{"id":19738,"date":"2023-01-05T06:52:13","date_gmt":"2023-01-05T06:52:13","guid":{"rendered":"http:\/\/dgbellvietnam.com\/safety-considerations-for-lithium-battery-testing\/"},"modified":"2024-11-15T14:55:19","modified_gmt":"2024-11-15T07:55:19","slug":"safety-considerations-for-lithium-battery-testing","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/safety-considerations-for-lithium-battery-testing\/","title":{"rendered":"An to\u00e0n th\u1eed nghi\u1ec7m pin Lithium"},"content":{"rendered":"
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1. Gi\u1edbi thi\u1ec7u<\/span><\/span><\/strong><\/span><\/h1>\n

L\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng, pin lithium-ion c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m nh\u01b0 m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao, kh\u00f4ng c\u00f3 hi\u1ec7u \u1ee9ng nh\u1edb, tu\u1ed5i th\u1ecd d\u00e0i, th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng, v.v. Sau khi pin lithium-ion nh\u1ecf chi\u1ebfm \u01b0u th\u1ebf trong l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng, pin lithium-ion l\u1edbn \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n, ti\u1ebfn v\u00e0o \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 v\u00e0 l\u01b0\u1edbi \u0111i\u1ec7n.<\/span><\/span><\/p>\n

Vi\u1ec7c \u1ee9ng d\u1ee5ng pin lithium-ion g\u00e2y ra c\u00e1c v\u1ee5 ch\u00e1y n\u1ed5, nhi\u1ec1u nh\u00e0 nghi\u00ean c\u1ee9u trong l\u0129nh v\u1ef1c h\u00f3a h\u1ecdc pin \u0111\u00e3 nghi\u00ean c\u1ee9u v\u00e0 ph\u00e2n t\u00edch l\u00fd do pin h\u1ecfng trong nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau theo quan \u0111i\u1ec3m h\u00f3a h\u1ecdc. Theo c\u00e1c nghi\u00ean c\u1ee9u nh\u01b0 v\u1eady, c\u00e1c th\u00e0nh ph\u1ea7n pin li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn: nhi\u1ec1u v\u1eadt li\u1ec7u anot v\u00e0 catot kh\u00e1c nhau \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh h\u00f3a h\u1ecdc; m\u1ed9t b\u1ed9 t\u00e1ch nhi\u1ec1u l\u1edbp \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ef1 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t; c\u00e1c ch\u1ea5t ph\u1ee5 gia th\u00edch h\u1ee3p \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o ch\u1ea5t \u0111i\u1ec7n ph\u00e2n \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc ho\u1eb7c \u0111\u1ec3 x\u1ea3 pin nh\u1eb1m gi\u1ea3m thi\u1ec3u r\u1ee7i ro qu\u00e1 t\u1ea3i m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh s\u1ea1c b\u00ecnh th\u01b0\u1eddng, v.v. C\u00e1c k\u1ef9 thu\u1eadt s\u1ea3n xu\u1ea5t v\u00e0 l\u1eafp r\u00e1p c\u0169ng \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn \u0111\u1ec3 gi\u1ea3m kh\u1ea3 n\u0103ng x\u1ea3y ra l\u1ed7i. Tuy nhi\u00ean, c\u00e1c th\u00e0nh ph\u1ea7n chi ti\u1ebft c\u1ee7a pin v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp r\u00e1p pin, \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn s\u1ef1 an to\u00e0n c\u1ee7a pin, v\u1eabn ch\u01b0a r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 \u0111i\u1ec7n v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng pin. Do \u0111\u00f3, c\u00e1c nguy\u00ean l\u00fd c\u1ee7a pin lithium-ion c\u1ea7n \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y, sau \u0111\u00f3 c\u00f3 th\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c g\u00f3c nh\u00ecn c\u01a1 b\u1ea3n v\u1ec1 c\u00e1c r\u1ee7i ro do pin lithium-ion g\u00e2y ra v\u00e0 l\u00fd do c\u1ee7a c\u00e1c r\u1ee7i ro \u0111\u00f3. G\u00f3c nh\u00ecn n\u00e0y s\u1ebd cung c\u1ea5p cho c\u00e1c k\u1ef9 s\u01b0 v\u1eadn h\u00e0nh BESS nh\u1eefng c\u00e1ch th\u00edch h\u1ee3p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd t\u1ed1t.<\/span><\/span><\/p>\n

2. Th\u1eed nghi\u1ec7m t\u00ecnh tr\u1ea1ng l\u1ea1m d\u1ee5ng c\u1ee7a Pin Lithium ion<\/span><\/span><\/strong><\/span><\/h1>\n

Tr\u00ean th\u1ef1c t\u1ebf, s\u1ef1 c\u1ed1 c\u1ee7a cell pin lithiumion l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh to\u00e0n di\u1ec7n, c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u b\u1eb1ng b\u1ea5t k\u1ef3 ph\u1ea3n \u1ee9ng t\u1ecfa nhi\u1ec7t n\u00e0o \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean trong khi k\u1ebft th\u00fac b\u1eb1ng c\u00e1c m\u1ed1i nguy hi\u1ec3m kh\u00e1c nhau nh\u01b0 gi\u00e3n n\u1edf th\u00e2n pin, r\u00f2 r\u1ec9 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, tho\u00e1t kh\u00ed, ch\u00e1y, n\u1ed5, v.v. \u0110\u1ec3 \u01b0\u1edbc t\u00ednh m\u1ee9c \u0111\u1ed9 an to\u00e0n c\u1ee7a pin lithium ion th\u01b0\u01a1ng m\u1ea1i, c\u00e1c h\u1ea1ng m\u1ee5c ki\u1ec3m tra l\u1ea1m d\u1ee5ng v\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc, \u0111i\u1ec7n v\u00e0 nhi\u1ec7t \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo c\u00e1c ti\u00eau chu\u1ea9n t\u1eeb UL v\u00e0 IEC. \u0110\u1ed1i v\u1edbi pin lithiumion BESS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u1ee9ng d\u1ee5ng l\u01b0\u1edbi \u0111i\u1ec7n, c\u00e1c lo\u1ea1i pin l\u1edbn c\u00f3 thi\u1ebft k\u1ebf d\u1ea1ng t\u00fai ho\u1eb7c d\u1ea1ng l\u0103ng tr\u1ee5 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean. Trong b\u00e0i b\u00e1o n\u00e0y, c\u00e1c cell pin lithium-ion c\u1ee7a hai lo\u1ea1i \u0111\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m. T\u1ea5t c\u1ea3 c\u00e1c cell \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1ea1c \u0111\u1ea7y tr\u01b0\u1edbc khi th\u1eed nghi\u1ec7m l\u1ea1m d\u1ee5ng theo c\u00e1c ti\u00eau chu\u1ea9n.<\/span><\/span><\/p>\n

2.1 <\/span><\/span>L\u1ea1m d\u1ee5ng nhi\u1ec7t<\/span><\/span><\/a><\/span><\/h2>\n

C\u00e1c cell kh\u00e1ch quan \u0111\u01b0\u1ee3c nung n\u00f3ng trong bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9. Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u1ee7a bu\u1ed3ng \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf m\u1ee9c 130 \u2103 v\u1edbi t\u1ed1c \u0111\u1ed9 t\u0103ng d\u1ea7n l\u00e0 5 \u2103\/ph\u00fat. Sau khi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng trong bu\u1ed3ng \u0111\u1ea1t 130 \u2103, nhi\u1ec7t \u0111\u1ed9 \u0111\u01b0\u1ee3c gi\u1eef trong 10 ph\u00fat v\u00e0 sau \u0111\u00f3 c\u00e1c m\u1eabu \u0111\u01b0\u1ee3c quan s\u00e1t. D\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u00e0y, c\u00e1c r\u1ee7i ro ti\u1ec1m \u1ea9n do l\u1ed7i SEI, s\u1ef1 tan ch\u1ea3y c\u1ee7a b\u1ed9 t\u00e1ch v\u00e0 \u00e1p su\u1ea5t kh\u00ed t\u0103ng t\u1eeb ch\u1ea5t \u0111i\u1ec7n ph\u00e2n. Sau khi th\u1eed nghi\u1ec7m, kh\u00f4ng quan s\u00e1t th\u1ea5y r\u00f2 r\u1ec9, tho\u00e1t kh\u00ed v\u00e0 s\u1ee5t \u00e1p c\u1ee7a c\u00e1c cell pin \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m.<\/span><\/span><\/p>\n

Do \u0111\u00f3, kh\u00f4ng c\u00f3 s\u1ef1 m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t c\u1ee7a c\u00e1c t\u1ebf b\u00e0o \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m. C\u00f3 th\u1ec3 quan s\u00e1t th\u1ea5y t\u1eeb H\u00ecnh 2 r\u1eb1ng s\u1ef1 gi\u00e3n n\u1edf th\u00e2n t\u1ebf b\u00e0o c\u1ee7a c\u1ea3 t\u1ebf b\u00e0o lo\u1ea1i l\u0103ng tr\u1ee5 v\u00e0 t\u1ebf b\u00e0o lo\u1ea1i t\u00fai \u0111\u1ec1u x\u1ea3y ra. S\u1ef1 gi\u00e3n n\u1edf th\u00e2n t\u1ebf b\u00e0o c\u00f3 th\u1ec3 l\u00e0 do ch\u1ea5t \u0111i\u1ec7n ph\u00e2n bay h\u01a1i. T\u1ed1c \u0111\u1ed9 gi\u00e3n n\u1edf th\u00e2n t\u1ebf b\u00e0o trong th\u1eed nghi\u1ec7m ph\u1ee5 thu\u1ed9c v\u00e0o l\u01b0\u1ee3ng dung m\u00f4i c\u00f3 \u0111i\u1ec3m s\u00f4i th\u1ea5p trong ch\u1ea5t \u0111i\u1ec7n ph\u00e2n. V\u00e0 l\u01b0\u1ee3ng ch\u00ednh x\u00e1c v\u00e0 t\u1ef7 l\u1ec7 kh\u00f4ng r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng. Tuy nhi\u00ean, theo quan s\u00e1t, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng m\u1eabu lo\u1ea1i t\u00fai \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong H\u00ecnh 2 (c) c\u00f3 hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n m\u1eabu trong H\u00ecnh 2 (b), \u0111i\u1ec1u n\u00e0y cho th\u1ea5y m\u1ee9c \u0111\u1ed9 an to\u00e0n cao h\u01a1n. M\u1eabu lo\u1ea1i l\u0103ng tr\u1ee5 trong H\u00ecnh 2 (a) cho th\u1ea5y hi\u1ec7u su\u1ea5t t\u1ed1t do c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao do \u0111\u1ed9 d\u00e0y.<\/span><\/span><\/p>\n

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2.2 <\/span><\/span>S\u1ef1 \u0111\u00e2m xuy\u00ean<\/span><\/span><\/a><\/span><\/h2>\n

M\u1ed9t chi\u1ebfc \u0111inh \u22055 mm \u0111\u01b0\u1ee3c \u0111\u00e2m xuy\u00ean v\u00e0o m\u1eabu v\u1edbi t\u1ed1c \u0111\u1ed9 20 mm\/gi\u00e2y. Sau \u0111\u00f3, n\u00f3 \u0111\u01b0\u1ee3c r\u00fat ra sau 1 ph\u00fat. Trong \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m n\u00e0y, c\u00f3 th\u1ec3 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong do ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp gi\u1eefa v\u1eadt li\u1ec7u d\u01b0\u01a1ng v\u00e0 \u00e2m. Nhi\u1ec7t do \u0111o\u1ea3n m\u1ea1ch b\u00ean trong mang l\u1ea1i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn ph\u1ea3n \u1ee9ng ph\u00e2n h\u1ee7y c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a pin.<\/span><\/span><\/p>\n

Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, hi\u1ec7n t\u01b0\u1ee3ng phun ch\u1ea5t \u0111i\u1ec7n ph\u00e2n v\u00e0 tho\u00e1t kh\u00ed nghi\u00eam tr\u1ecdng \u0111\u00e3 \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c cell lo\u1ea1i l\u0103ng tr\u1ee5. \u0110i\u1ec7n \u00e1p \u0111o \u0111\u01b0\u1ee3c v\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a m\u1ed9t cell \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 3(a). C\u00e1c \u0111\u01b0\u1eddng cong cho th\u1ea5y s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch b\u00ean trong g\u00e2y ra s\u1ef1 gi\u1ea3i ph\u00f3ng n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 l\u00e0m gi\u1ea3m \u0111i\u1ec7n \u00e1p c\u1ee7a cell. H\u01a1n n\u1eefa, nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean \u0111\u1ebfn 130 8 \u2103 do n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng. Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t sau \u0111\u00f3 gi\u1ea3m xu\u1ed1ng ph\u1ea1m vi t\u01b0\u01a1ng \u0111\u1ed1i an to\u00e0n, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1c ph\u1ea3n \u1ee9ng d\u00e2y chuy\u1ec1n t\u1ecfa nhi\u1ec7t \u0111\u00e3 kh\u00f4ng x\u1ea3y ra v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u00e3 \u0111\u01b0\u1ee3c tr\u00e1nh sau khi th\u1eed nghi\u1ec7m.<\/span><\/span><\/p>\n

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\u0110\u1ed1i v\u1edbi c\u00e1c cell lo\u1ea1i t\u00fai, kh\u00f4ng ph\u00e1t hi\u1ec7n th\u1ea5y nhi\u1ec7t \u0111\u1ed9 t\u0103ng, ch\u1ea5t \u0111i\u1ec7n ph\u00e2n phun ho\u1eb7c kh\u00ed tho\u00e1t ra trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, ngo\u1ea1i tr\u1eeb m\u1ed9t trong n\u0103m m\u1eabu. Trong H\u00ecnh 3 (b), \u0111i\u1ec7n \u00e1p \u0111o \u0111\u01b0\u1ee3c v\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a cell c\u00f3 v\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n. M\u1ed9t ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng th\u00f4ng qua m\u1ea1ch ng\u1eafn b\u00ean trong. V\u00e0 m\u1ea1ch ng\u1eafn b\u00ean trong \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ea5m d\u1ee9t b\u1edfi kh\u00ed tho\u00e1t ra t\u1eeb ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, l\u00e0m c\u1ea1n ki\u1ec7t th\u00e2n cell v\u00e0 t\u1ea1o th\u00e0nh l\u1edbp c\u00e1ch ly gi\u1eefa v\u1eadt li\u1ec7u d\u01b0\u01a1ng v\u00e0 \u00e2m v\u00e0 l\u1edbp ng\u0103n c\u00e1ch trong khu v\u1ef1c b\u1ecb xuy\u00ean th\u1ee7ng.<\/span><\/span><\/p>\n

S\u1ef1 \u0111o\u1ea3n m\u1ea1ch b\u00ean trong kh\u00f4ng ho\u00e0n ch\u1ec9nh n\u00e0y ch\u1ec9 d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n \u00e1p cell gi\u1ea3m nh\u1eb9 v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec9nh l\u00e0 90,5 \u2103. Khi nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t cell gi\u1ea3m xu\u1ed1ng, hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t kh\u00f4ng x\u1ea3y ra sau khi th\u1eed nghi\u1ec7m. B\u1ea3o v\u1ec7 th\u00f4ng gi\u00f3 c\u1ee7a cell lo\u1ea1i l\u0103ng tr\u1ee5 \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t do \u00e1p su\u1ea5t b\u00ean trong cao, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 4(a). \u0110\u1ed1i v\u1edbi cell lo\u1ea1i t\u00fai, c\u00f3 th\u1ec3 quan s\u00e1t th\u1ea5y s\u1ef1 gi\u00e3n n\u1edf c\u1ee7a th\u00e2n, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 4(b). Nh\u00ecn chung, cell lo\u1ea1i t\u00fai cho th\u1ea5y m\u1ee9c \u0111\u1ed9 an to\u00e0n cao h\u01a1n so v\u1edbi cell lo\u1ea1i l\u0103ng tr\u1ee5.<\/span><\/span><\/p>\n

<\/p>\n

2.3 S\u1ea1c qu\u00e1 m\u1ee9c<\/span><\/span><\/span><\/h2>\n

C\u00e1c m\u1eabu \u0111\u01b0\u1ee3c s\u1ea1c qu\u00e1 m\u1ee9c v\u1edbi d\u00f2ng \u0111i\u1ec7n 0,05 C. Khi \u0111i\u1ec7n \u00e1p c\u1ee7a cell \u0111\u1ea1t 5 V ho\u1eb7c th\u1eddi gian s\u1ea1c \u0111\u1ea1t 30 ph\u00fat, th\u1eed nghi\u1ec7m s\u1ebd k\u1ebft th\u00fac. 1 C \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n m\u00e0 cell pin \u0111\u01b0\u1ee3c x\u1ea3 ho\u00e0n to\u00e0n trong 1 gi\u1edd, ngh\u0129a l\u00e0 1 C b\u1eb1ng 40 A \u0111\u1ed1i v\u1edbi pin c\u00f3 dung l\u01b0\u1ee3ng 40 Ah.<\/span><\/span><\/p>\n

\u0110\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c m\u1eabu \u0111\u00e3 th\u1eed nghi\u1ec7m, kh\u00f4ng c\u00f3 r\u00f2 r\u1ec9 clectrolyte, kh\u00ed tho\u00e1t ra ho\u1eb7c c\u00e1c m\u1ed1i nguy hi\u1ec3m kh\u00e1c \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y. C\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c \u0111\u1ed9 gi\u00e3n n\u1edf c\u1ee7a th\u00e2n m\u1eabu sau khi th\u1eed nghi\u1ec7m. Theo \u0111i\u1ec7n \u00e1p cell \u0111o \u0111\u01b0\u1ee3c, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 b\u1ec1 m\u1eb7t cell \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 5, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t kh\u00f4ng x\u1ea3y ra.<\/span><\/span><\/p>\n

<\/p>\n

2.4 <\/span><\/span>Ng\u1eafn m\u1ea1ch ngo\u00e0i<\/span><\/span><\/a><\/span><\/h2>\n

M\u1ed9t contactor m\u1ea1ch \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c \u0111i\u1ec7n c\u1ef1c m\u1eabu v\u00e0 \u0111i\u1ec7n tr\u1edf ng\u1eafn m\u1ea1ch \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf m\u1ee9c 5 m\u03a9. Trong c\u00e1c th\u1eed nghi\u1ec7m ban \u0111\u1ea7u c\u1ee7a th\u1eed nghi\u1ec7m, c\u00e1c \u0111\u00e1m ch\u00e1y \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n tr\u00ean c\u00e1p ho\u1eb7c contactor, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 6. Do \u0111\u00f3. C\u00e1c c\u00e1p v\u00e0 contactor c\u00f3 d\u00f2ng \u0111i\u1ec7n 1 500 A \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn trong th\u1eed nghi\u1ec7m sau \u0111\u00f3 \u0111\u1ec3 tr\u00e1nh ch\u00e1y trong m\u1ea1ch th\u1eed nghi\u1ec7m.<\/span><\/span><\/p>\n

<\/p>\n

S\u1ef1 gi\u00e3n n\u1edf c\u1ee7a th\u00e2n pin, r\u00f2 r\u1ec9 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n v\u00e0 tho\u00e1t kh\u00ed \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m t\u1ea5t c\u1ea3 c\u00e1c m\u1eabu lo\u1ea1i l\u0103ng tr\u1ee5 c\u0169ng nh\u01b0 m\u1ed9t s\u1ed1 m\u1eabu lo\u1ea1i t\u00fai. Sau khi ti\u1ebfp \u0111i\u1ec3m m\u1ea1ch th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c \u0111\u00f3ng l\u1ea1i, nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t pin t\u0103ng l\u00ean kho\u1ea3ng 100\u00b0C. Khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng cao, th\u00e2n pin gi\u00e3n n\u1edf (nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 7, khu v\u1ef1c A) v\u1edbi kh\u00ed tho\u00e1t ra t\u1eeb ch\u1ea5t \u0111i\u1ec7n ph\u00e2n (nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 7, khu v\u1ef1c B) v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n r\u00f2 r\u1ec9 (nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 7, khu v\u1ef1c C). Cu\u1ed1i c\u00f9ng, m\u1ed9t s\u1ef1 tho\u00e1t kh\u00ed d\u1eef d\u1ed9i v\u1edbi ch\u1ea5t \u0111i\u1ec7n ph\u00e2n (nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 7, khu v\u1ef1c D) \u0111\u00e3 x\u1ea3y ra. Theo ph\u1ea7n gi\u1edbi thi\u1ec7u tr\u01b0\u1edbc \u0111\u00f3 v\u1ec1 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n, kh\u00ed tho\u00e1t ra v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n c\u00f3 th\u1ec3 b\u1eaft l\u1eeda. Sau kho\u1ea3ng 10 ph\u00fat, nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t pin b\u1eaft \u0111\u1ea7u gi\u1ea3m. Kh\u00f4ng c\u00f3 ch\u00e1y ho\u1eb7c n\u1ed5 trong v\u00e0 sau qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m. Do \u0111\u00f3, hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u00e3 kh\u00f4ng x\u1ea3y ra.<\/span><\/span><\/p>\n

<\/p>\n

B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ed9 thu d\u00f2ng \u0111i\u1ec7n c\u1ee7a \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng b\u1ecb n\u00f3ng ch\u1ea3y ngay l\u1eadp t\u1ee9c, ch\u1ea5m d\u1ee9t t\u00ecnh tr\u1ea1ng \u0111o\u1ea3n m\u1ea1ch b\u00ean ngo\u00e0i. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y \u1edf h\u1ea7u h\u1ebft c\u00e1c m\u1eabu lo\u1ea1i t\u00fai v\u00e0 m\u1ed9t m\u1eabu lo\u1ea1i l\u0103ng tr\u1ee5. H\u00ecnh 8 cho th\u1ea5y qu\u00e1 tr\u00ecnh n\u00f3ng ch\u1ea3y c\u1ee7a c\u00e1c m\u1eabu lo\u1ea1i l\u0103ng tr\u1ee5 d\u1eef d\u1ed9i h\u01a1n so v\u1edbi c\u00e1c m\u1eabu lo\u1ea1i t\u00fai. Tia l\u1eeda kim lo\u1ea1i trong H\u00ecnh 8 b\u1eafn ra t\u1eeb b\u1ed9 thu d\u00f2ng \u0111i\u1ec7n d\u01b0\u01a1ng. Nh\u1eefng tia l\u1eeda kim lo\u1ea1i \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u1ed1t ch\u00e1y kh\u00ed tho\u00e1t ra ho\u1eb7c ch\u1ea5t \u0111i\u1ec7n ph\u00e2n b\u1ecb r\u00f2 r\u1ec9 v\u00e0 sau \u0111\u00f3 g\u00e2y ra h\u1ecfa ho\u1ea1n.<\/span><\/span><\/p>\n

<\/p>\n

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

1. Gi\u1edbi thi\u1ec7u L\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng, pin lithium-ion c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m nh\u01b0 m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng cao, kh\u00f4ng c\u00f3 hi\u1ec7u \u1ee9ng nh\u1edb, tu\u1ed5i th\u1ecd d\u00e0i, th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng, v.v. Sau khi pin lithium-ion nh\u1ecf chi\u1ebfm \u01b0u th\u1ebf trong l\u0129nh v\u1ef1c \u0111i\u1ec7n<\/p>\n","protected":false},"author":1,"featured_media":19739,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19738","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\/19738","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=19738"}],"version-history":[{"count":4,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19738\/revisions"}],"predecessor-version":[{"id":22405,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19738\/revisions\/22405"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19739"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}