An explosion-proof laminated busbar and a preparation process thereof

Abstract

The present application relates to the technical field of explosion-proof busbar, and particularly relates to an explosion-proof laminated busbar, which comprises a negative plate, a positive plate and an insulating plate located between the negative plate and the positive plate, the upper end and the lower end of the insulating plate are respectively provided with an upper insulating column and a lower insulating column in an integrated manner, the upper insulating column extends upwards above the positive plate, the lower insulating column extends downwards below the negative plate, the negative plate is connected with a negative copper bar extending upwards above the positive plate, the positive plate is provided with a soft connection assembly and connected with a positive copper bar through the soft connection assembly, the positive copper bar and the negative copper bar are respectively connected with symmetrically arranged external soft connection body one and external soft connection body two, and an arc separation plate is arranged between the positive copper bar and the negative copper bar. The present application further provides a preparation process of the explosion-proof laminated busbar. The present application can improve the production efficiency, improve the stability of the quality, reduce the manufacturing cost, and greatly improve the electrical safety performance.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof busbar technology, and specifically provides an explosion-proof laminated busbar and its manufacturing process. Background Technology

[0002] With the continuous growth of energy demand and the ongoing development of power systems, flexible DC transmission technology, as a new type of power transmission technology developed with modular multilevel converter (MMC) technology as its core, occupies an increasingly important position in the field of modern power transmission. In the power transmission and distribution system of flexible DC projects, laminated busbars, as key components connecting various electrical devices and transmitting electrical energy, directly affect the stability and reliability of the entire system. Laminated busbars, due to their many advantages such as repeatable electrical performance, low distributed inductance, high voltage and high current resistance, low temperature rise, low impedance, anti-interference, high reliability, space saving, and simple and quick assembly, have become an ideal choice for medium and high power converter applications, and their application in flexible DC projects is becoming increasingly widespread.

[0003] In existing technologies, traditional laminated busbars typically use PET material as the adhesive layer, bonded to milled FR4 or SMC parts for both internal insulation and surface bonding. This aims to increase clearances and creepage distances to ensure insulation performance. However, in certain special applications, such as environments with flammable or explosive gases or dust, or in situations where power devices like IGBTs or silicon stacks explode due to overvoltage or overcurrent, the high temperature, high pressure, and flying debris from the explosion may ignite or explode surrounding flammable or explosive materials. Therefore, traditional laminated busbars cannot meet operational requirements. Specifically, traditional laminated busbars have the following main drawbacks:

[0004] 1. Under the high-voltage conditions of flexible DC transmission, the high temperature resistance and peel strength of PET material are limited. When the temperature reaches 130℃ and the peel force is >1N / mm, the busbar is prone to delamination, which leads to the failure of the busbar insulation.

[0005] 2. Creepage distances and clearances are difficult to guarantee in traditional open-structure designs. To address this issue, two methods are typically employed:

[0006] 1) Increasing the size of the copper plate hole and shortening the copper plate outline can ensure safety, but this method will affect the temperature rise and inductance of the busbar;

[0007] 2) FR4 or SMC parts with machined bosses are then spliced ​​together with insulating structural adhesive to ensure safety. However, the spliced ​​FR4 or SMC parts have low bonding strength and will separate and fall off when subjected to explosive impact, affecting electrical performance. In addition, the efficiency and cost are high.

[0008] In summary, given the numerous shortcomings of traditional laminated busbars, designing an explosion-proof laminated busbar that can reduce safety accidents while meeting the electrical clearance and creepage distance requirements under high-voltage conditions is an urgent problem to be solved. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides an explosion-proof laminated busbar and its manufacturing process, which can improve the safety and operational stability of flexible DC projects, reduce the production cost of laminated busbars, and meet the electrical clearance and creepage distance requirements under high-voltage conditions.

[0010] The present invention provides an explosion-proof stacked busbar, comprising a negative electrode plate, a positive electrode plate, and an insulating plate located between the negative electrode plate and the positive electrode plate; the upper end and the lower end of the insulating plate are respectively provided with an upper insulating post and a lower insulating post by integral molding, and the upper insulating post and the lower insulating post are staggered, the upper insulating post extends upward to above the positive electrode plate, and the lower insulating post extends downward to below the negative electrode plate; a negative electrode copper busbar extending upward to above the positive electrode plate is connected to the negative electrode plate, and a flexible connection assembly is provided on the positive electrode plate and a positive electrode copper busbar is connected through the flexible connection assembly; an external flexible connector one and an external flexible connector two are respectively symmetrically arranged on the positive electrode copper busbar and the negative electrode copper busbar.

[0011] Furthermore, the positive electrode plate has an upper receiving through hole for accommodating the upper insulating post, with the upper insulating post extending upward from the upper receiving through hole to the top of the positive electrode plate; the negative electrode plate has a lower receiving through hole for accommodating the lower insulating post, with the lower insulating post extending downward from the lower receiving through hole to the bottom of the negative electrode plate; the heights of the upper and lower insulating posts are respectively set according to the required creepage distance.

[0012] Furthermore, the flexible connection assembly includes an upper flexible connector and a lower flexible connector. The upper and lower flexible connectors each include a connecting plate one and a connecting plate two connected to the upper end of the positive electrode plate, respectively. The upper flexible connector also includes a connecting plate three connected to the upper end of the connecting plate one, and the lower flexible connector also includes a connecting plate four connected to the upper end of the connecting plate two. The connecting plates one and two are arranged in parallel and are both perpendicular to the positive electrode plate. The connecting plates three and four are arranged in parallel and are both parallel to the positive electrode plate. The connecting plate three is located directly above the connecting plate four, and the lower end of the positive electrode copper busbar is clamped between the connecting plates one and two.

[0013] Furthermore, the insulating plate and the positive electrode plate are matched with receiving slots that communicate with the negative electrode plate; the negative electrode copper busbar is welded to the negative electrode plate and extends through the receiving slot to the top of the positive electrode plate.

[0014] Furthermore, an insulating receiving groove plate is integrally formed on the insulating plate and located between the upper insulating pillars. The insulating receiving groove plate extends upward from the receiving groove to above the positive electrode plate. The negative electrode copper busbar extends from the insulating receiving groove plate to above the positive electrode plate, and the insulating receiving groove plate provides insulation between the negative electrode copper busbar and the positive electrode plate.

[0015] Furthermore, the positive electrode copper busbar is L-shaped in general, specifically including a lower copper busbar parallel to the positive electrode plate and an upper copper busbar perpendicular to the positive electrode plate. The lower copper busbar is clamped between connecting plate one and connecting plate two. The upper copper busbar is matched and parallel to the upper part of the negative electrode copper busbar, and the upper copper busbar and the negative electrode copper busbar are locked together by insulating components and locking bolts.

[0016] Furthermore, the insulation assembly includes an arc-blocking plate placed between the positive copper busbar and the negative copper busbar. The arc-blocking plate is perpendicular to the positive plate, and both sides of the arc-blocking plate extend to the outside of the upper copper busbar and the negative copper busbar in the width direction. The upper end of the arc-blocking plate extends upward to the top of the upper copper busbar and the negative copper busbar, and the lower end of the arc-blocking plate extends downward to the bottom of the upper copper busbar.

[0017] Furthermore, the upper copper busbar, the negative copper busbar, and the arc-blocking plate are respectively provided with connection hole one, connection hole two, and connection hole three, which are coaxially arranged; the locking bolt passes through connection hole one, connection hole two, and connection hole three and locks the upper copper busbar, the arc-blocking plate, and the negative copper busbar.

[0018] Furthermore, the insulation assembly also includes an arc-blocking post connected to the arc-blocking plate, with the arc-blocking post and the connecting hole three being coaxially arranged. The arc-blocking post is sleeved outside the locking bolt and extends through the connecting hole one to the outside of the upper copper busbar. The insulation assembly also includes an arc-blocking sleeve sleeved outside the locking bolt and the arc-blocking post, with the arc-blocking post extending into the arc-blocking sleeve. An external flexible connector one is located above the arc-blocking post.

[0019] A process for preparing an explosion-proof laminated busbar includes the following steps:

[0020] S1: The negative copper busbar is soldered to the upper end of the negative plate by silver brazing, and the upper and lower flexible connectors are soldered to the upper end of the positive plate by silver brazing.

[0021] S2: The insulation board is manufactured by molding, wherein the upper insulation post, the lower insulation post, and the insulation receiving groove are integrally formed on the insulation board;

[0022] S3: A double-sided adhesive film plate one is set between the negative electrode plate and the insulating plate, and a double-sided adhesive film plate two is set between the positive electrode plate and the insulating plate; the negative electrode plate and the insulating plate are respectively glued to the lower adhesive surface and the upper adhesive surface of the double-sided adhesive film plate one; the positive electrode plate and the insulating plate are respectively glued to the upper adhesive surface and the lower adhesive surface of the double-sided adhesive film plate two; at this time, the upper insulating column and the insulating receiving groove plate extend into the upper part of the positive electrode plate, the lower insulating column extends into the lower part of the negative electrode plate, and the negative electrode copper busbar passes through the insulating receiving groove plate and extends into the upper part of the positive electrode plate;

[0023] S4: Install the external flexible connector II onto the upper part of the negative copper busbar;

[0024] S5: Install the arc-blocking plate and the positive copper busbar; lock the lower copper busbar of the positive copper busbar between the connecting plate three and the connecting plate four, and lock the positive copper busbar, the arc-blocking plate and the negative copper busbar with the locking bolts;

[0025] S6: Install the external flexible connector onto the upper part of the positive copper busbar.

[0026] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0027] 1. The explosion-proof stacked busbar in this invention can reduce the probability of safety accidents and solve safety pain points in special scenarios. It can also meet the electrical clearance and creepage distance requirements under high voltage conditions through open structure adaptation. Its reliability meets the core operating requirements of the flexible DC system, and it has economic benefits throughout the entire life cycle. It can greatly improve the safety level and operational stability of flexible DC projects.

[0028] 2. By applying a post-molding spraying process, this invention solves the problems of low efficiency and large quality fluctuations in traditional processing. While improving production efficiency and quality stability, it effectively reduces the manufacturing cost of laminated busbars, forming a dual advantage in technology and cost.

[0029] 3. This invention combines the molded insulating component with the PI double-sided adhesive film through a hot pressing process. On the one hand, it can significantly optimize the creepage distance and electrical clearance of the explosion-proof stacked busbar, improving electrical safety performance. On the other hand, it can enhance the impact resistance and high temperature resistance of the busbar, making it fully compliant with the stringent usage requirements in explosion-proof scenarios.

[0030] 4. This explosion-proof stacked busbar is designed with a structure that has continuous working capability to address the overvoltage and overcurrent explosion problems of power devices (such as IGBTs and silicon stacks). Even after the device explodes, the busbar can still operate normally, which reduces the cost losses caused by safety accidents and solves the core safety pain points in special scenarios. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof stacked busbar provided in an embodiment of the present invention. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the overall structure of the explosion-proof stacked busbar provided in an embodiment of the present invention. Figure 2 ;

[0033] Figure 3 This is an overall exploded view of the explosion-proof stacked busbar provided in an embodiment of the present invention;

[0034] Figure 4 This is an exploded schematic diagram of each layer of the explosion-proof stacked busbar provided according to an embodiment of the present invention;

[0035] Figure 5 This is a partial cross-sectional view of the explosion-proof laminated busbar provided according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the creepage distance of the upper insulating column in the explosion-proof stacked busbar provided by an embodiment of the present invention.

[0037] The reference numerals in the attached drawings include: negative electrode plate 1, positive electrode plate 2, insulating plate 3, upper insulating post 4, lower insulating post 5, positive copper busbar 6, negative copper busbar 7, external flexible connector 1 8, external flexible connector 2 9, upper receiving through hole 10, lower receiving through hole 11, upper flexible connector 12, lower flexible connector 13, connecting plate 1 14, connecting plate 2 15, connecting plate 3 16, connecting plate 4 17, receiving through groove 18, insulating receiving groove plate 19, lower copper busbar 20, upper copper busbar 21, locking bolt 22, arc blocking plate 23, connecting hole 1 24, connecting hole 2 25, connecting hole 3 26, arc blocking post 27, arc blocking sleeve 28, double-sided adhesive film plate 1 29, double-sided adhesive film plate 2 30. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-6 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof.

[0039] An explosion-proof laminated busbar includes a negative electrode plate 1, a positive electrode plate 2, and an insulating plate 3 located between the negative electrode plate 1 and the positive electrode plate 2. A double-sided adhesive film plate 29 is disposed between the negative electrode plate 1 and the insulating plate 3, and a double-sided adhesive film plate 30 is disposed between the positive electrode plate 2 and the insulating plate 3. The negative electrode plate 1 and the insulating plate 3 are respectively glued to the lower adhesive surface and the upper adhesive surface of the double-sided adhesive film plate 29, and the positive electrode plate 2 and the insulating plate 3 are respectively glued to the upper adhesive surface and the lower adhesive surface of the double-sided adhesive film plate 30. The negative electrode plate 1, double-sided adhesive film plate 29, insulating plate 3, double-sided adhesive film plate 30, and positive electrode plate 2 are bonded together by high temperature and pressure. Double-sided adhesive film plate 29 and double-sided adhesive film plate 30 have adhesive, insulating and isolating functions. The insulating plate 3 is made of SMC, DMC, or FR4 and is integrally molded and painted, which can extend corrosion resistance and lifespan, and increase the creepage distance, electrical clearance and intermediate insulation between the positive and negative copper busbars.

[0040] A negative electrode copper busbar 7 extending upwards to the positive electrode plate 2 is connected to the negative electrode plate 1. A flexible connection assembly is provided on the positive electrode plate 2, and a positive electrode copper busbar 6 located above the positive electrode plate 2 is connected through the flexible connection assembly. External flexible connector 1 8 and external flexible connector 2 9 are symmetrically arranged on the positive electrode copper busbar 6 and the negative electrode copper busbar 7, respectively. The positive electrode copper busbar 6 and the negative electrode copper busbar 7 are made of copper or pure aluminum. The negative electrode copper busbar 7 is matched and positioned through process holes and fixed to the negative electrode plate 1 by silver brazing. The positive electrode copper busbar 6 and the negative electrode copper busbar 7 serve as electrical connections and current conduction functions.

[0041] like Figures 1-4 As shown, the upper and lower ends of the insulating plate 3 are respectively provided with an upper insulating post 4 and a lower insulating post 5 by integral molding. The upper insulating post 4 and the lower insulating post 5 are staggered to avoid installation interference. Usually, the inner diameter of the lower insulating post 5 is larger than the inner diameter of the upper insulating post 4. A capacitor is installed inside the lower insulating post 5. In traditional laminated busbars, the insulating plate 3 and the upper insulating post 4 and lower insulating post 5 are separate structures. In order to increase the creepage distance and improve the insulation performance, the upper insulating post 4 and the lower insulating post 5 need to be glued to the insulating plate 3. This method increases the process and cost, and also has the problem of difficult sealing. In this embodiment, the insulating plate 3, the upper insulating post 4 and the lower insulating post 5 are integrally molded, which solves the relevant problems in traditional laminated busbars. Moreover, no additional coating is required, which can further reduce costs and improve insulation performance.

[0042] The positive electrode plate 2 has an upper receiving through hole 10 for accommodating the upper insulating post 4. The upper insulating post 4 extends upward from the upper receiving through hole 10 to the top of the positive electrode plate 2. The negative electrode plate 1 has a lower receiving through hole 11 for accommodating the lower insulating post 5. The lower insulating post 5 extends downward from the lower receiving through hole 11 to the bottom of the negative electrode plate 1. The heights of the upper insulating post 4 and the lower insulating post 5 are set according to the required creepage distance. Taking the creepage distance of the upper insulating post 4 as an example... Figure 6 As shown, the creepage distance is... Figure 6 The length shown by the S-line (thick black solid line) can be adjusted by changing the height of the upper insulating post 4 if the creepage distance needs to be increased or decreased.

[0043] According to the national standard GB / T 16935.1, when the rated voltage is ≥2300V and the peak voltage is ≥4500V, the national standard requires a creepage distance of ≥36.8mm. At this time, the creepage distance can be made to meet the national standard requirements by designing the height of the upper insulating post 4, and redundancy design can be made.

[0044] The flexible connection assembly includes an upper flexible connector 12 and a lower flexible connector 13. The upper flexible connector 12 and the lower flexible connector 13 each include a first connecting plate 14 and a second connecting plate 15 connected to the upper end of the positive electrode plate 2, respectively. The upper flexible connector 12 also includes a third connecting plate 16 connected to the upper end of the first connecting plate 14, and the lower flexible connector 13 also includes a fourth connecting plate 17 connected to the upper end of the second connecting plate 15. The first connecting plate 14 and the second connecting plate 15 are arranged in parallel and are both perpendicular to the positive electrode plate 2. The third connecting plate 16 and the fourth connecting plate 17 are arranged in parallel and are both parallel to the positive electrode plate 2. The third connecting plate 16 is located directly above the fourth connecting plate 17. The positive electrode copper busbar 6 is L-shaped in general, specifically including a lower copper busbar 20 parallel to the positive electrode plate 2 and an upper copper busbar 21 perpendicular to the positive electrode plate 2. The lower copper busbar 20 in the positive electrode copper busbar 6 is clamped between the connecting plate 14 and the connecting plate 25. The connecting plate 14, the lower copper busbar 20, and the connecting plate 25 are locked together by bolts. During use, under normal working conditions, the upper flexible connector 12 and the lower flexible connector 13 will not shake. When subjected to large vibration and impact, the upper flexible connector 12 and the lower flexible connector 13 can flexibly shake to avoid the component jamming phenomenon, which can greatly improve the impact resistance and extend the service life.

[0045] The insulating plate 3 and the positive electrode plate 2 are provided with a receiving groove 18 that is connected to the negative electrode plate 1. The negative electrode copper busbar 7 is welded to the negative electrode plate 1 and extends through the receiving groove 18 to the top of the positive electrode plate 2. The insulating plate 3 is provided with an insulating receiving groove 19 located between the upper insulating pillars 4 by means of integral molding. The insulating receiving groove 19 extends upward from the receiving groove 18 to the top of the positive electrode plate 2. The negative electrode copper busbar 7 extends from the insulating receiving groove 19 to the top of the positive electrode plate 2. The insulating receiving groove 19 provides insulation between the negative electrode copper busbar 7 and the positive electrode plate 2.

[0046] The upper copper busbar 21 is parallel to the upper part of the negative copper busbar 7, and the upper copper busbar 21 and the negative copper busbar 7 are locked together by an insulating component and a locking bolt 22. The insulating component includes an arc-blocking plate 23 placed between the positive copper busbar 6 and the negative copper busbar 7. The arc-blocking plate 23 is perpendicular to the positive plate 2, and the two sides of the arc-blocking plate 23 extend to the outside of the upper copper busbar 21 and the negative copper busbar 7 in the width direction. The upper end of the arc-blocking plate 23 extends upward to the top of the upper copper busbar 21 and the negative copper busbar 7, and the lower end of the arc-blocking plate 23 extends downward to the bottom of the upper copper busbar 21, so as to effectively insulate the positive copper busbar 6 and the negative copper busbar 7.

[0047] The upper copper busbar 21, the negative copper busbar 7, and the arc-isolating plate 23 are respectively provided with connecting holes 1 24, 25, and 3 26. Connecting holes 1 24, 25, and 3 26 are coaxially arranged. Locking bolts 22 pass through connecting holes 1 24, 25, and 3 26 to lock the upper copper busbar 21, the arc-isolating plate 23, and the negative copper busbar 7. The insulation assembly also includes an arc-isolating post 27 connected to the arc-isolating plate 23. The arc-isolating post 27 is coaxially arranged with the connecting hole 3 26. 7 is sleeved outside the locking bolt 22. The arc-isolating post 27 passes through the connecting hole 24 and extends to the outside of the upper copper busbar 21. The insulation assembly also includes an arc-isolating sleeve 28 sleeved outside the locking bolt 22 and the arc-isolating post 27. The arc-isolating sleeve 28 can improve the insulation performance between the locking bolt 22 and the surrounding components. The arc-isolating post 27 extends into the arc-isolating sleeve 28, so that the arc-isolating post 27 and the arc-isolating sleeve 28 form a double layer of insulation between the upper copper busbar 21 and the locking bolt 22. The external flexible connector 8 is located above the arc-isolating post 27.

[0048] A process for preparing an explosion-proof laminated busbar includes the following steps:

[0049] S1: The negative copper busbar 7 is soldered to the upper end of the negative plate 1 by silver brazing, and the upper flexible connector 12 and the lower flexible connector 13 are soldered to the upper end of the positive plate 2 by silver brazing.

[0050] S2: The insulating board 3 is manufactured by molding, wherein the upper insulating column 4, the lower insulating column 5, and the insulating receiving groove plate 19 are integrally formed on the insulating board 3.

[0051] S3: A double-sided adhesive film plate 29 is set between the negative electrode plate 1 and the insulating plate 3, and a double-sided adhesive film plate 30 is set between the positive electrode plate 2 and the insulating plate 3. The negative electrode plate 1 and the insulating plate 3 are respectively glued to the lower adhesive surface and the upper adhesive surface of the double-sided adhesive film plate 29, and the positive electrode plate 2 and the insulating plate 3 are respectively glued to the upper adhesive surface and the lower adhesive surface of the double-sided adhesive film plate 30. The double-sided adhesive film plate 29 has a through hole structure matching the lower receiving through hole 11 and the receiving through groove 18. The double-sided adhesive film plate 30 has a through hole structure matching the upper receiving through hole 10 and the receiving through groove 18. At this time, the upper insulating post 4 and the insulating receiving groove plate 19 extend into the upper part of the positive electrode plate 2, the lower insulating post 5 extends into the lower part of the negative electrode plate 1, and the negative electrode copper busbar 7 passes through the insulating receiving groove plate 19 and extends into the upper part of the positive electrode plate 2.

[0052] S4: Install the external flexible connector 29 onto the upper part of the negative copper busbar 7.

[0053] S5: Install the arc-blocking plate 23 and the positive copper busbar 6; clamp the lower copper busbar 20 of the positive copper busbar 6 between the connecting plate 14 and the connecting plate 25, and lock the connecting plate 14, the lower copper busbar 20, and the connecting plate 25 with bolts; lock the positive copper busbar 6, the arc-blocking plate 23, and the negative copper busbar 7 with the locking bolts 22.

[0054] S6: Install the external flexible connector 8 onto the upper part of the positive copper busbar 6.

[0055] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0056] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An explosion-proof laminated busbar, characterized in that, The device includes a negative electrode plate (1), a positive electrode plate (2), and an insulating plate (3) located between the negative electrode plate (1) and the positive electrode plate (2). The upper and lower ends of the insulating plate (3) are respectively provided with an upper insulating post (4) and a lower insulating post (5) by integral molding. The upper insulating post (4) and the lower insulating post (5) are staggered. The upper insulating post (4) extends upward to above the positive electrode plate (2), and the lower insulating post (5) extends downward to below the negative electrode plate (1). A negative electrode copper busbar (7) extending upward to above the positive electrode plate (2) is connected to the negative electrode plate (1). A flexible connection assembly is provided on the positive electrode plate (2), and a positive electrode copper busbar (6) is connected through the flexible connection assembly. The positive electrode copper busbar (6) and the negative electrode copper busbar (7) are respectively connected to... External flexible connector 1 (8) and external flexible connector 2 (9) are symmetrically arranged; the insulating plate (3) and the positive electrode plate (2) are provided with receiving slots (18) that communicate with the negative electrode plate (1); the negative electrode copper busbar (7) is welded to the negative electrode plate (1) and extends through the receiving slot (18) to the top of the positive electrode plate (2); the insulating plate (3) is provided with an insulating receiving slot plate (19) located between the upper insulating pillars (4) by integral molding, the insulating receiving slot plate (19) extends upward from the receiving slot (18) to the top of the positive electrode plate (2); the negative electrode copper busbar (7) extends from the insulating receiving slot plate (19) to the top of the positive electrode plate (2), and passes through the insulating receiving slot plate (19) as the negative electrode. The copper busbar (7) is insulated from the positive electrode plate (2); the positive electrode plate (2) has an upper receiving through hole (10) for accommodating the upper insulating post (4), the upper insulating post (4) extends upward from the upper receiving through hole (10) to the top of the positive electrode plate (2); the negative electrode plate (1) has a lower receiving through hole (11) for accommodating the lower insulating post (5), the lower insulating post (5) extends downward from the lower receiving through hole (11) to the bottom of the negative electrode plate (1); the heights of the upper insulating post (4) and the lower insulating post (5) are respectively set according to the required creepage distance; the flexible connection assembly includes an upper flexible connector (12) and a lower flexible connector (13), the upper flexible connector (12) and the lower flexible connector (13) The upper flexible connector (12) includes a connecting plate 1 (14) and a connecting plate 2 (15) connected to the upper end of the positive electrode plate (2). The upper flexible connector (12) also includes a connecting plate 3 (16) connected to the upper end of the connecting plate 1 (14). The lower flexible connector (13) also includes a connecting plate 4 (17) connected to the upper end of the connecting plate 2 (15). The connecting plate 1 (14) and the connecting plate 2 (15) are arranged in parallel and are both perpendicular to the positive electrode plate (2). The connecting plate 3 (16) and the connecting plate 4 (17) are arranged in parallel and are both parallel to the positive electrode plate (2). The connecting plate 3 (16) is located directly above the connecting plate 4 (17), and the lower end of the positive electrode copper busbar (6) is clamped between the connecting plate 1 (14) and the connecting plate 2 (15).The positive electrode copper busbar (6) is L-shaped in general, specifically including a lower copper busbar (20) parallel to the positive electrode plate (2) and an upper copper busbar (21) perpendicular to the positive electrode plate (2). The lower copper busbar (20) is clamped between the connecting plate one (14) and the connecting plate two (15). The upper copper busbar (21) is parallel to the upper part of the negative electrode copper busbar (7), and the upper copper busbar (21) and the negative electrode copper busbar (7) are locked together by an insulating component and a locking bolt (22). The insulating component includes a component placed on the positive electrode copper busbar. An arc-blocking plate (23) is placed between the upper copper busbar (6) and the negative copper busbar (7). The arc-blocking plate (23) is perpendicular to the positive plate (2), and the two sides of the arc-blocking plate (23) extend to the outside of the upper copper busbar (21) and the negative copper busbar (7) in the width direction. The upper end of the arc-blocking plate (23) extends upward to the top of the upper copper busbar (21) and the negative copper busbar (7), and the lower end of the arc-blocking plate (23) extends downward to the bottom of the upper copper busbar (21). The upper copper busbar (21) and the negative copper busbar (7) The arc-blocking plate (23) is provided with connection hole 1 (24), connection hole 2 (25), and connection hole 3 (26), which are coaxially arranged; the locking bolt (22) passes through the connection hole 1 (24), connection hole 2 (25), and connection hole 3 (26) and locks the upper copper busbar (21), the arc-blocking plate (23), and the negative copper busbar (7); the insulation assembly also includes a partition connected to the arc-blocking plate (23). The arc column (27) and the arc-isolating column (27) are coaxially arranged with the connecting hole three (26). The arc-isolating column (27) is sleeved outside the locking bolt (22). The arc-isolating column (27) passes through the connecting hole one (24) and extends to the outside of the upper copper busbar (21). The insulating assembly also includes an arc-isolating sleeve (28) sleeved outside the locking bolt (22) and the arc-isolating column (27). The arc-isolating column (27) extends into the arc-isolating sleeve (28). The external flexible connector one (8) is located above the arc-isolating column (27).

2. A process for preparing an explosion-proof laminated busbar, comprising preparing the laminated busbar according to claim 1, characterized in that, Includes the following steps: S1: The negative copper busbar (7) is soldered to the upper end of the negative plate (1) by silver brazing, and the upper flexible connector (12) and lower flexible connector (13) are soldered to the upper end of the positive plate (2) by silver brazing. S2: The insulating board (3) is made by molding, wherein the upper insulating column (4), the lower insulating column (5), and the insulating receiving groove plate (19) are integrally formed on the insulating board (3); S3: A double-sided adhesive film plate one (29) is set between the negative electrode plate (1) and the insulating plate (3), and a double-sided adhesive film plate two (30) is set between the positive electrode plate (2) and the insulating plate (3); the negative electrode plate (1) and the insulating plate (3) are respectively glued to the lower adhesive surface and the upper adhesive surface of the double-sided adhesive film plate one (29); the positive electrode plate (2) and the insulating plate (3) are respectively glued to the upper adhesive surface and the lower adhesive surface of the double-sided adhesive film plate two (30); at this time, the upper insulating column (4) and the insulating receiving groove plate (19) extend into the upper part of the positive electrode plate (2), the lower insulating column (5) extends into the lower part of the negative electrode plate (1), and the negative electrode copper busbar (7) passes through the insulating receiving groove plate (19) and extends into the upper part of the positive electrode plate (2); S4: Install the external flexible connector 2 (9) on the upper part of the negative copper busbar (7); S5: Install the arc blocking plate (23) and the positive copper busbar (6); lock the lower copper busbar (20) of the positive copper busbar (6) between the connecting plate three (16) and the connecting plate four (17), and lock the positive copper busbar (6), the arc blocking plate (23) and the negative copper busbar (7) with the locking bolt (22); S6: Install the external flexible connector (8) on the upper part of the positive copper busbar (6).

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