Cover plate structure, battery shell and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a cover plate structure, a battery shell and a battery. The cover plate structure comprises a cover plate body and a sealing assembly mechanism. A liquid injection hole is formed in the cover plate body; the cover plate body is further provided with a limiting groove. The sealing assembly mechanism comprises a sealing part, a connecting part and a limiting part; the sealing component is connected to the interior of the liquid injection hole; the connecting part is connected to one side end, far away from the liquid injection hole, of the sealing part; the limiting component is connected to the connecting component; and the limiting part is detachably connected to the interior of the limiting groove. According to the utility model, the sealing performance of the liquid injection hole can be ensured; and the function of quickly opening the liquid injection hole can be realized, so that the use safety, convenience and stability are improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a cover plate structure, a battery casing and a battery. Background Technology

[0002] Lithium-ion batteries are widely used in electronic communications, energy storage devices, electric vehicles, and aerospace due to their advantages such as high specific energy, no pollution, and no memory effect. The electrolyte, as the medium for lithium-ion migration and charge transfer, is an indispensable component of lithium-ion batteries, and electrolyte injection is a critical step in the lithium battery production process. Furthermore, because lithium-ion batteries have high cycle requirements, electrolyte consumption and irreversible lithium extraction lead to a decline in cell performance.

[0003] However, most existing lithium-ion batteries use laser-welded sealing pins to seal the electrolyte filling holes in their casings. This method makes it impossible to disassemble and replenish electrolyte or lithium in the future, thus affecting the battery's continuous use and lifespan. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a cover plate structure, battery casing, and battery that can solve the technical problem that the assembly method of the liquid injection hole in the existing technology cannot be disassembled.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cover plate structure includes a cover plate body and a sealing assembly mechanism;

[0007] The cover plate is provided with an injection hole; the cover plate is also provided with a limiting groove;

[0008] The sealing assembly mechanism includes a sealing component, a connecting component, and a limiting component; the sealing component is connected to the inside of the injection hole; the connecting component is connected to the side of the sealing component away from the injection hole; the limiting component is connected to the connecting component; and the limiting component is detachably connected to the inside of the limiting groove.

[0009] Preferably, the cover plate body is further provided with a slot; the slot communicates with the limiting slot; and the limiting component is detachably connected to the slot.

[0010] Preferably, the limiting component includes a pressing component, a pushing component, and a fastening component; the pressing component is disposed inside the limiting groove; and one end of the pressing component is connected to the connecting component; the other end of the pressing component is movably connected to the pushing component; the pushing component is movably connected to the fastening component, so that the fastening component is detachably connected to the slot.

[0011] Preferably, the pressing assembly includes a first elastic element and a pressing plate; one end of the first elastic element is connected to the connecting component; the other end of the first elastic element is connected to the pressing plate; and the pressing plate is movably connected to one end of the pushing assembly.

[0012] And / or, the pushing assembly includes a pushing plate, a rotating connecting shaft, and a mounting plate; the mounting plate is movably connected to the bottom of the pressing assembly; the rotating connecting shaft is connected to the mounting plate; the middle part of the pushing plate is movably connected to the outer surface of the rotating connecting shaft; one end of the pushing plate abuts against the bottom of the pressing assembly; the other end of the pushing plate abuts against the fastening assembly.

[0013] Preferably, a third elastic element is provided between the bottom of the pressing plate and the mounting plate.

[0014] Preferably, the fastening assembly includes a locking block, a second elastic element, and a connecting block; the connecting block is connected to the bottom of the pushing assembly; one end of the second elastic element is connected to one side surface of the locking block; one side surface of the locking block is also movably connected to the pushing assembly; and the other side surface of the locking block away from the second elastic element is detachably connected to the locking slot.

[0015] Preferably, the connecting component includes a connecting plate; the connecting plate is connected to the side of the sealing component away from the injection hole; and the projection of the connecting plate toward the injection hole covers the injection hole.

[0016] Preferably, the cover plate body is further provided with a sealing groove; the sealing groove is connected to the limiting groove; and the sealing groove is provided with sealant; the sealant is connected to the connecting component.

[0017] This utility model also discloses a battery casing, including the aforementioned cover plate structure.

[0018] This utility model also discloses a battery, including the aforementioned battery casing.

[0019] The beneficial effects of this utility model are that the technical solution achieves the assembly and sealing of the injection hole by using connecting components and sealing components, and the upper limit component can be detachably assembled on the cover plate, thereby enabling the sealing component to be removed from the injection hole; thus ensuring the sealing performance of the injection hole; and also enabling the injection hole to be opened quickly, thereby improving the safety, convenience and stability of use, and meeting the requirements for replenishing electrolyte and lithium when the performance degrades. Attached Figure Description

[0020] The following will refer to the appendix. Figures 1-4 This section describes the features, advantages, and technical effects of exemplary embodiments of the present invention.

[0021] Figure 1 This is a cross-sectional view of the cover plate structure according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the cover plate structure in a static disassembled state according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the pressed and disassembled state of the cover plate structure according to an embodiment of the present invention;

[0024] Figure 4 This is a partial cross-sectional view of the cover plate structure according to an embodiment of the present utility model.

[0025] In the diagram: 100-Cover plate body; 101-Injection hole; 102-Limiting groove; 103-Card slot; 104-Sealing groove; 105-Sealant; 200-Sealing component; 210-First sealing section; 220-Second sealing section; 300-Connecting component; 301-Connecting plate; 400-Limiting component; 410-Pressing assembly; 411-First elastic element; 412-Pressing plate; 413-First mounting groove; 420-Pushing assembly; 421-Pushing plate; 422-Rotating connecting shaft; 423-Mounting plate; 424-Second mounting groove; 430-Snap-fitting assembly; 431-Card block; 4311-Vertical abutment section; 4312-Horizontal limiting section; 432-Second elastic element; 433-Connecting block; 440-Third elastic element; 500-Sealing assembly mechanism. Detailed Implementation

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or multiple situations existing alone. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0031] The following is in conjunction with the appendix Figures 1-4 The present invention will be described in further detail, but this is not intended to limit the scope of the present invention.

[0032] like Figure 1 and 2 As shown, in one embodiment of this utility model, the cover plate structure includes a cover plate body 100 and a sealing assembly mechanism 500. The cover plate body 100 has an injection hole 101 that extends through the thickness direction of the cover plate body 100. The cover plate body 100 also has a limiting groove 102. The sealing assembly mechanism 500 includes a sealing component 200, a connecting component 300, and a limiting component 400. The sealing component 200 is sealed to the inside of the injection hole 101. The connecting component 300 is connected to the side of the sealing component 200 away from the injection hole 101. The limiting component 400 is connected to the connecting component 300 and is detachably connected to the inside of the limiting groove 102. In some embodiments, the number of limiting grooves 102 is four, and they are arranged in an array on the cover plate body 100. The number and position of the limiting components 400 correspond to the number and position of the limiting grooves 102.

[0033] The technical solution of this utility model achieves the assembly and sealing effect of the injection hole by using connecting components and sealing components. In addition, the upper limit component can be detachably assembled on the cover plate, so that the sealing component can be removed from the injection hole. This ensures the sealing performance of the injection hole and also enables the injection hole to be opened quickly. Therefore, it improves the safety, convenience and stability of use, and can meet the requirements of electrolyte replenishment and lithium replenishment operations when the performance degrades.

[0034] Specifically, in some implementations, such as Figure 1 and 2 As shown, the connecting component 300 includes a connecting plate 301; the connecting plate 301 is connected to the side of the sealing component 200 away from the injection hole 101; and the projection of the connecting plate 301 toward the injection hole 101 covers the injection hole 101. That is, through the stacked assembly of the connecting plate 301 and the sealing component 200, a double assembly sealing effect on the injection hole is achieved; thereby ensuring the sealing performance of the injection hole.

[0035] Specifically, in some implementations, such as Figure 1 and 2 As shown in Figure 3, the cover plate 100 is also provided with a sealing groove 104; the sealing groove 104 is connected to the limiting groove 102; and the sealing groove 104 is provided with sealant 105; the sealant 105 is connected to the connecting component 300 (the side end surface of the connecting plate 301). When the limiting component 400 is assembled into the limiting groove 103, the sealing performance of this structure is further improved by the sealant 105. When electrolyte replenishment and lithium replenishment are required, the sealant 105 on the edge of the cover plate 100 is removed with a file or other tools, the limiting component 400 is then retracted, and the sealing component 200 is removed at the same time to perform electrolyte replenishment and lithium replenishment operations.

[0036] Specifically, in some implementations, such as Figure 1 and 2 As shown, the sealing component 200 includes a first sealing section 210 and a second sealing section 220 stacked together; the first sealing section 210 is connected to the connecting component 300 (middle connecting plate 301); at least a portion of the structure of the first sealing section 210 is connected to the interior of the injection hole 101; at least a portion of the structure of the second sealing section 220 is connected to the interior of the injection hole 101; and the width of the first sealing section 210 is greater than the width of the second sealing section 220. Wherein, as... Figure 1 , 2 As shown in Figure 3, the outer surface of the first sealing section 210 is entirely in contact with the inner wall of the injection hole 101; the outer surface of the second sealing section 220 is entirely in contact with the inner wall of the injection hole 101. In other words, the first sealing section 210 and the second sealing section 220 form a stepped structure with a narrow bottom to improve the stability of the assembly seal and prevent it from falling into the battery.

[0037] Specifically, in some implementations, such as Figure 1 and 2 As shown, the cover plate 100 also has a slot 103; the slot 103 communicates with the limiting groove 102; the limiting component 400 is detachably connected to the inner wall of the slot 103. The slot 103 and the limiting groove 102 form a T-shaped, L-shaped, or cross-shaped structure. That is, when electrolyte and lithium replenishment are required, the sealant 105 on the edge of the cover plate 100 is removed with a file or other tool, and the limiting component 400 is then pulled out from the slot 103 and the limiting groove 102 to perform the electrolyte and lithium replenishment operations.

[0038] Specifically, in some implementations, such as Figure 1 and 2 As shown in Figure 3, the limiting component 400 includes a pressing component 410, a pushing component 420, and a fastening component 430. The pressing component 410 is disposed inside the limiting groove 102. One end of the pressing component 410 is connected to the bottom surface of the connecting component 300 (middle connecting plate 301). The other end of the pressing component 410 is movably connected to the pushing component 420. The pushing component 420 is movably connected to the fastening component 430, so that the fastening component 430 is detachably connected to the slot 103. This structure, by pressing the connecting component 300 (middle connecting plate 301), pulls the pressing component 410 to perform a passive pressing movement, thereby driving the movement of the pushing component 420 and the fastening component 430, so as to realize the assembly and disassembly of the limiting component 400 with the slot 103 and the limiting groove 102; thereby improving the convenience of operation, realizing rapid liquid replenishment and lithium replenishment operations; and ensuring the stability of assembly.

[0039] Specifically, in some implementations, such as Figure 2 and 3 As shown, the pressing assembly 410 includes a first elastic element 411 and a pressing plate 412; one end of the first elastic element 411 is connected to the bottom surface of the connecting member 300 (middle connecting plate 301); the other end of the first elastic element 411 is connected to the top surface of the pressing plate 412; the pressing plate 412 is pushed and connected to one end of the pushing assembly 420. The first elastic element 411 is a first spring; furthermore, as... Figure 3 and 4 As shown, the pressing plate 412 has a first mounting groove 413 on the side surface facing the first elastic member 411; the first elastic member 411 is connected to the inner wall of the first mounting groove 413. This structure can achieve orderly and smooth pressing and pushing by the elastic back-and-forth recovery of the squeezing performance of the first elastic member 411, thereby improving operating efficiency.

[0040] Specifically, in some implementations, such as Figure 2 and 3As shown, the pushing assembly 420 includes a pushing plate 421, a rotating connecting shaft 422, and a mounting plate 423. The mounting plate 423 is movably connected to the bottom of the pressing assembly 410 (middle pressing plate 412). The rotating connecting shaft 422 is connected to the mounting plate 423. The middle part of the pushing plate 421 is movably connected to the outer surface of the rotating connecting shaft 422. One end of the pushing plate 421 abuts against the bottom of the pressing assembly 410 (middle pressing plate 412). The other end of the pushing plate 421 abuts against the fastening assembly 430. This structure uses the pressing and pushing action of the pressing assembly 410 (middle pressing plate 412) on one end of the pushing plate 421 to achieve a swinging motion of the other end of the pushing plate 421, thereby causing the fastening assembly 430 to assemble into and disassemble from the slot 103; thus achieving orderly and smooth pressing and pushing, thereby improving operational efficiency. For example, Figure 3 and 4 As shown, the mounting plate 423 has a second mounting groove 424 on the side facing the pressing assembly 410 (middle pressing plate 412); the pressing assembly 410 (middle pressing plate 412) is movably connected to the inside of the second mounting groove 424; and one end of the push plate 421 is oscillatingly disposed inside the second mounting groove 424; to improve the safety and smoothness of the oscillation of the push plate 421, thereby improving operational efficiency. Furthermore, as... Figure 3 and 4 As shown, a third elastic element 440 is provided between the bottom of the pressing assembly 410 (middle pressing plate 412) and the mounting plate 423 (middle second mounting groove 424). The third elastic element 440 is a third spring; to ensure the assembly stability between them and to ensure the smoothness of the pressing movement.

[0041] Specifically, in some implementations, such as Figure 2 and 3 As shown, the fastening assembly 430 includes a locking block 431, a second elastic member 432, and a connecting block 433; the connecting block 433 is connected to the bottom of the pushing assembly 420 (middle mounting plate 423); one end of the second elastic member 432 is connected to one side surface of the locking block 431; one side surface of the locking block 431 is also movably connected to the pushing assembly 420 (middle pushing plate 421); and the other side surface of the locking block 431 away from the second elastic member 432 is detachably connected to the locking slot 103. The second elastic member 432 is a second spring. Further, as... Figure 3 and 4 As shown, the card block 431 includes a vertically inclined (vertically) abutting section 4311 and a horizontally limiting section 4312; one end of the second elastic member 432 and the push assembly 420 (middle push plate 421) are respectively connected to the vertically abutting section 4311; the horizontally limiting section 4312 is detachably connected to the card slot 103.

[0042] This utility model also proposes a battery casing, which includes a cover plate structure and a bottom shell, with a placement cavity inside the bottom shell; an opening is provided at the top inner part of the bottom shell; the opening communicates with the placement cavity; and the cover plate structure is disposed at the opening. The specific structure of the cover plate structure is as described in the above embodiments. Since this battery casing adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] This utility model also proposes a battery, which includes a battery casing. The specific structure of the battery casing is as described in the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0044] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes to generate an electric current. With technological advancements, the term "battery" now generally refers to any small device that generates electrical energy, such as a solar cell. The main performance parameters of a battery are electromotive force, capacity, specific energy, and resistance. The principle of a battery is that chemical energy is directly converted into electrical energy through spontaneous oxidation and reduction reactions within the battery. These reactions occur at the two electrodes. The negative electrode active material consists of a reducing agent with a negative potential and stable in the electrolyte, such as active metals like zinc, cadmium, and lead, and hydrogen or hydrocarbons. The positive electrode active material consists of an oxidizing agent with a positive potential and stable in the electrolyte, such as metal oxides like manganese dioxide, lead dioxide, and nickel oxide, oxygen or air, halogens and their salts, and oxyacids and their salts. The electrolyte is a material with good ionic conductivity, such as aqueous solutions of acids, bases, and salts, organic or inorganic non-aqueous solutions, molten salts, or solid electrolytes.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A cover plate structure, characterized in that: Includes the cover plate and sealing assembly mechanism; The cover plate is provided with an injection hole; the cover plate is also provided with a limiting groove; The sealing assembly mechanism includes a sealing component, a connecting component, and a limiting component; the sealing component is connected to the inside of the injection hole; the connecting component is connected to the side of the sealing component away from the injection hole; the limiting component is connected to the connecting component; and the limiting component is detachably connected to the inside of the limiting groove.

2. The cover plate structure according to claim 1, characterized in that: The cover plate body is also provided with a slot; the slot is connected to the limiting slot; and the limiting component is detachably connected to the slot.

3. The cover plate structure according to claim 2, characterized in that: The limiting component includes a pressing component, a pushing component, and a fastening component; the pressing component is disposed inside the limiting groove; one end of the pressing component is connected to the connecting component; the other end of the pressing component is movably connected to the pushing component; the pushing component is movably connected to the fastening component, so that the fastening component is detachably connected to the slot.

4. The cover plate structure according to claim 3, characterized in that: The pressing assembly includes a first elastic element and a pressing plate; one end of the first elastic element is connected to the connecting component; the other end of the first elastic element is connected to the pressing plate; and the pressing plate is movably connected to one end of the pushing assembly. And / or, the pushing assembly includes a pushing plate, a rotating connecting shaft, and a mounting plate; the mounting plate is movably connected to the bottom of the pressing assembly; the rotating connecting shaft is connected to the mounting plate; the middle part of the pushing plate is movably connected to the outer surface of the rotating connecting shaft; one end of the pushing plate abuts against the bottom of the pressing assembly; the other end of the pushing plate abuts against the fastening assembly.

5. The cover plate structure according to claim 4, characterized in that: A third elastic element is provided between the bottom of the pressing plate and the mounting plate.

6. The cover plate structure according to claim 4 or 5, characterized in that: The fastening assembly includes a locking block, a second elastic element, and a connecting block; the connecting block is connected to the bottom of the pushing assembly; one end of the second elastic element is connected to one side surface of the locking block; one side surface of the locking block is also movably connected to the pushing assembly; and the other side surface of the locking block away from the second elastic element is detachably connected to the locking slot.

7. The cover plate structure according to claim 1, characterized in that: The connecting component includes a connecting plate; the connecting plate is connected to the side of the sealing component away from the injection hole; and the projection of the connecting plate toward the injection hole covers the injection hole.

8. The cover plate structure according to claim 1, characterized in that: The cover plate is also provided with a sealing groove; the sealing groove is connected to the limiting groove; and the sealing groove is provided with sealant; the sealant is connected to the connecting component.

9. A battery casing, characterized in that: Includes the cover plate structure as described in any one of claims 1 to 8.

10. A battery, characterized in that: Includes the battery casing as described in claim 9.

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