Protective plate assembly and battery
By setting limiting grooves and limiting teeth on the side wall of the circuit board, the problem of insufficient welding area between the protection board and the electrode tab is solved, a stable connection between the conductive parts and the circuit board is achieved, and the welding quality of the battery is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA ELECTRONICS CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-09
AI Technical Summary
In existing batteries, the welding area between the protection board and the tab is relatively small, which makes the nickel block prone to tilting during the reflow process, resulting in poor welding between the tab and the protection board and affecting battery quality.
Anti-skewing structures, such as limiting grooves and limiting teeth, are set on the sidewalls of the circuit board to increase the connection area between the conductive components and the circuit board. The design of limiting grooves and limiting teeth prevents the conductive components from skewing and ensures a stable connection.
This effectively avoids the problem of poor electrode tab soldering, reduces the spot welding defect rate of the battery production line, and improves the welding quality of the battery.
Smart Images
Figure CN224342474U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery structure, and in particular to a protection board assembly and a battery. Background Technology
[0002] In existing batteries, the conventional structure involves soldering the large surface of the protection board to the tabs using nickel sheets, but this occupies a significant area of the protection board. To address this issue, some batteries use nickel blocks to solder the sidewalls of the protection board along its thickness direction to the tabs. During the reflow process, the melting solder paste can cause the nickel blocks to tilt, resulting in gaps between the tabs and the nickel blocks during subsequent spot welding. This leads to incomplete soldering between the tabs and the protection board, affecting battery quality. Utility Model Content
[0003] The purpose of this application is to provide a protection board assembly and a battery that can increase the bonding area between the protection board and the nickel block, thereby preventing the nickel block from shifting.
[0004] This application provides a protection board assembly, including a circuit board and conductive components;
[0005] The conductive element is connected to a preset sidewall of the circuit board, and the preset sidewall is the sidewall of the circuit board in its own thickness direction.
[0006] An anti-tilting structure is provided between the conductive component and the circuit board to increase the connection area between the conductive component and the circuit board.
[0007] In the above technical solution, the anti-tilt structure further includes a limiting groove formed in the preset sidewall, the limiting groove penetrating the circuit board along the thickness direction of the circuit board;
[0008] At least a portion of the conductive element is enclosed within the limiting groove; the limiting groove is adapted to the conductive element, and the opening of the limiting groove is constricted.
[0009] In the above technical solution, the inner wall of the limiting groove is provided with a first solder pad, and the first solder pad is connected to the circumferential side wall of the conductive component.
[0010] In the above technical solution, further, in the groove depth direction of the limiting groove, the size of the conductive element is greater than or equal to the groove depth of the limiting groove.
[0011] In the above technical solution, the anti-tilt structure further includes a first positioning edge;
[0012] The length direction of the conductive element is the thickness direction of the circuit board, and at least one end of the conductive element in the length direction extends out of the limiting groove, and the end of the conductive element in the length direction extending out of the limiting groove is provided with the first positioning edge.
[0013] The circuit board has a second pad corresponding to its surface, and the second pad surrounds the circumference of the limiting groove.
[0014] The first positioning edge is connected to the second pad.
[0015] In the above technical solution, the anti-tilt structure further includes a first limiting tooth and a second limiting tooth;
[0016] The first limiting tooth is connected to the preset sidewall, and the second limiting tooth is connected to the conductive component;
[0017] The first limiting tooth and the second limiting tooth are arranged facing each other, and the first limiting tooth and the second limiting tooth are engaged with each other.
[0018] In the above technical solution, the preset sidewall is further provided with a third pad, the third pad is connected to the sidewall of the conductive component provided with the second limiting tooth, and the third pad is provided with the first limiting tooth.
[0019] In the above technical solution, the first limiting tooth is tilted upwards, and the second limiting tooth is tilted downwards.
[0020] In the above technical solution, the anti-tilt structure further includes a second positioning edge;
[0021] The bottom of the conductive component is provided with a second positioning edge; the bottom surface of the circuit board is provided with a fourth pad, and the second positioning edge is connected to the fourth pad.
[0022] This application also provides a battery including the protection board assembly described above.
[0023] Compared with the prior art, the beneficial effects of this application are as follows:
[0024] The protection board assembly provided in this application increases the connection area between the conductive component and the circuit board by setting an anti-tilt structure between the conductive component and the circuit board, thereby positioning the conductive component and preventing it from tilting. This effectively avoids the problem of poor soldering of the electrode tabs and reduces the defect rate of spot welding of battery cells on the production line.
[0025] This application also provides a battery, including the protection board assembly described in the above solution. Based on the above analysis, it is clear that the battery also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0027] Figure 1 A first structural schematic diagram of the protection plate assembly provided in this application;
[0028] Figure 2 A first structural schematic diagram of the circuit board provided in this application;
[0029] Figure 3 This is a second structural schematic diagram of the protection plate assembly provided in this application;
[0030] Figure 4 This is a schematic diagram of the second structure of the circuit board provided in this application.
[0031] In the figure: 101-Circuit board; 102-Conductive component; 103-Preset sidewall; 104-Limiting groove; 105-First pad; 106-First positioning edge; 107-Second pad; 108-First limiting tooth; 109-Second limiting tooth; 110-Third pad; 111-Second positioning edge. Detailed Implementation
[0032] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0034] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0035] Example 1
[0036] See Figures 1 to 4 As shown, the protection board assembly provided in this application includes a circuit board 101 and a conductive component 102. The circuit board 101 has functions such as overcharge protection, over-discharge protection, overcurrent protection, and short-circuit protection. When the battery voltage reaches an overcharge voltage during charging, the protection board automatically cuts off the power supply to prevent the battery from exploding; when the battery discharges to an over-discharge voltage, the protection board stops discharging to prevent the battery from becoming unusable. The conductive component 102 is specifically a nickel block or nickel sheet, possessing good conductivity, corrosion resistance, and ductility, and is used to connect the tabs to the circuit board 101.
[0037] Multiple devices are arranged on the surface of the circuit board 101. In order not to occupy the space on the surface of the circuit board 101, the tab can be connected to a preset sidewall 103 of the circuit board 101. The preset sidewall 103 is the sidewall of the circuit board 101 in its thickness direction. Specifically, it can be one side of the circuit board 101 in its width direction or one side of the circuit board 101 in its length direction. This application describes the preferred embodiment using the side in its width direction as the preset sidewall. Optionally, the thickness of the conductive element 102 is greater than the thickness of the circuit board 101, so that the top of the conductive element 102 protrudes from the surface of the circuit board 101. When the tab is connected to the conductive element 102, the tab can be connected to the top of the conductive element 102 and the sidewall of the conductive element 102 away from the circuit board 101, increasing the connection area between the tab and the conductive element 102.
[0038] The circuit board 101 is generally thin, resulting in a small connection area between the circuit board 101 and the conductive component 102. During the reflow process, the conductive component 102 is prone to tilting, affecting the soldering quality. Therefore, an anti-tilting structure is provided between the conductive component 102 and the circuit board 101 to increase the connection area between the conductive component 102 and the circuit board 101, thereby positioning the conductive component 102, preventing it from tilting, effectively avoiding the problem of poor soldering of the electrode tabs, and reducing the defect rate of spot welding of battery cells on the production line.
[0039] In the optional solutions of this embodiment, such as Figure 1 and Figure 2As shown, the anti-slant structure includes a limiting groove 104 formed in the preset sidewall 103, the limiting groove 104 extending through the circuit board 101 along the thickness direction of the circuit board 101; at least a portion of the conductive element 102 is enclosed in the limiting groove 104; the limiting groove 104 is adapted to the conductive element 102, and the opening of the limiting groove 104 is constricted.
[0040] Optionally, the inner wall of the limiting groove 104 is provided with a first solder pad 105, which is connected to the circumferential sidewall of the conductive component 102.
[0041] In this embodiment, when connecting the circuit board 101 to the conductive element 102, the conductive element 102 can be placed within a limiting groove 104 formed in the side wall. On one hand, the inner wall of the limiting groove 104 surrounds the circumference of the conductive element 102, and the inner wall of the limiting groove 104 is provided with a first pad 105 to connect to the circumferential side wall of the conductive element 102, thereby increasing the connection area between the circuit board 101 and the conductive element 102. On the other hand, as... Figure 1 As shown, the conductive element 102 is cylindrical and its cross-section is oval. The contour of the limiting groove 104 is correspondingly set to oval. The limiting groove 104 is adapted to the conductive element 102, and the opening of the limiting groove 104 is constricted. The inner wall of the limiting groove 104 can support and position the conductive element 102 from the circumference, thereby preventing the conductive element 102 from tilting.
[0042] It should be noted that the structure of the conductive element 102 in this application is not limited to the cylindrical shape with an oval cross section shown in the figure. It can also be set to have a circular, rectangular or other shape cross section, and the contour of the limiting groove 104 can be set accordingly.
[0043] In an optional embodiment, the size of the conductive element 102 is greater than or equal to the depth of the limiting groove 104 in the groove depth direction, so that the groove depth of the limiting groove 104 is configured to at least make the conductive element 102 flush with the groove edge of the limiting groove 104.
[0044] In this embodiment, in actual production, the electrode tab is connected to the conductive element 102 by spot welding. Since the conductive element 102 is placed within the limiting groove 104, the depth of the limiting groove 104 cannot be too large; it must at least ensure that the conductive element 102 is flush with the edge of the limiting groove 104, i.e., exposing the side surface of the conductive element 102 opposite to the groove opening, or exposing a portion of the conductive element 102. This makes it easier to connect the electrode tab to the conductive element 102.
[0045] In an optional embodiment, the anti-tilt structure further includes a first positioning edge 106; the length direction of the conductive element 102 is the thickness direction of the circuit board 101, and at least one end of the conductive element 102 extends out of the limiting groove 104, and the first positioning edge 106 is provided at the length direction end of the conductive element 102 extending out of the limiting groove 104. Specifically, as follows... Figure 1 As shown, the bottom of the conductive component 102 is provided with a first positioning edge 106; the bottom plate of the circuit board 101 is provided with a second pad 107, and the second pad 107 surrounds the circumference of the limiting groove 104; the first positioning edge 106 is connected to the second pad 107.
[0046] In this embodiment, in practical applications, a first positioning edge 106 with a width of 1 mm can be extended from the bottom of the conductive component 102, and a second pad 107 with a width of 1 mm can be provided on the bottom surface of the circuit board 101. By welding the first positioning edge 106 to the second pad 107, the conductive component 102 can be reinforced, further improving the connection strength between the conductive component 102 and the circuit board 101, and avoiding the problem of the conductive component 102 tilting.
[0047] Example 2
[0048] This embodiment also provides an anti-tilt structure, which realizes another connection scheme between the circuit board 101 and the conductive component 102. Other technical solutions in Embodiment 1 also belong to this embodiment and will not be described again.
[0049] See Figure 3 and Figure 4 As shown, in the optional scheme of this embodiment, the anti-tilt structure includes a first limiting tooth 108 and a second limiting tooth 109; the first limiting tooth 108 is connected to the preset sidewall 103, and the second limiting tooth 109 is connected to the conductive element 102; the first limiting tooth 108 and the second limiting tooth 109 are arranged facing each other, and the first limiting tooth 108 and the second limiting tooth 109 are engaged with each other.
[0050] Optionally, a third pad 110 is provided on the preset sidewall 103. The third pad 110 is connected to the sidewall of the conductive component 102 which is provided with a second limiting tooth 109, and a first limiting tooth 108 is provided at the third pad 110.
[0051] In this embodiment, the circuit board 101 and the conductive component 102 are connected by a first limiting tooth 108 and a second limiting tooth 109 that interlock with each other. A third pad 110 is provided at the first limiting tooth 108 to connect to the second limiting tooth 109 on the conductive component 102. The toothed structure effectively increases the contact area between the two, thereby increasing the connection strength. Furthermore, the first limiting tooth 108 and the second limiting tooth 109 are interlocked to make the connection between the circuit board 101 and the conductive component 102 more secure, preventing the conductive component 102 from shifting.
[0052] It should be noted that when the preset sidewall 103 is provided with a limiting groove 104, the groove wall of the limiting groove 104 is also part of the preset sidewall 103, and the first limiting tooth 108 can be connected to the groove wall of the limiting groove 104. At this time, under the action of the dual positioning structure of the first limiting tooth 108 and the second limiting tooth 109 and the limiting groove 104 that fit together, the conductive component 102 is less likely to tilt.
[0053] In the optional solutions of this embodiment, such as Figure 3 As shown, the first limiting tooth 108 is tilted upwards, and the second limiting tooth 109 is tilted downwards.
[0054] In this embodiment, specifically, the first limiting tooth 108 is tilted upward at a 45° angle, and the second limiting tooth 109 is tilted downward at a 45° angle. When the conductive component 102 is connected to the circuit board 101, the second limiting tooth 109 is inserted downward into the gap of the first limiting tooth 108, and the first limiting tooth 108 is inserted upward into the gap of the second limiting tooth 109, so that the circuit board 101 can support the conductive component 102, further increasing the connection strength between the two.
[0055] In an optional embodiment, the anti-slant structure further includes a second positioning edge 111; the bottom of the conductive component 102 is provided with a second positioning edge 111; the bottom surface of the circuit board 101 is correspondingly provided with a fourth pad, and the second positioning edge 111 is connected to the fourth pad.
[0056] In this embodiment, in practical applications, a second positioning edge 111 with a width of 1 mm can be extended from the bottom of the conductive component 102, and a fourth pad with a width of 1 mm can be provided on the bottom surface of the circuit board 101. The second positioning edge 111 and the fourth pad can be soldered to reinforce the conductive component 102, further improve the connection strength between the conductive component 102 and the circuit board 101, and avoid the problem of the conductive component 102 tilting.
[0057] Example 3
[0058] This application provides a battery in embodiment three, which includes the protection board assembly of any of the above embodiments. Therefore, it has all the beneficial technical effects of the protection board assembly of any of the above embodiments, which will not be repeated here.
[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.
Claims
1. A protective plate assembly, characterized in that, Including circuit boards and conductive components; The conductive element is connected to a preset sidewall of the circuit board, and the preset sidewall is the sidewall of the circuit board in its own thickness direction. An anti-tilting structure is provided between the conductive component and the circuit board to increase the connection area between the conductive component and the circuit board.
2. The protection plate assembly according to claim 1, characterized in that, The anti-tilt structure includes a limiting groove formed in the preset sidewall, and the limiting groove extends through the circuit board along the thickness direction of the circuit board. At least a portion of the conductive element is enclosed within the limiting groove; the limiting groove is adapted to the conductive element, and the opening of the limiting groove is constricted.
3. The protection plate assembly according to claim 2, characterized in that, The inner wall of the limiting groove is provided with a first solder pad, which is connected to the circumferential sidewall of the conductive component.
4. The protection plate assembly according to claim 2, characterized in that, In the depth direction of the limiting groove, the size of the conductive element is greater than or equal to the depth of the limiting groove.
5. The protection plate assembly according to claim 2, characterized in that, The anti-tilt structure also includes a first positioning edge; The length direction of the conductive element is the thickness direction of the circuit board, and at least one end of the conductive element in the length direction extends out of the limiting groove, and the end of the conductive element in the length direction extending out of the limiting groove is provided with the first positioning edge. The circuit board has a second pad corresponding to its surface, and the second pad surrounds the circumference of the limiting groove. The first positioning edge is connected to the second pad.
6. The protective plate assembly according to claim 1 or 2, characterized in that, The anti-tilt structure includes a first limiting tooth and a second limiting tooth; The first limiting tooth is connected to the preset sidewall, and the second limiting tooth is connected to the conductive component; The first limiting tooth and the second limiting tooth are arranged facing each other, and the first limiting tooth and the second limiting tooth are engaged with each other.
7. The protection plate assembly according to claim 6, characterized in that, The preset sidewall is provided with a third pad, the third pad is connected to the sidewall of the conductive component that is provided with the second limiting tooth, and the third pad is provided with the first limiting tooth.
8. The protection plate assembly according to claim 6, characterized in that, The first limiting tooth is inclined upwards, and the second limiting tooth is inclined downwards.
9. The protection plate assembly according to claim 6, characterized in that, The anti-tilt structure also includes a second positioning edge; The bottom of the conductive component is provided with a second positioning edge; the bottom surface of the circuit board is provided with a fourth pad, and the second positioning edge is connected to the fourth pad.
10. A battery, characterized in that, Includes the protective plate assembly as described in any one of claims 1 to 9.