Cylindrical battery and electric equipment
By connecting directly through the battery cell support and the first ear of the battery cell in the cylindrical battery, the problem of high production and assembly costs in the prior art is solved, and the improvement of low production costs, simple assembly and safety is achieved.
Patent Information
- Application Number
- CN202421205947.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-29
AI Technical Summary
Existing cylindrical batteries are costly and complex in the production and assembly process, mainly due to the use of gaskets and metal adapters.
A cylindrical battery is designed, and the thimble of the control board is directly connected to the first ear of the battery cell through the battery cell bracket, eliminating the configuration of the sealing gasket and metal adapter, and simplifying the assembly process.
Reduces production costs, simplifies assembly processes, making cylindrical batteries easier to manufacture and use while improving safety.
Smart Images
Figure CN222673156U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a cylindrical battery and electrical equipment. Background Art
[0002] At present, cylindrical batteries on the market usually have a sealing gasket and a metal adapter penetrating the sealing gasket arranged between the control board and the battery cell. The power connection part on the control board is electrically connected to the positive electrode tab of the battery cell through the metal adapter.
[0003] For this type of cylindrical battery, the arrangement of sealing gaskets and metal adapters results in excessively high production costs and a cumbersome and complicated assembly process. Utility Model Content
[0004] The utility model aims to provide a cylindrical battery, which has the characteristics of low production cost and easy assembly.
[0005] Another object of the utility model is to provide an electrical device which has the characteristic of low use cost.
[0006] The embodiment of the utility model provides a technical solution:
[0007] A cylindrical battery, comprising a cylindrical shell, a control board, a battery holder and a battery cell, wherein the cylindrical shell has an open end and a closed end opposite to each other, the control board, the battery holder and the battery cell are all arranged inside the cylindrical shell and arranged in sequence from the open end to the closed end, and the battery holder is used to axially limit the battery cell;
[0008] A ejector pin is protruding from one side of the control board close to the battery cell holder, a clearance through hole is penetrated through the battery cell holder, the battery cell has a first pole ear and a second pole ear with opposite polarities, the ejector pin passes through the clearance through hole and is connected to the first pole ear, and the second pole ear is connected to the end wall of the closed end.
[0009] In an optional embodiment, a limiting ring wall is protruding from the inner side wall of the open end, and the limiting ring wall is located between the control board and the battery cell holder, and the side of the limiting ring wall close to the closed end abuts against the side of the battery cell holder away from the closed end.
[0010] In an optional embodiment, a ring groove is formed by rolling on the outer side wall of the opening end at a position corresponding to the limiting ring wall.
[0011] In an optional embodiment, the battery cell support and the end wall of the closed end respectively abut against two opposite ends of the battery cell in the axial direction.
[0012] In an optional embodiment, the control board includes an insulating base, the open end is folded inward to form a stop portion, the side of the limiting ring wall away from the closed end and the stop portion jointly clamp the insulating base, and the ejector pin is protruding on the side of the insulating base close to the closed end.
[0013] In an optional embodiment, a first electrode is protruding from the side of the insulating substrate away from the closed end, the first electrode is electrically connected to the ejector pin via a control circuit disposed inside the insulating substrate, the stop portion forms an avoidance channel, and the first electrode extends through the avoidance channel to extend out of the open end.
[0014] In an optional embodiment, a heat dissipation and pressure relief cavity is formed between the control board and the battery cell holder, and the battery cell holder has a heat dissipation and pressure relief channel, which extends from a side of the battery cell holder close to the battery cell to a side close to the control board and is connected to the heat dissipation and pressure relief cavity.
[0015] In an optional embodiment, there are multiple heat dissipation and pressure relief channels, and the multiple heat dissipation and pressure relief channels are circumferentially distributed in sequence with the clearance through hole as the center.
[0016] In an optional embodiment, a second electrode is disposed on the end wall of the closed end, and the second electrode is electrically connected to the second electrode tab.
[0017] The utility model also provides an electrical device, including the cylindrical battery, the cylindrical battery including a cylindrical shell, a control board, a battery cell holder and a battery cell, the cylindrical shell having an open end and a closed end opposite to each other, the control board, the battery cell holder and the battery cell are all arranged inside the cylindrical shell, and are arranged in sequence from the open end to the closed end, the battery cell holder is used for axially limiting the battery cell; a ejector pin is protrudingly provided on one side of the control board close to the battery cell holder, a clearance through hole is penetrated through the battery cell holder, the battery cell has a first pole ear and a second pole ear with opposite polarities, the ejector pin passes through the clearance through hole to be connected to the first pole ear, and the second pole ear is connected to the end wall of the closed end.
[0018] Compared with the prior art, the cylindrical battery provided by the utility model has a control board whose ejector pin directly passes through the battery holder and is connected to the first pole ear of the battery, eliminating the need for additional sealing gaskets and metal adapters, thereby reducing production costs. In addition, the assembly operation of the sealing gasket and the cylindrical shell, as well as the assembly operation of the metal adapter on the sealing gasket, are eliminated, thereby simplifying the assembly operation of the cylindrical battery. Therefore, the cylindrical battery provided by the utility model has the following beneficial effects: lower production costs and convenient assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative work.
[0020] Figure 1 A schematic diagram of the structure of a cylindrical battery provided in an embodiment of the utility model;
[0021] Figure 2 A cross-sectional view of a cylindrical battery provided in an embodiment of the utility model;
[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the battery cell bracket.
[0023] Icons: 100-cylindrical battery; 110-cylindrical shell; 111-open end; 112-closed end; 113-limiting ring wall; 114-rolling ring groove; 115-stopper; 116-second electrode; 120-control board; 121-thrust pin; 122-insulating substrate; 123-first electrode; 130-battery cell bracket; 131-allowance through hole; 132-heat dissipation and pressure relief channel; 140-battery cell; 141-first pole ear; 142-second pole ear; 150-heat dissipation and pressure relief chamber. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] 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, further definition and explanation thereof is not required in subsequent drawings.
[0027] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.
[0028] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.
[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings.
[0031] Example
[0032] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. 1 is a schematic diagram of the structure of a cylindrical battery 100 provided in this embodiment. Figure 2 A cross-sectional view of the cylindrical battery 100 is shown.
[0033] The cylindrical battery 100 provided in this embodiment includes a cylindrical shell 110, a control board 120, a battery cell holder 130 and a battery cell 140. The cylindrical battery 100 has an open end 111 and a closed end 112 opposite to each other. The control board 120, the battery cell holder 130 and the battery cell 140 are all arranged inside the cylindrical shell 110 and arranged in sequence from the open end 111 to the closed end 112.
[0034] It is understandable that the cell holder 130 is an insulator, and the cell holder 130 plays the role of axially limiting the cell 140. In this embodiment, the cell holder 130 and the end wall of the closed end 112 respectively abut against the opposite ends of the cell 140 in the axial direction, thereby fixing the cell 140 in the cylindrical shell 110 and preventing the cell 140 from axially shaking relative to the cylindrical shell 110.
[0035] The battery cell 140 has a first pole ear 141 and a second pole ear 142. The first pole ear 141 is located at an end of the battery cell 140 axially away from the closed end 112, and the second pole ear 142 is located at an end of the battery cell 140 axially close to the closed end 112. A ejector pin 121 is protruding from one side of the control board 120 close to the battery cell holder 130. The ejector pin 121 passes through the battery cell holder 130 and is connected to the first pole ear 141. The second pole ear 142 is connected to the end wall of the closed end 112.
[0036] It is understandable that the polarity of the first pole lug 141 and the second pole lug 142 may not be specifically limited. If the first pole lug 141 is a negative pole lug, the second pole lug 142 is a positive pole lug; if the first pole lug 141 is a positive pole lug, the second pole lug 142 is a negative pole lug.
[0037] In fact, the control board 120 includes an insulating base 122 and a control circuit arranged inside the insulating base 122. The ejector pin 121 is protruded from the side of the insulating base 122 close to the battery cell holder 130. The ejector pin 121 is electrically connected to the control circuit inside the insulating base 122. A first electrode 123 is provided on the side of the insulating base 122 away from the battery cell holder 130. The first electrode 123 is electrically connected to the control circuit.
[0038] The periphery of the insulating substrate 122 is also provided with an electrical connection portion, through which the cylindrical shell 110 is electrically connected to the control circuit. The control circuit plays the role of voltage regulation and grounding, and is electrically connected to the first pole lug 141 through the ejector pin 121, and is electrically connected to the second pole lug 142 through the electrical connection portion and the cylindrical shell 110.
[0039] The polarity of the first electrode 123 corresponds to the first pole tab 141, and the closed end 112 of the cylindrical shell 110 is provided with a second electrode 116, which is electrically connected to the second pole tab 142, and its polarity corresponds to the second pole tab 142. In other words, if the first pole tab 141 is a positive pole tab and the second pole tab 142 is a negative pole tab, the first electrode 123 is the positive pole of the cylindrical battery 100, and the second electrode 116 is the negative pole of the cylindrical battery 100; if the first pole tab 141 is a negative pole tab and the second pole tab 142 is a positive pole tab, the first electrode 123 is the negative pole of the cylindrical battery 100, and the second electrode 116 is the positive pole of the cylindrical battery 100.
[0040] Please refer to Figure 3 , Figure 3 FIG. 1 is a schematic structural diagram of a battery cell support 130 .
[0041] In order to further simplify the assembly operation, in this embodiment, the ejector pin 121 abuts against the first pole ear 141, and the second pole ear 142 abuts against the closed end 112. In addition, the battery cell holder 130 is provided with a clearance through hole 131 for the ejector pin 121 to pass through, and the clearance through hole 131 is aligned with the first pole ear 141 of the battery cell 140. In the actual assembly process, after the battery cell 140 and the battery cell holder 130 are sequentially loaded into the cylindrical shell 110, the ejector pin 121 is aligned and passed through the clearance through hole 131 to achieve abutment with the first pole ear 141. It should be noted that in this embodiment, in order to prevent the ejector pin 121 from directly abutting against the first pole ear 141 and causing damage to the first pole ear 141, a metal sheet is pre-welded on the first pole ear 141, and the ejector pin 121 actually abuts against the metal sheet directly.
[0042] For fixing the battery cell holder 130, in the present embodiment, a limiting ring wall 113 is protruded from the inner wall of the opening end 111, and the limiting ring wall 113 is located between the control board 120 and the battery cell holder 130, and the side of the limiting ring wall 113 close to the closed end 112 abuts against the side of the battery cell holder 130 away from the closed end 112.
[0043] In fact, the limiting ring wall 113 is formed by circumferentially rolling the outer surface of the cylindrical shell 110, that is, a rolling ring groove 114 is formed on the outer side wall of the opening end 111 at a position corresponding to the limiting ring wall 113.
[0044] In practical applications, after the battery cell 140 and the battery cell holder 130 are sequentially loaded into the battery shell, the outer surface of the cylindrical shell 110 is circumferentially rolled on the side of the battery cell holder 130 away from the battery cell 140, so that the cylindrical shell 110 forms a limiting ring wall 113 on the side of the battery cell holder 130 away from the battery cell 140. By selecting the rolling position and the rolling mold, the formed limiting ring wall 113 is pressed against the side of the battery cell holder 130 away from the battery cell 140, so that the battery cell holder 130 and the closed end 112 of the cylindrical shell 110 can fix the battery cell 140 axially.
[0045] Regarding the fixation of the control board 120, in this embodiment, the open end 111 is folded inward to form a stop portion 115, and the side of the limiting ring wall 113 away from the closed end 112 and the stop portion 115 jointly clamp the insulating base 122, and the stop portion 115 forms an avoidance channel, and the first electrode 123 extends out of the open end 111 through the avoidance channel.
[0046] In the actual assembly process, after the battery cell 140 and the battery cell holder 130 are installed and the limiting ring wall 113 is formed, the insulating base 122 is placed into the cylindrical shell 110 from the opening end 111 in a posture where the ejector pin 121 is aligned with the clearance through hole 131, and the side of the limiting ring wall 113 away from the battery cell holder 130 supports the insulating base 122. In this case, the peripheral edge of the opening end 111 is folded inward to form a stopper 115, and the stopper 115 is made to abut against the side of the insulating base 122 away from the limiting ring wall 113, so as to clamp and fix the insulating base 122 together with the limiting ring wall 113, and the assembly operation is convenient and quick.
[0047] In this embodiment, due to the presence of the limiting ring wall 113, a heat dissipation and pressure relief cavity 150 is formed between the insulating base 122 and the battery cell holder 130. The battery cell holder 130 has a heat dissipation and pressure relief channel 132. The heat dissipation and pressure relief channel 132 extends from the side of the battery cell holder 130 close to the battery cell 140 to the side close to the control board 120, and is connected to the heat dissipation and pressure relief cavity 150.
[0048] It is understandable that in actual applications, the heat generated by the battery cell 140 can reach the heat dissipation and pressure relief chamber 150 through the heat dissipation and pressure relief channel 132, and then be transferred to the cylindrical shell 110, which can prevent accidents caused by overheating of the battery cell 140. In addition, the heat dissipation and pressure relief channel 132 and the heat dissipation and pressure relief chamber 150 can also accommodate the high-pressure gas released by the battery cell 140 to prevent the cylindrical battery 100 from rupturing.
[0049] In order to improve the efficiency and uniformity of heat dissipation and pressure relief, in this embodiment, there are multiple heat dissipation and pressure relief channels 132, and the multiple heat dissipation and pressure relief channels 132 are circumferentially distributed in sequence with the giving way through hole 131 as the center.
[0050] In summary, the cylindrical battery 100 provided in this embodiment eliminates the need for a sealing gasket and a metal adapter, and is provided with an easily installed battery cell holder 130 , which has the characteristics of low production cost, easy assembly and high safety.
[0051] In addition, this embodiment also provides an electric device, which is equipped with the aforementioned cylindrical battery 100. Benefiting from the beneficial effects of the cylindrical battery 100, the electric device provided by this embodiment has the characteristics of low use cost and high safety.
[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A cylindrical battery, characterized in that: The invention comprises a cylindrical shell (110), a control board (120), a battery holder (130) and a battery (140), wherein the cylindrical shell (110) has an open end (111) and a closed end (112) opposite to each other, the control board (120), the battery holder (130) and the battery (140) are all arranged inside the cylindrical shell (110) and arranged in sequence from the open end (111) to the closed end (112), and the battery holder (130) is used for axially limiting the battery (140); A ejector pin (121) is protrudingly provided on one side of the control board (120) close to the battery cell support (130); a clearance through hole (131) is penetrated through the battery cell support (130); the battery cell (140) has a first pole ear (141) and a second pole ear (142) with opposite polarities; the ejector pin (121) passes through the clearance through hole (131) and is connected to the first pole ear (141); and the second pole ear (142) is connected to the end wall of the closed end (112).
2. The cylindrical battery according to claim 1, characterized in that: A limiting ring wall (113) is protrudingly provided on the inner side wall of the open end (111), and the limiting ring wall (113) is located between the control board (120) and the battery holder (130), and a side of the limiting ring wall (113) close to the closed end (112) abuts against a side of the battery holder (130) away from the closed end (112).
3. The cylindrical battery according to claim 2, characterized in that: A rolling ring groove (114) is formed on the outer side wall of the opening end (111) at a position corresponding to the limiting ring wall (113).
4. The cylindrical battery according to claim 2, characterized in that: The battery cell support (130) and the end wall of the closed end (112) respectively abut against two opposite ends of the battery cell (140) in the axial direction.
5. The cylindrical battery according to claim 2, characterized in that: The control board (120) comprises an insulating base (122), the open end (111) is folded inward to form a stopper (115), the side of the limiting ring wall (113) facing away from the closed end (112) and the stopper (115) jointly clamp the insulating base (122), and the ejector pin (121) is protruding from a side of the insulating base (122) close to the closed end (112).
6. The cylindrical battery according to claim 5, characterized in that: A first electrode (123) is protrudingly provided on a side of the insulating base (122) away from the closed end (112); the first electrode (123) is electrically connected to the ejector pin (121) via a control circuit arranged inside the insulating base (122); the stopper (115) forms an escape channel; the first electrode (123) passes through the escape channel and extends out of the open end (111).
7. The cylindrical battery according to claim 1, characterized in that: A heat dissipation and pressure relief cavity (150) is formed between the control board (120) and the battery cell support (130); the battery cell support (130) is provided with a heat dissipation and pressure relief channel (132); the heat dissipation and pressure relief channel (132) extends from a side of the battery cell support (130) close to the battery cell (140) to a side close to the control board (120), and is in communication with the heat dissipation and pressure relief cavity (150).
8. The cylindrical battery according to claim 7, characterized in that: The number of the heat dissipation and pressure relief channels (132) is multiple, and the multiple heat dissipation and pressure relief channels (132) are sequentially distributed circumferentially with the clearance through hole (131) as the center.
9. The cylindrical battery according to claim 1, characterized in that: A second electrode (116) is provided on the end wall of the closed end (112), and the second electrode (116) is electrically connected to the second electrode tab (142).
10. An electrical device, characterized in that: It comprises a cylindrical battery (100) as claimed in any one of claims 1 to 9.