CN119965501B - Battery Cells and Battery Packs - Google Patents
Battery Cells and Battery Packs Download PDFInfo
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- CN119965501B CN119965501B CN202510450839.3A CN202510450839A CN119965501B CN 119965501 B CN119965501 B CN 119965501B CN 202510450839 A CN202510450839 A CN 202510450839A CN 119965501 B CN119965501 B CN 119965501B
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- injection hole
- battery cell
- liquid injection
- pole
- electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of batteries, in particular to a battery cell and a battery pack. The battery cell comprises a pole group, a first liquid injection hole, a second liquid injection hole, a protruding sinking platform, a connecting piece, an adhesive piece and a battery cell, wherein the pole group is provided with a pole lug, the cover plate main body is provided with the first liquid injection hole, the insulating piece is provided with the second liquid injection hole, the side, facing away from the cover plate main body, of the insulating piece is provided with the protruding sinking platform, the sinking platform is of an annular structure with a notch, the notch and the inner wall of the annular structure enclose a third liquid injection hole, electrolyte is sequentially injected into the battery cell through the first liquid injection hole, the second liquid injection hole and the third liquid injection hole, the connecting piece is connected with the pole lug and the pole post, and the adhesive piece is arranged between the connecting piece and the insulating piece. The invention is provided with the sinking platform structure with the notch so as to form a space for the electrolyte to smoothly flow in the battery cell, thereby realizing quick liquid injection and vacuum pumping without the situation of electrolyte liquid discharge and improving the production efficiency of the battery cell.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery cell and a battery pack.
Background
With the increasing maturity of lithium ion battery technology, the lithium ion battery is widely applied to the electric automobile and the energy storage field as a power battery, and the requirements on the usability and the safety of the lithium ion battery are increasing. The lithium battery top cover is used as a fitting in a lithium ion battery, and firstly, the lithium battery top cover is welded with the aluminum shell to isolate the internal environment from the external environment to play a sealing role, and secondly, the lithium battery top cover is connected with an internal circuit to convey the internal current of the battery to the outside through a top cover pole to play a role in guiding flow.
The traditional top cover is generally mainly composed of a light aluminum sheet, positive and negative electrode posts, upper plastic, lower plastic, an explosion-proof valve and an explosion-proof valve protection film. In the production process of the battery cell, after the cover plate is welded and sealed with the shell, electrolyte is injected into the battery cell through the electrolyte injection hole, and meanwhile, the inside of the battery cell is vacuumized through the electrolyte injection hole, so that gas is discharged, and the electrolyte injection amount in the battery cell is ensured. At present, the liquid injection hole is arranged on the top cover, and for the traditional battery cell, the connecting sheet and the electrode lug are positioned below the liquid injection hole, so as to avoid the slag of welding and printing of the connecting sheet and the electrode lug and the lap joint short circuit of the electrode lug and the shell, and high-temperature resistant adhesive tapes are stuck on the connecting sheet and the electrode lug. When the electrolyte is injected, the adhesive tape is arranged below the electrolyte injection hole, so that the speed of the electrolyte injection is reduced, the production efficiency is affected, and the situation that the electrolyte is discharged to cause the pollution of the battery cell can also occur. In addition, when electrolyte is injected through the injection hole and the inside of the battery cell is vacuumized, the adhesive tape can block the injection hole, so that the production line is alarmed.
Disclosure of Invention
Therefore, the application aims to provide a battery cell and a battery pack, which are used for solving the problems that the liquid injection speed is low, the production efficiency is affected and the pollution of the battery cell is caused by the phenomenon of the discharge of electrolyte when the conventional battery cell is injected with liquid.
The first aspect of the present invention provides a battery cell, wherein the battery cell includes:
The electrode group is provided with protruding electrode lugs;
the cover plate main body is provided with a first liquid injection hole, and the electrode group is arranged on one side of the cover plate main body facing the inside of the battery cell;
a pole mounted to the cap body;
The insulating piece is arranged on one side of the cover plate main body facing the inside of the battery cell, a second liquid injection hole is formed in the insulating piece, a protruding sinking table is formed on one side of the insulating piece facing away from the cover plate main body, the sinking table is formed into an annular structure with a notch, and a third liquid injection hole is formed by surrounding the notch and the inner wall of the annular structure;
the connecting piece is connected with the pole lug and the pole post;
and an adhesive member disposed between the connection member and the insulating member.
Preferably, the radial dimension of the first liquid injection hole is phi D, and phi D is more than or equal to 2mm and less than or equal to 5mm.
Preferably, the radial dimension of the second liquid injection hole is phi E, phi E is more than or equal to 2.5mm and less than or equal to 10mm, phi E/phi D is more than or equal to 1.25 and less than or equal to 10, and the axis of the first liquid injection hole and the axis of the second liquid injection hole are coincident.
Preferably, in the first direction, a distance between one end of the sinking platform, where the notch is arranged, and a hole wall of the second liquid injection hole is f, and a dimension of the sinking platform in the axial direction of the third liquid injection hole is a;
phi E/3≤f≤E.times.3/4, 0.3 mm≤a≤10 mm, and/or 0.1≤a/f≤10.
Preferably, in the axial direction of the first liquid injection hole, the minimum distance between the first liquid injection hole and the second liquid injection hole is c, and c is more than or equal to 0.1mm.
Preferably, the connecting piece is arranged at the side of the sinking platform, and the lug and the pole are arranged at two opposite sides of the connecting piece;
and/or, in the axial direction of the first liquid injection hole, the distance between one side of the sinking table surface facing the inside of the battery cell and the electrode lug is g, and g is more than or equal to 0.1mm.
Preferably, the sinking platform and the connecting piece are arranged at intervals, and the minimum distance between the outer wall of the sinking platform, which surrounds the axial direction of the third liquid injection hole, and the connecting piece is b, wherein b is more than or equal to 0.3mm.
Preferably, the depth of the second liquid injection hole is d, and d is more than or equal to 0.3mm and less than or equal to 10mm.
Preferably, the third liquid injection hole is arranged right below the second liquid injection hole, and the inner wall of the sinking platform is coplanar with the hole wall of the second liquid injection hole.
The second aspect of the invention provides a battery pack, which comprises the battery cell according to any one of the above technical schemes.
Compared with the prior art, the invention has the beneficial effects that:
the battery cell is characterized in that a first liquid injection hole is formed in a cover plate main body, a second liquid injection hole is formed in an insulating piece, a protruding sinking table is formed on one side of the insulating piece, which faces away from the cover plate main body, the sinking table is formed into an annular structure with a notch, the notch and the inner wall of the annular structure enclose a third liquid injection hole, electrolyte is sequentially injected into the battery cell through the first liquid injection hole, the second liquid injection hole and the third liquid injection hole, and due to the fact that the sinking table structure with the notch is arranged to form a space for the electrolyte to smoothly flow in the battery cell, the injection flow rate of the electrolyte is ensured, the situation that the third liquid injection hole is blocked by an adhesive piece during vacuumizing, and production line stopping is caused is avoided, so that the situation that electrolyte is overflowed is avoided while quick liquid injection and vacuumizing is realized, and the production efficiency of the battery cell is improved.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is an enlarged schematic view of the structure shown at K in FIG. 3;
FIG. 5 is a schematic illustration of the dimensions of the components of FIG. 4 and the sizing locations between the components;
fig. 6 is a schematic structural diagram of a cover plate assembly in a battery cell according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of the structure at M in FIG. 6;
fig. 8 is a schematic structural diagram of an insulating member in a battery cell according to an embodiment of the present invention.
The icons comprise 10-electrode groups, 11-electrode lugs, 21-cover plate main bodies, 211-first liquid injection holes, 22-insulating parts, 221-second liquid injection holes, 222-sinking tables, 2221-notches, 2222-third liquid injection holes, 23-electrode posts, 30-connecting parts, 40-pasting parts, 50-shells and D1-first directions.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but rather, obvious variations may be made upon an understanding of the present disclosure, other than operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after understanding the present disclosure.
In the entire specification, when an element (such as a layer, region or substrate) is described as being "on", "connected to", "bonded to", "over" or "covering" another element, it may be directly "on", "connected to", "bonded to", "over" or "covering" another element or there may be one or more other elements interposed therebetween. In contrast, when an element is referred to as being "directly on," directly connected to, "or" directly coupled to, "another element, directly on," or "directly covering" the other element, there may be no other element intervening therebetween.
As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.
Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in examples described herein could also be termed a second member, component, region, layer or section without departing from the teachings of the examples.
For ease of description, spatial relationship terms such as "above," "upper," "below," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element. Thus, the term "above" includes both "above" and "below" depending on the spatial orientation of the device. The device may also be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.
Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.
The features of the examples described herein may be combined in various ways that will be apparent upon an understanding of the present disclosure. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure.
According to a first aspect of the present invention, there is provided a battery cell, which specifically includes a pole group 10, a cap body 21, a pole 23, an insulating member 22, a connecting member 30, and an adhesive member 40.
Hereinafter, a specific structure of the battery cell according to the present embodiment will be described.
In this embodiment, the cover main body 21 is provided with a first liquid injection hole 211, the pole group 10 and the insulator 22 are both disposed on one side of the cover main body 21 facing the inside of the battery cell, and the pole post 23 is mounted on the cover main body 21. The insulating member 22 is provided with a second liquid injection hole 221, a protruding sinking platform 222 is formed on one side, facing away from the cover plate main body 21, of the insulating member 22, the sinking platform 222 is formed into an annular structure with a notch 2221, and the notch 2221 and the inner wall of the annular structure enclose a third liquid injection hole 2222, so that electrolyte can be injected into the battery cell through the first liquid injection hole 211, the second liquid injection hole 221 and the third liquid injection hole 2222 in sequence.
As shown in fig. 2 and 4, the connection member 30 is formed in a sheet structure for connecting the tab 11 and the pole 23, i.e., the tab 11 and the pole 23 are welded to the connection member 30, respectively, the adhesive member 40 is disposed between the connection member 30 and the insulating member 22, the adhesive member 40 may be a high temperature resistant adhesive tape, and the adhesive member 40 is attached to one side of the connection member 30 facing the insulating member 22 and a part of the pole group 10.
Because the setting has the heavy platform 222 structure of breach 2221 in order to form the space that supplies electrolyte to flow in smoothly in the electric core inside, guarantee electrolyte injection velocity of flow, paste piece 40 when also can avoiding the evacuation and annotate the shutoff of liquid hole 2222 with the third, lead to the condition of production stop line to can not appear the electrolyte condition of overflowing when realizing annotating liquid fast and evacuating yet, improve the production efficiency of electric core.
In this embodiment, the axial direction of the first injection hole 211, the axial direction of the second injection hole 221 and the axial direction of the third injection hole 2222 are the same, and preferably, the first injection hole 211, the second injection hole 221 and the third injection hole 2222 are coaxially arranged, so that the electrolyte can smoothly flow into the cell.
Specifically, in the present embodiment, as shown in fig. 2 and 3, the pole group 10 is provided inside the case 50, the pole group 10 is formed by stacking or winding pole pieces, and the side of the pole group 10 has protruding tabs 11. The cover assembly includes a cover body 21, an insulating member 22 and a pole 23, the cover body 21 is formed in a plate-shaped structure, the shape of the cover body 21 is adapted to the shape of the housing 50, for example, when the housing 50 is a rectangular shell-shaped structure, the cover body 21 is a rectangular plate-shaped structure, and when the housing 50 is cylindrical, the cover body 21 is a circular plate-shaped structure.
In a preferred embodiment, as shown in fig. 2 and 3, the pole 23 is assembled on the cover main body 21, the first injection hole is formed on the cover main body 21, two ends of the pole 23 in the axial direction extend out of two sides of the cover main body 21 in the thickness direction, and the insulating member 22 is disposed on one side of the cover main body 21 facing the inside of the battery cell, so as to separate the cover main body 21 and the housing 50 from the pole 23 and the pole group 10, thereby playing an insulating protection role and reducing the risk of short circuit.
In the present embodiment, the housing 50 and the cover main body 21 are made of metal, such as aluminum or steel, and the insulating member 22 is made of plastic, such as PP.
Further, in the preferred embodiment, as shown in fig. 1 to 4 and fig. 6 to 8, the first liquid injection hole 211 is opened on the cover main body 21, the first liquid injection hole 211 is a through hole structure penetrating through the thickness direction of the cover main body 21, the insulating first liquid injection hole 211 is communicated with the second liquid injection hole 221, the second liquid injection hole 221 is a through hole structure penetrating through the thickness direction of the insulating member 22, the sinking platform 222 is formed by protruding outwards from one side of the insulating member 22, which is opposite to the cover main body 21, the adhesive member 40 and the sinking platform are arranged at intervals in the thickness direction of the cover main body 21, so that after the assembly of the electric core is completed, the electrolyte flows to the second liquid injection hole 221 through the first liquid injection hole 211 and then flows to the inside of the electric core through the notch 2221 of the sinking platform 222, and even if the adhesive member 40 moves in the direction close to the sinking platform 222 under the action of vacuum suction force, the smoothness of the electrolyte injection efficiency and the production efficiency of the electric core can be improved due to the non-closed annular structure with the notch 2221, and the third liquid injection hole 2222 is not completely blocked when the vacuum is pumped.
In a preferred embodiment, as shown in fig. 6 to 8, the sinking stage 222 has a semicircular ring structure, so that the flow rate of the electrolyte injected into the cell can be increased while effectively separating the second injection hole 221 and the adhesive member 40, thereby improving the production efficiency of the cell.
Further, in a preferred embodiment, as shown in fig. 6 to 8, the third liquid injection hole 2222 is disposed directly below one side of the second liquid injection hole 221 facing away from the first liquid injection hole 211, and the inner wall of the ring-shaped sinking platform 222 is coplanar with the hole wall of the second liquid injection hole 221, so that the sinking platform 222 has a certain electrolyte guiding function, and the rate of the electrolyte entering the inside of the electric core is improved.
In this embodiment, as shown in fig. 5, the radial dimension of the first liquid injection hole 211 is phid, where phid is 2mm less than or equal to phid less than or equal to 5mm, and phid is preferably 3mm, so that the liquid injection and the vacuum pumping are smooth, the liquid injection efficiency is improved, and the production efficiency of the battery cell is improved.
Further, in this embodiment, as shown in fig. 5, the axis of the first liquid injection hole 211 and the axis of the second liquid injection hole 221 are coincident, so that the radial dimension of the second liquid injection hole 221 is greater than that of the first liquid injection hole 211, ensuring that the flow rate of the electrolyte can smoothly enter the inside of the casing 50, and avoiding the situation of electrolyte overflow. Preferably, the radial dimension of the second liquid injection hole 221 is phi E, phi E is less than or equal to 2.5mm and less than or equal to 10mm, phi E/phi D is less than or equal to 1.25 and less than or equal to 10, so that the insulating protection performance of the insulating piece 22 on the cover plate main body 21 is ensured, and the installation of the sealing plug after liquid injection is finished is convenient. The sealing plug is a rubber plug capable of sealing the second injection hole 221 after the injection is completed and avoiding leakage of the electrolyte.
Further, in this embodiment, as shown in fig. 5, in the first direction D1, the distance between the end of the sinking platform 222 with the notch and the wall of the second liquid injection hole 221 is f, Φe/3 is less than or equal to f is less than or equal to Φex3/4, so that a sufficient and effective communication volume is provided between the second liquid injection hole 221 and the inside of the battery cell to ensure the flow rate of the injected electrolyte, and the situation of liquid leakage can not occur while liquid injection and vacuum pumping are fast. The first direction D1 may be the thickness direction of the battery cell or the width direction of the cover main body 21.
In this embodiment, as shown in fig. 5, the dimension of the sinking platform 222 in the axial direction of the third filling hole 2222 is a, that is, the dimension of the sinking platform 222 in the thickness direction of the cover plate main body 21 is a,0.3mm is less than or equal to a is less than or equal to 10mm, preferably 0.1 is less than or equal to a/f is less than or equal to 10, so that a sufficient distance is ensured between the second filling hole 221 and the adhesive member 40, the filling of electrolyte is ensured to be smooth, the filling rate is accelerated, the electrolyte is prevented from overflowing, the production efficiency of the battery core is improved, and the risk that the adhesive member 40 blocks the third filling hole 2222 during vacuumizing is reduced, thereby ensuring smooth production.
In the present embodiment, as shown in fig. 5, the minimum distance between the first liquid injection hole 211 and the second liquid injection hole 221 in the axial direction of the first liquid injection hole 211, i.e., in the thickness direction of the cover plate main body 21, is c, i.e., the distance between the end faces of the first liquid injection hole 211 and the second liquid injection hole 221 opposite to each other in the thickness direction of the cover plate main body 21 is c≥0.1 mm, so that an assembly gap is formed between the first liquid injection hole 211 and the second liquid injection hole 221, avoiding the interference between the first liquid injection hole 211 and the second liquid injection hole 221, thereby ensuring the shape accuracy of the second liquid injection hole 221 and ensuring the flow rate of the injected electrolyte.
In the present embodiment, as shown in fig. 3 and 4, the connection member 30 is provided on the side of the counter plate 222, and the tab 11 and the post 23 are provided on the opposite sides of the connection member 30 from each other, specifically, the tab 11 and the post 23 are connected to the opposite sides of the connection member 30 in the thickness direction, respectively.
In this embodiment, as shown in fig. 5, in the axial direction of the first liquid injection hole 211, that is, in the thickness direction of the cover plate main body 21, the distance between the tab 11 and the side of the counter 222 facing the inside of the battery cell is g, where g is greater than or equal to 0.1mm, so that interference between the counter 222 and the tab 11 is avoided, and deformation of the counter 222 or abrasion of the tab 11 is prevented.
In this embodiment, as shown in fig. 5, the sinking platform 222 and the connecting piece 30 are arranged at intervals, the minimum distance between the outer wall of the sinking platform 222 in the axial direction around the third liquid injection hole 2222 and the connecting piece 30 is b, and b is greater than or equal to 0.3mm, so that interference between the sinking platform 222 and the connecting piece 30 is avoided, deformation of the sinking platform 222 is prevented, and the flow rate of electrolyte is influenced.
In this embodiment, as shown in fig. 5, the depth of the second liquid injection hole 221 is d, and d is greater than or equal to 0.3mm and less than or equal to 10mm, so that the structural strength of the second liquid injection hole 221 is ensured, the damage caused by the impact of the electrolyte is reduced, and the second liquid injection hole 221 can be prevented from occupying the space inside the battery cell to reduce the energy density of the battery cell.
Production line production test was performed for cells having different dimensions phid, phi E, a and f, see table 1 below.
TABLE 1
Note that failure mode "/" in the table indicates that the cell is normally produced, and no conditions of difficult installation of a sealing plug, abnormal vacuum pumping or difficult liquid injection exist.
Referring to table 1, it is understood that, in examples 1 to 6, phid, phi E, a, f, a/f and phie/phid are all within the defined ranges, the difficulty in installing the sealing plug, the abnormality in evacuating or the difficulty in injecting the liquid does not occur during the production line of the battery cell, whereas the difficulty in installing the sealing plug occurs mainly due to the too small parameter of phie/phid in comparative example 1, the clogging at the time of evacuating the battery cell occurs in comparative example 2, the abnormality in evacuating occurs mainly due to the too large size of a, the difficulty in injecting the liquid occurs mainly due to the too small size of a/f in comparative example 3, the difficulty in injecting the liquid occurs mainly due to the too small size of f in comparative example 4, the difficulty in injecting the liquid occurs mainly due to the too large size of f in comparative example 5, and the risk of clogging the third liquid injecting hole 2 by the adhesive member 40 at the time of evacuating due to the too large size of f in the case of the size of a is a set value.
According to the battery cell, the first liquid injection hole is formed in the cover plate main body, the second liquid injection hole is formed in the insulating piece, the protruding sinking platform is formed on one side, facing away from the cover plate main body, of the insulating piece, the sinking platform is formed into an annular structure with a notch, the notch and the inner wall of the annular structure enclose the third liquid injection hole, electrolyte is sequentially injected into the battery cell through the first liquid injection hole, the second liquid injection hole and the third liquid injection hole, and due to the fact that the sinking platform structure with the notch is arranged to form a space for the electrolyte to smoothly flow in the battery cell, the injection flow rate of the electrolyte is guaranteed, the phenomenon that the third liquid injection hole is blocked by the adhesive piece during vacuumizing, and production line stopping is caused can be avoided, so that the situation that electrolyte is overflowed when quick liquid injection and vacuumizing are achieved is avoided, and the production efficiency of the battery cell is improved.
According to the battery pack, the battery pack comprises at least one battery cell, when the battery cells are arranged in a plurality of mode, at least part of the battery cells are connected in series and/or in parallel, and the production efficiency and the performance of each battery cell can be guaranteed, so that the production efficiency and the safety of the battery pack are effectively improved.
It should be noted that the foregoing embodiments are merely illustrative embodiments of the present application, and not restrictive, and the scope of the application is not limited to the embodiments, and although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any modification, variation or substitution of some of the technical features of the embodiments described in the foregoing embodiments may be easily contemplated within the scope of the present application, and the spirit and scope of the technical solutions of the embodiments do not depart from the spirit and scope of the embodiments of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
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| CN115579597A (en) * | 2022-11-11 | 2023-01-06 | 深圳海润新能源科技有限公司 | Energy storage device and electrical equipment |
| CN117254175A (en) * | 2023-10-31 | 2023-12-19 | 深圳埃克森新能源科技有限公司 | Terminal structure for preventing electrolyte from leaking out, lithium battery and liquid injection method of lithium battery |
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| CN208862085U (en) * | 2018-05-14 | 2019-05-14 | 东莞塔菲尔新能源科技有限公司 | A kind of power battery top cover electrolyte filling hole structure |
| CN211404538U (en) * | 2020-03-30 | 2020-09-01 | 珠海冠宇电池股份有限公司 | Button cell casing components, button cells and electronic products |
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| CN115579597A (en) * | 2022-11-11 | 2023-01-06 | 深圳海润新能源科技有限公司 | Energy storage device and electrical equipment |
| CN117254175A (en) * | 2023-10-31 | 2023-12-19 | 深圳埃克森新能源科技有限公司 | Terminal structure for preventing electrolyte from leaking out, lithium battery and liquid injection method of lithium battery |
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