Fault tolerant battery module comprising parallel branches and voltage sensing assembly

A battery module (2) comprises:

• a control circuit (1) configured to monitor battery cells (C11-CNM) of the battery module (2) and to control switches (Q11-Q1M, Q21-Q2M) of the battery module (2),
• a first node (3) and a second node (4) for charging and/or discharging of the battery module (2), and
• at least two first branches (71-7M) that are parallelly connected between the first and second nodes (3, 4),
• wherein each first branch (71-7M) of said at least two first branches (71-7M) is arranged to be capable of connecting the first and second nodes (3,4) by means of a respective first switch (Q11-Q1M) of the switches (Q11-Q1M, Q21-Q2M), wherein said each first branch (71-7M) comprises:
• a respective plurality of battery cells (C11-CN1, . . . , C1M-CNM) of the battery cells (C11-CNM),
• a respective first branch over-current protecting component (F11-F1M), and
• the respective first switch (Q11-Q1M),
• wherein the respective plurality of cells (C11-CN1, . . . , C1M-CNM), the respective first branch over-current protecting component (F11-F1M) and the respective first switch (Q11-Q1M) are connected in series, and
• wherein the battery module (2) comprises:
• one or more second branches (81-8M) arranged to be capable of connecting the first and second nodes (3,4) by means of one or more second switches (Q21-Q2M) of the switches (Q11-Q1M, Q21-Q2M), wherein each second branch (81-8M) of said one or more second branches (81-8M) comprises a respective second switch (Q21-Q2M) of said one or more second switches (Q21-Q2M), and
• wherein the control circuit (1) is provided with a number of connection lines (V1-VN) corresponding to at least a first count of the respective plurality of battery cells (C11-CN1, . . . , C1M-CNM),
• wherein each connection line (V1-VN) of the number of connection lines (V1-VN) is arranged to parallelly connect a respective set (C11-C1M, C21-C2M, . . . , CN1-CNM) of corresponding battery cells (C11-CNM) to each other via a respective cell over-current protecting component (L11-L1M, L21-L2M, . . . , LN1-LNM) for each corresponding battery cell (C11-CNM) of the respective set of corresponding battery cells (C11-C1M, C21-C2M, . . . , CN1-CNM), wherein said each corresponding battery cell (C11-CNM) is comprised in a respective first branch (71-7M) of said at least two first branches (71-7M), and
• wherein the corresponding battery cells of the respective set (C11-C1M, C21-C2M, . . . , CN1-CNM) of corresponding battery cells (C11-CNM) are corresponding to each other in that a respective second count of battery cells towards the first or second node (3, 4) from said each corresponding battery cell in the respective first branch (71-7M) is equal.