SMD fuses on single cell lithium batteries SMD fuses in the single-cell lithium battery applications Preface: Currently, more and more products use lithium batteries as the power supply for the system circuit. Lithium batteries have a small size, high energy density, and no memory effect, but also can be recycled for multiple use and other advantages. But lithium batteries also have accidents. 2009.1.30 Yuexiu District, Guangzhou, Donghua South Road, Lenovo computer store occurred in a cell phone lithium battery explosion, a young man in the store carotid aorta rupture, died on the spot. So the safety of lithium batteries is also increasingly attracting attention. Lithium battery protection board to choose the right chip fuse is also very important. Now back to business I. The composition of a single lithium battery Lithium batteries are mainly composed of battery cells and battery protection boards. The main function of the lithium battery protection board: (1) overcharge protection (2) Over-discharge protection (3) Over current / short circuit protection Lithium battery protection board main components: 1, protection IC   2, MOSFET  3, SMD FUSE II. Single-cell lithium battery protection board on the choice of fuse 1, package: according to the customer's circuit board to determine the trial size, generally 1206/0603 size. 2, rated voltage: 24V or more 3, rated current: generally 5A (taking into account the fuse in the lithium battery protection board is 2 times protection, so the protection IC protection delay should be taken into account). 　　(To take into account the protection IC protection delay time to determine the fuse blowing time) 4, Cold resistance: below 15mΩ. 5, safety requirements: UL certification 6, Comply with RoHS requirements and Halogen-Free requirements. Chip fuse in the single-cell lithium batteries on the application of the talk here.

SMD fuses on single cell lithium batteries

SMD fuses in the single-cell lithium battery applications

Preface: Currently, more and more products use lithium batteries as the power supply for the system circuit. Lithium batteries have a small size, high energy density, and no memory effect, but also can be recycled for multiple use and other advantages.

But lithium batteries also have accidents. 2009.1.30 Yuexiu District, Guangzhou, Donghua South Road, Lenovo computer store occurred in a cell phone lithium battery explosion, a young man in the store carotid aorta rupture, died on the spot. So the safety of lithium batteries is also increasingly attracting attention. Lithium battery protection board to choose the right chip fuse is also very important.

Now back to business
I. The composition of a single lithium battery
Lithium batteries are mainly composed of battery cells and battery protection boards.
The main function of the lithium battery protection board:
(1) overcharge protection
(2) Over-discharge protection
(3) Over current / short circuit protection
Lithium battery protection board main components:
1, protection IC  
2, MOSFET 
3, SMD FUSE

II. Single-cell lithium battery protection board on the choice of fuse
1, package: according to the customer's circuit board to determine the trial size, generally 1206/0603 size.
2, rated voltage: 24V or more
3, rated current: generally 5A (taking into account the fuse in the lithium battery protection board is 2 times protection, so the protection IC protection delay should be taken into account).
　　(To take into account the protection IC protection delay time to determine the fuse blowing time)
4, Cold resistance: below 15mΩ.
5, safety requirements: UL certification
6, Comply with RoHS requirements and Halogen-Free requirements.

Chip fuse in the single-cell lithium batteries on the application of the talk here.