Activation method and device for activating primary lithium battery in pulse mode

Abstract

The invention relates to an activation method and a device for activating a primary lithium battery in a pulse mode, and belongs to the technical field of electronic measurement. The method comprises a first step of loading an open circuit electrode switch and a resistor on two poles of a battery, and a second step of switching a current pulse signal to the two poles of the battery by controlling of the on-off states of the open circuit electrode switch, wherein the switch-on time of the open electrode switch is 0.5-1.5 seconds per time. The invention further discloses the device for activating the primary lithium battery in a pulse mode, wherein the device is designed according to the method. The activation method and the device are ingenious in design, and activation time is reduced. A passive film can be fully pierced through the pulse activation, and the hysteresis phenomenon does not exist. Battery capacity fading is reduced, pulse time can be disintegrated, and continuous production is benefited.

Description

technical field [0001] The invention belongs to the technical field of electronic measurement, and in particular relates to an activation method and a device for pulse activation of a primary lithium battery. Background technique [0002] At present, the voltage detection method of primary lithium batteries in China is as follows: open circuit voltage detection (device is a measuring motor) - load activation (device is a discharge cabinet) - load voltage detection (device is a measuring motor), three devices and three operators are required Operation, in which the load activation takes 15 minutes to 1 hour, and the voltage detection takes 1.5 seconds. The operation process is long, which is not conducive to industrial continuous production. [0003] In the existing detection methods, the most time-consuming station is the load activation, which is generally loaded with 330Ω, 200Ω or 56Ω resistors (different resistance values ​​are selected depending on the battery model), th...

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Problems solved by technology

[0002] At present, the voltage detection method of primary lithium batteries in China is as follows: open circuit voltage detection (device is a measuring motor) - load activation (device is a discharge cabinet) - load voltage detection (device is a measuring motor), three devices and three operators are required Operation, in which the load activation takes 15 minutes to 1 hour, and the voltage detection takes 1.5 seconds. The operation process is long, which is not conducive to industrial continuous production

[0003] In the existing detection methods, the most time-consuming station is the load activation, which is generally loaded with 330Ω, 200Ω or 56Ω resistors (different resistance values ​​are selected depending on the battery model), the purpose is to pierce the blunt battery inside the battery with a certain current. Passivation film, the higher the current, the easier the passivation film is to open

There are two main types of existing load activation: 1. Continuous activation with high current (small resistance), the time is 3 minutes to 5 minutes, the passivation film is completely pierced, the battery is in an activated state, there is no hysteresis, and the battery capacity decays more (3%-5%), high-current discharge has a very high time requirement, and if the time is too long, the battery capacity will be consumed too much; 2. The continuous activation of small current (large resistance) takes 15 minutes-1 hour, and the battery capacity decays relatively quickly. Less (2%-3%) time is too short, the passivation film cannot be pierced, the passivation film is not pierced completely, the battery is in a semi-activated state, and the battery has hysteresis

Small current continuous activation and high current continuous activation are not conducive to continuous production because of their long time and continuous activation time, which cannot be decomposed

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