CN202905901U

CN202905901U - Sealing plug assembly for lithium ion battery formation process

Info

Publication number: CN202905901U
Application number: CN2012205522822U
Authority: CN
Inventors: 于新生; 杨桦; 桂永泉
Original assignee: HEFEI HENGNENG NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: CNSG ANHUI HONG SIFANG LITHIUM CO., LTD.
Priority date: 2012-10-26
Filing date: 2012-10-26
Publication date: 2013-04-24
Anticipated expiration: 2022-10-26

Abstract

The utility model belongs to the field of lithium ion battery production, and concretely relates to a sealing plug assembly for a lithium ion battery formation process. The sealing plug assembly disclosed by the utility model is of a one-way valve structure, and the air inlet end of the sealing plug assembly is fixedly connected and matched with an electrolyte injection port on a battery box. The sealing plug assembly disclosed by the utility model has the advantages of simpler structure and simplicity and convenience in operation, and avoids the reverse air intake problem possibly caused by traditional sealing plugs, therefore, the sealing plug assembly not only can effectively improve the formation quality of lithium ion batteries, but also facilitates the further improvement of the production efficiency.

Description

A kind of sealing plug assembly for the lithium ion battery chemical synthesis technology

Technical field

The utility model belongs to lithium ion battery and makes the field, is specifically related to a kind of sealing plug assembly that uses for lithium ion battery chemical synthesis technology processing procedure.

Background technology

Lithium ion battery is the novel high-energy battery of succeeding in developing in 20th century, and it is subject to the favor of every profession and trade owing to factors such as specific energy are high, and volume is little, and is non-maintaining, environmental protection.Along with the progress of technology and the development of New Energy Industry, high capacity lithium ion battery has been widely used in each most advanced and sophisticated industries such as photovoltaic cell industry, ups power, electric automobile.

Changing into is very important operation in the lithium ion battery manufacturing process, specifically being the battery of encapsulation being finished with little electric current charges active with active material, material and electrolyte are fully merged, positive reaction and back reaction reach a balance point, thereby guarantee that the follow-up use of battery is that to discharge and recharge be a stable cyclic process.Because when changing into; can be because of the rising of charging voltage in the process of battery initial charge; thereby the electrochemical reducting reaction of electrolyte occurs under certain current potential; and generation gas; form the solid-electrolyte interphace film on the negative material surface simultaneously; (Solid electrolyte interphase) is the SEI film of protectiveness, and this moment is just most important to the in good time discharge that it produces gas.Present solution is: after the battery core mounted box, the arranged at safety valve on battery case installs sealing plug additional, opens the sealing plug fluid injection when annotating electrolyte; And after the fluid injection, then install sealing plug additional.Its concrete structure is shown in Fig. 1-2, specifically comprise for and the electrolyte filler on battery case top between be the bolted joint of threaded engagement, bolted joint is pipe-like and the vessel of the injecting oil liquid that is arranged in battery side to be changed that submerge of postponing, thereby reaches duct type exhaust purpose; Like this, it not only has simultaneously will change into the smoothly discharge effect of pernicious gas that produces when wearing out smoothly, can effectively avoid again battery core external water molecule and other materials to the infiltration of battery core inside, guarantee the space safety in the battery.After changing into end, under the environment of dew point-45 degree, again sealing plug is replaced by safety valve, to reach the final sealing purpose of dispatching from the factory.The major defect of said structure is: on the one hand, the thread seal mode of bolted joint often can't satisfy the fast insert-pull needs, thereby has inevitably incured loss through delay operating efficiency; Secondly, said structure must rely on the vessel of the injecting oil liquid that is positioned at battery side to be changed to reach just now duct type one-way sealing effect, not only complex structure and volume are larger, simultaneously, must guarantee that again the end that bolted joint is positioned at vessel is positioned at below the fluid liquid level of vessel all the time, use extremely inconvenience, cause in case deviation appears in operation that extraneous gas is counter fills with, bring very big impact namely for the end product quality of lithium ion battery, thereby often bring very big puzzlement to the staff.

Summary of the invention

The purpose of this utility model provides a kind of sealing plug assembly that is used for the lithium ion battery chemical synthesis technology of simple in structure and simple operation, and it can the one-way ventilating purpose when the present lithium ion battery of to satisfy effectively changes into further promote its operating efficiency simultaneously.

For achieving the above object, the utility model has adopted following technical scheme: a kind of sealing plug assembly for the lithium ion battery chemical synthesis technology, described sealing plug assembly is one-way valve structures, affixed being equipped with between the inlet end of described sealing plug assembly and the electrolyte inlet on the battery case.

The beneficial effects of the utility model are: after adopting said structure, rely on the one-way conduction of unidirectional valve itself and the unique texture that oppositely ends, guarantee again the space safety of inside battery in the exhaust smoothly on the one hand, thereby realizing the function that traditional structure is achieved; On the other hand, on aforementioned basis, the utility model structure is obviously more simple, its be difficult to operate and take up an area excessive traditional exhaust structure, be all can not be same from volume or from degree easy and simple to handle and speak.The utlity model has structure advantage more simple and simple to operation, the reverse air inlet problem of simultaneously having avoided again the conventional seals plug to cause, not only but the Effective Raise lithium ion battery changes into quality, also is conducive to further improve simultaneously its production efficiency.

Description of drawings

Fig. 1-2 is the working state structure schematic diagram of conventional seals plug;

Fig. 3-4 is the structural representation of wherein a kind of embodiment of the present utility model;

Fig. 5 is the structural representation of another kind of embodiment of the present utility model;

Fig. 6 is Fig. 3 and working state figure embodiment illustrated in fig. 4;

Fig. 7 is the structural representation of unidirectional valve unit.

Embodiment

A kind of sealing plug assembly for the lithium ion battery chemical synthesis technology, described sealing plug assembly is one-way valve structures, affixed being equipped with between the electrolyte inlet on the inlet end of described sealing plug assembly and the battery case a is actual shown in Fig. 3-7.

The utility model is by banning the fit system of traditional blast pipe and oiling vessel, and adopts the special sealing plug assembly with non-return valve function, thereby realizes its single-way exhaust function.On the one hand, it is guaranteeing again the space safety of inside battery in exhaust smoothly, thereby has realized the function that traditional structure is achieved; On the other hand, on aforementioned basis, the utility model structure is obviously more simple, during use or adopt separately directly unidirectional valve and with affixed being equipped with between the electrolyte inlet on its P end also inlet end and the battery case a, again or adopt all the other attachment components to realize greater functionality and effect, its be difficult to operate and take up an area excessive traditional exhaust structure, be all can not be same from volume or from degree easy and simple to handle and speak.The utlity model has structure advantage more simple and simple to operation, the reverse air inlet problem of simultaneously having avoided again the conventional seals plug to cause, not only but the Effective Raise lithium ion battery changes into quality, also is conducive to further improve simultaneously its production efficiency.

As further preferred version, such scheme of the present utility model can be derived and is following embodiment: such as Fig. 3-4 and shown in Figure 6, described sealing plug assembly comprises unidirectional valve unit 10 and cannula-like pipe joint 20, and an end of described pipe joint 20 forms the abutting end that matches with battery case By Electrolysis liquid inlet; Described sealing plug assembly also comprises transparence conduit 30, and the inlet end that described conduit 30 is positioned at unidirectional valve unit 10 is with 20 of pipe joints and be communicated with both and arrange.In fact, the utility model relies on unidirectional valve unit 10 itself can realize its single-way exhaust function, unidirectional valve unit 10 can be preferably spring non-return valve as shown in Figure 7 during actual the use, its unidirectional opening pressure can correspondingly be elected as: 0.105～0.11Mpa is as the criterion with the actual required opening pressure that can satisfy the user.Transparence conduit 30 by extra layout, thereby make the staff in the situation of advancing of carrying out to observe intuitively with naked eyes when battery changes into the conduit 30 interior electrolyte that may occur or bubble that emergent gas is formed etc., to make things convenient for the staff in time and accurately to grasp whole battery formation process, finally give security for the quality of finished of battery after changing into.

Certainly, for further guaranteeing the detachability of sealing plug assembly, even use to guarantee after the reasons such as part component corrosion or high temperature are impaired, can again change, the end profile that is communicated with conduit 30 on the described unidirectional valve of the present utility model unit 10 is frustum, forming the elastic expanding compact form between the hole wall of its frustum outer wall and conduit 30 pegs graft and cooperates grafting setting between the other end outer wall of conduit 30 and the respective ends hole wall of pipe joint 20.That is to say, as shown in Figure 3-4, the utility model is by the detachable split design of 30 in above-mentioned unidirectional valve unit 10, pipe joint 20 and conduit, thereby for the formation of its final interchangeable structure of modularization provides possibility, repeat to use final its use and the cost of manufacture of further reducing thereby be more convenient for it.

Reference scheme as above-described embodiment, consider in some cases, for reducing use volume of the present utility model, as shown in Figure 5: described sealing plug assembly comprises unidirectional valve unit 10 and cannula-like pipe joint 20, one end of described pipe joint 20 consists of the abutting end that matches with battery case By Electrolysis liquid inlet, and the other end of described pipe joint 20 is communicated with the inlet end of unidirectional valve unit 10 and affixed setting; Connection with pipe joint 20 end profile on the described unidirectional valve unit 10 is frustum, forms the grafting of elastic expanding compact form between the hole wall of its frustum outer wall and pipe joint 20 and cooperates.In other words, the utility model has been cancelled the structure of conduit 30 on the basis of previous embodiment, thereby has further reduced actual use volume of the present utility model, thereby is more convenient for carrying and using.

Material as for above-mentioned each parts is selected, and the elastomeric material of pipe joint 20 preferred acid-resistant and heat-resistants processes, as is polyurethane elastomer material, silicon rubber, nitrile rubber or ethylene propylene diene rubber etc.; Conduit 30 is the corresponding polythene PE material of selecting then, or is the fine PAN of polypropylene, nylon PA, polypropylene PP, polyvinylchloride, engineering resin ABS macromolecular material etc.; As for active unidirectional valve unit 10, actual use is optional to be processed by macromolecular materials such as polythene PEs.Certainly, according to producer and user's processing and demand, its material can not be unalterable, specifically is as the criterion to satisfy its actual demand, just gives unnecessary details no longer one by one herein.

Further, for specific implementation cannula-like pipe joint 20 and and battery case a By Electrolysis liquid inlet between actual matching relationship: shown in Fig. 3-6, described pipe joint 20 is frustum for elastomer and the abutting end profile with battery case a By Electrolysis liquid inlet on it, forming the elastic expanding compact form between the electrolyte inlet hole wall on its frustum outer wall and the battery case pegs graft and cooperates, thereby rely on its direct insertion or perhaps easy-to-pull type structure, further improve its actual operating efficiency.

Claims

1. sealing plug assembly that is used for the lithium ion battery chemical synthesis technology, it is characterized in that: described sealing plug assembly is one-way valve structures, affixed being equipped with between the inlet end of described sealing plug assembly and the electrolyte inlet on the battery case.

2. sealing plug assembly according to claim 1, it is characterized in that: described sealing plug assembly comprises unidirectional valve unit (10) and cannula-like pipe joint (20), one end of described pipe joint (20) consists of the abutting end that matches with battery case By Electrolysis liquid inlet, and the other end of described pipe joint (20) is communicated with the inlet end of unidirectional valve unit (10) and affixed setting.

3. sealing plug assembly according to claim 2 is characterized in that: connection with pipe joint (20) the end profile on the described unidirectional valve unit (10) is frustum, forms the grafting of elastic expanding compact form between the hole wall of its frustum outer wall and pipe joint (20) and cooperates.

4. sealing plug assembly according to claim 1, it is characterized in that: described sealing plug assembly comprises unidirectional valve unit (10) and cannula-like pipe joint (20), and an end of described pipe joint (20) forms the abutting end that matches with battery case By Electrolysis liquid inlet; Described sealing plug assembly also comprises transparence conduit (30), between the inlet end that described conduit (30) is positioned at unidirectional valve unit (10) and pipe joint (20) and be communicated with both and arrange.

5. sealing plug assembly according to claim 4, it is characterized in that: the end profile that is communicated with conduit (30) on the described unidirectional valve unit (10) is frustum, forming the elastic expanding compact form between the hole wall of its frustum outer wall and conduit (30) pegs graft and cooperates grafting setting between the respective ends hole wall of the other end outer wall of conduit (30) and pipe joint (20).

6. according to claim 2 or 3 or 4 or 5 described sealing plug assemblies, it is characterized in that: described pipe joint (20) is for elastomer and the abutting end profile with battery case By Electrolysis liquid inlet on it are frustum, forms the elastic expanding compact form between the electrolyte inlet hole wall on its frustum outer wall and the battery case and pegs graft and cooperate.

7. according to claim 1 and 2 or 3 or 4 or 5 described sealing plug assemblies, it is characterized in that: described unidirectional valve unit (10) is spring non-return valve, and its unidirectional opening pressure is: 0.105～0.11MPa.