12-28-2007, 01:44 PM
your right dave,but the switch is for a parallel connection,in turn it hook up positive to positive,negative to negative=12 volts,bryon also mentioned that his battery was old,so it was about time
. Series Connections
Let's begin in Figure 1 with a simple box model showing the positive and negative terminals to represent the physical battery. We'll use this to relate to the physical connections between the batteries that you would use to construct a battery pack.
![[Image: series1.gif]](http://batterytender.com/images/series1.gif)
Figure 1: Single Battery Physical Model & Schematic Symbol[/b]
![[Image: series2.gif]](http://batterytender.com/images/series2.gif)
Figure 2: Batteries Connected in Series[/b]
Figure 2 shows two 12-volt batteries connected in series. The important things to note about a series connection are: 1) The battery voltages add together to determine the battery pack voltage. In this example the resulting pack voltage is 24 volts. 2) The capacity of the battery pack is the same as that of an individual battery. This assumes that the capacities of the individual batteries are the same. In fact, this is a must. Do not mix and match different size batteries in the same battery pack.
[url "http://batterytender.com/connecting.php/connecting.php/#top"]![[Image: button_top.gif]](http://batterytender.com/images/button_top.gif)
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3. Parallel Connections
![[Image: series3.gif]](http://batterytender.com/images/series3.gif)
Figure 3: Batteries Connected in Parallel [url "http://batterytender.com/images/largeseries3.gif"](Click to Enlarge)[/url]
Figure 3 shows two 12-volt batteries connected in parallel. The important things to note about a parallel connection are: 1) The battery pack voltage is the same as the voltage of the individual battery. This assumes that the individual battery voltages are the same. In fact, this is an absolute must. Do not mix and match different battery voltages in the same battery pack. In this example the battery pack voltage is 12 volts which is exactly the same as each of the individual 12-volt batteries. 2) The capacity of the battery pack is the sum of the capacities of the individual batteries. Again, make sure that all of the batteries are the same size, that is that they have the same amp-hour capacity.
[url "http://batterytender.com/connecting.php/connecting.php/#top"][/url]
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4. Series/ Parallel Connections
There are many ways to connect a group of batteries in both series and parallel at the same time. 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. It is not uncommon to have battery packs with several hundred volts and several hundred amp-hours.
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. In each of the examples, the 4 batteries are identified as A, B, C, and D. Example 1, shown in Figure 4, has 2 pairs of series connected batteries joined in a single parallel connection. In this type of arrangement, we refer to each pair of series connected batteries as a "string". Batteries A and C are in series. Batteries B and D are in series. The string A and C is in parallel with the string B and D. Notice that the total battery pack voltage is 24 volts and that the total battery pack capacity is 40 amp-hours.
![[Image: series4.gif]](http://batterytender.com/images/series4.gif)
Figure 4: Batteries Connected in Series / Parallel: Example 1 [url "http://batterytender.com/images/largeseries4.gif"](Click to Enlarge)[/url]
Example 2, shown in Figure 5, has 2 pairs of parallel-connected batteries joined in a single series connection. Batteries A and B are in parallel. Batteries C and D are in parallel. The parallel combination A and B is in series with the parallel combination C and D. Again, the total battery pack voltage is 24 volts and that the total battery pack capacity is 40 amp-hours.
![[Image: series5.gif]](http://batterytender.com/images/series5.gif)
Figure 5: Batteries Connected in Series / Parallel: Example 2 [url "http://batterytender.com/images/largeseries5.gif"](Click to Enlarge)[/url]
[url "http://batterytender.com/connecting.php/connecting.php/#top"][/url]
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. Series Connections
Let's begin in Figure 1 with a simple box model showing the positive and negative terminals to represent the physical battery. We'll use this to relate to the physical connections between the batteries that you would use to construct a battery pack.
Figure 1: Single Battery Physical Model & Schematic Symbol[/b]
Figure 2: Batteries Connected in Series[/b]
Figure 2 shows two 12-volt batteries connected in series. The important things to note about a series connection are: 1) The battery voltages add together to determine the battery pack voltage. In this example the resulting pack voltage is 24 volts. 2) The capacity of the battery pack is the same as that of an individual battery. This assumes that the capacities of the individual batteries are the same. In fact, this is a must. Do not mix and match different size batteries in the same battery pack.
[url "http://batterytender.com/connecting.php/connecting.php/#top"]
[/url][/url]
3. Parallel Connections
Figure 3: Batteries Connected in Parallel [url "http://batterytender.com/images/largeseries3.gif"](Click to Enlarge)[/url]
Figure 3 shows two 12-volt batteries connected in parallel. The important things to note about a parallel connection are: 1) The battery pack voltage is the same as the voltage of the individual battery. This assumes that the individual battery voltages are the same. In fact, this is an absolute must. Do not mix and match different battery voltages in the same battery pack. In this example the battery pack voltage is 12 volts which is exactly the same as each of the individual 12-volt batteries. 2) The capacity of the battery pack is the sum of the capacities of the individual batteries. Again, make sure that all of the batteries are the same size, that is that they have the same amp-hour capacity.
[url "http://batterytender.com/connecting.php/connecting.php/#top"]
[/url][/url]
4. Series/ Parallel Connections
There are many ways to connect a group of batteries in both series and parallel at the same time. 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. It is not uncommon to have battery packs with several hundred volts and several hundred amp-hours.
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. In each of the examples, the 4 batteries are identified as A, B, C, and D. Example 1, shown in Figure 4, has 2 pairs of series connected batteries joined in a single parallel connection. In this type of arrangement, we refer to each pair of series connected batteries as a "string". Batteries A and C are in series. Batteries B and D are in series. The string A and C is in parallel with the string B and D. Notice that the total battery pack voltage is 24 volts and that the total battery pack capacity is 40 amp-hours.
Figure 4: Batteries Connected in Series / Parallel: Example 1 [url "http://batterytender.com/images/largeseries4.gif"](Click to Enlarge)[/url]
Example 2, shown in Figure 5, has 2 pairs of parallel-connected batteries joined in a single series connection. Batteries A and B are in parallel. Batteries C and D are in parallel. The parallel combination A and B is in series with the parallel combination C and D. Again, the total battery pack voltage is 24 volts and that the total battery pack capacity is 40 amp-hours.
Figure 5: Batteries Connected in Series / Parallel: Example 2 [url "http://batterytender.com/images/largeseries5.gif"](Click to Enlarge)[/url]
[url "http://batterytender.com/connecting.php/connecting.php/#top"]
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