Cylindrical battery integrated with three battery cells

Abstract

The utility model discloses a cylindrical battery integrating three battery cells, which comprises a shell with an opening at one end and a cover plate, a battery cell group is arranged in the shell, the battery cell group comprises three battery cells, the three battery cells are triangularly distributed, two ends of the battery cell group are respectively connected with a positive collector plate and a negative collector plate, the negative collector plate is provided with a pole stud, and the pole stud is connected with the shell. The pole stud penetrates through the shell in an insulating mode and is connected with a nut arranged on the outer side of the shell, the negative current collecting disc and the nut are both connected with the shell in an insulating mode, the positive current collecting disc is provided with a step edge, the two sides of the step edge are connected with the shell and the cover plate respectively, and the cover plate and the positive current collecting disc are provided with pressure relief holes which are communicated with each other respectively. And a pressure relief valve plate is arranged at the pressure relief hole of the positive flow collecting disc. The utility model has the beneficial effects that the three battery cells are integrated in one shell, so that the energy density and the battery capacity of the single battery are effectively increased.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical battery technology, specifically to a cylindrical battery with integrated three cells. Background Technology

[0002] Cylindrical batteries offer advantages such as good consistency, high production efficiency, and strong system-level heat dissipation, leading to their increasingly widespread application, particularly in the power and energy storage sectors. However, batteries used in power or energy storage applications often require high energy density and capacity. Current cylindrical battery cells typically contain only one core within their casing, resulting in lower energy density and smaller capacity per cell. A single large cell cannot meet power supply demands, necessitating the assembly of multiple cells into battery modules using structural components such as current-carrying sheets. This process is time-consuming and costly. Furthermore, the welding of individual cells using structural components can be affected by assembly quality, increasing the defect rate of the battery module and impacting its performance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cylindrical battery with integrated three cells, which integrates three cells in one casing, effectively increasing the energy density and battery capacity of a single battery.

[0004] The purpose of this utility model is achieved through the following technical measures: a cylindrical battery with integrated three cells, including a shell and a cover plate with one end open, a cell assembly inside the shell, the cell assembly including three cells arranged in a triangle, a positive current collector and a negative current collector respectively connected to the two ends of the cell assembly, a terminal stud provided on the negative current collector, the terminal stud insulatingly penetrating the shell and connected to a nut provided on the outside of the shell, the negative current collector and the nut being insulated from the shell, the positive current collector having a stepped edge, the two sides of the stepped edge being connected to the shell and the cover plate respectively, the cover plate and the positive current collector having interconnected pressure relief holes, and a pressure relief valve plate provided at the pressure relief hole of the positive current collector.

[0005] In some embodiments, the electrode stud is coaxial with the center axis of the triangular distribution of the battery cell.

[0006] In some embodiments, the pressure relief hole is coaxial with the center axis of the triangular distribution of the battery cells.

[0007] In some embodiments, an upper insulating gasket is provided between the nut and the housing.

[0008] In some embodiments, a sealing ring is provided between the pole stud and the housing.

[0009] In some embodiments, a lower insulating pad is provided between the negative current collector and the housing.

[0010] In some embodiments, the lower insulating pad is fitted over the outside of the sealing ring and contacts the sealing ring.

[0011] In some embodiments, the edge of the lower insulating pad extends to the outside of the negative current collector.

[0012] In some embodiments, the lower insulating pad is made of plastic.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model integrates three battery cells into one housing, effectively improving the energy density and capacity of a single battery cell. Given a fixed total demand, it can effectively reduce the number of single battery cells used, thereby reducing the number of structural components such as current-carrying plates, lowering assembly costs, and improving assembly efficiency. This disclosure uses terminal studs, with nuts used to fix the terminal to the housing. Existing technologies use stamping to fix the terminal to the housing; the structure of this disclosure can greatly reduce the impact on the negative current collector and battery cells when fixing the terminal to the housing.

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0018] Figure 4 yes Figure 2 Enlarged view of part B in the middle.

[0019] The components are: 1. Housing, 2. Nut, 3. Battery cell, 4. Terminal stud, 5. Sealing ring, 6. Negative current collector, 7. Lower insulating pad, 8. Positive current collector, 9. Cover plate, 10. Pressure relief valve plate, and 11. Upper insulating pad. Detailed Implementation

[0020] like Figures 1 to 4As shown, a cylindrical battery integrating three cells includes a housing 1 with one open end and a cover plate 9. The housing 1 contains a cell assembly, which includes three cells 3 arranged in a triangle. The two ends of the cell assembly are respectively connected to a positive current collector 8 and a negative current collector 6. All three cells 3 are connected to the positive current collector 8 and the negative current collector 6 and are connected in parallel. The negative current collector 6 is provided with a terminal stud 4. Specifically, the terminal stud 4 is integrally formed with the negative current collector 6. The terminal stud 4 is insulated through the housing 1 and connected to a nut 2 located on the outside of the housing 1. The negative current collector 6 and the nut 2 are both insulated from the housing 1. Preferably, the terminal stud 4 is coaxial with the center of the triangular arrangement of the cells 3. The positive current collector 8 has a stepped edge, and the two sides of the stepped edge are connected to the housing 1 and the cover plate 9, respectively. The cover plate 9 and the positive current collector 8 are respectively provided with interconnected pressure relief holes. A pressure relief valve 10 is provided at the pressure relief hole of the positive current collector 8. When the pressure inside the housing 1 reaches the maximum bearing pressure of the pressure relief valve 10, the pressure relief valve 10 is ruptured, and the pressure inside the housing 1 is released. Preferably, the pressure relief hole is coaxial with the center of the triangular distribution of the battery cells 3. This disclosure integrates three battery cells 3 into one housing 1, which effectively improves the energy density and battery capacity of a single battery cell. Under the condition of a fixed total demand, it can effectively reduce the number of single batteries used, thereby reducing the number of structural components such as current carrier plates used, reducing assembly costs, and improving assembly efficiency. Furthermore, this disclosure uses a stud 4 for the electrode and a nut 2 to fix the electrode to the housing 1. In the prior art, the electrode is fixed to the housing 1 by stamping. The structure of this disclosure can greatly reduce the impact on the negative current collector 6 and the battery cell 3 when the electrode is fixed to the housing 1. In particular, the triangularly distributed battery cell 3 in this disclosure will generate a gap at the distribution center. When the electrode is located at the distribution center, the electrode is directly above the gap. The stamping method has a greater impact on the negative current collector 6. The structure of this disclosure has obvious advantages.

[0021] In some embodiments, an upper insulating pad 11 is provided between the nut 2 and the housing 1 to achieve insulation between the nut 2 and the housing 1.

[0022] In some embodiments, a sealing ring 5 is provided between the pole stud 4 and the housing 1 to achieve insulation between the pole stud 4 and the housing 1.

[0023] In some embodiments, a lower insulating pad 7 is provided between the negative current collector 6 and the housing 1 to achieve insulation between the negative current collector 6 and the housing 1.

[0024] In some embodiments, the lower insulating pad 7 is fitted over the outside of the sealing ring 5 and contacts the sealing ring 5. Fitting the lower insulating pad 7 over the outside of the sealing ring 5 ensures that the lower insulating pad 7 contacts the sealing ring 5, preventing gaps between the sealing ring 5 and the lower insulating pad 7, and effectively isolating the negative current collector 6 and the pole stud 4 from the housing 1.

[0025] In some embodiments, the edge of the lower insulating pad 7 extends to the outside of the negative current collector 6. Specifically, the lower insulating pad 7 is slightly larger than the negative current collector 6. During assembly, the edge of the lower insulating pad 7 contacts the inner wall of the housing 1, effectively isolating the housing 1 from the negative current collector 6.

[0026] In some embodiments, the lower insulating pad 7 is made of plastic.

[0027] In the description of this utility model, it should be understood that 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An integrated three-electrode cylindrical battery, characterized by: The application relates to a battery pack, which comprises a shell with an open end and a cover plate, a battery cell group is arranged in the shell, the battery cell group comprises three battery cells, the three battery cells are distributed in a triangular shape, positive and negative current collectors are respectively arranged at two ends of the battery cell group, a pole stud is arranged on the negative current collector, the pole stud penetrates through the shell in an insulating mode and is connected with a nut arranged outside the shell, the negative current collector and the nut are connected with the shell in an insulating mode, the positive current collector is provided with a stepped edge, the two sides of the stepped edge are connected with the shell and the cover plate respectively, the cover plate and the positive current collector are respectively provided with pressure relief holes which are communicated with each other, and a pressure relief valve is arranged at the pressure relief hole of the positive current collector. 2.The integrated three-electric-cell cylindrical battery of claim 1, wherein: The pole stud is coaxial with the center of the triangular distribution of the battery cells. 3.The integrated three-electric-cell cylindrical battery of claim 1, wherein: The pressure relief hole is coaxial with the center of the triangular distribution of the battery cells. 4.The integrated three-electric-cell cylindrical battery of claim 1, wherein: An upper insulating pad is arranged between the nut and the shell. 5.The integrated three-electric-cell cylindrical battery of claim 1, wherein: A sealing ring is arranged between the pole stud and the shell. 6.The integrated three-electric-cell cylindrical battery of claim 5, wherein: A lower insulating pad is arranged between the negative current collector and the shell. 7.The integrated three-electric-cell cylindrical battery of claim 6, wherein: The lower insulating pad is sleeved outside the sealing ring and is in contact with the sealing ring. 8.The integrated three-electric-cell cylindrical battery of claim 6, wherein: The edge of the lower insulating pad extends to the outside of the negative current collector. 9.The integrated three-electric-cell cylindrical battery of claim 6, wherein: The lower insulating pad is made of plastic.

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