Automatic weighing vacuum liquid injection system for power battery, and liquid injection method thereof

Abstract

The invention relates to an automatic weighing vacuum liquid injection system for a power battery, and a liquid injection method of the power battery; the automatic weighing vacuum liquid injection system is characterized by comprising a liquid storage and inlet module (1), a weighing module (2), a liquid injection module (3) and a control module; and electrolyte enters into the weighing module (2) through the liquid storage and inlet module (1) under the action of positive and negative pressure difference, and then is weighted by the weighing module (2), and injected into a battery cell (34) through the liquid injection module (3). The liquid injection module (3) comprises a liquid injection buffer device (33), so that no electrolyte is lost in the whole liquid injection process; all the electrolyte which is weighed in a weighing liquid storage tank is injected into the battery cell (34), and the weight of the battery does not need to be repeatedly weighed, so that the liquid injection speed is rapid, and the liquid injection quantity is accurate.

Description

Technical field

[0001] The invention belongs to the field of new energy power batteries, and particularly relates to an automatic weighing vacuum liquid injection system for power batteries and a liquid injection method thereof. Background technique

[0002] With the pursuit of power battery capacity and power, the internal reserved space of the battery is getting smaller and smaller, and the difficulty of liquid injection is also increasing. The traditional normal pressure injection method uses multiple injections, and generally requires 2-3 injections to meet the requirements of the injection volume. In order to ensure the injection volume, it needs to be weighed before and after each injection. The efficiency is very low and the injection The amount is not accurate. There are also some processes that use negative pressure injection, that is, the battery is first injected and then vacuumed. After this method, the battery injection speed has increased, but vacuuming the battery...

Examples

Embodiment Construction

[0029] The present invention will be further explained below in conjunction with the drawings:

[0030] figure 1 It shows a schematic structural diagram of an automatic weighing vacuum liquid injection system for a power battery, which is a preferred embodiment of various embodiments of the present invention. Including the liquid storage inlet module 1, the weighing module 2, the liquid injection module 3 and the control module; the liquid storage inlet module 1 stores the electrolyte to be injected, and when the injection is needed, the electrolyte is passed through the conveying pipe under the action of positive pressure Road transport to the weighing module. The weighing module 2 limits the weight of the electrolyte entering the weighing module, and the volume of each injection can be adjusted by adjusting the upper limit of the weighing. The lower end of the liquid injection module 3 is connected to the battery liquid injection hole. The vacuum injection method is used to v...

Technical field

[0001] The invention belongs to the field of new energy power batteries, and particularly relates to an automatic weighing vacuum liquid injection system for power batteries and a liquid injection method thereof. Background technique

[0002] With the pursuit of power battery capacity and power, the internal reserved space of the battery is getting smaller and smaller, and the difficulty of liquid injection is also increasing. The traditional normal pressure injection method uses multiple injections, and generally requires 2-3 injections to meet the requirements of the injection volume. In order to ensure the injection volume, it needs to be weighed before and after each injection. The efficiency is very low and the injection The amount is not accurate. There are also some processes that use negative pressure injection, that is, the battery is first injected and then vacuumed. After this method, the battery injection speed has increased, but vacuuming the battery...

Examples

Embodiment Construction

[0029] The present invention will be further explained below in conjunction with the drawings:

[0030] figure 1 It shows a schematic structural diagram of an automatic weighing vacuum liquid injection system for a power battery, which is a preferred embodiment of various embodiments of the present invention. Including the liquid storage inlet module 1, the weighing module 2, the liquid injection module 3 and the control module; the liquid storage inlet module 1 stores the electrolyte to be injected, and when the injection is needed, the electrolyte is passed through the conveying pipe under the action of positive pressure Road transport to the weighing module. The weighing module 2 limits the weight of the electrolyte entering the weighing module, and the volume of each injection can be adjusted by adjusting the upper limit of the weighing. The lower end of the liquid injection module 3 is connected to the battery liquid injection hole. The vacuum injection method is used to v...

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