Battery cell and electric device
By directly connecting the tabs and cover plate assembly in the battery cell, the adapters and plastic parts are eliminated, solving the material cost and energy density problems in traditional battery cells, and improving battery performance while saving costs and space.
Patent Information
- Application Number
- CN202423150027.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In traditional battery cells, the inclusion of adapter blocks and plastic parts increases material costs and reduces battery energy density, while also occupying internal space in the casing.
The positive electrode cover plate assembly is directly electrically connected to the positive electrode tab, and the negative electrode cover plate assembly is directly electrically connected to the negative electrode tab. The electrode post is wrapped by a cover plate assembly formed by splicing at least two plates, eliminating the need for adapters and plastic parts, thus achieving sealing and insulation.
It saves material costs, saves internal space in the casing, increases battery energy density, and accelerates the heating or cooling capacity of the battery cell, while ensuring the sealing effect between the terminals and the cover plate.
Smart Images
Figure CN223693335U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery monomer and electric device. BACKGROUND
[0002] With the rapid expansion and development of new energy market, the market share of new energy vehicles gradually increases, therefore, as the core component of new energy vehicles - power battery, the application in people's life is increasingly widespread.
[0003] The power battery usually includes a plurality of battery monomers in series, parallel or mixed connection, the battery monomer in the traditional technology, one end of the battery cell is provided with a positive tab, the other end is provided with a negative tab, the top cover is provided with a positive column and a negative column, and the positive column and the negative column are electrically connected with the positive tab and the negative tab respectively.
[0004] In order to lead the positive tab and the negative tab to the pole column (including the positive column and the negative column) located at the same top cover, it is necessary to set a longer adapter block, and at the same time, in order to fix the adapter block and realize the insulation of the adapter block and the shell, it is also necessary to set a plastic part. The setting of the adapter block and the plastic part not only will lead to the increase of material cost, but also will occupy the space inside the shell, causing the decrease of battery energy density. SUMMARY
[0005] Therefore, it is necessary to provide a battery monomer and electric device capable of improving the above problems.
[0006] In one aspect, the application provides a battery monomer, comprising:
[0007] a shell;
[0008] a battery cell arranged in the shell, one end of the battery cell having a positive tab, and the other end having a negative tab;
[0009] a positive cover plate assembly and a negative cover plate assembly, the positive cover plate assembly being connected to one end of the shell and being electrically connected to the positive tab located at the same end, and the negative cover plate assembly being connected to the other end of the shell and being electrically connected to the negative tab located at the same end;
[0010] wherein at least one of the positive cover plate assembly and the negative cover plate assembly comprises a first cover plate and a pole column, the first cover plate being formed by splicing at least two plate bodies, the first cover plate having a splicing hole in the shape of a ring, and the pole column being sealingly arranged in the splicing hole.
[0011] In one embodiment, the first cover plate is formed by splicing two plate bodies.
[0012] In one of the embodiments, an annular groove is arranged on the hole wall of the splicing hole, and an annular protrusion is arranged on the pole, the annular protrusion being embedded in the annular groove.
[0013] In one of the embodiments, at least one of the positive cover plate assembly and the negative cover plate assembly further comprises a sealing ring, the sealing ring being arranged in the splicing hole and being sealed between the first cover plate and the pole.
[0014] In one of the embodiments, at least one of the positive cover plate assembly and the negative cover plate assembly further comprises an insulating piece, the insulating piece being arranged between the pole and the shell.
[0015] In one of the embodiments, the pole comprises a first pole body and a second pole body connected to each other, the first pole body being electrically connected to the tab, and the second pole body being arranged in the splicing hole in a sealed manner.
[0016] The insulating piece comprises a first insulating part and a second insulating part connected to each other, the first insulating part being arranged between the first pole body and the first cover plate, and the second insulating part being arranged in the shell and surrounding the first pole body.
[0017] In one of the embodiments, the negative cover plate assembly comprises the first cover plate and the pole, the first cover plate being formed by splicing at least two plate bodies, the first cover plate having a splicing hole in an annular shape, and the pole being arranged in the splicing hole in a sealed manner.
[0018] The positive cover plate assembly and the shell jointly serve as a positive electrode of the battery cell.
[0019] In one of the embodiments, the positive cover plate assembly comprises a second cover plate, and the second cover plate is integrally formed with an explosion-proof valve.
[0020] In one of the embodiments, the shell is wrapped with a protective layer, and the protective layer is a paint layer.
[0021] In another aspect, the application further provides a power utilization device comprising the battery cell as described above.
[0022] Compared with the prior art, the application has the following beneficial effects:
[0023] Because the positive electrode cover assembly is directly electrically connected to the positive electrode tab at the same end, and the negative electrode cover assembly is directly electrically connected to the negative electrode tab at the same end, compared to the existing technology where both the positive and negative electrodes are located on the same top cover, there is no need for adapters to achieve electrical connection between the positive and negative electrode tabs and the positive and negative electrodes. Since no adapter is needed, the plastic insulation between the adapter and the casing is also eliminated, saving material costs and internal space, thus increasing the battery's energy density. Because the first cover is formed by splicing at least two plates, during assembly, multiple plates are spliced together to form splicing holes, circumferentially wrapping the electrode post. This facilitates assembly between the first cover and the electrode post while ensuring a tight seal between them. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 An exploded view of a battery cell provided in a preferred embodiment of this application;
[0026] Figure 2 for Figure 1 The diagram shows a structural view of a single battery cell from another perspective.
[0027] Figure 3 for Figure 1 An exploded view of the negative electrode cover assembly of the battery cell shown.
[0028] Figure 4 for Figure 3 Another structural view of the negative electrode cover assembly shown in the diagram;
[0029] Figure 5 for Figure 3 Another structural view of the negative electrode cover assembly shown ( Figure 5 (Multiple panels are spliced together to form the first cover plate);
[0030] Figure 6 for Figure 1 The diagram shows the structure of a battery cell.
[0031] Figure 7 for Figure 3 Assembly diagram of the negative electrode cover plate assembly shown;
[0032] Figure 8 for Figure 7A cross-sectional view of the negative cover plate assembly shown in FIG.
[0033] Figure 9 For Figure 8 An enlarged view of A of the negative cover plate assembly shown in FIG.
[0034] BRIEF DESCRIPTION OF DRAWINGS
[0035] 100, battery monomer; 10, shell; 20, electric core; 21, positive tab; 22, negative tab; 30, negative cover plate assembly; 31, first cover plate; 311, plate body; 312, splicing hole; 313, annular groove; 32, pole; 321, annular protrusion; 322, first column body; 323, second column body; 324, liquid injection hole; 33, sealing ring; 34, insulating piece; 341, first insulating part; 342, second insulating part; 40, positive cover plate assembly; 41, second cover plate; 42, explosion-proof valve. DETAILED DESCRIPTION
[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0037] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0038] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.
[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; 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, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0041] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not the only embodiment.
[0042] Reference Figure 1 and Figure 2An embodiment of the present application provides a battery monomer 100, which comprises a shell 10 and an electric core 20. The shell 10 has openings at two ends, and the electric core 20 is arranged in the shell 10. The electric core 20 has a positive electrode tab 21 at one end and a negative electrode tab 22 at the other end. The battery monomer 100 further comprises a positive electrode cover plate assembly 40 and a negative electrode cover plate assembly 30. The positive electrode cover plate assembly 40 is connected to one end of the shell 10, and the negative electrode cover plate assembly 30 is connected to the other end of the shell 10, so as to seal the openings at the two ends of the shell 10. Meanwhile, the positive electrode cover plate assembly 40 is electrically connected to the positive electrode tab 21 at the same end, and the negative electrode cover plate assembly 30 is electrically connected to the negative electrode tab 22 at the same end. If the openings at the two ends of the shell 10 are defined as a first opening and a second opening respectively, the positive electrode cover plate assembly 40 can seal the first opening when being connected to the shell 10, and is electrically connected to the positive electrode tab 21 at the same end through the first opening. The negative electrode cover plate assembly 30 can seal the second opening when being connected to the shell 10, and is electrically connected to the negative electrode tab 22 at the same end through the second opening.
[0043] Since the positive electrode cover plate assembly 40 is directly electrically connected to the positive electrode tab 21 at the same end, and the negative electrode cover plate assembly 30 is directly electrically connected to the negative electrode tab 22 at the same end, compared with the prior art in which the positive electrode post 32 and the negative electrode post 32 are arranged in the same top cover, no adapter is needed to realize the electrical connection between the positive and negative electrode tabs and the positive and negative electrode posts. Since the adapter is no longer needed, the plastic part used for insulation between the adapter and the shell 10 can also be saved, which not only saves the material cost, but also saves the space inside the shell 10, and improves the energy density of the battery.
[0044] It should be noted that, in the present application, the battery monomer 100 saves the adapter, the positive electrode tab 21 is directly connected to the positive electrode cover plate assembly 40, and the negative electrode tab 22 is directly connected to the negative electrode cover plate assembly 30. The heat transfer does not need to pass through the adapter, but can be directly transferred between the tab and the cover plate assembly, which can accelerate the heating or cooling of the electric core 20, and improve the heating / cooling capacity of the battery monomer 100.
[0045] Further, refer to Figures 3-5At least one of the positive electrode cover assembly 40 and the negative electrode cover assembly 30 includes a first cover plate 31 and an electrode post 32. The first cover plate 31 is formed by splicing at least two plates 311. The first cover plate 31 has an annular splicing hole 312, and the electrode post 32 is sealed and inserted through the splicing hole 312. When the electrode post 32 is a positive electrode post, it is welded to the positive electrode tab 21; when the electrode post 32 is a negative electrode post, it is welded to the negative electrode tab 22. Since the first cover plate 31 is formed by splicing at least two plates 311, during assembly, multiple plates 311 are spliced together to form the splicing hole 312, which circumferentially wraps around the electrode post 32, facilitating the assembly between the first cover plate 31 and the electrode post 32, while ensuring the sealing effect between the electrode post 32 and the first cover plate 31.
[0046] In some embodiments, the housing 10 is a hollow cuboid structure with openings at both ends, and the positive electrode cover assembly 40 and the negative electrode cover assembly 30 are respectively disposed at both ends along the length of the housing 10. In this case, the battery cell 100 is a prismatic battery. Of course, in other embodiments, the shape of the housing 10 is not limited.
[0047] Optionally, continue reading Figure 1 Both the positive electrode tab 21 and the negative electrode tab 22 are non-full tabs, and can be positioned in the width direction of the battery cell 100. Figure 1 In the X-direction, the upper tab occupies 70% of the width of the cell 20, leaving the remaining area of the cell 20 for electrolyte filling and explosion protection. In this application, the electrolyte filling hole 324 can be formed on the terminal post 32 or the cover plate, without limitation. The terminal post 32 can be positioned in the width direction of the first cover plate 31 (the width direction of the first cover plate 31 is the width direction of the battery cell 100) with a proportion of 80% to facilitate the formation of the electrolyte filling hole 324 on the terminal post 32.
[0048] Both the positive electrode tab 21 and the negative electrode tab 22 are connected to the corresponding cover plate assembly by welding, such as by laser or ultrasonic welding, to ensure a secure connection. (See also...) Figure 6 Both the positive electrode tab 21 and the negative electrode tab 22 can be bent. During welding, the positive electrode tab 21 is first welded to the positive electrode cover plate assembly 40, and the negative electrode tab 22 is welded to the negative electrode cover plate assembly 30. Both the positive electrode tab 21 and the negative electrode tab 22 are bent at 90°. Figure 6 After bending the positive electrode tab 21 and the negative electrode tab 22 by 90°, the positive electrode cover plate assembly 40 and the negative electrode cover plate assembly 30 are welded to the housing 10.
[0049] In some embodiments, see further reference. Figure 4The first cover plate 31 is formed by splicing two plate bodies 311. In this way, the structure of the first cover plate 31 is simple, and the assembly speed is accelerated. Alternatively, when the first cover plate 31 is formed by splicing two plate bodies 311, the shape of each plate body 311 can be set as a U-shaped type, and the openings of the U-shaped types are spliced with each other to form the first cover plate 31.
[0050] It is conceivable that in some other embodiments, the first cover plate 31 can also be formed by splicing three, four or more than four plate bodies 311, which is not limited herein.
[0051] In some embodiments, continuing to refer to Figure 5 The hole wall of the splicing hole 312 is provided with an annular groove 313, and the pole 32 is provided with an annular protrusion 321, which is embedded in the annular groove 313. Alternatively, each plate body 311 is provided with a sub-groove, and when each plate body 311 is spliced together, the sub-grooves are connected to form the above-mentioned annular groove 313. In this way, the annular protrusion 321 on the pole 32 can be embedded in the annular groove 313 on the first cover plate 31, so that the pole 32 can be prevented from being pulled out of the first cover plate 31, and the fixing effect is ensured.
[0052] Further, at least one of the positive cover plate assembly 40 and the negative cover plate assembly 30 further comprises a sealing ring 33, which is arranged in the annular groove 313 of the splicing hole 312 and is sealingly arranged between the first cover plate 31 and the pole 32. Since the sealing ring 33 is sealingly arranged between the pole 32 and the first cover plate 31, the sealing effect is ensured, and the leakage of electrolyte from between the pole 32 and the first cover plate 31 is avoided. At the same time, the sealing ring 33 is made of insulating material to realize the insulation between the pole 32 and the first cover plate 31.
[0053] Alternatively, in order to ensure the fixing effect, referring to Figures 7-9 The sealing ring 33 is provided with an embedding groove 331, and the sealing ring 33 is at least partially accommodated into the annular groove 313, and the annular protrusion 321 of the pole 32 is embedded into the embedding groove 331 of the sealing ring 33. Of course, in some other embodiments, the embedding groove 331 can be omitted on the sealing ring 33, and at this time the annular protrusion 321 directly contacts the inner circumferential surface of the sealing ring 33.
[0054] The plate bodies 311 can be fixed by welding, such as laser welding of the first cover plate 31 by two half-aluminum plate bodies 311. Alternatively, after laser welding, the compression amount of the sealing ring 33 can be 30% to achieve better fixing and sealing effect.
[0055] In some embodiments, continuing to refer to Figure 8 and Figure 9At least one of the positive cover plate assembly 40 and the negative cover plate assembly 30 further comprises an insulating piece 34, which is arranged between the pole 32 and the shell 10 in an insulating manner. By arranging the insulating piece 34, the insulating effect between the pole 32 and the shell 10 can be ensured, and the pole 32 is prevented from contacting the shell 10, thereby avoiding short circuit.
[0056] Further, referring to Figure 4 , the pole 32 comprises a first pole body 322 and a second pole body 323 connected to each other, the first pole body 322 is electrically connected to the tab, and the second pole body 323 is arranged in the sealing manner in the splicing hole 312, and the annular protrusion 321 is arranged on the second pole body 323. Referring to Figure 9 , the insulating piece 34 comprises a first insulating part 341 and a second insulating part 342 connected to each other, the first insulating part 341 is arranged between the first pole body 322 and the first cover plate 31, and the second insulating part 342 is arranged in the shell 10 and surrounds the first pole body 322. In this way, the insulating effect between the pole 32, the shell 10 and the first cover plate 31 can be ensured.
[0057] In some embodiments, the first pole body 322 is made of copper, the second pole body 323 is made of aluminum, and the shell 10 is made of aluminum. It is conceivable that in some other embodiments, the materials of the first pole body 322, the second pole body 323 and the shell 10 are not limited.
[0058] In some embodiments, the negative cover plate assembly 30 comprises the first cover plate 31, the pole 32, the sealing ring 33 and the insulating piece 34, the first cover plate 31 is formed by splicing at least two plate bodies 311, the first cover plate 31 has a splicing hole 312 in the annular shape, and the hole wall of the splicing hole 312 is provided with an annular groove 313. The annular protrusion 321 is arranged on the pole 32, and the sealing ring 33 is arranged in a compressed manner between the bottom wall of the annular groove 313 and the annular protrusion 321. The first insulating part 341 of the insulating piece 34 is arranged between the first cover plate 31 and the first pole body 322 in the thickness direction of the first cover plate 31, and the second insulating part 342 is arranged in a bent manner relative to the first insulating part 341 and surrounds the first pole body 322, so as to prevent the first pole body 322 from contacting the shell 10. The positive cover plate assembly 40 and the shell 10 jointly serve as the positive electrode of the battery monomer 100. At this time, by arranging the insulating piece 34, the insulating effect between the pole 32 and the shell 10 can be ensured, and the pole 32 serving as the negative output end is prevented from contacting the shell 10, thereby avoiding short circuit between the positive electrode and the negative electrode.
[0059] It is conceivable that in other embodiments, the negative cover plate assembly 30 can also be provided together with the shell 10 as the negative electrode of the battery monomer 100, and the positive cover plate assembly 40 includes the first cover plate 31, the pole 32, the sealing member and the insulating member 34 described above. Alternatively, the positive cover plate assembly 40 and the negative cover plate assembly 30 are provided to include the first cover plate 31, the pole 32, the sealing member and the insulating member 34 described above.
[0060] In some specific embodiments, with reference to the foregoing Figure 2 When the positive cover plate assembly 40 and the shell 10 are collectively used as the positive electrode of the battery monomer 100, the positive cover plate assembly 40 includes the second cover plate 41, and the explosion-proof valve 42 is integrally formed on the second cover plate 41. Compared with the prior art of welding the explosion-proof valve 42 on the cover plate, the explosion-proof valve 42 is integrally formed on the second cover plate 41, thereby reducing the processing procedure.
[0061] In this application, a region of a suitable size is milled directly on the second cover plate 41 as the explosion-proof valve 42. Specifically, the thickness of the milled region can be 0.2mm, and the residual wall thickness at the cracking guide groove punched in the region is 40um, which is used as the explosion-proof valve 42 in turn. Of course, according to different working conditions, the thickness of the milled region and the residual wall thickness at the guide groove need to be determined according to the valve opening pressure.
[0062] In some embodiments, the shell 10 is provided with a protective layer, which is a paint layer. In this way, the outer film of the battery monomer 100 can be cancelled, and the paint layer is directly formed on the shell 10. The paint layer has excellent properties such as scratch resistance, wear resistance, corrosion resistance, high strength, and the protection performance is obviously better than various protective films. Alternatively, the paint layer is formed by polyurethane and polyurea elastomer.
[0063] It should be noted that after the battery monomer 100 is formed, the central adhesive of the pole 32 of the positive cover plate assembly 40 and the negative cover plate assembly 30 is pasted, the other regions are sprayed with paint to form a protective layer, and then the adhesive tape is torn off to expose the central pole 32 and the second cover plate 41 of the explosion-proof valve 42 for welding the busbar.
[0064] Another embodiment of the present application also provides a battery including the battery monomer 100 described above.
[0065] Another embodiment of the present application also provides a power device including the battery monomer 100 described above.
[0066] Alternatively, the power device is a vehicle, which can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc.
[0067] It is worth noting that for the pure electric vehicle, the above-mentioned battery can be used as a driving power source, thereby replacing fossil fuels to provide driving power.
[0068] In some other embodiments, the type of the electric device is not limited, such as a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, an amusement device, an elevator, and a lifting device, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, or an electric plane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The energy storage device can be an energy storage wall, a base station energy storage, a container energy storage, etc. The amusement device can be a carousel, a jump machine, etc. The present application does not specially limit the above-mentioned electric device.
[0069] The battery monomer 100, the battery, and the electric device provided by the embodiments of the present application have the following beneficial effects:
[0070] 1. Since the positive electrode cover plate assembly 40 is directly electrically connected with the positive electrode tab 21 at the same end, and the negative electrode cover plate assembly 30 is directly electrically connected with the negative electrode tab 22 at the same end, compared with the prior art in which the positive electrode column 32 and the negative electrode column 32 are arranged on the same top cover, no adapter is needed to realize the electrical connection between the positive and negative electrode tabs and the positive and negative electrode columns. Since the adapter is no longer needed, the plastic part used for insulation between the adapter and the shell 10 can also be omitted, which not only saves the material cost, but also saves the space inside the shell 10, and improves the energy density of the battery.
[0071] 2. In the present application, since the adapter is omitted, the positive electrode tab 21 is directly connected with the positive electrode cover plate assembly 40, and the negative electrode tab 22 is directly connected with the negative electrode cover plate assembly 30. The heat transfer does not need to pass through the adapter, but can be directly transferred between the tab and the cover plate assembly, which can accelerate the heating or cooling of the electric core 20, and improve the heating / cooling capacity of the battery monomer 100.
[0072] 3. Since the first cover plate 31 is formed by splicing at least two plate bodies 311, when assembled, the plurality of plate bodies 311 are spliced with each other to form a splicing hole 312, so as to wrap the electrode column 32 in the circumferential direction, which facilitates the assembly between the first cover plate 31 and the electrode column 32, and can ensure the sealing effect between the electrode column 32 and the first cover plate 31.
[0073] 4. The battery monomer 100 is cancelled outside the film, and the paint layer is formed directly on the shell 10, the paint layer has the high quality performance such as scratch resistance, wear resistance, corrosion resistance, high strength, and the protection performance is obviously superior to various protective films.
[0074] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present application.
[0075] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application patent. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.
Claims
1. A battery cell, characterized by, The application relates to a battery cell, which comprises the following components: a shell (10); an electric core (20) arranged in the shell (10), one end of the electric core (20) being provided with a positive electrode tab (21) and the other end being provided with a negative electrode tab (22); a positive electrode cover plate assembly (40) and a negative electrode cover plate assembly (30), the positive electrode cover plate assembly (40) being connected to one end of the shell (10) and being electrically connected to the positive electrode tab (21) at the same end, and the negative electrode cover plate assembly (30) being connected to the other end of the shell (10) and being electrically connected to the negative electrode tab (22) at the same end; wherein at least one of the positive electrode cover plate assembly (40) and the negative electrode cover plate assembly (30) comprises a first cover plate (31) and a pole (32), the first cover plate (31) being formed by splicing at least two plate bodies (311), the first cover plate (31) being provided with a splicing hole (312) in the form of a ring, and the pole (32) being sealingly arranged in the splicing hole (312).
2. The battery cell of claim 1, wherein, The first cover plate (31) is formed by splicing two plate bodies (311).
3. The battery cell of claim 1, wherein, An annular groove (313) is arranged on the hole wall of the splicing hole (312), and an annular protrusion (321) is arranged on the pole (32), the annular protrusion (321) being embedded in the annular groove (313).
4. The battery cell of claim 1, wherein, At least one of the positive electrode cover plate assembly (40) and the negative electrode cover plate assembly (30) further comprises a sealing ring (33), the sealing ring (33) being arranged in the splicing hole (312) and being sealingly arranged between the first cover plate (31) and the pole (32).
5. The battery cell of claim 1, wherein, At least one of the positive electrode cover plate assembly (40) and the negative electrode cover plate assembly (30) further comprises an insulating piece (34), the insulating piece (34) being insulatingly arranged between the pole (32) and the shell (10).
6. The battery cell of claim 5, wherein, The pole (32) comprises a first pole body (322) and a second pole body (323) connected to each other, the first pole body (322) being electrically connected to the tab, and the second pole body (323) being sealingly arranged in the splicing hole (312); The insulating piece (34) comprises a first insulating part (341) and a second insulating part (342) connected to each other, the first insulating part (341) being arranged between the first pole body (322) and the first cover plate (31), and the second insulating part (342) being arranged in the shell (10) and surrounding the first pole body (322) outside.
7. The battery cell of any one of claims 1-6, wherein, The negative electrode cover plate assembly (30) comprises the first cover plate (31) and the pole (32), the first cover plate (31) being formed by splicing at least two plate bodies (311), the first cover plate (31) being provided with a splicing hole (312) in the form of a ring, and the pole (32) being sealingly arranged in the splicing hole (312). The positive electrode cover plate assembly (40) and the shell (10) jointly serve as the positive electrode of the battery cell.
8. The battery cell of claim 7, wherein, The positive electrode cover plate assembly (40) comprises a second cover plate (41), and an anti-explosion valve (42) is integrally formed on the second cover plate (41).
9. The battery cell of any one of claims 1-6, wherein, The housing (10) is covered with a protective layer, which is a paint layer.
10. An electrical device, characterized by A battery cell as claimed in any of claims 1 to 9.