公开(公告)号：EP3944457A1

公开(公告)日：2022-01-26

申请号：EP21185551.5

申请日：2021-07-14

Applicant: STMicroelectronics Application GmbH

Inventor： EKLER, Markus

IPC: H02J7/00 ,  H01M10/48 ,  H03M7/30 ,  B60L58/10 ,  H01M10/42

Abstract: A processing system (44a) configured to monitor the cell voltages of a given number (n) of cells of a rechargeable battery is described. The processing system (44a) comprises terminals (CP 0 ..CP n ) configured to be connected to the cells in order to receive the cell voltages, at least one analog to digital converter (448) is configured to generate digital samples of the cell voltages. The processing system (44a) comprises also a digital processing circuit (444a), a serial communication interface (440) and a transmission queue (452) used to interface the digital processing circuit (444a) with the serial communication interface (440), whereby the serial communication interface (440) and the digital processing circuit (444a) may operate in parallel. Specifically, the digital processing circuit (444a) is configured to synchronously acquire a given number (k) of digital samples (S 1,1 ..S n,k ) of each of the given number (n) of cell voltages and store the acquired digital samples (S 1,1 ..S n,k ) to a memory (DATA). Next, the digital processing circuit (444a) encodes the digital samples (S 1,1 ..S n,k ) stored to the memory (DATA) via a data compression module (450), thereby generating encoded data, and stores the encoded data to the transmission queue (452).
For example, the data compression module (450) may be configured to generate the encoded data by means of a dynamic range reduction operation (2004), wherein the data compression module (450) subtracts a given offset ( OFF ) from each digital sample (S 1,1 ..S n,k ), thereby generating values indicative of the dynamic variation of each sample with respect to the offset ( OFF ) , and removes a given number of most significant bits from each values. Preferably the given offset ( OFF ) is programmable.