span><\/p>\n

Ch\u00fang t\u00f4i \u0111\u00e3 so s\u00e1nh c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m bi\u1ebfn thi\u00ean c\u1ee7a \u0111i\u1ec7n tr\u1edf trong Ohmic v\u1edbi SOC \u1edf 0, 10, 20, 30 \u2103 v\u00e0 50 \u2103 v\u00e0 th\u1ea5y r\u1eb1ng SOC c\u1ee7a pin lithium-ion oxit coban thay \u0111\u1ed5i ch\u1eadm trong ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng (20%, 100%) \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng tr\u00ean 20 \u2103. V\u00ed d\u1ee5, trong \u0111i\u1ec1u ki\u1ec7n 30 \u2103, \u0111i\u1ec7n tr\u1edf trong Ohmic c\u1ee7a pin lithium-ion oxit coban v\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf m\u1ee9c 0,7 m \u03a9 trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng. Do \u0111\u00f3, \u0111i\u1ec7n tr\u1edf trong Ohmic c\u1ee7a pin trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 n\u00e0y \u1edf SOC (20%, 100%) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1. <\/span><\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf trong Ohmic c\u1ef1c k\u1ef3 nh\u1ea1y c\u1ea3m v\u1edbi nh\u1eefng thay \u0111\u1ed5i v\u1ec1 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 khi nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 10 \u2103, \u0111i\u1ec7n tr\u1edf trong Ohmic c\u1ee7a pin thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 theo SOC c\u1ee7a pin. Khi SOC c\u1ee7a pin \u1edf tr\u1ea1ng th\u00e1i cao, chuy\u1ec3n \u0111\u1ed9ng ion b\u00ean trong pin ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh h\u01a1n, b\u00f9 \u0111\u1eafp cho s\u1ef1 gi\u1ea3m ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ea5t \u0111i\u1ec7n ph\u00e2n v\u00e0 c\u00f3 t\u00e1c \u0111\u1ed9ng nh\u1ecf h\u01a1n \u0111\u1ebfn \u0111i\u1ec7n tr\u1edf Ohmic. Nh\u01b0ng khi SOC c\u1ee7a pin gi\u1ea3m, n\u0103ng l\u01b0\u1ee3ng ion b\u00ean trong pin c\u0169ng gi\u1ea3m, d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n tr\u1edf Ohmic t\u0103ng nhanh. Th\u00f4ng qua hai \u0111\u01b0\u1eddng cong 10 \u2103 v\u00e0 0 \u2103, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, \u0111i\u1ec7n tr\u1edf trong Ohmic t\u0103ng v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh h\u01a1n khi SOC c\u1ee7a pin t\u0103ng. <\/span><\/span><\/p>\n

2.2 Ph\u00e2n t\u00edch \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c b\u00ean trong v\u00e0 \u0111i\u1ec7n tr\u1edf t\u1ed5ng b\u00ean trong<\/span><\/span><\/span><\/h2>\n

Ch\u00fang ta c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin ch\u1ee7 y\u1ebfu b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t \u0111\u1ed9, li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n n\u1ed3ng \u0111\u1ed9 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. \u1ede 0 \u2103, \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin g\u1ea7n g\u1ea5p ba l\u1ea7n so v\u1edbi 50 \u2103 trong c\u00f9ng \u0111i\u1ec1u ki\u1ec7n. \u1ede c\u00f9ng nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin thay \u0111\u1ed5i r\u1ea5t \u00edt, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi SOC n\u1eb1m trong ph\u1ea1m vi (20%, 90%) v\u00e0 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb kh\u00f4ng \u0111\u1ed5i. <\/span><\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin lithium-ion oxit coban t\u0103ng theo s\u1ef1 gi\u1ea3m c\u1ee7a SOC pin trong ph\u1ea1m vi (0%, 20%). \u0110i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c b\u00ean trong c\u1ee7a pin lithium-ion oxit coban t\u0103ng theo s\u1ef1 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9. \u0110i\u1ec1u n\u00e0y l\u00e0 do ho\u1ea1t \u0111\u1ed9ng c\u1ee7a lithium ph\u00e2n ly \u1edf h\u1ea1 l\u01b0u c\u1ee7a pin lithium-ion oxit coban gi\u1ea3m \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, khi\u1ebfn vi\u1ec7c kh\u1eed xen k\u1ebd \u1edf \u0111i\u1ec7n c\u1ef1c \u00e2m tr\u1edf n\u00ean kh\u00f3 kh\u0103n, d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c b\u00ean trong c\u1ee7a pin t\u0103ng. Khi nhi\u1ec7t \u0111\u1ed9 cao, n\u0103ng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c ion lithium trong \u0111i\u1ec7n c\u1ef1c \u00e2m c\u1ee7a pin cao, l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion <\/span><\/span><\/p>\n

\u1ede SOC t\u1eeb 0% \u0111\u1ebfn 20%, \u0111i\u1ec7n tr\u1edf ohmic v\u00e0 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin lithium ion t\u0103ng d\u1ea7n khi SOC gi\u1ea3m. Tuy nhi\u00ean, s\u1ef1 gia t\u0103ng \u0111i\u1ec7n tr\u1edf b\u00ean trong Ohmic khi SOC gi\u1ea3m l\u1edbn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi \u0111i\u1ec7n tr\u1edf b\u00ean trong ph\u00e2n c\u1ef1c, cho th\u1ea5y \u0111i\u1ec7n tr\u1edf b\u00ean trong Ohmic nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi SOC c\u1ee7a pin. Trong c\u00f9ng tr\u1ea1ng th\u00e1i SOC, c\u1ea3 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c v\u00e0 \u0111i\u1ec7n tr\u1edf Ohmic \u0111\u1ec1u t\u0103ng d\u1ea7n khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m. Th\u00f4ng qua ph\u00e2n t\u00edch d\u1eef li\u1ec7u, ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng bi\u00ean \u0111\u1ed9 c\u1ee7a \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m l\u1edbn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi \u0111i\u1ec7n tr\u1edf Ohmic, cho th\u1ea5y \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. <\/span><\/span><\/p>\n

Khi nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c b\u00ean trong c\u1ee7a pin t\u01b0\u01a1ng \u0111\u1ed1i cao, nh\u01b0ng ch\u1ec9 chi\u1ebfm m\u1ed9t ph\u1ea7n t\u01b0 t\u1ed5ng \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin, v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ed1i v\u1edbi dung l\u01b0\u1ee3ng v\u00e0 hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a pin t\u01b0\u01a1ng \u0111\u1ed1i h\u1ea1n ch\u1ebf. M\u1eb7c d\u00f9 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin t\u0103ng h\u01a1n g\u1ea5p \u0111\u00f4i \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p so v\u1edbi nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, nh\u01b0ng so v\u1edbi c\u00e1c \u0111i\u1ec7n tr\u1edf kh\u00e1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 pin lithium s\u1eaft phosphate ho\u1eb7c pin axit ch\u00ec, \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin lithium s\u1eaft oxit coban v\u1eabn c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 t\u1ed1t. <\/span><\/span><\/p>\n

Qua ph\u00e2n t\u00edch m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin v\u00e0 SOC, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng trong ph\u1ea1m vi SOC (0%, 20%), t\u1ed5ng \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin s\u1ebd t\u0103ng khi SOC c\u1ee7a pin gi\u1ea3m. \u0110i\u1ec7n tr\u1edf trong cao s\u1ebd d\u1eabn \u0111\u1ebfn t\u0103ng nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra c\u1ee7a pin v\u00e0 r\u00fat ng\u1eafn tu\u1ed5i th\u1ecd c\u1ee7a pin. S\u1eed d\u1ee5ng kh\u00f4ng \u0111\u00fang c\u00e1ch s\u1ebd khi\u1ebfn pin x\u1ea3 qu\u00e1 m\u1ee9c v\u00e0 kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c. Do \u0111\u00f3, \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a pin, n\u00ean gi\u1eef pin ho\u1ea1t \u0111\u1ed9ng trong ph\u1ea1m vi SOC t\u1eeb 30% \u0111\u1ebfn 100%. <\/span><\/span><\/p>\n

Qua ph\u00e2n t\u00edch m\u1ed1i quan h\u1ec7 gi\u1eefa nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin s\u1ebd t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, v\u00e0 \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin t\u0103ng s\u1ebd d\u1eabn \u0111\u1ebfn gi\u1ea3m dung l\u01b0\u1ee3ng pin. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t c\u1ee7a pin, n\u00ean gi\u1eef pin ho\u1ea1t \u0111\u1ed9ng tr\u00ean 10 \u2103 c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t. Khi nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 10 \u2103, \u0111\u1ec3 tr\u00e1nh t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a pin, c\u1ea7n ph\u1ea3i l\u00e0m n\u00f3ng b\u1ed9 pin tr\u01b0\u1edbc khi kh\u1edfi \u0111\u1ed9ng pin. V\u00ec pin sinh nhi\u1ec7t trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng n\u00ean kh\u00f4ng c\u1ea7n ph\u1ea3i l\u00e0m n\u00f3ng pin trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng. <\/span><\/span><\/p>\n

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

B\u00e0i vi\u1ebft n\u00e0y ti\u1ebfn h\u00e0nh c\u00e1c th\u00ed nghi\u1ec7m tr\u00ean pin lithium coban oxit h\u00e0ng kh\u00f4ng, ph\u00e2n t\u00edch nh\u1eefng thay \u0111\u1ed5i v\u1ec1 \u0110i\u1ec7n tr\u1edf n\u1ed9i Ohmic v\u00e0 Ph\u00e2n c\u1ef1c c\u1ee7a pin \u1edf c\u00e1c SOC v\u00e0 nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, v\u00e0 t\u00f3m t\u1eaft l\u00fd do cho nh\u1eefng thay \u0111\u1ed5i t\u01b0\u01a1ng \u1ee9ng. \u0110i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c v\u00e0 \u0111i\u1ec7n tr\u1edf ohm c\u1ee7a pin lithium ion v\u1edbi axit khoan s\u1ebd t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m. \u0110i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi nhi\u1ec7t \u0111\u1ed9, trong khi \u0111i\u1ec7n tr\u1edf ohm s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t \u0111\u1ed9 v\u00e0 SOC. \u0110\u1ed1i v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 \u0111i\u1ec7n tr\u1edf ph\u00e2n c\u1ef1c c\u1ee7a pin lithium coban oxit t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, c\u1ea7n ph\u1ea3i l\u00e0m n\u00f3ng b\u1ed9 pin \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u1ec3 c\u1ea3i thi\u1ec7n dung l\u01b0\u1ee3ng v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a pin. <\/span><\/span><\/p>\n

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L\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a t\u00e0u v\u0169 tr\u1ee5, pin lithium-ion oxit coban cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed. Hi\u1ec7u su\u1ea5t c\u1ee7a pin lithium-ion \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ef1 an to\u00e0n, \u0111\u1ed9 m\u01b0\u1ee3t m\u00e0 v\u00e0 t\u00ednh kinh t\u1ebf c\u1ee7a ho\u1ea1t \u0111\u1ed9ng t\u00e0u v\u0169 tr\u1ee5. C\u00e1c y\u00eau c\u1ea7u<\/p>\n","protected":false},"author":1,"featured_media":21031,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-24309","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-test-chambers-knowledge"],"acf":[],"_links":{"self":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/24309","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=24309"}],"version-history":[{"count":0,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/24309\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/21031"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=24309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=24309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=24309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}