In modern life, batteries, as portable power supplies, play an indispensable role.No. 5 alkaline batteryWith its stable performance and wide application, it has become the preferred power supply for many electronic devices.No. 5 alkaline battery, also known asAA battery, is a common dry cell, which uses alkaline potassium hydroxide as electrolyte.They are popular because of their large capacity, stable discharge and high cost efficiency.Widely used in remote control, flashlight, wireless mouse, keyboard, children's toys, portable audio, sphygmomanometer and other products.
Recently, the battery trading network has purchased a batch ofNo. 5 alkaline battery, this time, let's test itPanasonicNo. 5 alkaline batteryThe in-depth evaluation will be carried out from three aspects: discharge, internal resistance and temperature. Now let's follow the small editor to explore the performance of this No. 5 alkaline.
Appearance introduction
As usual, let's take a look at the appearance and specifications of the battery first.
PanasonicNo. 5 alkaline batteryIt is designed as a cylinder, and the overall color of the film is golden yellow and gradually red. The black background is used in the middle of the "Panasonic" logo to highlight the brand.
PanasonicThe other side of the No. 5 alkaline battery has silk screen instructions:
Battery model: LR6BCH, positive and negative pole identification;
Nominal voltage: 1.5V;
Battery type: alkaline battery, mercury free.
There are danger and warning statements at the bottom.
PanasonicThe negative contact surface of No. 5 alkaline battery is made of alloy metal, which is durable and anti-corrosion.
PanasonicThe positive contact surface of No. 5 alkaline battery is still made of alloy.
Using plastic calipers, the height of Panasonic No.5 alkaline battery cylinder is about 50.1mm.
Using a plastic caliper, the diameter of Panasonic No.5 alkaline battery is about 13.9mm.
Panasonic No. 5 alkaline battery is between No. 7 battery and 18650 cell.
The Panasonic No. 5 alkaline battery is smaller in diameter than the one yuan coin.
Panasonic No.5 alkaline battery weighs about 23.2g.
Panasonic No.5 alkaline battery is compared with the palm of an adult man.
Discharge test
After looking at the appearance, get to the point;Battery trading network is tested according to GB/T 8897.2-2021 standard.
This time, according to GB/T 8897.2-2021AA batteryThe characteristics and electrical performance requirements shall be tested according to the discharge standards of radio and clock remote controller. The current shall be 50mA and the cut-off voltage shall be 1V.
50mA discharge test
Draw a broken line diagram, set the current as 50mA, discharge the Panasonic No. 5 alkaline battery, and equalize the voltage at 1.27V. The cut-off voltage is 1V. It takes about 51 hours and 38 minutes, and the discharge capacity is 2582mAh. The energy released during the 50mA discharge process is 3.27Wh, which conforms to the energy release calculation formula: energy=capacity * voltage sharing (2582mAh * 1.27V ≈ 3.27Wh).
Internal resistance test
In the internal resistance test part, the battery trading network will use the internal resistance test instrument to test the full power internal resistance and empty power internal resistance respectively.
Summarizing the test data to the table, it can be seen that the full power internal resistance voltage is 1.6V, and the empty power internal resistance voltage is 1.0V. The nominal internal resistance of Panasonic No. 5 alkaline battery is unknown.
Draw the histogram, and it can be seen that the 1.6V full power internal resistance is 70m Ω, and the 1.0V air power internal resistance is 448m Ω. It can be seen that the internal resistance under the full power state does not exceed the nominal internal resistance, and the full power internal resistance under the empty power state has a large difference.
Temperature test
In the temperature test part, the battery trading network will measure the temperature 30 minutes after the 50mA discharge.
Discharge temperature test
50mA discharge
The Panasonic No.5 alkaline battery was discharged at 50 mA for 30 minutes, and the maximum surface temperature was about 27.8 ℃.
Summary of Battery Trading Network
This Panasonic No.5 alkaline battery was tested by the Battery Trading Network with a discharge current of 50mA. After 51 hours and 38 minutes, the battery discharged 2582mAh and 3.27Wh. It can be seen that the energy density of AA cell is lower than that of lithium battery.
Internal resistance and temperature performance, first of all, the internal resistance is 70m Ω at 1.6V full charge and 448m Ω at 1.0V empty charge. It can be seen that the internal resistance does not exceed the nominal internal resistance at full charge, and the internal resistance at full charge differs greatly at empty charge, which is reasonable for disposable batteries;In terms of temperature, the maximum surface temperature is 27.8 ℃ after 30 minutes of 50 mA discharge current, the surface heating is not obvious, and the temperature is well controlled.
On the whole, Panasonic No.5 alkaline battery proved its reliability and applicability as a disposable battery with its stable discharge performance, reasonable internal resistance level and good temperature control.Whether in remote control, flashlight, wireless mouse, keyboard, children's toys, portable audio, sphygmomanometer and other devices, this battery can provide a lasting and stable energy supply.