Laminated busbar assembly and power module

Abstract

The utility model belongs to the field of busbar connecting piece design, and particularly relates to a laminated busbar assembly and a power module, the power module comprises a shell and a plurality of capacitors arranged in the shell, the plurality of capacitors are conductively connected through the laminated busbar assembly, the laminated busbar assembly comprises a laminated busbar main body used for being connected with an IGBT and at least one group of conductive connecting pieces, the laminated busbar main body is provided with the capacitor connecting structure, and the conductive connecting piece can realize the connection between other capacitors and the laminated busbar main body, so that the laminated busbar main body can be matched with a corresponding number of satellite-type conductive connecting pieces to connect a plurality of capacitors, and a conventional mode of increasing the number and the capacity of the capacitors by increasing the area is replaced; and the specification of the laminated busbar is reduced, and the serialization design of the power module is realized under the condition of lower cost.

Description

Technical Field

[0001] The utility model belongs to the field of busbar connector design, in particular to a laminated busbar component and a power module. Background Art

[0002] The power module is the core component for realizing the functions of energy storage inverters, SVG and other products in the power electronics industry. It includes a laminated busbar, multiple capacitors, IGBTs and a heat sink. The capacitors and IGBTs are connected through the laminated busbar, and the IGBTs are fitted with the heat sink to cool the IGBTs through the heat sink.

[0003] At present, the assembly structure of the traditional power module is that the stacked busbar is directly connected to all the capacitors, such as the assembly structure of the IGBT power module disclosed in the Chinese invention patent with authorization announcement number CN112421934B and authorization announcement date September 6, 2022, and the IGBT power module using the assembly structure, which is arranged with ten capacitors in two rows and five columns. The size of the stacked busbar is sufficient to cover all the capacitors, and a plurality of capacitor connection structures corresponding to the number of capacitors are arranged on the stacked busbar, each capacitor connection structure includes a conductive connection structure respectively used to connect to the positive and negative electrodes of the corresponding capacitors, and the stacked busbar is directly connected to all the capacitors through the capacitor connection structure.

[0004] In actual production, different types of power modules have different numbers of capacitors. If the laminated busbars in the prior art are designed to cover all capacitors, when producing other types of power modules with fewer capacitors, such as other types of power modules in the same series with the same structure but less than ten capacitors as the power modules in the prior art, some areas of the laminated busbars will be idle, resulting in waste of the laminated busbars. The manufacturing cost of the laminated busbars is relatively high, which in turn increases the manufacturing cost of power modules with less than ten capacitors. If laminated busbars of corresponding sizes and types are set for different types of power modules, it is necessary to manufacture laminated busbars of a series of sizes and types, resulting in high manufacturing costs for the laminated busbars, which in turn leads to higher manufacturing costs for the power modules. Utility Model Content

[0005] The purpose of the utility model is to provide a laminated busbar assembly to solve the technical problem in the prior art that when producing different types of power modules, the single-size laminated busbar is wasted when used for power modules with a small number of capacitors, resulting in high manufacturing costs for the corresponding power modules, or that laminated busbars of a series of sizes need to be set for corresponding series models of power modules, resulting in high manufacturing costs for the power modules. The purpose of the utility model is also to provide a power module using the above-mentioned laminated busbar assembly to solve the technical problem in the prior art that the cost of power modules is high when they are produced in series.

[0006] To achieve the above object, the technical solution of the laminated busbar assembly provided by the present utility model is as follows:

[0007] A laminated busbar assembly includes a laminated busbar main body and at least one set of conductive connectors. The laminated busbar main body has an IGBT connection structure for electrically connecting an IGBT and a capacitor connection structure for electrically connecting a capacitor that can be covered by the laminated busbar main body. Each set of conductive connectors includes two conductive connectors. One end of the conductive connector has an electrode connection structure for connecting one of the electrodes of a capacitor that cannot be directly connected to the laminated busbar main body through its capacitor connection structure, and the other end has a busbar connection structure for detachably and electrically connecting to the capacitor connection structure of the laminated busbar main body, so that the laminated busbar main body can connect to a capacitor that cannot be covered by the laminated busbar main body through the conductive connector.

[0008] As a further improvement, the laminated busbar assembly includes multiple sets of conductive connectors, and one or two sets of conductive connectors are provided with at least two electrode connection structures. The conductive connector provided with at least two electrode connection structures is defined as a multi-point conductive connector. The electrode connection structures on the multi-point conductive connector are arranged at intervals along the direction away from the laminated busbar main body, and the multi-point conductive connector is split and detachably connected between at least a pair of adjacent two electrode connection structures.

[0009] As a further improvement, the multi-point conductive connector has an upper side edge and a lower side edge that are opposite to each other up and down, and a vertical edge connecting between the upper side edge and the lower side edge. The upper side edge and the lower side edge are correspondingly provided with electrode connection structures.

[0010] As a further improvement, the multi-point conductive connector is assembled by two L-shaped members. A set of folded edges of the two L-shaped members are arranged opposite to each other up and down to form the upper side edge and the lower side edge, and the other set of folded edges at least partially overlap and cooperate with each other to form the vertical edge, and fixing holes are opened in the overlapping part. The detachable connection between the two L-shaped members is realized by passing fasteners through the fixing holes. One end of the folded edge forming the lower side edge away from the vertical edge has the busbar connection structure.

[0011] As a further improvement, the IGBT connection structure is arranged in the middle of the laminated busbar main body, and multiple sets of conductive connectors are arranged on both sides of the laminated busbar main body.

[0012] As a further improvement, the capacitor connection structure is two through holes penetrating the laminated busbar main body, and a connection hole matching the corresponding through hole is opened at one end of the conductive connector that cooperates with the laminated busbar main body, so that the capacitor connection structure can be used to connect the conductive connector.

[0013] As a further improvement, the IGBT connection structure of the laminated busbar body is arranged in the middle of the laminated busbar body and is arranged in two rows at intervals, so as to form a radiator installation area for installing a radiator between the two rows of IGBTs after the IGBTs are installed.

[0014] The beneficial effects are as follows: The laminated busbar assembly provided by the present invention belongs to a novel busbar structure for connecting multiple capacitors and is a pioneering invention. Since the laminated busbar assembly includes a laminated busbar body and a conductive connecting piece, a capacitor connection structure for connecting the capacitors that can be covered by the laminated busbar body is arranged on the laminated busbar body. As a satellite-type conductive connecting piece, the conductive connecting piece can connect the capacitors that cannot be covered by the laminated busbar body. Thus, when producing a series of power modules, according to the number of capacitors in the power module, it is possible to select to use the laminated busbar body to match the corresponding number of satellite-type conductive connecting pieces to achieve the conductive connection of all capacitors with the laminated busbar body. By such a combination of the laminated busbar body and the conductive connecting piece, the size of the laminated busbar body can be made relatively small, and any conductive connecting piece suitable for this can be used for the conductive connecting piece. It is possible to conductively connect the satellite capacitors (capacitors that cannot be covered by the laminated busbar body) with the laminated busbar body without increasing the specifications of the laminated busbar, realizing an increase in the number and capacity of the arranged capacitors. The conductive connecting piece replaces the conventional way of increasing the area of the laminated busbar to achieve an increase in the number and capacity of capacitors. It not only reduces the specifications of the laminated busbar, but also the cost of increasing the number of conductive connecting pieces is much lower than the cost of increasing the area of the laminated busbar. For different models of power modules, by keeping the busbar body unchanged and increasing the number of conductive connecting pieces, the series design of the power module can be realized at a relatively low cost, avoiding the situation where part of the laminated busbar area is left vacant and wasted when the laminated busbar is made larger to meet the connection with multiple capacitors but is applied to a power module with a small number of capacitors. There is no need to set laminated busbars of series sizes for series models of power modules, reducing the manufacturing or procurement cost of the busbar for connecting capacitors, and thus reducing the manufacturing cost of the power module.

[0015] To achieve the above object, the technical solution of the power module provided by the present invention is:

[0016] A power module includes a housing and a plurality of capacitors disposed within the housing. The plurality of capacitors are electrically connected through a laminated busbar assembly. The laminated busbar assembly includes a laminated busbar body and at least one set of conductive connecting members. The laminated busbar body has an IGBT connection structure for connecting an IGBT and a capacitor connection structure for electrically connecting the capacitors that can be covered by the laminated busbar body. Each set of conductive connecting members includes two conductive connecting members. One end of the conductive connecting member has an electrode connection structure for connecting one of the electrodes of a capacitor that cannot be directly connected to the laminated busbar body through its capacitor connection structure, and the other end has a busbar connection structure for detachably electrically connecting to the capacitor connection structure of the laminated busbar body, so that the laminated busbar body can connect to the capacitors that cannot be covered by the laminated busbar body through the conductive connecting members.

[0017] As a further improvement, the laminated busbar assembly includes multiple sets of conductive connecting members, and at least two electrode connection structures are provided on one or two sets of conductive connecting members. The conductive connecting member provided with at least two electrode connection structures is defined as a multi-point conductive connecting member. The electrode connection structures on the multi-point conductive connecting member are spaced apart in a direction away from the laminated busbar body, and the multi-point conductive connecting member is split and detachably connected between at least one pair of adjacent two electrode connection structures.

[0018] As a further improvement, the multi-point conductive connecting member has an upper side edge and a lower side edge that are opposite to each other up and down, and a vertical edge connecting the upper side edge and the lower side edge. Electrode connection structures are correspondingly provided on the upper side edge and the lower side edge.

[0019] As a further improvement, the multi-point conductive connecting member is assembled by two L-shaped members. A set of folded edges of the two L-shaped members are arranged opposite to each other up and down to form the upper side edge and the lower side edge, and the other set of folded edges at least partially overlap and cooperate with each other to form the vertical edge, and fixing holes are provided in the overlapping part. The detachable connection between the two L-shaped members is realized by passing fasteners through the fixing holes. One end of the folded edge forming the lower side edge away from the vertical edge has the busbar connection structure.

[0020] As a further improvement, the IGBT connection structure is provided in the middle of the laminated busbar body, and multiple sets of conductive connecting members are disposed on both sides of the laminated busbar body.

[0021] As a further improvement, the capacitor connection structure is two through holes penetrating the laminated busbar body. A connection hole matching the corresponding through hole is provided at one end of the conductive connecting member that cooperates with the laminated busbar body, so that the capacitor connection structure can be used to connect the conductive connecting member.

[0022] As a further improvement, the IGBT connection structure of the laminated busbar body is arranged in the middle of the laminated busbar body and is arranged in two rows at intervals, so as to form a radiator installation area for installing the radiator between the two rows of IGBTs after the IGBTs are installed.

[0023] As a further improvement, when in use, the power module is installed in a box body, the box body has a box body width corresponding to the width of the carrier vehicle, the plurality of capacitors are arranged in three columns along the width direction of the box body, and a bypass switch is arranged on the outer side of the shell along the width direction of the box body.

[0024] As a further improvement, the laminated busbar assembly includes multiple groups of conductive connectors, and at least two electrode connection structures are provided on one or two groups of conductive connectors. The conductive connector provided with at least two electrode connection structures is defined as a multi-point conductive connector. The multi-point conductive connector has an upper side edge and a lower side edge that are opposite to each other up and down, and a vertical edge connecting the upper side edge and the lower side edge. Electrode connection structures are arranged correspondingly up and down on the upper side edge and the lower side edge. A fixing structure is arranged on the shell for fixing the capacitor connected to the electrode connection structure on the upper side edge.

[0025] The beneficial effects are as follows: The power module provided by the present utility model has improved the busbar structure for connecting each capacitor compared with the power module in the prior art. Since the laminated busbar assembly includes a laminated busbar main body and a conductive connecting member, a capacitor connection structure for connecting the capacitors that can be covered by the laminated busbar main body is provided on the laminated busbar main body. As a satellite-type conductive connecting member, the conductive connecting member can connect the capacitors that cannot be covered by the laminated busbar main body. Thus, when producing a series of power modules, according to the number of capacitors in the power module, it is possible to select to use the laminated busbar main body in combination with the corresponding number of satellite-type conductive connecting members to achieve the conductive connection of all capacitors with the laminated busbar main body. Through such a combination of the laminated busbar main body and the conductive connecting member group, the size of the laminated busbar main body can be made relatively small, and any conductive connecting member that can be applied thereto can be used for the conductive connecting member. It is possible to conductively connect the satellite capacitors (capacitors that cannot be covered by the laminated busbar main body) with the laminated busbar main body without increasing the specifications of the laminated busbar, realizing an increase in the number and capacity of the arranged capacitors. The conductive connecting member replaces the conventional way of increasing the area of the laminated busbar to achieve an increase in the number and capacity of capacitors. It not only reduces the specifications of the laminated busbar, but also the cost of increasing the number of conductive connecting members is much less than the cost of increasing the area of the laminated busbar. Different models of power modules can achieve the series design of the power module with a relatively small cost by keeping the busbar main body unchanged and increasing the number of conductive connecting members, avoiding the situation where the laminated busbar is made larger to meet the connection with multiple capacitors but there is waste of some areas of the laminated busbar when applied to power modules with a small number of capacitors, and there is no need to set series-sized laminated busbars for series models of power modules, reducing the manufacturing or procurement cost of the busbar for connecting capacitors, and thus reducing the manufacturing cost of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 6 is a schematic structural diagram of Embodiment 1 of the power module in the present utility model;

[0027] Figure 2 FIG. 10 is a schematic structural diagram of the connection between the capacitor and the laminated busbar assembly of Embodiment 1 of the power module in the present utility model;

[0028] Figure 3 FIG. 14 is a schematic structural diagram of the laminated busbar main body of Embodiment 1 of the power module in the present utility model;

[0029] Figure 4 FIG. 18 is a schematic structural diagram of the arrangement of the heat sink in the housing of Embodiment 1 of the power module in the present utility model;

[0030] Figure 5 FIG. 22 is a schematic structural diagram showing the installation position of the bypass switch of Embodiment 1 of the power module in the present utility model;

[0031] Figure 6This is a schematic diagram showing the installation position structure of the bypass switch from another perspective for Embodiment 1 of the power module in the present utility model;

[0032] Explanation of reference numerals:

[0033] 1. Housing; 2. SCE board; 3. Power supply; 4. Input and output copper bars; 5. IGBT; 6. Heat sink; 7. Capacitor; 8. Stacked busbar assembly; 9. Stacked busbar body; 10. IGBT connection structure; 11. Capacitor connection structure; 12. Single-point conductive connector; 13. Multi-point conductive connector; 14. Fixing hole; 15. Connection hole; 16. Fixed crossbeam; 17. Bypass switch. Detailed implementation manners

[0034] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0035] The power module provided by the present utility model is an improvement based on the existing power module, mainly used to solve the technical problems that when manufacturing different models of existing power modules, due to the waste of a single-size stacked busbar when used in a power module with a small number of capacitors, the corresponding power module manufacturing cost is high, or a series of different sizes of stacked busbars need to be set for corresponding series of power modules, resulting in high manufacturing costs of power modules.

[0036] The solution and principle of the power module of the present utility model are: the busbar structure for electrically connecting each capacitor together adopts the form of a stacked busbar assembly. The stacked busbar assembly includes a stacked busbar body and a group of conductive connectors arranged in groups. In this way, when assembling power modules of different series, according to the number of capacitors configured in the power module, select the stacked busbar body to cooperate with an appropriate number of conductive connectors to complete the electrical connection of the capacitors, avoiding waste of a single large-size stacked busbar in different models of power modules, and there is no need to configure a series of different sizes of stacked busbars, reducing the manufacturing cost of series power modules.

[0037] Embodiment 1 of the power module of the present utility model:

[0038] As Figure 1 shown, the power module includes a housing 1, and an SCE board 2, a power supply 3, input and output copper bars 4, an IGBT 5, a heat sink 6, and capacitors 7 are installed in the housing 1 through corresponding installation structures. Each capacitor 7 is electrically connected through a stacked busbar assembly 8 and is electrically connected to the IGBT 5 through the stacked busbar assembly 8.

[0039] The structure of the stacked busbar assembly 8 is as Figure 2 shown, including a stacked busbar body 9 and two conductive connectors arranged in a group. The structure of the stacked busbar body 9 is as Figure 3As shown in the figure, an IGBT connection structure 10 for connecting to the IGBT 5 is provided thereon, and each IGBT connection structure 10 includes a positive terminal and a negative terminal. In this embodiment, there are four IGBT connection structures 10, and the four IGBT connection structures 10 are arranged in two rows at intervals in the middle of the laminated busbar body 9. Thus, after the IGBT 5 is electrically connected to the laminated busbar body 9, the four IGBTs 5 are arranged in two rows, so as to form a radiator installation area for accommodating the radiator 6 between the two rows of IGBTs 5. The four IGBTs 5 are attached to both sides of the radiator 6, realizing the utilization of both sides of the radiator 6, and being able to reduce the size of the radiator 6 (the size here refers to the size in the arrangement direction of the two IGBT connection structures 10 in each row), reducing the volume of the radiator 6 by 40%, thus reducing the manufacturing cost of the power module. At the same time, the radiator 6 is arranged in the middle of the power module to the maximum extent in the arrangement direction between rows, as Figure 4 shown, leaving space for arranging the power supply 3 and other boards on both sides.

[0040] Of course, in other embodiments, the number of IGBT connection structures can be set according to the actual design, and can be more than four or less than four. For the arrangement of the IGBT connection structures, in other embodiments, they can also be arranged in a row. At this time, the size of the radiator in the corresponding arrangement direction increases correspondingly to cooperate with the IGBTs arranged in a row. Of course, multiple IGBT connection structures can also be arranged in more than three rows. At this time, radiators are arranged between adjacent two rows of IGBTs.

[0041] In this embodiment, the power module is provided with fourteen capacitors 7, among which twelve capacitors 7 are arranged in four rows and three columns. The laminated busbar body 9 has a rectangular upper surface, and its size is such that it covers two rows of a total of six capacitors 7. Correspondingly, six capacitor connection structures 11 are provided on the laminated busbar body 9, enabling the laminated busbar body 9 to be electrically connected to the six capacitors 7 it covers through the capacitor connection structures 11. Such a structure enables the laminated busbar body 9 to have two opposite edges, and the IGBT connection structures are arranged in the middle between the two edges. Six groups of conductive connectors cooperate with the two edges of the laminated busbar body 9, facilitating the overall symmetrical arrangement of the capacitor bank. Of course, in other embodiments, the conductive connectors can be concentrated and connected to one side edge of the laminated busbar body.

[0042] In this embodiment, the laminated busbar body 9 covers the middle two rows of capacitors 7. In other embodiments, the laminated busbar body may also cover the two rows at the edges, and of course, it may also cover three rows. Correspondingly, the number of capacitor connection structures on the laminated busbar body needs to be increased. As those skilled in the art can understand, based on the technical concept of the present invention, the laminated busbar body may also cover the capacitors in some columns. Regarding the basic structure of the laminated busbar body 9, it is the same as the laminated busbar in the prior art. Similarly, the IGBT connection structure and the capacitor connection structure thereon are the same as those in the prior art.

[0043] The capacitor connection structure 11 includes a positive terminal corresponding to and connected to the positive electrode of the capacitor and a negative terminal corresponding to and connected to the negative electrode of the capacitor. As Figure 3 shown, in this embodiment, the capacitor connection structure is two through holes penetrating the laminated busbar body 9. One through hole is opened on the positive busbar plate, and the other through hole is opened on the negative busbar plate. In other embodiments, the capacitor connection structure may be any structure in the prior art that can achieve conductive connection with the capacitor.

[0044] For the other eight capacitors 7, they are connected to the laminated busbar body 9 through six sets of conductive connectors. Each set of conductive connectors includes two conductive connectors. Among them, four sets of conductive connectors are each connected to one capacitor 7 in a one-to-one correspondence. The conductive connectors of this structure are defined as single-point conductive connectors 12. Two sets of conductive connectors connect two capacitors 7 in a one-to-two manner. The conductive connectors of this structure are defined as multi-point conductive connectors 13. Of course, in other embodiments, all the conductive connectors may be single-point conductive connectors, or they may all be multi-point conductive connectors. The number of conductive connectors can also be flexibly set, and the minimum can be one set.

[0045] As Figure 2 shown, the conductive connector is specifically a connecting copper bar, on which there is an electrode connection structure for connecting one of the electrodes of the capacitor 7. One end of the single-point conductive connector 12 is provided with an electrode connection structure, and the other end is provided with a busbar connection structure for detachably conducting connection with the capacitor connection structure on the laminated busbar body 9. In other embodiments, the conductive connector may be any conductive part applicable to this, such as a copper bar or an aluminum bar with flattened ends at both ends.

[0046] The multi-point conductive connector 13 includes two L-shaped members. One L-shaped member is provided with an electrode connection structure near the bending position on one of its folded edges, and a busbar connection structure is provided at one end of the folded edge far from the bending position to be detachably conductively connected to the capacitor connection structure on the stacked busbar body 9. The other L-shaped member is provided with an electrode connection structure on one of its folded edges. The two L-shaped members are detachably connected together through the folded edges without the electrode connection structure to form a U-shaped structure. Since the folded edge of one L-shaped member is provided with both a capacitor connection structure and is detachably conductively connected to the stacked busbar body 9, the length of this folded edge of the L-shaped member is relatively long, so that one side length of the two pairs of sides of the U-shaped member is longer than the other side. The two folded edges for connecting the two L-shaped members are overlapped, and fixing holes 14 are opened in the overlapping part. When fixing, bolts are inserted into the fixing holes 14 and matched with nuts to realize the detachable fixation of the two L-shaped members. As for the overlapping amount of the folded edges of the two L-shaped members, it can be full overlap or partial overlap. In other embodiments, the detachable connection structure between the split parts of the multi-point conductive connector can also adopt a hoop clamping connection, or a jack can be provided on one split part, a plug can be provided on the other, and a setscrew can be provided on the hole wall of the jack for plugging and locking connection.

[0047] By setting like this, the multi-point conductive connector 13 is split and detachably connected between the two electrode connection structures. In this way, the multi-point conductive connector 13 can be used to connect two capacitors 7 or can also be used to connect one capacitor 7, improving the flexibility of the use of the conductive connector and reducing the number of conductive connectors provided. Moreover, one of the two folded edges provided with the electrode connection structure forms the upper side edge of the multi-point conductive connector 13, and the other forms the lower side edge of the multi-point conductive connector 13, so that the electrode connection structure on the upper side edge is located upward and away from the stacked busbar body 9, which is convenient for arranging more capacitors 7, and the capacitors 7 are stacked up and down, and the upper side space in the housing 1 can be utilized, making the structure of the power module more compact. At the same time, the two overlapped folded edges form a vertical edge connecting between the upper side edge and the lower side edge of the multi-point conductive connector 13, and the detachable connection structure is arranged on the vertical edge, which is convenient for disassembly and assembly operations.

[0048] In other embodiments, for the above U-shaped multi-point conductive connector, the split position can also be on the upper side or the lower side. There can be more than two electrode connection structures on each side, and the positions and quantities of the split and detachable connection structures can be set flexibly. Of course, in other embodiments, the multi-point conductive connector can also be strip-shaped, and each electrode connection structure is arranged at intervals along the length direction of the conductive connector. The number of electrode connection structures can be greater than two. The strip-shaped multi-point conductive connector is split and provided with a detachable connection structure between any two adjacent or between each adjacent two electrode connection structures. When in use, the length of the strip-shaped multi-point conductive connector extends along the direction away from the laminated busbar body. In this embodiment, the electrode connection structure is a hole structure, and the conductive connector is connected to the capacitor by inserting a screw into the electrode connection structure and screwing it into the threaded hole on the capacitor electrode. In other embodiments, the electrode connection structure can be any structure on the conductive connector that can conductively connect with the electrode on the capacitor, such as opening a horizontal through hole on the electrode, setting a setscrew on the hole wall, and after the conductive connector is inserted into the through hole, it is fixed tightly by the setscrew. The conductive connector and the electrode can also be non-detachable connections.

[0049] In this embodiment, a connection hole 15 is opened on the conductive connector for detachable conductive connection with the laminated busbar body 9. In this way, during assembly, the connection hole 15 can be aligned with the through hole on the laminated busbar body 9, a screw is inserted into the connection hole 15 and the through hole, and is screwed into the threaded hole on the electrode of the capacitor 7, synchronously realizing the conductive connection between the laminated busbar body 9, the capacitor 7 and the conductive connector.

[0050] Since two capacitors 7 are connected to the electrode connection structures on the upper side edges of the two multi-point conductive connectors 13 to achieve a two-layer arrangement of the overall capacitor bank, and the upper capacitor 7 is arranged upside down, a fixing structure is provided on the housing 1 to specifically fix these two capacitors 7 from the upper end. In this embodiment, as Figure 1 shown, the fixing structure is a fixing cross beam 16 provided on the housing 1. The fixing cross beam 16 is provided with a hole penetrating up and down. Fixing columns are provided on the corresponding end faces of the capacitor 7. The fixing columns are inserted into the hole penetrating up and down to position the capacitor 7 in the upward and horizontal directions through the fixing cross beam 16. The lower capacitor 7 is fixed on the base of the housing 1. In other embodiments, the fixing structure can also be in other forms, such as providing a hoop on the housing, and the hoop is used to tightly hold and fix the capacitor.

[0051] In this embodiment, the twelve lower capacitors 7 are arranged in a four-row and three-column manner. When this power module is in use, it is installed in a box body. The box body can be a container. The box body has a box body length corresponding to the vehicle length and a box body width corresponding to the vehicle width during transportation. The rows are arranged along the box body length direction, and the columns are arranged along the box body width direction. In this way, the width value of the box body for installing this power module will not be too large, which is convenient for transportation. At the same time, the capacitors are arranged in three columns, as Figure 5and Figure 6 As shown in Figure 6 , a space for arranging a bypass switch 17 is left on one side of the housing 1 in the width direction of the box body, so as to install the bypass switch 17 on the housing 1. On the premise of ensuring that the size of the power module in the width direction of the box body is not too large, the power module can be controlled independently. Of course, in other embodiments, the capacitor bank can also be arranged in three rows and four columns, and the bypass switch can not be set at this time.

[0052] During assembly, fix the lower-layer capacitor 7 on the mounting holes on the base 1 of the housing 1, assemble the radiator 6 into the housing 1, assemble the IGBT 5 onto the radiator 6, install the laminated busbar body 9 on the capacitor 7, and connect the capacitors 7 not covered and connected by the laminated busbar body 9 to the laminated busbar body through conductive connectors. Install the SCE board 2 and the power supply 3 onto the module, and install the input and output copper bars 4 and the bypass switch 17.

[0053] Based on the setting of the laminated busbar assembly in the present utility model, when producing a power module with fourteen capacitors 7, it can be assembled according to the Figure 1 structure shown. When producing a power module of the model with thirteen capacitors, only one capacitor can be installed on the upper layer, and only one electrode connection structure can be left for the corresponding multi-point conductive connectors, and other split parts are not installed. When producing a power module of the model with twelve capacitors, only the lower-layer capacitors can be set, and only one electrode connection structure can be left for the corresponding two multi-point conductive connectors, and other split parts are not installed. When producing a power module of the model with ten capacitors, the capacitor bank can be connected by the laminated busbar body in combination with four groups of single-point conductive connectors.

[0054] In the second embodiment of the power module in the present utility model, in this embodiment, no fixing structure is provided on the housing, and by improving the structural strength of the multi-point conductive connectors, the reliable installation of the upper-layer capacitors in the housing is realized.

[0055] Embodiment of the laminated busbar assembly in the present utility model: The embodiment of the laminated busbar assembly is the laminated busbar assembly described in any one of the first and second embodiments of the above-mentioned power module, and will not be specifically described here.

[0056] Finally, it should be noted that the above-mentioned are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A laminated busbar assembly, characterized in that: The invention comprises a laminated busbar body and at least one group of conductive connectors, wherein the laminated busbar body has an IGBT connection structure for conductively connecting an IGBT and a capacitor connection structure for conductively connecting a capacitor that can be covered by the laminated busbar body, and each group of conductive connectors comprises two conductive connectors, wherein one end of the conductive connector has an electrode connection structure for connecting one of the electrodes of a capacitor that the laminated busbar body cannot directly connect to through its capacitor connection structure, and the other end has a busbar connection structure for detachably conductively connecting to the capacitor connection structure of the laminated busbar body, so that the laminated busbar body can be connected to the capacitor that cannot be covered by the laminated busbar body through the conductive connector.

2. The laminated busbar assembly according to claim 1, characterized in that: The laminated busbar assembly includes multiple groups of conductive connectors, and one or two groups of conductive connectors are provided with at least two electrode connection structures. The conductive connectors provided with at least two electrode connection structures are defined as multi-point conductive connectors. The electrode connection structures on the multi-point conductive connectors are arranged at intervals in a direction away from the laminated busbar body, and the multi-point conductive connectors are separated and detachably connected between at least one pair of adjacent electrode connection structures.

3. The laminated busbar assembly according to claim 2, characterized in that: The multi-point conductive connecting member has an upper side edge and a lower side edge which are opposite to each other, and a vertical edge connected between the upper side edge and the lower side edge. The upper side edge and the lower side edge are correspondingly provided with electrode connection structures.

4. The laminated busbar assembly according to claim 3, characterized in that: The multi-point conductive connector is composed of two L-shaped components. A group of folded edges of the two L-shaped components are arranged opposite to each other up and down to form the upper side and the lower side. Another group of folded edges at least partially overlap up and down to form the vertical side, and a fixing hole is opened on the overlapping part. A detachable connection between the two L-shaped components is achieved by inserting a fastener in the fixing hole. The end of the folded edge constituting the lower side away from the vertical side has the busbar connection structure.

5. The laminated busbar assembly according to any one of claims 1 to 4, characterized in that: The IGBT connection structure is arranged in the middle of the laminated busbar body, and a plurality of groups of conductive connecting members are arranged on both sides of the laminated busbar body.

6. The laminated busbar assembly according to any one of claims 1 to 4, characterized in that: The capacitor connection structure is two through holes that penetrate the laminated busbar body. A connection hole that matches the corresponding through hole is opened on one end of the conductive connector that matches the laminated busbar body, so that the capacitor connection structure can be used to connect the conductive connector.

7. The laminated busbar assembly according to any one of claims 1 to 4, characterized in that: The IGBT connection structure of the laminated busbar body is arranged in the middle of the laminated busbar body and is arranged in two rows at intervals, so that a heat sink installation area for installing a heat sink is formed between the two rows of IGBTs after the IGBTs are installed.

8. A power module, comprising a housing and a plurality of capacitors arranged in the housing, characterized in that: The multiple capacitors are conductively connected via a laminated busbar assembly, and the laminated busbar assembly is the laminated busbar assembly according to any one of claims 1-7.

9. The power module according to claim 8, characterized in that: The power module is installed in a box body when in use. The box body has a box body width corresponding to the width of the transport vehicle. The multiple capacitors are arranged in three rows along the box body width direction. A bypass switch is provided on the outer side of the shell along the box body width direction.

10. The power module according to claim 8 or 9, characterized in that: The laminated busbar assembly includes multiple groups of conductive connectors, and one or two groups of conductive connectors are provided with at least two electrode connection structures. The conductive connectors provided with at least two electrode connection structures are defined as multi-point conductive connectors. The multi-point conductive connectors have upper and lower sides opposite to each other, and vertical sides connected between the upper and lower sides. The upper and lower sides are provided with electrode connection structures correspondingly from top to bottom. The shell is provided with a fixing structure for fixing the capacitor connected to the electrode connection structure on the upper side.

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