Equipotential grounding structure of battery box body and processing device of equipotential grounding structure

Abstract

The utility model discloses a battery box equipotential grounding structure and a processing device, the equipotential grounding structure comprises a steel sleeve and a stainless steel sheet which are arranged on a battery box profile and are connected with each other, welding glue is arranged between the steel sleeve and the stainless steel sheet, the steel sleeve and the stainless steel sheet are welded through multi-point resistance welding, and the welding glue is arranged between the steel sleeve and the stainless steel sheet. The stability of equipotential grounding of the battery box body can be ensured, so that rusting caused by improper coating during electrophoresis is prevented; the machining device comprises a rack, a positioning tool used for positioning the battery box profile is arranged on the rack, a welding module is arranged at the position, corresponding to the upper portion of the positioning tool, of the rack, and a driving device used for driving the welding module to move in a three-dimensional space is arranged on the rack. Quick positioning and welding of the equipotential grounding structure can be achieved, and the machining efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to a battery box equipotential grounding structure and a processing device thereof. Background Art

[0002] In the field of new energy vehicles and energy storage systems, the design and manufacturing of battery enclosures face the dual challenges of electrical safety and corrosion resistance. Steel battery enclosures, in particular, often require a full-cover electrophoretic coating to enhance corrosion resistance. However, as a non-conductive material, electrophoretic coating effectively isolates corrosive media but also poses potential electrical safety hazards.

[0003] During battery pack operation, the complexity of internal electrical components and the high voltage environment present a risk of leakage. If the battery case is not effectively grounded, a dangerously high voltage could accumulate on the case surface. In this situation, anyone who accidentally touches the case faces a serious risk of electric shock, posing a significant threat to personal safety.

[0004] To eliminate this potential safety hazard and ensure the electrical safety of the battery box, grounding measures are particularly important. A proper grounding design allows leakage current to be quickly conducted to the earth through the grounding circuit, keeping the box's potential close to that of the earth. This prevents dangerous voltage buildup on the box's surface even if leakage occurs within the battery pack, significantly reducing the risk of electric shock and providing a strong guarantee for the safe operation of new energy vehicles and energy storage systems.

[0005] Therefore, the development of a battery box equipotential grounding structure and its processing equipment and welding process that can meet the anti-corrosion requirements and ensure electrical safety has become an urgent need in the current industry. Utility Model Content

[0006] The purpose of the present invention is to overcome the problems in the background technology and to propose a battery box equipotential grounding structure and a processing device thereof, which can ensure the stability of the battery box equipotential grounding to prevent rust caused by inadequate coating during electrophoresis.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a battery box equipotential grounding structure, comprising a steel sleeve and a stainless steel sheet arranged on a battery box profile and connected to each other, a welding glue being arranged between the steel sleeve and the stainless steel sheet, and the steel sleeve and the stainless steel sheet being welded by multi-point resistance welding; the resistance welding welding area is arranged at the top position of the stainless steel sheet, and a plurality of welding points in the welding area are evenly distributed around the axis, and a plurality of equipotential grounding structures are evenly distributed along the length direction of the battery box profile.

[0008] In order to further optimize the present invention, the following technical solutions may be preferably selected:

[0009] Preferably, the steel sleeve and the stainless steel sheet are coaxially arranged and have matching sizes.

[0010] A device for processing an equipotential grounding structure of a battery box includes a frame, the frame is provided with a positioning tool for positioning the battery box profile, the frame is provided with a welding module at a position corresponding to the position above the positioning tool, and the frame is provided with a driving device for driving the welding module to move in three-dimensional space.

[0011] Preferably, the driving device includes a slide movably arranged on the frame, a retractable resistance welding device is arranged downwardly on the slide, a transverse frame is arranged on the frame along the transverse direction of the slide, a longitudinal frame is arranged on the frame at positions corresponding to the two ends of the transverse frame, a longitudinal guide rail is arranged on the longitudinal frame along the longitudinal direction of the resistance welding device, a longitudinal slider cooperating with the longitudinal guide rail is arranged on the transverse frame, and a longitudinal driving mechanism for driving the transverse frame to move back and forth along the longitudinal guide rail is arranged on the longitudinal frame; a transverse guide rail is arranged on the transverse frame, the slide is arranged on the transverse guide rail, a transverse slider cooperating with the transverse guide rail is arranged on the slide, and a transverse driving mechanism for driving the slide to move back and forth along the transverse guide rail is arranged on the transverse frame.

[0012] Preferably, the positioning tool includes a supporting mechanism arranged on the frame, the supporting mechanism includes a supporting column and a positioning column arranged on the frame, the positioning column is arranged corresponding to the position of the equipotential grounding structure, the positioning column is provided with a three-petal positioner for fixing the inner wall of the steel sleeve, and a clamping mechanism is provided on the frame corresponding to the upper surface position of the battery box profile, the clamping mechanism includes a pressure plate 1 and a pressure plate 2 movably arranged on the frame, the pressure plate 1 is arranged corresponding to the upper surface of the battery box profile, and the pressure plate 2 is arranged corresponding to the equipotential grounding structure; the pressure plate 1 and the pressure plate 2 are respectively connected to a clamping reciprocating drive mechanism for driving the pressure plate 1 and the pressure plate 2 to rise and press down.

[0013] Preferably, a plurality of positioning tools are distributed on the frame in the transverse and longitudinal directions, and the plurality of positioning tools form welding tool areas with staggered distribution directions.

[0014] Preferably, the three-petal positioner includes a positioning claw arranged on the positioning column, and three positioning claws are evenly distributed around the axis. The positioning surface of the positioning claw is arc-shaped, and a slide groove is radially provided on the positioning column. A slider is provided in the slide groove, and the positioning claw is provided on the slider. The frame is provided with a positioning drive mechanism for driving the three positioning claws to retract / expand.

[0015] The beneficial effects of the battery box equipotential grounding structure and its processing device are mainly reflected in the following aspects:

[0016] 1) Improved grounding stability: By combining a steel sleeve with a stainless steel sheet, supplemented by welding glue and multi-point resistance welding technology, the stability and reliability of the battery box's equipotential grounding are ensured. This structural design effectively prevents current leakage or potential differences caused by poor grounding, thereby ensuring the safe operation of the battery system.

[0017] 2) Rust Prevention: During the electrophoretic coating process, the stable connection of the equipotential grounding structure prevents incomplete coating, reducing the risk of metal surface exposure and rust caused by coating defects. This is of great significance for extending the service life of the battery box and improving its overall corrosion resistance.

[0018] 3) Improved Processing Efficiency: The processing unit is designed with automation and efficiency in mind. Using positioning fixtures on the machine frame and a three-dimensionally movable welding module, rapid positioning and precise welding of battery case profiles are achieved. This automated production method not only reduces the complexity and labor intensity of manual operations, but also significantly improves processing efficiency and production line capacity.

[0019] 4) Guaranteed welding quality: Multi-point resistance welding technology ensures a strong connection between the steel sleeve and the stainless steel sheet. The heat generated during welding is evenly distributed, reducing the risk of welding deformation and cracks. At the same time, the use of welding glue further enhances the sealing and corrosion resistance of the joint, improving the overall quality of the welded joint.

[0020] 5) Enhanced Product Competitiveness: Utilizing this advanced equipotential grounding structure and processing technology not only enhances the safety and reliability of the battery case but also meets market demand for high-quality, high-efficiency products. This helps companies stand out in the fierce market competition and enhances their product competitiveness and brand influence.

[0021] In summary, the battery box equipotential grounding structure and its processing device and welding process have shown significant beneficial effects in improving grounding stability, preventing rust, improving processing efficiency, ensuring welding quality and enhancing product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery box equipotential grounding structure;

[0023] Figure 2 This is a connection diagram of the equipotential grounding structure;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the equipotential grounding structure processing device;

[0025] Figure 4A schematic diagram of the three-dimensional structure of the positioning tooling;

[0026] In the figure: 1. Battery box profile; 2. Steel sleeve; 3. Stainless steel sheet; 4. Welding area; 5. Welding glue; 6-Frame; 7-Welding module; 8-Positioning tooling; 9-Slide; 10-Transverse frame; 11-Vertical frame; 12-Vertical guide rail; 13-Vertical slider; 14-Transverse guide rail; 15-Transverse slider; 16-Support column; 17-Positioning column; 18-Three-petal positioner; 19-Pressure plate one; 20-Pressure plate two. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below 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.

[0028] like Figure 1 、 2 The figure shows a battery case equipotential grounding structure, comprising a steel sleeve 2 and a stainless steel sheet 3, mounted on and interconnected by a battery case profile 1. Welding adhesive 5 is installed between the steel sleeve and the stainless steel sheet, and the steel sleeve and the stainless steel sheet are welded together using multi-point resistance welding. The resistance welding zone 4 is mounted on top of the stainless steel sheet, with multiple welding points evenly distributed around the axis. The steel sleeve and stainless steel sheet are coaxially mounted and have matching dimensions. Multiple equipotential grounding structures are evenly distributed along the length of the battery case profile.

[0029] The above structural design has the following advantages: The beneficial effects of the equipotential grounding structure of the battery box are mainly reflected in the following aspects: (1) Enhanced electrical safety: By tightly combining the steel sleeve with the stainless steel sheet and using multi-point resistance welding for welding, the reliability of the equipotential grounding of the battery box is ensured. This structural design effectively reduces the risk of electric shock caused by leakage of the battery pack during operation and ensures the safety of personnel. (2) Improved welding quality: The resistance welding welding area is set at the top of the stainless steel sheet, and multiple welding points are evenly distributed around the axis. This layout makes the welding heat distribution more uniform and reduces the risk of welding deformation and cracks. At the same time, the use of welding glue further enhances the sealing and corrosion resistance of the joint and improves the overall quality of the welded joint. (3) Optimized structural design: The steel sleeve and the stainless steel sheet are coaxially arranged and matched in size. This design not only simplifies the processing process, but also ensures the compactness and stability of the grounding structure. In addition, multiple equipotential grounding structures are evenly distributed along the length of the battery box profile, which further improves the overall grounding effect of the battery box and enhances the electrical safety performance. (4) Improved corrosion resistance: Since the battery box usually needs to be fully coated with electrophoretic coating, and the stainless steel sheets in the equipotential grounding structure have good corrosion resistance, this structure can improve the corrosion resistance of the battery box to a certain extent and extend its service life. (5) Strong adaptability: The equipotential grounding structure is suitable for various types of battery box profiles and can be flexibly adjusted and optimized according to actual needs. This design makes the structure have broad application prospects in the fields of new energy vehicles and energy storage systems.

[0030] A device for processing an equipotential grounding structure of a battery box includes a frame 6, on which is mounted a positioning tool 8 for positioning a battery box profile, a welding module 7 is mounted on the frame at a position corresponding to the upper portion of the positioning tool, and a driving device for driving the welding module to move in three-dimensional space is mounted on the frame. The driving device includes a slide 9 movably mounted on the frame, a retractable resistance welding machine is mounted downward on the slide, a transverse frame 10 is mounted on the frame along the transverse direction of the slide, a longitudinal frame 11 is mounted on the frame at both ends corresponding to the transverse frame, a longitudinal guide rail 12 is mounted on the longitudinal frame along the longitudinal direction of the resistance welding machine, a longitudinal slider 13 cooperating with the longitudinal guide rail is mounted on the transverse frame, and a longitudinal driving mechanism for driving the transverse frame to move back and forth along the longitudinal guide rail is mounted on the longitudinal frame; a transverse guide rail 14 is mounted on the transverse frame, the slide is mounted on the transverse guide rail, a transverse slider 15 cooperating with the transverse guide rail is mounted on the slide, and a transverse driving mechanism for driving the slide to move back and forth along the transverse guide rail is mounted on the transverse frame.

[0031] The positioning tooling includes a supporting mechanism installed on the frame, and the supporting mechanism includes a supporting column 16 and a positioning column 17 installed on the frame. The positioning column is installed at a position corresponding to the equipotential grounding structure. A three-petal positioner 18 for fixing the inner wall of the steel sleeve is installed on the positioning column. A clamping mechanism is installed on the frame at a position corresponding to the upper surface of the battery box profile. The clamping mechanism includes a pressing plate 19 and a pressing plate 2 20 movably installed on the frame. The pressing plate 1 is installed corresponding to the upper surface of the battery box profile, and the pressing plate 2 is installed just above the equipotential grounding structure. The pressing plate 1 and the pressing plate 2 are respectively connected to a clamping reciprocating drive mechanism for driving the pressing plate 1 and the pressing plate 2 to rise and press down.

[0032] There are multiple positioning tools distributed on the frame in the horizontal and vertical directions, and the multiple positioning tools form a welding tool area with staggered distribution directions.

[0033] The three-petal positioner includes a positioning claw installed on the positioning column. Three positioning claws are evenly distributed around the axis. The positioning surface of the positioning claw is arc-shaped. A slide groove is radially opened on the positioning column. A slider is installed in the slide groove. The positioning claw is installed on the slider. A positioning drive mechanism for driving the three positioning claws to retract / expand is installed on the frame.

[0034] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0037] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred 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 battery box equipotential grounding structure, characterized by: It includes a steel sleeve and a stainless steel sheet that are arranged on the battery box profile and connected to each other. Welding glue is provided between the steel sleeve and the stainless steel sheet. The steel sleeve and the stainless steel sheet are welded by multi-point resistance welding; the resistance welding welding area is arranged at the top position of the stainless steel sheet, and there are multiple welding points in the welding area evenly distributed around the axis. The equipotential grounding structure is evenly distributed along the length direction of the battery box profile.

2. The battery box equipotential grounding structure according to claim 1, characterized in that: The steel sleeve and the stainless steel sheet are coaxially arranged and have matching sizes.

3. A device for processing the battery box equipotential grounding structure according to any one of claims 1-2, characterized in that: It comprises a frame, on which a positioning tool is provided for positioning the battery box profile, a welding module is provided on the frame corresponding to the position above the positioning tool, and a driving device is provided on the frame for driving the welding module to move in three-dimensional space.

4. The device for processing the equipotential grounding structure of a battery box according to claim 3, characterized in that: The driving device includes a slide movably arranged on a frame, a retractable resistance welding device is arranged downwardly on the slide, a transverse frame is arranged on the frame along the transverse direction of the slide, a longitudinal frame is arranged on the frame corresponding to the two ends of the transverse frame, a longitudinal guide rail is arranged on the longitudinal frame along the longitudinal direction of the resistance welding device, a longitudinal slider cooperating with the longitudinal guide rail is provided on the transverse frame, and a longitudinal driving mechanism for driving the transverse frame to move back and forth along the longitudinal guide rail is provided on the longitudinal frame; a transverse guide rail is provided on the transverse frame, the slide is arranged on the transverse guide rail, a transverse slider cooperating with the transverse guide rail is provided on the slide, and a transverse driving mechanism for driving the slide to move back and forth along the transverse guide rail is provided on the transverse frame.

5. The device for processing the equipotential grounding structure of a battery box according to claim 3, characterized in that: The positioning tooling includes a supporting mechanism arranged on the frame, and the supporting mechanism includes a supporting column and a positioning column arranged on the frame, the positioning column is arranged corresponding to the position of the equipotential grounding structure, and the positioning column is provided with a three-petal positioner for fixing the inner wall of the steel sleeve, and a clamping mechanism is provided on the frame corresponding to the upper surface position of the battery box profile, and the clamping mechanism includes a pressing plate 1 and a pressing plate 2 movably arranged on the frame, the pressing plate 1 is arranged corresponding to the upper surface of the battery box profile, and the pressing plate 2 is arranged corresponding to the equipotential grounding structure; the pressing plate 1 and the pressing plate 2 are respectively connected to a clamping reciprocating drive mechanism for driving the pressing plate 1 and the pressing plate 2 to rise and press down.

6. The device for processing the equipotential grounding structure of a battery box according to claim 3, characterized in that: A plurality of positioning tools are distributed on the frame in the transverse direction and the longitudinal direction, and the plurality of positioning tools form a welding tool area with staggered distribution directions.

7. The device for processing the equipotential grounding structure of a battery box according to claim 5, characterized in that: The three-petal positioner includes a positioning claw arranged on the positioning column, three positioning claws are evenly distributed around the axis, the positioning surface of the positioning claw is arc-shaped, a slide groove is radially opened on the positioning column, a slider is arranged in the slide groove, the positioning claw is arranged on the slider, and a positioning drive mechanism for driving the three positioning claws to retract / expand is provided on the frame.

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