阅读说明：本技术 一种自底部注液的电池结构及电池注液方法 (Battery structure with liquid injection from bottom and battery liquid injection method ) 是由 陈海峰 于 2021-03-15 设计创作，主要内容包括：本发明涉及一种自底部注液的电池结构,其电芯水平设置于电池壳体底面或电池壳体的底面支座上,并且使电芯的中部空间区域对准电池壳体底面中心位置；电池的注液孔位设置于电池壳体底面中心位置处,并且通过注液孔位由下至上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位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。本发明所实施之电池结构采用由电池底部配置注液孔进行注液的方式,其通过巧妙地利用内部电芯中心位置处的空间并配合相应的导流结构,在不影响电池自身结构稳定性的前提下,既能够提高电池注液操作的流畅性,又可确保电芯充分的浸润。(The invention relates to a battery structure for injecting liquid from the bottom, wherein a battery core is horizontally arranged on the bottom surface of a battery shell or a bottom surface support of the battery shell, and the middle space region of the battery core is aligned to the central position of the bottom surface of the battery shell; the liquid injection hole site of battery sets up in battery case bottom surface central point department to pour into electrolyte into to battery case inside cavity through annotating the liquid hole site from bottom to top, make electrolyte direct by annotate the regional dispersion of liquid hole site through the middle part space of electric core and guide to each region on electric core surface. The battery structure implemented by the invention adopts a mode of filling liquid by arranging the liquid filling hole at the bottom of the battery, skillfully utilizes the space at the central position of the internal battery core and is matched with the corresponding flow guide structure, so that the smoothness of the liquid filling operation of the battery can be improved and the full infiltration of the battery core can be ensured on the premise of not influencing the structural stability of the battery.)

1. The utility model provides a battery structure of annotating liquid from bottom for 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 structure includes:

the battery cell is horizontally arranged on the bottom surface of the battery shell or the bottom surface support of the battery shell, and the middle space region of the battery cell is aligned to the center position of the bottom surface of the battery shell;

and the electrolyte injection hole site is arranged at the center of the bottom surface of the battery shell, and electrolyte is injected into the cavity inside the battery shell from bottom to top through the electrolyte injection hole site, so that the electrolyte is directly guided to each area on the surface of the battery core from the electrolyte injection hole site through the middle space area of the battery core in a dispersed manner, and the surface of the battery core is fully soaked.

2. The bottom-injection battery structure of claim 1, wherein: the bottom surface support comprises a first diversion support and a second diversion support which are arranged above the bottom surface of the battery shell from inside to outside in sequence, and the battery cell is horizontally fixed above the two diversion supports, so that the liquid injection hole position is communicated with the middle space region of the battery cell.

3. The bottom-injection battery structure of claim 2, wherein: and dispersing and pouring the electrolyte soaked by the battery core to a lateral space area between the outer edge of the battery core and the second diversion support.

4. The bottom-injection battery structure of claim 1, wherein: and an annular supporting component is horizontally arranged on the bottom surface of the battery shell at the periphery of the liquid injection hole position.

5. The bottom-injection battery structure of claim 1, wherein: and the liquid injection hole position is provided with a corresponding hole plug.

6. The bottom-injection battery structure of any of claims 1-5, wherein: and a molybdenum rod pole is arranged at the center of the battery core and penetrates through the battery shell from bottom to top to extend to the outside of the battery shell.

7. The bottom-injection battery structure of claim 6, wherein: and a steel ring is assembled on the periphery of the molybdenum rod pole.

8. The bottom-injection battery structure of claim 7, wherein: the steel ring is tightly attached to the top surface of the battery shell, and a glass layer is arranged in a gap between the molybdenum rod pole and the steel ring.

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, arranging a liquid injection hole at the center of the bottom surface of a shell of the battery, and aligning the middle space region of a battery core with the liquid injection hole when the battery core is assembled in the battery so as to ensure that the liquid injection hole is communicated with the middle space region;

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

III, soaking the battery core, and meanwhile, enabling the 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 can be fixedly assembled on the flow guide support on the bottom surface of the battery shell.

Technical Field

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

Background

For the battery electrolyte injection technology, the process of injecting the liquid electrolyte into the battery from the electrolyte injection port is generally based on controlling the amount and injection time of the liquid electrolyte, and the main purpose is to form an ion channel, so that enough lithium ions can be transferred between the positive plate and the negative plate in the charging and discharging process of the battery, and reversible circulation is realized.

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 former adopts a liquid injection hole to inject liquid, and can be divided into single-time liquid injection and multiple-time liquid injection (different according to different battery structures and batches) according to the liquid injection amount, and the measures of promoting the infiltration of several liquid injection modes are different, wherein the single-time liquid injection method promotes the infiltration of the electrolyte in the battery core by repeatedly pumping and pressing, while the multiple-time liquid injection method promotes the infiltration of the electrolyte in the battery core by pressurizing, and the immersion liquid injection does not have the measure of promoting the infiltration.

After analyzing the similar battery liquid injection technology, research and development personnel of the technical scheme of the invention find that the conventional battery liquid injection technology cannot obtain an ideal liquid injection effect due to the influence of factors such as a liquid injection mode, a liquid injection position, a battery self structure, a sealing means, a battery cell infiltration degree and the like, and specifically analyze as follows:

firstly, taking a lithium battery as an example, the lithium battery is widely applied to products such as mobile phones, notebook computers, digital cameras, electric vehicles, electric tools, new energy automobiles and the like, most manufacturers inject electrolyte into the battery at present by opening a hole on the upper surface of the battery and injecting the electrolyte downwards, and the process is completed through the following steps: the electrolyte injection device has the advantages that the electrolyte injection device is vacuumized, injected with fixed amount, pressurized and discharged with batteries, the electrolyte injection mode is a sleeve type electrolyte injection mode, the fixed amount of electrolyte injection is adopted, the liquid injection amount of each time of electrolyte injection is the same, the injection times are increased, the electrolyte injection hole is directly injected with the electrolyte, the inside battery core cannot be fully soaked, the electrolyte waste can be caused, the production cost is increased, and in addition, certain corrosion can be caused to the electrolyte injection device if an accident happens.

Secondly, for a plurality of metal-packaged battery structures, molybdenum rods are usually arranged on the upper surfaces of the metal-packaged battery structures and provided with steel rings and the like, the molybdenum rods have high melting points, good thermal conductivity and low thermal expansion performance and are commonly used for manufacturing electrodes, if liquid injection holes are additionally arranged around the molybdenum rods, the steel rings or a sealing structure arranged on the upper surface, obviously, the smoothness of liquid injection of the battery is influenced, certain damage is caused to the stability of the structure of the battery, the service life and the application performance of the battery are difficult to ensure, and the defect that the liquid injection holes are commonly arranged on the upper surface at present is overcome.

Third, as known from the above analysis, if a liquid injection manner is adopted, in which a battery cell is taken out and placed in an electrolyte, and then the electrolyte is allowed to permeate into the battery, the liquid injection manner is also a common liquid injection manner in the field, but the liquid injection manner belongs to a manner of taking out the battery cell and independently operating the battery cell, obviously, the liquid injection efficiency, the labor hour cost, the strictness of the battery structure and other aspects have obvious disadvantages, and the continuity and the smoothness of the battery liquid injection operation are not facilitated.

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 liquid injection mode of injecting liquid downwards through the liquid injection hole arranged on the upper surface.

Through the demonstration of different technical means, research and development personnel determine that corresponding technical means are required to be arranged on the premise of reasonably designing the self structure of the battery.

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 adopts the liquid injection hole configured at the bottom of the battery to inject the liquid, 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, without affecting the stability of the structure of the battery. 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 bottom and a battery liquid injection method designed according to the battery structure.

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

the utility model provides a battery structure of annotating liquid from bottom for improve the smoothness nature of battery notes liquid operation, its battery case is inside to be set up to be used for assembling electric core and the well plenum chamber of splendid attire electrolyte, and this battery structure includes:

the battery cell is horizontally arranged on the bottom surface of the battery shell or the bottom surface support of the battery shell, and the middle space area of the battery cell is aligned to the center position of the bottom surface of the battery shell;

and the electrolyte injection hole site is arranged at the center of the bottom surface of the battery shell, and the electrolyte is injected into the cavity inside the battery shell from bottom to top through the electrolyte injection hole site, so that the electrolyte is directly guided to each area on the surface of the battery core through the dispersion of the electrolyte injection hole site through the middle space area of the battery core, and the surface of the battery core is fully soaked.

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 bottom surface support comprises a first diversion support and a second diversion support which are arranged above the bottom surface of the battery shell from inside to outside in sequence, and the battery cell is horizontally fixed above the two diversion supports, so that the liquid injection hole position is communicated with the middle space region of the battery cell.

By implementing the structure, the electrolyte after the cell is soaked is dispersed and gushes to the lateral space area between the outer edge of the cell and the second diversion support.

In addition, an annular supporting component can be horizontally arranged on the bottom surface of the battery shell at the periphery of the liquid injection hole position.

Accordingly, the technician may also configure the injection hole site with a corresponding plug.

Furthermore, for the battery structure, a molybdenum rod pole can be selectively configured at the center of the battery core, and the molybdenum rod pole penetrates through the battery shell from bottom to top and extends to the outside of the battery shell;

the periphery of the molybdenum rod pole is provided with a steel ring which is tightly attached to the top surface of the battery shell, and a glass layer is arranged in a gap between the molybdenum rod pole and the steel ring.

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, arranging a liquid injection hole at the center of the bottom surface of a shell of the battery, and aligning the middle space region of a battery core with the liquid injection hole when the battery core is assembled in the battery so as to ensure that the liquid injection hole is communicated with the middle space region;

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

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

In addition, for the implementation of step i, the cell may be fixedly mounted on a flow guide support on the bottom surface of the battery case.

The battery structure implemented by the invention adopts a mode of filling liquid by configuring the liquid filling hole at the bottom of the battery, skillfully utilizes the space at the central position of the internal battery core and is matched with the corresponding flow guide structure, not only can improve the smoothness of the liquid filling operation of the battery, but also can ensure the sufficient infiltration of the battery core on the premise of not influencing the structural stability of the battery, and can embody obvious superiority compared with the traditional mode of independently taking out the liquid filling of the battery core or the mode of filling the liquid from the upper surface of the battery downwards.

Drawings

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

FIG. 1 is a schematic external view of a bottom-injection battery configuration in which the present invention is practiced;

FIG. 2 is a schematic top view of a bottom-filled battery configuration embodying 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 bottom-filled battery structure in which the present invention is implemented, and the internal structure of a specific battery case in which the present invention can be implemented;

fig. 5 is a schematic diagram of the cell position of a bottom-injected battery configuration in which the present invention is implemented;

fig. 6 is a partially exploded view of a bottom-injected battery according to a second embodiment of the present invention.

In the figure:

1. a battery case;

2. an electric core;

3. steel rings;

4. a glass layer;

5. a molybdenum rod pole;

6. liquid injection hole sites;

7. a support assembly;

8. a first diversion support;

9. a second diversion support;

10. a mid-space region;

11. a lateral space region.

Detailed Description

The battery structure of the invention is to be implemented by injecting liquid from the bottom, and the technical means implemented by the invention aims to solve the problem that the smoothness of battery liquid injection operation and sufficient infiltration of a battery cell cannot be improved on the basis of ensuring the application stability of the battery due to the adoption of a mode of independently taking out a battery cell liquid injection liquid or a mode of arranging a liquid injection hole on the upper surface to inject liquid downwards in the conventional battery liquid injection.

According to the technical scheme, the bottom of the battery shell is additionally provided with the liquid injection structure from bottom to top, and the cavity in the center area of the battery core is used for guiding so that the injected electrolyte can uniformly and fully infiltrate the battery core, so that the smoothness of the liquid 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 battery case in detail, and a technician can easily implement the technical solution according to the invention for the battery (especially for the metal-packaged battery) to which the electrolyte 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 injected with liquid from the bottom, which can be referred and implemented by a person skilled in the art by combining with 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, and fig. 6, the battery structure filled with liquid from the bottom according to the present invention includes a battery case 1 having a cylindrical structure, the interior of the battery case 1 is hollow so as to be used for assembling a battery cell 2 and containing the injected electrolyte, a molybdenum rod terminal 5 is disposed at the center of the battery cell 2, the top of the battery case 1 is provided with an opening, so that the molybdenum rod terminal 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 steel ring 3 capable of sealing and fixing the assembled battery cell 2, the steel ring 3 is tightly attached to the top of the battery case 1, and an annular glass layer 4 is installed in a gap between the molybdenum rod terminal 5 and the steel ring 3, the above-implemented structure forms a basic portion of the battery structure, and developers of the present invention further implement corresponding technical means based on the basic portion, the method comprises the following specific steps:

the central position of the bottom of the battery shell 1 implemented above is additionally provided with the liquid injection hole site 6, and corresponding hole plugs can be additionally configured according to different design requirements, under the state that the hole plugs are taken out, electrolyte can be injected into the cavity inside the battery shell 1 from bottom to top through the liquid injection hole site 6, and as the lower part of the middle space region 10 of the inner battery core 2 is right opposite to the position of the liquid injection hole site 6, for the injected electrolyte, the injected electrolyte can be directly dispersed to each region on the surface of the battery core 2 through the middle space region 10 of the inner battery core 2 by the liquid injection hole site 6, so that the smoothness of the liquid injection operation of the battery and the sufficient infiltration of the battery core 2 are ensured.

In the battery structure with liquid injection from the bottom according to the present invention, in order to ensure the stability of the liquid injection state of the battery, a corresponding supporting component may be further disposed at the bottom of the battery cell 2, so as to facilitate the electrolyte entering from the liquid injection hole to be smoothly guided and dispersed to other areas via the middle space region 10 of the battery cell 2.

Example two

As shown in fig. 4-5, the battery structure with liquid injection from the bottom implemented in 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 can further implement corresponding technical means to form a corresponding technical scheme, which specifically includes:

add an annular supporting component 7 around the level of implementing 1 inner chamber bottom surface of annotating liquid hole site 6 outlying 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, supporting component 7 top of implementing sets 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, wherein, the position is in the water conservancy diversion support one 8 bottoms of inlayer and fixes the casing inner wall surface above annotating liquid hole site 6, the position is in outer water conservancy diversion support two 9 bottoms and then is fixed in supporting component 7, thereby make electric core 2 can the level be fixed in the top of two water conservancy diversion supports, and ensure that annotate liquid hole site 6 and the middle part space region 10.

This embodiment is through the setting of above technical means, when annotating the liquid, electrolyte is by annotating liquid hole site 6 of battery case 1 bottom surface from lower supreme injection into, pass guide support 8 central point earlier and put, through the middle part space region 10 of electric core 2 and guide to each region on electric core 2 surface again, can let each region on electric core 2 surface fully soak earlier, then, make the electrolyte dispersion after electric core soaks again gush to electric core 2 periphery, and the lateral part space region 11 position department between electric core 2 outward flange and guide support two 9, it is thus clear that, through addding two guide supports, can also play basic drainage effect, in addition, also, can improve the degree of consistency that electric core 2 surface electrolyte soaks.

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 small amount of the electrolyte directly infiltrates the surface of other regions of the battery cell 2, but the electrolyte 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 selection 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 4, 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 being beneficial to improving the smoothness of battery electrolyte injection operation, a technician can further implement corresponding technical means according to a battery structure to form corresponding method steps, which specifically include:

firstly, selecting a battery to be injected with electrolyte, arranging a liquid injection hole site 6 at the central position of the bottom surface of a shell of the battery, and aligning a middle space region 10 of a battery core 2 with the liquid injection hole site 6 when the battery core 2 is assembled in the battery so that the liquid injection hole site 6 is communicated with the middle space region 10;

injecting electrolyte into the battery from the arranged electrolyte injection hole 6 from bottom to top, 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 of the invention and in combination with the prior common general knowledge, the technical effect generated by the new technical scheme is not beyond the technical effect of the invention, for example, a liquid injection hole site is additionally arranged at the center of the bottom surface of a battery shell, 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 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, the model of a battery core 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.