| Series parallel connection of battery pack |
| Date：2020-12-09 Hits：525 |
| How to calculate the number of batteries in series and how many cells are needed? Answer 1: very simple. The standard voltage of ternary lithium is 3.7V, full of 4.2V, three series is 12V, 48V requires four three series, but electric vehicle lead-acid battery is the most charged 58V, so lithium battery also needs to reach about 58V, so it needs 14 series to 58.8v, 14 times 4.2, iron lithium full charge about 3.4V, need four series 12V, 48V need 16 For example, 60 V requires 20 series, parallel connection of the same model and capacity, 10 ah cells in parallel is 20Ah, 48V ternary lithium requires 14 + 14 10Ah cells, and the last 14 parallel good series connection constitutes 48v20ah lithium battery. Answer 2: in fact, it is very simple. For example, 48 V refers to the voltage. Generally, the ternary lithium battery refers to 48 divided by 3.7. In this way, 13 strings and 14 strings are calculated as 48 v. the 13 strings are charged with 54.6 V chargers and 14 strings are charged with 58.8 V chargers. As for 20 ah, it refers to the capacity of the battery. If it is a single 18650 cell with a capacity of 2000 Ma, then it will be 2 ah for each cell, and 10 cells together will be 20 ah, and the whole set of batteries will be 14 strings multiplied by 10 cells = 140 cells. The same is true for 60 v. usually, the 16-17 series is calculated as 60 v. if it is 60 V and 20 A, the capacity of a single cell is 2000 Ma, that is, 16-17 times 10160-170 cells. It should be clear to see here Iron lithium battery is the total voltage divided by 3.2. For example, 48 volt iron lithium refers to 15-16 strings. The algorithm is the same, but the iron lithium battery is several more than ternary lithium battery, and the charging voltage of iron lithium and ternary lithium are also different. We should communicate with the boss when buying. Is parallel connection or series connection first? Answer: first merge, then string |
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