{"id":19624,"date":"2023-12-14T02:31:31","date_gmt":"2023-12-14T02:31:31","guid":{"rendered":"http:\/\/dgbellvietnam.com\/lithium-ev-battery-low-temperature-test\/"},"modified":"2024-10-21T16:06:31","modified_gmt":"2024-10-21T09:06:31","slug":"lithium-ev-battery-low-temperature-test","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/lithium-ev-battery-low-temperature-test\/","title":{"rendered":"Th\u1eed nghi\u1ec7m nhi\u1ec7t th\u1ea5p pin Lithium EV"},"content":{"rendered":"
\n

V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n li\u00ean t\u1ee5c c\u1ee7a c\u00f4ng ngh\u1ec7 pin \u0111i\u1ec7n, pin lithium s\u1eaft phosphate \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec7n h\u00f3a tri\u1ec3n v\u1ecdng nh\u1ea5t do \u0111\u1ed9 an to\u00e0n cao, tu\u1ed5i th\u1ecd chu k\u1ef3 d\u00e0i, m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 n\u1ec1n t\u1ea3ng \u0111i\u1ec7n \u00e1p cao, v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong l\u0129nh v\u1ef1c xe \u0111i\u1ec7n. Pin \u0111i\u1ec7n l\u00e0 ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng tr\u1ef1c ti\u1ebfp cho xe \u0111i\u1ec7n v\u00e0 l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a xe \u0111i\u1ec7n. Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng c\u00f3 \u0111\u1ed9t ph\u00e1 \u0111\u00e1ng k\u1ec3 n\u00e0o trong c\u00f4ng ngh\u1ec7 pin trong th\u1eddi gian ng\u1eafn, vi\u1ec7c kh\u00e1m ph\u00e1 v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a pin c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t h\u01b0\u1edbng nghi\u00ean c\u1ee9u ch\u00ednh.<\/span><\/span><\/p>\n

Nhi\u1ec7t \u0111\u1ed9 pin l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a pin \u0111i\u1ec7n. Pin lithium s\u1eaft phosphate c\u00f3 hi\u1ec7u su\u1ea5t tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. Khi pin lithium-ion ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi 0 \u2103, hi\u1ec7u su\u1ea5t x\u1ea3 c\u1ee7a n\u00f3 s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3. Khi chu k\u1ef3 s\u1ea1c v\u00e0 x\u1ea3 ti\u1ebfn tri\u1ec3n, dung l\u01b0\u1ee3ng pin s\u1ebd b\u1ecb suy gi\u1ea3m kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c. Trong nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 c\u01a1 ch\u1ebf c\u1ee7a pin lithium-ion, nhi\u1ec7t \u0111\u1ed9 qu\u00e1 th\u1ea5p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft tinh ch\u1ea5t \u0111i\u1ec7n ph\u00e2n l\u1ecfng, l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 di chuy\u1ec3n c\u1ee7a c\u00e1c ion lithium gi\u1eefa c\u00e1c \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m, d\u1eabn \u0111\u1ebfn \u0111\u1eb7c t\u00ednh s\u1ea1c v\u00e0 x\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p k\u00e9m h\u01a1n c\u1ee7a pin lithium-ion.<\/span><\/span><\/p>\n

V\u1ec1 ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin lithium-ion, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc \u0111\u00e3 ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u s\u00e2u r\u1ed9ng, bao g\u1ed3m ph\u00e2n t\u00edch nguy\u00ean l\u00fd \u0111\u1ea7u ti\u00ean, ph\u00e2n t\u00edch ph\u1ed5 tr\u1edf kh\u00e1ng \u0111i\u1ec7n h\u00f3a v\u00e0 ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t x\u1ea3 \u0111i\u1ec7n t\u00edch. Vi\u1ec7c thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh nhi\u1ec7t cho pin lithium s\u1eaft phosphate l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p quan tr\u1ecdng \u0111\u1ec3 nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a ch\u00fang. Hi\u1ec7n nay, c\u00f3 ba lo\u1ea1i m\u00f4 h\u00ecnh nhi\u1ec7t ch\u00ednh cho pin lithium-ion, c\u1ee5 th\u1ec3 l\u00e0 m\u00f4 h\u00ecnh gh\u00e9p n\u1ed1i \u0111i\u1ec7n nhi\u1ec7t, m\u00f4 h\u00ecnh gh\u00e9p n\u1ed1i nhi\u1ec7t \u0111i\u1ec7n h\u00f3a v\u00e0 m\u00f4 h\u00ecnh l\u1ea1m d\u1ee5ng nhi\u1ec7t.<\/span><\/span><\/p>\n

B\u00e0i vi\u1ebft n\u00e0y t\u1eadp trung v\u00e0o ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin lithium s\u1eaft phosphate v\u00e0 m\u00f4 ph\u1ecfng c\u00e1c m\u00f4 h\u00ecnh nhi\u1ec7t pin, t\u1eadp trung v\u00e0o hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin \u0111i\u1ec7n lithium s\u1eaft phosphate. M\u1ee5c \u0111\u00edch l\u00e0 thu \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin lithium s\u1eaft phosphate m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng v\u00e0 to\u00e0n di\u1ec7n, cung c\u1ea5p c\u01a1 s\u1edf l\u00fd thuy\u1ebft cho \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong l\u0129nh v\u1ef1c xe \u0111i\u1ec7n.<\/span><\/span><\/p>\n

1 Th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 ph\u00e2n t\u00edch \u0111\u1eb7c t\u00ednh \u0111\u1ed9ng<\/span><\/span><\/strong><\/span><\/h1>\n

1.1 Thi\u1ebft k\u1ebf th\u1eed nghi\u1ec7m hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin<\/span><\/span><\/span><\/h2>\n

C\u00e1c b\u01b0\u1edbc th\u1eed nghi\u1ec7m ch\u1ee7 y\u1ebfu bao g\u1ed3m hai ph\u1ea7n: th\u1eed nghi\u1ec7m c\u00f4ng su\u1ea5t chu\u1ea9n \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau v\u00e0 th\u1eed nghi\u1ec7m \u0111\u1eb7c t\u00ednh \u0111\u1ed9ng. C\u00e1c b\u01b0\u1edbc th\u1eed nghi\u1ec7m c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft nh\u01b0 sau:<\/span><\/span><\/p>\n

(1) Ch\u1ecdn m\u1ed9t c\u1ee5c pin ri\u00eang l\u1ebb ho\u00e0n to\u00e0n m\u1edbi l\u00e0m \u0111\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m v\u00e0 \u0111\u1eb7t v\u00e0o bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9. \u0110\u1eb7t nhi\u1ec7t \u0111\u1ed9 \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng l\u00e0 25\u2103, \u0111\u1ec3 y\u00ean trong 2 gi\u1edd v\u00e0 s\u1eed d\u1ee5ng d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C \u0111\u1ec3 x\u1ea3 pin \u0111\u1ebfn \u0111i\u1ec7n \u00e1p ng\u1eaft l\u00e0 2,5 V<\/span><\/span><\/p>\n

(2) \u0110\u1eb7t nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u00e1y \u1ea5p \u1edf gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 th\u1ef1c nghi\u1ec7m t\u01b0\u01a1ng \u1ee9ng, \u0111\u1ec3 y\u00ean trong 2 gi\u1edd v\u00e0 ti\u1ebfn h\u00e0nh ki\u1ec3m tra dung l\u01b0\u1ee3ng chu\u1ea9n tr\u00ean pin. Ki\u1ec3m tra dung l\u01b0\u1ee3ng chu\u1ea9n bao g\u1ed3m hai b\u01b0\u1edbc: s\u1ea1c \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CCCV, \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i, d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 0,5 C, \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i 3,65 V, d\u00f2ng \u0111i\u1ec7n c\u1eaft 0,01 C) v\u00e0 x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C v\u1edbi \u0111i\u1ec7n \u00e1p c\u1eaft 2,5 V. B\u01b0\u1edbc n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c dung l\u01b0\u1ee3ng s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng hi\u1ec7n t\u1ea1i;<\/span><\/span><\/p>\n

(3) \u0110\u1eb7t nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u00e1y \u1ea5p \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng l\u00e0 25\u2103, \u0111\u1ec3 y\u00ean trong 2 gi\u1edd v\u00e0 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p s\u1ea1c \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CCCV, d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 0,5C, \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i 3,65V, d\u00f2ng \u0111i\u1ec7n c\u1eaft 0,01C) \u0111\u1ec3 s\u1ea1c \u0111\u1ea7y pin.<\/span><\/span><\/p>\n

(4) \u0110\u1ec3 so s\u00e1nh hi\u1ec7u su\u1ea5t c\u1ee7a pin \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, c\u00e1c b\u01b0\u1edbc th\u1eed nghi\u1ec7m tr\u00ean \u0111\u01b0\u1ee3c l\u1eb7p l\u1ea1i l\u1ea7n l\u01b0\u1ee3t \u1edf -15, 0, 10, 25 v\u00e0 40 \u2103.<\/span><\/span><\/p>\n

N\u1ec1n t\u1ea3ng th\u1eed nghi\u1ec7m ki\u1ec3m tra hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin lithium-ion, c\u1ee5 th\u1ec3 bao g\u1ed3m <\/span><\/span>bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 th\u1ea5p<\/span><\/span><\/a> \u0111\u1ec3 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 trong m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m: h\u1ec7 th\u1ed1ng th\u1eed nghi\u1ec7m pin \u0111\u1ec3 th\u1eed nghi\u1ec7m hi\u1ec7u su\u1ea5t pin; Pin lithium s\u1eaft phosphate \u0111\u01a1n cell, l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m; Ph\u1ea7n m\u1ec1m m\u00e1y t\u00ednh tr\u00ean, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eadp tr\u00ecnh ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m pin t\u00f9y ch\u1ec9nh v\u00e0 ghi d\u1eef li\u1ec7u th\u1eed nghi\u1ec7m pin. Pin \u0111\u01a1n cell \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong th\u1eed nghi\u1ec7m l\u00e0 pin lithium s\u1eaft phosphate d\u1ea1ng g\u00f3i m\u1ec1m c\u00f3 dung l\u01b0\u1ee3ng danh ngh\u0129a l\u00e0 40 Ah.<\/span><\/span><\/p>\n

<\/p>\n

1.2 \u0110\u1eb7c t\u00ednh \u0111\u1ed9ng l\u1ef1c h\u1ecdc \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/span><\/h2>\n

D\u1ef1a tr\u00ean d\u1eef li\u1ec7u th\u1ef1c nghi\u1ec7m v\u1ec1 hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin, h\u00e3y thu \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng cong s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin lithium s\u1eaft phosphate \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau. S\u1ea1c pin \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i. D\u00f2ng \u0111i\u1ec7n s\u1ea1c \u1edf giai \u0111o\u1ea1n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i l\u00e0 0,5 C v\u00e0 \u0111i\u1ec7n \u00e1p s\u1ea1c \u1edf giai \u0111o\u1ea1n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i l\u00e0 3,65 V. Khi d\u00f2ng \u0111i\u1ec7n s\u1ea1c nh\u1ecf h\u01a1n 0,01 C, qu\u00e1 tr\u00ecnh s\u1ea1c s\u1ebd d\u1eebng l\u1ea1i; X\u1ea3 pin \u00e1p d\u1ee5ng x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 C v\u00e0 d\u1eebng l\u1ea1i khi \u0111i\u1ec7n \u00e1p c\u1ef1c pin gi\u1ea3m xu\u1ed1ng 2,50 V. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng \u0111\u1eb7c t\u00ednh s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin b\u1ecb \u1ea3nh h\u01b0\u1edfng r\u1ea5t nhi\u1ec1u b\u1edfi nhi\u1ec7t \u0111\u1ed9. Nhi\u1ec7t \u0111\u1ed9 c\u00e0ng th\u1ea5p, \u0111\u1eb7c t\u00ednh s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin c\u00e0ng d\u1ed1c v\u00e0 kh\u1ea3 n\u0103ng s\u1ea1c v\u00e0 x\u1ea3 kh\u1ea3 d\u1ee5ng c\u1ee7a pin c\u00e0ng nh\u1ecf.<\/span><\/span><\/p>\n

Ph\u00e2n t\u00edch \u0111\u1ecbnh l\u01b0\u1ee3ng c\u00e1c \u0111\u01b0\u1eddng cong s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin lithium s\u1eaft phosphate \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c ph\u1ea1m vi s\u1ea1c v\u00e0 x\u1ea3 kh\u1ea3 d\u1ee5ng cho pin \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 c\u00e0ng th\u1ea5p th\u00ec ph\u1ea1m vi s\u1ea1c v\u00e0 x\u1ea3 kh\u1ea3 d\u1ee5ng c\u1ee7a pin c\u00e0ng nh\u1ecf. Khi pin ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng l\u00e0 -15 \u2103, ph\u1ea1m vi s\u1ea1c v\u00e0 x\u1ea3 kh\u1ea3 d\u1ee5ng c\u1ee7a pin ch\u1ec9 chi\u1ebfm 22,2% dung l\u01b0\u1ee3ng danh \u0111\u1ecbnh, kh\u00f4ng c\u00f2n c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u l\u00e0m vi\u1ec7c b\u00ecnh th\u01b0\u1eddng c\u1ee7a pin \u0111i\u1ec7n. Ngo\u00e0i ra, khi pin ho\u1ea1t \u0111\u1ed9ng \u1edf 40 \u2103, gi\u1edbi h\u1ea1n s\u1ea1c l\u1ea1i t\u1ed1i \u0111a \u0111\u01b0\u1ee3c \u0111o c\u1ee7a pin c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi 110%. \u0110i\u1ec1u n\u00e0y l\u00e0 do nhi\u1ec7t \u0111\u1ed9 c\u00e0ng cao, n\u0103ng l\u01b0\u1ee3ng t\u1ef1 do Gibbs c\u1ee7a ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a trong pin c\u00e0ng l\u1edbn, c\u00f4ng \u0111i\u1ec7n th\u1ef1c hi\u1ec7n c\u00e0ng l\u1edbn v\u00e0 dung l\u01b0\u1ee3ng s\u1ea1c l\u1ea1i t\u01b0\u01a1ng \u1ee9ng.<\/span><\/span><\/p>\n

C\u1ea7n l\u01b0u \u00fd r\u1eb1ng SOC l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng t\u01b0\u01a1ng \u0111\u1ed1i c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc. B\u00e0i vi\u1ebft n\u00e0y \u0111\u1ecbnh ngh\u0129a nh\u01b0 sau: s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p x\u1ea3 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 0,01 C, pin \u0111\u01b0\u1ee3c x\u1ea3 \u0111\u1ebfn 2,50 V v\u00e0 tr\u1ea1ng th\u00e1i \u1edf \u0111i\u1ec7n \u00e1p c\u1eaft \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 0% SOC; S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CCCV, d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 0,5 C, \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i 3,65 V, d\u00f2ng \u0111i\u1ec7n c\u1eaft 0,01 C), tr\u1ea1ng th\u00e1i c\u1ee7a pin khi \u0111\u01b0\u1ee3c s\u1ea1c \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n c\u1eaft 0,01 C \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 100% SOC; C\u00e1c \u0111\u1ecbnh ngh\u0129a tr\u00ean \u0111\u1ec1u \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng l\u00e0 25 \u2103.<\/span><\/span><\/p>\n

<\/h1>\n

2 X\u00e1c \u0111\u1ecbnh tham s\u1ed1 c\u1ee7a m\u00f4 h\u00ecnh nhi\u1ec7t<\/span><\/span><\/span><\/h1>\n

2.1 X\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 nhi\u1ec7t v\u1eadt l\u00fd c\u1ee7a pin<\/span><\/span><\/span><\/h2>\n

D\u1ef1a tr\u00ean m\u00f4 h\u00ecnh pin, x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 m\u00f4 h\u00ecnh th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m s\u1ea1c v\u00e0 x\u1ea3 pin. Trong qu\u00e1 tr\u00ecnh th\u00ed nghi\u1ec7m, b\u1eb1ng c\u00e1ch \u0111\u1eb7t pin trong m\u00f4i tr\u01b0\u1eddng 20 \u2103, c\u00f3 th\u1ec3 gi\u1ea3 \u0111\u1ecbnh g\u1ea7n \u0111\u00fang r\u1eb1ng ch\u1ec9 c\u00f3 s\u1ef1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u t\u1ef1 nhi\u00ean tr\u00ean b\u1ec1 m\u1eb7t pin. C\u00e1c th\u00ed nghi\u1ec7m s\u1ea1c v\u00e0 x\u1ea3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh \u1edf 1 C, 1,5 C, 2 C v\u00e0 2,5 C, v\u1edbi \u0111i\u1ec7n \u00e1p c\u1eaft l\u1ea7n l\u01b0\u1ee3t l\u00e0 3,65 v\u00e0 250 V. Ph\u1ea3n \u1ee9ng s\u1ea1c c\u1ee7a pin l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh thu nhi\u1ec7t, trong khi ph\u1ea3n \u1ee9ng x\u1ea3 l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh t\u1ecfa nhi\u1ec7t. V\u00ec c\u00e1c gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a nhi\u1ec7t ph\u1ea3n \u1ee9ng trong qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 l\u00e0 nh\u01b0 nhau, n\u00ean ch\u1ec9 ph\u00e2n t\u00edch qu\u00e1 tr\u00ecnh x\u1ea3.<\/span><\/span><\/p>\n

Bi\u1ec3u \u0111\u1ed3 \u0111\u01b0\u1eddng cong nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t pin theo th\u1eddi gian \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 x\u1ea3 kh\u00e1c nhau. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng c\u00e1c gi\u00e1 tr\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9 c\u00f3 dao \u0111\u1ed9ng nh\u1ecf, ch\u1ee7 y\u1ebfu l\u00e0 do \u0111\u1ed9 nh\u1ea1y cao c\u1ee7a m\u00e1y \u1ea3nh nhi\u1ec7t, nhi\u1ec1u \u0111i\u1ec3m l\u1ea5y m\u1eabu v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u00e1nh s\u00e1ng xung quanh. Nh\u1eefng dao \u0111\u1ed9ng nh\u1ecf n\u00e0y kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn xu h\u01b0\u1edbng chung c\u1ee7a nh\u1eefng thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1ed1 \u0111\u1ec3 t\u00ednh to\u00e1n \u0111\u1ed9 d\u1ed1c c\u1ee7a t\u1eebng \u0111\u01b0\u1eddng cong, \u0111\u1ed9 d\u1ed1c c\u1ee7a b\u1ed1n \u0111\u01b0\u1eddng cong c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng v\u00e0 theo c\u00f4ng th\u1ee9c, c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c nhi\u1ec7t dung ri\u00eang c\u1ee7a pin C = -0,00333.<\/span><\/span><\/p>\n

2.2 X\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin<\/span><\/span><\/span><\/h2>\n

Do nhi\u1ec7t Joule g\u00e2y ra b\u1edfi \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin l\u00e0 ngu\u1ed3n nhi\u1ec7t ch\u00ednh, \u0111\u1ec3 ph\u00e2n t\u00edch s\u00e2u nhi\u1ec7t Joule trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng c\u1ee7a pin, c\u1ea7n ph\u1ea3i x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau. Th\u1ef1c hi\u1ec7n Ki\u1ec3m tra \u0111\u1eb7c t\u00ednh c\u00f4ng su\u1ea5t xung lai (HPPC) tr\u00ean pin sau m\u1ed7i 10% SOC \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1eed nghi\u1ec7m l\u00e0 -15, 0, 10, 25 v\u00e0 40 \u2103.<\/span><\/span><\/p>\n

D\u1ef1a tr\u00ean d\u1eef li\u1ec7u th\u1eed nghi\u1ec7m, thu\u1eadt to\u00e1n b\u00ecnh ph\u01b0\u01a1ng nh\u1ecf nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin t\u1ea1i m\u1ed7i \u0111i\u1ec3m th\u1eed nghi\u1ec7m. \u1ede c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, \u0111\u01b0\u1eddng cong quan h\u1ec7 gi\u1eefa gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin v\u00e0 SOC \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin v\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u00e0ng th\u1ea5p th\u00ec \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin c\u00e0ng l\u1edbn.<\/span><\/span><\/p>\n

3 M\u00f4 ph\u1ecfng m\u00f4 h\u00ecnh nhi\u1ec7t<\/span><\/span><\/strong><\/span><\/h1>\n

3.1 Th\u1eed nghi\u1ec7m m\u00f4 h\u00ecnh nhi\u1ec7t c\u1ee7a pin<\/span><\/span><\/span><\/h2>\n

\u0110\u1ec3 x\u00e1c minh \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a m\u00f4 h\u00ecnh, m\u00f4 h\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn th\u00f4ng qua c\u00e1c th\u00ed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 d\u1ef1a tr\u00ean c\u1ea5u tr\u00fac m\u00f4 h\u00ecnh nhi\u1ec7t pin v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 \u1edf tr\u00ean. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng l\u00e0 24,8 \u2103. Trong qu\u00e1 tr\u00ecnh th\u00ed nghi\u1ec7m, pin \u0111\u01b0\u1ee3c x\u1ea3 \u1edf t\u1ed1c \u0111\u1ed9 x\u1ea3 l\u00e0 0,5 C v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u1edf t\u00e2m b\u1ec1 m\u1eb7t pin \u0111\u01b0\u1ee3c thu th\u1eadp theo th\u1eddi gian th\u1ef1c b\u1eb1ng c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec7n tr\u1edf b\u1ea1ch kim c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/span><\/span><\/p>\n

M\u00f4 h\u00ecnh nhi\u1ec7t pin c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 c\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng sinh nhi\u1ec7t th\u1ef1c t\u1ebf c\u1ee7a pin. Khi ph\u1ea3n \u1ee9ng x\u1ea3 pin di\u1ec5n ra, nhi\u1ec7t \u0111\u1ed9 \u1edf t\u00e2m b\u1ec1 m\u1eb7t pin t\u0103ng d\u1ea7n. Do c\u00f3 s\u1ef1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u t\u1ef1 nhi\u00ean, nhi\u1ec7t \u0111\u1ed9 \u1edf t\u00e2m b\u1ec1 m\u1eb7t pin d\u1ea7n \u0111\u1ea1t \u0111\u1ebfn xu h\u01b0\u1edbng \u1ed5n \u0111\u1ecbnh theo th\u1eddi gian.<\/span><\/span><\/p>\n

3.2 \u0110\u1eb7c t\u00ednh nhi\u1ec7t v\u1eadt l\u00fd \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/strong><\/span><\/h2>\n

B\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t m\u00f4 ph\u1ecfng c\u1ee7a pin khi x\u1ea3 \u1edf t\u1ed1c \u0111\u1ed9 0,5 C \u0111\u1ebfn \u0111i\u1ec7n \u00e1p c\u1eaft 2,5 V \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng do hi\u1ec7u \u1ee9ng t\u1ecfa nhi\u1ec7t trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a, nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a pin cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u1ed1i thi\u1ec3u c\u1ee7a b\u1ec1 m\u1eb7t pin c\u0169ng cho th\u1ea5y s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau. Nguy\u00ean nh\u00e2n c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0 khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin t\u0103ng theo m\u00f4 h\u00ecnh h\u00e0m m\u0169 g\u1ea7n \u0111\u00fang.<\/span><\/span><\/p>\n

\u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng th\u1ea5p h\u01a1n, \u0111i\u1ec7n tr\u1edf b\u00ean trong c\u1ee7a pin t\u0103ng \u0111\u00e1ng k\u1ec3. Khi c\u00f9ng m\u1ed9t t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng ph\u00f3ng \u0111i\u1ec7n x\u1ea3y ra b\u00ean trong pin, hi\u1ec7n t\u01b0\u1ee3ng sinh nhi\u1ec7t do \u0111i\u1ec7n tr\u1edf b\u00ean trong t\u0103ng \u0111\u00e1ng k\u1ec3. Do \u0111\u00f3, theo \u0111i\u1ec1u ki\u1ec7n bi\u00ean c\u1ee7a truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u trong pin, nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a pin s\u1ebd cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng.<\/span><\/span><\/p>\n

\u0110\u1ed3ng th\u1eddi, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 \u1edf ph\u1ea7n tr\u00ean c\u1ee7a pin, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf tai c\u1ef1c, \u0111\u00e3 t\u0103ng \u0111\u00e1ng k\u1ec3 so v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c v\u00e0 c\u00f3 m\u1ed9t gradient nhi\u1ec7t \u0111\u1ed9 \u0111\u00e1ng k\u1ec3 t\u1eeb tai c\u1ef1c \u0111\u1ebfn \u0111\u00e1y pin. \u0110i\u1ec1u n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u pin. Cell pin \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb nhi\u1ec1u v\u1eadt li\u1ec7u d\u1ecb h\u01b0\u1edbng kh\u00e1c nhau v\u00e0 c\u00e1c tai \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m c\u1ee7a pin l\u1ea7n l\u01b0\u1ee3t \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng kim lo\u1ea1i nh\u00f4m v\u00e0 kim lo\u1ea1i niken. Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u00e1c tai \u0111i\u1ec7n c\u1ef1c, di\u1ec7n t\u00edch m\u1eb7t c\u1eaft gi\u1ea3m \u0111\u00e1ng k\u1ec3 v\u00e0 \u0111i\u1ec7n tr\u1edf b\u00ean trong t\u0103ng m\u1ea1nh. Hi\u1ec7u \u1ee9ng nhi\u1ec7t c\u1ee7a \u0111i\u1ec7n tr\u1edf b\u00ean trong t\u1ea1i c\u00e1c tai \u0111i\u1ec7n c\u1ef1c cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi l\u00f5i pin. Do \u0111\u00f3, trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a c\u1ee7a pin, ph\u1ea7n l\u1edbn nhi\u1ec7t \u0111\u01b0\u1ee3c t\u1ea1o ra \u1edf c\u00e1c tai \u0111i\u1ec7n c\u1ef1c v\u00e0 nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb c\u00e1c tai \u0111i\u1ec7n c\u1ef1c \u0111\u1ebfn cell th\u00f4ng qua d\u1eabn nhi\u1ec7t, t\u1ea1o th\u00e0nh m\u1ed9t gradient nhi\u1ec7t \u0111\u1ed9 r\u00f5 r\u00e0ng.<\/span><\/span><\/p>\n

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

B\u00e0i b\u00e1o n\u00e0y nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin \u0111i\u1ec7n lithium s\u1eaft phosphate cho xe \u0111i\u1ec7n. \u0110\u1ea7u ti\u00ean, c\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a pin \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 ti\u1ebfn h\u00e0nh. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y \u0111\u1eb7c t\u00ednh s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin b\u1ecb \u1ea3nh h\u01b0\u1edfng r\u1ea5t nhi\u1ec1u b\u1edfi nhi\u1ec7t \u0111\u1ed9. Nhi\u1ec7t \u0111\u1ed9 c\u00e0ng th\u1ea5p, \u0111\u1eb7c t\u00ednh s\u1ea1c v\u00e0 x\u1ea3 c\u1ee7a pin c\u00e0ng d\u1ed1c v\u00e0 kh\u1ea3 n\u0103ng s\u1ea1c v\u00e0 x\u1ea3 kh\u1ea3 d\u1ee5ng c\u1ee7a pin c\u00e0ng nh\u1ecf. Th\u1ee9 hai, m\u1ed9t m\u00f4 h\u00ecnh nhi\u1ec7t v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p cho pin lithium s\u1eaft phosphate \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. Cu\u1ed1i c\u00f9ng, m\u1ed9t nghi\u00ean c\u1ee9u m\u00f4 ph\u1ecfng \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh tr\u00ean m\u00f4 h\u00ecnh nhi\u1ec7t c\u1ee7a pin lithium s\u1eaft phosphate.<\/span><\/span><\/p>\n

K\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng cho th\u1ea5y m\u00f4 h\u00ecnh nhi\u1ec7t pin \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t trong b\u00e0i b\u00e1o n\u00e0y c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 c\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng sinh nhi\u1ec7t th\u1ef1c t\u1ebf c\u1ee7a pin. Trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng \u0111i\u1ec7n h\u00f3a c\u1ee7a pin, ph\u1ea7n l\u1edbn nhi\u1ec7t \u0111\u01b0\u1ee3c sinh ra \u1edf c\u00e1c tai \u0111i\u1ec7n c\u1ef1c v\u00e0 nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb c\u00e1c tai \u0111i\u1ec7n c\u1ef1c \u0111\u1ebfn cell pin th\u00f4ng qua d\u1eabn nhi\u1ec7t, t\u1ea1o th\u00e0nh m\u1ed9t gradient nhi\u1ec7t \u0111\u1ed9 \u0111\u00e1ng k\u1ec3. Khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng gi\u1ea3m, ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa b\u1ec1 m\u1eb7t pin v\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng tr\u1edf n\u00ean l\u1edbn h\u01a1n v\u00e0 gradient nhi\u1ec7t \u0111\u1ed9 \u1edf ph\u1ea7n d\u01b0\u1edbi c\u1ee7a b\u1ec1 m\u1eb7t pin s\u1ebd t\u0103ng d\u1ea7n.<\/span><\/span><\/p>\n

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

V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n li\u00ean t\u1ee5c c\u1ee7a c\u00f4ng ngh\u1ec7 pin \u0111i\u1ec7n, pin lithium s\u1eaft phosphate \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec7n h\u00f3a tri\u1ec3n v\u1ecdng nh\u1ea5t do \u0111\u1ed9 an to\u00e0n cao, tu\u1ed5i th\u1ecd chu k\u1ef3 d\u00e0i, m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 n\u1ec1n t\u1ea3ng \u0111i\u1ec7n \u00e1p cao, v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong<\/p>\n","protected":false},"author":1,"featured_media":19625,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19624","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\/19624","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=19624"}],"version-history":[{"count":3,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19624\/revisions"}],"predecessor-version":[{"id":21942,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19624\/revisions\/21942"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19625"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}