CN205882094U - Polymer lithium ion battery's spacing removable low head that unloads - Google Patents

Abstract

The utility model discloses a polymer lithium ion battery's spacing removable low head that unloads, including low head main part, limiting gasket plate, stopper and combination screw, the halfpace of a mountable limiting gasket plate, stopper, combination screw is left respectively at both ends about the low head main part, limiting gasket plate and stopper are installed to the order on the halfpace, the through -hole that runs through about stopper central part has, there is the hole groove with stopper main part matched with in the low head main part, the stopper combines the assembly through combination screw and low head main part. Limiting gasket plate or stopper can be changed at any time to the assembly design of low head main part, limiting gasket plate, stopper and combination screw when the long -term use of head causes spacing wearing and tearing, avoid the head directly to reprocess, have reduced the repair cost and the debug time of head, are favorable to putting well application widely into production, have great production practices meaning.

Description

A limit detachable lower head of a polymer lithium ion battery

technical field

The utility model relates to the technical field of batteries, in particular to a position-limiting detachable lower cover of a polymer lithium ion battery.

Background technique

At present, lithium-ion batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also widely used in electric vehicles and electric bicycles. As well as large and medium-sized electric equipment such as electric tools, the safety requirements for lithium-ion batteries are getting higher and higher.

For the polymer lithium-ion battery, it has been widely used in mobile products such as MP3, MP4, personal digital assistants, mobile phones, digital cameras, and toys. It has high voltage, large capacity, long cycle life, no memory effect, and light weight. , wide working range and so on. At present, lithium-ion batteries are increasingly developing in the direction of high-capacity, thin and light.

For the current polymer lithium-ion battery, the existing battery cell assembly method requires the electrode group to be packaged in an aluminum plastic case. When performing top packaging on the leading edge of flexible packaging lithium-ion batteries, the inner layer PP glue of the aluminum-plastic packaging film with a three-layer structure is mainly used for composite packaging with ear glue and a three-layer structure, and the sealing machine is used for composite packaging. It is necessary to meet the tightness of the packaging and ensure that the liquid is not exposed. On the other hand, it is also necessary to ensure that the pressure of the head will not be too high to fracture the battery case, resulting in a short circuit of the battery and causing a safety hazard. At present, the pressing surface of the upper and lower heads of the top seal of the front-end packaging machine for packaging lithium-ion batteries is flat, which often causes the battery to be crushed or the PP glue in the inner layer of the aluminum-plastic packaging film to overflow due to excessive packaging pressure, causing electrolysis. Liquid leaks, which seriously affects the pass rate of the process and the safety performance of lithium-ion batteries. At the same time, the long-term use of the head will lead to deformation of the head, resulting in poor packaging, which increases the cost of equipment debugging and head repair.

Therefore, there is an urgent need to develop a limit detachable lower cap of a polymer lithium-ion battery to overcome the above-mentioned technical deficiencies, to ensure the sealing of the battery, to avoid electrolyte leakage, and to reduce the repair cost of the cap.

Utility model content

The purpose of this utility model is to urgently need to develop a position-limiting detachable lower head of a polymer lithium ion battery to overcome the above-mentioned technical deficiencies, to ensure the sealing of the battery, to avoid electrolyte leakage, and to reduce the repair of the head at the same time The question of cost.

The technical solution adopted to achieve the purpose of this utility model is: a position-limiting detachable lower head of a polymer lithium ion battery, including a lower head body, a spacer spacer, a spacer block and a combined screw. The left and right ends of the main body of the lower head are respectively provided with a platform for installing spacers, spacers and combined screws. The spacers and spacers are installed in sequence on the platform, and the center of the spacer is There are through holes penetrating left and right. The main body of the lower head has a hole that matches the main body of the limiting block. The limiting block is assembled with the main body of the lower head through a combination screw.

The beneficial effect of the above technical solution is that the assembly design of the main body of the lower head, the spacer, the spacer and the combination screw can replace the spacer or the spacer at any time when the spacer wears out due to the long-term use of the head, Avoiding the direct repair of the head, reducing the repair cost and debugging time of the head, is conducive to the wide application in production, and has great practical significance in production.

Wherein, the thickness of the limit gasket on the lower head is consistent with the thickness of the aluminum-plastic packaging film of the battery after the height of the limit block is overlapped with that of the limit plate.

The beneficial effect of the above technical solution is that the limit gasket and the limit block can be adjusted at any time by adjusting the limit gasket and the limit block to adjust the limit height of the head through the assembly structure of the combination screw and the lower head body. Make the thickness of the limit block coincide with the thickness of the aluminum-plastic packaging film of the battery, so that the upper and lower heads can always ensure a certain gap between the two heads when the battery is packaged, avoiding the pressure caused by the packaging pressure. Too large will cause the battery to be crushed or the PP glue in the inner layer of the aluminum-plastic packaging film will overflow, causing the electrolyte to leak, effectively preventing and reducing the generation of defective packaging products, improving the process qualification rate of lithium-ion batteries, and at the same time helping to improve Assembly efficiency of lithium-ion batteries.

Description of drawings

Shown in Fig. 1 is the structural representation of the utility model;

In the figure, the main body of the lower head 1, the limit gaskets 2-1, 2-2, the limit blocks 3-1, 3-2, the combined screws 4-1, 4-2, the steps 5-1, 5- 2.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example

As shown in Figure 1, this embodiment discloses a position-limiting detachable lower head of a polymer lithium-ion battery, including a lower head body 1, spacer spacers 2-1, 2-2, and a spacer block 3 -1, 3-2, combined screws 4-1, 4-2; the limit detachable lower head is assembled and used by these four parts;

The main body 1 of the lower head is an effective part for packaging, and there are respectively a limit gasket 2-1, 2-2, a limit block 3-1, 3-2, and a combination screw 4 at the left and right ends. - 1, 4-2 ladders 5-1, 5-2; said ladders 5-1, 5-2 are sequentially installed with limit gaskets 2-1, 2-2 and limit blocks 3-1, 3-2; the central part of the limit block 3-1, 3-2 has a through hole through the left and right; the limit block 3-1, 3-2 is connected with the lower seal by combining the screws 4-1, 4-2 The head body 1 is combined and assembled; the lower head body 1 has holes matching the through holes of the limit blocks 3-1, 3-2; the limit gaskets 2-1, 2 on the head The thickness of -2 and the height of the limit blocks 3-1 and 3-2 after installation should be designed and debugged according to the principle that the thickness of the limit blocks after overlapping is consistent with the thickness of the battery aluminum-plastic packaging film.

It should be noted that, the utility model is preferably applied to a position-limiting detachable lower cover of a polymer lithium-ion battery.

In a preferred embodiment, the above-mentioned through holes and slots are all set as oblong holes, so as to facilitate the fixing of the limit block after the position is adjusted up and down.

In summary, compared with the prior art, the limit gasket and the limit block described in the utility model can be adjusted at any time by adjusting the limit gasket and the limit block through the assembly structure of the screw and the main body of the lower head. The limit of the head is high or low, so that the thickness of the limit block after overlapping is consistent with the thickness of the battery's aluminum-plastic packaging film, so that the upper and lower heads can always ensure a certain gap between the two heads when packaging the battery. Pores prevent the battery from being crushed due to excessive packaging pressure or the PP glue in the inner layer of the aluminum-plastic packaging film overflows, causing the electrolyte to leak, effectively preventing and reducing the generation of defective packaging products, and improving the process of lithium-ion batteries The pass rate is also conducive to improving the assembly efficiency of lithium-ion batteries. In particular, the assembly design of the main body of the lower head, the limit gasket, the limit block and the combination screw can replace the limit gasket or the limit block at any time when the limit wears out due to the long-term use of the head, so as to avoid the direct repair of the head. The rework cost and debugging time of the head are reduced, which is conducive to wide application in production, and has great practical significance in production.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (2)

1. A position-limiting detachable lower head of a polymer lithium-ion battery, characterized in that it comprises a lower head main body, a spacer spacer, a limit block and a combined screw, and the left and right ends of the lower head main body are respectively There is a ladder on which a limit gasket, a limit block, and a combination screw can be installed. The limit gasket and the limit block are installed in sequence on the ladder, and the center part of the limit block has a through hole through the left and right. There is a hole on the main body of the lower head to match with the main body of the limiting block, and the limiting block is combined with the main body of the lower head through a combination screw. 2. The position-limiting detachable lower head of the polymer lithium-ion battery according to claim 1, characterized in that, the thickness of the spacer on the lower head and the height reference limit after the limit block is installed The thickness of the overlapped positions is consistent with the thickness of the aluminum-plastic packaging film of the battery.