公开(公告)号：EP4411392A1

公开(公告)日：2024-08-07

申请号：EP21967675.6

申请日：2021-12-16

申请人： Contemporary Amperex Technology Co., Limited

发明人： MA, Guobin

IPC分类号： G01R19/00 ,  G01R31/36 ,  H01M10/48

CPC分类号： H01M10/48 ,  G01R31/396

摘要： Embodiments of the present application provide a voltage measurement circuit and method, a circuit board, and a control module. The circuit is used for measuring a voltage output by a battery, the battery comprising n battery cells connected in series, wherein n is an integer greater than 1; and the circuit comprising: n low-voltage measurement modules provided in one-to-one correspondence with the n battery cells, a first switching circuit, a second switching circuit, a reference voltage source, and a control module, wherein the reference voltage source is used for outputting a preset reference voltage; and the two ends of each of the low-voltage measurement modules are connected to the two ends of a corresponding one of the battery cells via the first switching circuit, the two ends of each of the low-voltage measurement modules are further connected to the two ends of the reference voltage source via the second switching circuit, and the control module is connected to switching units in the first switching circuit and the second switching circuit, and the control module is further connected to each of the low-voltage measurement modules. The present application makes it possible to balance large-range measurement and measurement precision.