Battery cover plate structure and battery
By incorporating an electrolyte display component and observation channel into the battery cover structure, electrolyte leakage can be detected in real time, thus resolving the safety hazard of electrolyte leakage during lithium-ion battery production and improving detection efficiency and safety.
Patent Information
- Application Number
- CN202422552871.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-10-22
AI Technical Summary
Existing lithium-ion batteries are prone to electrolyte leakage during production due to issues such as poor welding, lack of sealing, and incomplete welding, posing safety hazards. Current detection methods cannot effectively identify minute gaps, leading to excessive thickness, low capacity, short circuits, and explosion risks in lithium-ion batteries.
An electrolyte display component is installed in the battery cover structure to detect electrolyte leakage in real time through the observation channel. Test paper or transparent parts are used to detect electrolyte leakage, thereby improving detection efficiency and safety.
It enables rapid detection of electrolyte leakage, improves the safety and stability of lithium-ion batteries, and reduces the risks associated with leakage.
Smart Images
Figure CN223566732U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to battery technical field especially relates to a battery cover plate structure and battery. BACKGROUND
[0002] Lithium ion battery is the most popular in the field of new energy at present, especially in the automobile and energy storage field. In the lithium ion production process, because of the problems such as welding not firm, not sealing, welding leakage, leakage crack at the welding seam and other problems in the manufacturing process, the electrolyte leakage may occur, once the leakage enters the battery internal, it will cause the lithium ion battery to be too thick, low capacity, and even short circuit, fire and explosion and other safety problems.
[0003] After the general square aluminum shell is cleaned in the lithium ion cell production process, it will enter the high temperature aging process, and the current screening method is mostly through artificial visual inspection method. But often because of the welding sand eye and the sealing nail and the slight gap of the explosion-proof valve are not observed by naked eye, so the leakage will cause fire or explosion risk, and the safety performance and stability performance in use are reduced. UTILITY MODEL CONTENTS
[0004] The utility model discloses a battery cover plate structure and battery, which can solve the technical problems of low safety performance and stability performance in use of the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A battery cover plate structure, comprising a main body and an electrolyte display component, a liquid injection through hole is arranged on the main body, the liquid injection through hole penetrates the thickness of the main body, the electrolyte display component is arranged at the liquid injection through hole, an observation channel is arranged in the electrolyte display component, the observation channel is communicated with the liquid injection through hole, and the projection of the electrolyte display component towards the liquid injection through hole covers the liquid injection through hole.
[0007] Preferably, the battery cover plate structure further comprises an adhesive piece, the electrolyte display component is connected to the adhesive piece, the adhesive piece is connected to the main body at the liquid injection through hole, and the observation channel is formed between the adhesive piece and the main body.
[0008] Preferably, the electrolyte display component comprises a test paper, and the test paper is arranged at the liquid injection through hole.
[0009] Preferably, the relationship between the thickness H2 of the test paper and the thickness H1 of the main body satisfies H2≤H1.
[0010] Preferably, the adhesive member is connected to the inner side surface of the main body and is arranged at the opening on the inside of the liquid injection through hole; the test paper and the main body are arranged at two side ends of the adhesive member respectively; and the projection of the test paper towards the liquid injection through hole covers the liquid injection through hole.
[0011] Preferably, the adhesive member is connected to the outer side surface of the main body and is arranged at the opening on the outside of the liquid injection through hole; the test paper is arranged inside the liquid injection through hole; and the relationship among the outer diameter D4 of the adhesive member, the inner diameter D3 of the adhesive member, the diameter D2 of the test paper and the inner diameter D1 of the liquid injection through hole satisfies: D4>D1≥D2>D3.
[0012] Preferably, the electrolyte display component comprises a see-through member; the see-through member is connected to the adhesive member; and the projection of the see-through member towards the liquid injection through hole covers the liquid injection through hole.
[0013] Preferably, the see-through member and the main body are arranged at two side ends of the adhesive member respectively; the see-through member is arranged on the inner side surface of the main body; and the projection of the see-through member towards the liquid injection through hole covers the liquid injection through hole.
[0014] Preferably, when the electrolyte display component is composed of a see-through member and a test paper, the see-through member is connected to the side surface of the adhesive member away from the main body; the test paper and the see-through member are arranged on two side surfaces of the adhesive member respectively; and the test paper is arranged inside the liquid injection through hole.
[0015] The utility model discloses still a kind of battery, including cover, shell and electric core body, the cover is connected to the shell;The electric core body is arranged between the cover and the shell;And the cover is the battery cover plate structure described above.
[0016] The utility model has the advantages that the electrolyte display component is assembled to the liquid injection through hole, when the electrolyte in the main body leaks, it will contact the electrolyte display component for detection, and then the leakage of electrolyte is obtained in real time by observing the channel, so as to improve the speed of detecting the leakage of electrolyte, and then improve the safety and stability of use, and improve the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0017] The features, advantages and technical effects of the exemplary embodiments of the utility model will be described below with reference to the accompanying drawings. Figures 1-6
[0018] Figure 1 It is the whole structure schematic view of the battery cover plate structure of an embodiment of the utility model.
[0019] Figure 2 The battery cover plate structure of one embodiment of the utility model is shown in the exploded view;
[0020] Figure 3 The battery cover plate structure of one embodiment of the utility model is shown in the sectional view;
[0021] Figure 4 The battery cover plate structure of another embodiment of the utility model is shown in the sectional view;
[0022] Figure 5 The battery cover plate structure of another embodiment of the utility model is shown in the sectional view;
[0023] Figure 6 The battery cover plate structure of another embodiment of the utility model is shown in the sectional view;
[0024] In the figure: 1-main body;11-liquid injection through hole;12-positive pole column mounting hole;13-explosion-proof valve mounting hole;14-code marking mounting hole;15-negative pole column mounting hole;2-electrolyte display component;201-observation channel;21-detection test paper;22-adhesive;23-see-through part;100-cover;200-housing;300-battery core body. DETAILED DESCRIPTION
[0025] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the description and the drawings of the specification and the appended claims should be considered in conjunction with the summary of the application and the abstract; the terms "comprising," "having," "including," and "containing" used herein are meant to be open-ended and non-limiting.
[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.
[0027] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0028] In the description of the embodiments of the present application, the term "and / or" is only to describe the relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and multiple cases exist alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.
[0029] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0030] The following will be described in detail in combination with the accompanying drawings Figures 1-6 The utility model will be described in further detail, but not as the limitation of the utility model.
[0031] As Figure 1 As shown in the utility model embodiment, the battery cover plate structure, including main body 1 and electrolyte display component 2, the main body 1 is equipped with liquid injection through hole 11, the liquid injection through hole passes through the thickness of the main body 1 and is arranged, the electrolyte display component 2 is arranged at the liquid injection through hole 11, the electrolyte display component 2 is equipped with observation channel 201, the observation channel 201 is communicated with the liquid injection through hole 11, and the projection of the electrolyte display component 2 towards the liquid injection through hole 11 covers the liquid injection through hole 11.
[0032] The technical scheme of the utility model is that the electrolyte display component is assembled to the liquid injection through hole, when the electrolyte in the main body leaks, it will contact the electrolyte display component for detection, and then the leakage of the electrolyte is obtained in real time through the observation channel, so that the speed of detecting the leakage of the electrolyte is improved, and then the safety and stability of use are improved, and the detection efficiency is improved.
[0033] Specifically, in some embodiments, as Figure 2 And 3 As shown in the utility model embodiment, the battery cover plate structure further includes an adhesive member 22, the electrolyte display component 2 is connected to the adhesive member 22, and the adhesive member 22 is connected to the main body 1 at the liquid injection through hole 11, and the observation channel 201 (preferably, the observation channel 201 is arranged in the middle of the adhesive member 22) is formed between the adhesive member 22 and the main body 1. Wherein, the adhesive member 22 is double-sided adhesive. The structure can improve the stability and convenience of the assembly of the electrolyte display component 2 through the adhesive member 22, and can also reduce the difficulty of assembly.
[0034] Specifically, in some embodiments, as shown in Figure 2 and 3 , the electrolyte display component 2 comprises a detection test paper 21; the detection test paper 21 is arranged at the liquid injection through hole 11. Wherein, the detection test paper 21 is a pH test paper; that is, since the electrolyte itself is weakly acidic, when encountering the pH test paper, the pH test paper will change color; therefore, by adding a pH test paper outside the welding position of the liquid injection through hole 11 after welding and sealing the liquid injection through hole 11, when leakage occurs, the pH test paper will immediately change color, and the leakage of the battery liquid injection hole can be quickly observed through the observation channel 201, so that the leakage battery can be found in time, and the safety of the battery can be improved.
[0035] Specifically, in some embodiments, as shown in Figure 3 , the relationship between the thickness H2 of the detection test paper 21 and the thickness H1 of the main body 1 satisfies: H2≤H1. This structure can effectively reduce the use of materials, reduce the use cost, and also effectively reduce the unevenness of the overall cover plate structure; and guarantee the safety of use.
[0036] Specificly, in some other embodiments, as shown in Figure 4 , the adhesive 22 is connected to the inner side surface of the main body 1 and is arranged at the opening of the inner side of the liquid injection through hole 11; the detection test paper 21 and the main body 1 are respectively arranged at the two side ends of the adhesive 22; and the projection of the detection test paper 21 towards the liquid injection through hole 11 covers the liquid injection through hole 11. (Wherein, the side surface of the main body 1 close to the electrolyte is the inner side surface of the main body 1; the opening of the liquid injection through hole 11 close to the electrolyte is the opening of the inner side of the liquid injection through hole 11) Wherein, as shown in Figure 4 , the adhesive 22 is a ring-shaped double-sided tape. At this time, the relationship between the diameter D0 of the detection test paper 21 and the inner diameter D1 of the liquid injection through hole 11 satisfies: D0>D1. That is, the electrolyte display component 2 is only a single-layer structure of the detection test paper 21, and the detection test paper 21 is arranged below the inner side of the liquid injection through hole 11; when the liquid injection through hole 11 leaks, the detection personnel can observe the color change of the PH test paper through the observation channel 201 to identify the leakage battery.
[0037] Specificly, in some other embodiments, as shown in Figure 3As shown, the adhesive 22 is connected to the outer surface of the main body 1 and is arranged at the opening outside the liquid injection through hole 11; the test paper 21 is arranged inside the liquid injection through hole 11; and the relationship between the outer diameter D4 of the adhesive 22, the inner diameter D3 of the adhesive 22, the diameter D2 of the test paper 21 and the inner diameter D1 of the liquid injection through hole 11 satisfies: D4>D1≥D2>D3. That is, the electrolyte display component 2 is only a single-layer structure of the test paper 21, and the adhesive 22 is exposed on the outer surface of the main body 1; when the liquid injection through hole 11 leaks, the vision of the detection personnel can pass through the observation channel 201 to observe the color change of the PH test paper to identify the leaking battery.
[0038] Specifically, in some embodiments, as shown in Figure 2 As shown, the electrolyte display component 2 includes a perspective piece 23; the perspective piece 23 is connected to the adhesive 22; and the projection of the perspective piece 23 towards the liquid injection through hole 11 covers the liquid injection through hole 11. Wherein, the perspective piece 23 is a transparent PET film; this structure can quickly and obliquely observe whether there is liquid leakage, thereby improving the stability and safety of use.
[0039] Specifically, in some embodiments, as shown in Figure 5 As shown, the perspective piece 23 and the main body 1 are respectively arranged at both sides of the adhesive 22; and the projection of the perspective piece 23 towards the liquid injection through hole 11 covers the liquid injection through hole 11. The adhesive 22 is a ring-shaped double-sided adhesive. At this time, the diameter D 01 of the perspective piece 23 and the inner diameter D1 of the liquid injection through hole 11 satisfy: D 01 >D1. That is, the electrolyte display component 2 is only a single-layer structure of the perspective piece 23, and the perspective piece 23 is arranged below the liquid injection through hole 11; when the liquid injection through hole 11 leaks, the vision of the detection personnel can pass through the observation channel 201 to observe whether the perspective piece 23 is attached with electrolyte to identify the leaking battery.
[0040] Specifically, in some embodiments, as shown in Figure 2 and 3As shown, the perspective piece 23 is connected to the side surface of the adhesive piece 22 away from the main body 1;The test paper 21 and the perspective piece 23 are arranged on the two side surfaces of the adhesive piece 22;The test paper 21 is arranged inside the liquid injection through hole 11;And the diameter of the perspective piece 23 is equal to the outer diameter D4 of the adhesive piece 22. That is, the electrolyte display component 2 is a perspective piece 23 and test paper 21 from the outside to the inside of the laminated structure (T structure);When the liquid injection through hole 11 appears the phenomenon of liquid leakage, the visual field of the detection personnel can pass through the observation channel 201 to observe the color change of the PH test paper to identify the liquid leakage battery.
[0041] The utility model discloses still a kind of battery, the battery includes cover 100, shell 200 and battery core body 300, the cover 100 is connected to the shell 200;The battery core body 300 is arranged between the cover 100 and the shell 200;And the cover 100 is battery cover plate structure;The specific structure of this battery cover plate structure refers to the above embodiment, since the battery adopts all technical solutions of the above all embodiments, at least has all beneficial effects brought by the technical scheme of the above embodiment, here will not be repeated.
[0042] Among them, the battery core body 300 includes positive pole sheet, negative pole sheet and separator. The positive pole sheet includes positive pole current collector and positive pole active material layer, and the positive pole active material layer is coated on the surface of the positive pole current collector;The positive pole current collector includes a positive pole coating area and a positive pole tab connected to the positive pole coating area, the positive pole coating area is coated with a positive pole active material layer, and the positive pole tab is not coated with a positive pole active material layer. Taking lithium ion battery as an example, the material of the positive pole current collector can be aluminum, the positive pole active material layer includes positive pole active material, and the positive pole active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative pole sheet includes negative pole current collector and negative pole active material layer, and the negative pole active material layer is coated on the surface of the negative pole current collector;The negative pole current collector includes a negative pole coating area and a negative pole tab connected to the negative pole coating area, the negative pole coating area is coated with a negative pole active material layer, and the negative pole tab is not coated with a negative pole active material layer. The material of the negative pole current collector can be copper, the negative pole active material layer includes negative pole active material, and the negative pole active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene) or the like.
[0043] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described only for the sake of clarity, and those skilled in the art should understand the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.
[0044] Based on the disclosure and teaching of the above description, those skilled in the art of the present application can also change and modify the above embodiments. Therefore, the present application is not limited to the above specific embodiments, and any obvious improvements, replacements or modifications made by those skilled in the art on the basis of the present application shall fall within the protection scope of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.
Claims
1. A battery cover plate structure, characterized by: The device includes a main body and an electrolyte display component; the main body has an injection hole; the injection hole extends through the thickness of the main body; the electrolyte display component is disposed at the injection hole; the electrolyte display component has an observation channel; the observation channel communicates with the injection hole; and the projection of the electrolyte display component toward the injection hole covers the injection hole.
2. The battery cover plate structure of claim 1, wherein: The battery cover structure also includes an adhesive component; the electrolyte display component is connected to the adhesive component; Furthermore, the adhesive is connected to the main body at the injection hole; the observation channel is formed between the adhesive and the main body.
3. The battery cover plate structure of claim 2, wherein: The electrolyte display component includes a test strip; the test strip is disposed at the electrolyte injection through-hole.
4. The battery cover plate structure of claim 3, wherein: The relationship between the thickness H2 of the test paper and the thickness H1 of the main body satisfies: H2≤H1.
5. The battery cover plate structure of claim 3, wherein: The adhesive is connected to the inner surface of the main body and is disposed at the opening inside the injection hole; the test paper and the main body are respectively disposed at the two ends of the adhesive; and the projection of the test paper toward the injection hole covers the injection hole.
6. The battery cover plate structure of claim 3, wherein: The adhesive is connected to the outer surface of the main body and is disposed at the opening outside the liquid injection hole; the test paper is disposed inside the liquid injection hole; and the relationship between the outer diameter D4 of the adhesive, the inner diameter D3 of the adhesive, the diameter D2 of the test paper and the inner diameter D1 of the liquid injection hole satisfies: D4>D1≥D2>D3.
7. The battery cover plate structure according to claim 2 or 3, characterized by: The electrolyte display component includes a transparent element; the transparent element is connected to the adhesive element; Furthermore, the projection of the transparent element toward the injection hole covers the injection hole.
8. The battery cover plate structure of claim 7, wherein: The transparent element and the main body are respectively disposed on both sides of the adhesive; the transparent element is disposed on the inner side of the main body; and the projection of the transparent element toward the injection hole covers the injection hole.
9. The battery cover plate structure of claim 7, wherein: When the electrolyte display component is composed of a transparent element and a test strip, the transparent element is connected to the surface of the adhesive member away from the main body; the test strip and the transparent element are disposed opposite to each other on the two sides of the adhesive member; the test strip is disposed inside the electrolyte injection hole.
10. A battery, characterized by: The battery includes a cover, a housing, and a battery cell body, wherein the cover is connected to the housing; the battery cell body is disposed between the cover and the housing; and the cover is a battery cover structure as described in any one of claims 1 to 9.