Why does the total capacity of battery in parallel need to add up but that in series remain the same?

The series connection of the battery only increases the voltage as the number of batteries increases. For example, four 12V250AH batteries are connected in series, and the obtained voltage is 12V×4=48V. It does not increase its output current, that is, its capacity is 48V250AH. The battery can only be connected in parallel to increase its output current. Just like the 48V1000AH you want, you need to use 16 12V250AH batteries. Each 4 batteries are connected in series, and then the 4 groups of batteries connected in series are connected in parallel. Get the battery capacity you want. The battery string must be used, and the battery must have the same voltage and the same capacity. Otherwise, because the voltage is different or the capacity is different, the charging and discharging will be uneven. The battery with low voltage and small capacity will be scrapped in advance.

Just adding the voltage series, such as two 250AH12V accumulator batteries connected in series after the battery is a 250AH24V

Parallel connection is the capacity addition. For example, two 250AH12V batteries are connected in parallel to be a 500AH12V battery.

The battery is connected in parallel to increase the capacity and the voltage does not change.

Increase the voltage in series, the capacity is the same! The total power is constant regardless of whether the cells are connected in parallel or in series.

For example, if your electric car has 4 batteries in series, 48V will run 40km/hour, but if you run for an hour, there will be no electricity! In other words, your total distance is 40 kilometers! If it is 4 parallel, the voltage is still 12V, this time the car can only run at 10 km / h, but can run 4 hours, the total distance is also 40 km!

Whether in parallel or in series, the total power does not change.

The parallel voltage is constant and the currents are added.

The series voltages are added and the current is unchanged.

The capacity should be the same as the total power.

Regardless of whether it is a string or a string, the capacity should be constant.

The series voltages are added and the capacity is constant; the parallel capacity is added and the voltage is constant.

The battery of the same capacity is connected in series, the voltage is increased, and the capacity is unchanged. The batteries of different capacities are connected in series, the voltage is added, and the capacity is small. (This method is not recommended, otherwise it will cause excessive charging and discharging of the small capacity battery and early damage.)

Calculated according to 24V: 60W current is 60/24=2.5A, the required safety hours = 2.5*12*3=90AH.

The amount of electricity discharged by the battery under specified conditions (including discharge intensity, discharge current and discharge termination voltage) or the length of discharge time is called battery capacity, and the unit is A·h or A·min. A car battery is a reversible DC power source that converts chemical energy into electrical energy and electrical energy into chemical energy. It is connected in parallel with the generator.

It supplies power to the starting system and the ignition system during engine start.

When the engine stops or runs at slow speed, it supplies power to the vehicle's electrical equipment.

When there is a demand for electricity exceeding the output of the charging system, it provides current for a limited period of time.

The battery also absorbs the transient overvoltage in the circuit to keep the voltage of the automotive electrical system stable and protect the electronic components.

If the battery is not used for a long time, it will slowly discharge itself until it is scrapped. Therefore, the car should be started once every certain time to charge the battery. Another method is to pull out the two electrodes on the battery. It is necessary to remove the positive and negative electrode wires from the electrode column. First, unplug the negative wire or remove the connection between the negative electrode and the chassis of the car. Then remove the other end with the positive mark (+). The battery has a certain service life and will be replaced in a certain period of time. The same order should be followed when replacing, but when the electrode wires are connected, the order is reversed, first connected to the positive electrode and then to the negative electrode.

When the ammeter pointer indicates that the storage capacity is insufficient, it should be charged in time. The storage capacity of the battery can be reflected on the instrument panel. Sometimes the power is not enough on the road, and the engine can't start. As a temporary measure, you can ask other vehicles for help. Use the battery on the vehicle to start the vehicle, connect the negative and negative poles of the two batteries, and connect the positive pole to the positive pole. .

The density of the electrolyte should be adjusted according to the standards according to different regions and seasons.

Distilled water or special rehydration solution and nano-carbon sol battery activator should be added when the electrolyte is deficient. Never use pure water instead. Because pure water contains a variety of trace elements, it will have an adverse effect on the battery.

Uninterrupted use of the starting opportunity when starting the car causes the battery to be damaged due to excessive discharge. The correct method of use is to take no more than 5 seconds for each time the car is started, and the interval between starts again is not less than 15 seconds. In the case of multiple starts and still not in the car, you should find the reason from other aspects such as circuit, ignition coil or oil circuit.

Always check the small holes in the battery cover for ventilation when driving daily. If the small hole of the battery cover is blocked, the generated hydrogen and oxygen will not be discharged, and when the electrolyte expands, the battery case will be broken and the battery life will be affected.

Check the positive and negative levels of the battery for signs of oxidation. You can use hot water to constantly pour the wire connection of the battery.

Check the presence or absence of aging or short-circuiting in all parts of the circuit to prevent the battery from being decommissioned early due to excessive discharge.

Over discharge

2. The battery is stored for a long time (not charged during storage)

3. Cannot be charged by car engine

4. No electrolyte

5. The electrolyte is too high

6. Charging under high temperature conditions

7. Contaminated by contaminated materials (such as hydrochloric acid, sea water, organic acids, etc.)

8. Add excessive current when charging the battery

9. The deformation of the electrode plate causes the positive plate and the plate to contact each other, thus causing a short circuit.

10. Deposits on the upper and lower parts of the pole, causing a short circuit

11. As long as you pay attention to avoid the above points, the service life of your battery will increase accordingly.