| 摘要 |
PROBLEM TO BE SOLVED: To provide a charging and discharging system capable of reducing the voltage difference between battery cells.SOLUTION: A charging and discharging system according to the present invention includes: a first battery cell assembly including a first battery cell, a first connecting piece and a second connecting piece; a second battery cell assembly including a second battery cell, a third connecting piece and a fourth connecting piece; and a circuit board including a positive electrode end, a first connecting end, a second connecting end, and a grounded end. The first connecting piece connects a positive electrode of the first battery cell and the positive electrode end of the circuit board in series, the second connecting piece connects a negative electrode of the first battery cell and the first connecting end of the circuit board in series, the third connecting piece connects a positive electrode of the second battery cell and the second connecting end of the circuit board in series, and the fourth connecting piece connects a negative electrode of the second battery cell and the grounded end of the circuit board in series. The sum of the length of the third connecting piece and the length of the fourth connecting piece is greater than the sum of the length of the first connecting piece and the length of the second connecting piece, and the sum of the resistivity of the third connecting piece and the resistivity of the fourth connecting piece is smaller than the sum of the resistivity of the first connecting piece and the resistivity of the second connecting piece. |
