These ICs reduce voltage monitoring board size, provide the industry’s highest level of accuracy and contribute to improved safety
ABLIC (President: Seiji Tanaka, Head office: Minato-ku, Tokyo hereinafter “ABLIC”), a group company of MinebeaMitsumi Inc., today launched the S-82K5B/M5B Series secondary protection ICs for 3 to 5 serially connected cells, which are ABLIC’s first secondary protection ICs with an integrated cascade function that can reduce the number of components required for monitoring of batteries with 6 or more serially connected cells by approximately 30% compared to conventional products.
Secondary protection ICs are used in a wide range of applications which require high voltage such as power tools, vacuum cleaners, and e-bikes, and applications that require a high degree of safety.
Secondary protection ICs are used in combination with protection fuses which blow when an external signal is received. When an overcharge occurs, a signal from the secondary protection IC causes the fuse to blow and break the charging current path to protect connected devices. Conventional secondary protection ICs could monitor batteries with up to 5 serially connected cells but required a large number of external components to monitor larger numbers of serially connected cells.
The new S-82K5B/M5B Series launched today is a secondary protection IC for 3 to 5 serially connected cells with the following features: (1) A cascade function (a function which enables connection protection of more batteries than the maximum number of batteries that a single protection IC can protect) which makes it possible to carry out voltage monitoring of rechargeable batteries with 6 or more serially connected cells using far fewer components than conventional products; (2) an open detection circuit which detects communication failures between ICs to enable safer voltage monitoring; (3) a lineup of two products to ensure that we can flexibly respond to customer needs: the S-82K5B Series with ±20mV overcharge detection voltage accuracy, and the S-82M5B with the industry’s highest accuracy of ±15mV.
Going forward, ABLIC will continue to leverage our technology and knowhow to develop lithium-ion battery protection ICs with even greater accuracy and higher performance and to release products for applications in a wide range of fields.
