Busbar and electrical equipment
By designing the busbar body and the shape of the support plate and setting a smooth transition arc extension piece on the busbar, the busbar is easily deformed or broken in large current pulse applications, and the safety and reliability of the system are improved.
Patent Information
- Application Number
- CN202422473320.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The existing busbars are prone to deformation or breaking in high current pulse applications, resulting in safety hazards.
A busbar structure is designed, including a busbar body with the same shape as the support plate, equipped with positioning holes and a smooth transition arc-shaped extension piece for connecting external power sources and reducing electrical stress.
Effectively reduce the electrical stress and deformation of the busbar and improve the safety and reliability of the system.
Smart Images
Figure CN223230130U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of electrical technology, and more specifically, relates to a busbar and an electrical device. Background Art
[0002] In high-current pulse applications, the electrodynamic forces generated by these pulses are significant. They can cause deformation or even damage to the device stack and packaging structure, leading to safety incidents. Traditional busbars typically utilize a straight-line structure for lead-out. Using this structure in high-current pulse applications can cause the busbar to bend or even break, potentially causing safety incidents.
[0003] To address this issue, a "cross" busbar structure has been proposed. This structure can reduce the electrical stress and strain caused by it to a certain extent. However, this busbar structure is still narrow at the connection with the external power busbar, making it prone to deformation and even breakage.
[0004] Therefore, it is necessary to improve the busbar structure to reduce the electrical stress on the busbar and the deformation caused by the electrical stress, and improve the safety and reliability of the system. Utility Model Content
[0005] In view of the defects of the existing technology, the purpose of this application is to provide a busbar and electrical equipment, aiming to solve the problem that the existing busbar is prone to deformation or even breakage when applied to the field of large current pulses.
[0006] To achieve the above objectives, in a first aspect, the present application provides a busbar, comprising:
[0007] A busbar body of the same shape as the support plate, provided with a first positioning hole for cooperating with the positioning hole of the crimping fixture and the positioning hole of the device to be crimped, and a second positioning hole for cooperating with the screw used in the support plate;
[0008] The extension piece is led outward from the busbar body in a smooth transition manner, and the extension piece has a symmetrical structure and is closed in an arc shape.
[0009] Preferably, the extension piece is symmetrical about a perpendicular bisector of two of the second positioning holes.
[0010] Preferably, the extension piece extends horizontally outward from the tangent point of two adjacent second positioning holes.
[0011] Preferably, the number of the extension pieces is 1 to 4.
[0012] Preferably, the radius of the first positioning hole is the same as the radius of the positioning hole of the component to be crimped.
[0013] Preferably, the radius of the second positioning hole is larger than the radius of the screw used in the support plate, so that the screw can pass through the second positioning hole without getting stuck.
[0014] Preferably, the extension piece is provided with two connection holes for electrically connecting to the positive or negative pole of an external power source.
[0015] Preferably, the connecting holes are symmetrical about a perpendicular bisector of two of the second positioning holes.
[0016] To achieve the above-mentioned object, in a second aspect, the present application provides an electrical device, comprising: two crimping fixtures, a component to be crimped, and two busbars as described in the first aspect;
[0017] The two crimping fixtures fix the components to be crimped between the two busbars by crimping;
[0018] The two busbars are used to connect the positive and negative poles of the external power supply respectively, so that the working current flows from the positive pole of the external power supply to the busbar on one side, then flows from the busbar to the device to be crimped, and then flows from the device to be crimped to the busbar on the other side, and finally flows back to the negative pole of the external power supply.
[0019] Preferably, it further comprises: two support plates, two buffer members, and a plurality of screw rods;
[0020] The support plates are located at both ends of the electrical equipment;
[0021] The buffer member is located between the support plate and the crimping fixture and is used to maintain the pressure required for crimping the device;
[0022] The screw rod passes through a support plate, two bus bars and another support plate in sequence, and both ends are fixed by nuts.
[0023] In general, the above technical solutions conceived by this application have the following beneficial effects compared with the existing technologies:
[0024] This application proposes a busbar and electrical equipment, comprising: a busbar body having the same shape as a support plate, the busbar body having a first positioning hole that mates with the positioning holes of the crimping fixture and the positioning holes of the device to be crimped, and a second positioning hole that mates with the screw used in the support plate; and an extension piece that smoothly extends outward from the busbar body, the extension piece being symmetrical and closing in an arc. Compared to a "cross" structure, this structure has a greater width at the same position, effectively reducing the electrical stress on the busbar and the deformation of the busbar structure caused by the electrical stress, thereby improving the safety and reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1This is a schematic diagram of the busbar structure provided in Example 1 of the present application, wherein (a) is a front view, (b) is an upper oblique view, and (c) is a lower oblique view.
[0026] Figure 2 This is a schematic diagram of the busbar structure with one extension piece provided in Example 2 of the present application.
[0027] Figure 3 This is a schematic diagram of the busbar structure with 3 extension plates provided in Example 3 of the present application.
[0028] Figure 4 This is a schematic diagram of the bus structure provided in Example 4 of the present application.
[0029] Figure 5 This is a schematic diagram of the electrical equipment structure provided in Example 5 of the present application.
[0030] Figure 6 1 is a simulation result diagram of a "cross" structure busbar in the prior art, wherein (a) is a stress distribution diagram and (b) is a strain distribution diagram.
[0031] Figure 7 This is a simulation result diagram of the busbar with a smooth transition extension plate structure provided in Example 5 of the present application, wherein (a) is a stress distribution diagram and (b) is a strain distribution diagram.
[0032] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:
[0033] 1-crimping fixture, 2-device to be crimped, 3-bus, 4-positioning pin, 5-support plate, 6-buffer, 7-screw, 30-bus body, 31-extension piece, 101-crimping fixture positioning hole, 201-positioning hole of device to be crimped, 301-first positioning hole, 302-second positioning hole, 303-connecting hole. DETAILED DESCRIPTION
[0034] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this application are explained and described below.
[0035] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.
[0036] The present application provides a busbar, comprising: a busbar body having the same shape as a support plate, the busbar body being provided with a first positioning hole that cooperates with the positioning hole of the crimping clamp and the positioning hole of the device to be crimped, and a second positioning hole that cooperates with the screw used by the support plate; an extension piece that is led outward from the busbar body in a smooth transition manner, the extension piece having a symmetrical structure and closed in an arc shape.
[0037] The busbar body designed in the present application has the same shape as the support plate, so that it can better adapt to the support plate and has better practicality.
[0038] Preferably, the extension piece is symmetrical about a perpendicular bisector of two of the second positioning holes.
[0039] Preferably, the extension piece extends horizontally outward from the tangent point of two adjacent second positioning holes.
[0040] Preferably, the number of the extension pieces is 1 to 4.
[0041] Preferably, the radius of the first positioning hole is the same as the radius of the positioning hole of the component to be crimped.
[0042] Preferably, the radius of the second positioning hole is larger than the radius of the screw used in the crimping fixture, so that the screw can pass through the second positioning hole without getting stuck.
[0043] Preferably, the extension piece is provided with two connection holes for electrically connecting to the positive or negative pole of an external power source.
[0044] Preferably, the connecting holes are symmetrical about a perpendicular bisector of two of the second positioning holes.
[0045] The present application also provides an electrical device, comprising: two crimping clamps, a device to be crimped and the two above-mentioned busbars; the two crimping clamps fix the device to be crimped in the middle of the two busbars by crimping; the two busbars are respectively used to connect the positive and negative poles of an external power supply, so that the working current flows from the positive pole of the external power supply to the busbar on one side, then from the busbar to the device to be crimped, and then from the device to be crimped to the busbar on the other side, and finally flows back to the negative pole of the external power supply.
[0046] Preferably, it further comprises: two support plates, two buffer members, and a plurality of screw rods;
[0047] The support plates are located at both ends of the electrical equipment;
[0048] The buffer member is located between the support plate and the crimping fixture and is used to maintain the pressure required for crimping the device;
[0049] The screw rod passes through a support plate, two bus bars and another support plate in sequence, and both ends are fixed by nuts.
[0050] Example 1
[0051] like Figure 1As shown in (a)-(c), in this embodiment, the support plate 5 used is circular, and three evenly distributed screws 7 are used. The crimping fixture positioning hole 101 is located at the center of the circle; the device 2 to be crimped is a plurality of pulse power devices connected in series. Therefore, the bus 3 includes: a bus body 30 and an extension piece 31. The bus body 30 is also circular, with the first positioning hole 301 located at the center of the bus body, and three second positioning holes 302 spaced 120° apart and distributed at the edge of the bus body; the extension piece 31 is smoothly extended outward from the bus body, and the extension piece structure is symmetrical and closed in an arc shape. In this embodiment, the bus body and the extension piece are made of the same material, both copper.
[0052] The radius of the first positioning hole 301 is the same as the radius of the positioning hole 201 of the component to be crimped; the radius of the second positioning hole 302 is larger than the radius of the screw 7 used in the support plate, so that the screw can pass through the second positioning hole without getting stuck.
[0053] The extension piece 31 is symmetrical about the perpendicular bisector of the two second positioning holes 302 and extends horizontally outward from the main body of the busbar in a smooth transition. Specifically, the extension piece 31 extends outward tangentially from the two second positioning holes 302 of the busbar main body. The maximum extension length is achieved at the intersection of the two extension lines. In this case, the extension section closes at an acute angle. However, in this embodiment, the two extension lines do not intersect, but are connected by an arc, i.e., a smooth transition. In this embodiment, the positive and negative poles of the external power supply are clamped to the extension piece of the busbar by a clip to form an electrical connection.
[0054] Example 2
[0055] like Figure 2 As shown, compared with Example 1, other designs remain unchanged. In this embodiment, two connection holes 303 for connecting to an external power bus are added to the extension piece, and the connection holes are symmetrical about the perpendicular bisector of the two second positioning holes 302 mentioned above.
[0056] Example 3
[0057] like Figure 3 As shown, compared with Example 2, other designs remain unchanged. In this embodiment, the number of extension pieces is increased from 1 to 3 to more conveniently provide other connection methods, such as parallel connection.
[0058] Example 4
[0059] like Figure 4As shown, in this embodiment, the support plate used is square, the crimping fixture positioning hole is located at the center point, and four evenly distributed screws are used; the devices to be crimped are multiple pulse power devices connected in series. Therefore, the bus body is also square, with the first positioning hole located at the center point of the bus body, and four second positioning holes spaced 90° apart and distributed at the edge of the bus body; the extension piece extends outward from the bus body in a smooth transition manner, and the extension piece has a symmetrical structure and closes in an arc shape. Two connection holes for connecting to the external power bus are punched on the extension piece, and the connection holes are symmetrical about the perpendicular bisector of the two edge positioning holes.
[0060] Example 5
[0061] like Figure 5 As shown, this embodiment uses the busbar in Example 2 as a basis to construct an electrical device, comprising: two crimping fixtures 1, a component 2 to be crimped, and the two aforementioned busbars 3; the two crimping fixtures secure the component to be crimped between the two busbars by crimping. It also includes: two support plates 5, two buffers 6, and several screws 7; the support plates 5 are located at both ends of the electrical device; the buffers 6 are located between the support plates 5 and the crimping fixtures 1 to maintain the pressure required for crimping the components; the screws 7 pass through one support plate 5, the two busbars 3, and the other support plate 5, and are secured at both ends by nuts (not shown).
[0062] Align the first positioning hole of the busbar with the positioning hole of the device to be crimped, and then pass the positioning pin 4 through the central positioning hole of the busbar, the crimping fixture and the device to be crimped, so as to achieve center alignment and positioning of the busbar with the crimping fixtures and the stack of devices to be crimped distributed on both sides thereof. The buffer 6 is located between the support plate 5 and the crimping fixture 1, and is used to maintain the pressure required for crimping the device. In this embodiment, the buffer comprises, from top to bottom, an upper gasket, four disc springs and a lower gasket. The buffer is integrally sleeved on the axis of the crimping fixture. Passing the screw 7 through a support plate 5, two buses 3 and another support plate 5 in turn can prevent horizontal rotation and displacement. Align the connection holes on the extension plate with the two holes of the external power busbar, and then screw in the screws to fix it.
[0063] First, use a press to crimp and fix multiple pulse power devices and crimping devices together, and then connect the upper and lower buses to the positive and negative poles of the external power supply through the connection holes 303. The working current can flow from the positive power bus to the bus on one side, then from the bus to the device stack, and then from the device stack to the bus on the other side, and finally flow back to the negative pole of the power supply.
[0064] like Figure 6 As shown in (a)-(b), the maximum stress on the cross-shaped busbar is about 6.005×10 -4MPa, the maximum strain is about 5.5189×10 -9 mm.
[0065] like Figure 7 As shown in (a)-(b), the maximum stress on the busbar with a smooth transition extension plate structure proposed in this application is about 2.2957×10 -5 MPa, the maximum strain is about 2.1191×10 -10 mm.
[0066] Comparing the simulation results of the two busbar structures reveals that the busbar with the smooth transition extension structure proposed in this application experiences only approximately 3.8% of the stress and strain of the cross-shaped busbar. Compared to the cross-shaped structure, both the maximum stress and strain are further reduced. This is because the proposed structure has a greater width at the same location than the cross-shaped structure, effectively reducing the electrical stress on the busbar and the resulting deformation of the busbar structure, thereby improving the safety and reliability of the entire system.
[0067] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components, or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.
[0068] In addition, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.
[0069] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after the connection. "Sliding connection" means that the two are connected to each other and can slide relative to each other after the connection. The directional terms mentioned in the embodiments of the present application, such as "top", "bottom", "inside", "outside", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying 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 embodiments of the present application.
[0070] In addition, in the embodiments of the present application, the mathematical concepts mentioned include symmetry, equality, parallelism, and perpendicularity. These limitations are all for the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and it is possible to be approximately symmetric, approximately equal, approximately parallel, or approximately perpendicular. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.
[0071] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.
Claims
1. A busbar, characterized in that: include: A busbar body of the same shape as the support plate, provided with a first positioning hole for cooperating with the positioning hole of the crimping fixture and the positioning hole of the device to be crimped, and a second positioning hole for cooperating with the screw used in the support plate; The extension piece is led outward from the busbar body in a smooth transition manner, and the extension piece has a symmetrical structure and is closed in an arc shape.
2. The busbar according to claim 1, wherein: The extension piece is symmetrical about a perpendicular bisector of two of the second positioning holes.
3. The busbar according to claim 1, wherein: The extension piece extends horizontally outward from the tangent point of two adjacent second positioning holes.
4. The busbar according to claim 1, wherein: The number of the extension pieces is 1 to 4.
5. The busbar according to claim 1, wherein: The radius of the first positioning hole is the same as the radius of the positioning hole of the component to be crimped.
6. The busbar according to claim 1, wherein: The radius of the second positioning hole is greater than the radius of the screw rod used in the support plate, so that the screw rod can pass through the second positioning hole without getting stuck.
7. The busbar according to claim 1, wherein: The extension piece is provided with two connection holes for electrically connecting to the positive pole or the negative pole of an external power source.
8. The busbar according to claim 7, wherein: The connecting holes are symmetrical about a perpendicular bisector of two of the second positioning holes.
9. An electrical device, characterized in that: include: Two crimping fixtures, components to be crimped, and two busbars according to any one of claims 1 to 8; The two crimping fixtures fix the components to be crimped between the two busbars by crimping; The two busbars are used to connect the positive and negative poles of the external power supply respectively, so that the working current flows from the positive pole of the external power supply to the busbar on one side, then flows from the busbar to the device to be crimped, and then flows from the device to be crimped to the busbar on the other side, and finally flows back to the negative pole of the external power supply.
10. The electrical device according to claim 9, wherein Also includes: Two support plates, two buffers, and several screws; The support plates are located at both ends of the electrical equipment; The buffer member is located between the support plate and the crimping fixture and is used to maintain the pressure required for crimping the device; The screw rod passes through a support plate, two bus bars and another support plate in sequence, and both ends are fixed by nuts.