Clamp type pressurizing device for formation and capacity grading ofsquare battery cell

Abstract

The invention provides a clamp type pressurizing device for formation and capacity grading of a square battery cell. The clamp type pressurizing device comprises a clamp type tray, a support frame, a pressurizing connecting mechanism and a plurality of trays, the plurality of trays are movably connected to the support frame, and the plurality of trays are connected together to realize linkage; the pressurizing connecting mechanism is connected to one of the trays; the pressurizing device comprises a driving device and a fixed seat; the driving device is fixedly connected to the fixed seat; the output end of the driving device is detachably connected to the pressurizing connecting mechanism; and the pressure detection device is used for detecting the pressure borne by the tray. The tray is pressurized through the pressurizing device, the pressure on the tray is detected through the pressure detection device, and the pressure applied by the pressurizing device can be adjusted in time, so that the applied pre-tightening force is more uniform, more stable and optimal.

Description

【Technical field】 [0001] The invention relates to the technical field of cell formation and capacity, in particular to a clamp-type pressurizing device for square cell formation and capacity. 【Background technique】 [0002] The shell of the square cell is generally made of aluminum, and the battery module is composed of several to hundreds of cells connected in parallel and in series. To a certain extent, the performance of the battery cell determines the performance of the battery module and then affects the performance of the entire power battery system. Therefore, it is very important to ensure the uniform heat dissipation of the battery cell and the module during the chemical composition and capacity, and to ensure the consistency of the battery cell. Important, it is related to the life and safety of the battery system. [0003] When the lithium battery is divided into capacity, it is necessary to pass a large current between the positive and negative electrodes of eac...

AI Technical Summary

Problems solved by technology

[0006] 1. During the charge and discharge process of composition and capacity, gas is generated along with the chemical reaction inside the battery, which may easily cause the front and rear ends of the battery to bulge and deform, and the inconsistent appearance will affect the life and safety of the battery system. The existing square battery For the core-forming and capacity equipment, because the bandage is used to fix the battery core, the bandage cannot properly pressurize the battery core, cannot limit the swelling of the battery core, and cannot keep the shape of the battery cell consistent

[0007] 2. Square batteries are assembled into modules and are often tied with bandages. Due to the different dimensions of the batteries, the binding pre-tightening force of the bandages is inconsistent, and the bandages cannot accurately adjust the pre-tightening force, which will affect the data consistency of the internal battery cells in the battery system. sex

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