Contact scale cleaning device for electric vehicle battery

Abstract

The utility model relates to the technical field of electric vehicle power management, and discloses a contact scale cleaning device for an electric vehicle battery. Comprising an operation installation disc, two contact friction arc-shaped blocks which are installed on the operation installation disc and used for cleaning scale deposit of a switch-on contact set, and two contact friction arc-shaped blocks which are installed on the operation installation disc and used for cleaning scale deposit of switch-on contacts. Wherein the two contact friction arc-shaped blocks are symmetrically arranged on the two sides of the mode adjusting disc and make contact with the switching-on contacts at the two ends respectively, the two contact friction arc-shaped blocks are symmetrically arranged between the two switching-on contact sets and make separable contact with the two switching-on contact sets respectively, and the operation installation disc and the mode adjusting disc are coaxially arranged and can rotate relatively independently. Therefore, the two contact friction arc-shaped blocks are connected with the contact group, and the two contact friction arc-shaped blocks and the switch contacts can rotate relatively, so that scales generated by oxidation and spark corrosion on the switch contacts can be cleaned through friction, and the influence on the use effect and the service life of the battery pack due to reduction of an effective contact surface of electric contact is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle power management technology, specifically to a device for cleaning the contact deposits of electric vehicle batteries. Background Technology

[0002] Two-wheeled electric vehicles are now widely used in the market, and their core power supply has always been a focus of continuous improvement in the industry. For example, abnormal batteries in the battery pack can be disconnected to prevent the continued use of abnormal batteries from affecting the performance of the entire battery pack and even affecting driving safety. However, in order to achieve this disconnection function, electric vehicles inevitably need to add some new switch contacts, etc.

[0003] For example, the patent solutions with publication numbers CN205051425U and CN206012358U both added other electronic components and switch contacts, etc. During frequent switching, these electrical contact switch contacts are prone to oxidation and spark corrosion, and scale buildup on the contact switches, resulting in uneven contact surfaces, reduced effective electrical contact, and increased resistance. This may not only cause heat generation problems, but also affect the charging and discharging effect of the battery pack and shorten its lifespan. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a device for cleaning the contact deposits of electric vehicle batteries. This device can clean the deposits on switch contacts caused by oxidation and spark corrosion through friction, thereby preventing the reduction of the effective contact area of ​​the switch contacts and thus affecting the performance and lifespan of the battery pack.

[0005] To solve the above problems, the present invention adopts the following solution:

[0006] A device for cleaning contact deposits in electric vehicle batteries is installed between the switch contacts of multiple batteries. Each switch contact includes two sets of contact heads electrically connected to two battery packs on either side, and a mode adjustment disc positioned between the two contact head sets. Multiple contact heads are symmetrically arranged in a circumferential direction at both ends of the mode adjustment disc. The device includes an operating mounting disc, two contact friction arc blocks mounted on the operating mounting disc for cleaning deposits from the contact head sets, and two contact friction arc blocks mounted on the operating mounting disc for cleaning deposits from the contact heads. Friction arc blocks are symmetrically arranged on both sides of the mode adjustment disk and respectively contact the contact points at both ends. Two contact friction arc blocks are symmetrically arranged between two sets of contact point groups and can be separably contacted with the two sets of contact points. The contact friction arc blocks are provided with multiple through holes corresponding to the contact point groups. The operation mounting disk is provided with connecting through holes that are coaxial with the through holes and correspond one-to-one. The operation mounting disk and the mode adjustment disk are coaxially arranged and can rotate relatively independently so that the two contact friction arc blocks and the contact point groups, and the two contact point friction arc blocks and the contact points can all rotate relative to each other to achieve friction cleaning.

[0007] In the above solution, rotating the operating mounting plate drives the two contact friction arc blocks to rotate relative to the contact assembly, and drives the two contact point friction arc blocks to rotate relative to the contact point. This friction cleans the scale accumulated on the contact assembly and contact point due to oxidation and spark corrosion, preventing the effective electrical contact area of ​​the contact assembly and contact point from being reduced, which would affect the current transmission and ensure the performance and service life of the battery pack.

[0008] Preferably, the contact friction arc block includes a first friction surface that contacts the energizing contact group, and the contact friction arc block includes a second friction surface that contacts the energizing contact.

[0009] Preferably, the surface roughness Ra values ​​of the first friction surface and the second friction surface are 0.8-1.2 μm.

[0010] The above two settings are used to achieve friction between the contact head group and the contact point respectively, and to ensure the cleaning effect through precise control of surface roughness.

[0011] Preferably, the operating mounting plate is symmetrically designed, including two mounting discs. Each mounting disc is equipped with a contact friction arc block and a contact point friction arc block. A cylindrical mounting space for mounting a mode adjustment disc is formed between the two mounting discs. The mode adjustment disc is coaxially mounted with the two mounting discs, and connecting through holes are symmetrically opened on the two mounting discs.

[0012] The above setup integrates the mode adjustment dial for switching battery pack operating modes with the contact friction arc blocks and contact point friction arc blocks for cleaning accumulated dirt, resulting in a more rational spatial arrangement.

[0013] Preferably, the mounting disc has an annular groove, and both the contact friction arc block and the contact point friction arc block are installed in the annular groove, with the contact point friction arc block passing through the annular groove to contact the connection point.

[0014] The above configuration further illustrates the installation structure of the contact friction arc block and the contact point friction arc block in the mounting disk. This integrated installation structure design makes the installation more compact and further ensures a reasonable spatial arrangement.

[0015] Preferably, the depth of the annular groove matches the thickness of the contact friction arc block and the contact point friction arc block.

[0016] This further optimizes the structural layout of the scale cleaning device.

[0017] Preferably, the two mounting discs are connected by protruding connecting blocks at their edges, and the protruding connecting blocks are provided with pulling ropes that can pull the two mounting discs to rotate.

[0018] The above configuration allows for an integrated operation and installation panel. By pulling the rope and the protruding connecting block, both installation discs can be rotated simultaneously, thereby enabling simultaneous friction cleaning of the two contact assemblies and the two contact points. This operation is convenient and the cleaning is highly efficient.

[0019] Preferably, the inner wall of the connecting hole is chamfered, and the end of the connecting contact assembly near the connecting contact point is spherical.

[0020] The above settings ensure that the contact can slide smoothly into or out of the contact hole, and that the contact friction arc block rotates smoothly and without obstruction relative to the contact group.

[0021] The beneficial effects of this utility model are as follows:

[0022] This invention features a contact friction arc block and a contact point friction arc block, both of which can rotate relative to the switch contacts. This allows the deterioration caused by oxidation and spark corrosion of the switch contact assembly and contact points to be cleaned by friction, preventing a reduction in the effective electrical contact area that could affect current transmission and ensuring the battery pack's performance and lifespan.

[0023] This invention integrates the contact friction arc block and the contact point friction arc block into the same operating mounting plate, which not only achieves precise coaxial installation of the contact friction arc block and the contact point friction arc block, but also allows the contact friction arc block and the contact point friction arc block to rotate synchronously by simply driving the operating mounting plate, making operation convenient and cleaning efficient. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the internal structure of the present invention in conjunction with a battery pack;

[0025] Figure 2 This is a schematic diagram of the partial disassembly structure of the present invention when it is used in conjunction with the mode adjustment dial;

[0026] Figure 3 This is a schematic diagram of the structure of the contact friction arc block and the contact point friction arc block of this utility model.

[0027] Reference numerals: 11 connecting contact group, 12 mode adjustment disk, 121 connecting contact, 20 operating mounting disk, 21 mounting disc, 211 connecting through hole, 212 annular groove, 22 mounting space, 23 protruding connecting block, 24 pulling rope, 30 contact friction arc block, 31 first friction surface, 32 connecting hole, 40 contact friction arc block, 41 second friction surface. Detailed Implementation

[0028] Example 1: Reference Figures 1-3 This embodiment provides a device for cleaning the contact deposits of electric vehicle batteries, mainly used in the electric vehicle field. It is installed between the switch contacts of multiple batteries. The switch contacts include two sets of contact groups 11 that are electrically connected to the battery packs on both sides, and a mode adjustment disk 12 disposed between the two contact groups 11. Each contact group 11 has four contact contacts. Multiple contact points 121 are symmetrically arranged at both ends of the mode adjustment disk 12. The multiple contact points 121 are evenly distributed along the circumferential direction of both ends of the mode adjustment disk 12. The multiple contact points 121 form several sets of gear contact combinations. Different gear contact combinations correspond to different working modes of the battery pack. By rotating the mode adjustment disk, different gear contact combinations can be electrically connected to the two contact groups.

[0029] The descaling cleaning device mainly consists of the following components: an operating mounting plate 20, two contact friction arc blocks 30 mounted on the operating mounting plate 20 for cleaning the descaling of the contact assembly 11, and two contact friction arc blocks 40 mounted on the operating mounting plate 20 for cleaning the descaling of the contact point 121. These friction components are symmetrically mounted on both sides of the operating mounting plate 20. Among them, the two contact friction arc blocks 22 are symmetrically arranged on both sides of the mode adjustment plate 12 and respectively contact the contact points 121 at both ends. The two contact friction arc blocks 30 are symmetrically arranged between the two sets of contact assemblies 11 and can be separably contacted by the two sets of contact assemblies 11. The contact friction arc blocks 30 are also designed with four through holes 32 corresponding one-to-one with the contact assemblies 11. The operating mounting plate 20 is provided with connecting through holes 211 that are coaxial with the through holes 32 and correspond one-to-one with the through holes 32.

[0030] Both the contact friction arc block 30 and the contact friction arc block 40 are made of tungsten carbide material with a hardness of not less than HRA90. The key technical parameters of the contact friction arc block 30 and the contact friction arc block 40 are as follows:

[0031] First friction surface 31: Located on the contact friction arc block 30, in contact with the contact assembly 11, with a surface roughness Ra value of 0.8-1.2μm;

[0032] Second friction surface 41: It is provided on the contact friction arc block 40 and in contact with the contact 121, with a surface roughness Ra value of 0.8-1.2μm;

[0033] All friction contact surfaces are treated with anti-oxidation and have a service life of ≥10,000 reciprocating cycles. The first friction surface 31 rotates relative to the contact assembly 11 and the second friction surface 41 rotates relative to the contact point 121 by rotating the mounting plate 20, thereby performing friction cleaning. Alternatively, the contact point 121 can be rotated relative to the contact friction arc block 40 by rotating the mode adjustment plate 12 to achieve friction cleaning.

[0034] The design of this cleaning device effectively solves the problem of scale buildup on traditional switch contacts caused by environmental oxidation, electrical spark corrosion, and other factors. Through automatic cleaning during regular periods or when switching contacts, the surface roughness of the contact can be maintained below Ra 1.6μm.

[0035] In terms of contact interface optimization, the inner wall of the through hole 32 adopts a 15° chamfer design (depth 0.5-0.8mm) and is anodized. The end of the contact contact group 11 near the contact point 121 adopts a spherical design and is plated with a 3-5μm gold layer, controlling the coefficient of friction between 0.1-0.15 and the operating force below 5N, ensuring a smooth and reliable switching process.

[0036] To achieve a compact integration of the mode adjustment disc 12 and the descaling device, the operating mounting disc 20 adopts a symmetrical design. Its core structure includes two precision injection-molded mounting discs 21, forming a cylindrical mounting space 22 (diameter 82-85mm, axial clearance 0.2-0.3mm) between them for mounting the mode adjustment disc 12. The inner wall of the space has an annular sealing groove (1.5mm deep, 2mm wide) for installing a sealing ring. The connecting through holes 211 on the mounting disc 21 are precision-machined to maintain high-precision coaxiality with the four connecting holes 32. The contact friction arc block 30 and the contact point friction arc block 40 are integrated within the same mounting disc 21 using locating pins and pressure plates. This design not only achieves precise coaxial installation of the two friction components but also provides IP54 protection for the connecting contact 121 through a lip seal, effectively preventing the deposition of environmental contaminants (particle size >10μm). Furthermore, the synchronous rotation of the two friction components (speed ratio 1:1) can be achieved by operating the mounting plate 20 with a single point drive (torque 1.2-1.5 N•m), which improves the efficiency and reliability of cleaning deposits.

[0037] The mounting disc 21 employs an integrated design for its refined structure. The annular groove 212 precisely matches the thickness of the contact friction arc block 30 and the contact friction arc block 40, with a clearance controlled within 0.05-0.1mm. Both arc segments are precision-machined arc shapes and are precisely installed within the annular groove 212 via positioning bosses (2mm high). The contact friction arc block 40 passes through the annular groove 212 via a precision-machined through hole (diameter tolerance H7), maintaining a working clearance of 0.2-0.3mm with the contact point 121. This integrated design allows for a more compact installation of the contact friction arc block 30 and the contact friction arc block 40.

[0038] The mechanical operation design of the mounting plate 20 also includes a quick-switching mechanism. Protruding connecting blocks 23 443 are connected to the edges of the two mounting discs 21 by high-strength bolts (strength grade 8.8). These protruding connecting blocks 443 are designed with precision positioning grooves for fixing the wire rope, and are connected to the high-strength tension rope 24 via a special clamp. The guiding system of the tension rope 24 uses a guide wheel assembly supported by sealed bearings (6000-2RS) to ensure smooth transmission and extend service life. When the manual control scheme is selected, the tension rope 24 is connected to the starting operation component in the front of the vehicle; when the electric control scheme is adopted, a small servo motor (torque 0.2-0.4 N•m) can be configured to achieve automated control, with a system response time ≤200ms.

[0039] The battery switching and descaling process in this embodiment is as follows:

[0040] By pulling the pull rope 24 through the start operation component at the front of the vehicle (this component is not shown in the figure), the installation operation panel 30 is rotated, which in turn drives the contact friction arc block 30 and the contact friction arc block 40 to rotate. The contact friction arc block 30 rotates relative to the contact assembly 11, and the contact friction arc block 40 rotates relative to the contact 121, thus achieving friction cleaning of the dirt accumulated in the contact assembly 11 and the contact 121.

[0041] The contact point 121 can also be cleaned by friction when switching the battery pack working mode. Specifically, the mode adjustment disk 12 is rotated by other operating parts in the front of the vehicle to switch different gear contact combinations and connect them to the contact head group 11. While rotating the mode adjustment disk 12, the contact point 121 on the mode adjustment disk 12 rotates relative to the contact arc friction block 22, thereby achieving friction cleaning of the dirt accumulated on the contact point 121.

[0042] This embodiment is mainly optimized for two-wheeled electric vehicle application scenarios. Under the premise of ensuring safety and reliability, all technical parameters can be reasonably adjusted to adapt to different application needs.

Claims

1. A device for cleaning the contact deposits of an electric vehicle battery, installed between the switch contacts of multiple batteries, wherein the switch contacts include two sets of contact groups (11) electrically connected to two battery packs respectively, and a mode adjustment disk (12) disposed between the two contact groups (11), wherein multiple contact points (121) are symmetrically arranged at both ends of the mode adjustment disk (12) in a circumferential direction; characterized in that, The system includes an operating mounting plate (20), two contact friction arc blocks (30) mounted on the operating mounting plate (20) for cleaning the scale buildup of the contact assembly (11), and two contact friction arc blocks (40) mounted on the operating mounting plate (20) for cleaning the scale buildup of the contact points (121). The two contact friction arc blocks (40) are symmetrically arranged on both sides of the mode adjustment plate (12) and respectively contact the contact points (121) at both ends. The two contact friction arc blocks (30) are symmetrically arranged between the two sets of contact assemblies (11) and respectively contact the two... The contact assembly (11) can be separated. The contact friction arc block (30) is provided with multiple through holes (32) corresponding to the contact assembly (11). The operation mounting plate (20) is provided with connecting through holes (211) that are coaxial with the through holes (32) and correspond one-to-one. The operation mounting plate (20) and the mode adjustment plate (12) are coaxially arranged and can rotate relatively independently so that the two contact friction arc blocks (30) and the contact assembly (11), and the two contact point friction arc blocks (40) and the contact point (121) can all rotate relatively to achieve friction cleaning.

2. The contact descaling device for electric vehicle batteries according to claim 1, characterized in that, The contact friction arc block (30) includes a first friction surface (31) which contacts the contact assembly (11), and the contact friction arc block (40) includes a second friction surface (41) which contacts the contact (121).

3. The contact descaling device for electric vehicle batteries according to claim 2, characterized in that, The surface roughness Ra values ​​of the first friction surface (31) and the second friction surface (41) are 0.8-1.2 μm.

4. The contact descaling device for electric vehicle batteries according to claim 1, characterized in that, The operating mounting plate (20) is symmetrically designed and includes two mounting discs (21). Each mounting disc (21) is equipped with a contact friction arc block (30) and a contact friction arc block (40). A cylindrical mounting space (22) for mounting a mode adjustment disc (12) is formed between the two mounting discs (21). The mode adjustment disc (12) is coaxially mounted with the two mounting discs (21). The connecting through holes (211) are symmetrically opened on the two mounting discs (21).

5. The contact descaling device for electric vehicle batteries according to claim 4, characterized in that, The mounting disc (21) has an annular groove (212), and the contact friction arc block (30) and the contact friction arc block (40) are both installed in the annular groove (212), and the contact friction arc block (40) passes through the annular groove (212) to contact the connection contact (121).

6. The contact descaling device for electric vehicle batteries according to claim 5, characterized in that, The depth of the annular groove (212) matches the thickness of the contact friction arc block (30) and the contact friction arc block (40).

7. The contact descaling device for electric vehicle batteries according to claim 4, characterized in that, The two mounting discs (21) are connected by protruding connecting blocks (23) at their edges. The protruding connecting blocks (23) are provided with pulling ropes (24) that can pull the two mounting discs (21) to rotate.

8. The contact descaling device for electric vehicle batteries according to claim 1, characterized in that, The inner wall of the connecting hole (32) is chamfered, and the end of the connecting contact group (11) near the connecting contact (121) is spherical.

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