Voltage converter, battery pack and energy storage device

Abstract

The utility model discloses a voltage converter, a battery pack and an energy storage device. The voltage converter comprises an insulation support and a voltage conversion plate. The insulation support comprises an insulation enclosure, the voltage conversion plate is installed on the insulation support, and the insulation enclosure can surround the periphery of the voltage conversion plate. The voltage conversion plate is installed on the insulation support, the voltage conversion plate can be wrapped in the insulation support through the insulation baffle of the insulation support, it is guaranteed that the voltage conversion plate is well insulated, and the high-voltage side of the voltage converter and the box body made of die-casting aluminum can be mutually isolated through the insulation support; the phenomenon of short circuit of an internal circuit of the energy storage device caused by insufficient creepage distance can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly relates to a voltage converter, a battery pack, and an energy storage device. Background Art

[0002] The energy storage device includes one or more battery packs. The battery pack mainly includes a box body, a voltage converter, and a battery cell assembly. The voltage converter generates heat during operation and needs to be cooled to ensure the normal operation and service life of the battery pack. The box body is generally made of die-cast aluminum. After the voltage converter is installed in the die-cast aluminum box body of the energy storage device, the high-voltage side of the voltage converter is very close to the die-cast aluminum box body, which is likely to cause insufficient creepage distance and short circuit of the internal circuit of the energy storage device. Utility Model Content

[0003] In view of this, this application aims to solve at least one of the problems in the related art to some extent. For this purpose, the purpose of this application is to provide a voltage converter, a battery pack, and an energy storage device.

[0004] This application provides a voltage converter. The voltage converter includes an insulating bracket and a voltage conversion board. The insulating bracket includes an insulating enclosure; the voltage conversion board is installed on the insulating bracket, and the insulating enclosure can surround the outer periphery of the voltage conversion board.

[0005] In some embodiments, through holes are provided at the bottom of the insulating bracket, and the insulating enclosure is arranged around the outer periphery of the bottom.

[0006] In some embodiments, the voltage converter further includes a heat dissipation bracket, the insulating bracket is installed on the heat dissipation bracket, the heat dissipation bracket includes a heat dissipation boss, and the heat dissipation boss of the heat dissipation bracket is arranged within a position range corresponding to the through holes.

[0007] In some embodiments, the heat dissipation bracket includes a plurality of heat dissipation bosses, and the plurality of heat dissipation bosses of the heat dissipation bracket are arranged within a position range corresponding to the through holes.

[0008] In some embodiments, the insulating bracket further has insulating bosses, and the insulating bosses are used to separate the power-taking posts on the voltage conversion board from the heat dissipation fins of the heat dissipation bracket, and the number of the insulating bosses corresponds to the number of the power-taking posts.

[0009] In some embodiments, the voltage converter further includes a sealing ring, the sealing ring is installed on the heat dissipation bracket, the insulating bracket is installed within the sealing ring, and the voltage conversion board is installed on the insulating bracket.

[0010] In some embodiments, the voltage conversion board includes support columns, and the voltage converter further includes a battery management circuit board, which is mounted on the voltage conversion board through the support columns.

[0011] In some embodiments, the insulating enclosure is further provided with mounting holes, and the voltage conversion board is mounted in the insulating bracket by cooperating bolts with the mounting holes.

[0012] This application also provides a battery pack. The battery pack includes a box body, a battery cell assembly, and the voltage converter according to any one of the above embodiments.

[0013] This application also provides an energy storage device. The energy storage device includes the battery pack according to the above embodiments.

[0014] In the energy storage device of this application, the voltage conversion board in the battery pack is mounted on the insulating bracket, and the voltage conversion board can be wrapped inside the insulating bracket through the insulating baffle of the insulating bracket, ensuring good insulation of the voltage conversion board, so that the high-voltage side of the voltage converter and the box body made of die-cast aluminum can be isolated from each other through the insulating bracket, and the phenomenon that the internal circuit of the energy storage device is short-circuited due to insufficient creepage distance can be avoided.

[0015] Additional aspects and advantages of this application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of this application. Description of the Drawings

[0016] The above and / or additional aspects and advantages of this application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, in which:

[0017] Figure 1 is a schematic structural diagram of an energy storage device according to some embodiments of this application;

[0018] Figure 2 is a schematic structural diagram of a battery pack according to some embodiments of this application;

[0019] Figure 3 is a schematic structural diagram of a battery pack with a battery cell assembly according to some embodiments of this application;

[0020] Figure 4 is a schematic structural diagram of a voltage converter according to some embodiments of this application;

[0021] Figure 5 is a schematic structural diagram of an insulating bracket in a voltage converter according to some embodiments of this application;

[0022] Figure 6 is a schematic structural diagram of an insulating bracket in a voltage converter according to some embodiments of this application;

[0023] Figure 7 is a schematic structural diagram of an insulating bracket in a voltage converter according to some embodiments of the present application;

[0024] Figure 8 is a schematic structural diagram of an insulating bracket in a voltage converter according to some embodiments of the present application.

[0025] Description of the main reference numerals in the drawings:

[0026] Energy storage device 1000;

[0027] Battery pack 100; Control unit 200; Base 300;

[0028] Voltage converter 10; Insulating bracket 11, Insulating enclosure 111, Mounting hole 1111, Through hole 112, Insulating boss 113, Insulating base plate 1131, Insulating side wall 1132; Voltage conversion board 12, Outer periphery 121 of the voltage conversion board, Power taking column 122, Positive power taking column 1221 on the high voltage side, Negative power taking column 1222 on the high voltage side, Positive power taking column 1223 on the low voltage side, Negative power taking column 1224 on the low voltage side, Sealing ring 123; Heat dissipation bracket 13, Heat dissipation boss 131, First heat dissipation boss 1311, Second heat dissipation boss 1312, Heat dissipation fin 133; Battery management circuit board 14; Box body 20, Battery compartment housing 21, First housing 211, Second housing 212; Battery cell assembly 30, Copper busbar 31, Total positive copper busbar 311, Total negative copper busbar 312. Detailed implementation manners

[0029] The following describes in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0030] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0031] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense, which may refer to fixed connection, detachable connection, or integral connection; it may be mechanical connection, electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between various embodiments and / or settings discussed.

[0033] The embodiments of the present application are described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0034] Please refer to Figure 1 and Figure 2 , the present application discloses an energy storage device 1000. The energy storage device 1000 includes a battery pack 100. The energy storage device 100 includes a battery pack 100, a control unit 200, and a base 300. The number of battery packs 100 may be at least two, and at least two battery packs 100 are sequentially stacked between the base 300 and the control unit 200. The base 300 is used to support the battery pack 100. The control unit 200 is located on top of the battery pack 100. The control unit 200 is electrically connected to the battery pack 100. For example, the control unit 200 can be used to control the charging, discharging, or usage status of the battery pack 100, etc.

[0035] Please refer to Figure 2 and Figure 3 , the battery pack 100 of the present application includes a voltage converter 10, a box body 20, and a battery cell assembly 30. The control unit 200 can be electrically connected to the voltage converter 10 and / or a load. The voltage converter 10 and the battery cell assembly 30 are assembled inside the box body 20, and the voltage converter 10 is electrically connected to the battery cell assembly 30.

[0036] The box body 20 includes a battery compartment housing 21, and the inside of the battery compartment housing 21 can accommodate a battery cell assembly 30. The battery cell assembly 30 may include a plurality of battery cells, power lines, signal lines, and copper bars 31 connecting the battery cells. The copper bars 31 include a total positive copper bar 311 and a total negative copper bar 312.

[0037] The battery compartment housing 21 includes a first housing 211 and a second housing 212 that are oppositely arranged. The box body 20 further includes a connecting member 22, and the connecting member 22 is connected to the battery compartment housing 21. For example, the connecting member 22 is fixed to the battery compartment housing 21 by screws. As Figure 2 shown, the connecting member 22 may be located on the first housing 211 of the battery compartment housing 21, and a part of the connecting member 22 extends beyond the top of the first housing 211 of the battery compartment housing 21. During the stacking process of the battery pack 100, the part of the connecting member 22 that extends beyond the top of the battery compartment housing 21 is used to fix the battery compartment housing 21 of the adjacent box body 20.

[0038] Please refer to Figure 4 and Figure 5 , the voltage converter 10 of the present application includes an insulating bracket 11 and a voltage conversion board 12. The insulating bracket 11 includes an insulating enclosure 111. The voltage conversion board 12 is mounted on the insulating bracket 11, and the insulating enclosure 111 can enclose the outer periphery 121 of the voltage conversion board 12.

[0039] The insulating bracket 11 may be a bracket made of plastic or a bracket made of other insulating materials, which is not limited herein.

[0040] The insulating enclosure 111 may be a straight strip-shaped sheet baffle or a curved sheet baffle relative to the outer periphery 121 of the voltage conversion board 12. The curve may be bent towards the voltage conversion board 12 or away from the voltage conversion board 12, which is not limited herein.

[0041] In this way, the voltage conversion board 12 of the present application is mounted on the insulating bracket 11, and the voltage conversion board 12 can be wrapped inside the insulating bracket 11 by the insulating baffle 111 of the insulating bracket 11 to ensure good insulation. Thus, after the voltage converter 10 is installed in the box body 20, the high-voltage side of the voltage conversion board 12 and the box body 20 made of die-cast aluminum can be isolated from each other through the insulating bracket 11, and the phenomenon that the internal circuit of the energy storage device 1000 is short-circuited due to insufficient creepage distance can be avoided.

[0042] Please refer to Figure 5, a through hole 112 is provided at the bottom of the insulating bracket 11. The insulating enclosure 111 is disposed around the outer periphery of the bottom of the insulating bracket 11. Specifically, a through hole 112 is provided at the bottom of the insulating bracket 11 of the present application, and the insulating bracket 11 is in a hollow state, so that on the basis that the voltage converter 10 can be separated from the box body 20 by the insulating enclosure 111 to avoid short - circuit phenomena, the connection between the voltage conversion board 12 and the heat dissipation module or other components in the voltage converter 10 is not affected.

[0043] In addition, the voltage converter 10 further includes a heat dissipation bracket 13. The insulating bracket 11 is mounted on the heat dissipation bracket 13. The heat dissipation bracket 13 includes a heat dissipation boss 131, and the heat dissipation boss 131 of the heat dissipation bracket 13 is disposed within a position range corresponding to the through hole 112. That is to say, the hollow design of the bottom of the insulating bracket 11 of the present application can, while ensuring the insulation performance, also not hinder the heat dissipation effect of the heat dissipation boss of the heat dissipation bracket 11 on the components on the voltage conversion board 12, achieving the balance between insulation and heat dissipation.

[0044] Specifically, please refer to Figure 6 , the heat dissipation bracket 13 includes a plurality of heat dissipation bosses 131, and the plurality of heat dissipation bosses 131 of the heat dissipation bracket 13 are disposed within a position range corresponding to the through hole 112. That is to say, the hollow design of the bottom of the insulating bracket 11 of the present application can, while ensuring the insulation performance, also not hinder the heat dissipation effect of the plurality of heat dissipation bosses of the heat dissipation bracket 11 on the plurality of components on the voltage conversion board 12, achieving the balance between insulation and heat dissipation.

[0045] For example, the plurality of heat dissipation bosses 131 include a first heat dissipation boss 1311 and a second heat dissipation boss 1312. The first heat dissipation boss 1311 and the second heat dissipation boss 1312 are disposed within a position range corresponding to the through hole 112, which can enable the bottom of the insulating bracket 11 to avoid the first heat dissipation boss 1311 and the second heat dissipation boss 1312 of the heat dissipation bracket 13, so that the heat generated by the operation of the transformer and inductor on the voltage conversion board 12 can be conducted out through the first heat dissipation boss 1311 and the second heat dissipation boss 1312 of the heat dissipation bracket 13.

[0046] That is to say, the heat dissipation boss 131 of the present application can be a boss protruding from the heat dissipation bracket 13, and the center of the heat dissipation boss 131 can be a perforation, so that the heat generated by the operation of the transformer and inductor on the voltage conversion board 12 can be conducted out through the protruding structure and the perforation of the heat dissipation boss 131 together.

[0047] Please refer to Figures 4 to 8, in some embodiments, the insulating bracket 11 is further provided with insulating bosses 113. The insulating bosses 113 are used to separate the power-taking posts 122 on the voltage conversion board 12 from the heat dissipation fins 133 of the heat dissipation bracket 13. The number of insulating bosses 113 corresponds to the number of power-taking posts 122. That is, the isolation plate at the bottom of the insulating boss 113 constitutes the insulating bottom plate 1131, and the baffle around the insulating bottom plate 1131 of the insulating boss 113 constitutes the insulating side wall 1132.

[0048] Specifically, please refer to Figure 7 , the voltage conversion board 12 may be provided with power-taking posts 122. The power-taking posts 122 may be copper posts, and the power-taking posts 122 are used for power-taking or connecting other electronic components. The power-taking posts 122 may include a positive power-taking post and a negative power-taking post.

[0049] It can be understood that in the voltage converter 10, a certain electrical insulation needs to be maintained between the metal components (such as copper posts) and the heat dissipation components (such as heat dissipation fins) to prevent short circuits or other electrical faults.

[0050] Since the insulating bosses 113 are made of insulating materials, they can effectively isolate the copper posts and the heat dissipation fins 133, ensuring that there is no electrical contact between the copper posts and the heat dissipation fins 133, ensuring that appropriate electrical insulation can be maintained between the copper posts on the voltage conversion board 12 and the heat dissipation fins 133 of the heat dissipation bracket 13, thereby ensuring the normal operation and safety of the voltage converter 10.

[0051] The number of insulating bosses 113 corresponding to the number of power-taking posts 122 means that the number of insulating bosses 113 can correspond one-to-one with the number of power-taking posts 122, or one insulating boss 113 can correspond to multiple power-taking posts 122.

[0052] For example, in one embodiment, the voltage conversion board 12 is provided with 4 power-taking posts 122. Then, the insulating bosses 113 on the insulating bracket 11 can be 4, so that the number of insulating bosses 113 can correspond one-to-one with the number of power-taking posts 122.

[0053] In another embodiment, Figure 7 , the voltage conversion board 12 is provided with 4 power-taking posts 122, namely the positive power-taking post 1221 and the negative power-taking post 1222 on the high-voltage side, and the positive power-taking post 1223 and the negative power-taking post 1224 on the low-voltage side. At this time, the insulating bosses 113 on the insulating bracket 11 can be 3, that is, one of the insulating bosses 113 can correspond to 2 power-taking posts 122, and the other two insulating bosses 113 respectively correspond to the other 2 power-taking posts 122.

[0054] Please refer to Figure 4, in some embodiments, the voltage converter 10 further includes a sealing ring 123. The sealing ring 123 is installed on the heat dissipation bracket 13, the insulating bracket 11 is installed inside the sealing ring 123, and the voltage conversion board 12 is installed on the insulating bracket 13.

[0055] The sealing ring 123 can be made of rubber or other materials, which is not limited herein.

[0056] That is to say, the voltage converter 10 of the present application can seal the outer peripheral wall of the insulating bracket 11 through the sealing ring 123, which is beneficial to further isolate the high-voltage side of the voltage conversion board 12 from the box body 20 made of die-cast aluminum through the insulating bracket 11 and the sealing ring 123, thereby further ensuring to avoid the phenomenon that the internal circuit of the energy storage device 1000 is short-circuited due to insufficient creepage distance.

[0057] In addition, the voltage converter 10 of the present application is provided with the sealing ring 123, which can also avoid the friction between the insulating bracket 11 and the box body 20 and cause wear of the outer peripheral wall of the insulating bracket 11, and improve the service life of the insulating bracket 11.

[0058] In some embodiments, the voltage conversion board 12 includes support columns. The voltage converter 10 further includes a battery management circuit board 14, and the battery management circuit board 14 is installed on the voltage conversion board 12 through the support columns. The support columns can be hexagonal copper columns, and 4 support columns can be provided. The 4 support columns are respectively arranged at the 4 corners of the voltage conversion board 12.

[0059] That is, the integration of the voltage conversion board 12 and the battery management circuit board 14 in the voltage converter 10 of the present application enables the voltage converter 10 of the present application to be applied to an energy storage solution for large-capacity household energy storage, and the large-capacity stored energy is, for example, 280Ah.

[0060] The integration of the voltage conversion board 12 and the battery management circuit board 14 in the voltage converter 10 of the present application can also make more space for the layout of the voltage converter 10 within the limited space of the voltage converter 10, for example, the area of the voltage converter 10 is 233*245, and can make the power of the voltage converter 10 reach a preset maximum power value. The preset maximum power value is, for example, 3.5KW or other values, which is not limited herein.

[0061] Please refer to Figure 5 , the insulating enclosure 111 of the present application is also provided with mounting holes 1111, and the voltage conversion board 12 is installed in the insulating bracket 11 through cooperation with the mounting holes 111 by bolts. For example, as Figure 3As shown, the mounting holes 1111 can be arranged to avoid the busbars provided on the voltage conversion board 12, so that the voltage conversion board 12 can be fixedly installed inside the insulating bracket 11 through bolts in cooperation with the mounting holes 1111.

[0062] Multiple busbars can be provided on the voltage conversion board 12. When multiple busbars are provided on the voltage conversion board 12, the number of mounting holes 1111 can also be multiple. For example, Figure 3 As shown, when there are 2 busbars provided on the voltage conversion board 12, the number of mounting holes 1111 can also be 2.

[0063] The above embodiments only illustrate several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A voltage converter, characterized in that: The voltage converter comprises: an insulating support, the insulating support comprising an insulating enclosure; and A voltage conversion board is mounted on the insulating bracket, and the insulating enclosure can enclose the outer periphery of the voltage conversion board.

2. The voltage converter according to claim 1, characterized in that A through hole is provided at the bottom of the insulating bracket, and the insulating enclosure is arranged around the outer periphery of the bottom.

3. The voltage converter according to claim 2, characterized in that: The voltage converter further comprises a heat dissipation support, the insulating support is mounted on the heat dissipation support, the heat dissipation support comprises a heat dissipation boss, and the heat dissipation boss of the heat dissipation support is arranged within a position range corresponding to the through hole.

4. The voltage converter according to claim 3, characterized in that: The heat dissipation bracket comprises a plurality of heat dissipation bosses, and the plurality of heat dissipation bosses of the heat dissipation bracket are arranged within a position range corresponding to the through hole.

5. The voltage converter according to claim 4, characterized in that: The insulating support is further provided with an insulating boss, which is used to separate the power-taking posts on the voltage conversion board from the heat sink of the heat dissipation support, and the number of the insulating bosses corresponds to the number of the power-taking posts.

6. The voltage converter according to claim 4, characterized in that: The voltage converter further comprises a sealing ring, wherein the sealing ring is mounted on the heat dissipation bracket, the insulating bracket is mounted in the sealing ring, and the voltage conversion board is mounted on the insulating bracket.

7. The voltage converter according to claim 6, characterized in that The voltage conversion board includes a support column, and the voltage converter further includes a battery management circuit board, and the battery management circuit board is mounted on the voltage conversion board through the support column.

8. The voltage converter according to claim 2, characterized in that: The insulating enclosure is also provided with a mounting hole, and the voltage conversion plate is mounted in the insulating bracket by bolts in cooperation with the mounting hole.

9. A battery pack, characterized in that: The battery pack comprises a case, a battery cell assembly and a voltage converter according to any one of claims 1 to 8.

10. An energy storage device, characterized in that: The energy storage device comprises the battery pack as described in claim 9 above.

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