I previously posted a guide on a straightforward battery interlinking electronic source. This source involves a direct connection to the battery and a control sheet crafted for interlinking batteries. I shared the assembly process for this electronic battery spot in circuits commonly found in computer power supplies that utilize the ERL35 SMPS transformer. Essentially, it can be referred to as a basic SMPS circuit, employing two robust IRFP150s in the battery puncturing setup.
ELECTRONIC BATTERY PUNCTUATION CIRCUIT DIAGRAM
The primary winding of the ERL35 SMPS transformer consists of 2 × 3 or 2 × 4 turns of 1mm rectilinear wire, with two parallel connected windings. This configuration resembles the winding pattern found in DC-DC converter circuits commonly used in automotive amplifiers, specifically in SMPS transformers with toroid cores.
The secondary winding responsible for generating voltage for battery puncturing is constructed with a single-turn double-stranded copper plate. An epoxy plaque is placed between the winding and the copper strips to provide insulation. Typically, such insulating layers are positioned between the high-voltage windings, although they might not be present in budget-friendly power supply setups. For the puncturing process, copper rods are used, and the metal piece inside the clamps is directly soldered onto the copper strip.
In computer power supplies, you can find the L1 coil with a value of 47μH. It has a pitch of 0.8mm and consists of 2 parallel windings, approximately 20 turns. Additionally, the 25pi component is present on the 3.3V output of ATX power supplies, although it may not be included in every model.
Regarding the C1 capacitor, it is a 2.2uF 400V capacitor that appears to be non-polarized. Alternatively, on the schematic, you can use a 1uF 400V capacitor or connect two 1uF 400V capacitors in parallel. It’s worth noting that the schematic does not include a 12V 1W Zener diode used in the application.
For power sources, batteries or lithium-ion battery packs can be utilized.
The primary drawback of battery puncturing lies in the trigger section S1, which is activated by pressing a push button. However, an issue arises if the button is held down for an extended period.
An SMPS power supply functions by converting power from a source, typically an AC outlet, into a DC output for a device. What distinguishes the SMPS is its capability to regulate the output voltage. It can adjust the output voltage as needed, ensuring a consistent output even when there are fluctuations in the load.