Battery liquid injection bell jar

Abstract

The utility model discloses a battery liquid injection bell jar which comprises a bell jar body and a battery tray rack arranged in the bell jar body, and further comprises a filler arranged in the bell jar body, and the filler at least fills partial cavity between the inner wall of the bell jar body and the battery tray rack. According to the battery liquid injection bell jar provided by the utility model, the filler is arranged in the bell jar body, and at least part of the cavity between the inner wall of the bell jar body and the battery tray rack is filled with the filler, so that the air volume in the liquid injection bell jar is reduced, the air quantity in the liquid injection bell jar is reduced, and the use amount of protective gas in the liquid injection process is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a liquid injection bell jar. Background Art

[0002] Lithium battery liquid injection is one of the key steps in the process of manufacturing lithium batteries, mainly involving injecting electrolyte between the electrodes inside the battery.

[0003] The battery liquid injection bell jar is an important liquid injection device used in the process of lithium battery liquid injection. Its main function is to inject electrolyte into the battery. The liquid injection bell jar is crucial for ensuring the performance and production efficiency of lithium batteries. The liquid injection bell jar mainly includes a sealed bell jar. During the liquid injection operation, the battery to be injected is installed inside the bell jar, and then the air inside the bell jar is evacuated, including water vapor and dust in the air, etc. Then, a protective gas is filled into the bell jar to achieve gas protection for the lithium battery, providing a sealed, constant temperature, constant pressure, and dry environment for lithium battery liquid injection, ensuring the normal progress of lithium battery liquid injection and the performance of the lithium battery after injection.

[0004] In addition, after the operation of injecting electrolyte into the lithium battery is completed, in order to avoid sudden changes in the internal pressure of the battery, it may be chosen to slowly release the internal protective gas to allow the lithium battery to gradually adapt to the external environment. After the liquid injection operation, the protective gas inside the liquid injection bell jar may contain volatile acidic gas molecules, and the protective gas inside the liquid injection bell jar needs to be recovered and treated before being discharged or reused, or it can be directly discharged or directly reused if it meets the direct emission standard.

[0005] In the above process of using, recovering, treating, discharging, or reusing the protective gas, a large amount of protective gas is required, and the consumption of the protective gas is huge. At the same time, in the early stage, when the air inside the liquid injection bell jar is pumped out, the amount of air pumped out is also large, the pumping time is long, and the energy consumption for pumping gas is large, which does not meet the requirements of energy conservation and environmental protection. Summary of the Utility Model

[0006] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a battery liquid injection bell jar. By arranging fillers inside the bell jar body, the fillers at least fill part of the cavity between the inner wall of the bell jar body and the battery tray rack, reducing the air volume inside the liquid injection bell jar, reducing the amount of air inside the liquid injection bell jar, and further reducing the consumption of the protective gas during the liquid injection process.

[0007] The technical solution adopted by the utility model to solve its problems is:

[0008] A battery liquid injection bell cover includes a bell cover body and a battery tray rack disposed inside the bell cover body, and further includes a filler disposed inside the bell cover body, and the filler at least fills a part of the cavity between the inner wall of the bell cover body and the battery tray rack.

[0009] Further: The filler is disposed at the bottom of the battery tray rack and fills a part of the cavity between the bottom of the battery tray rack and the inner bottom surface of the bell cover body.

[0010] Further: The filler is disposed outside the battery tray rack, and the position of the filler is not higher than the top of the battery tray rack, and the filler fills a part of the cavity between the outside of the battery tray rack and the inner side surface of the bell cover body.

[0011] Further: The filler is a block, and the shape and / or size of the block are set according to the cavity to be filled.

[0012] Further: The filler is a PE block, and the shape and / or size of the PE block are cut or directly formed according to the shape and / or size of the cavity to be filled.

[0013] Further: The filler is fixedly installed on the inner wall of the bell cover body.

[0014] Further: The bell cover body includes an upper cover body and a lower cover body, and the height of the upper cover body is greater than the height of the lower cover body. The upper cover body at least includes a first round top, and the lower cover body at least includes an inverted second round top. The upper cover body and the lower cover body are detachably and sealingly installed.

[0015] Further: A supporting part is also fixedly provided inside the bell cover body. The supporting part is fixedly installed on the inner side wall and / or the inner bottom surface of the bell cover body, and the battery tray rack is placed on the supporting part.

[0016] Further: The supporting part includes two supporting bars oppositely arranged along the axis of the bell cover body. The supporting bars are fixedly installed on the inner side wall and / or the inner bottom surface of the bell cover body, and the battery tray rack is erected on the two supporting bars.

[0017] Further: The battery tray rack includes a plurality of rack body columns and a plurality of cross beams. Both ends of each cross beam are fixedly connected to the rack body columns. A battery tray is fixed on the cross beam, and a socket cup is fixed on the battery tray. When injecting liquid, the battery is fixed in the socket cup.

[0018] In summary, a battery liquid injection bell cover provided by the present utility model has the following technical effects:

[0019] 1. Fillers are arranged inside the bell jar body, and the fillers at least fill a part of the cavity between the inner wall of the bell jar body and the battery tray rack, reducing the cavity volume between the inner wall of the bell jar body and the battery tray rack inside the bell jar body, that is, reducing the volume of air inside the bell jar body, which also means reducing the amount of protective gas used in the liquid injection operation, thus achieving energy conservation and environmental protection.

[0020] 2. The fillers fill the bottom and / or the side of the battery tray rack to prevent the fillers from falling and affecting the safety of the lithium batteries on the battery tray rack and the normal liquid injection operation of the lithium batteries on the battery tray rack.

[0021] 3. The fillers are in block shape and made of PE material, which has the functions of pressure resistance and corrosion resistance, prolonging the service life of the fillers. At the same time, it also ensures that the fillers will not affect or interfere with the liquid injection process, nor will it affect the quality and performance of the lithium batteries after liquid injection. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the external structure of a battery liquid injection bell jar of the present utility model.

[0023] Figure 2 It is a schematic structural diagram of an embodiment of the internal structure of a battery liquid injection bell jar of the present utility model.

[0024] Figure 3 It is a schematic structural diagram of an embodiment of the battery tray rack in the present utility model.

[0025] Among them, the meanings of the reference numerals are as follows:

[0026] 1. Bell jar body; 11. Upper cover body; 111. First round top; 12. Lower cover body; 121. Second round top; 13. Support part; 2. Battery tray rack; 21. Rack body column; 22. Cross beam; 23. Battery tray; 24. Sleeve cup; 25. Lithium battery; 3. Filler; 31. First filler; 32. Second filler. Detailed Embodiment

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0030] Refer to Figure 1 and Figure 2 , the present utility model discloses a battery filling bell jar.

[0031] A battery filling bell jar includes a bell jar body 1 and a battery tray rack 2 disposed inside the bell jar body 1, and further includes a filler 3 disposed inside the bell jar body 1. The filler 3 fills at least a part of the cavity between the inner wall of the bell jar body 1 and the battery tray rack 2.

[0032] The filling bell jar is an important device used during the filling of lithium batteries. It provides a closed environment for the main battery filling, can control the internal humidity, temperature and gas composition, and ensure that the filling process is carried out under optimal conditions. At the same time, it can also prevent dust, moisture and other contaminants from entering the battery interior and ensure the cleanliness of the battery. During the filling process, by filling the filling bell jar with an inert gas as a protective gas, such as nitrogen or argon, it can prevent the internal materials of the battery from contacting the air and avoid oxidation and other chemical reactions. During the filling process, by filling the filling bell jar with an inert gas as a protective gas, it can control and regulate the internal pressure and ensure the stability of the battery structure. In addition, the filling operation is carried out inside the filling bell jar, and the filling bell jar serves as a protective barrier for on-site operators, preventing possible chemical splashes or other hazards during the filling process and preventing the volatilization of electrolytes, etc. to the external environment during filling, ensuring the stability, safety and comfort of the working environment.

[0033] Generally, after installing the battery tray rack 2 inside the bell jar body 1, there will inevitably be some cavities or gaps between the inner wall of the bell jar body 1 of the liquid injection bell jar and the battery tray rack 2. Before the liquid injection operation, these cavities or gaps are filled with air; during the liquid injection operation, it is necessary to extract the air in these cavities or gaps and fill the liquid injection bell jar with a protective gas, and the protective gas will also enter these cavities or gaps; after the liquid injection, the protective gas in these cavities or gaps will be discharged. In these above processes, it takes more time to extract the air or protective gas in these cavities or gaps, and it takes even more protective gas to fill these cavities or gaps, resulting in waste of the protective gas during the liquid injection operation. After the liquid injection operation, more protective gas needs to be processed, which does not meet the requirements of energy conservation and environmental protection.

[0034] Based on the above solution, by using a filler to fill the cavity or part of the space between the inner wall of the bell jar body 1 and the battery tray rack 2, the normal progress of the lithium battery liquid injection operation will not be affected after filling. In addition, the time for extracting the air in the liquid injection bell jar before the liquid injection operation is shortened. After the liquid injection operation, the time for discharging the protective gas is shortened, improving the efficiency of the liquid injection operation. At the same time, during the liquid injection operation, the consumption of the protective gas is reduced. After the liquid injection operation, the amount of the protective gas that needs to be processed is reduced, meeting the requirements of energy conservation and environmental protection.

[0035] Based on the above solution, the filler 3 fills at least part of the cavity between the inner wall of the bell jar body 1 and the battery tray rack 2. According to the operation requirements when installing the filler and the space inside the bell jar body, on the premise of ensuring the safety and normal operation of the liquid injection operation, as much as possible of the entire cavity or part of the cavity between the inner wall of the bell jar body 1 and the battery tray rack 2 is filled.

[0036] Before and after the liquid injection, it is necessary to extract the air in the bell jar body and fill the bell jar body with a protective gas, and the pressure inside the bell jar body changes. In this solution, in order to prevent the filler filled between the inner wall of the bell jar body 1 and the battery tray rack 2 from falling off and affecting the normal progress of the battery liquid injection, generally, the filler 3 is placed at the bottom of the battery tray rack 2 and fills part of the cavity between the bottom of the battery tray rack 2 and the inner bottom surface of the bell jar body 1. The filler 3 is placed at the bottom of the battery tray rack 2. During the liquid injection operation, or before and after the liquid injection, if the filler accidentally falls off or drops, etc., it will not affect the battery tray rack 2 and the liquid injection battery on the battery tray rack 2, ensuring the normal progress of the battery liquid injection.

[0037] Furthermore, the filler 3 can also be placed on the outside of the battery tray rack 2, and the filler 3 is set at a position not higher than the top of the battery tray rack 2, and the filler 3 fills part of the cavity between the outside of the battery tray rack 2 and the inner side of the bell housing body 1. The filler 3 is placed on the outside of the battery tray rack 2. During the injection operation, or before and after the injection, if the filler accidentally falls off or drops, it will not affect the battery tray rack 2 and the injected batteries on the battery tray rack 2, and the battery injection can be ensured to proceed normally.

[0038] Furthermore, in order to fill more cavities between the inner wall of the bell housing body 1 and the battery tray rack 2, fillers can be placed on the outside and bottom of the battery tray rack 2 to fill the cavities or gaps on the outside and bottom of the battery tray rack 2 respectively.

[0039] In order to facilitate the installation of the filler and ensure that the filler does not splash during the battery filling process, which will not affect the normal battery filling operation, in this solution, the filler 3 is a block, and the shape and / or size of the block is set according to the cavity to be filled. The filler is a block, which is convenient for the installation and fixation of the filler in the bell jar body. At the same time, after installation and fixation, the filler is not easy to fall off, and the filler will not splash during the filling process, which will not affect the normal operation of the battery filling.

[0040] Furthermore, in this solution, the filler 3 is a PE block, and the shape and / or size of the PE block is cut or directly formed according to the shape and / or size of the cavity to be filled. The filler 3 is a PE block, which has pressure resistance and corrosion resistance, prolongs the service life of the filler, and also ensures that the filler will not affect and interfere with the injection process, nor affect the quality and performance of the lithium battery after injection.

[0041] Generally, inside the bell jar body, the battery tray 23 and the sleeve cup 24 installed on the battery tray rack 2 are all made of PE material, and the filler 3 is made of the same material as the original structure inside the bell jar body. On the one hand, it achieves an anti-corrosion effect, and on the other hand, it avoids the filler from reacting with volatile acidic gases during the injection operation, thereby affecting the normal injection operation in the injection bell jar.

[0042] The shape and / or size of the filler made of PE material is cut or directly formed according to the shape and / or size of the cavity to be filled. Because the internal shape of the injection bell is not necessarily regular, the bottom and outside of the battery tray rack 2 can be cut according to the size and shape of the space, so that the PE block can fill more cavities at the bottom and outside of the battery tray rack 2. Figure 2 As shown, the bottom and sides of the battery tray rack 2 are respectively filled with a plurality of PE blocks of different sizes.

[0043] In this technical solution, the filler 3 is fixedly installed on the inner wall of the bell jar body 1. Further, the filler 3 is detachably installed on the inner wall of the bell jar body 1. Installing the filler and the bell jar body ensures reliable installation, and after installation, they are integrated as a whole. At the same time, it does not affect operations such as replacing and moving the battery tray rack 2 inside the bell jar, making the filler highly adaptable and prolonging its service life.

[0044] To improve the pressure-holding capacity of the bell jar body itself and ensure that the bell jar body can provide a stable pressure environment for the battery liquid injection operation, in this technical solution, the bell jar body 1 includes an upper cover body 11 and a lower cover body 12, and the height of the upper cover body 11 is greater than the height of the lower cover body 12. The upper cover body 11 at least includes a first round top 111, and the lower cover body 12 at least includes an inverted second round top 121. The upper cover body 11 and the lower cover body 12 are detachably and hermetically installed. In the structure of the bell jar body, the first round top 111 and the second round top 121 play a major role in improving the pressure-holding capacity of the bell jar body. At the same time, for this structure of the bell jar body, after the liquid injection is completed and when discharging nitrogen, it can also ensure that the pressure changes at each position inside the bell jar are consistent, avoiding sudden changes in the internal pressure of the battery. It may choose to slowly release the internal protective gas to allow the lithium battery to gradually adapt to the external environment.

[0045] Of course, to facilitate the loading and unloading of the lithium battery inside the bell jar body before and after the liquid injection bell jar operation, a bell jar door is also provided on the bell jar body 1. The bell jar door can be set on the upper cover body 11 and / or the lower cover body 12. Of course, it can also be achieved by the rising or falling of the upper cover body 11 and / or the lower cover body 12 to separate the upper cover body 11 from the lower cover body 12, facilitating the exposure of the battery tray rack 2 inside the bell jar body, and then the battery on the battery tray rack 2 can be decorated manually or by a manipulator, etc.

[0046] In this technical solution, to facilitate the installation of the battery tray rack 2, a supporting part 13 is fixedly provided inside the bell jar body 1. The supporting part 13 is fixedly installed on the inner side wall and / or the inner bottom surface of the bell jar body 1, and the battery tray rack 2 is placed on the supporting part 13. The internal structure of the bell jar body is not necessarily regular or flat. Setting the supporting part 13 provides an installation position or a fixed position for the battery tray rack 2, ensuring that the battery tray rack 2 is stably placed inside the bell jar body, avoiding problems such as shaking or tilting of the battery tray rack 2 inside the bell jar body, ensuring the fixed installation position of the battery tray rack 2, and facilitating the connection or conduction of each pipeline with the battery fixed on the battery tray rack 2.

[0047] To simplify the structure of the supporting part, in this technical solution, the supporting part 13 includes two supporting bars arranged opposite to each other along the axis of the bell jar body 1. The supporting bars are fixedly installed on the inner side wall and / or the inner bottom surface of the bell jar body 1, and the battery tray rack 2 is erected on the two supporting bars.

[0048] In this solution, the battery tray rack 2 includes a number of rack body columns 21 and a number of cross beams 22. Both ends of each cross beam 22 are fixedly connected to the rack body columns 21. A battery tray 23 is fixed on the cross beam 22, and a socket cup 24 is fixed on the battery tray 23. During liquid injection, the battery is fixed in the socket cup 24. When the battery tray rack 2 is erected on the two supporting bars, that is, the rack body columns 21 are placed on the supporting bars, the installation of the battery tray rack 2 inside the bell jar body is convenient and stable.

[0049] The technical means disclosed in the technical solution of the present utility model is not limited to the technical means disclosed in the above embodiments, but also includes the technical solutions formed by any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A battery liquid injection bell cover, comprising a bell cover body and a battery tray rack arranged in the bell cover body, characterized in that: It also includes a filler arranged inside the bell housing body, and the filler at least fills a portion of the cavity between the inner wall of the bell housing body and the battery tray frame.

2. The battery liquid injection bell jar according to claim 1, characterized in that: The filler is placed at the bottom of the battery tray frame and fills a portion of the cavity between the bottom of the battery tray frame and the inner bottom surface of the bell housing body.

3. The battery filling bell jar according to claim 1 or 2, characterized in that: The filler is placed on the outside of the battery tray frame, and the setting position of the filler is not higher than the top of the battery tray frame. The filler fills a part of the cavity between the outside of the battery tray frame and the inner side of the bell housing body.

4. The battery liquid injection bell cover according to claim 1, characterized in that: The filler is a block, and the shape and / or size of the block is set according to the cavity to be filled.

5. The battery liquid injection bell cover according to claim 4, characterized in that: The filler is a PE block, and the shape and / or size of the PE block is cut or directly formed according to the shape and / or size of the cavity to be filled.

6. The battery liquid injection bell cover according to claim 1 or 4 or 5, characterized in that: The filler is fixedly mounted on the inner wall of the bell housing body.

7. The battery filling bell jar according to claim 1, wherein: The bell jar body includes an upper jar body and a lower jar body, and the height of the upper jar body is greater than that of the lower jar body. The upper jar body includes at least a first dome portion, and the lower jar body includes at least an inverted second dome portion. The upper jar body and the lower jar body are detachably and sealedly installed.

8. The battery filling bell jar according to claim 1, characterized in that: A supporting portion is also fixedly provided in the bell housing body. The supporting portion is fixedly mounted on the inner side wall and / or inner bottom surface of the bell housing body, and the battery tray is mounted on the supporting portion.

9. The battery liquid injection bell cover according to claim 8, wherein: The supporting part includes two supporting bars arranged opposite to each other with respect to the axis of the bell housing body, the supporting bars are fixedly mounted to the inner side wall and / or the inner bottom surface of the bell housing body, and the battery tray rack is mounted on the two supporting bars.

10. The battery filling bell jar according to claim 1 or 8 or 9, characterized in that: The battery tray rack includes a plurality of frame columns and a plurality of cross beams, both ends of each of the cross beams are fixedly connected to the frame columns, the cross beams are fixed with battery trays, and the battery trays are fixed with sleeve cups. When injecting liquid, the batteries are fixed in the sleeve cups.

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