Energy storage converter

Abstract

The utility model provides an energy storage converter, which comprises a heat dissipation module, a power conversion module, a capacitor module and a control module, the capacitor module is electrically connected with the power conversion module, the power conversion module is electrically connected with the control module, and the power conversion module comprises a metal oxide semiconductor (MOS) tube; the heat dissipation module comprises a metal heat dissipation piece, an insulation connecting part and an insulation heat conduction piece, the metal heat dissipation piece and the power conversion module are connected through the insulation connecting part, and the insulation heat conduction piece is located between the metal heat dissipation piece and the power conversion module and is adjacent to the MOS tube. Therefore, under the condition of ensuring that the power conversion module comprising the MOS tube has a good heat dissipation effect and meets the safety requirement, the power conversion module can replace a power conversion module of an IGBT tube, the manufacturing cost of the energy storage converter is reduced, and the cost performance of the energy storage converter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage, in particular to an energy storage converter. Background Art

[0002] The role of the energy storage inverter in the energy storage system is to convert the AC power on the grid side into DC power and transmit it to the battery charging power when the battery is charging, and to convert the DC power of the battery into AC power and transmit it to the grid power through grid-connected technology when the battery is discharging. It is the carrier or medium for power conversion between the grid and the battery.

[0003] Among them, energy storage systems can be divided into low-voltage energy storage systems and high-voltage energy storage systems according to voltage levels. The topology of high-voltage energy storage systems generally adopts cascaded multi-level energy storage converters, and low-voltage energy storage is often implemented using a three-level topology architecture. The above energy storage converters usually use IGBT tubes (Insulate-Gate Bipolar Transistor) as the main power conversion device, but the price of IGBT tubes is expensive, which makes the cost of energy storage converters high and the cost performance is low. Utility Model Content

[0004] In view of this, the utility model provides an energy storage inverter, which can replace the power conversion module of the IGBT tube while ensuring that the power conversion module including the MOS tube has a good heat dissipation effect and meets the safety requirements, thereby reducing the manufacturing cost of the energy storage inverter and improving the cost performance of the energy storage inverter.

[0005] In a first aspect of the utility model, an energy storage converter is provided, comprising: a heat dissipation module, a power conversion module, a capacitor module, and a control module, wherein the capacitor module is electrically connected to the power conversion module, the power conversion module is electrically connected to the control module, and the power conversion module comprises a MOS tube; the heat dissipation module comprises a metal heat sink, an insulating connection portion, and an insulating heat conductive member, the metal heat sink and the power conversion module are connected via the insulating connection portion, the insulating heat conductive member is located between the metal heat sink and the power conversion module, and is adjacent to the MOS tube.

[0006] Furthermore, the power conversion module includes a power substrate and an electrode, the power substrate is connected to the insulating connecting part, and the electrode and the MOS tube are arranged on the power substrate; wherein the power MOS tube and part of the electrode are located within the projection area of ​​the insulating thermal conductor on the power substrate, and are located on the side of the power substrate facing the insulating thermal conductor.

[0007] Furthermore, the power conversion module also includes a first fixing member, and the first fixing member and the insulating thermal conductive member are distributed on both sides of the power substrate. The first fixing member is connected to the metal heat sink to adjust the distance between the power substrate and the metal heat sink so that the MOS and part of the electrode fit with the insulating thermal conductive member; wherein the first fixing member is a pressure strip, and the pressure strip is distributed in the middle of the power substrate, and the number of the pressure strip is at least one.

[0008] Furthermore, the power conversion module further includes a second fixing member connected to the end of the power substrate, and the second fixing member is configured to limit deformation of the end of the power substrate.

[0009] Furthermore, there are multiple insulating connection parts, which are spaced apart to form an installation space, and the insulating thermally conductive part is arranged as an insulating thermally conductive film, which abuts against the insulating connection part and is confined within the installation space; the power conversion module also includes a first connecting part, which is connected to the insulating connection part to connect the first fixing part, the power substrate, and the metal heat sink, and the first connecting part is connected to the insulating connection part and is also configured to adjust the pressing state of the insulating thermally conductive film and the metal heat sink.

[0010] Furthermore, the power conversion module also includes a first conductive connection part and a second conductive connection part connected to the power substrate, the first conductive connection part and the second conductive connection part correspond to the electrode and are electrically connected; the capacitor module includes a capacitor plate, a first metal connector and a second metal connector, the capacitor plate and the insulating thermal conductor are distributed on both sides of the power substrate, the first metal connector is connected to the first conductive connection part to connect the power substrate and the capacitor plate, and the second metal connector is connected to the second conductive connection part to connect the power substrate and the capacitor plate.

[0011] Furthermore, the energy storage converter also includes: an insulating support shell, the insulating support shell is located on the side of the capacitor plate away from the power substrate; the control module includes a control board, the control board is mounted on the insulating support shell and is located on the side of the support shell away from the capacitor plate; the power module also includes a drive board connected to the power substrate and electrically connected to the power substrate, the drive board and the control board are electrically connected through a plug-in structure, and the plug-in structure is passed through the capacitor plate and the support shell; wherein the plug-in structure includes a matching plug-in portion and a socket portion, one of the plug-in portion and the socket portion is arranged on the drive board, and the other is arranged on the control board.

[0012] Furthermore, the energy storage inverter also includes: a third metal connector, which is connected to the second metal connector to connect the insulating support shell and the capacitor plate; an insulating film, which is installed on the insulating support shell and is located on the side of the insulating support shell facing the control board, and the insulating film is used to electrically isolate the third metal connector from the control board; wherein the insulating film is also provided with an avoidance hole for avoiding the plug-in structure.

[0013] Furthermore, the end of the first conductive connection part away from the power substrate is set as an internal thread structure; the end of the second conductive connection part away from the power substrate is set as an internal thread structure; the first metal connecting part is a screw; the end of the second metal connecting part connected to the first conductive connection part is set as an external thread structure, and the end connected to the third metal connecting part is set as an internal thread structure; the third metal connecting part is a screw.

[0014] Furthermore, the metal heat sink includes a first part and a second part that are connected to each other, the first part is connected to the power substrate, the first part is configured as a plate-like structure and is arranged opposite to the insulating heat conductive member, the second part is located on a side of the first part away from the insulating heat conductive member, and an installation portion is arranged on the second part.

[0015] The energy storage converter provided by the embodiment of the utility model includes a heat dissipation module, a power conversion module, a capacitor module and a control module, wherein the power conversion module is configured to include a MOS tube, which can reduce the manufacturing cost while ensuring that the power conversion module has good quality and high charging efficiency, and has a high cost performance ratio. By arranging the insulating heat conductive member between the metal heat dissipation member and the power conversion module, and adjacent to the MOS tube, the insulating heat conductive member is used to transfer the heat of the power conversion module to the metal heat dissipation member to cool and dissipate the power conversion module, which can ensure a good heat dissipation effect of the power conversion module, and the heat dissipation cost is low. At the same time, the metal heat dissipation member and the power conversion module are connected through an insulating connection part, and the insulating heat insulating member is located between the metal heat dissipation member and the power conversion module, which can ensure that the power conversion module and the metal heat dissipation member meet the electrical connection safety specifications. Therefore, while ensuring that the power conversion module including the MOS tube has a good heat dissipation effect and meets the safety requirements, the power conversion module of the IGBT tube can be replaced, the manufacturing cost of the energy storage converter is reduced, the cost performance of the energy storage converter is improved, and it is suitable for promotion and application.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0018] Figure 1 A schematic diagram of the structure of an energy storage converter provided by an embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 an exploded view of the illustrated embodiment;

[0020] Figure 3 An exploded view of a heat dissipation module provided by an embodiment of the utility model is shown;

[0021] Figure 4 An exploded view of a power conversion module and a capacitor plate provided by an embodiment of the utility model is shown from one perspective.

[0022] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0023] 100 energy storage converter, 110 heat dissipation module, 111 metal heat dissipation member, 1111 first part, 1112 second part, 1113 installation part, 112 insulating connection part, 113 insulating heat conductive member, 120 power conversion module, 121 power substrate, 122 electrodes, 122a electrode a, 122b electrode b, 122c electrode c, 122d electrode d, 122e electrode e, 122f electrode f, 123 first fixing member, 124 a second fixing member, 125 a first conductive connecting portion, 126 a second conductive connecting portion, 127 a driving board, 128 a plug-in portion, 129 a first connecting member, 130 a capacitor module, 131 a capacitor plate, 132 a first metal connecting member, 133 a second metal connecting member, 140 a control module, 141 a control board, 142 a socket portion, 143 a connecting terminal a, 144 a connecting terminal b, 150 an insulating support shell, 160 an insulating film, 170 a third metal connecting member. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] Refer to the following Figures 1 to 4 An energy storage converter 100 according to some embodiments of the present invention is described.

[0026] like Figure 1 and Figure 3As shown, the energy storage converter 100 includes: a heat dissipation module 110, a power conversion module 120, a capacitor module 130, and a control module 140. The capacitor module 130 is electrically connected to the power conversion module 120, and the power conversion module 120 is electrically connected to the control module 140. The power conversion module 120 includes a MOS tube; the heat dissipation module 110 includes a metal heat sink 111, an insulating connection portion 112, and an insulating heat conductive member 113. The metal heat sink 111 and the power conversion module 120 are connected through the insulating connection portion 112. The insulating heat conductive member 113 is located between the metal heat sink 111 and the power conversion module 120 and is adjacent to the MOS tube.

[0027] Among them, the power conversion module 120 is used for conversion between direct current and alternating current, the capacitor module 130 is used for storing electric energy, the capacitor module 130 is electrically connected to the power conversion module 120, and the power conversion module 120 is electrically connected to the control module 140. It can be understood that the control module 140 can communicate with the battery to obtain the battery status information, and then can realize the protective charging and discharging of the battery to ensure the safe operation of the battery. Specifically, the energy storage inverter 100 can control the charging and discharging process of the battery, perform AC-DC conversion, and can directly supply power to the AC load without a power grid.

[0028] The energy storage converter 100 provided by the utility model, the power conversion module 120 includes a MOS tube (Metal Oxide Semiconductor). Since the charging and discharging efficiency of the power conversion module 120 is proportional to the number of power MOS tubes used, when the number of power MOS tubes connected in parallel reaches a certain number, the charging and discharging efficiency of the energy storage converter 100 using the power MOS tube will reach or exceed the charging and discharging efficiency of the energy storage converter 100 using the IGBT tube, meeting the design requirements of the energy storage converter 100. At the same time, since the price of the MOS tube is lower than that of the IGBT tube, and the quality of the MOS tube is higher than that of the IGBT tube, the cost performance of the MOS tube is higher than that of the IGBT tube. Therefore, the energy storage converter 100 including the MOS tube provided by the utility model has low cost, high cost performance, and is suitable for popularization and application.

[0029] At the same time, if Figure 3As shown, the energy storage converter 100 provided by the embodiment of the utility model further includes a heat dissipation module 110, and the heat dissipation module 110 includes a metal heat sink 111, an insulating connection portion 112, and an insulating heat conductive member 113, wherein the metal heat sink 111 has a good heat dissipation effect and is a metal member, and the insulating heat conductive member 113 has good thermal conductivity, and the insulating heat conductive member 113 is located between the metal heat sink 111 and the power conversion module 120, and is adjacent to the MOS tube, so that the heat of the power conversion module 120 can be transferred to the metal heat sink 111 for heat dissipation by using the insulating heat conductive member 113, so as to reduce the temperature of the power conversion module 120 and improve the reliability of the power conversion module 120. It can be understood that the metal heat sink 111 has a low cost and a high heat dissipation efficiency. Compared with the use of a fan for heat dissipation in the related art, it has a low cost and a high cost performance. Among them, the insulating connection part 112 and the insulating heat conductive part 113 both have good insulation properties and can isolate the charged body. Therefore, the metal heat sink 111 and the power conversion module 120 are connected through the insulating connection part 112, and the insulating heat insulating part is located between the metal heat sink 111 and the power conversion module 120, which can ensure that the power conversion module 120 and the metal heat sink 111 meet the electrical connection safety specifications. In other words, the setting of the insulating connection part 112 and the insulating heat conductive part 113 ensures that the metal heat sink 111 has a good heat dissipation effect on the power conversion module 120, and at the same time, the power conversion module 120 and the metal heat sink 111 meet the safety requirements.

[0030] Therefore, in the energy storage converter 100 provided by the embodiment of the utility model, the power conversion module 120 is configured to include a MOS tube, which can reduce the manufacturing cost while ensuring that the power conversion module 120 has good quality and high charging and discharging efficiency, and has a high cost performance ratio. By arranging the insulating heat conductive member 113 between the metal heat sink 111 and the power conversion module 120, and adjacent to the MOS tube, the insulating heat conductive member 113 is used to transfer the heat of the power conversion module 120 to the metal heat sink 111 to cool and dissipate the heat of the power conversion module 120, which can ensure a good heat dissipation effect of the power conversion module 120, and the heat dissipation cost is low. At the same time, the metal heat sink 111 and the power conversion module 120 are connected through the insulating connecting part 112, and the insulating heat insulating member is located between the metal heat sink 111 and the power conversion module 120, which can ensure that the power conversion module 120 and the metal heat sink 111 meet the electrical connection safety specifications. Therefore, while ensuring that the power conversion module 120 including the MOS tube has a good heat dissipation effect and meets safety requirements, the power conversion module 120 of the IGBT tube can be replaced, reducing the manufacturing cost of the energy storage inverter 100, improving the cost performance of the energy storage inverter 100, and being suitable for promotion and application.

[0031] The metal heat sink 111 may be made of metal aluminum, metal copper, etc., and the insulating heat conductive member 113 may be made of silicone material, ceramic material, plastic material, etc. Specifically, the insulating heat conductive member 113 may be a polyimide film thermally conductive insulating film 160, etc. The insulating connecting portion 112 may be an insulating column made of plastic material.

[0032] like Figure 2 and Figure 4 As shown, in some possible embodiments provided by the present invention, the power conversion module 120 includes a power substrate 121 and an electrode 122 , the power substrate 121 is connected to the insulating connecting portion 112 , and the electrode 122 and the MOS tube are arranged on the power substrate 121 .

[0033] Among them, there are multiple MOS tubes and they are connected in parallel. Since the charging and discharging efficiency of the energy storage converter 100 is proportional to the number of MOS tubes used, when the number of MOS tubes connected in parallel reaches a certain number, the energy storage converter 100 will have a higher efficiency, so that the efficiency of the energy storage converter 100 including the MOS tube will exceed the efficiency of the energy storage converter 100 using the IGBT tube, so that the energy storage converter 100 has sufficient charging and discharging efficiency, reduces the manufacturing cost, and can improve the cost performance of the energy storage converter 100.

[0034] The MOS tube and part of the electrode 122 are located in the projection area of ​​the insulating heat conductive member 113 on the power substrate 121, and are located on the side of the power substrate 121 facing the insulating heat conductive member 113. That is to say, the MOS tube and part of the electrode 122 of the power conversion module 120 are opposite to the insulating heat conductive member 113, and the insulating heat conductive member 113 can cover the MOS tube and part of the electrode 122, thereby enabling the MOS tube and part of the electrode 122 to quickly and directly transfer heat to the insulating heat conductive member 113, and then transfer heat to the metal heat sink 111 through the insulating heat conductive member 113 for heat dissipation, so as to ensure that the power conversion module 120 has a good heat dissipation effect and a high heat dissipation efficiency, and improve the reliability of the energy storage converter 100.

[0035] like Figure 2 and Figure 4As shown, in some possible embodiments provided by the present invention, the power conversion module 120 also includes a first fixing member 123, and the first fixing member 123 and the insulating heat-conducting member 113 are distributed on both sides of the power substrate 121. The first fixing member 123 is connected to the metal heat sink 111 to adjust the distance between the power substrate 121 and the metal heat sink 111 so that the MOS tube and part of the electrode 122 are in contact with the insulating heat-conducting member 113, that is, the setting of the first fixing member 123 can reduce the distance between the power substrate 121 and the metal heat sink 111, thereby making the MOS tube and part of the electrode 122 in contact with the insulating heat-conducting member 113, so that the heat of the MOS tube and part of the electrode 122 can be quickly and directly transferred to the metal heat sink 111 through the insulating heat-conducting member 113, thereby improving the heat dissipation efficiency.

[0036] Among them, the partial electrode 122 can be a part of one electrode 122, or a part of an electrode 122 among multiple electrodes 122. It can be understood that when the partial electrode 122 is a part of one electrode 122, the heat of the other part of the electrode 122 will be transferred to the partial electrode 122 in contact with the insulating heat conductive member 113, and the heat of other electrodes 122 will be transferred to this electrode 122 through the power substrate 121, thereby, the partial electrode 122 in contact with the insulating heat conductive member 113 can realize the heat of the electrode 122 and other electrodes 122 transferred to the metal heat sink 111 through the insulating heat conductive member 113. When the partial electrode 122 is a part of the electrode 122 among multiple electrodes 122, the heat of other electrodes 122 can be transferred to the partial electrode 122 in contact with the insulating heat conductive member 113 through the power substrate 121, thereby realizing the heat of multiple electrodes 122 transferred to the metal heat sink 111 through the insulating heat conductive member 113.

[0037] Specifically, Figure 4As shown, there are multiple electrodes 122, including electrode a122a, electrode b122b, electrode c122c, electrode d122d, electrode e122e, and electrode f122f, wherein a portion of electrode c122c is connected to the power substrate 121 and is located on a side of the power substrate 121 close to the insulating heat conductive member 113. When the first fixing member 123 is assembled, the portion of battery c connected to the power substrate 121 can be attached to the insulating heat conductive member 113 to achieve direct heat transfer, and the heat of electrode a122a, electrode b122b, and electrode d122d can be transferred to electrode a122a through the power substrate 121, and directly transferred to the metal heat sink 111 through the insulating heat conductive member 113 for heat dissipation. Similarly, a portion of the electrode f122f is connected to the power substrate 121 and is located on a side of the power substrate 121 close to the insulating heat conductive member 113. When the first fixing member 123 is assembled, the portion of the electrode f122f connected to the power substrate 121 can be fitted with the insulating heat conductive member 113 to achieve direct heat transfer, and the heat of the electrode e122e can be transferred to the electrode f122f through the power substrate 121, and directly transferred to the metal heat sink 111 through the insulating heat conductive member 113 for heat dissipation via the electrode f122f. It is understandable that a portion of the electrode a122a, electrode b122b, electrode d122d, and electrode e122e may also be fitted with the insulating heat conductive member 113, or may not be fitted. The electrode 122 may also include others, which are not listed in the utility model.

[0038] Among them, Figure 2 and Figure 4 As shown, the first fixing member 123 can be a pressure strip, which is distributed in the middle part of the power substrate 121. The setting of the pressure strip can make the middle part of the power substrate 121 move toward the direction close to the metal heat sink 111, so that the middle part of the power substrate 121 and the MOS tube distributed in the middle part of the power substrate 121 are close to the insulating heat conductor 113, ensuring that the heat in the middle part of the power conversion module 120 can be well released to the metal heat sink 111 through the insulating heat conductor 113. At the same time, the pressure strip can increase the contact area between the pressure strip and the power substrate 121. In this way, when the pressure strip is connected to the metal heat sink 111, the pressure strip can prevent the middle part of the power substrate 121 from deformation, thereby playing a good anti-deformation role.

[0039] The number of the pressure strips may be one, two, three, or other numbers. Thus, the number of pressure strips may be reasonably set according to the length and setting position of the pressure strips.

[0040] Specifically, Figure 2As shown, there are four pressure strips, which are spaced apart in the middle of the power substrate 121 to ensure that the middle of the power conversion module 120 can reliably contact the insulating thermal conductive film and prevent the middle of the power substrate 121 from being deformed.

[0041] like Figure 2 and Figure 4 As shown, in some possible embodiments provided by the present invention, the power conversion module 120 also includes a second fixing member 124 connected to the end of the power substrate 121, and the second fixing member 124 is configured to limit the deformation of the end of the power substrate 121, that is, the second fixing member 124 can prevent the end of the power substrate 121 from deforming. Therefore, through the cooperation between the pressure strip and the second fixing member 124, the entire power substrate 121 can be better prevented from deformation.

[0042] Specifically, the number of the second fixing members 124 can be one, two, three, four or more. Figure 4 As shown, there are two second fixing members 124, which are distributed at the left and right ends of the power substrate 121. The second fixing members 124 may be pressing sheets, which are fixed to the two sides of the power substrate 121 by screws and bolts.

[0043] In some possible embodiments provided by the present invention, there are multiple insulating connecting parts 112, and multiple insulating connecting parts 112 connect the power substrate 121 and the metal heat sink 111, which can improve the reliability and stability of the connection between the power substrate 121 and the metal heat sink 111.

[0044] Among them, multiple insulating connecting parts 112 are distributed at intervals to form an installation space, the insulating thermal conductive part 113 is set as an insulating thermal conductive film, the insulating thermal conductive film abuts against the insulating connecting part 112 and is confined within the installation space, and the power conversion module 120 also includes a first connecting part 129, the first connecting part 129 is connected to the insulating connecting part 112 to connect the first fixing part 123, the power substrate 121, and the metal heat sink 111, and the first connecting part 129 is connected to the insulating connecting part 112 and is also configured to adjust the pressing state of the insulating thermal conductive film and the metal heat sink 111.

[0045] In this embodiment, the first fixing member 123 is connected to the insulating connection part 112 through the first connecting member 129. For example, the end of the insulating connection part 112 facing the power substrate 121 is provided with an internal thread, and the first connecting member 129 is a bolt. The bolt passes through the first fixing member 123 and the power substrate 121 and is connected with the internal thread of the insulating connection part 112, so that the first fixing member 123, the power substrate 121 and the metal heat sink 111 can be connected. At the same time, by adjusting the connection torque of the first connecting member 129 and the insulating connection part 112, the pressing state of the insulating heat conductive film and the metal heat sink 111 can be adjusted, and then the insulating heat conductive film and the metal heat sink 111 can be attached, so that the heat of the power conversion module 120 is directly transferred to the metal heat sink 111 through the insulating heat conductive film, further improving the heat dissipation effect and heat dissipation efficiency.

[0046] Specifically, when one side of the insulating heat conductive member 113 is in contact with the MOS tube and the electrode 122 , and the other side is in contact with the metal heat sink 111 , the heat dissipation module 110 has a higher heat dissipation efficiency and a good heat dissipation effect for the power conversion module 120 .

[0047] like Figure 2 and Figure 4 As shown, in some possible embodiments provided by the present invention, the power conversion module 120 also includes a first conductive connection part 125 and a second conductive connection part 126 connected to the power substrate 121, and the first conductive connection part 125 and the second conductive connection part 126 correspond to and are electrically connected to the electrode 122, that is, each electrode 122 corresponds to a first conductive connection part 125 and a second conductive connection part 126, and the first conductive connection part 125 and the second conductive connection part 126 are both electrically connected to the electrode 122.

[0048] The capacitor module 130 includes a capacitor plate 131, a first metal connector 132, and a second metal connector 133. The capacitor plate 131 and the insulating heat-conducting member 113 are distributed on both sides of the power substrate 121. The first metal connector 132 is connected to the first conductive connecting portion 125 to connect the power substrate 121 and the capacitor plate 131. The second metal connector 133 is connected to the second conductive connecting portion 126 to connect the power substrate 121 and the capacitor plate 131. In this way, the power substrate 121 and the capacitor plate 131 can be connected, and when working, the first conductive connecting portion 125 and the second conductive connecting portion 126 can be used as conductors to be electrically connected to both ends of the capacitor plate 131 respectively.

[0049] like Figure 2 and Figure 4As shown, in some possible embodiments provided by the present invention, the energy storage converter 100 also includes: an insulating support shell 150, the insulating support shell 150 is located on the side of the capacitor plate 131 away from the power substrate 121; the control module 140 includes a control board 141, the control board 141 is installed on the insulating support shell 150 and is located on the side of the support shell away from the capacitor plate 131; thus, the insulating support shell 150 can be used to electrically isolate the control board 141 from the capacitor plate 131, meeting the safety requirements for electrical connections.

[0050] Among them, the power conversion module 120 also includes a driving board 127 connected to the power substrate 121 and electrically connected to the power substrate 121. The driving board 127 and the control board 141 are electrically connected through a plug-in structure, and the plug-in structure is penetrated through the capacitor plate 131 and the support shell, thereby enabling the control board 141 and the driving board 127 to be electrically connected, so that the control board 141 and the power conversion module 120 can transmit signals.

[0051] That is to say, in the energy storage inverter 100 provided by the embodiment of the utility model, the heat dissipation module 110, the power conversion module 120, the capacitor module 130, the insulating support shell 150 and the control module 140 are arranged in sequence, and the drive board 127 and the control board 141 of the power conversion module 120 are electrically connected through a plug-in structure. This arrangement can achieve the design requirements of compact arrangement of each module while ensuring that the connection of each module meets the electrical connection safety requirements, heat dissipation requirements, confluence requirements, etc., and thus can meet the design requirements of a smaller volume of the energy storage inverter 100, reduce the space occupied by the energy storage inverter 100, and expand the scope of use of the energy storage inverter 100.

[0052] Among them, Figure 2 As shown, the plug-in structure includes a matching plug-in portion 128 and a socket portion 142, one of which is arranged on the driving board 127, and the other is arranged on the control board 141. By plugging the plug-in portion 128 and the socket portion 142, the driving board 127 and the control board 141 can be electrically connected. Specifically, the plug-in portion 128 can be arranged on the driving board 127, and the socket portion 142 can be arranged on the control board 141, or the socket portion 142 can be arranged on the driving board 127, and the plug-in portion 128 can be arranged on the control board 141.

[0053] It can be understood that the plug-in portion 128 may include a first shell and a first terminal, and the socket portion 142 may include a second shell and a second terminal. When the plug-in portion 128 and the socket portion 142 are plugged in, the first terminal and the second terminal are electrically connected, and the first terminal and the second terminal are located inside the space enclosed by the first shell and the second shell. The first shell and the second shell are configured as insulating parts to comply with safety requirements for electrical connections and improve the safety of the energy storage inverter 100.

[0054] Specifically, taking the example of the plug-in portion 128 being arranged on the driving board 127 and the socket portion 142 being arranged on the control board 141, the driving board 127 is welded on the power substrate 121 and electrically connected to the power substrate 121, the driving board 127 can be understood as a circuit board, the plug-in portion 128 is welded on the driving board 127, and the socket portion 142 is welded on the control board 141. When the control board 141 is installed on the insulating support shell 150, after the insulating support shell 150 is connected with the capacitor plate 131 and the power substrate 121, the plug-in portion 128 and the socket portion 142 can be connected together through the capacitor plate 131 and the insulating support shell 150, so as to realize the signal transmission between the control board 141 and the driving board 127.

[0055] Specifically, a first avoidance opening may be provided on the capacitor plate 131, and a second avoidance opening may be provided on the insulating support shell 150, so that the plug-in structure can be inserted through the first avoidance opening and the second avoidance opening. Figure 4 As shown, the capacitor plate 131 may include two identical sub-capacitor plates that are separately arranged, and a gap is set between the two sub-capacitor plates. The plug-in portion 128 and the socket portion 142 can be connected through the second avoidance opening on the insulating support shell 150 through the gap.

[0056] Furthermore, if Figure 2 As shown, the control module 140 also includes a terminal connected to the control board 141 to achieve the connection between the control board 141 and various components. Specifically, the terminal is located on the side of the control board 141 away from the capacitor plate 131, and the control module 140 includes a terminal a143 connected to the control board 141, such as the terminal a143 is welded on the control board 141, and the terminal a143 is used to connect to the battery. The control module 140 also includes a terminal b144 electrically connected to the control board 141, such as the terminal b144 is welded on the control board 141, and the terminal b144 can be electrically connected to components such as sensors and resistors. It can be understood that the terminal can also include terminals for other operations, which are not described in detail in the utility model.

[0057] like Figure 2As shown, in some possible embodiments provided by the present utility model, the energy storage converter 100 further includes: a third metal connector 170, the third metal connector is connected to the second metal connector 133 to connect the insulating support shell 150 and the capacitor plate 131, thereby, the second metal connector 133 cooperates with the second conductive connection part 126, and can connect the capacitor plate 131 and the power substrate 121, and the second metal connector 133 cooperates with the third metal connector 170, and can connect the capacitor plate 131 and the insulating support shell 150. In other words, the second metal connector 133 in this embodiment has diversified functions, which can realize the connection between the capacitor plate 131 and the power board, and can also realize the connection between the capacitor plate 131 and the insulating support shell 150, which can simplify the setting of the connecting components, and thus can meet the design requirements of the energy storage converter 100 with a compact structure and a small volume, and at the same time, it is conducive to reducing the manufacturing cost of the energy storage converter 100, and is suitable for popularization and application.

[0058] In some possible embodiments provided by the present invention, the first end of the first conductive connection part 125 is welded to the side of the power substrate 121 away from the insulating heat conductor 113, and the second end of the first conductive connection part 125 is connected to the first metal connection part 132. For example, the first conductive connection part 125 can be a metal stud, the first end of the metal stud is welded to the power substrate 121, the second end of the metal stud is set to an internal thread structure, and the first metal connection part 132 is a screw. The connection between the first metal connection part 132 and the first conductive connection part 125 can be achieved by cooperating with the screw and the internal thread structure, and then the capacitor plate 131 can be connected to the power substrate 121. At the same time, the first conductive connection part 125 and the first metal connection part 132 are both conductive, so that when working, one end of the capacitor plate 131 can be connected to the power substrate 121.

[0059] Specifically, the first end of the second conductive connection part 126 is welded to a side of the power substrate 121 away from the insulating heat-conducting member 113, and the second end of the second conductive connection part 126 is connected to the second metal connection part 133. For example, the second conductive connection part 126 can be a metal stud, the first end of the metal stud is welded to the power substrate 121, the second end of the metal bolt is set to an internal thread structure, the end of the second metal connection part 133 connected to the second conductive connection part 126 is set to an external thread structure, the end of the second metal connection part 133 connected to the third metal connection part 170 is set to an internal thread structure, and the third metal connection part 170 is a screw. In this way, the external thread structure of the second metal connection part 133 is connected to the internal thread structure of the second conductive connection part, so that the capacitor plate 131 can be connected to the power substrate 121. Since the second conductive connection part 126 and the second metal connection part 133 are both conductive, the other end of the capacitor plate 131 can be connected to the power substrate 121 during operation. At the same time, the internal thread structure of the second metal connector 133 is connected to the screw of the third metal connector 170 , so that the insulating support shell 150 and the capacitor plate 131 can be connected.

[0060] like Figure 4 As shown, in some possible embodiments provided by the present invention, the energy storage converter 100 further includes: an insulating film 160, the insulating film 160 is mounted on the insulating support shell 150, and is located on the side of the insulating support shell 150 facing the control board 141, and the insulating film 160 is used to electrically isolate the third metal connector 170 from the control board 141. Since the second metal connector 133 is connected to the first conductive connection part 125, the first conductive connection part 125, the second metal connector 133, and the third metal connector 170 are all conductive parts, and the control board 141 is provided with a control potential, which needs to be insulated from the metal parts. Therefore, by using the insulating film 160 to electrically isolate the third metal connector 170 from the control board 141, it can ensure that the electric control board meets the safety specifications for electrical connections, and improve the safety of the use of the energy storage converter 100.

[0061] The insulating film 160 is also provided with a clearance hole for escaping the plug-in structure to ensure that the driving board 127 of the power conversion module 120 can be smoothly and reliably electrically connected to the control board 141 to transmit signals. The insulating film 160 is a thin film that can ensure good electrical insulation.

[0062] In some possible embodiments provided by the present invention, the metal heat sink 111 includes a first part 1111 and a second part 1112 connected to each other, the first part 1111 is connected to the power substrate 121, the first part 1111 is set as a plate-like structure, and is arranged opposite to the insulating heat-conducting member 113, thereby increasing the relative area between the insulating heat-conducting member 113 and the first part 1111, so that the heat on the power conversion module 120 can be quickly and relatively fully transferred to the first part 1111 of the metal heat sink 111 through the insulating heat-conducting member 113, thereby improving the heat dissipation efficiency of the power conversion module 120 and ensuring a good heat dissipation effect. Among them, the first part 1111 of the metal heat sink 111 is a plate-like structure, which has a large heat dissipation area and can further improve the heat dissipation efficiency of the power conversion module 120.

[0063] The second part 1112 of the metal heat sink 111 is located on the side of the first part 1111 away from the insulating heat conductor 113, so that the second part 1112 does not affect the connection between the first part 1111 and the power substrate 121. At the same time, by providing a mounting portion 1113 on the second part 1112, the metal heat sink 111 can be fixed at the position to be installed, and then the entire energy storage converter 100 can be installed at the position to be installed. Specifically, Figure 3 As shown, the mounting portion 1113 on the metal heat sink 111 can be a mounting hole, and the metal heat sink 111 can be fixed at the position to be installed by passing a connecting structure such as a bolt through the mounting hole, which is simple to operate and convenient to process. It is understandable that the mounting portion 1113 on the metal heat sink 111 can also be a connecting ear, a hook, etc., which are not listed one by one in the utility model.

[0064] The first part 1111 and the second part 1112 of the metal heat sink 111 can be bent, such as the second part 1112 is located at the bottom of the first part 1111 and is vertically arranged with respect to the first part 1111. It is understandable that the second part 1112 can also be located at the top of the first part 1111 or at other positions.

[0065] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the terms "upper" and "lower" indicate positions or positional relationships based on the positions or positional relationships described in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy storage converter, characterized in that: include: A heat dissipation module, a power conversion module, a capacitor module, and a control module. The capacitor module is electrically connected to the power conversion module, the power conversion module is electrically connected to the control module, and the power conversion module includes a MOS tube; The heat dissipation module includes a metal heat sink, an insulating connection part, and an insulating heat conductive part. The metal heat sink and the power conversion module are connected through the insulating connection part. The insulating heat conductive part is located between the metal heat sink and the power conversion module and is adjacent to the MOS tube.

2. The energy storage converter according to claim 1, characterized in that: The power conversion module comprises a power substrate and an electrode, wherein the power substrate is connected to the insulating connection portion, and the electrode and the MOS tube are arranged on the power substrate; The MOS tube and part of the electrodes are located within a projection area of ​​the insulating heat-conducting component on the power substrate, and are located on a side of the power substrate facing the insulating heat-conducting component.

3. The energy storage converter according to claim 2, characterized in that: The power conversion module further includes a first fixing member, wherein the first fixing member and the insulating heat conductive member are distributed on both sides of the power substrate, and the first fixing member is connected to the metal heat sink to adjust the distance between the power substrate and the metal heat sink so that the MOS tube and part of the electrode fit the insulating heat conductive member; Wherein, the first fixing member is a pressure strip, the pressure strip is distributed in the middle of the power substrate, and the number of the pressure strip is at least one.

4. The energy storage converter according to claim 2, characterized in that: The power conversion module further includes a second fixing member connected to an end portion of the power substrate, wherein the second fixing member is configured to limit deformation of the end portion of the power substrate.

5. The energy storage converter according to claim 3, characterized in that: There are multiple insulating connection parts, which are spaced apart to form an installation space. The insulating heat-conducting member is an insulating heat-conducting film, which abuts against the insulating connection parts and is confined within the installation space. The power conversion module also includes a first connector, which is connected to the insulating connecting part to connect the first fixing part, the power substrate, and the metal heat sink. The first connector is connected to the insulating connecting part and is also configured to adjust the pressing state of the insulating thermal conductive film and the metal heat sink.

6. The energy storage converter according to claim 2, characterized in that: The power conversion module further includes a first conductive connection portion and a second conductive connection portion connected to the power substrate, wherein the first conductive connection portion and the second conductive connection portion correspond to and are electrically connected to the electrode; The capacitor module includes a capacitor plate, a first metal connector and a second metal connector. The capacitor plate and the insulating thermal conductor are distributed on both sides of the power substrate. The first metal connector is connected to the first conductive connecting portion to connect the power substrate and the capacitor plate. The second metal connector is connected to the second conductive connecting portion to connect the power substrate and the capacitor plate.

7. The energy storage converter according to claim 6, characterized in that: Also includes: An insulating support shell, the insulating support shell is located on a side of the capacitor plate away from the power substrate; The control module comprises a control board, which is mounted on the insulating support shell and located on a side of the support shell away from the capacitor plate; The power conversion module further includes a driving board connected to the power substrate and electrically connected to the power substrate, wherein the driving board and the control board are electrically connected via a plug-in structure, and the plug-in structure is provided through the capacitor plate and the support shell; The plug-in structure comprises a matching plug-in portion and a socket portion, one of the plug-in portion and the socket portion is arranged on the driving board, and the other is arranged on the control board.

8. The energy storage converter according to claim 7, characterized in that: Also includes: a third metal connector, the third metal connector being connected to the second metal connector to connect the insulating support shell and the capacitor plate; an insulating film, mounted on the insulating support shell and located on a side of the insulating support shell facing the control board, the insulating film being used to electrically isolate the third metal connector from the control board; Wherein, the insulating film is also provided with an avoidance hole for avoiding the plug-in structure.

9. The energy storage converter according to claim 8, characterized in that: The end of the first conductive connection portion away from the power substrate is configured as an internal thread structure; The end of the second conductive connection portion away from the power substrate is configured as an internal thread structure; The first metal connecting member is a screw; The end portion of the second metal connector connected to the first conductive connector is configured as an external thread structure, and the end portion connected to the third metal connector is configured as an internal thread structure; The third metal connecting member is a screw.

10. The energy storage converter according to claim 2, characterized in that: The metal heat sink includes a first part and a second part connected to each other, the first part is connected to the power substrate, the first part is configured as a plate-like structure and is arranged opposite to the insulating heat conductive member, the second part is located on a side of the first part away from the insulating heat conductive member, and a mounting portion is provided on the second part.

Images