阅读说明：本技术 一种自极柱端部注液的电池结构及电池注液方法 (Battery structure for injecting liquid from end part of pole and battery liquid injection method ) 是由 陈海峰 于 2021-03-15 设计创作，主要内容包括：本发明涉及一种自极柱端部注液的电池结构,其电池壳体表面仅于其上表面中心位置处设置用于装配电极柱的孔位,该电池结构包括一电极柱,其预留有贯穿于其上下表面的注液孔,此注液孔上端设置锥形端口,通过注液孔由上至下而向电池壳体内部空腔注入电解液,使得电解液直接由注液孔经过电芯的中部空间区域分散引导至电芯表面的各个区域；还包括锥形密封组件,其设置于锥形端口,并且使注液孔封闭。本发明仅利用电极柱来配置注液孔进行注液,并且利用内部电芯中心位置处的空间来提高电池注液操作的流畅性以及确保电芯充分的浸润,且不会影响电池自身结构的稳定性与密封性。(The invention relates to a battery structure for injecting liquid from the end part of a pole, wherein a hole site for assembling an electrode column is arranged only at the central position of the upper surface of the surface of a battery shell, the battery structure comprises the electrode column, a liquid injection hole penetrating through the upper surface and the lower surface of the electrode column is reserved on the surface of the battery shell, a conical port is arranged at the upper end of the liquid injection hole, and electrolyte is injected into a cavity in the battery shell from top to bottom through the liquid injection hole, so that the electrolyte is directly dispersed and guided to each area on the surface of an electric core through the liquid injection hole by passing through; the conical sealing component is arranged at the conical port and enables the liquid injection hole to be closed. The invention only utilizes the electrode column to configure the liquid injection hole for injecting liquid, and utilizes the space at the central position of the internal electric core to improve the smoothness of the liquid injection operation of the battery and ensure the sufficient infiltration of the electric core, and the stability and the sealing performance of the structure of the battery can not be influenced.)

1. The utility model provides a battery structure from end portion of utmost point post notes liquid for keep battery structure's leakproofness and improve the smoothness nature of battery notes liquid operation, the cavity plenum chamber that its battery case is inside to be set up to be used for assembling electric core and splendid attire electrolyte, its characterized in that, battery case surface sets up the hole site that is used for assembling the electrode post only in its upper surface central point department, battery structure includes:

the battery cell is horizontally arranged in the battery shell, and a middle space area is arranged at the center of the battery cell;

the electrode column is provided with a liquid injection hole penetrating through the upper surface and the lower surface, a conical port is arranged at the upper end of the liquid injection hole, and electrolyte is injected into the cavity in the battery shell from top to bottom through the liquid injection hole, so that the electrolyte is directly dispersed and guided to each area on the surface of the battery core from the liquid injection hole through the middle space area of the battery core, and each area is infiltrated;

and the conical sealing assembly is arranged at the conical port and closes the liquid injection hole.

2. The battery structure of the self-terminal end injection according to claim 1, wherein: the battery case is no longer provided with any hole sites, except for the hole sites for assembling the electrode posts.

3. The battery structure of the self-terminal end injection according to claim 2, characterized in that: and the electrolyte after the cell infiltration is dispersed and gushed to the space area of the outer edge of the cell.

4. The battery structure for injecting liquid from the end of a pole according to any one of claims 1 to 3, wherein: the electrode column adopts a molybdenum or copper metal component.

5. The battery structure for injecting liquid from the end of a pole according to any one of claims 1 to 3, wherein: the conical sealing component is made of nickel or aluminum metal components.

6. The battery structure of the self-terminal end injection according to claim 1, wherein: and a metal ring is assembled on the periphery of the electrode column.

7. The battery structure of self-terminal end injection according to claim 6, wherein: the metal ring is tightly attached to the top surface of the battery shell, and an insulating layer is arranged in a gap between the electrode column and the metal ring.

8. The battery structure of self-terminal end injection according to claim 7, wherein: the insulating layer adopts a glass layer.

9. A battery liquid injection method is used for improving the smoothness of battery liquid injection operation and is characterized by comprising the following steps:

selecting a battery to be injected with electrolyte, drilling a vertically-through electrolyte injection hole at the central position of an electrode column of the battery, and aligning a middle space area of a battery core with the electrolyte injection hole when the battery core is assembled in the battery so as to keep the electrolyte injection hole communicated with the middle space area;

II, injecting electrolyte into the battery from the top to the bottom from the arranged electrolyte injection hole, so that the electrolyte is dispersed and guided to each area on the surface of the battery cell through the middle space area, the battery cell is fully soaked, and the smoothness of battery electrolyte injection is improved;

and III, soaking the battery core, and meanwhile, enabling the rest electrolyte to flow to the periphery of the battery core.

10. The battery electrolyte injection method according to claim 9, characterized in that: for step i, the cell may be fixedly mounted on a support on the bottom surface of the battery housing.

Technical Field

The invention relates to the technical field of batteries, in particular to a battery structure for injecting liquid from the end part of a pole and a battery liquid injection method.

Background

The electrolyte injection technology of the battery is generally a process of injecting liquid electrolyte into the battery from an electrolyte injection port, and mainly aims to form an ion channel so as to ensure that enough lithium ions can migrate between a positive plate and a negative plate in the charge and discharge process of the battery and realize reversible cycle.

At present, those skilled in the art know that the common electrolyte injection methods are mainly divided into two types, one is to inject electrolyte directly through an electrolyte injection hole, which is also the most mainstream method, and the other is to put the battery into electrolyte to allow the electrolyte to permeate into the battery; the method of injecting liquid through the liquid injection hole can be divided into single-time injection and multiple-time injection according to the amount of liquid injection, but any method of performing immersion type liquid injection through the liquid injection hole needs to promote the infiltration of the battery core.

After the research and development personnel of the technical scheme of the invention analyze the previous similar battery liquid injection technology, the research and development personnel find that the previous battery liquid injection technology cannot obtain an ideal liquid injection effect due to the influence of factors such as the liquid injection mode, the specific liquid injection position, the sealing means at the liquid injection position, the battery cell infiltration degree and the like, and the specific analysis is as follows:

firstly, most manufacturers inject electrolyte into a battery at present, most of the electrolyte is injected downwards through an opening on the upper surface of the battery or injected upwards through an opening on the lower surface of the battery, so that two hole sites are formed on the upper surface or the lower surface of the battery, one hole site is used for injecting the electrolyte, the other hole site is used for leading out an electrode, and the upper surface of a battery shell needs to be respectively provided with two sets of mutually unrelated sealing structures aiming at the two hole sites, which is extremely unfavorable in terms of processing cost, operation difficulty, structural stability in the application process of the battery and the like, and actually, the self sealing performance of the battery is damaged;

secondly, even if a plurality of manufacturers adopt a mode of directly injecting liquid from the liquid injection hole from the upper part and respectively apply sealing structures for convenient operation, the battery core inside the battery cannot be fully soaked, and even electrolyte waste can be caused;

thirdly, tests at different stages show that if a liquid injection hole is formed in the lower surface of the battery or the upper surface of the battery, corresponding optimization is needed to relieve or solve the problem that electrolyte is easy to flow out;

fourthly, for the processing operation of the battery, the processing operation is often used to be concentrated on one side (namely the upper surface or the lower surface of the battery shell), and if the processing operation can be concentrated on one side of the electrode column and the liquid injection is carried out by utilizing the electrode column, the processing operation is completely beneficial to reducing the application cost of equipment and improving the fluency of the liquid injection operation.

Therefore, the technical means adopted by the current battery liquid injection is not suitable for adopting a liquid injection mode of independently taking out the battery core for liquid injection, but also is not suitable for adopting a mode of randomly configuring liquid injection holes at any positions of the upper surface and the lower surface of the battery for liquid injection.

According to the technical scheme, research personnel reasonably arrange the liquid injection holes on the surface of the battery on the same side of the electrode column to ensure that the battery core is sufficiently infiltrated in the smooth liquid injection process on the premise of not influencing the structural stability of the battery through the feasibility analysis of the plurality of commonly used battery liquid injection modes at present, and the research personnel are urgent to solve the technical problem at present.

In summary, the present invention provides further optimization of the liquid injection technique in the battery technology field by combining with the practical application experience on the basis of the conventional technology, and only utilizes the battery electrode column to configure the liquid injection hole for liquid injection, and improves the smoothness of the liquid injection operation of the battery and ensures the sufficient infiltration of the battery cell by skillfully utilizing the space at the center position of the internal battery cell and matching with the corresponding flow guiding structure, and the stability and the sealing performance of the structure of the battery are not affected. Therefore, the technical scheme provided by the invention can relieve, partially solve or completely solve the problems in the prior art, and meanwhile, the technical scheme provided by the invention also aims to meet the application requirements in the technical field of battery liquid injection.

Disclosure of Invention

In order to overcome the problems or at least partially solve or alleviate the problems, the invention provides a battery structure for injecting liquid from the end part of a pole and a battery liquid injection method designed according to the battery structure, which does not need to additionally form a hole at any position of the surface of a battery shell, only utilizes an electrode pole to configure a liquid injection hole for injecting liquid, skillfully utilizes the space at the central position of an internal battery core and is matched with a corresponding flow guide structure, so that the smoothness of the battery liquid injection operation is improved, the battery core is ensured to be fully soaked, and the stability and the sealing performance of the structure of the battery are not influenced.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a battery structure from end portion of utmost point post notes liquid for keep battery structure's leakproofness and improve the smoothness nature of battery notes liquid operation, its battery case is inside to set up to be used for assembling electric core and the well plenum chamber of splendid attire electrolyte, and battery case surface only sets up the hole site that is used for assembling the electrode post in its upper surface central point department, and this battery structure includes:

the battery cell is horizontally arranged in the battery shell, and the central position of the battery cell is provided with a middle space area;

the electrode column is provided with a liquid injection hole penetrating through the upper surface and the lower surface, a conical port is arranged at the upper end of the liquid injection hole, and electrolyte is injected into the cavity inside the battery shell from top to bottom through the liquid injection hole, so that the electrolyte is directly dispersed and guided to each area on the surface of the battery core from the liquid injection hole through the middle space area of the battery core, and the surface of the battery core is fully soaked;

and the conical sealing component is arranged at the conical port and seals the liquid injection hole.

For the above technical solutions, the skilled person can also adopt appropriate technical means to further supplement or define in combination with the actual application situation, including the following:

the battery case is not provided with any hole sites other than the hole sites for assembling the electrode posts; and the electrolyte after the cell infiltration is dispersed and gushed to the space area of the outer edge of the cell.

Accordingly, the skilled artisan can also select the suitability of the assembly, for example, the electrode shaft can be a molybdenum or copper metal assembly, the conical seal assembly can be a nickel or aluminum metal assembly, and the periphery of the electrode shaft can be fitted with a metal collar.

The metal ring is tightly attached to the top surface of the battery shell, an insulating layer is arranged in a gap between the electrode column and the metal ring, and the insulating layer can be a glass layer.

For the above technical solutions, on the premise of the same concept, those skilled in the art can also implement corresponding technical means to form corresponding technical solutions, including:

a battery liquid injection method is used for improving the smoothness of battery liquid injection operation and comprises the following steps:

selecting a battery to be injected with electrolyte, drilling a vertically-through electrolyte injection hole at the central position of an electrode column of the battery, and aligning a middle space area of a battery core with the electrolyte injection hole when the battery core is assembled in the battery so as to keep the electrolyte injection hole communicated with the middle space area;

II, injecting electrolyte into the battery from the top to the bottom from the arranged electrolyte injection hole, so that the electrolyte is dispersed and guided to each area on the surface of the battery cell through the middle space area, the battery cell is fully soaked, and the smoothness of battery electrolyte injection is improved;

and III, soaking the battery core, and meanwhile, enabling the rest electrolyte to flow to the periphery of the battery core.

In addition, for the implementation of step i, the cell can be fixedly mounted on a support on the bottom of the battery housing.

The battery structure implemented by the invention does not need to additionally form holes at any position of the surface of the battery shell, only utilizes the electrode column to configure the liquid injection hole for injecting liquid, skillfully utilizes the space at the central position of the internal battery core and is matched with the corresponding flow guide structure, thereby improving the smoothness of the liquid injection operation of the battery and ensuring the sufficient infiltration of the battery core without influencing the stability and the sealing property of the structure of the battery.

Drawings

The invention is explained in further detail below with reference to the drawing.

Fig. 1 is a schematic external view of a battery structure impregnated with liquid from the end of a post in accordance with the practice of the present invention;

fig. 2 is a schematic plan view of a battery structure impregnated with liquid from the end of a post in accordance with the practice of the present invention;

FIG. 3 is a schematic sectional view taken along the line A-A of FIG. 2;

fig. 4 is a schematic diagram of a specific internal structure of a battery case in which the self-terminal end injection battery structure according to the present invention can be implemented;

FIG. 5 is an enlarged schematic view of portion 4A of FIG. 4;

FIG. 6 is a schematic view of the cell structure impregnated with liquid from the end of the post, with the internal support of the cell structure;

fig. 7 is a partially exploded view of a self-terminal end-injected battery configuration embodying the present invention.

In the figure:

1. a battery case;

2. an electric core;

3. a metal ring;

4. an insulating layer;

5. an electrode column;

6. a liquid injection hole;

7. a support assembly;

8. a first diversion support;

9. a second diversion support;

10. a mid-space region;

11. a lateral space region;

12. a conical seal assembly.

Detailed Description

The battery structure of the invention is to solve the problem that the smoothness of the battery liquid injection operation and the sufficient infiltration of the battery cell cannot be improved on the basis of ensuring the sealing stability of the battery in the conventional battery liquid injection operation because the battery cell is independently taken out for liquid injection or the liquid injection hole is randomly arranged on the surface of the battery shell for liquid injection.

According to the technical scheme, the electrolyte injection hole from top to bottom is additionally formed in the electrode post, the conical sealing assembly is used as an auxiliary component, and the chamber in the center area of the battery core is used for guiding so that injected electrolyte can uniformly and fully infiltrate the battery core, and meanwhile, the smoothness of the electrolyte injection operation of the battery is improved. However, in addition to these structures, due to the wide range of battery types involved in the technical solution of the present invention, it is inconvenient to limit the specific size, model and material of the components such as the battery case and the electrode column in detail, and a technician can easily implement the liquid injection structure according to the technical means implemented by the present invention for the battery (especially for the metal-packaged battery) to which the liquid injection structure of the present invention can be applied. Therefore, the battery size, the type, the material of the terminal post, the position of the tab, and the like are all conventional technical means in the field, and for the conventional technical means which are not within the technical scope of the present invention, the specific embodiment of the present invention does not need to be detailed in every detail, which is not practical if all the details are listed. Obviously, the technical solution implemented by the present invention is actually a battery structure that enables a person skilled in the art to refer to and implement the liquid injection from the terminal of the terminal by combining with the conventional technical means, and the person skilled in the art can actually apply and test the product formed according to the technical solution of the present invention according to different application conditions and use requirements, so as to actually obtain a series of advantages brought by the product, and the advantages will be gradually reflected in the following analysis of the structure.

Example one

As shown in fig. 1, fig. 2, fig. 3, fig. 5, and fig. 7, the battery structure for injecting liquid from the terminal of the electrode post according to the present invention includes a battery case 1 having a cylindrical structure, the battery case 1 is hollow inside, so as to be used for assembling the battery cell 2 and containing the injected electrolyte, an electrode post 5 with a through hole is disposed at the center of the battery cell 2, an opening is disposed at the top of the battery case 1, so that the electrode post 5 can penetrate through the battery case 1 from bottom to top and extend to the outside of the battery case 1, wherein the opening is also used for installing an annular metal ring 3 capable of sealing and fixing the assembled battery cell 2, the metal ring 3 is tightly attached to the top surface of the battery case 1, and an annular insulating layer 4 is installed in a gap between the electrode post 5 and the metal ring 3, the above-implemented structure forms a base portion of the battery structure, the research and development personnel of the technical scheme in the field further implement corresponding technical means based on the basic part, and the specific steps are as follows:

the reserved through holes of the electrode posts 5 are provided as the liquid injection holes 6, and the liquid injection holes 6 are positioned at the central positions of the electrode posts 5 and penetrate through the upper and lower bottom surfaces of the whole electrode posts 5, so that the liquid injection operation can be performed on the interior of the battery shell 1 from outside to inside through the liquid injection holes 6 without additionally opening any position on the surface of the battery shell 1, and the original sealing performance and structural stability of the battery shell 1 are directly ensured;

correspondingly, because the existing battery cores 2 are all provided with the middle space area 10, the lower part of the liquid injection hole 6 can be directly opposite to the position of the middle space area 10, so that the injected electrolyte is directly dispersed to each area on the surface of the battery core 2 from the liquid injection hole 6 through the middle space area 10 of the internal battery core 2, and the smoothness of the battery liquid injection operation and the sufficient infiltration of the battery core 2 are ensured;

furthermore, the liquid injection hole 6 left in the electrode column 5 can be designed into a conical structure according to the corresponding sealing design requirements, that is, the hole wall of the upper end part of the liquid injection hole 6 has a certain taper, and the hole diameters are gradually decreased from top to bottom, meanwhile, a corresponding conical sealing component 12 is additionally configured according to the shape of the hole wall of the end part, electrolyte can be injected into the cavity inside the battery shell 1 from top to bottom through the liquid injection hole 6 in the state that the conical sealing component 12 is taken out, and due to the existence of the taper, compared with the hole positions with consistent hole diameters and no taper in the prior art, the liquid outflow inside the battery shell 1 is favorably relieved or avoided in the state that the conical sealing component 12 is closed; in addition, the electrode column 5 is drilled with the liquid injection hole 6, which is also beneficial to directly leading out the conductor.

For each component to be implemented, the skilled person can make different choices according to different design requirements, for example, the electrode column 5 can be made of a metal component such as molybdenum or copper, the tapered sealing component 12 can be made of a metal component such as nickel or aluminum, and the insulating layer 4 can be made of a glass layer, but of course, other possible components are not described herein.

In the battery structure for injecting liquid from the end of the terminal, in order to ensure the stability of the liquid injection state of the battery, a corresponding flow guiding structure (or bottom support) may be further disposed at the bottom of the battery cell 2, so as to promote the electrolyte to be smoothly guided and dispersed to other areas through the middle space region 10 of the battery cell 2 after entering from the liquid injection hole.

Example two

As shown in fig. 4 and 6, the battery structure for injecting liquid from the end of the terminal according to the second embodiment of the present invention is a supplement and a perfection of the technical means implemented in the first embodiment, and on the premise of being beneficial to improving the smoothness of the battery liquid injection operation, a technician may further implement corresponding technical means to form a corresponding technical scheme, which specifically includes:

technical staff can add an annular supporting component 7 in 1 inner chamber bottom surface level of battery case, of course, can select the subassembly that does not have the influence to electric core 2 performance to the concrete material of supporting component 7, furthermore, 7 tops of the supporting component of implementing set up two-layer water conservancy diversion support, and be water conservancy diversion support one 8 from inside to outside in proper order, water conservancy diversion support two 9, the cross section of each water conservancy diversion support is the loop configuration, so that after putting into electric core 2, can make 2 levels of electric core be fixed in the top of two water conservancy diversion supports and be located in the surrounding of water conservancy diversion support two 9.

This embodiment two-way through the setting of above technical means, when annotating liquid, electrolyte is poured into from top to bottom by notes liquid hole 6 that electrode post 5 was reserved, earlier through the middle part spatial zone 10 of electric core 2 and guide to each region on electric core 2 surface, can let each region on electric core 2 surface fully soak gradually, then, make the electrolyte dispersion after electric core soaks again gush to electric core 2 periphery, and the lateral part spatial zone 11 position department between electric core 2 outward flange and the water conservancy diversion support two 9, it is visible, through addding two water conservancy diversion supports, can also play basic drainage effect, in addition, also can improve the degree of consistency that electric core 2 surface electrolyte soaks. Compared with the prior mode that the electrolyte is randomly and directly injected into the inner space of the shell through the injection hole, the technical means implemented by the invention can fully soak the surface of the electric core 2 while injecting the electrolyte.

Of course, when the electrolyte is injected, most of the electrolyte passes through the middle space region 10 of the battery cell 2, and a part of the electrolyte directly infiltrates the surface of other regions of the battery cell 2, but this does not affect the full infiltration of the whole battery cell 2.

Accordingly, as the selection criteria of the support component 7 are the same, for the selection of the flow guide support, the skilled person may adopt components that do not affect the application performance of the electric core 2, do not generate chemical reaction, and do not generate corrosion, and the selection of these components is a routine choice that can be performed by the skilled person according to the technical common knowledge thereof, and will not be described herein again.

EXAMPLE III

As shown in fig. 1 to 5, a battery electrolyte injection method implemented in the third embodiment of the present invention is complementary and perfected to the technical means implemented in the first embodiment or the second embodiment, and on the premise of ensuring that the sealing performance of the battery itself is not damaged and the smoothness of the battery electrolyte injection operation is improved, a technician may further implement corresponding technical means according to the battery structure to form corresponding method steps, which specifically include:

firstly, selecting a battery to be injected with electrolyte, drilling a vertically-through electrolyte injection hole 6 at the central position of an electrode column 5 of the battery, and aligning a middle space area 10 of a battery core 2 with the electrolyte injection hole 6 when the battery core 2 is assembled in the battery so that the electrolyte injection hole 6 is communicated with the middle space area 10;

secondly, electrolyte is injected into the battery from the top to the bottom through the electrolyte injection hole 6, so that the electrolyte is dispersed and guided to each area on the surface of the battery core 2 through the middle space area 10, the battery core 2 is fully soaked, and the smoothness of battery electrolyte injection is improved;

and thirdly, when the battery core 2 is soaked, the rest electrolyte is flushed to the periphery of the battery core 2.

In addition, the advantage of the battery electrolyte injection method can be further improved by combining the technical means of the flow guide support adopted in the second embodiment, and specific methods refer to the corresponding technical means of the second embodiment and are not repeated herein.

In the description herein, the appearances of the phrases "embodiment one," "this embodiment," "specific implementation," and the like in this specification are not necessarily all referring to the same embodiment or example, but rather to the same embodiment or example. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example; furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present specification, the terms "connect", "mount", "fix", "set", "have", and the like are used in a broad sense, for example, the "connect" may be a fixed connection or an indirect connection through intermediate components without affecting the relationship and technical effects of the components, or may be an integral connection or a partial connection, as in this case, for a person skilled in the art, the specific meaning of the above terms in the present invention can be understood according to specific situations.

The foregoing description of the embodiments is provided to enable any person skilled in the art to make and use the embodiments, and it is to be understood that various modifications may be readily apparent to those skilled in the art, and that the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present disclosure is not limited to the above embodiments, and modifications to the following cases should be included within the scope of the present disclosure: firstly, a new technical scheme is implemented on the basis of the technical scheme and in combination with the prior common general knowledge, the technical effect of the new technical scheme is not beyond the technical effect of the invention, for example, a liquid injection hole is additionally arranged at the center of an electrode column and electrolyte is guided through the middle area of a battery core, the formed technical scheme is used for various technical means of battery liquid injection, and the generated expected effect is not beyond the technical effect of the invention; secondly, equivalent replacement of part of the characteristics of the technical scheme of the invention by adopting the known technology produces the same technical effect as the invention, for example, equivalent replacement is carried out on the size of a battery shell or an electrode column, the model of a battery cell and the like; expanding on the basis of the technical scheme of the invention, wherein the substantial content of the expanded technical scheme does not exceed the technical scheme of the invention; and fourthly, the technical means obtained by utilizing the equivalent transformation carried out by the text record content of the invention is applied to other related technical fields.