Should the positive or negative terminal be connected first when jump-starting a car battery?
1 Answers
When jump-starting a car battery, the positive terminal should be connected first. Detailed information about battery connection is as follows: 1. A car battery, also known as a storage battery, is a type of battery that converts chemical energy into electrical energy. The commonly referred car battery is a lead-acid battery, which is primarily made of lead and its oxides with sulfuric acid solution as the electrolyte. 2. When connecting a battery for charging, first connect the positive terminal, then the negative terminal. After starting, disconnect the negative terminal first, followed by the positive terminal. This is because the entire vehicle body is connected to the battery's negative terminal, making the negative terminal area effectively larger throughout the vehicle, while the positive terminal area remains small (only the size of the battery terminal post). Reversing this connection order can easily cause short-circuit hazards. 3. Car batteries are rechargeable batteries. After discharging, they can be reused after charging. Types include lead-acid batteries, nickel-iron batteries, and nickel-cadmium batteries. In lead-acid batteries, the positive electrode is lead dioxide, the negative electrode is lead, and the electrolyte is dilute sulfuric acid solution. During discharge (use), both electrodes react with sulfuric acid to form lead sulfate. When the sulfuric acid concentration drops to a certain level, the battery must be recharged. External power charging can restore the electrodes and electrolyte to their original state, allowing continued use after charging.
