Battery cell shell and battery monomer
By introducing supplementary corners and transition sections into the cell casing of lithium-ion batteries, the problem of misalignment between the cover plate and the casing is solved, improving the adaptability and connection strength between the cell casing and the cover plate, and enhancing the structural strength of the battery cell.
Patent Information
- Application Number
- CN202422634200.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-30
AI Technical Summary
During the assembly of the cover plate and the casing of a lithium-ion battery, the large rounded corners around the cover plate can lead to improper assembly, increasing the defect rate and affecting the compatibility and connection strength between the cell casing and the cover plate.
Design a battery cell housing including a base plate, side plates and a corner supplement. The side plates form a placement cavity, and the corner supplement is located inside the corner of the side plate to fit tightly against the cover plate, increasing the contact between the battery cell housing and the cover plate at the corner. The side plates are connected by a transition section to improve adaptability and connection strength.
It improves the compatibility and welding yield of the cell casing and cover plate, enhances the connection strength between the cell casing and cover plate, and improves the structural strength of the battery cell.
Smart Images
Figure CN223612553U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a kind of electric core shell and battery monomer. BACKGROUND
[0002] With the increasingly mature lithium ion battery technology, lithium ion battery is widely used as power battery in electric vehicle and energy storage field, and the use performance and safety of lithium ion battery are increasingly high. Generally, battery includes electric core, shell and cover plate, electric core is arranged in shell, and cover plate is blocked in shell opening. In the actual assembly of cover plate and shell, since the cover plate is usually stainless steel material, in the process of stamping forming, larger fillet will be generated around the cover plate, which leads to the misalignment of cover plate and shell, and finally leads to the increase of overall defective rate.
[0003] Therefore, it is urgent to provide an electric core shell and battery monomer to solve the above problems. UTILITY MODEL CONTENT
[0004] The first purpose of the utility model is to provide an electric core shell, which can increase the contact of the electric core shell and the cover plate at the corner, improve the adaptation ability and welding yield of the electric core shell and the cover plate, and improve the structural strength of the electric core shell and the connection strength of the electric core shell and the cover plate.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] The electric core shell comprises:
[0007] A bottom plate;
[0008] A plurality of side plates, the plurality of side plates are sequentially arranged in a head-to-tail manner along the outer periphery of the bottom plate, and the plurality of side plates and the bottom plate form a placing cavity, and the electric core can be placed in the placing cavity;
[0009] A plurality of supplementary angles, each of the plurality of supplementary angles is located inside the joint corner of each adjacent two side plates, the supplementary angle is tightly attached to the inner wall of the corresponding two side plates, and when the side wall of the cover plate provided at the opening of the placing cavity is tightly attached to the inner wall of the side plate, the supplementary angle is tightly attached to the cover plate on the side away from the bottom plate.
[0010] As an optional technical solution of the electric core shell, the electric core shell further comprises a transition section, the transition section connects the adjacent two side plates, and the supplementary angle is tightly attached to the inner wall of the transition section and the inner wall of the side plate.
[0011] As an optional technical solution of the electric core shell, the transition section is a circular arc section.
[0012] As an optional technical solution of the electric core shell, the supplementary angle is a circular arc angle.
[0013] As an optional technical solution of the battery cell shell, one end surface of the arc angle abuts against the cover plate, and the other end surface of the arc angle abuts against the bottom plate.
[0014] As an optional technical solution of the battery cell shell, the difference between the height dimension of the arc segment and the height dimension of the arc angle is greater than or equal to the thickness dimension of the cover plate.
[0015] As an optional technical solution of the battery cell shell, along the thickness direction of the arc angle, only the outer arc ends of the arc angle are respectively connected with the inner walls of the corresponding side plates.
[0016] As an optional technical solution of the battery cell shell, along the thickness direction of the arc angle, all the arc ends of the arc angle are respectively connected with the inner walls of the corresponding side plates.
[0017] As an optional technical solution of the battery cell shell, the thickness of the arc segment is a, and the thickness of the side plate is b, and a<b.
[0018] The second purpose of the utility model is to provide a battery monomer, which has high structural strength.
[0019] To achieve the purpose, the utility model adopts the following technical scheme:
[0020] The battery monomer comprises a battery cell, a cover plate and the above-mentioned battery cell shell, the battery cell is located in the placement cavity, and the cover plate is arranged on the opening of the placement cavity.
[0021] The utility model has the advantages of:
[0022] The battery cell shell provided by the utility model comprises a bottom plate, a plurality of side plates and a plurality of supplementary angles. The plurality of side plates are sequentially and circularly arranged along the outer periphery of the bottom plate, and the plurality of side plates and the bottom plate form a placement cavity. The battery cell can be placed in the placement cavity to protect the battery cell. The supplementary angles are arranged in the inner side of the connecting corner of each two adjacent side plates, and the supplementary angles are tightly arranged on the inner walls of the corresponding two side plates to fill the connecting corner of the battery cell shell. When the side wall of the cover plate arranged on the opening of the placement cavity is tightly arranged on the inner wall of the side plate, the supplementary angle is tightly arranged on the cover plate on the side away from the bottom plate, the contact between the battery cell shell and the cover plate at the connecting corner is increased, and the matching ability and the welding yield of the battery cell shell and the cover plate are improved. In addition, the supplementary angle can support the cover plate, increase the connecting strength of the battery cell shell and the cover plate, and increase the structural strength of the connecting corner of the battery cell shell. DRAWINGS
[0023] Figure 1 Fig. 1 is a first structural schematic view of the battery cell shell provided by the utility model embodiment;
[0024] Figure 2is a second structural schematic view of the battery cell shell provided by the embodiment of the utility model;
[0025] Figure 3 is Figure 1 The enlarged view at A;
[0026] Figure 4 is the assembly view of the battery cell shell and the cover plate provided by the embodiment of the utility model.
[0027] In the figure:
[0028] 10, cover plate;
[0029] 100, bottom plate; 200, side plate; 300, supplementary angle; 400, transition section. DETAILED DESCRIPTION
[0030] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0031] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" 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. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0032] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates 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 includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0033] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0034] The electric core shell provided by the present embodiment can increase the contact between the electric core shell and the cover plate 10 at the corner, thereby improving the fitting ability and welding yield of the electric core shell and the cover plate 10, and increasing the structural strength of the electric core shell and the connection strength between the electric core shell and the cover plate 10.
[0035] As shown in particular in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the electric core shell comprises a bottom plate 100, a plurality of side plates 200 and a plurality of supplementary corners 300. The plurality of side plates 200 are sequentially arranged in a head-to-tail manner along the outer periphery of the bottom plate 100, and the plurality of side plates 200 and the bottom plate 100 form a placement cavity, and the electric core can be placed in the placement cavity. The plurality of supplementary corners 300 are respectively located inside the joint corner of each adjacent two side plates 200, and the supplementary corner 300 is tightly attached to the inner wall of the corresponding two side plates 200, so that when the side wall of the cover plate 10 provided with the cover at the opening of the placement cavity is tightly attached to the inner wall of the side plate 200, the supplementary corner 300 is tightly attached to the cover plate 10 on the side away from the bottom plate 100.
[0036] Based on the above design, the plurality of side plates 200 are sequentially arranged in a head-to-tail manner along the outer periphery of the bottom plate 100, and the plurality of side plates 200 and the bottom plate 100 form a placement cavity, and the electric core can be placed in the placement cavity to protect the electric core. The plurality of supplementary corners 300 are respectively located inside the joint corner of each adjacent two side plates 200, and the supplementary corner 300 is tightly attached to the inner wall of the corresponding two side plates 200, so as to fill the corner of the electric core shell, so that when the side wall of the cover plate 10 provided with the cover at the opening of the placement cavity is tightly attached to the inner wall of the side plate 200, the supplementary corner 300 is tightly attached to the cover plate 10 on the side away from the bottom plate 100, thereby increasing the contact between the electric core shell and the cover plate 10 at the corner, and improving the fitting ability and welding yield of the electric core shell and the cover plate 10; and the supplementary corner 300 can not only support the cover plate 10 to increase the connection strength between the electric core shell and the cover plate 10, but also increase the structural strength of the corner of the electric core shell itself.
[0037] In the present embodiment, the number of side plates 200 is four, and the four side plates 200 are vertically arranged on the bottom plate 100, and the corner of the electric core shell is ninety degrees.
[0038] In other embodiments, the number of side plates 200 can also be three, five, six or seven, etc., and the present application does not make specific limitations thereto.
[0039] Further, the cell shell further comprises a transition section 400 connecting the two adjacent side plates 200, and the supplementary corner 300 is close to the inner wall of the transition section 400 and the inner wall of the side plate 200. The transition section 400 can reduce the manufacturing difficulty of the cell shell and increase the connection strength of the two adjacent side plates 200.
[0040] Further, the transition section 400 is a circular arc section, which can avoid the outer side of the cell shell being scratched or scraped, and make the shape of the corner of the cell shell and the edge corner of the cover plate 10 adaptive, thereby facilitating the assembly of the cover plate 10.
[0041] In the embodiment, the cell shell is integrally formed, that is, the side plate 200 and the circular arc section are integrally formed.
[0042] As shown in FIGS. 1-3, the cell shell comprises a bottom plate 100, a cover plate 10, a plurality of side plates 200, a plurality of supplementary corners 300 and a plurality of transition sections 400. Figure 1 As shown in FIGS. 1-3, the cell shell comprises a bottom plate 100, a cover plate 10, a plurality of side plates 200, a plurality of supplementary corners 300 and a plurality of transition sections 400. Figure 3 As shown in FIGS. 1-3, the cell shell comprises a bottom plate 100, a cover plate 10, a plurality of side plates 200, a plurality of supplementary corners 300 and a plurality of transition sections 400.
[0043] Further, the supplementary corner 300 is a circular arc corner, which increases the adaptability of the supplementary corner 300 and the corner (circular arc section) of the cell shell.
[0044] Optionally, only the corner of the cell shell close to the cover plate 10 is covered with the circular arc corner along the height direction of the cell shell, so that one end surface of the circular arc corner abuts against the cover plate 10, and the other end of the circular arc corner is not connected with the bottom plate 100.
[0045] Optionally, one end surface of the circular arc corner abuts against the cover plate 10, and the other end surface of the circular arc corner abuts against the bottom plate 100, that is, almost the entire corner is covered with the circular arc corner along the height direction of the cell shell.
[0046] Further, in order to save space and make the cover plate 10 completely embedded in the cell shell, the difference between the height dimension of the circular arc section and the height dimension of the circular arc corner is greater than or equal to the thickness dimension of the cover plate 10.
[0047] Optionally, only the outer circular arc ends of the circular arc corner are connected with the inner walls of the corresponding side plates 200 along the thickness direction of the circular arc corner, that is, the inner radius and the outer radius of the circular arc corner are the same, which is simple to manufacture. Alternatively, both ends of the circular arc of the circular arc corner are connected with the inner walls of the corresponding side plates 200 along the thickness direction of the circular arc corner, that is, the inner radius of the circular arc corner is greater than the outer radius, so that the circular arc corner and the inner wall of the side plate 200 are smoothly connected, and the cell is prevented from being scratched.
[0048] In the embodiment, the circular arc corner, the side plate 200 and the circular arc section are integrally formed.
[0049] The battery monomer provided in the embodiment has high structural strength.
[0050] Specifically, the battery monomer includes the electric core, the cover plate 10 and the electric core shell, the electric core is located in the placing cavity, and the cover plate 10 is covered in the opening of the placing cavity.Because of the electric core shell, when the side wall of the cover plate 10 is tightly attached to the inner wall of the side plate 200, the back corner 300 is tightly attached to the cover plate 10 away from the side of the bottom plate 100, the contact between the electric core shell and the cover plate 10 at the corner is increased, and the adaptation ability and the welding yield of the electric core shell and the cover plate 10 can be improved; and the back corner 300 can support the cover plate 10, increase the connection strength between the electric core shell and the cover plate 10, and also increase the structural strength of the corner of the electric core shell itself, finally improve the strength of the battery monomer.
[0051] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all the implementation modes need not to be exhausted. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. An electric cell housing, characterized by, The battery cell shell comprises: a bottom plate (100); a plurality of side plates (200) arranged in sequence along the outer periphery of the bottom plate (100), the plurality of side plates (200) and the bottom plate (100) form a placing cavity, and the battery cell can be placed in the placing cavity; a plurality of supplementary angles (300), each of the plurality of supplementary angles (300) is located inside the joint corner of every two adjacent side plates (200), the supplementary angle (300) is tightly attached to the inner wall of the corresponding two side plates (200), when the side wall of the cover plate (10) covering the opening of the placing cavity is tightly attached to the inner wall of the side plate (200), the supplementary angle (300) is tightly attached to the side of the bottom plate (100) away from the bottom plate (100).
2. The cell case of claim 1, wherein, The battery cell shell further comprises a transition section (400), the transition section (400) connects the adjacent two side plates (200), and the supplementary angle (300) is tightly attached to the inner wall of the transition section (400) and the inner wall of the side plate (200).
3. The cell case of claim 2, wherein, The transition section (400) is a circular arc section.
4. The cell case of claim 3, wherein, The supplementary angle (300) is a circular arc angle.
5. The cell housing of claim 4, wherein, One end surface of the circular arc angle abuts against the cover plate (10), and the other end surface of the circular arc angle abuts against the bottom plate (100).
6. The cell housing of claim 5, wherein, The difference between the height dimension of the circular arc section and the height dimension of the circular arc angle is greater than or equal to the thickness dimension of the cover plate (10).
7. The cell case of claim 5, wherein, In the thickness direction of the circular arc angle, only the outer circular arc ends of the circular arc angle are respectively connected to the inner walls of the corresponding side plates (200).
8. The cell case of claim 5, wherein, In the thickness direction of the circular arc angle, all the circular arc ends of the circular arc angle are respectively connected to the inner walls of the corresponding side plates (200).
9. The cell case of claim 3, wherein, The thickness of the circular arc section is a, and the thickness of the side plate (200) is b, a<b.
10. A battery cell comprising a cell core and a cover plate (10), characterized in that The battery cell further comprises the battery cell shell of any one of claims 1-9, the battery cell is located in the placing cavity, and the cover plate (10) covers the opening of the placing cavity.