Existing lithium-ion batteries used in vacuum liquid injection process injection of machines can be broadly divided into two categories:
One is suck the liquid injection mode, the principle is to be priming the battery into a container filled with the electrolyte, and then the vessel was evacuated to a vacuum state, the use of containers or vacuum drying gas alternately input electrolytic was drawn into the battery. The way to achieve the kind of pouring the electrolyte into the object within the cell, however, there are two problems with this approach, one surface of the battery case body after injection of the electrolytic solution remaining large amount of electrolyte, which wastes a lot of electrolyte;
II is easy to make in this manner is injected into the interior of the battery and the injection amount of the liquid electrolyte predetermined amount of liquid required to produce a large variation, resulting in a large error injection amount of the liquid; liquid injection quantity can not be guaranteed and each battery We are equal. The other is rotary pouring machine, which is installed at the close Hoi Pa pump metering the turntable, the turntable rotation control vacuum suction vacuum vessel and the electrolyte was injected dry gas alternately, driven vacuum vessel the electrolytic solution is sucked into the inside of the battery case, to achieve the purpose of injecting the electrolytic solution. However, this approach only when the vacuum inside the battery, the injection liquid, when the internal battery electrolyte into the vacuum of space, since there is inevitably a small amount of dissolved gas within the electrolyte, then in the injection port unit forming a large number of bubbles, the influence of the electrolytic cell infiltration, pouring speed this way the injection liquid can not be quickly injected only slowly, therefore, that injection of the injection speed is relatively slow.
When used in the receiving slot into the battery, and the battery mounted on the upper portion of the drip device, loaded quantitative within the filled liquid electrolyte, a hermetically sealed box, inside the box to seal vacuum, After reaching the vacuum, again sealed boxes filled with dry gas, so that the pressure is greater than atmospheric pressure inside sealed boxes, containing liquid electrolyte into the battery inside. Since the front of the utility model in a vacuum, which would deal with the electrolyte sealed boxes, so vacuum, not only can the air out of the battery, while the gas is dissolved in the electrolyte will be withdrawn, so that when to seal the cabinets added to the dry air, and the formation of high pressure, the gas does not dissolve within the electrolyte solution, it will not form bubbles in the mouth of the battery, the electrolyte is prevented to enter, so, not only within the electrolyte into the battery faster speed , but also a good infiltration into the electrode film battery pole piece. Thus, the utility model has the pouring speed, good wetting effect, and the advantages of precise measurement.