#BATTERY STATUS IN PARALLEL CONNECTION SERIES#

#BATTERY STATUS IN PARALLEL CONNECTION SERIES#

Then those two parallel-connected sets of batteries are connected in series by a single wire connection. What you have is two sets of two batteries each connected in parallel. But this battery pack is configured like example 2 in the previous section. Again, the blue wire designated W1 serves the same charge voltage drop imbalance function that it did in Figure 9.įigure 12 again shows two 12 volt chargers connected to a series / parallel battery pack. Even without those special charging features, the single 24-volt charger in this arrangement does a better job than two 12-volt chargers would. There are some intricate details of charging algorithms that are specifically optimized to account for and eliminate the individual battery voltage imbalance in large series strings. This method is definitely better than the arrangement shown in Figure 10 because the imbalance in individual battery voltages is not as much of a concern. The diagram shown in Figure 11 is an acceptable way to charge a combination series / parallel battery pack. Notice that the total battery pack voltage is 24 volts and that the total battery pack capacity is 40 amp-hours.įigure 11: Four Batteries in Series / Parallel (Example 1), One Charger The string A and C is in parallel with the string B and D. In this type of arrangement, we refer to each pair of series connected batteries as a 'string'.

Example 1, shown in Figure 4, has 2 pairs of series connected batteries joined in a single parallel connection. In each of the examples, the 4 batteries are identified as A, B, C, and D. Just to get an idea of how these connections can be made, we'll look at two examples, with 4 batteries each, using 12 volt, 20 Ah batteries. It is not uncommon to have battery packs with several hundred volts and several hundred amp-hours. This is common practice in many battery power appliances, particularly in electric vehicles and large UPS systems where the battery packs require large voltages and amp-hour capacities. The switch circuit is turned on with a discharge stopping signal of the second charge/discharge control circuit.There are many ways to connect a group of batteries in both series and parallel at the same time. The battery device includes a first charge/discharge control device including a first charge/discharge control transistor, and a first charge/discharge control circuit configured to detect the voltage of a secondary battery to control charging and discharging a second charge/discharge control device including a second charge/discharge control transistor connected to an external terminal via the first charge/discharge control transistor, and a second charge/discharge control circuit configured to detect the voltage of the secondary battery to control charging and discharging and a switch circuit arranged between an overcurrent detection terminal of the second charge/discharge control circuit and the external terminal. Abstract: Provided is a battery device high in safety and ease of use, which has no difficulty in returning to a normal state after discharge overcurrent is detected.

Battery status in parallel connection