Battery Pack Calculator

📚 Reference & Problem

Equations:

n_s = v_p / v_c

n_p = Ah_p / Ah_c

n_t = n_p × n_s

w_p = w₁ × n_t

e_p = v_p × Ah_p

C_r = I_cc / Ah_c (cell C rate)

C_r = I_cp / Ah_p (pack C rate)

P_cr = v × I_cp

t = E_p / P_cr (charging time)

Variables:

n_s Number of cells in series

n_p Number of cells in parallel

n_t Total number of cells in battery pack

v_p Pack voltage (V)

v_c Cell voltage (V)

Ah_p Pack capacity (Ah)

Ah_c Cell capacity (Ah)

w_p Weight of cells in pack (kg)

w₁ Weight of 1 cell (kg)

E_p Energy of pack (Wh)

C_r C rate (charging/discharging rate)

I_cc Current at C rate for cell (A)

I_cp Current at C rate for pack (A)

P_cr Power at C rate (W)

t Charging time (hours)

Current Problem:

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🧮 Calculator

Number of cells in series (n_s):

Number of cells in parallel (n_p):

Total number of cells (n_t):

Pack voltage (v_p) [V]:

Cell voltage (v_c) [V]:

Pack capacity (Ah_p) [Ah]:

Cell capacity (Ah_c) [Ah]:

Weight of cells in pack (w_p) [kg]:

Weight of 1 cell (w₁) [kg]:

Energy of pack (E_p) [Wh]:

C rate (C_r):

Current at C rate for cell (I_cc) [A]:

Current at C rate for pack (I_cp) [A]:

Power at C rate (P_cr) [W]:

Charging time (t) [hours]: