The cell of a nickel-hydrogen battery is a high-energy rechargeable cell with nickel as the positive electrode and hydrogen as the negative electrode. The advantages of NiMH batteries are that they have no memory effect, no pollution to the environment, and are environmentally friendly batteries. Compared with nickel-cadmium and lithium batteries of the same size, the unit price is moderate, the capacity is higher than that of cadmium batteries, and the weight is lower than that of lithium batteries. Heavier and lighter than cadmium, the disadvantage is high self-discharge rate

Taking EB-9008 battery as an example, the following briefly describes the use of Ni-MH battery

1. Battery performance: (battery charge and discharge voltage, current, time and ambient temperature)

1. Battery model: EB-9008

2. Battery specification: NI-MH AA1600

3. Nominal voltage: 7.2V

4. Nominal capacity: 1600mAh

5. Charging current: fully charged 0.1 C (charged with 160mA constant current for 15 hours)

                                 Standard charging 0.2～0.4 C (charging with 320mA constant current for 7.5 hours or 640mA constant current for 3.5 hours)

                                  Quick charge 1.0 C (1.2 hours at 1600mA constant current)

6. Discharge current: 0.2-1.0 C (discharge with 320mA current to end voltage 6.0V or 1600mA current to end voltage 6.0V)

7. Charging and discharging restrictions: the maximum charging control voltage is 9.6V, and the discharge termination voltage: 6.0V

8. Ambient temperature for charging and discharging:

Charging can be adapted to 0~50℃, and normal charging should be carried out at an ambient temperature of 20±5℃, otherwise it may not be fully charged;

Discharge can be adapted to -18 ~ 45 ℃, the same as the normal charging ambient temperature, only in the ambient temperature of 20 ± 5 ℃ to ensure normal use time

2. Precautions for the environment and time of battery shelving and storage:

1. The battery should be stored in a cool and dry environment with an ambient temperature of -20 to 30 °C;

2. Before the first use of the battery, a full charge-discharge pre-cycle is required to activate the battery;

3. The battery that has been shelved or stored should be activated by a full charge-discharge cycle for at least three months. Due to the high self-discharge rate of the Ni-MH battery, the battery is in an over-discharge state, shortening the battery life and reducing its performance;

4. The battery should be put on hold in an open state, and the battery should be removed from the machine when it is not in use to prevent damage caused by the battery being in an overdischarged state for a long time.

3. Battery configuration and charging instructions

1. When the battery is loaded into the machine or removed from the machine, please turn it off.

2. Please use NI-CD (nickel-cadmium) or NI-MH (nickel-metal hydride) special matching chargers. Unsuitable chargers may not be able to charge or not fully charged and will damage the battery.

4. When charging, it should be carried out at an ambient temperature of 20±5℃, otherwise it may not be fully charged with the rated power

5. A fully charged battery should be removed from the charger to avoid overcharging, shorten battery life and reduce performance.

6. The best way to use NiMH batteries is to fully charge them and discharge them when they are discharged, avoid charging and using them, and especially avoid overcharging and overdischarging, which will shorten battery life and reduce performance.

Fourth, safety warning:

Do not store batteries in damp, high temperature places.

Do not dispose of batteries in fire to avoid explosion.

Never short the battery terminals or reverse charge the battery.

Never disassemble the battery case.

Do not install batteries in hazardous environments.

Users should never touch the battery when their hands are wet.

Never use solvents such as benzene or banana water to clean the battery.

When the battery has noise, abnormal temperature, or leaks, please stop using it

Do not squeeze or hit the battery, otherwise the battery will heat up or catch fire

Five, battery quality assurance

1. The battery cell suppliers are all provided by qualified suppliers

2. Before the battery is assembled into a finished product, it is all distributed and matched, so that the voltage, capacity and internal resistance of each cell of the battery pack are consistent, and the overall performance of the battery can be better played.

3. The production of batteries is controlled by spot welding inspection, assembly inspection, finished product inspection and shipment inspection during the process to avoid the outflow of defective products.

4. The company provides customers with a 12-month effective use commitment, and if it is a human failure, it will be repaired or replaced in time

5. The effective service life of the battery complies with the standard of IEC61951-2 (2003) 7.4.1.1 ≥ 500 times. The method to quickly test the service life of the battery is to charge and discharge cycles with a constant current of 1500mA. Our battery life cycle guarantee ≥ 200 times, that is, after 200 cycles of charge and discharge tests, the test capacity of the battery is not less than 80% of the nominal capacity