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A test method for short-circuit resistance of agm separator

A technology of anti-short circuit ability and detection method, which is applied in the direction of circuits, measuring electronics, measuring devices, etc., to achieve the effects of accelerating deposition, reducing specific gravity, and accelerating short circuit phenomena

Active Publication Date: 2019-01-18
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The ability of the separator to resist short-circuit by penetration is crucial to the battery, but there is no test method to determine the short-circuit resistance of different separators

Method used

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  • A test method for short-circuit resistance of agm separator
  • A test method for short-circuit resistance of agm separator
  • A test method for short-circuit resistance of agm separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Supplementary electricity: Assemble the No. 1 separator with a certain thickness into a 6-DZM-20 electric bicycle battery, add acid to the battery in a certain amount, and charge it with a current of 2.0A for 11 hours.

[0042] 2. Over-discharge: first discharge to 6V with 10A, then connect a 10W light bulb, and place it in a water bath at 60°C for 60 days.

[0043] 3. Constant voltage and current limiting charging: Then charge the battery at room temperature, charge at 2.45V, 1C for 10 minutes, then charge at 2.45V, 0.1C, record the current value of the battery at the constant voltage charging stage, see the results for details figure 1 . The current value at the end of charging is 0.286A. The end of charging refers to the period when the current of the battery hardly changes or the current changes less than 5% after 15 hours of charging.

Embodiment 2

[0045] 1. Supplementary electricity: Assemble the No. 1 separator and polar plate of a certain thickness into a 6-DZM-20 electric bicycle battery, add acid to the battery in a certain amount, and charge it with a current of 2.0A for 11 hours.

[0046] 2. Over-discharge: first discharge to 6V with 10A, then connect a 10W light bulb, and place it in a water bath at 60°C for 60 days.

[0047] 3. Constant voltage and current limiting charging: Then charge the battery at room temperature (2.45V, 0.1C), and record the current value of the battery in the constant voltage charging stage. For details, see figure 2 . The current value at the end of charging is 0.05A.

[0048]From the results of Example 1 and Example 2, it can be seen that the greater the initial current value, the greater the current value at the end of constant voltage charging. The main reason is that the specific gravity of the sulfuric acid electrolyte is very low after the battery is over-discharged, which is al...

Embodiment 3

[0050] 1. Supplementary electricity: assemble the No. 1 separator with a certain thickness into a 6-DZM-20 electric bicycle battery, and charge the battery with a current of 1.2A for 10 hours after the formation is completed.

[0051] 2. Over-discharge: First discharge to 6V with 10A, then connect to a 10W light bulb, and place it in a water bath at 40°C for 60 days.

[0052] 3. Constant voltage and current limiting charging: Then charge the battery at room temperature, charge at 2.45V, 1C for 5 minutes, then charge at 2.45V, 0.1C, record the current value of the battery at the constant voltage charging stage, see the results for details image 3 . The current value at the end of charging is 0.266A.

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Abstract

The invention discloses a detection method for the anti-short circuit capability of an AGM separator, which belongs to the field of material detection. The detection method comprises the following steps: (1) assembling the separator to be tested and the polar plate into a battery, and charging the battery; (2) over-discharging the battery; (3) charging the over-discharged battery at a constant voltage, Record the current value at the end of charging, which represents the short-circuit resistance of the separator to be tested. The present invention performs deep discharge on the battery under high temperature conditions, reduces the specific gravity of the sulfuric acid electrolyte in the battery, thereby increasing the solubility of lead sulfate, and adopts a large current at the initial stage of constant voltage charging, resulting in a significant change in the specific gravity of the electrolyte, resulting in The deposition of lead sulfate accelerates the occurrence of short circuit. The detection result of the method of the invention can accurately reflect the performance of the AGM separator.

Description

technical field [0001] The invention relates to the field of material testing, in particular to a method for detecting short-circuit resistance of an AGM separator. Background technique [0002] Lead-acid battery is one of the most widely used batteries at present, and its development has lasted more than 150 years since the 19th century. In the long history of lead-acid battery evolution, lead-acid batteries suitable for different purposes have emerged. [0003] There are two main methods for valve-regulated sealed batteries. One is to add silicon dioxide to form a colloid in the sulfuric acid electrolyte. The colloid forms cracks during charging and discharging to realize the circulation of oxygen and achieve the effect of sealing. Another way is to use AGM separators. By controlling the acid content of the battery (saturation of the separators), the separators are in an incompletely saturated state, that is, there are a certain amount of gaps that are not filled with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36H01M10/12H01M10/42
CPCG01R31/385H01M10/121H01M10/42Y02E60/10Y02P70/50
Inventor 郭志刚张峰博梅园方广民黄建忠孔春凤陈跃武
Owner TIANNENG BATTERY GROUP
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