Cylindrical battery, battery pack, and electric device

Abstract

Embodiments of the present disclosure relate to a cylindrical battery, a battery pack, and an electric device. The cylindrical battery comprises a cylindrical casing, an insulating sealing ring, a conductive member, a battery cell, and a control panel. The cylindrical casing is provided with an open end and a closed end opposite to each other, and the insulating sealing ring is accommodated in the cylindrical casing and fitted over the outer side wall of the conductive member. A first circular protrusion projects from the inner side wall of the open end, and circumferentially squeezes the insulating sealing ring to deform, and a sealed accommodating cavity is formed between the insulating sealing ring and the closed end. The battery cell is accommodated in the accommodating cavity, and has a first electrode and a second electrode having opposite polarities, the first electrode is electrically connected to the conductive member, and the second electrode is electrically connected to the end wall of the closed end. The control panel is disposed on the side of the insulating sealing ring distant from the accommodating cavity, and a control circuit of the control panel is electrically connected to the conductive member and the cylindrical casing, respectively. The cylindrical battery, the battery pack, and the electric device have the characteristics of better sealing performance and a more reliable sealing structure.

Description

Cylindrical battery, battery pack and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202321663954.1, filed with the Patent Office of China on June 27, 2023, entitled “A Cylindrical Battery and Electrical Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular to a cylindrical battery, a battery pack, and an electrical device. Background Art

[0004] Currently, cylindrical batteries on the market use a one-time sealing method, where the control board fits in the housing after the battery cell is placed in the housing and liquid is injected. This method offers poor sealing effectiveness and an unreliable sealing structure, often leading to leakage due to deformation of the mating structure between the control board and the housing.

[0005] Application Contents

[0006] The purpose of the present disclosure includes, for example, providing a cylindrical battery, a battery pack and an electrical device to improve the deficiencies of the related art, with better sealing effect and more reliable sealing structure.

[0007] The embodiments of the present disclosure may be implemented as follows:

[0008] An embodiment of the present disclosure provides a cylindrical battery, comprising a cylindrical housing, an insulating sealing ring, a conductive member, a battery cell, and a control board. The cylindrical housing has an open end and a closed end opposite to each other. The insulating sealing ring is accommodated in the cylindrical housing and sleeved on the outer wall of the conductive member.

[0009] A first ring wall is protruded on the inner side wall of the open end, and the first ring wall circumferentially squeezes the insulating sealing ring to deform it, forming a sealed accommodating cavity between the insulating sealing ring and the closed end;

[0010] The battery cell is accommodated in the accommodating cavity, and the battery cell has a first electrode and a second electrode with opposite polarities, the first electrode is electrically connected to the conductive member, and the second electrode is electrically connected to the end wall of the closed end;

[0011] The control board is arranged on a side of the insulating sealing ring away from the accommodating cavity, and a control circuit of the control board is electrically connected to the conductive member and the cylindrical shell respectively.

[0012] Optionally, a matching ring groove is provided on the side wall of the conductive member, and the inner edge of the insulating sealing ring is circumferentially embedded in the matching ring groove.

[0013] Optionally, a first power connection plate is provided at one end of the conductive member close to the accommodating cavity, the first electrode is connected to the first power connection plate, and a second power connection plate is provided at one end of the conductive member away from the accommodating cavity, and the two side walls of the first power connection plate and the second power connection plate close to each other and the outer side wall of the conductive member form the matching annular groove.

[0014] Optionally, a matching recess is provided on the second power board, and a protrusion structure that is plugged into the matching recess is provided on the control board.

[0015] Optionally, a mating column is convexly provided on the second power board, and a recessed structure that is plugged into the mating column is provided on the control board.

[0016] Optionally, a first roller groove is formed on the outer side wall of the opening end at a position corresponding to the first ring wall.

[0017] Optionally, a first charge and discharge electrode is provided on the control board, and the first charge and discharge electrode is electrically connected to the conductive member.

[0018] Optionally, a second ring wall is protruding from the inner side wall of the open end, and the second ring wall is farther away from the closed end than the first ring wall;

[0019] The opening end is folded inward to form a stop portion, and the side of the second ring wall away from the first ring wall and the stop portion jointly clamp the control board.

[0020] Optionally, the stop portion forms a channel, and the first charge and discharge electrode extends out of the cylindrical shell through the channel.

[0021] Optionally, a second roller groove is formed on the outer side wall of the opening end at a position corresponding to the second ring wall.

[0022] Optionally, the control board includes an insulating base, the insulating base is clamped by the second ring wall and the stopper, and the first charge and discharge electrode is protruded on a side of the insulating base away from the second ring wall.

[0023] Optionally, the control board further includes a ejector pin, which is arranged on a side of the insulating substrate close to the second ring wall, and the ejector pin is electrically connected to the first charge and discharge electrode through a control circuit provided on the insulating substrate, and the ejector pin is connected to the conductive member.

[0024] Optionally, a second charge-discharge electrode is provided on the end wall of the closed end, and the second charge-discharge electrode is electrically connected to the second electrode.

[0025] An embodiment of the present disclosure further provides a battery pack, which includes the aforementioned cylindrical battery.

[0026] An embodiment of the present disclosure further provides an electrical device, comprising the aforementioned cylindrical battery or the aforementioned battery pack.

[0027] The beneficial effects brought about by the embodiments of the present disclosure include, for example:

[0028] This cylindrical battery uses a combination of an insulating seal ring and a conductive member to individually seal the cell chamber, separating the cell space from the control board space. The mating structure of the control board and the cylindrical housing does not affect the sealing of the cell chamber, and even if the mating structure of the control board and the cylindrical housing is deformed, leakage will not occur. Therefore, the cylindrical battery provided by the disclosed embodiments has better sealing and a more reliable sealing structure.

[0029] The battery pack includes the aforementioned cylindrical battery and has all the beneficial effects of the cylindrical battery.

[0030] The electrical device includes the aforementioned cylindrical battery or battery pack, and the electrical device has all the beneficial effects of the aforementioned cylindrical battery or battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be considered as limiting the scope. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0032] FIG1 is a schematic structural diagram of a cylindrical battery provided by one embodiment of the present disclosure;

[0033] FIG2 is a schematic diagram of the connection structure of the insulating sealing ring, the conductive member and the cylindrical housing in FIG1 ;

[0034] FIG3 is an enlarged schematic diagram of area A in FIG2 ;

[0035] FIG4 is an enlarged schematic diagram of area B in FIG2 ;

[0036] FIG5 is a schematic diagram of the connection structure between the insulating sealing ring, the conductive member and the cylindrical housing in another embodiment of the present disclosure;

[0037] FIG6 is a schematic diagram of the connection structure between the insulating sealing ring, the conductive member and the cylindrical shell in another embodiment of the present disclosure.

[0038] Icons: 100-cylindrical battery; 110-cylindrical shell; 111-open end; 112-closed end; 113-first ring wall; 114-first roller groove; 115-second ring wall; 116-stopper; 1161-channel; 117-second roller groove; 118-second charge and discharge electrode; 120-insulating sealing ring; 130-conductive member; 131-matching ring groove; 132-first power connection plate; 133-second power connection plate; 1331-matching recess; 1332-matching column; 140-battery cell; 141-first electrode; 142-second electrode; 150-control board; 151-first charge and discharge electrode; 152-insulating base; 153-thimble; 160-accommodating cavity. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure as claimed, but merely represents selected embodiments of the present disclosure. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of the present disclosure, it should be understood that if the terms "upper", "lower", "inside", "outside", "left", "right", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the present disclosure is usually placed when in use, or is the orientation or position relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0043] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0044] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0045] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0046] Please refer to Figures 1, 2, 3 and 4. Figure 1 is a structural schematic diagram of a cylindrical battery 100 provided in an embodiment of the present disclosure. Figure 2 is a schematic diagram of the connection structure between the insulating sealing ring 120, the conductive member 130 and the cylindrical shell 110 in Figure 1. Figure 3 is an enlarged schematic diagram of area A in Figure 2. Figure 4 is an enlarged schematic diagram of area B in Figure 2.

[0047] The cylindrical battery 100 provided in this embodiment includes a cylindrical shell 110, an insulating sealing ring 120, a conductive member 130, a battery cell 140, and a control board 150. The cylindrical shell 110 has an open end 111 and a closed end 112 opposite to each other. The insulating sealing ring 120 is accommodated in the cylindrical shell 110 and is sleeved on the outer wall of the conductive member 130. A first ring wall 113 is protruded on the inner wall of the open end 111. The first ring wall 113 circumferentially squeezes the insulating sealing ring 120 to deform it. The insulating sealing ring 120 and the closed end 112 are connected to each other. A sealed accommodating cavity 160 is formed between the ends 112; the battery cell 140 is accommodated in the accommodating cavity 160, and the battery cell 140 has a first electrode 141 and a second electrode 142 with opposite polarities, the first electrode 141 is electrically connected to the conductive member 130, and the second electrode 142 is electrically connected to the end wall of the closed end 112; the control board 150 is arranged on the side of the insulating sealing ring 120 away from the accommodating cavity 160, and the control circuit of the control board 150 (not shown in the figure) is electrically connected to the conductive member 130 and the cylindrical shell 110 respectively.

[0048] In this embodiment, the first electrode 141 is welded to the conductive member 130 , and the second electrode 142 is welded to the end wall of the closed end 112 .

[0049] It is understood that the control board 150 is provided with a control circuit that can play a role in voltage regulation and grounding. The control circuit is electrically connected to the conductive member 130, thereby achieving electrical connection with the first electrode 141. The control circuit is electrically connected to the cylindrical shell 110, thereby achieving electrical connection with the second electrode 142.

[0050] The insulating sealing ring 120 has a certain degree of elastic deformation. The inner edge of the insulating sealing ring 120 is sleeved over the conductive member 130, while the outer edge is circumferentially squeezed by a first annular wall 113 protruding from the inner sidewall of the cylindrical housing 110. This ensures a tight fit with the inner sidewall of the cylindrical housing 110 and the outer sidewall of the conductive member 130, thereby reliably sealing the accommodating cavity 160. The battery cell 140 is accommodated within the accommodating cavity 160, with the control board 150 located on the side of the insulating sealing ring 120 away from the accommodating cavity 160. Specifically, the insulating sealing ring 120 isolates the battery cell 140 from the control board 150, while the conductive member 130 electrically connects the control board 150 to the first electrode 141 of the battery cell 140. It will be appreciated that to prevent short circuits, the conductive member 130 is isolated from the cylindrical housing 110 by the insulating sealing ring 120, i.e., the conductive member 130 does not contact the cylindrical housing 110.

[0051] As can be seen, the sealing performance of the accommodating cavity 160 where the battery cell 140 is located is no longer affected by the assembly structure of the control board 150 and the cylindrical housing 110. Even if the assembly structure of the control board 150 and the cylindrical housing 110 is deformed, the electrolyte in the accommodating cavity 160 will not leak. In other words, the cylindrical battery 100 provided in this embodiment has the characteristics of better sealing performance and a more reliable sealing structure.

[0052] It is understandable that the battery cell 140 can be either a soft-pack battery cell 140 or a rolled battery cell, and the present disclosure does not specifically limit the type of the battery cell 140 .

[0053] In order to ensure reliable sealing between the inner edge of the insulating sealing ring 120 and the conductive member 130 , in this embodiment, a matching annular groove 131 is provided on the side wall of the conductive member 130 , and the inner edge of the insulating sealing ring 120 is circumferentially embedded in the matching annular groove 131 .

[0054] In practice, a first contact plate 132 is disposed at the end of the conductive member 130 that is adjacent to the accommodating cavity 160 . The first electrode 141 is welded to the first contact plate 132 . A second contact plate 133 is disposed at the end of the conductive member 130 that is distal to the accommodating cavity 160 . The adjacent sidewalls of the first and second contact plates 132 and 133 form a mating annular groove 131 with the outer wall of the conductive member 130 .

[0055] When the inner edge of the insulating sealing ring 120 is embedded in the mating annular groove 131, the insulating sealing ring 120 and the conductive member 130 form an interference fit. The inner sidewall of the insulating sealing ring 120 is in contact with the outer sidewall of the conductive member 130. The sidewalls of the insulating sealing ring 120 in the thickness direction are in contact with the first and second contact plates 132 and 133, respectively. Thus, the insulating sealing ring 120 is in contact with the conductive member 130 over a large area, ensuring a tight seal between the inner edge of the insulating sealing ring 120 and the conductive member 130.

[0056] In this embodiment, the first annular wall 113 is formed by rolling the outer wall of the cylindrical shell 110. A first roll groove 114 is formed on the outer wall of the open end 111 at a position corresponding to the first annular wall 113. In practice, the outer wall of the open end 111 is circumferentially rolled, resulting in a circumferential depression on the outer wall and a circumferential protrusion on the inner wall. This forms the first roll groove 114 on the outer surface and the first annular wall 113 on the inner wall.

[0057] To facilitate assembly, in this embodiment, the molding process of the first ring wall 113 is equivalent to the mating process between the first ring wall 113 and the insulating sealing ring 120. Specifically, after the insulating sealing ring 120 is sleeved over the conductive member 130 and inserted into the open end 111 of the cylindrical housing 110, the outer wall of the open end 111 is rolled, with the rolling position corresponding to the outer circumference of the insulating sealing ring 120. During the rolling process, the raised first ring wall 113 on the inner wall of the open end 111 simultaneously presses the insulating sealing ring 120. Once the first ring wall 113 is molded, the mating of the insulating sealing ring 120 and the first ring wall 113 is also completed.

[0058] In this embodiment, to enhance the sealing effect, the cross-sectional width of the first annular wall 113 is smaller than the thickness of the insulating sealing ring 120. This ensures that when the insulating sealing ring 120 is elastically deformed by the compression of the first annular wall 113, the first annular wall 113 fits within the insulating sealing ring 120. In other words, in this state, the end wall and both sidewalls in the width direction of the first annular wall 113 mate with the deformed, curved outer wall of the insulating sealing ring 120, increasing the mate area and achieving better sealing performance.

[0059] It is understood that the first power connection plate 132 is configured to electrically connect to the first electrode 141 of the battery cell 140, and the second power connection plate 133 is configured to electrically connect to the control board 150. In this embodiment, the second power connection plate 133 is a flat plate. In other embodiments, the structure of the second power connection plate 133 can be adaptively adjusted to accommodate the power connection configuration on the control board 150.

[0060] For example, please refer to Figure 5, which shows a schematic diagram of the connection structure between the insulating sealing ring 120, the conductive member 130, and the cylindrical housing 110 in another embodiment of the present disclosure. In the embodiment shown in Figure 3, the structure of the second power connection plate 133 of the conductive member 130 is different. In this embodiment, the second power connection plate 133 is provided with a mating recess 1331, which is configured to plug into a protrusion provided on the control board 150, thereby improving the reliability of the electrical connection between the conductive member 130 and the control board 150.

[0061] Referring again to Figure 6, FIG6 illustrates a schematic diagram of the connection structure between the insulating seal ring 120, the conductive member 130, and the cylindrical housing 110 in yet another embodiment of the present disclosure. In the embodiment shown in FIG4, a mating post 1332 protrudes from the second power connection plate 133. The mating post 1332 is integrally formed with the second power connection plate 133. The mating post 1332 is configured to engage with a recessed structure provided on the control board 150, thereby improving the reliability of the electrical connection between the conductive member 130 and the control board 150.

[0062] Continuing with Figures 1 and 2 , in this embodiment, the control board 150 includes an insulating base 152, a pin 153, and a first charge and discharge electrode 151. The pin 153 and the first charge and discharge electrode 151 are respectively projecting from opposite sides of the insulating base 152 in the thickness direction. The first charge and discharge electrode 151 is located on the side of the insulating base 152 away from the accommodating cavity 160, while the pin 153 is located on the side of the insulating base 152 closer to the accommodating cavity 160. The pin 153 is electrically connected to the first charge and discharge electrode 151 via the control circuit. The pin 153 abuts the second power connection plate 133, thereby establishing an electrical connection between the first charge and discharge electrode 151 and the first electrode 141 of the battery cell 140.

[0063] A second charge / discharge electrode 118 is provided on the end wall of the closed end 112. The second charge / discharge electrode 118 is electrically connected to the second electrode 142, that is, the second charge / discharge electrode 118 is electrically connected to the control circuit of the control board 150. In practice, the second electrode 142 and the second charge / discharge electrode 118 are welded.

[0064] In actual applications, the cylindrical battery 100 is connected to the external circuit through the first charge and discharge electrode 151 and the second charge and discharge electrode 118 to achieve charging or power supply. It is understandable that the specific polarity of the first charge and discharge electrode 151 and the second charge and discharge electrode 118 is determined according to the specific polarity of the first electrode 141 and the second electrode 142 of the battery cell 140. For example, when the first electrode 141 is a positive electrode and the second electrode 142 is a negative electrode, the first charge and discharge electrode 151 is a positive output electrode and the second charge and discharge electrode 118 is a negative output electrode; when the first electrode 141 is a negative electrode and the second electrode 142 is a positive electrode, the first charge and discharge electrode 151 is a negative output electrode and the second charge and discharge electrode 118 is a positive output electrode.

[0065] To assemble the control board 150, in this embodiment, a second annular wall 115 protrudes from the inner sidewall of the open end 111 of the cylindrical housing 110. The open end 111 is folded inward to form a stopper 116. The second annular wall 115 is further away from the closed end 112 than the first annular wall 113. The side of the second annular wall 115 away from the first annular wall 113 and the stopper 116 together clamp the insulating base 152 of the control board 150. A conductive portion (not shown) is formed on the edge of the insulating base 152, which abuts the second annular wall 115. The control circuit on the insulating base 152 is electrically connected to the cylindrical housing 110 via the conductive portion.

[0066] In this embodiment, the second ring wall 115 is formed by rolling the outer wall of the cylindrical shell 110 in the same manner as the first ring wall 113, that is, a second roller groove 117 is formed on the outer wall of the opening end 111 at a position corresponding to the second ring wall 115.

[0067] During the actual assembly process, after the insulating seal ring 120 is assembled, the cylindrical housing 110 is rolled to form the second annular wall 115. The control board 150 is then inserted into the cylindrical housing 110 through the open end 111 and abutted against the second annular wall 115. The pre-set molding position of the second annular wall 115 ensures that the ejector pins 153 of the control board 150 precisely abut against the second contact plate 133 of the conductive member 130. Next, the open end 111 is folded inward to form a stopper 116. The stopper 116 defines a channel 1161 through which the first charge and discharge electrodes 151 extend. This allows the insulating base 152 to be clamped and secured on opposite sides of the thickness direction by the second annular wall 115 and the stopper 116. The first charge and discharge electrodes 151 extend out of the cylindrical housing 110 through the channel 1161 defined by the stopper 116.

[0068] It can be understood that the circumferential compression of the insulating sealing ring 120 by the first annular wall 113 achieves a primary seal for the accommodating cavity 160, while the clamping of the insulating base 152 by the second annular wall 115 and the stopper 116 achieves a secondary seal for the accommodating cavity 160, thereby further reliably sealing the accommodating cavity 160. Furthermore, even if the assembly structure of the control board 150 and the cylindrical housing 110 deforms, causing the secondary seal to fail, the primary seal can still prevent electrolyte leakage.

[0069] In summary, the cylindrical battery 100 provided by the embodiment of the present disclosure has the characteristics of better sealing and more stable and reliable sealing structure.

[0070] The present disclosure also provides a battery pack comprising the aforementioned cylindrical battery 100. It is understood that the battery pack also includes conventional battery pack components such as a housing, aluminum bars, and a collection harness, which are not described in detail in this embodiment. This battery pack exhibits all the benefits of the cylindrical battery, namely, improved sealing and a more reliable sealing structure.

[0071] In addition, an embodiment of the present disclosure further provides an electrical device, which is equipped with the aforementioned cylindrical battery 100. Benefiting from the beneficial effects of the cylindrical battery 100, the electrical device provided by this embodiment has the characteristics of better sealing and a more reliable sealing structure. In another embodiment, the electrical device can also be configured with the aforementioned battery pack. The above is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure. Industrial Applicability

[0072] In summary, the present disclosure provides a cylindrical battery, a battery pack, and an electrical device, which have the characteristics of better sealing effect and more reliable sealing structure.

Claims

1. A cylindrical battery, characterized in that: It includes a cylindrical shell, an insulating seal ring, a conductive member, a battery cell and a control board, wherein the cylindrical shell has an open end and a closed end opposite to each other, and the insulating seal ring is accommodated in the cylindrical shell and sleeved on the outer side wall of the conductive member; A first ring wall is convexly provided on the inner side wall of the open end, and the first ring wall circumferentially squeezes the insulating sealing ring to deform, and a sealed accommodating cavity is formed between the insulating sealing ring and the closed end; The battery cell is accommodated in the accommodation cavity, and the battery cell has a first electrode and a second electrode with opposite polarities, the first electrode is electrically connected to the conductive member, and the second electrode is electrically connected to the end wall of the closed end; The control board is arranged on a side of the insulating sealing ring away from the accommodating cavity, and a control circuit of the control board is electrically connected to the conductive member and the cylindrical shell respectively.

2. The cylindrical battery according to claim 1, characterized in that: A matching annular groove is arranged on the side wall of the conductive member, and the inner edge of the insulating sealing ring is circumferentially embedded in the matching annular groove.

3. The cylindrical battery according to claim 2, characterized in that: A first connection plate is provided at one end of the conductive member close to the accommodating cavity, the first electrode is connected to the first connection plate, a second connection plate is provided at one end of the conductive member away from the accommodating space, and two side walls of the first connection plate and the second connection plate close to each other and the outer side wall of the conductive member form the matching annular groove.

4. The cylindrical battery according to claim 3, characterized in that: The second power board is provided with a matching recess, and the control board is provided with a protruding structure plugged into the matching recess.

5. The cylindrical battery according to claim 3, characterized in that: The second power board is provided with a protruding matching column, and the control board is provided with a recessed structure plugged into the matching column.

6. The cylindrical battery according to any one of claims 1 to 5, characterized in that: A first roller groove is formed on the outer side wall of the opening end at a position corresponding to the first ring wall.

7. The cylindrical battery according to any one of claims 1 to 6, characterized in that: The control board is provided with a first charge-discharge electrode, and the first charge-discharge electrode is electrically connected to the conductive member.

8. The cylindrical battery according to claim 7, characterized in that: A second ring wall is protruding from the inner side wall of the open end, and the second ring wall is farther away from the closed end than the first ring wall; The opening end is folded inwardly to form a stopper, and the side of the second ring wall away from the first ring wall and the stopper jointly clamp the control board.

9. The cylindrical battery according to claim 8, characterized in that: The stopper forms a channel, and the first charge and discharge electrode extends out of the cylindrical shell through the channel.

10. The cylindrical battery according to claim 8, characterized in that: A second roller groove is formed on the outer side wall of the opening end at a position corresponding to the second annular wall.

11. The cylindrical battery according to claim 8, characterized in that: The control board includes an insulating substrate, which is clamped by the second ring wall and the stopper, and the first charge and discharge electrode is convexly arranged on a side of the insulating substrate away from the second ring wall.

12. The cylindrical battery according to claim 11, characterized in that: The control board also includes a pin, which is arranged on a side of the insulating substrate close to the second ring wall. The pin is electrically connected to the first charge and discharge electrode through a control circuit arranged on the insulating substrate, and the pin is connected to the conductive member.

13. The cylindrical battery according to any one of claims 1 to 12, characterized in that: A second charge-discharge electrode is disposed on the end wall of the closed end, and the second charge-discharge electrode is electrically connected to the second electrode.

14. A battery pack, characterized in that: Comprising a cylindrical battery as described in any one of claims 1-13.

15. An electrical equipment, characterized in that: Includes the cylindrical battery as described in any one of claims 1-13, or, includes the battery pack as described in claim 14.

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