CN202712287U

CN202712287U - Lithium-ion battery sealing device

Info

Publication number: CN202712287U
Application number: CN2012204301112U
Authority: CN
Inventors: 吴军; 殷东; 王健; 向玉枝
Original assignee: JIANGSU LITIAN NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: JIANGSU LITIAN NEW ENERGY TECHNOLOGY Co Ltd
Priority date: 2012-08-28
Filing date: 2012-08-28
Publication date: 2013-01-30
Anticipated expiration: 2022-08-28

Abstract

The utility model discloses a lithium-ion battery sealing device capable of reducing the proportions of seal damage and fluid leakage. The lithium-ion battery sealing device comprises a base, wherein a cover with an inverted approximate U-shaped longitudinal section is arranged above the base, a hermetic cavity is formed between the inner part of the cover and the base when the lower end of the cover is in contact with the upper end surface of the base, a battery fixing tool is arranged on the base at a part in the cavity, a driving device used for driving the cover to move up and down is arranged on the base, an air-outlet pipe and an air-inlet pipe through which the cavity and the outside are communicated are arranged on the cover, and a sealing and nailing air cylinder which corresponds to the battery fixing tool is also arranged on the cover. The lithium-ion battery sealing device has the advantages that tight attachment between positive and negative pole pieces and diaphragms of batteries can be guaranteed when the batteries are sealed under the vacuum state, cycle performance of the batteries under normal temperature is effectively improved, the sealing can be preformed quickly, and at the same time, the proportions of seal damage and fluid leakage due to laying of batteries not in place can be effectively reduced.

Description

The lithium ion battery closing device

Technical field

The utility model relates to a kind of lithium ion battery closing device.

Background technology

Current square aluminum-shell lithium battery liquid injection hole encapsulating method mainly contains two kinds of methods: the one, and make steel ball and liquid injection hole produce interference fit by the extruding steel ball and realize sealing, this kind method shortcoming is to realize that battery puts bad, the leakage of generation battery envelope not in place in vacuum state lower sealing, battery vibrations or position.Another kind is directly to adopt sealing machine, reaches the effect of sealing with laser welding, and the method shortcoming is to realize the vacuum state lower sealing, and electrolyte easily produces leakage to seal location pollution effect welding effect.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of the minimizing to seal lithium ion battery closing device bad, the leakage ratio.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of lithium ion battery closing device, comprise base, the base top is provided with the longitudinal section and is roughly inverted U-shaped lid, when contacting with the base upper surface, the lower end of lid just forms an airtight cavity between the inside of lid and the base, base is arranged on the position of this cavity and is provided with the battery fixing tool, be provided with on the base and drive the drive unit that lid moves up and down, be provided with connection cavity escape pipe and the air inlet pipe outside with it on the lid, also be provided with the envelope nail cylinder corresponding with the battery fixing tool on the lid.

Described drive unit is cylinder.

The beneficial effects of the utility model are: with battery at the vacuum state lower sealing, can guarantee that battery plus-negative plate pole piece, barrier film more fit tightly, and the normal-temperature circulating performance of Effective Raise battery and Quick seal can effectively reduce battery simultaneously and put the bad leakage ratio of the envelope that causes not in place.

Description of drawings

Fig. 1 is the stereogram of the utility model lithium ion battery closing device;

Fig. 2 is the stereogram that Fig. 1 vacuumizes rear sealing.

Among the figure: 1, base, 2, lid, 3, cavity, 4, the battery fixing tool, 5, cylinder, 6, the holder limit, 7, escape pipe, 8, air inlet pipe, 9, envelope nail cylinder, 10, battery.

Embodiment

Below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.

Such as Fig. 1, shown in Figure 2, lithium ion battery closing device described in the utility model, comprise base 1, base 1 top is provided with the longitudinal section and is roughly inverted U-shaped lid 2, when contacting with base 1 upper surface, the lower end of lid 2 just forms an airtight cavity 3 between the inside of lid 2 and the base 1, base 1 is arranged on the position of this cavity 3 and is provided with battery fixing tool 4, be provided with on the base 1 and drive the cylinder 5 that lid 2 moves up and down, be provided with holder limit 6 on the lid 2, the piston rod of cylinder 5 links to each other with holder limit 6, be provided with on the lid 2 and be communicated with cavity 3 escape pipe 7 and the air inlet pipe 8 outside with it, also be provided with the envelope nail cylinder 9 corresponding with battery fixing tool 4 on the lid 2, namely envelope nail cylinder 9 be positioned at battery fixing tool 4 directly over.Wherein cylinder 5 also can be replaced with other drive unit commonly used, moves up and down as long as can drive lid 2.

The course of work of the present utility model is: as shown in Figure 1, first rectangular lithium ion battery 10 is placed in the battery fixing tool 4, then steel ball is placed on sealing part, recycling cylinder 5 drives lid 2 and moves down until lid 2 lower ends and base 1 upper surface close contact---Fig. 2, then utilize compressor from escape pipe 7 cavity 3 to be vacuumized, until cavity 3 interior vacuum reach-0.02～-stop behind the 0.08MPa, the piston rod of envelope nail cylinder 9 is displaced downwardly to the steel ball place, and steel ball headed into makes its sealing in the battery.Encapsulate complete after, by 8 pairs of cavitys of air inlet pipe, 3 interior aerations, behind the air pressure and external balance in cavity 3, utilize cylinder 5 that lid 2 is backed down, just can take off the good lithium ion battery of sealing.Because cavity 3 is when vacuumizing, inside battery also is pumped into negative pressure, this is just so that battery its inside or negative pressure after sealing is complete, thereby can guarantee that battery plus-negative plate pole piece, barrier film more fit tightly, and the normal-temperature circulating performance of Effective Raise battery and Quick seal can effectively reduce battery simultaneously and put the bad leakage ratio of the envelope that causes not in place.

Claims

1. lithium ion battery closing device, it is characterized in that: comprise base, the base top is provided with the longitudinal section and is roughly inverted U-shaped lid, when contacting with the base upper surface, the lower end of lid just forms an airtight cavity between the inside of lid and the base, base is arranged on the position of this cavity and is provided with the battery fixing tool, be provided with on the base and drive the drive unit that lid moves up and down, be provided with connection cavity escape pipe and the air inlet pipe outside with it on the lid, also be provided with the envelope nail cylinder corresponding with the battery fixing tool on the lid.

2. lithium ion battery closing device according to claim 1, it is characterized in that: described drive unit is cylinder.