{"id":19863,"date":"2022-02-10T00:50:15","date_gmt":"2022-02-10T00:50:15","guid":{"rendered":"http:\/\/dgbellvietnam.com\/analysis-of-the-lithium-ion-battery-safety-stability-test-part-2\/"},"modified":"2024-10-25T15:32:51","modified_gmt":"2024-10-25T08:32:51","slug":"analysis-of-the-lithium-ion-battery-safety-stability-test-part-2","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/analysis-of-the-lithium-ion-battery-safety-stability-test-part-2\/","title":{"rendered":"Ph\u00e2n t\u00edch v\u1ec1 An to\u00e0n pin Lithium-ion; Th\u1eed nghi\u1ec7m \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh-Ph\u1ea7n 2"},"content":{"rendered":"
\n

1.3 Th\u1eed nghi\u1ec7m qu\u00e1 t\u1ea3i<\/span><\/span><\/span><\/h1>\n

Vi\u1ec7c s\u1ea1c qu\u00e1 m\u1ee9c c\u1ee7a m\u1ed9t pin \u0111\u01a1n ph\u1ea3i \u0111\u01b0\u1ee3c d\u1eebng l\u1ea1i sau khi s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 <\/span><\/span>I <\/span><\/span><\/em>1<\/span><\/span><\/sub> (A) cho \u0111\u1ebfn khi \u0111i\u1ec7n \u00e1p \u0111\u1ea1t 15 l\u1ea7n \u0111i\u1ec7n \u00e1p k\u1ebft th\u00fac s\u1ea1c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt c\u1ee7a doanh nghi\u1ec7p ho\u1eb7c th\u1eddi gian s\u1ea1c \u0111\u1ea1t 1 gi\u1edd. Quan s\u00e1t trong 1 gi\u1edd. Trong qu\u00e1 tr\u00ecnh n\u00e0y, pin kh\u00f4ng \u0111\u01b0\u1ee3c n\u1ed5 ho\u1eb7c b\u1eaft l\u1eeda. Vi\u1ec7c s\u1ea1c qu\u00e1 m\u1ee9c c\u1ee7a pin m\u00f4-\u0111un c\u0169ng ph\u1ea3i d\u1eebng s\u1ea1c sau khi s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 <\/span><\/span>I <\/span><\/span><\/em>1<\/span><\/span><\/sub> (A) cho \u0111\u1ebfn khi \u0111i\u1ec7n \u00e1p c\u1ee7a b\u1ea5t k\u1ef3 pin \u0111\u01a1n n\u00e0o \u0111\u1ea1t 15 l\u1ea7n \u0111i\u1ec7n \u00e1p k\u1ebft th\u00fac s\u1ea1c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt c\u1ee7a doanh nghi\u1ec7p ho\u1eb7c th\u1eddi gian s\u1ea1c \u0111\u1ea1t 1 gi\u1edd v\u00e0 quan s\u00e1t trong 1 gi\u1edd. Trong qu\u00e1 tr\u00ecnh n\u00e0y, pin kh\u00f4ng \u0111\u01b0\u1ee3c n\u1ed5 ho\u1eb7c b\u1eaft l\u1eeda.<\/span><\/span><\/p>\n

\u1ede giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a th\u1eed nghi\u1ec7m qu\u00e1 t\u1ea3i, l\u1edbp m\u00e0ng ranh gi\u1edbi \u0111i\u1ec7n ph\u00e2n r\u1eafn (SEI) si\u00eau b\u1ec1n h\u00ecnh th\u00e0nh tr\u00ean b\u1ec1 m\u1eb7t \u0111i\u1ec7n c\u1ef1c \u00e2m cacbon ph\u1ea3n \u1ee9ng ph\u00e2n h\u1ee7y t\u1ecfa nhi\u1ec7t \u0111\u1ea7u ti\u00ean. Ti\u1ebfp t\u1ee5c s\u1ea1c, \u0111i\u1ec7n \u00e1p pin ti\u1ebfp t\u1ee5c t\u0103ng v\u00e0 nhi\u1ec7t \u0111\u1ed9 pin ti\u1ebfp t\u1ee5c t\u0103ng. Ngo\u00e0i ph\u1ea3n \u1ee9ng gi\u1eefa \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u0111i\u1ec7n c\u1ef1c \u00e2m v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 \u1edf \u0111\u00e2y, \u0111i\u1ec7n \u00e1p cao c\u0169ng s\u1ebd g\u00e2y ra s\u1ef1 ph\u00e2n h\u1ee7y c\u1ee7a ch\u1ea5t \u0111i\u1ec7n ph\u00e2n. Do \u0111\u00f3, m\u1ed9t l\u01b0\u1ee3ng l\u1edbn kh\u00ed s\u1ebd \u0111\u01b0\u1ee3c t\u1ea1o ra b\u00ean trong pin v\u00e0 pin s\u1ebd ph\u1ed3ng l\u00ean nghi\u00eam tr\u1ecdng (nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 1). Ti\u1ebfp t\u1ee5c s\u1ea1c. D\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 \u00e1p su\u1ea5t cao, m\u1ed9t l\u01b0\u1ee3ng l\u1edbn kh\u00ed \u0111\u01b0\u1ee3c phun ra t\u1eeb b\u00ean trong pin t\u1ea1o th\u00e0nh kh\u00f3i d\u00e0y, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 2. Khi \u0111i\u1ec1u n\u00e0y x\u1ea3y ra, cacbonat tuy\u1ebfn t\u00ednh trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n s\u1ebd b\u1ecb \u0111\u1ed1t ch\u00e1y b\u1edfi nhi\u1ec7t \u0111\u1ed9 cao sau h\u00e0ng ch\u1ee5c gi\u00e2y, g\u00e2y ra h\u1ecfa ho\u1ea1n ho\u1eb7c th\u1eadm ch\u00ed n\u1ed5, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 3.<\/span><\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/p>\n

M\u1ed9t lo\u1ea1i ch\u00e1y pin kh\u00e1c c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m \u0111o\u1ea3n m\u1ea1ch m\u00f4-\u0111un trong \u0111\u00f3 nhi\u1ec1u pin \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i song song v\u00e0 sau \u0111\u00f3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i n\u1ed1i ti\u1ebfp. Khi pin b\u1ecb bi\u1ebfn d\u1ea1ng nghi\u00eam tr\u1ecdng do s\u1ea3n xu\u1ea5t kh\u00ed v\u00e0 b\u01a1m h\u01a1i, c\u00e1c v\u1ea5u d\u01b0\u01a1ng v\u00e0 \u00e2m b\u00ean ngo\u00e0i pin ti\u1ebfp x\u00fac v\u1edbi nhau d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed9 ph\u1eadn k\u1ebft n\u1ed1i, d\u1eabn \u0111\u1ebfn \u0111o\u1ea3n m\u1ea1ch v\u00e0 ch\u00e1y, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 4.<\/span><\/span><\/p>\n

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1.4 <\/span><\/span>Th\u1eed nghi\u1ec7m nghi\u1ec1n<\/span><\/span><\/a><\/span><\/h1>\n

M\u00e1y nghi\u1ec1n monome ph\u1ea3i l\u00e0 m\u1ed9t n\u1eeda h\u00ecnh tr\u1ee5 c\u00f3 b\u00e1n k\u00ednh 75mm (chi\u1ec1u d\u00e0i c\u1ee7a n\u1eeda h\u00ecnh tr\u1ee5 l\u1edbn h\u01a1n k\u00edch th\u01b0\u1edbc c\u1ee7a pin \u0111\u00f9n). H\u01b0\u1edbng nghi\u1ec1n ph\u1ea3i vu\u00f4ng g\u00f3c v\u1edbi h\u01b0\u1edbng c\u1ee7a t\u1ea5m pin. Nh\u1ea5n pin v\u1edbi t\u1ed1c \u0111\u1ed9 (5 \u00b1 1) mm \/ s \u0111\u1ec3 d\u1eebng l\u1ea1i sau m\u1ed9t trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau: \u0111i\u1ec7n \u00e1p \u0111\u1ea1t 0V ho\u1eb7c bi\u1ebfn d\u1ea1ng \u0111\u1ea1t 30% ho\u1eb7c l\u1ef1c nghi\u1ec1n \u0111\u1ea1t 200kn v\u00e0 quan s\u00e1t trong 1 gi\u1edd. Trong d\u1ef1 \u00e1n n\u00e0y, pin s\u1ebd kh\u00f4ng n\u1ed5 ho\u1eb7c b\u1eaft l\u1eeda. T\u1ea5m nghi\u1ec1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u1ec1n m\u00f4-\u0111un t\u01b0\u01a1ng t\u1ef1 nh\u01b0 nghi\u1ec1n \u0111\u01a1n. H\u01b0\u1edbng nghi\u1ec1n gi\u1ed1ng v\u1edbi h\u01b0\u1edbng m\u00e0 m\u00f4-\u0111un pin c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb \u00e9p nhi\u1ec1u nh\u1ea5t trong b\u1ed1 tr\u00ed c\u1ee7a to\u00e0n b\u1ed9 xe (n\u1ebfu kh\u00f4ng c\u00f3 h\u01b0\u1edbng c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb \u00e9p nhi\u1ec1u nh\u1ea5t, h\u00e3y t\u00e1c d\u1ee5ng l\u1ef1c \u00e9p vu\u00f4ng g\u00f3c v\u1edbi h\u01b0\u1edbng s\u1eafp x\u1ebfp c\u1ee7a pin \u0111\u01a1n). Khi bi\u1ebfn d\u1ea1ng c\u1ee7a m\u00f4-\u0111un pin \u0111\u1ea1t 30% \u1edf (5 \u00b1 1) mm \/ s ho\u1eb7c l\u1ef1c nghi\u1ec1n \u0111\u1ea1t \u0111\u1ebfn m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1ecbnh, h\u00e3y d\u1eebng l\u1ea1i Gi\u1eef trong 10 ph\u00fat v\u00e0 quan s\u00e1t trong 1 gi\u1edd. Trong qu\u00e1 tr\u00ecnh n\u00e0y, m\u00f4-\u0111un pin s\u1ebd kh\u00f4ng ph\u00e1t n\u1ed5 ho\u1eb7c b\u1eaft l\u1eeda.<\/span><\/span><\/p>\n

C\u00f3 hai tr\u01b0\u1eddng h\u1ee3p m\u00e0 s\u1ef1 \u0111\u00e8 b\u1eb9p khi\u1ebfn pin m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t: \u00e1p su\u1ea5t \u0111\u00e8 b\u1eb9p l\u00e0m bi\u1ebfn d\u1ea1ng pin v\u00e0 m\u00e0ng ng\u0103n b\u00ean trong b\u1ecb v\u1ee1. Ph\u1ea3n \u1ee9ng do ti\u1ebfp x\u00fac gi\u1eefa c\u00e1c t\u1ea5m d\u01b0\u01a1ng v\u00e0 \u00e2m trong pin t\u01b0\u01a1ng t\u1ef1 nh\u01b0 trong th\u1eed nghi\u1ec7m ch\u00e2m c\u1ee9u, d\u1eabn \u0111\u1ebfn ch\u00e1y n\u1ed5 pin, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 5; Tr\u01b0\u1eddng h\u1ee3p th\u1ee9 hai t\u01b0\u01a1ng t\u1ef1 nh\u01b0 th\u1eed nghi\u1ec7m ng\u1eafn m\u1ea1ch. Sau khi pin b\u1ecb bi\u1ebfn d\u1ea1ng, c\u00e1c v\u1ea5u d\u01b0\u01a1ng v\u00e0 \u00e2m ti\u1ebfp x\u00fac v\u1edbi nhau t\u1ea1o th\u00e0nh hi\u1ec7n t\u01b0\u1ee3ng ng\u1eafn m\u1ea1ch b\u00ean ngo\u00e0i c\u1ee7a pin v\u00e0 cu\u1ed1i c\u00f9ng x\u1ea3y ra ch\u00e1y n\u1ed5, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 6.<\/span><\/span><\/p>\n

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2.Th\u1eed nghi\u1ec7m an to\u00e0n c\u00f9ng GB\/T314673-2015<\/span><\/span><\/strong><\/span><\/h1>\n

Ti\u00eau chu\u1ea9n GB \/ T314673-2015 h\u01b0\u1edbng \u0111\u1ebfn c\u00e1c y\u00eau c\u1ea7u an to\u00e0n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed9 pin \u0111i\u1ec7n lithium-ion cho xe \u0111i\u1ec7n. C\u00f3 16 h\u1ea1ng m\u1ee5c th\u1eed nghi\u1ec7m an to\u00e0n. Th\u1eed nghi\u1ec7m an to\u00e0n hi\u1ec7u su\u1ea5t \u0111i\u1ec7n (b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i, b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i, b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch v\u00e0 b\u1ea3o v\u1ec7 qu\u00e1 nhi\u1ec7t) c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed9 pin \u0111i\u1ec7n \u0111\u1ec1u l\u00e0 c\u00e1c th\u1eed nghi\u1ec7m b\u1ea3o v\u1ec7. Ngh\u0129a l\u00e0, n\u1ebfu b\u1ed9 pin ho\u1eb7c h\u1ec7 th\u1ed1ng c\u00f3 c\u00e1c h\u00e0nh \u0111\u1ed9ng b\u1ea3o v\u1ec7 nh\u01b0 ng\u1eaft k\u1ebft n\u1ed1i r\u01a1le v\u00e0 c\u1ea7u ch\u00ec n\u00f3ng ch\u1ea3y trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, th\u00ec th\u1eed nghi\u1ec7m s\u1ebd v\u01b0\u1ee3t qua v\u00e0 n\u00f3i chung s\u1ebd kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t. Nh\u00ecn chung, t\u1ef7 l\u1ec7 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t c\u1ee7a h\u1ec7 th\u1ed1ng ho\u1eb7c b\u1ed9 pin \u0111i\u1ec7n lithium-ion l\u00e0 nh\u1ecf, ch\u1ee7 y\u1ebfu t\u1eadp trung trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m rung v\u00e0 nghi\u1ec1n.<\/span><\/span><\/p>\n

2.1 <\/span><\/span>Th\u1eed nghi\u1ec7m rung<\/span><\/span><\/a><\/span><\/h1>\n

L\u1eafp \u0111\u1eb7t \u0111\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m tr\u00ean b\u00e0n rung. Th\u1eed nghi\u1ec7m rung \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo ba h\u01b0\u1edbng, b\u1eaft \u0111\u1ea7u t\u1eeb tr\u1ee5c z, sau \u0111\u00f3 l\u00e0 tr\u1ee5c Y v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 tr\u1ee5c x. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c, th\u1eddi gian th\u1eed nghi\u1ec7m theo m\u1ed7i h\u01b0\u1edbng l\u00e0 21 gi\u1edd. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, h\u00e3y theo d\u00f5i tr\u1ea1ng th\u00e1i c\u1ee7a \u0111\u01a1n v\u1ecb gi\u00e1m s\u00e1t nh\u1ecf nh\u1ea5t b\u00ean trong \u0111\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111i\u1ec7n \u00e1p v\u00e0 nhi\u1ec7t \u0111\u1ed9. Sau khi th\u1eed nghi\u1ec7m rung, h\u00e3y quan s\u00e1t trong 2 gi\u1edd r\u1eb1ng b\u1ed9 pin kh\u00f4ng b\u1ecb r\u00f2 r\u1ec9, v\u1ee1 v\u1ecf, ch\u00e1y ho\u1eb7c n\u1ed5. \u0110i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n sau khi th\u1eed nghi\u1ec7m kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n 100 \u03a9\/V.<\/span><\/span><\/p>\n

Trong qu\u00e1 tr\u00ecnh rung \u0111\u1ed9ng d\u00e0i h\u1ea1n, t\u1ea5m c\u00e1ch \u0111i\u1ec7n c\u1ee7a pin m\u00f4-\u0111un d\u1ec5 r\u01a1i ra ho\u1eb7c m\u00f2n, v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m v\u1ea5u d\u01b0\u01a1ng v\u00e0 \u00e2m ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi v\u1ecf pin t\u1ea1o th\u00e0nh \u0111o\u1ea3n m\u1ea1ch, d\u1eabn \u0111\u1ebfn pin b\u1ecb m\u1ea5t nhi\u1ec7t, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 7. \u0110\u1ed3ng th\u1eddi, trong qu\u00e1 tr\u00ecnh rung \u0111\u1ed9ng, ng\u01b0\u1eddi ta c\u0169ng th\u1ea5y r\u1eb1ng b\u1ed9 ph\u1eadn k\u1ebft n\u1ed1i c\u1ee7a pin t\u1ea1o ra \u1ee9ng su\u1ea5t m\u1ea1nh v\u00e0 d\u1ec5 b\u1ecb r\u00e1ch \u1edf tai c\u1ef1c c\u00f3 k\u1ebft n\u1ed1i s\u00e1ng m\u1ea1nh \u1edf tr\u1ea1ng th\u00e1i t\u0129nh, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 8.<\/span><\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/p>\n

Ti\u00eau chu\u1ea9n rung \u0111\u1ed9ng c\u1ee7a GB \/ T314673-2015 qu\u00e1 nghi\u00eam ng\u1eb7t so v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n kh\u00e1c v\u00e0 nhi\u1ec1u b\u1ed9 pin s\u1ebd b\u1ecb m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m rung \u0111\u1ed9ng. Trong b\u1ea3n s\u1eeda \u0111\u1ed5i s\u1ed1 1, ti\u00eau chu\u1ea9n rung \u0111\u1ed9ng \u0111\u01b0\u1ee3c thay \u0111\u1ed5i th\u00e0nh rung \u0111\u1ed9ng s\u00f3ng sin 15 ph\u00fat c\u1ee7a b\u1ed9 pin ho\u1eb7c h\u1ec7 th\u1ed1ng v\u00e0 t\u1ea7n s\u1ed1 rung t\u0103ng t\u1eeb 7Hz \u0111\u1ebfn 50Hz r\u1ed3i tr\u1edf v\u1ec1 7Hz. Chu k\u1ef3 n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c l\u1eb7p l\u1ea1i 12 l\u1ea7n trong 3 gi\u1edd theo h\u01b0\u1edbng th\u1eb3ng \u0111\u1ee9ng c\u1ee7a v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t b\u1ed9 pin ho\u1eb7c h\u1ec7 th\u1ed1ng do nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ec9 \u0111\u1ecbnh. Ch\u1ea1y 1 chu k\u1ef3 ti\u00eau chu\u1ea9n sau khi rung \u0111\u1ed9ng. Sau khi th\u1eed nghi\u1ec7m, quan s\u00e1t trong 1 gi\u1edd d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u1ee7a th\u1eed nghi\u1ec7m. Y\u00eau c\u1ea7u: b\u1ed9 pin ho\u1eb7c h\u1ec7 th\u1ed1ng ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady v\u00e0 c\u1ea5u tr\u00fac ph\u1ea3i c\u00f2n nguy\u00ean v\u1eb9n. B\u1ed9 pin ho\u1eb7c h\u1ec7 th\u1ed1ng kh\u00f4ng \u0111\u01b0\u1ee3c r\u00f2 r\u1ec9, v\u1ee1 v\u1ecf, ch\u00e1y ho\u1eb7c n\u1ed5; \u0110i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n sau khi th\u1eed nghi\u1ec7m kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n 100 \u03a9 \/ V. Sau khi th\u1ef1c hi\u1ec7n l\u1ec7nh s\u1eeda \u0111\u1ed5i, hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t c\u1ee7a b\u1ed9 pin hi\u1ebfm khi x\u1ea3y ra. Ti\u00eau chu\u1ea9n ki\u1ec3m tra \u0111\u1ed9 rung c\u1ee7a c\u1ee5m pin ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng theo ph\u1ed5 \u0111\u01b0\u1eddng c\u1ee7a xe \u0111i\u1ec7n ch\u1ea1y tr\u00ean \u0111\u01b0\u1eddng chung. Kh\u00f4ng n\u00ean qu\u00e1 nghi\u00eam ng\u1eb7t ho\u1eb7c qu\u00e1 l\u1ecfng l\u1ebbo. Do \u0111\u00f3, tr\u1ecdng t\u00e2m hi\u1ec7n nay l\u00e0 x\u00e2y d\u1ef1ng v\u00e0 tri\u1ec3n khai ti\u00eau chu\u1ea9n \u0111\u1ed9 rung c\u1ee7a c\u1ee5m pin v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh x\u00e1c v\u00e0 c\u00e1c b\u01b0\u1edbc ho\u00e0n h\u1ea3o c\u00e0ng s\u1edbm c\u00e0ng t\u1ed1t.<\/span><\/span><\/p>\n

2.2 <\/span><\/span>Th\u1eed nghi\u1ec7m \u0111\u1ed9 nghi\u1ec1n c\u1ee7a pin<\/span><\/span><\/a><\/span><\/h1>\n

Qu\u00e1 tr\u00ecnh nghi\u1ec1n b\u1ed9 pin s\u1eed d\u1ee5ng m\u1ed9t n\u1eeda h\u00ecnh tr\u1ee5 c\u00f3 b\u00e1n k\u00ednh 75mm. Chi\u1ec1u d\u00e0i c\u1ee7a n\u1eeda h\u00ecnh tr\u1ee5 l\u1edbn h\u01a1n chi\u1ec1u cao c\u1ee7a v\u1eadt th\u1eed nghi\u1ec7m, nh\u01b0ng kh\u00f4ng qu\u00e1 1m. D\u1eebng nghi\u1ec1n khi l\u1ef1c nghi\u1ec1n \u0111\u1ea1t 200kn ho\u1eb7c bi\u1ebfn d\u1ea1ng nghi\u1ec1n \u0111\u1ea1t 30% k\u00edch th\u01b0\u1edbc t\u1ed5ng th\u1ec3 theo h\u01b0\u1edbng nghi\u1ec1n. Gi\u1eef trong 10 ph\u00fat v\u00e0 quan s\u00e1t trong 1 gi\u1edd. B\u1ed9 pin kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh l\u1eeda, n\u1ed5 v\u00e0 c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng kh\u00e1c.<\/span><\/span><\/p>\n

Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m \u0111\u1eadp v\u1ee1 pin, ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng pin v\u01b0\u1ee3t qua th\u1eed nghi\u1ec7m \u0111\u1eadp v\u1ee1 th\u01b0\u1eddng d\u1eebng th\u1eed nghi\u1ec7m sau khi l\u1ef1c \u0111\u1eadp v\u1ee1 \u0111\u1ea1t t\u1edbi 200kn. N\u1ebfu \u0111\u1ed9 b\u1ec1n v\u1ecf c\u1ee7a pin kh\u00f4ng \u0111\u1ee7 v\u00e0 \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a pin \u0111\u1ea1t t\u1edbi 30%, th\u00ec th\u01b0\u1eddng s\u1ebd x\u1ea3y ra h\u1ecfa ho\u1ea1n (nh\u01b0 trong H\u00ecnh 9). B\u1edfi v\u00ec sau khi pin b\u1ecb bi\u1ebfn d\u1ea1ng, \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a m\u1ed9t s\u1ed1 pin b\u00ean trong pin th\u1eadm ch\u00ed s\u1ebd v\u01b0\u1ee3t qu\u00e1 80%. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, monome ho\u1eb7c m\u00f4-\u0111un b\u00ean trong pin s\u1ebd m\u1ea5t ki\u1ec3m so\u00e1t v\u1ec1 m\u1eb7t nhi\u1ec7t.<\/span><\/span><\/p>\n

<\/p>\n

Trong b\u1ea3n s\u1eeda \u0111\u1ed5i s\u1ed1 1, l\u1ef1c nghi\u1ec1n c\u1ee7a \u0111\u1ea7u nghi\u1ec1n \u0111\u01b0\u1ee3c thay \u0111\u1ed5i t\u1eeb 200 kn th\u00e0nh 100 kn, c\u00e1c ti\u00eau chu\u1ea9n kh\u00e1c v\u1eabn kh\u00f4ng thay \u0111\u1ed5i. Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf c\u1ee7a to\u00e0n b\u1ed9 xe, l\u1ef1c nghi\u1ec1n sau khi va ch\u1ea1m kh\u00f4ng ch\u1eafc ch\u1eafn, v\u00e0 s\u1ef1 bi\u1ebfn d\u1ea1ng c\u1ee7a pin c\u00f3 th\u1ec3 r\u1ea5t l\u1edbn. Do \u0111\u00f3, nhi\u1ec1u xe \u0111i\u1ec7n s\u1ebd b\u1ed1c ch\u00e1y trong tr\u01b0\u1eddng h\u1ee3p x\u1ea3y ra tai n\u1ea1n va ch\u1ea1m.<\/span><\/span><\/p>\n

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

Pin lithium-ion s\u1ebd x\u1ea3y ra m\u1ed9t lo\u1ea1t c\u00e1c ph\u1ea3n \u1ee9ng do c\u00e1c l\u00fd do ri\u00eang l\u1ebb ho\u1eb7c trong \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng sai m\u1ee5c \u0111\u00edch v\u00e0 l\u1ea1m d\u1ee5ng, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0 ch\u00e1y n\u1ed5 pin. C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh x\u00e1c v\u00e0 ti\u00eau chu\u1ea9n th\u1eed nghi\u1ec7m chu\u1ea9n h\u00f3a l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n quan tr\u1ecdng \u0111\u1ec3 x\u00e1c minh t\u00ednh an to\u00e0n c\u1ee7a pin. B\u00e0i b\u00e1o n\u00e0y gi\u1edbi thi\u1ec7u m\u1ed9t s\u1ed1 th\u1eed nghi\u1ec7m ti\u00eau bi\u1ec3u trong \u0111\u00f3 c\u00e1c cell pin, m\u00f4-\u0111un, b\u1ed9 pin v\u00e0 h\u1ec7 th\u1ed1ng d\u1ec5 b\u1ecb m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t, \u0111\u1ed3ng th\u1eddi ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n v\u00e0 c\u01a1 ch\u1ebf m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t. Hi\u1ec7n nay, pin lithium-ion ch\u01b0a ho\u00e0n h\u1ea3o v\u00e0 v\u1ea5n \u0111\u1ec1 an to\u00e0n l\u00e0 v\u1ea5n \u0111\u1ec1 ch\u00ednh h\u1ea1n ch\u1ebf ng\u00e0nh n\u0103ng l\u01b0\u1ee3ng m\u1edbi. Tuy nhi\u00ean, v\u1edbi s\u1ef1 ph\u1ed5 bi\u1ebfn v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a v\u1eadt li\u1ec7u pin lithium-ion c\u00f3 \u0111\u1ed9 an to\u00e0n cao, s\u1ef1 tr\u01b0\u1edfng th\u00e0nh c\u1ee7a c\u00f4ng ngh\u1ec7 qu\u1ea3n l\u00fd pin v\u00e0 vi\u1ec7c c\u1ea3i thi\u1ec7n c\u00e1c ti\u00eau chu\u1ea9n ki\u1ec3m tra, pin lithium-ion s\u1ebd \u0111\u00f3ng vai tr\u00f2 to l\u1edbn trong t\u01b0\u01a1ng lai.<\/span><\/span><\/p>\n

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

1.3 Th\u1eed nghi\u1ec7m qu\u00e1 t\u1ea3i Vi\u1ec7c s\u1ea1c qu\u00e1 m\u1ee9c c\u1ee7a m\u1ed9t pin \u0111\u01a1n ph\u1ea3i \u0111\u01b0\u1ee3c d\u1eebng l\u1ea1i sau khi s\u1ea1c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i 1 I 1 (A) cho \u0111\u1ebfn khi \u0111i\u1ec7n \u00e1p \u0111\u1ea1t 15 l\u1ea7n \u0111i\u1ec7n \u00e1p k\u1ebft th\u00fac s\u1ea1c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt c\u1ee7a doanh nghi\u1ec7p ho\u1eb7c th\u1eddi<\/p>\n","protected":false},"author":1,"featured_media":19864,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19863","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\/19863","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=19863"}],"version-history":[{"count":3,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19863\/revisions"}],"predecessor-version":[{"id":22103,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19863\/revisions\/22103"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19864"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}