{"id":19622,"date":"2023-12-21T02:24:46","date_gmt":"2023-12-21T02:24:46","guid":{"rendered":"http:\/\/dgbellvietnam.com\/li-ion-power-battery-thermal-safety-test\/"},"modified":"2024-10-21T16:02:14","modified_gmt":"2024-10-21T09:02:14","slug":"li-ion-power-battery-thermal-safety-test","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/li-ion-power-battery-thermal-safety-test\/","title":{"rendered":"Th\u1eed nghi\u1ec7m an to\u00e0n nhi\u1ec7t pin Li-ion"},"content":{"rendered":"
\n

Pin lithium ion c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng l\u1edbn do m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 kh\u1ea3 n\u0103ng t\u1ef1 x\u1ea3 th\u1ea5p. Tuy nhi\u00ean, trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, l\u01b0\u1ee3ng nhi\u1ec7t sinh ra r\u1ea5t l\u1edbn v\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u00ean trong pin s\u1ebd t\u0103ng nhanh. C\u00e1c tai n\u1ea1n \u0111\u1eb7c tr\u01b0ng b\u1edfi s\u1ef1 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t th\u01b0\u1eddng x\u1ea3y ra, d\u1eabn \u0111\u1ebfn h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng. Do \u0111\u00f3, vi\u1ec7c nghi\u00ean c\u1ee9u v\u1ec1 an to\u00e0n nhi\u1ec7t c\u1ee7a pin l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft.<\/span><\/span><\/p>\n

C\u00e1c h\u1ecdc gi\u1ea3 trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc \u0111\u00e3 ti\u1ebfn h\u00e0nh m\u1ed9t lo\u1ea1t c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 t\u00ednh an to\u00e0n c\u1ee7a pin. Bao g\u1ed3m nh\u01b0ng kh\u00f4ng gi\u1edbi h\u1ea1n \u1edf:<\/span><\/span><\/p>\n

Ph\u00e2n t\u00edch c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eed nghi\u1ec7m an to\u00e0n pin.<\/span><\/span><\/p>\n

\u0110\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh t\u0103ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n \u00e1p l\u00e0m vi\u1ec7c c\u1ee7a pin lithium-ion \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m.<\/span><\/span><\/p>\n

M\u1ed9t lo\u1ea1t c\u00e1c qu\u00e1 tr\u00ecnh ti\u1ebfn h\u00f3a c\u1ee7a c\u00e1c v\u1ee5 tai n\u1ea1n pin \u0111i\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch th\u1ed1ng k\u00ea v\u00e0 \u0111\u01b0a ra \u0111\u1ec1 xu\u1ea5t r\u1eb1ng v\u1ea5n \u0111\u1ec1 c\u1ed1t l\u00f5i c\u1ee7a c\u00e1c v\u1ee5 tai n\u1ea1n pin l\u00e0 s\u1ef1 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t.<\/span><\/span><\/p>\n

\u0110\u1ec1 xu\u1ea5t c\u00e1c c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n r\u1ea5t ti\u00ean ti\u1ebfn cho pin \u0111i\u1ec7n, bao g\u1ed3m ch\u1ea5t \u0111i\u1ec7n ph\u00e2n kh\u00f4ng th\u1ec3 bay h\u01a1i ho\u1eb7c r\u00f2 r\u1ec9, v\u00e0 \u0111\u00f3ng g\u00f3i pin b\u1eb1ng v\u1eadt li\u1ec7u ch\u1eafc ch\u1eafn.<\/span><\/span><\/p>\n

D\u1ef1a tr\u00ean ph\u00e2n t\u00edch c\u00e1c v\u1ee5 ch\u00e1y pin \u0111i\u1ec3n h\u00ecnh trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc, m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m so\u00e1t kh\u1ea3 thi \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t, bao g\u1ed3m c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u pin, s\u1eed d\u1ee5ng ch\u1ea5t \u0111i\u1ec7n ph\u00e2n an to\u00e0n v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ch\u1eefa ch\u00e1y m\u1edbi.<\/span><\/span><\/p>\n

\u0110\u1eb7c t\u00ednh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a pin lithium-ion v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 t\u1ed1c \u0111\u1ed9 x\u1ea3 s\u1ea1c v\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng \u0111\u1ebfn hi\u1ec7u su\u1ea5t pin \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m.<\/span><\/span><\/p>\n

Ph\u00e2n t\u00edch qu\u00e1 tr\u00ecnh sinh nhi\u1ec7t c\u1ee7a pin, bao g\u1ed3m s\u1ef1 ph\u00e2n h\u1ee7y c\u1ee7a m\u00e0ng SEI, ch\u1ea5t \u0111i\u1ec7n ph\u00e2n v\u00e0 \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng, c\u0169ng nh\u01b0 ph\u1ea3n \u1ee9ng gi\u1eefa \u0111i\u1ec7n c\u1ef1c \u00e2m v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, \u0111i\u1ec7n c\u1ef1c \u00e2m v\u00e0 ch\u1ea5t k\u1ebft d\u00ednh.<\/span><\/span><\/p>\n

Vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 pin b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p l\u01b0u tr\u1eef nhi\u1ec7t v\u1eadt li\u1ec7u thay \u0111\u1ed5i pha \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u th\u00f4ng qua ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n th\u1ef1c nghi\u1ec7m v\u00e0 s\u1ed1.<\/span><\/span><\/p>\n

Th\u00f4ng qua ph\u00e2n t\u00edch d\u1eef li\u1ec7u th\u1ef1c nghi\u1ec7m, t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1ed1c \u0111\u1ed9 s\u1ea1c v\u00e0 x\u1ea3, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 tr\u1ea1ng th\u00e1i s\u1ea1c \u0111\u1ebfn \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a pin \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn. T\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1ed1c \u0111\u1ed9 s\u1ea1c v\u00e0 x\u1ea3 cao h\u01a1n, \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng th\u1ea5p h\u01a1n v\u00e0 tr\u1ea1ng th\u00e1i s\u1ea1c cao h\u01a1n \u0111\u1ebfn s\u1ef1 gia t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a pin. \u0110\u1ed3ng th\u1eddi, t\u1ef7 l\u1ec7 \u0111i\u1ec7n tr\u1edf trong ohmic v\u00e0 \u0111i\u1ec7n tr\u1edf trong ph\u00e2n c\u1ef1c trong qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin \u0111i\u1ec7n lithium-ion \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch.<\/span><\/span><\/p>\n

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

H\u1ec7 th\u1ed1ng th\u1eed nghi\u1ec7m ph\u1ea3n \u1ee9ng gia nhi\u1ec7t b\u1eb1ng \u0111i\u1ec7n c\u1ee7a qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 pin \u0111i\u1ec7n ch\u1ee7 y\u1ebfu bao g\u1ed3m pin, <\/span><\/span>bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i<\/span><\/span><\/a> , thi\u1ebft b\u1ecb s\u1ea1c v\u00e0 x\u1ea3, c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n, thi\u1ebft b\u1ecb thu th\u1eadp d\u1eef li\u1ec7u, m\u00e1y t\u00ednh, v.v. Pin s\u1eed d\u1ee5ng pin \u0111i\u1ec7n lithium s\u1eaft phosphate h\u00ecnh vu\u00f4ng (130 mm x 70 mm x 22 mm), c\u00f3 dung l\u01b0\u1ee3ng danh \u0111\u1ecbnh l\u00e0 20 Ah cho t\u1eebng pin.<\/span><\/span><\/p>\n

Thi\u1ebft b\u1ecb ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea1c v\u00e0 x\u1ea3 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n s\u1ea1c v\u00e0 x\u1ea3 kh\u00f4ng \u0111\u1ed5i. S\u1eed d\u1ee5ng thi\u1ebft b\u1ecb thu th\u1eadp d\u1eef li\u1ec7u \u0111\u1ec3 thu th\u1eadp nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a pin, trong \u0111\u00f3 c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n l\u00e0 lo\u1ea1i K. C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed \u1edf gi\u1eefa c\u00e1c \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m c\u1ee7a pin, c\u0169ng nh\u01b0 m\u1eb7t tr\u01b0\u1edbc v\u00e0 m\u1eb7t b\u00ean c\u1ee7a pin. Kh\u1edfi \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng m\u00e1y t\u00ednh v\u00e0 ghi d\u1eef li\u1ec7u \u0111\u1ed3ng b\u1ed9.<\/span><\/span><\/p>\n

C\u00e1c th\u00ed nghi\u1ec7m m\u00f4 ph\u1ecfng pin \u0111i\u1ec7n m\u1ed9t cell \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh, v\u1edbi vi\u1ec7c s\u1ea1c v\u00e0 x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i \u1edf 0,25 C, 0,5 C, 0,75 C v\u00e0 1 C, \u0111\u1ec3 ki\u1ec3m tra nh\u1eefng thay \u0111\u1ed5i v\u1ec1 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a pin trong qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n t\u1ea3n nhi\u1ec7t m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean. S\u1ea1c \u0111\u1ebfn 3,6 V v\u00e0 x\u1ea3 \u0111\u1ebfn 2,0 V \u0111\u1ec3 ho\u00e0n t\u1ea5t th\u00ed nghi\u1ec7m.<\/span><\/span><\/p>\n

2 K\u1ebft qu\u1ea3 v\u00e0 Ph\u00e2n t\u00edch<\/span><\/span><\/strong><\/span><\/h1>\n

Bi\u1ebfn thi\u00ean nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin theo th\u1eddi gian t\u1ea1i c\u00e1c \u0111i\u1ec3m \u0111o kh\u00e1c nhau khi s\u1ea1c \u1edf d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng m\u1eabu t\u0103ng nhi\u1ec7t \u0111\u1ed9 t\u1ea1i c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau tr\u00ean b\u1ec1 m\u1eb7t pin l\u00e0 t\u01b0\u01a1ng t\u1ef1 nhau. Nhi\u1ec7t \u0111\u1ed9 t\u0103ng t\u01b0\u01a1ng \u0111\u1ed1i nh\u1eb9 tr\u01b0\u1edbc qu\u00e1 tr\u00ecnh s\u1ea1c trong 2500 gi\u00e2y, nh\u01b0ng sau 2500 gi\u00e2y, nhi\u1ec7t \u0111\u1ed9 t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau tr\u00ean b\u1ec1 m\u1eb7t pin t\u0103ng m\u1ea1nh. Ph\u00e2n t\u00edch cho th\u1ea5y khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh s\u1ea1c, \u0111\u1ed9 ph\u00e2n c\u1ef1c c\u1ee7a pin tr\u1edf n\u00ean r\u00f5 r\u00e0ng v\u00e0 \u0111i\u1ec7n tr\u1edf b\u00ean trong ph\u00e2n c\u1ef1c t\u0103ng l\u00ean, d\u1eabn \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 gia nhi\u1ec7t c\u1ee7a pin t\u0103ng m\u1ea1nh.<\/span><\/span><\/p>\n

So s\u00e1nh nhi\u1ec7t \u0111\u1ed9 \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau, nhi\u1ec7t \u0111\u1ed9 pin kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n \u0111\u1ed3ng \u0111\u1ec1u. Khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh s\u1ea1c, ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi 10\u2103.<\/span><\/span><\/p>\n

T\u00f3m t\u1eaft \u0111\u1ecbnh lu\u1eadt bi\u1ebfn thi\u00ean t\u1ed5ng \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin theo th\u1eddi gian trong qu\u00e1 tr\u00ecnh s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C. C\u00f3 th\u1ec3 th\u1ea5y t\u1ed5ng \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin kh\u00f4ng thay \u0111\u1ed5i nhi\u1ec1u trong qu\u00e1 tr\u00ecnh s\u1ea1c. Ch\u1ec9 \u1edf giai \u0111o\u1ea1n s\u1ea1c mu\u1ed9n, \u0111\u1ed9 ph\u00e2n c\u1ef1c c\u1ee7a pin t\u0103ng m\u1ea1nh, v\u00e0 s\u1ef1 gia t\u0103ng \u0111i\u1ec7n tr\u1edf trong ph\u00e2n c\u1ef1c d\u1eabn \u0111\u1ebfn t\u1ed5ng \u0111i\u1ec7n tr\u1edf t\u0103ng.<\/span><\/span><\/p>\n

Khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh s\u1ea1c pin \u0111\u01a1n n\u0103ng, nhi\u1ec7t \u0111\u1ed9 t\u0103ng c\u1ee7a pin thay \u0111\u1ed5i theo d\u00f2ng \u0111i\u1ec7n s\u1ea1c. Nhi\u1ec7t \u0111\u1ed9 t\u0103ng t\u01b0\u01a1ng \u1ee9ng khi s\u1ea1c \u1edf 0,25 \u0111\u1ed9 C, 0,5 \u0111\u1ed9 C, 0,75 \u0111\u1ed9 C v\u00e0 1 \u0111\u1ed9 C l\u1ea7n l\u01b0\u1ee3t l\u00e0 11,9 \u0111\u1ed9 C, 14,5 \u0111\u1ed9 C, 28,5 \u0111\u1ed9 C v\u00e0 38,6 \u0111\u1ed9 C. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng t\u1ed1c \u0111\u1ed9 s\u1ea1c c\u00e0ng cao th\u00ec c\u00f4ng su\u1ea5t l\u00e0m n\u00f3ng c\u1ee7a pin c\u00e0ng l\u1edbn. Trong \u0111i\u1ec1u ki\u1ec7n truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u t\u1ef1 nhi\u00ean, nhi\u1ec7t \u0111\u1ed9 t\u0103ng tr\u00ean b\u1ec1 m\u1eb7t pin c\u00e0ng l\u1edbn.<\/span><\/span><\/p>\n

Qu\u00e1 tr\u00ecnh x\u1ea3 pin \u0111\u01a1n cell \u1edf d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C: nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau tr\u00ean b\u1ec1 m\u1eb7t pin theo th\u1eddi gian. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng m\u00f4 h\u00ecnh t\u0103ng nhi\u1ec7t \u0111\u1ed9 \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau l\u00e0 t\u01b0\u01a1ng t\u1ef1 nhau: trong qu\u00e1 tr\u00ecnh x\u1ea3 r\u01a1le, nhi\u1ec7t \u0111\u1ed9 t\u0103ng kho\u1ea3ng 25,2 \u2103.<\/span><\/span><\/p>\n

Khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh x\u1ea3 c\u1ee7a m\u1ed9t pin \u0111\u01a1n n\u0103ng, nhi\u1ec7t \u0111\u1ed9 t\u0103ng c\u1ee7a pin thay \u0111\u1ed5i theo d\u00f2ng \u0111i\u1ec7n s\u1ea1c. Nhi\u1ec7t \u0111\u1ed9 t\u0103ng t\u01b0\u01a1ng \u1ee9ng khi s\u1ea1c \u1edf 0,25 \u0111\u1ed9 C, 0,5 \u0111\u1ed9 C, 0,75 \u0111\u1ed9 C v\u00e0 1 \u0111\u1ed9 C l\u1ea7n l\u01b0\u1ee3t l\u00e0 7,4 \u0111\u1ed9 C, 15,8 \u0111\u1ed9 C, 23,8 \u0111\u1ed9 C v\u00e0 25,2 \u0111\u1ed9 C. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng t\u1ed1c \u0111\u1ed9 x\u1ea3 c\u00e0ng cao, nhi\u1ec7t \u0111\u1ed9 t\u0103ng tr\u00ean b\u1ec1 m\u1eb7t pin c\u00e0ng l\u1edbn.<\/span><\/span><\/p>\n

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

Ti\u1ebfn h\u00e0nh qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 tr\u00ean m\u1ed9t \u1eafc quy \u0111\u01a1n 20 Ah v\u00e0 \u0111o nhi\u1ec7t \u0111\u1ed9 t\u1ea1i c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau tr\u00ean b\u1ec1 m\u1eb7t \u1eafc quy, m\u1ed9t lo\u1ea1t c\u00e1c m\u1eabu \u0111\u00e3 thu \u0111\u01b0\u1ee3c. Qu\u00e1 tr\u00ecnh s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i c\u1ee7a m\u1ed9t \u1eafc quy \u0111\u01a1n n\u0103ng d\u1eabn \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 \u1eafc quy t\u0103ng \u0111\u1ed9t ng\u1ed9t v\u00e0o cu\u1ed1i chu k\u1ef3 s\u1ea1c. Ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a t\u1eebng \u1eafc quy kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m c\u1ee7a \u1eafc quy cao h\u01a1n c\u00e1c khu v\u1ef1c kh\u00e1c.<\/span><\/span><\/p>\n

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

Pin lithium ion c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng l\u1edbn do m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 kh\u1ea3 n\u0103ng t\u1ef1 x\u1ea3 th\u1ea5p. Tuy nhi\u00ean, trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, l\u01b0\u1ee3ng nhi\u1ec7t sinh ra r\u1ea5t l\u1edbn v\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u00ean trong pin s\u1ebd t\u0103ng nhanh. C\u00e1c tai n\u1ea1n \u0111\u1eb7c tr\u01b0ng b\u1edfi s\u1ef1 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t th\u01b0\u1eddng<\/p>\n","protected":false},"author":1,"featured_media":19623,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19622","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\/19622","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=19622"}],"version-history":[{"count":2,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19622\/revisions"}],"predecessor-version":[{"id":21937,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19622\/revisions\/21937"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19623"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}