IGBT bending device, energy storage converter and energy storage system with same

Abstract

The embodiment of the application relates to the technical field of IGBT, and provides an IGBT bending device, an energy storage converter and an energy storage system with the same. The embodiment of the application is used for bending the pins of a target workpiece. The bending device comprises a bearing base with a bearing surface for bearing the target workpiece. The bearing surface comprises a first bearing surface and a second bearing surface, which are connected through an arc-shaped third bearing surface. The pressing assembly comprises a pressing main body with a pressing end surface, which is movably arranged along a vertical direction. At least part of the pressing main body is movably arranged along a horizontal direction, so that, when the pressing main body is attached to the bearing base, a first part of the pin is attached to the first bearing surface, and a second part of the pin is attached to the second bearing surface, so that a bending part between the first part and the second part of the pin is formed to be consistent with the curvature of the arc-shaped surface. The problem that the stress is too large due to the direct contact between the mold and the pin in the prior art, and the IGBT pin is broken, is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of IGBT, in particular to an IGBT bending device, an energy storage converter and an energy storage system with the same. BACKGROUND

[0002] In the manufacturing process of power electronic equipment, IGBT (Insulated Gate Bipolar Transistor) is the core component of high-performance power conversion, and the accurate bending of the pin is a key step to realize the assembly and electrical connection of the circuit board. In the traditional process, the bending of the IGBT pin mainly relies on the direct vertical pressure of the mold, and the contact surface of the mold and the pin is at a right angle. During the pressure setting process, the pin will be subjected to concentrated stress from the vertical direction of the mold, and this stress distribution is extremely uneven, especially at the bending point of the IGBT pin, which may cause the pin to deform or break. Even if it does not break immediately, higher stress will accelerate the fatigue accumulation of the pin material, thereby shortening the service life of the IGBT and increasing the failure rate of the electronic power equipment. SUMMARY

[0003] The main purpose of the present application is to provide an IGBT bending device, an energy storage converter and an energy storage system with the same, to solve the problem of excessive stress caused by direct contact between the mold and the pin in the prior art, which in turn causes the IGBT pin to break.

[0004] According to some embodiments of the present application, the present application provides an IGBT bending device for bending the pin of a target workpiece, the bending device comprising:

[0005] A bearing base having a bearing surface for bearing the target workpiece, the bearing surface comprising a first bearing surface and a second bearing surface, the first bearing surface and the second bearing surface being connected by a third bearing surface, the third bearing surface being an arc surface;

[0006] A pressing assembly comprising a pressing body, the pressing body comprising a pressing end surface, the pressing body being movably arranged in a vertical direction, and at least part of the pressing body being movably arranged in a horizontal direction, so that when the pressing body is attached to the bearing base, the first part of the pin is attached to the first bearing surface and the second part of the pin is attached to the second bearing surface under the pressure of the pressing body, so that the first part of the pin and the second part of the pin form a bending part consistent with the curvature of the arc surface.

[0007] In some embodiments, the pressing body comprises a second pressing member movably arranged in the horizontal direction, and the pressing end surface is arranged on the second pressing member, the pressing end surface comprising an arc pressing surface, the curvature of the arc pressing surface being consistent with the curvature of the third bearing surface.

[0008] In some embodiments, the second pressing member comprises: a first bending component, the first bending component extending along a second direction;

[0009] a second bending component, the second bending component being arranged on the first bending component, the second bending component extending along a first direction, the first bending component having a first bending surface, the second bending component having a second bending surface, a junction of the first bending surface and the second bending surface being an arc-shaped pressing surface, the first bending surface, the second bending surface and the arc-shaped pressing surface collectively forming a pressing end surface, such that when the second pressing member moves along a horizontal direction, the first bending surface is fitted with at least part of the first bearing surface, the second bending surface is fitted with at least part of the second bearing surface, and the arc-shaped pressing surface is fitted with the third bearing surface, wherein the first direction is perpendicular to the second direction.

[0010] In some embodiments, the bearing base is provided with a first positioning portion, and the pressing body further comprises:

[0011] a first pressing member, the first pressing member being movably arranged along a vertical direction, the first pressing member being provided with a second positioning portion, the first pressing member having a first position and a second position, when the first pressing member moves to the first position, the first positioning portion and the second positioning portion are inserted to position the first pressing member;

[0012] when the first pressing member continues to move downward to the second position, the pressing end surface fits the first part of the pin with the first bearing surface and the second part of the pin with the second bearing surface, wherein the second pressing member is arranged on the first pressing member.

[0013] In some embodiments, the first positioning portion comprises a first positioning protrusion or a first positioning groove, and the second positioning portion comprises a second positioning groove matched with the first positioning protrusion or a second positioning protrusion matched with the first positioning groove.

[0014] In some embodiments, the bearing base comprises: a bearing component, the bearing component having a bearing surface, the bearing component being provided with a mounting groove, the mounting groove extending along a length or width direction of the bearing base, the mounting groove being used to accommodate a target workpiece, at least part of the first bearing surface being a groove bottom surface of the mounting groove.

[0015] In some embodiments, the bearing base further comprises: a support base, the support base being arranged on a side of the bearing component away from the mounting groove, the support base being provided with a first connecting site, the bearing component being provided with a second connecting site corresponding to the first connecting site, the bending device further comprising a connecting component, the connecting component being insertable through the first connecting site to fix the bearing component and the support base through the first connecting site and the second connecting site.

[0016] In some embodiments, the device further comprises a limiting portion disposed on the bearing surface, the limiting portion having a limiting gap in which at least a part of the pin of the target workpiece is clamped.

[0017] In some embodiments, the limiting portion is disposed on the first bearing surface and / or the second bearing surface; the second bearing surface comprises a first sub-surface and a second sub-surface, the first sub-surface being an arc-shaped surface, and the second sub-surface being a vertical surface.

[0018] In some embodiments, the limiting portion comprises a plurality of limiting blocks arranged along a length or width direction of the bearing base, each adjacent two limiting blocks forming a limiting gap therebetween.

[0019] According to some embodiments of the present application, the embodiments of the present application further provide an energy storage converter, comprising a power board, the power board being provided with a target workpiece, the target workpiece being made of the IGBT bending device described above, the pin of the target workpiece comprising a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion having an arc-shaped bending portion therebetween, the first sub-portion being located at a first side of the power board, and the second sub-portion penetrating through the power board to a second side of the power board to be welded with the power board.

[0020] In some embodiments, the target workpiece further comprises a body, the pin being disposed on the body, and the power board is further provided with a plurality of mounting components, the plurality of mounting components being located at the first side of the power board and used for fixing the body.

[0021] In some embodiments, the mounting component is provided with a receiving groove, at least a part of the body being embedded in the receiving groove, and the mounting component is connected with the power board to fix the body.

[0022] In some embodiments, a length of the pin at the second side is greater than a length of the pin at the first side; and / or, the receiving groove has a groove surface matched with the bending portion of the pin.

[0023] According to some embodiments of the present application, the embodiments of the present application further provide an energy storage system comprising the energy storage converter described above.

[0024] The technical solutions provided by the embodiments of the present application have at least the following advantages:

[0025] In the conventional vertical pressing mode, since the pin needs to complete the angle change in an instant, concentrated stress is easily generated at the bending point in the bending process, which leads to deformation, damage or even breakage of the pin. The scheme of the present application introduces a horizontally movable pressing body, so that the bending process of the pin is more gentle, the stress is uniformly distributed, the damage to the pin in the bending process is significantly reduced, and the electrical connection integrity and reliability of the IGBT assembly are improved.

[0026] The arc-shaped third bearing surface in the scheme naturally matches the bent part of the pin, ensuring the consistency and accuracy of the bending operation, and avoiding the problem of poor pin contact or position deviation caused by bending angle error. Compared with the direct vertical pressing of the prior art, this precise bending method reduces the loss of yield, improves the batch production efficiency and quality of the product.

[0027] Since the scheme reduces the stress acting directly on the pin, reduces the equipment failure rate caused by improper bending operation, reduces the maintenance demand and cost of the equipment on the production line. In addition, the structural design of the bearing base, especially the arc surface of the third bearing surface, reduces the wear of the pin, prolongs the service life of the IGBT. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings accompanying the specification of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 It is a structural schematic diagram of an IGBT bending device;

[0030] Figure 2 It is a structural schematic diagram of a bearing base of an embodiment of the present application;

[0031] Figure 3 It is an enlarged schematic diagram of A in Figure 2

[0032] Figure 4 It is a structural schematic diagram of a power plate in an embodiment of the present application;

[0033] Figure 5 It is an enlarged schematic diagram of B in Figure 4

[0034] Among them, the above drawings include the following reference signs:

[0035] 1, bearing base; 11, bearing surface; 111, first bearing surface; 112, third bearing surface; 113, second bearing surface; 12, mounting groove; 13, limiting part; 131, limiting block; 14, supporting base; 2, target workpiece; 3, pressing main body; 31, first pressing part; 32, second pressing part; 321, first bending part; 3211, first bending surface; 322, second bending part; 3222, second bending surface; 201, body; 202, pin; 323, pressing end surface; 324, main body part; 325, transmission rod; 4, power plate; 6, containing groove; 7, mounting cover. DETAILED DESCRIPTION

[0036] ​​It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0037] As can be known from the background art, in the manufacturing process of power electronic equipment, IGBT (Insulated Gate Bipolar Transistor) as a core component of high-performance power conversion, the accurate bending of its pin is a key step to realize the assembly and electrical connection of the circuit board. In the traditional process, the bending of the IGBT pin mainly relies on the direct vertical pressure of the mold, and the contact surface of the mold and the pin is in a right angle shape. In the process of pressure setting, the pin will be subjected to concentrated stress from the vertical direction of the mold. This stress distribution is extremely uneven, especially at the bending point of the IGBT pin, which may cause the pin to be deformed or broken. Even if it does not break immediately, higher stress will accelerate the fatigue accumulation of the pin material, thereby shortening the service life of the IGBT and increasing the failure rate of the electronic power equipment.

[0038] Therefore, the purpose of the present application is to provide an IGBT bending device, an energy storage converter and an energy storage system with the same to at least improve the problem of excessive stress caused by the direct contact of the mold and the pin in the prior art, thereby causing the IGBT pin to break.

[0039] Firstly, the present application provides an IGBT bending device for bending the pin 202 of the target workpiece 2, the bending device comprising:

[0040] The bearing base 1 has a bearing surface 11 for bearing the target workpiece 2, the bearing surface 11 comprising a first bearing surface 111 and a second bearing surface 113, the first bearing surface 111 and the second bearing surface 113 being connected by a third bearing surface 112, the third bearing surface 112 being an arc surface;

[0041] The pressing assembly comprises a pressing body 3, the pressing body 3 comprising a pressing end surface 323, the pressing body 3 being movably arranged along the vertical direction, and at least part of the pressing body 3 being movably arranged along the horizontal direction, so that when the pressing body 3 is attached to the bearing base 1, the first part of the pin 202 is attached to the first bearing surface 111 and the second part of the pin 202 is attached to the second bearing surface 113 under the pressure of the pressing body 3, so that the first part of the pin 202 and the second part of the pin 202 form a bending part consistent with the curvature of the arc surface.

[0042] Specifically, in the present embodiment, the IGBT bending device provided by the present application is used for bending the pin 202 of the target workpiece 2, as shown in Figure 1As shown, the bending device comprises a bearing base 1, the bearing base 1 has a bearing surface 11 for bearing the target workpiece 2, which is an IGBT in this embodiment, wherein the bearing surface 11 comprises a first bearing surface 111 and a second bearing surface 113, and further comprises a third bearing surface 112 arranged between the first bearing surface 111 and the second bearing surface 113, wherein the third bearing surface 112 is an arc surface, the extension direction of the first bearing surface 111 is perpendicular to the extension direction of the second bearing surface 113, the bending device further comprises a pressing assembly, the pressing assembly comprises a pressing body 3, the pressing body 3 comprises a pressing end surface 323, the pressing end surface 323 is used to press the pin 202 of the target workpiece 2 placed on the bearing surface 11 into a set shape, the bending radius of the pin 202 after pressing is consistent with the bending radius of the third bearing surface 112, wherein the pressing body 3 is movably arranged in the vertical direction, at least part of the pressing body 3 can also be movably arranged in the horizontal direction, during the pressing process of the pin 202 of the target workpiece 2, at least part of the pressing body 3 moves in the horizontal direction while the pressing body 3 moves in the vertical direction, that is, the force acting on the pin 202 is inclined at an angle of 45 degrees relative to the first bearing surface 111, under the pressure of the pressing body 3, the first part of the pin 202 is pressed on and adheres to the first bearing surface 111, and the second part of the pin 202 is pressed on and adheres to the second bearing surface 113, because the pressing end surface 323 has an arc surface, the first part and the second part of the pin 202 can be pressed into a bending part consistent with the bending radius of the arc surface, thereby realizing the bending of the pin 202.

[0043] In the prior art, the pin bending of the IGBT is completed by directly vertical pressing of a right-angle die, which not only has low efficiency, but also easily produces excessive concentrated stress on the pin, thereby causing excessive bending, damage or even breakage of the pin, especially in the assembly of power electronic devices with high precision requirements.

[0044] In this embodiment, the bearing surface 11 of the bending device comprises the first bearing surface 111, the third bearing surface 112 (arc surface) and the second bearing surface 113, when the pressing end surface 323 of the pressing body 3 applies pressure to the pin 202 of the target workpiece 2 at an oblique angle of 45 degrees, the vertical stress acting on the pin 202 is effectively dispersed. The oblique force not only reduces the force component in the vertical direction, but also gently converts the force into a force along the pin bending path through the arc surface of the third bearing surface 112, thereby avoiding the high stress point produced when the pin is vertically pressed by the right-angle contact die, and significantly reducing the risk of pin damage.

[0045] The pressing end face 323 of the present application has an arc surface, which can accurately control the bending arc of the pin 202 when in contact with the pin 202 of the target workpiece 2, and ensure that it is consistent with the arc of the third bearing surface 112. The arc surface of the pressing end face 323 avoids the positional deviation and irregular shape of the pin 202 that may occur during bending, and improves the consistency and accuracy of the bending of the pin 202 of the IGBT.

[0046] Further, the pressing body 3 comprises a second pressing member 32 movably arranged in the horizontal direction, and the pressing end face 323 is arranged on the second pressing member 32, wherein the pressing end face 323 comprises an arc pressing surface, and the arc of the arc pressing surface is consistent with the arc of the third bearing surface 112.

[0047] Specifically, in the present embodiment, as shown in Figures 1 to 5 the pressing body 3 comprises a second pressing member 32, and the second pressing member 32 can move in the horizontal direction, wherein the pressing end face 323 is arranged on the second pressing member 32, and the pressing end face 323 has an arc surface, and the arc of the arc surface is consistent with the arc of the third bearing surface 112.

[0048] In the present embodiment, the arc of the arc surface of the pressing end face 323 is consistent with the arc of the third bearing surface 112, which can ensure that the pin 202 can be bent according to the preset arc during the pressing operation, without additional unnecessary deformation.

[0049] The conventional right-angle die concentrates the force point on a specific part of the pin 202 when bending the pin 202, resulting in extremely high local stress and increasing the risk of damage to the pin 202. In the present application, since the pressing end face 323 has an arc surface design, when it approaches the pin 202 in the horizontal direction, the force is uniformly distributed on the contact surface of the pin 202, avoiding the problem of excessive stress. The arc surface contact method makes the force act more gently on the pin 202, reducing the stress concentration in the vertical direction, thereby reducing the damage to the pin 202 during bending.

[0050] Through the fine movement in the horizontal direction, the second pressing member 32 can contact along the natural bending path of the pin 202, ensuring the accurate alignment of the pin 202 during bending. When the second pressing member 32 moves according to the preset path and contacts the pin 202, the bending arc of the pin 202 can match the arc of the third bearing surface 112, ensuring the consistency and accuracy of the bending.

[0051] Using the arc surface pressing end face 323, compared with the right-angle contact, the direct impact on the pin 202 can be reduced, thereby reducing the wear of the pressing body 3 and the bearing base 1.

[0052] Further, the second pressing member 32 comprises a first bending part 321 extending in a second direction;

[0053] A second bending part 322 is arranged on the first bending part 321 and extends in a first direction, the first bending part 321 has a first bending surface 3211, the second bending part 322 has a second bending surface 3222, and an arc-shaped pressing surface is arranged at the joint of the first bending surface 3211 and the second bending surface 3222, the first bending surface 3211, the second bending surface 3222 and the arc-shaped pressing surface jointly form a pressing end surface 323, when the second pressing member 32 moves in the horizontal direction, the first bending surface 3211 is fitted with at least part of the first bearing surface 111, the second bending surface 3222 is fitted with at least part of the second bearing surface 113, and the arc-shaped pressing surface is fitted with the third bearing surface 112, wherein the first direction is perpendicular to the second direction.

[0054] Specifically, the second pressing member 32 comprises the first bending part 321 and the second bending part 322, and further comprises a main body part 324, as shown in Figure 1 The two ends of the main body part 324 are respectively provided with two micro-motors, the driving end of each micro-motor is connected with a transmission rod 325, the free end of the transmission rod 325 is connected with the first bending part 321, the first bending part 321 extends in the second direction, the second direction is the horizontal direction, the second bending part 322 is arranged at the end of the first bending part 321 away from the transmission rod 325, the second bending part 322 extends in the first direction, the first direction is the vertical direction, the first direction is perpendicular to the second direction, the first bending part 321 has the first bending surface 3211, the second bending part 322 has the second bending surface 3222, and the arc-shaped pressing surface is arranged between the first bending surface 3211 and the second bending surface 3222, the curvature of the arc-shaped pressing surface is consistent with the curvature of the third bearing surface 112, the first bending surface 3211, the second bending surface 3222 and the arc-shaped pressing surface jointly form the pressing end surface 323, when the second pressing member 32 moves in the horizontal direction, the first bending surface 3211 is fitted with at least part of the first bearing surface 111, the second bending surface 3222 is fitted with at least part of the second bearing surface 113, and the arc-shaped pressing surface is fitted with the third bearing surface 112, so as to press and bend the pin 202.

[0055] In the embodiment of the present application, the second pressing member 32 is composed of a first bending part 321, a second bending part 322, a main body part 324, a micro motor and a transmission rod 325, etc. Among them, the micro motor at both ends of the main body part 324 can drive the transmission rod 325, and then control the first bending part 321 to extend or retract along the horizontal direction (second direction), while ensuring the second bending part 322 to move accurately along the vertical direction (first direction). The first bending part 321 and the second bending part 322 are connected by an arc-shaped pressing surface to form a pressing end surface 323, and the curvature of the arc-shaped pressing surface matches the curvature of the third bearing surface 112, which ensures that the pin 202 can be accurately and gently processed during bending.

[0056] The first bending surface 3211, the second bending surface 3222 and the arc-shaped pressing surface together form the pressing end surface 323. When it moves along the horizontal direction, the first bending surface 3211 contacts the first bearing surface 111, the second bending surface 3222 contacts the second bearing surface 113, and the key arc-shaped pressing surface is attached to the third bearing surface 112. This arrangement improves the consistency of bending and avoids electrical connection problems caused by inaccurate bending angle or position.

[0057] When pressing the pin 202, the force is dispersed on the arc surface of the pin 202 instead of being concentrated on a certain point, which not only reduces the stress on the local pin 202, but also reduces the risk of damage to the pin 202. In addition, the horizontal movement of the micro motor and the transmission rod 325 allows the second pressing member 32 to smoothly contact the pin 202, avoiding instantaneous impact force and further protecting the pin 202 from excessive stress.

[0058] By driving the transmission rod 325 with a micro motor, the second pressing member 32 can be automatically and accurately moved in the horizontal direction, which not only reduces the time of manual adjustment, but also reduces the possibility of operation error, significantly improving the automation production efficiency of the IGBT pin 202 bending.

[0059] The gentle contact of the arc-shaped pressing surface with the pin 202 reduces the wear of the equipment during the bending process, increases the service life of the equipment, and reduces the cost of long-term maintenance and replacement of parts. At the same time, reducing the damage to the pin 202 means reducing the scrap rate of IGBT, reducing material waste and saving production cost.

[0060] Further, the bearing base 1 is provided with a first positioning part, and the pressing body 3 further comprises:

[0061] The first pressing member 31 is movably arranged in the vertical direction, and the first pressing member 31 is provided with a second positioning part. The first pressing member 31 has a first position and a second position. When the first pressing member 31 moves to the first position, the first positioning part and the second positioning part are inserted to position the first pressing member 31.

[0062] When the first pressing member 31 continues to move downward to the second position, the pressing end surface 323 makes the first part of the pin 202 fit the first bearing surface 111, and the second part of the pin 202 fits the second bearing surface 113. The second pressing member 32 is arranged on the first pressing member 31.

[0063] Specifically, in this embodiment, the first positioning part is arranged on the bearing base 1, and the pressing body 3 further includes a first pressing member 31 movably arranged in the vertical direction. The first pressing member 31 is provided with a second positioning part. The first pressing member 31 has a first position and a second position. When the first pressing member 31 moves to the first position, the first positioning part and the second positioning part are inserted to position the first pressing member 31. Before the pin 202 is pressed, positioning is required, so as to improve the bending accuracy of the pin 202. After positioning, the first pressing member 31 continues to move downward to the second position, and the pressing end surface 323 makes the first part of the pin 202 fit the first bearing surface 111, and the second part of the pin 202 fits the second bearing surface 113. The second pressing member 32 is arranged on the first pressing member 31.

[0064] In this embodiment, the cooperation of the first positioning part on the bearing base 1 and the second positioning part on the first pressing member 31 of the pressing body 3, as well as the accurate positioning and pressing of the second pressing member 32, can further improve the bending accuracy of the pin 202 of the IGBT. The movement of the first pressing member 31 between the first position and the second position, in cooperation with the insertion positioning of the first positioning part and the second positioning part, ensures the accurate alignment of the pin 202 before bending, thereby improving the bending accuracy.

[0065] Before the pin 202 is bent, the first positioning part and the second positioning part are inserted to achieve accurate positioning of the pin 202 on the bearing base 1. This process ensures the alignment between the pin 202 and the first bearing surface 111 and the second bearing surface 113, thereby providing an accurate reference point for subsequent bending operations and improving the consistency and accuracy of the bending.

[0066] After positioning, the first pressing member 31 continues to move in the vertical direction to a second position, at which time its pressing end face 323, especially the arc-shaped pressing face, is in contact with the pin 202. Since the pressing end face 323 has an arc that matches the third bearing face 112, the pin 202 can bend along a preset arc path during pressing, rather than a right-angle mutation. This design reduces stress concentration during bending of the pin 202, protects the integrity of the pin 202, reduces the risk of breakage or deformation of the pin 202, and thus improves the assembly quality and overall performance of the IGBT.

[0067] The first pressing member 31 can move in the vertical direction to a preset first position and a second position, cooperating with the positioning portion on the bearing base 1 to speed up the production of bending of the pin 202 of the IGBT and improve the overall production efficiency.

[0068] In addition, the movement speed of the first pressing member 31 and the second pressing member 32 in the present technical solution is consistent, and the distance between the two and the target workpiece 2 should also be consistent during movement. In this way, the first pressing member 31 and the second pressing member 32 can move at the same speed when pressing the pin 202, and can simultaneously act on the first part and the second part of the pin 202, thereby realizing the application of a 45-degree directional force to the surface of the pin 202, so as to form a bending part between the first part and the second part of the pin 202 consistent with the arc of the arc-shaped face.

[0069] In the IGBT bending device design of the present technical solution, the movement speed of the first pressing member 31 and the second pressing member 32 is consistent, and the distance between the two and the target workpiece 2 is also always the same during movement. This design ensures the balance and accuracy of the pressing operation, especially when the first part and the second part of the pin 202 are simultaneously pressed to form a bending part consistent with the arc of the arc-shaped face. Compared with the direct vertical pressing method of the prior art, the stress borne by the pin 202 during bending is effectively reduced, the risk of damage to the pin 202 is reduced, and the yield of the IGBT is ensured.

[0070] The traditional direct vertical pressing method is prone to produce highly concentrated stress at the bending part of the pin 202 due to the single point and direction of the force, which can cause deformation or damage to the pin 202. In the present technical solution, the first pressing member 31 and the second pressing member 32 approach the two ends of the pin 202 at the same speed and distance, forming a symmetrical pressure distribution. This design ensures that the stress distribution of the pin 202 during bending is more balanced, significantly reduces the risk of damage caused by local stress, and improves the yield and reliability of the IGBT.

[0071] The synchronous movement design of the first pressing member 31 and the second pressing member 32 enables both ends of the pin 202 to simultaneously contact the first bearing surface 111 and the second bearing surface 113, and form an accurate bending angle with the arc-shaped third bearing surface 112.

[0072] During the bending process, the first part and the second part of the pin 202 are subjected to synchronous pressing action of the first pressing member 31 and the second pressing member 32, and are bent along a pre-designed arc-shaped path. This path design reduces unnecessary bending and stretching of the pin 202 during the bending process, further reduces stress, protects the structural integrity and electrical performance of the pin 202, and improves the manufacturing quality and production efficiency of the IGBT.

[0073] Further, the first positioning part includes a first positioning protrusion or a first positioning groove, and the second positioning part includes a second positioning groove matched with the first positioning protrusion or a second positioning protrusion matched with the first positioning groove.

[0074] Specifically, the first positioning part can be a first positioning protrusion or a first positioning groove. When the first positioning part is a first positioning protrusion, the second positioning part is a second positioning groove matched with the first positioning protrusion. When the first positioning part is a first positioning groove, the second positioning part is a second positioning protrusion matched with the first positioning groove.

[0075] In this embodiment, the matching design of the first positioning part and the second positioning part provides two different implementation schemes: the first positioning part can be a first positioning protrusion, and correspondingly, the second positioning part is designed as a second positioning groove, and vice versa. This complementary positioning design ensures the accuracy and firmness of positioning, and no matter which scheme is selected, accurate positioning of the pin 202 on the bearing base 1 can be achieved. This setting mode helps to adapt to the shape and size of the pin 202 of different IGBT models, and widens the application range of the equipment.

[0076] The accurate matching of the first positioning part and the second positioning part is a prerequisite for ensuring the bending accuracy of the pin 202. Whether through the nesting of the first positioning protrusion and the second positioning groove, or the fitting of the first positioning groove and the second positioning protrusion, the pin 202 can be ensured to be in the correct initial position before bending, avoiding the situation that the bending angle is inaccurate or the pin 202 does not fit well with the bearing surface due to positioning deviation.

[0077] During the movement of the second pressing member 32 in the horizontal direction and the vertical downward movement of the first pressing member 31, the two work cooperatively to press the pin 202 through the pressing end surface 323, so as to realize the bending of the pin 202. This positioning and pressing mode ensures the consistency and accuracy of the bending of the pin 202, and improves the reliability of the electrical connection and the overall performance of the IGBT assembly.

[0078] By adopting the positioning of the matching of the protrusions and the grooves, the complexity and possible faults of the equipment in the positioning process are reduced, and the maintenance and calibration costs are reduced.

[0079] To sum up, the matching design of the first positioning part and the second positioning part in the application enhances the flexibility and applicability of the IGBT bending equipment by providing two complementary positioning schemes, ensures high positioning accuracy, and further optimizes the effect of the pin 202 bending. This setting method not only improves the reliability of electrical connection, but also improves the production efficiency through cost control.

[0080] Further, the bearing base 1 comprises a bearing part having a bearing surface 11, and the bearing part is provided with a mounting groove 12 extending along the length or width direction of the bearing base 1, the mounting groove 12 is used to accommodate the target workpiece 2, and at least part of the first bearing surface 111 is the groove bottom surface of the mounting groove 12.

[0081] Specifically, the bearing base 1 comprises a bearing part having a bearing surface 11, and the bearing part is provided with a mounting groove 12, the mounting groove 12 is a strip-shaped groove, as shown in Figure 2 The mounting groove 12 extends along the length direction of the bearing part, the number of the mounting groove 12 is two, and the two mounting grooves 12 are arranged in the width direction of the bearing part, a plurality of first positioning protrusions or a plurality of second positioning grooves are arranged between the two mounting grooves 12, each mounting groove 12 can accommodate a plurality of target workpieces 2, and at least part of the first bearing surface 111 is the groove bottom surface of the mounting groove 12.

[0082] Meanwhile, the first positioning part on the bearing part can also be the first positioning protrusion and the first positioning groove arranged alternately, or the first positioning part is all the first positioning protrusion, or the first positioning part is all the first positioning groove.

[0083] The bearing part of the bearing base 1 is provided with a strip-shaped groove mounting groove 12, which provides a stable basis for placing a plurality of target workpieces 2 (such as IGBT). The mounting groove 12 extends along the length direction of the bearing part and is arranged in the form of two grooves in parallel in the width direction, which not only saves space, but also improves the yield of single processing, thereby enhancing the production efficiency.

[0084] The design flexibility of the first positioning part, i.e., the first positioning protrusions or the second positioning grooves, or the first positioning protrusions and the first positioning grooves arranged alternately, or the single type of protrusions or grooves distributed throughout the area between the mounting grooves 12, embodies the adaptability of the technical solution to different IGBT models and the pursuit of positioning accuracy. The design provides a stable positioning reference for pins 202 of different sizes and shapes, ensuring that the pins 202 can be accurately aligned with the first bearing surface 111 and the second bearing surface 113 during the pressing process, avoiding bending angle deviation or damage to the pins 202 caused by inaccurate positioning.

[0085] The diversified design of the first positioning part enables the bearing base 1 to be flexibly adjusted according to the characteristics of different target workpieces 2, ensuring that each target workpiece 2 can obtain the most suitable positioning on the bearing base 1.

[0086] The design of the mounting grooves 12 allows multiple target workpieces 2 to be placed on the bearing base 1 at the same time, enabling the first pressing member 31 and the second pressing member 32 to accurately bend multiple pins 202 in one stroke, greatly improving the production yield and overall production efficiency of single processing. In addition, the efficient positioning function of the first positioning part reduces the preparation time and positioning error, further accelerating the production process.

[0087] The optimized design of the bearing base 1 reduces the need for manual positioning of individual workpieces, reducing labor costs and uncertainties in operation, while its support for multiple IGBTs also reduces issues such as reduced production efficiency caused by equipment or tool replacement.

[0088] Further, the bearing base 1 further comprises:

[0089] The support base 14 is provided on the side of the bearing part away from the mounting grooves 12, and the support base 14 is provided with a first connecting site. The bearing part is provided with a second connecting site corresponding to the first connecting site. The bending device further comprises a connecting part, which is insertable through the first connecting site to fix the bearing part and the support base 14 through the first connecting site and the second connecting site.

[0090] Specifically, the bearing base 1 further comprises a supporting base 14, which is detachably connected with the bearing part. The first connecting position is provided on the supporting base 14, and the second connecting position corresponding to the first connecting position is provided on the bearing part. The connecting part is inserted into the first connecting position to fix the bearing part and the supporting base 14 through the first connecting position and the second connecting position. The first connecting position and the second connecting position are both connecting holes, and the connecting part is a connecting bolt. Because of the detachable connection between the bearing base 1 and the supporting base 14, the corresponding bearing base 1 can be replaced for different sizes of IGBTs.

[0091] The detachable connection is designed between the bearing base 1 and the supporting base 14. Specifically, the first connecting position is provided on the supporting base 14, and the second connecting position corresponding to the first connecting position is provided on the bearing part. The connecting bolt is used as the connecting part to tightly fix the two parts to meet the needs of the pin 202 bending of the IGBT of different models.

[0092] The detachable connection enables the quick replacement of the bearing base 1 without adjusting the structure of the whole bending device. This is particularly important for processing IGBTs with different sizes of pins 202. When switching between different models of IGBTs, the accuracy and consistency of the bending operation can be ensured by simply replacing the matching bearing base 1 without stopping the machine for complex adjustments.

[0093] In the production environment of IGBTs of different models, the bearing base 1 with detachable connection design significantly improves the production efficiency. Because the replacement operation of the bearing base 1 is simple and fast, the production line can quickly adapt to IGBTs with different sizes of pins without long downtime for adjustment, thereby shortening the product switching time and improving the production rhythm.

[0094] When the bearing base 1 needs to be replaced or maintained, the connecting bolt only needs to be operated to easily remove the bearing base 1 for processing without touching the main structure of the equipment, thereby simplifying the operation process.

[0095] Further, the device further comprises:

[0096] The limiting part 13 is provided on the bearing surface 11, and the limiting part 13 has a limiting gap. At least part of the pin 202 of the target workpiece 2 is clamped in the limiting gap.

[0097] Specifically, the bending device further comprises a limiting part 13 provided on the bearing surface 11, as shown in Figure 2 and Figure 3 The limiting gap is formed in the limiting part 13, and part of the pin of the target workpiece 2 is clamped in the limiting gap to limit the position of the pin 202 to avoid the pin 202 from deviating during the bending process.

[0098] The limiting portion 13 in the bending device is designed on the bearing surface 11, forming a limiting gap, which functions to limit a part of the pin 202 of the target workpiece 2 (such as IGBT), ensuring that the pin 202 maintains a stable position during the bending process, avoiding any unnecessary deviation. The presence of the limiting portion 13 provides a solid physical support for the precise bending of the pin 202.

[0099] The limiting portion 13 traps a part of the pin 202 through the limiting gap it forms, thereby firmly fixing the position of the pin 202 during the bending process. This design can prevent the pin 202 from deviating under external force through physical constraint, ensuring the consistency and accuracy of the pin 202 bending angle, improving the assembly precision of IGBT and the reliability of electrical connection. In actual production, the position control of the pin 202 is directly related to the performance of IGBT, and any slight deviation may cause electrical connection problems, or even pin damage, therefore, it is necessary to ensure that the pin 202 does not deviate during the bending process.

[0100] The addition of the limiting portion 13 not only improves the stability of the bending device, but also indirectly promotes the improvement of production efficiency. During the bending process, the fixed state of the pin 202 ensures the continuity and stability of the bending action, reduces the repeated work or defective products caused by the deviation of the pin 202, and reduces the waste rate in production, thereby improving the output rate and overall efficiency of the production line.

[0101] The precise limitation of the limiting portion 13 to the pin 202 reduces the damage and material waste of the pin 202, and reduces the loss cost in the production process. At the same time, the consistency and accuracy of the bending of the pin 202 improve the yield of IGBT products, which reduces the additional cost of reassembly and defective product processing in the long run. In terms of equipment maintenance, the stability and durability of the limiting portion 13 reduce the frequent maintenance caused by component wear and tear, prolong the service life and operation cycle of the equipment.

[0102] Further, the limiting portion 13 is arranged on the first bearing surface 111 and / or the second bearing surface 113; the second bearing surface 113 comprises a first sub-surface and a second sub-surface, the first sub-surface is an arc surface, and the second sub-surface is a vertical surface.

[0103] Specifically, as shown in Figure 3 , the limiting portion 13 can be arranged on the first bearing surface 111 alone to limit the root of the pin 202;

[0104] Alternatively, the limiting portion 13 can also be arranged on the second bearing surface 113 alone. When arranged on the second bearing surface 113, the length of the limiting portion 13 can be consistent with the height of the second bearing surface 113, or the limiting portion 13 can be arranged on a part of the second bearing surface 113, and the tail middle part of the lead 202 can be limited.

[0105] Alternatively, the limiting portion 13 can also be arranged on the third bearing surface 112 alone. When the limiting portion 13 is arranged on the third bearing surface 112 alone, the curvature of the limiting portion 13 is consistent with the curvature of the third bearing surface 112.

[0106] Alternatively, the limiting portion 13 can also be arranged on the side wall of the support base 14 corresponding to the second bearing surface 113.

[0107] Alternatively, the limiting portion 13 can be arranged on the first bearing surface 111 and the third bearing surface 112 simultaneously.

[0108] Alternatively, the limiting portion 13 can be arranged on the third bearing surface 112 and the second bearing surface 113 simultaneously.

[0109] Alternatively, the limiting portion 13 can be arranged on the first bearing surface 111, the second bearing surface 113, and the third bearing surface 112 simultaneously.

[0110] Alternatively, the limiting portion 13 can be arranged on the first bearing surface 111, the second bearing surface 113, the third bearing surface 112, and the side wall of the support base 14 simultaneously.

[0111] Alternatively, the limiting portion 13 can be arranged on the first bearing surface 111 and the side wall of the support base 14 simultaneously.

[0112] In addition, the limiting portion 13 in the present application can also be arranged on the first bending surface 3211 corresponding to the lead 202.

[0113] Alternatively, the limiting portion 13 is arranged on the second bending surface 3222 corresponding to the lead 202.

[0114] Alternatively, the limiting portion 13 is arranged on the first bending surface 3211 and the second bending surface 3222 simultaneously.

[0115] Alternatively, the limiting portion 13 can also be arranged on the arc-shaped surface connecting the first bending surface 3211 and the second bending surface 3222.

[0116] In the bending device of the present application, the limiting portion 13 can be arranged on the first bearing surface 111, the second bearing surface 113, the third bearing surface 112, the side wall of the support base 14, and the first bending surface 3211 and the second bending surface 3222 alone or in combination, so as to limit the specific parts of the lead 202 in multiple ways.

[0117] The limiting portion 13 is arranged on the first bearing surface 111 to limit the root of the pin 202, preventing displacement of the root during bending; when the limiting portion 13 is arranged on the second bearing surface 113, it can cover the entire surface or part of the surface to fix the tail or middle part of the pin 202, avoiding the swing of the pin end during bending.

[0118] The limiting portion 13 is consistent with the arc shape of the third bearing surface 112, ensuring the stability of the pin 202 when bending to the arc-shaped path. The curvature of the limiting portion 13 perfectly matches the third bearing surface 112, so that the pin 202 is precisely controlled at every step during the bending process, avoiding deviation of the bending path from the designed trajectory, thereby ensuring that the shape of the bent pin 202 meets the design requirements, enhancing the electrical performance and structural reliability of the IGBT component.

[0119] The limiting portion 13 can be arranged on the first bearing surface 111, the second bearing surface 113, and the third bearing surface 112, and even extend to the side wall of the support base 14 and the first bending surface 3211, the second bending surface 3222, and the connecting arc surface between the two. This all-around limiting method provides more comprehensive physical constraints for the pin 202, and no matter which part of the pin 202, it can be effectively supported and positioned during the bending process.

[0120] The multi-directional limiting portion 13 design enables the bending device to adapt to IGBTs and pins 202 of different sizes and shapes, widening the application range of the equipment, reducing the need to frequently replace jigs due to changes in workpiece models, thereby reducing production costs and equipment maintenance costs.

[0121] The multi-directional limiting portion design in the present application significantly improves the stability of the pin 202 during bending by arranging the limiting portion 13 at different positions of the bearing surface 11 and the arc-shaped connection between the bending surfaces, ensuring bending precision and the electrical connection quality of the IGBT component.

[0122] Further, the limiting portion 13 includes a plurality of limiting blocks 131 arranged along the length or width direction of the bearing base 1, and a limiting gap is formed between each adjacent two limiting blocks 131.

[0123] Specifically, each limiting portion 13 includes a plurality of limiting blocks 131 arranged along the length or width direction of the bearing base 1, and a limiting gap is formed between each adjacent two limiting blocks 131.

[0124] The design of the limiting part 13 adopts the concept of an array of limiting blocks 131, that is, a plurality of independent limiting blocks 131 are regularly arranged along the length or width direction on a bearing base 1, and a limiting gap is naturally formed between each adjacent two limiting blocks 131, which is used to clamp a specific part of the pin 202 to ensure the stability and accuracy of the pin 202 during the bending process.

[0125] The embodiment of the present application provides a kind of energy storage converter, including power board 4, power board 4 is equipped with target workpiece 2, which is made of the IGBT bending device described above, the pin 202 of target workpiece 2 includes first part and second part, first part and second part have arc bending part between, first part is located at the first side of power board 4, second part passes through power board 4 to the second side of power board 4, to be welded with power board 4.

[0126] Specifically, the embodiment of the present application provides an energy storage converter, which is positioned with a target workpiece 2 on the power board 4, and the pin 202 of the target workpiece 2 has an arc-shaped bending portion between the first and second portions. This design ensures the smoothness and structural stability of the bending portion during the process of the pin 202 passing through the power board 4 and being welded to the second side.

[0127] By reducing the stress concentration at the bending point, the stability of the pin 202 and the power board 4 welding is improved. The traditional right-angle bending method often generates a large stress at the bending point, which may cause the pin 202 to break or the electrical contact to be poor under long-term operation. The introduction of the arc-shaped bending portion disperses the stress at the bending point, reduces the risk of the pin 202 breaking under complex thermal cycling and mechanical impact, and thus improves the reliability of the electrical connection and the service life of the energy storage converter.

[0128] Further, the target workpiece 2 further includes a body 201, and the pin 202 is arranged on the body 201. The power board 4 is further provided with a plurality of mounting components, and the plurality of mounting components are located on the first side of the power board 4 and used to fix the body 201.

[0129] Further, the mounting component is provided with a receiving groove 6, and at least part of the body 201 is embedded in the receiving groove 6. The mounting component is connected with the power board 4 to fix the body 201.

[0130] Further, the length of the pin 202 at the second side is greater than the length of the pin 202 at the first side; and / or, the receiving groove 6 has a groove surface matching the bending portion of the pin 202.

[0131] The application further optimizes the connection and fixation method of the target workpiece 2 and the power board 4. A plurality of mounting components are arranged on the first side of the power board 4, each mounting component is provided with a receiving groove 6, each receiving groove 6 is provided with a corresponding mounting cover 7, and the receiving groove 6 is used for embedding and fixing the body 201 of the target workpiece 2. The pin 202 is designed to have a length greater on the second side of the power board 4 than on the first side, and the groove surface of the receiving groove 6 matches the bent part of the pin 202.

[0132] The body 201 of the target workpiece 2 is partially embedded in the receiving groove 6 of the mounting component, forming mechanical positioning and fixation, avoiding displacement of the body due to thermal expansion and contraction or mechanical vibration, thereby enhancing the stability of electrical connection. The precise matching design of the receiving groove 6 and the body 201 ensures the structural accuracy and firmness during installation, effectively reduces the risk of poor electrical contact and pin 202 damage, and improves the overall performance and service life of the energy storage converter.

[0133] The longer length design of the pin 202 on the second side of the power board 4 increases the contact area of the pin 202 with the cooling system, improves the heat dissipation efficiency, especially under high power application. At the same time, the longer pin 202 on the second side also allows more flexible layout design, optimizing the space utilization of the power board 4, so that the energy storage converter can integrate more electrical components, improving system output power and efficiency.

[0134] By precisely matching the bent part of the pin 202 with the groove surface in the receiving groove 6, the alignment and fixation steps during assembly are simplified. This design allows the pin 202 to be bent and fixed with the body 201 in one body, reducing assembly time and improving production efficiency. In addition, the use of mounting components can also flexibly adjust their position and number according to different target workpiece 2 sizes and shapes, enhancing the adaptability and flexibility of the production line.

[0135] The connection design between the mounting component and the power board 4 not only simplifies the manufacturing process, but also reduces maintenance costs. When the target workpiece 2 needs to be replaced, only the mounting component needs to be disassembled, without any modification to the power board 4, reducing equipment downtime and maintenance complexity. In addition, the standardized design of the mounting component facilitates mass production, reduces manufacturing costs, and also facilitates spare parts management and replacement.

[0136] The embodiment of the application provides an energy storage system, which comprises the energy storage converter.

[0137] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0138] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the art. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is understood that the item will be present.

[0139] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", and "top", "bottom" are generally based on the orientation or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0140] For purposes of the description hereinafter, the orientations in the various drawings will be described as shown in the drawings. However, it will be understood that the device can assume different orientations, e.g. viewed from the bottom, based on the application. Accordingly, the illustrative terms such as "above", "below", "upper", "lower", and the like are used as a shorthand notations to convey the relative positions of an object or feature as shown in the figures. It will be further appreciated that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device described is turned over, then a depiction that was previously described as "above" other parts or steps would then be oriented "below" other parts or steps. Thus, the exemplary term "above" can encompass both an "above" and "below" position depending on the particular orientation being referred to. Similarly, the terms "above" and "below" can include vertical orientations of the device as well as horizontal orientations of the device. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0141] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only intended to facilitate the distinction of the corresponding parts, and does not have a special meaning unless otherwise stated, and therefore cannot be understood as a limitation of the scope of protection of the present application.

[0142] The preferred embodiments of the present application have been described above with the purpose to enable not to limit the scope of protection of the present application. As a person skilled in the art can make various modifications and variations to the present application without departing from the spirit and principles of the present application, it should be understood that any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall fall within the scope of the present application.

Claims

1. An IGBT bending device for bending a pin (202) of a target workpiece (2), characterized in that, The bending device comprises: A bearing base (1) having a bearing surface (11) for bearing a target workpiece (2), the bearing surface (11) comprising a first bearing surface (111) and a second bearing surface (113), the first bearing surface (111) and the second bearing surface (113) being connected by a third bearing surface (112), the third bearing surface (112) being an arc surface; A pressing assembly comprising a pressing body (3) comprising a pressing end surface (323), the pressing body (3) being movably arranged in a vertical direction, and at least a part of the pressing body (3) being movably arranged in a horizontal direction, so that when the pressing body (3) is attached to the bearing base (1), the first part of the pin (202) is attached to the first bearing surface (111) and the second part of the pin (202) is attached to the second bearing surface (113) under the pressure of the pressing body (3), so that the bending part between the first part and the second part of the pin (202) is consistent with the arc of the arc surface; The pressing body (3) comprises a second pressing member (32) movably arranged in the horizontal direction, the pressing end surface (323) being arranged on the second pressing member (32), the pressing end surface (323) comprising an arc pressing surface, the arc of the arc pressing surface being consistent with the arc of the third bearing surface (112); The bearing base (1) is provided with a first positioning part, and the pressing body (3) further comprises: A first pressing member (31) movably arranged in the vertical direction, the first pressing member (31) being provided with a second positioning part, the first pressing member (31) having a first position and a second position, when the first pressing member (31) moves to the first position, the first positioning part and the second positioning part are inserted to position the first pressing member (31); When the first pressing member (31) continues to move downward to the second position, the pressing end surface (323) makes the first part of the pin (202) attached to the first bearing surface (111) and the second part of the pin (202) attached to the second bearing surface (113), wherein the second pressing member (32) is arranged on the first pressing member (31).

2. The IGBT bending apparatus according to claim 1, characterized by The second pressing member (32) comprises: A first bending part (321) extending in a second direction; A second bending component (322) is arranged on the first bending component (321), the second bending component (322) extends along a first direction, the first bending component (321) has a first bending surface (3211), the second bending component (322) has a second bending surface (3222), and the first bending surface (3211) and the second bending surface (3222) are connected to form the arc-shaped pressing surface, the first bending surface (3211), the second bending surface (3222), and the arc-shaped pressing surface together form the pressing end surface (323), so that when the second pressing component (32) moves along the horizontal direction, the first bending surface (3211) is fitted with at least part of the first bearing surface (111), the second bending surface (3222) is fitted with at least part of the second bearing surface (113), and the arc-shaped pressing surface is fitted with the third bearing surface (112), wherein the first direction is perpendicular to the second direction.

3. The IGBT bending apparatus according to claim 1, characterized by The first positioning part comprises a first positioning protrusion or a first positioning groove, and the second positioning part comprises a second positioning groove matched with the first positioning protrusion or a second positioning protrusion matched with the first positioning groove.

4. The IGBT bending apparatus according to claim 1, characterized by The bearing base (1) comprises: A bearing component having the bearing surface (11), the bearing component is provided with a mounting groove (12) extending along the length or width direction of the bearing base (1), the mounting groove (12) is used for accommodating the target workpiece (2), and at least part of the first bearing surface (111) is a groove bottom surface of the mounting groove (12).

5. The IGBT bending apparatus according to claim 4, characterized by The bearing base (1) further comprises: A support base (14) provided on a side of the bearing component away from the mounting groove (12), the support base (14) is provided with a first connecting position, the bearing component is provided with a second connecting position corresponding to the first connecting position, and the bending device further comprises a connecting component which can be inserted into the first connecting position to fix the bearing component and the support base (14) through the first connecting position and the second connecting position.

6. The IGBT bending apparatus according to claim 1, characterized by The device further comprises: A limiting part (13) arranged on the bearing surface (11), the limiting part (13) has a limiting gap, and at least part of the pin (202) of the target workpiece (2) is clamped in the limiting gap.

7. The IGBT bending apparatus according to claim 6, characterized by The limiting part (13) is arranged on the first bearing surface (111) and / or the second bearing surface (113); the second bearing surface (113) comprises a first sub-surface and a second sub-surface, the first sub-surface is an arc-shaped surface, and the second sub-surface is a vertical surface.

8. The IGBT bending apparatus according to claim 6, characterized by The limiting part (13) comprises a plurality of limiting blocks (131) arranged along the length or width direction of the bearing base (1), and the limiting gap is formed between every two adjacent limiting blocks (131).

9. An energy storage converter comprising a power board (4), characterized in that The power plate (4) is provided with a target workpiece (2), the target workpiece (2) is made of the IGBT bending device of any one of claims 1 to 8, a pin (202) of the target workpiece (2) comprises a first part and a second part, the first part and the second part have an arc-shaped bending part therebetween, the first part is located on a first side of the power plate (4), and the second part passes through the power plate (4) to a second side of the power plate (4) to be welded with the power plate (4).

10. The energy storage converter of claim 9, wherein, The target workpiece (2) further comprises a body (201), the pin (202) is arranged on the body (201), and the power plate (4) is further provided with a plurality of mounting components, the plurality of mounting components are located on the first side of the power plate (4) and are used for fixing the body (201).

11. The energy storage converter of claim 10, wherein, The mounting component is provided with a receiving groove (6), at least part of the body (201) is embedded in the receiving groove (6), and the mounting component is connected with the power plate (4) to fix the body (201).

12. The energy storage converter of claim 11, wherein, The length of the pin (202) on the second side is greater than the length of the pin (202) on the first side; and / or the receiving groove (6) has a groove surface matched with the bending part of the pin (202).

13. An energy storage system characterized by, The energy storage converter comprises the power converter of any one of claims 11 to 12. The energy storage converter comprises the power converter of any one of claims 11 to 12.

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