What are the consequences of jump-starting a 12V car with 24V?
1 Answers
Jump-starting a 12V car with 24V may have the following consequences: During the charging process, there is a possibility of excessive heat, burned wiring, damaged charger, or battery failure, among other issues. To charge a 12V battery with 24V, several conditions must be met: 1. The charger must be an intelligent type: Generally, direct charging is not recommended unless the 24V charger has built-in current-limiting and voltage-stabilizing control circuits. Such chargers are considered intelligent and can be used for charging. 2. Possess certain hands-on skills and relevant circuit knowledge: If the charger lacks the above functions but charging is still necessary, the wiring must be modified manually. This requires some hands-on ability and knowledge of circuits. Battery charging requires external charging equipment (such as a charger) with constant current and voltage. In the absence of relevant control circuits, external rectifier circuits (such as bridge rectifiers) can be connected at the output end to achieve the goal. 3. Calculate the required normal charging current: Simply put, the normal charging current can also be calculated based on the charger's power and the battery's power. Using a non-intelligent charger (without control circuits) to charge a 12V battery may cause the battery to "boil" immediately, leading to severe consequences. Therefore, a calculated approach can be adopted, such as directly connecting a variable resistor or several parallel 7815 regulators in series to achieve the desired result.
