A Quick Method for Measuring Clock Battery Capacity
A technology of battery capacity and battery remaining capacity, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of ignoring the research of complex electrochemical reactions, the meter cannot work, and the measurement time is long, so as to achieve fast measurement speed, The effect of short time and simple measurement method
Active Publication Date: 2019-12-13
武汉昊诚锂电科技股份有限公司 +1
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Problems solved by technology
[0021] (3) Current integration method: the integration method is used to detect the energy entering or releasing the battery in real time for a long time, so as to give the remaining capacity of the battery at any time. The study of complex electrochemical reactions, this method is mainly used in secondary batteries, it is not suitable for the study of relatively small primary batteries, and the measurement time is long, for clock batteries, it takes 2-10 days testing time;
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[0082] The method for quickly measuring the capacity of a clock battery with a rated capacity of 1200mAh (ER14250 battery, used as a clock battery in the single (three) smart meters of the State Grid) as an example is described, and the method for quickly measuring the capacity of a clock battery with other rated capacities Also instructive.
[0083] Including the following steps:
[0084]Step 1: Measure the open-circuit voltage of the clock battery, take the clock battery out of the meter, and measure the open-circuit voltage Voc of the clock battery after the clock battery has stood still for 20-40 minutes. When Voc≤3.60V, the remaining capacity of the clock battery is less than 15%; When Voc ≥ 3.64V, the remaining capacity of the clock battery is greater than or equal to 15%, and the next step is performed in an environment of 15-30°C;
[0085] Step 2: Eliminate the LiCl passivation film on the negative pole of the clock battery, solder the left and right ends of the 330Ω ...
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The invention discloses a method for quickly measuring the battery capacity of a clock. The method comprises the following steps: measuring an open-circuit voltage of a clock battery, eliminating an LiCl passivation film of the negative electrode of the clock, and enabling the left and right ends of a 330-ohm resistor to be respectively welded to pins of the positive electrode and the negative electrode of the clock battery, wherein the battery is in a power-off state in a process that the 330-ohm resistor is taken down and the pins of the positive electrode and the negative electrode of the clock battery are pulled out; measuring the voltage value after the discharging of the clock battery, placing the clock battery on a battery tester after the clock battery is quietly placed for 20-40min, and setting a discharge program of the battery tester; reading the voltage value V1 of the clock battery at the T-th second after the discharging of the clock battery; carrying out the preprocessing of the clock battery, the centrifugal treatment of which needs to be carried out, and placing the battery into a desk-type electric centrifugal machine in an inverted manner; carrying out the centrifugal treatment of the clock battery; and calculating the remaining capacity of the clock battery. The method is simple in operation, and is higher in measurement speed.
Description
technical field [0001] The invention relates to the field of clock batteries, more specifically it is a method for quickly measuring the capacity of clock batteries. Background technique [0002] Lithium sub-battery has the advantages of high voltage, high specific capacity, high specific energy, long storage life, low self-discharge rate, wide temperature range, stable discharge voltage, etc., which makes lithium sub-battery widely used in various meters. Acts as a clock battery in the meter. [0003] The clock battery refers to the battery that provides power for the corresponding circuits and devices of the real-time clock module in Q / GDW 11179.7-2014. It is a lithium-thionyl chloride battery, referred to as "lithium sub-battery". [0004] Reaction mechanism of lithium sub-battery: [0005] The negative electrode of lithium sub-battery is made of lithium foil, which is closely attached to the inner wall of stainless steel; the diaphragm is made of alkali-free glass wool...
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IPC IPC(8): G01R31/385
CPCG01R31/385
Inventor 喻赤平于力阮红林
Owner 武汉昊诚锂电科技股份有限公司