Square battery
By combining the first and second shells and using heat-sealing technology, the problem of difficult welding of thin-film cover plates was solved, resulting in a battery with simple structure, good stability, and reliable electrical connection.
Patent Information
- Application Number
- CN202423038939.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The cover plate of existing square batteries is a thin sheet structure, which makes welding difficult and affects the quality and stability of the battery.
The system employs a combination structure of a first housing and a second housing. The battery cell is placed through the first opening, and the second housing is fitted onto the connecting housing and sealed. The connection is achieved using methods such as stepped surfaces and welding, combined with heat-sealing technology to ensure a stable connection between the electrode post and the housing.
It reduces welding difficulty, improves battery structural stability and assembly precision, prevents short circuits, and simplifies circuit connections.
Smart Images
Figure CN223941866U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, specifically to a square battery. Background Technology
[0002] With the rapid development of portable electronic devices, electric vehicles, and renewable energy storage systems, the demands and challenges of battery technology are also increasing. Conventional prismatic batteries consist of components such as a casing, cells, and a cover plate. The cells are inserted into the casing, and the cover plate is welded to the top of the casing. However, in existing technologies, the cover plate is a thin sheet structure. Issues such as the flatness of the thin sheet structure increase the difficulty of welding the cover plate to the casing, which affects the quality and stability of the prismatic battery. Utility Model Content
[0003] The purpose of this invention is to provide a square battery that is simple in structure, easy to connect, and has good structural stability.
[0004] A square battery includes a first housing, a second housing, and a battery cell. The battery cell is located inside the first housing. The first housing has a first opening. The battery cell is disposed inside the first housing. A connecting shell is formed on the outer peripheral surface of the first housing near the first opening. The second housing is fitted onto the connecting shell and seals the first opening.
[0005] In the above scheme, the battery cell can be placed inside the first housing through the first opening. The second housing is fitted onto the connecting shell at the end of the first housing near the first opening to connect the first housing and seal the first opening. The overall structure is simple. The first housing and the second housing are fitted together and then fixed by welding or other methods, which is less difficult and more stable than welding a thin cover plate in the traditional method.
[0006] Furthermore, the second housing is provided with a second opening.
[0007] In the above scheme, the second opening allows the second shell to be fitted onto the connecting shell. The second shell has a square structure, and the second opening is square, making the structure simple and easy to process.
[0008] Furthermore, a stepped surface is formed at one end of the first housing near the connecting housing, and one end of the second opening of the second housing abuts against the stepped surface.
[0009] In the above scheme, a stepped surface is formed on the first shell. When the second shell is fitted onto the connecting shell, one end of the second opening of the second shell abuts against the stepped surface, and the first shell and the second shell are connected at the step surface by welding or other means. This reduces the welding difficulty and ensures the accuracy and uniformity of the assembly of the first shell and the second shell, thereby ensuring the assembly quality of the square battery.
[0010] Furthermore, the connecting shell is integrally formed with the first shell.
[0011] In the above scheme, the integral molding structure of the connecting shell and the first shell is more stable.
[0012] Furthermore, the ends of the first or second housing are provided with a positive terminal and a negative terminal, which are located on the same side.
[0013] In the above scheme, the positive and negative terminals are located on the same side of the first or second housing, which makes it easier to process and assemble, and makes it easier to keep the positive and negative terminals of the square battery out on the same side, making the external circuit connection simpler and more intuitive.
[0014] Furthermore, the positive electrode post includes a first insulating element and a first metal sheet, the first metal sheet being connected to the positive electrode of the battery cell, and the first metal sheet being heat-sealed to the first housing or the second housing through the first insulating element.
[0015] In the above scheme, the first insulating sheet enables the first metal sheet to be connected to the first housing or the second housing by heat sealing. The heat sealing connection technology is fast and reliable. The first insulating sheet prevents the first metal sheet from directly contacting the first housing or the second housing, thereby preventing short circuits and ensuring a stable electrical connection between the first metal sheet and the positive electrode of the battery cell.
[0016] Furthermore, the negative electrode post includes a second insulating member and a second metal sheet, the second metal sheet being connected to the negative electrode of the battery cell, and the second metal sheet being heat-sealed to the first housing or the second housing through the second insulating member.
[0017] In the above scheme, the second insulating sheet enables the second metal sheet to be connected to the first or second housing by heat sealing. The heat sealing connection technology is fast and reliable. The second insulating sheet prevents the second metal sheet from directly contacting the first or second housing, thereby preventing short circuits and ensuring a stable electrical connection between the second metal sheet and the negative electrode of the battery cell.
[0018] Furthermore, the first housing or the second housing has two first through holes at its end, and the first insulating sheet and the second insulating sheet have a second through hole and a third through hole, respectively.
[0019] In the above scheme, two first through holes are formed at the ends of the first housing or the second housing, and a second through hole is formed on the first insulating sheet, allowing the first metal sheet to be connected to the positive electrode of the battery cell. A third through hole is formed on the second insulating sheet, allowing the second metal sheet to be connected to the negative electrode of the battery cell. The design of the first, second, and third through holes allows the first and second metal sheets to be accurately positioned and fixed in their respective positions, ensuring reliable connection with the positive and negative electrodes of the battery cell.
[0020] This utility model discloses a square battery with the advantages of simple structure, convenient connection, and good structural stability. The first opening allows the battery cell to be placed inside the first housing. The second housing is fitted onto the connecting shell near the first opening of the first housing, connecting the first and second housings and sealing the first opening. The overall structure is simple. The first and second housings are fitted together and then fixed by welding, which is less difficult and more stable than the traditional method of welding a thin cover plate. Attached Figure Description
[0021] Figure 1 An exploded view of a square battery according to one embodiment.
[0022] Figure 2 This is a first housing structure diagram of one embodiment.
[0023] Figure 3 An exploded view of a second housing with a positive terminal and a negative terminal installed, according to one embodiment.
[0024] Figure 4 for Figure 2 A magnified view of a portion of point A in the middle.
[0025] Figure 5 This is an overall structural diagram of a square battery according to one embodiment.
[0026] Figure 6 This is a cross-sectional view of a square battery according to one embodiment.
[0027] Explanation of reference numerals in the attached diagram: 1. First housing; 2. Second housing; 3. Battery cell; 4. First opening; 101. Connecting shell; 5. Second opening; 6. Stepped surface; 7. Positive electrode post; 711. First insulating sheet; 712. First metal sheet; 8. Negative electrode post; 811. Second insulating sheet; 812. Second metal sheet; 9. First through hole; 10. Second through hole; 11. Third through hole; 12. Positive electrode plate; 13. Negative electrode plate. Detailed Implementation
[0028] The present invention provides a square battery in further detail below with reference to specific embodiments and accompanying drawings.
[0029] like Figure 1 and Figure 2 As shown in a preferred embodiment, a square battery of the present invention includes a first housing 1, a second housing 2, and a battery cell 3. The battery cell 3 is located inside the first housing 1. The first housing 1 has a first opening 4. A connecting shell 101 is formed on the outer peripheral surface of the first housing 1 near the first opening 4. The second housing 2 is fitted onto the connecting shell 101 and seals the first opening 4. The first opening 4 allows the battery cell 3 to be placed inside the first housing 1. The second housing 2 is fitted onto the connecting shell 101 near the first opening 4 to connect the first housing 1 and the second housing 2, and seals the first opening 4. The overall structure is simple. The first housing 1 and the second housing 2 are fitted together and then fixed by welding or other methods, which is less difficult and more stable than welding a thin cover plate in the traditional method.
[0030] In the above embodiments, both the first shell 1 and the second shell 2 are hollow shell structures.
[0031] like Figure 1 and Figure 3 As shown, in some embodiments, the second housing 2 is provided with a second opening 5. The second opening 5 allows the second housing 2 to be fitted onto the connecting housing 101. The second housing 2 has a square structure, and the second opening 5 is square, making the structure simple and easy to process.
[0032] like Figure 1 and Figure 4 As shown, in some embodiments, a stepped surface 6 is formed at one end of the first housing 1 near the connecting housing 101, and one end of the second opening 5 of the second housing 2 abuts against the stepped surface 6. The stepped surface 6 is formed on the first housing 1. When the second housing 2 is fitted onto the connecting housing 101, one end of the second opening 5 of the second housing 2 abuts against the stepped surface 6. The stepped surface 6 provides precise positioning. The first housing 1 and the second housing 2 are connected at the position of the stepped surface 6 by welding or other methods. This reduces welding difficulty and ensures the accuracy and uniformity of the assembly of the first housing 1 and the second housing 2, thereby guaranteeing the assembly quality of the square battery.
[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the connecting shell 101 is integrally formed with the first shell 1. The integrally formed structure of the connecting shell 101 and the first shell 1 is more stable, thereby ensuring the overall structural stability of the battery.
[0034] like Figure 5As shown, in some embodiments, the ends of the first housing 1 or the second housing 2 are provided with a positive terminal 7 and a negative terminal 8, which are located on the same side. Having the positive terminal 7 and the negative terminal 8 on the same side of the first housing 1 or the second housing 2 facilitates processing and assembly, makes it easier to keep the positive and negative terminals of the square battery leading out on the same side, and makes external circuit connections simpler and more intuitive.
[0035] In some embodiments, the positive electrode post 7 includes a first insulating member and a first metal sheet 712. The first metal sheet 712 is connected to the positive electrode plate 12 of the battery cell 3. The first metal sheet 712 is heat-sealed to the first housing 1 or the second housing 2 through the first insulating member. The first insulating sheet 711 enables the first metal sheet 712 to be heat-sealed to the first housing 1 or the second housing 2. The heat-sealing connection technology is fast and reliable. The first insulating sheet 711 prevents the first metal sheet 712 from directly contacting the first housing 1 or the second housing 2, thereby preventing short circuits and ensuring a stable electrical connection between the first metal sheet 712 and the positive electrode plate 12 of the battery cell 3. Figure 1 , Figure 3 and Figure 5 The positive terminal 7 shown is connected to the first housing 1.
[0036] In some embodiments, the negative electrode post 8 includes a second insulating member and a second metal sheet 812. The second metal sheet 812 is connected to the negative electrode 13 of the battery cell 3, and the second metal sheet 812 is heat-sealed to the first housing 1 or the second housing 2 through the second insulating member. The second insulating sheet 811 allows the second metal sheet 812 to be heat-sealed to the first housing 1 or the second housing 2. This heat-sealing technology is fast and reliable. The second insulating sheet 811 prevents direct contact between the second metal sheet 812 and the first housing 1 or the second housing 2, thus preventing short circuits and ensuring a stable electrical connection between the second metal sheet 812 and the negative electrode 13 of the battery cell 3. Similarly, Figure 1 , Figure 3 and Figure 5 The negative terminal 8 shown is connected to the first housing 1.
[0037] In some embodiments, the first housing 1 or the second housing 2 has two first through holes 9 at its end, and the first insulating sheet 711 and the second insulating sheet 811 have second through holes 10 and third through holes 11, respectively. The two first through holes 9 at the end of the first housing 1 or the second housing 2, and the second through hole 10 on the first insulating sheet 711, allow the first metal sheet 712 to connect to the positive electrode 12 of the battery cell 3. The third through hole 11 on the second insulating sheet 811 allows the second metal sheet 812 to connect to the negative electrode 13 of the battery cell 3. The design of the first through holes 9, the second through holes 10, and the third through holes 11 ensures that the first metal sheet 712 and the second metal sheet 812 can be accurately positioned and fixed in their respective positions, guaranteeing a reliable connection with the positive electrode 12 and the negative electrode 13 of the battery cell 3. Figure 1 and Figure 3 The two first through holes 9 shown are located in the first housing 1.
[0038] Specifically, the first metal sheet 712, the second metal sheet 812, the first insulating sheet 711, the second insulating sheet 811, as well as the first through hole 9, the second through hole 10, and the third through hole 11 can all be rectangular for easy processing.
[0039] This utility model discloses the working principle and process of a square battery. During assembly, the battery cell 3 is first placed inside the second housing 2. The connecting shell 101 on the second housing 2 wraps around the battery cell 3. The second housing 2 is fitted onto the connecting shell 101 until one end of the second opening 5 abuts against the stepped surface 6. Then, the second housing 2 is sealed to the first housing 1 by welding or other methods. One end of the first housing 1 or the second housing 2 is provided with two first through holes 9. The positive electrode 12 and the negative electrode 13 of the battery cell 3 are located on the same side and placed facing the first through holes 9. The first metal sheet 712 and the second metal sheet 812 are heat-sealed to the first housing 1 or the second housing 2 through the first insulating sheet 711 and the second insulating sheet 811, so that the first metal sheet 712 and the second metal sheet 812 are electrically connected to the positive electrode 12 and the negative electrode 13 of the battery cell 3, respectively.
[0040] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0043] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.
Claims
1. A square battery, characterized in that, The device includes a first housing, a second housing, and a battery cell. The battery cell is located inside the first housing. The first housing has a first opening. The battery cell is disposed inside the first housing. A connecting shell is formed on the outer peripheral surface of the first housing near the first opening. The second housing is fitted onto the connecting shell and seals the first opening.
2. The square battery according to claim 1, characterized in that, The second housing has a second opening.
3. The square battery according to claim 2, characterized in that, The first housing has a stepped surface at one end near the connecting housing, and one end of the second opening of the second housing abuts against the stepped surface.
4. The square battery according to claim 3, characterized in that, The connecting shell is integrally formed with the first shell.
5. The square battery according to claim 1, characterized in that, The first or second housing has a positive terminal and a negative terminal at its end, and the positive terminal and the negative terminal are located on the same side.
6. The square battery according to claim 5, characterized in that, The positive electrode post includes a first insulating element and a first metal sheet. The first metal sheet is connected to the positive electrode of the battery cell. The first metal sheet is heat-sealed to the first housing or the second housing through the first insulating element.
7. The square battery according to claim 6, characterized in that, The negative electrode post includes a second insulating element and a second metal sheet. The second metal sheet is connected to the negative electrode of the battery cell. The second metal sheet is heat-sealed to the first housing or the second housing through the second insulating element.
8. The square battery according to claim 7, characterized in that, The first housing or the second housing has two first through holes at its end, and the first insulating member and the second insulating member have a second through hole and a third through hole, respectively.