Conductive terminal, battery circuit breaking device, battery pack and electric device

Abstract

The utility model provides a conductive terminal, a battery circuit breaking device, a battery pack and an electric device. The conductive terminal comprises a fixed seat, a conductive clamping piece and a bracket, a conductive clamping piece is connected to the first side of the fixing seat, the clamping piece comprises paired elastic pieces, and the clamping piece is used for clamping the plug-in; the bracket is connected to the second side of the fixed seat; the support comprises a floating structure and a connecting piece, the floating structure is connected between the fixing base and the connecting piece, the floating structure is bent in the first direction and the second direction, the floating structure comprises a first bending angle alpha with the minimum angle, and the first bending angle alpha meets the condition that alpha is larger than or equal to 30 degrees, and alpha is larger than or equal to 30 degrees. The stress at the first bending angle alpha can be reduced, and the damage to the conductive terminal is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical connection, and specifically provides a conductive terminal, a battery disconnect device, a battery pack, and an electrical device. Background Art

[0002] In the prior art, a mating plug is inserted into a conductive terminal to establish electrical contact. To ensure proper insertion of the mating plug into the conductive terminal, the mounting position error between the conductive terminal and the plug must be minimal or zero; otherwise, the mating plug will not fit into the conductive terminal and establish an electrical connection. However, in practice, some error often exists in the mounting position of the conductive terminal and the plug, making it difficult to achieve high precision and significantly complicating the mating operation.

[0003] In order to solve the problem of difficult matching, our company uses conductive terminals with a floating structure, but there is a problem of damage to the conductive terminals during the floating process. Summary of the Invention

[0004] In order to solve the problem of conductive terminal damage during floating, the present invention provides a conductive terminal for electrically connecting to a plug-in, the conductive terminal including a fixed seat, a conductive clamping member and a bracket; the conductive clamping member is connected to the first side of the above-mentioned fixed seat, the above-mentioned clamping member includes a pair of spring sheets, and the above-mentioned clamping member is used to clamp the above-mentioned plug-in; the bracket is connected to the second side of the above-mentioned fixed seat; the above-mentioned bracket includes a floating structure and a connecting member, the above-mentioned floating structure is connected between the above-mentioned fixed seat and the above-mentioned connecting member, the above-mentioned floating structure is bent along the first direction and the second direction, the above-mentioned floating structure includes a first bending angle α with the smallest angle, and the above-mentioned first bending angle α satisfies: α≥30°.

[0005] During the process of plugging the conductive terminal and the plug-in, the clamping part relies on the floating of the floating structure to produce a position change to ensure the plug-in. The floating structure bends along the first direction and the second direction and includes a first bending angle α with the smallest angle. Therefore, during the floating process of the floating structure, the stress at the first bending angle α is the largest. Setting the first bending angle α to α≥30° can reduce the stress at the first bending angle α and reduce damage to the conductive terminal.

[0006] In an optional technical solution of the present invention, the floating structure further includes a second bending angle β, and the second bending angle β and the first bending angle α satisfy: β>α.

[0007] In an optional technical solution of the present invention, the bending radius R1 of the first bending angle α, the bending radius R2 of the second bending angle β, and the thickness H of the floating structure satisfy the following conditions: R1 ≤ 2H, R2 ≤ 2H. The larger the bending radius, the more difficult it is to control the accuracy of the bending angle during processing. Setting both the bending radius R1 and the bending radius R2 to less than twice the thickness H of the floating structure can improve the accuracy of the bending angle.

[0008] In an optional technical solution of the present invention, the bending radius R1 of the first bend angle α, the bending radius R2 of the second bend angle β, and the thickness H of the floating structure satisfy the following conditions: H ≤ R1 ≤ 2H, and R1 > R2. Because the first bend angle α is smaller than the second bend angle β, the stress at the first bend angle α is greater than the stress at the second bend angle β. Setting H ≤ R1 ≤ 2H and R1 > R2 can improve the accuracy of the bend angles while further reducing the stress at the smallest first bend angle α.

[0009] In an optional technical solution of the present invention, the floating structure includes a first curved section, a second curved section, and a third curved section. The first curved section extends obliquely upward from the fixing base, the second curved section extends obliquely downward from the end point of the first curved section, and the third curved section extends obliquely downward from the end point of the second curved section. The angle between the first and second curved sections is the first bending angle α, and the angle between the second and third curved sections is the second bending angle β. The arrangement of the first, second, and third curved sections allows for greater floating space and flexibility for the conductive terminal.

[0010] In an optional technical solution of the present invention, the bending radius R1 of the first bending angle α satisfies: 0.5mm≤R1≤1mm.

[0011] In an optional technical solution of the present invention, the length L of the first bending section satisfies: 2.6 mm ≤ L ≤ 4.3 mm. Setting the length of the first bending section within the above value range can reduce the moment at the first bending angle α.

[0012] In an optional technical solution of the present invention, the difference between the length of the second bend section and the length of the third bend section is less than or equal to 40% of the length of the third bend section. Setting the length of the second bend section to be approximately equal to the length of the third bend section allows for greater floating range and flexibility in the Z and X directions of the bracket.

[0013] In an optional technical solution of the present invention, a hollow structure is provided on the floating structure, and the hollow structure allows the conductive terminal to float in the third direction.

[0014] In an optional technical solution of the present invention, the fixing base is a rectangular structure, the paired springs are connected to the two first sides of the fixing base, and the floating structure is connected to the two second sides of the fixing base. A through hole is provided in the center of the fixing base for the insertion of the plug-in. If the arrangement direction of the two springs in the paired springs is defined as the clamping direction, this solution can increase the floating amplitude perpendicular to the clamping direction.

[0015] In an optional technical solution of the present invention, the connector includes a first connector and a second connector, and the length of the second connector along the Z axis is greater than the length of the first connector along the Z axis. When the conductive terminal is installed in the relevant component, the second connector first contacts the installation position, thereby providing a positioning function.

[0016] In an optional technical solution of the present invention, the width of the second connecting member is smaller than the width of the first connecting member.

[0017] In an optional technical solution of the present invention, the above-mentioned connecting member includes two above-mentioned first connecting members and two above-mentioned second connecting members, and the two above-mentioned second connecting members are arranged diagonally, which is more convenient for stable positioning and avoids twisting of the conductive terminal.

[0018] In an optional technical solution of the present invention, the conductive terminals include multiple pairs of spring clips. When the plug-in is deflected in the XY plane, if a pair of spring clips with a larger width along the X-axis is inserted, the contact area between the plug-in and the pair of spring clips is very small. Providing multiple pairs of spring clips with smaller widths can increase the contact area between all the spring clips and the plug-in.

[0019] In an optional technical solution of the present invention, the above-mentioned spring fragment includes a first spring segment and a second spring segment, the above-mentioned first spring segment connects the above-mentioned fixing seat and the above-mentioned second spring segment, and the width of the above-mentioned first spring segment is smaller than the width of the above-mentioned second spring segment.

[0020] The present invention also provides a battery circuit breaker device, which includes the conductive terminal and a plug-in. The clamping member clamps the plug-in, the plug-in is electrically connected to the conductive terminal, and the insert is welded to the conductive terminal.

[0021] The present invention also provides a battery pack, which includes the battery circuit breaker device.

[0022] The present invention also provides an electrical device, which includes the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a conductive terminal with greater stress;

[0024] Figure 2 A perspective view of an embodiment of a conductive terminal of the present invention;

[0025] Figure 3 for Figure 2 The main view;

[0026] Figure 4 for Figure 2 Schematic diagram of the conductive terminal installed on the BMU;

[0027] Figure 5 The figure is a schematic diagram of an embodiment of plugging a conductive terminal and a plug-in.

[0028] Reference numerals

[0029] Conductive terminal 100;

[0030] Fixed seat 110;

[0031] a first side 111 and a second side 112;

[0032] Clamping member / spring 120;

[0033] First bullet fragment 121, second bullet fragment 122;

[0034] Bracket 130;

[0035] floating structures 131;

[0036] A first bending section 1311, a second bending section 1312, and a third bending section 1313;

[0037] Connector 132;

[0038] A first connecting member 1321 and a second connecting member 1322;

[0039] plugin 200;

[0040] Fixed portion 210, floating portion 220, plug-in portion 230;

[0041] BMU300. DETAILED DESCRIPTION

[0042] The following describes optional embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "distance", "width", "thickness", "up", "down", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0044] In the description of this utility model, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0045] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0046] like Figure 1 As shown, the top bending angle of the floating structure of the conductive terminal is too small, and the stress at the top bending angle is too large, which will cause damage to the floating structure and difficulty in the normal floating of the conductive terminal. Figure 2-5 As shown, the present invention provides a conductive terminal 100, which is used to electrically connect to a plug-in 200. The conductive terminal 100 includes a fixed base 110, a conductive clamping member 120 and a bracket 130, wherein the clamping member 120 is fixed to the first side 111 of the fixed base 110, and the bracket 130 is fixed to the second side 112 of the fixed base 110. The clamping member 120 includes a pair of springs for clamping the plug-in 200. The bracket 130 includes a floating structure 131 and a connecting member 132, wherein the floating structure 131 is connected between the fixed base 110 and the connecting member 132, and the floating structure 131 is bent along a first direction and a second direction (Z axis and X axis). The floating structure 131 includes a first bending angle α with a minimum angle, and the first bending angle α is ≥30°. During the plug-in connection between the conductive terminal 100 and the plug-in 200, the clamping member 120 changes position due to the floating structure 131, ensuring plug-in connection with the plug-in 200. The floating structure 131 bends along the first and second directions and includes a first bending angle α with the smallest angle. Therefore, during the floating process, the stress at the first bending angle α is the greatest. Setting the first bending angle α to α ≥ 30° can reduce the stress at the first bending angle α and minimize damage to the conductive terminal 100. Optionally, the floating structure 131 also includes a second bending angle β, where the second bending angle β and the first bending angle α satisfy the following: β>α. In this embodiment, only the first bending angle α and the second bending angle β are specified. It will be understood that the number of bending angles can be determined based on actual needs.

[0047] like Figure 3As shown, in an optional embodiment of the present invention, the bending radius R1 of the first bending angle α, the bending radius R2 of the second bending angle β, and the thickness H of the floating structure 131 satisfy the following conditions: R1 ≤ 2H, R2 ≤ 2H. The larger the bending radius, the more difficult it is to control the accuracy of the bending angle during processing. Setting both the bending radius R1 and the bending radius R2 to less than twice the thickness H of the floating structure 131 can improve the accuracy of the bending angle.

[0048] In an optional embodiment of the present invention, the bending radius R1 of the first bending angle α, the bending radius R2 of the second bending angle β, and the thickness H of the floating structure 131 further satisfy the following conditions: H ≤ R1 ≤ 2H, R1 > R2. Since the first bending angle α is smaller than the second bending angle β, the stress at the first bending angle α is greater than the stress at the second bending angle β. Setting H ≤ R1 ≤ 2H and R1 > R2 can improve the accuracy of the bending angle while further reducing the stress at the minimum first bending angle α. Optionally, R1 = 2H and R2 = H can be set. Optionally, the bending radius R1 of the first bending angle α satisfies the following conditions: 0.5 mm ≤ R1 ≤ 1 mm.

[0049] In an optional embodiment of the present invention, Figure 3 As shown, the floating structure 131 includes a first bend section 1311, a second bend section 1312, and a third bend section 1313. The first bend section 1311 extends obliquely upward from the fixed base 110, the second bend section 1312 extends obliquely downward from the end point of the first bend section 1311, and the third bend section 1313 extends obliquely downward from the end point of the second bend section 1312. The angle between the first bend section 1311 and the second bend section 1312 is the first bend angle α, and the angle between the second bend section 1312 and the third bend section 1313 is the second bend angle β. The arrangement of the first bend section 1311, the second bend section 1312, and the third bend section 1313 can provide greater floating space and flexibility for the conductive terminal 100 while reducing space along the Z axis. Optionally, the length L of the first bend section 1311 satisfies the following conditions: 2.6 mm ≤ L ≤ 4.3 mm. Setting the length of the first bend section 1311 within the aforementioned range can reduce the moment at the first bend angle α while ensuring a large floating space for the floating structure 131. Parallel to the X-axis, the first bend section 1311 and the second bend section 1312 extend away from the fixed base 110, while the third bend section 1313 extends toward the fixed base 110. These three bend sections form a quadrilateral-like structure, facilitating floating of the conductive terminal 100 while avoiding excessive X-axis space occupation.

[0050] In an optional embodiment of the present invention, Figure 3As shown, the difference between the length of the second bending section 1312 and the length of the third bending section 1313 is less than or equal to 40% of the length of the third bending section 1313. Setting the length of the second bending section 1312 and the length of the third bending section 1313 to be approximately equal allows the bracket to float more freely in the Z and X directions.

[0051] In an optional embodiment of the present invention, Figure 2 As shown, a hollow structure is provided on the floating structure 131. The hollow structure allows the conductive terminal 100 to float in the third direction (ie, the Y-axis).

[0052] In an optional embodiment of the present invention, Figure 2 As shown, the fixed base 110 is a rectangular structure, with a pair of springs connected to the two first sides 111 of the fixed base 110, and a floating structure 131 connected to the two second sides 112 of the fixed base 110. A through hole is provided in the middle of the fixed base 110 for inserting the plug-in 200. If the arrangement direction of the two springs in the pair of springs is defined as the clamping direction (parallel to the Y axis), this solution can increase the floating amplitude perpendicular to the clamping direction (i.e., the X direction). Of course, the paired springs and the floating structure can also be connected to the same side of the fixed base, and this application does not impose any restrictions.

[0053] In an optional embodiment of the present invention, Figure 2-4 As shown, the connector 132 includes a first connector 1321 and a second connector 1322, wherein the length of the second connector 1322 along the Z axis is greater than the length of the first connector 1321 along the Z axis. When the conductive terminal 100 is installed in a related component such as the BMU 300 (Battery Management Unit), the first connector 1321 first contacts the installation location, thereby providing a positioning function. To facilitate the positioning and guiding functions of the first connector 1321, the width of the second connector 1322 can be configured to be smaller than the width of the first connector 1321. Optionally, the connector 132 includes two first connectors 1321 and two second connectors 1322, wherein the two second connectors 1322 are arranged diagonally. When the two diagonally arranged second connectors 1322 are inserted into the installation location, large floating torsions of the conductive terminal 100 can be avoided, thereby facilitating more stable positioning.

[0054] In an optional embodiment of the present invention, Figure 2 and Figure 5 As shown, the conductive terminal 100 includes a plurality of pairs of springs 120 (i.e., clamping members). When the plug-in 200 deflects in the XY plane, if a pair of springs with a larger width along the X axis is plugged in, the contact area between the plug-in 200 and the pair of springs is very small. Providing multiple pairs of springs with smaller widths can increase the contact area between all the springs and the plug-in. Specifically, as Figure 3 As shown, the spring piece 120 includes a first spring segment 121 and a second spring segment 122. The first spring segment 121 connects the fixing seat 110 and the second spring segment 122. The width of the first spring segment 121 is smaller than that of the second spring segment 122, which allows the spring piece 120 to swing more flexibly.

[0055] The present invention also provides a battery circuit breaker device, which includes the above-mentioned conductive terminal 100 and plug-in 200, the clamping member clamps the plug-in 200, the plug-in 200 is electrically connected to the conductive terminal 100, and the plug-in 200 and the conductive terminal 100 are welded. Specifically, Figure 5 As shown, the plug-in 200 includes a fixed portion 210, a floating portion 220, and a plug-in portion 230. The fixed portion 210 is used to secure the plug-in to a component such as a relay. The floating portion 220 has a curved structure. The floating principle is similar to that of the conductive terminal 100 and will not be further described here. The plug-in portion 230, under the action of the floating portion 220, can compensate for positional errors, thereby achieving plug-in connection with the clamping member of the conductive terminal 100.

[0056] The present invention also provides a battery pack, which includes the battery circuit breaker device.

[0057] The present invention also provides an electrical device including the aforementioned battery pack. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. The spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0058] Thus far, the technical solutions of the present invention have been described in conjunction with the optional embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A conductive terminal for electrically connecting to a plug-in, characterized in that: include: Fixed seat; a conductive clamping member connected to the first side of the fixing seat, the clamping member including a pair of spring pieces, and the clamping member being used to clamp the plug-in; a bracket connected to the second side of the fixing base; The bracket includes a floating structure and a connecting member, the floating structure is connected between the fixing seat and the connecting member, the floating structure bends along a first direction and a second direction, and the floating structure includes a first bending angle α with the smallest angle, and the first bending angle α satisfies: α≥30°.

2. The conductive terminal according to claim 1, wherein: The floating structure further includes a second bending angle β, and the second bending angle β and the first bending angle α satisfy: β>α.

3. The conductive terminal according to claim 2, wherein: The bending radius R1 of the first bending angle α, the bending radius R2 of the second bending angle β, and the thickness H of the floating structure satisfy the following conditions: R1≤2H, R2≤2H.

4. The conductive terminal according to claim 3, wherein: The bending radius R1 of the first bending angle α, the bending radius R2 of the second bending angle β, and the thickness H of the floating structure satisfy the following conditions: H≤R1≤2H, R1>R2.

5. The conductive terminal according to claim 4, wherein: The floating structure includes a first bending section, a second bending section and a third bending section. The first bending section extends obliquely upward from the fixed seat, and the second bending section extends obliquely downward from the end point of the first bending section; the third bending section extends obliquely downward from the end point of the second bending section; the angle between the first bending section and the second bending section is the first bending angle α, and the angle between the second bending section and the third bending section is the second bending angle β.

6. The conductive terminal according to claim 5, wherein: The bending radius R1 of the first bending angle α satisfies: 0.5 mm ≤ R1 ≤ 1 mm.

7. The conductive terminal according to claim 5, characterized in that , the length L of the first bending section satisfies: 2.6mm≤L≤4.3mm.

8. The conductive terminal according to claim 5, wherein , the difference between the length of the second bending segment and the length of the third bending segment is less than or equal to 40% of the length of the third bending segment.

9. The conductive terminal according to claim 5, wherein , a hollow structure is provided on the floating structure.

10. The conductive terminal according to claim 5, characterized in that The fixing seat is a rectangular structure, the paired springs are respectively connected to the two first sides of the fixing seat, and the floating structure is connected to the two second sides of the fixing seat; A through hole is provided in the middle of the fixing seat, and the through hole is used for the plug-in to pass through.

11. A battery circuit breaker device, characterized in that: The invention comprises an insert and a conductive terminal according to any one of claims 1 to 10, wherein the clamping member clamps the insert, and the insert is electrically connected to the conductive terminal.

12. A battery pack, characterized in that: Comprising the battery disconnect device as claimed in claim 11.

13. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 12.

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