Circuit board assembly and energy storage device

Abstract

The application provides a circuit board assembly and an energy storage device. The energy storage device comprises a shell provided with a mounting surface, and the circuit board assembly comprises a first circuit board and a second circuit board. The first circuit board and the second circuit board are arranged on the mounting surface. The first circuit board is fixed with a terminal, and the terminal is provided with a supporting rib on the side away from the mounting surface. Part of the second circuit board is located on the side of the first circuit board away from the shell. In the direction perpendicular to the mounting surface, the first circuit board has a first overlapping area, the second circuit board has a second overlapping area, and the supporting rib is located in the first overlapping area and supports the second overlapping area. By interleaving and stacking the first circuit board and the second circuit board, the total area of the first circuit board and the second circuit board occupying the mounting surface can be reduced. The second overlapping area is supported by the supporting rib, so as to avoid the second overlapping area being suspended and improve the stability of the second circuit board. The problem that the second overlapping area lacks support due to the inability to install screws is solved, so as to improve the reliability of the energy storage device.

Description

Technical Field

[0001] This application relates to the field of circuit board assembly, specifically a circuit board assembly and an energy storage device. Background Technology

[0002] Currently, in the assembly of energy storage devices, the limited internal space makes it difficult to install large circuit boards. To address this, related technologies divide large circuit boards into multiple smaller boards and install them in an alternating manner. However, while circuit boards are typically secured with screws at their edges and corners, this alternating installation can leave sections of the board unsupported, increasing the risk of vibration and breakage during transport and handling, thus affecting the reliability of the energy storage device. Utility Model Content

[0003] In view of this, this application provides a circuit board assembly and energy storage device that can improve space utilization and stability.

[0004] One embodiment of this application provides a circuit board assembly for use in an energy storage device. The energy storage device includes a housing with a mounting surface. The circuit board assembly includes a first circuit board and a second circuit board. The first circuit board is disposed on the mounting surface and has terminals fixed thereon. The terminals protrude from the side of the first circuit board facing away from the mounting surface, and the side of the terminals facing away from the mounting surface has supporting ribs. The second circuit board is disposed on the mounting surface, with a portion of the second circuit board located on the side of the first circuit board facing away from the housing. Along a direction perpendicular to the mounting surface, the portion of the first circuit board covered by the projection of the second circuit board is a first overlapping area, and the portion of the second circuit board covered by the projection of the first circuit board is a second overlapping area. At least a portion of the supporting ribs is located within the first overlapping area and supports the second overlapping area.

[0005] The circuit board assembly provided in this application reduces the total area occupied by the first and second circuit boards on the mounting surface by staggering the two separate circuit boards. Compared with the method of laying the first and second circuit boards side by side, it can reduce the space occupied inside the energy storage device and improve space utilization. In addition, the circuit board assembly provided in this application also has a first circuit board protruding from the side of the terminal facing away from the mounting surface and is provided with a support rib. The support rib is arranged in the first overlapping area to support the second overlapping area. After the first and second circuit boards are assembled to the mounting surface, the second overlapping area can be supported by the support rib, avoiding the second overlapping area being suspended, improving the stability of the second circuit board, and solving the problem of lack of support in the second overlapping area due to the inability to install screws. This makes the second circuit board sufficient to withstand vibration during daily transportation and handling, reducing the risk of breakage, thereby improving the reliability of the energy storage device.

[0006] In some embodiments, the support rib extends away from the mounting surface in a direction perpendicular to the mounting surface and overlaps the edge of the second circuit board.

[0007] In some embodiments, there are multiple support ribs, which are spaced apart at the terminals and all support the edges of the second circuit board.

[0008] In some embodiments, the first overlapping area is provided with a clearance hole, and the second circuit board is provided with an electrical connector, at least a portion of which is located in the second overlapping area and passes through the clearance hole.

[0009] In some embodiments, the second circuit board has a recessed groove in the second overlap area, the recessed groove being for terminals to pass through and protruding from the side of the second circuit board opposite to the mounting surface.

[0010] In some embodiments, the area of ​​the first circuit board facing away from the mounting surface and located outside the first overlap area has a plurality of electronic devices of substantially the same height, and the area of ​​the second circuit board facing away from the mounting surface and located outside the second overlap area has a plurality of electronic devices of substantially the same height, wherein the height of the electronic devices on the first circuit board is greater than the height of the electronic devices on the second circuit board.

[0011] In some embodiments, the terminal includes a body and a bracket, the bracket is sleeved on the body and fixed to the body, the bracket is fixed to the first circuit board, and the support rib is located on the bracket.

[0012] In some embodiments, the bracket includes a housing and a connecting ear. The housing is fitted onto the main body, the connecting ear is fixedly connected to the housing and fixed to the mounting surface, and the first circuit board has a bracket hole through which the main body passes.

[0013] In one embodiment of this application, an energy storage device is also provided. The energy storage device includes a housing and a circuit board assembly as described in any of the above embodiments. The housing has a mounting surface, and the first circuit board and the second circuit board of the circuit board assembly are disposed on the mounting surface.

[0014] The energy storage device provided in this application uses the aforementioned circuit board assembly to alternately stack the separate first and second circuit boards, which reduces the total area occupied by the first and second circuit boards on the mounting surface. Compared to the method of laying the first and second circuit boards side by side, this reduces the space occupied inside the energy storage device and improves space utilization. In addition, the first circuit board protrudes from the side of the terminal facing away from the mounting surface and is provided with support ribs. The support ribs are also arranged in the first overlapping area to support the second overlapping area. This allows the second overlapping area to be supported by the support ribs after the first and second circuit boards are assembled onto the mounting surface, preventing the second overlapping area from being suspended and improving the stability of the second circuit board. This solves the problem of the second overlapping area lacking support due to the inability to install screws, making the second circuit board sufficient to withstand vibration during daily transportation and handling, reducing the risk of breakage, and thus improving the reliability of the energy storage device.

[0015] In some embodiments, a rib is provided on the side of the mounting surface facing the first circuit board, and the rib supports the first circuit board. Attached Figure Description

[0016] Figure 1 This is a perspective view of an energy storage device according to one embodiment of this application.

[0017] Figure 2 for Figure 1 An exploded view of the energy storage device.

[0018] Figure 3 This is an exploded view of the circuit board assembly and mounting surface in one embodiment of this application.

[0019] Figure 4 for Figure 3 A 3D view of the circuit board assembly and mounting surface after assembly.

[0020] Figure 5 for Figure 3 A perspective view of the circuit board assembly during the disassembly of the second circuit board and the assembly of the first circuit board.

[0021] Figure 6 for Figure 3 A three-dimensional view of the first and second circuit boards from another perspective.

[0022] Figure 7 for Figure 3 Enlarged view of point A in the middle.

[0023] Explanation of main component symbols 100. Circuit board assembly; 200. Energy storage device; 201. Housing; 202. Mounting surface; 2021. Exposed hole; 203. Rib; 204. Mounting hole; 205. Positioning post; 10. First circuit board; 11. Terminal; 111. Support rib; 112. Main body; 113. Bracket; 1131. Shell; 1132. Connecting ear; 1133. Flange; 1134. Snap-fit; 1135. Third through hole; 12. First overlapping area; 13. Clearance hole; 14. Electronic component; 15. Bracket hole; 16. First through hole; 17. Positioning hole; 20. Second circuit board; 21. Second overlapping area; 22. Electrical connector; 23. Clearance groove; 24. Electronic component; 25. Second through hole; 26. Terminal; 300. Screw. Detailed Implementation

[0024] The technical solution of this application will now be described with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments.

[0025] It should be noted that when an element is considered to be "connected to" or "located on" another element, it can be directly connected to the other element or may have an element centrally located. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "fixed," etc., should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The terms "first," "second," etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary / secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified. The shape descriptions in the embodiments of this application are merely illustrative and should not constitute any absolute limitation on this application. The terms "vertical" and "parallel" are used to describe the ideal state between two components; in actual production or use, a state approximately vertical or parallel may exist.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. Where there is no conflict, the various embodiments in this application can be combined with each other.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms “comprising,” “having,” and “equipped with,” and any variations thereof, in the description, claims, and foregoing drawings of this application, are intended to cover non-exclusive inclusion.

[0028] Currently, in the assembly of energy storage devices, the limited internal space makes it difficult to install large circuit boards. To address this, related technologies divide large circuit boards into multiple smaller boards and install them in an alternating manner. However, while circuit boards are typically secured with screws at their edges and corners, this alternating installation can leave sections of the board unsupported, increasing the risk of vibration and breakage during transport and handling, thus affecting the reliability of the energy storage device.

[0029] In view of this, this application provides a circuit board assembly and an energy storage device that can improve space utilization and stability. The circuit board assembly is applied to the energy storage device, which includes a housing with a mounting surface. The circuit board assembly includes a first circuit board and a second circuit board. The first circuit board is disposed on the mounting surface and has terminals fixed thereon. The terminals protrude from the side of the first circuit board away from the mounting surface, and the side of the terminals away from the mounting surface has supporting ribs. The second circuit board is disposed on the mounting surface, with a portion of the second circuit board located on the side of the first circuit board away from the housing. Along a direction perpendicular to the mounting surface, the portion of the first circuit board covered by the projection of the second circuit board is a first overlapping area, and the portion of the second circuit board covered by the projection of the first circuit board is a second overlapping area. At least a portion of the supporting ribs is located within the first overlapping area and supports the second overlapping area.

[0030] The circuit board assembly provided in this application reduces the total area occupied by the first and second circuit boards on the mounting surface by staggering the two separate circuit boards. Compared with the method of laying the first and second circuit boards side by side, it can reduce the space occupied inside the energy storage device and improve space utilization. In addition, the circuit board assembly provided in this application also has a first circuit board protruding from the side of the terminal facing away from the mounting surface and is provided with a support rib. The support rib is arranged in the first overlapping area to support the second overlapping area. After the first and second circuit boards are assembled to the mounting surface, the second overlapping area can be supported by the support rib, avoiding the second overlapping area being suspended, improving the stability of the second circuit board, and solving the problem of lack of support in the second overlapping area due to the inability to install screws. This makes the second circuit board sufficient to withstand vibration during daily transportation and handling, reducing the risk of breakage, thereby improving the reliability of the energy storage device.

[0031] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, this application embodiment provides a circuit board assembly 100 and an energy storage device 200. The energy storage device 200 includes a housing 201 and a circuit board assembly 100. The housing 201 is provided with a mounting surface 202. The circuit board assembly 100 includes a first circuit board 10 and a second circuit board 20. Both the first circuit board 10 and the second circuit board 20 are disposed on the mounting surface 202. The first circuit board 10 and the second circuit board 20 can serve as terminal modules of the energy storage device 200 for plugging into the plugs of external devices, so that the energy storage device 200 supplies power to external devices or allows external devices to charge the energy storage device 200. For example, the external devices can be electrical appliances, solar panels, or household power supply devices, etc. The energy storage device 200 can be a portable power source for outdoor scenarios or a household energy storage system for storing energy in the home, etc.

[0033] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, a terminal 11 is fixed on the first circuit board 10. The terminal 11 protrudes from the side of the first circuit board 10 facing away from the mounting surface 202. A support rib 111 is provided on the side of the terminal 11 facing away from the mounting surface 202. A portion of the second circuit board 20 is located on the side of the first circuit board 10 facing away from the mounting surface 202. Along a direction perpendicular to the mounting surface 202, the portion of the first circuit board 10 covered by the projection of the second circuit board 20 is the first overlapping area 12, and the portion of the second circuit board 20 covered by the projection of the first circuit board 10 is the second overlapping area 21. At least a portion of the support rib 111 is located within the first overlapping area 12 and supports the second overlapping area 21.

[0034] The circuit board assembly 100 described above reduces the total area occupied by the first circuit board 10 and the second circuit board 20 on the mounting surface 202 by stacking the two separate circuit boards 10 and 20. Compared with the method of laying the first circuit board 10 and the second circuit board 20 side by side, it can reduce the space occupied inside the energy storage device 200 and improve the space utilization rate. In addition, the circuit board assembly 100 also has a support rib 111 on the side of the terminal 11 facing away from the mounting surface 202, and the support rib 111 is arranged in the first overlapping area 12 to support the second overlapping area 21. After the first circuit board 10 and the second circuit board 20 are assembled onto the mounting surface 202, the second overlapping area 21 can be supported by the support rib 111, avoiding the second overlapping area 21 from being suspended, improving the stability of the second circuit board 20, solving the problem that the second overlapping area 21 lacks support due to the inability to install screws, and making the second circuit board 20 sufficient to withstand vibration during daily transportation and handling, reducing the risk of breakage, thereby improving the reliability of the energy storage device 200.

[0035] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the support rib 111 extends protruding from the mounting surface 202 and away from it. The support rib 111 overlaps the second overlapping area 21 at the edge of the second circuit board 20, so that the support rib 111 directly supports the edge of the second circuit board 20. Since the second circuit board 20 is fixed to the mounting surface 202 by screws 300 in the area outside the second overlapping area 21, the distance L between the support rib 111 and the screws 300 can be maximized by supporting the edge of the second circuit board 20 with the support rib 111. Thus, according to the lever principle, with the screws 300 as the fulcrum, when the second circuit board 20 is subjected to torque, the force between the support rib 111 and the second circuit board 20 can be minimized, thereby reducing the interaction force between the second circuit board 20 and the first circuit board 10, thereby reducing the risk of breakage of the second circuit board 20 and the first circuit board 10, and improving the reliability of the second circuit board 20 and the first circuit board 10.

[0036] In some embodiments, such as Figure 4 As shown, there are multiple support ribs 111, which are spaced apart at the terminal 11. Each support rib 111 is used to support the edge of the second circuit board 20. Each support rib 111 extends along the edge of the second circuit board 20, thereby increasing the area supported on the edge of the second circuit board 20, reducing stress concentration between the support rib 111 and the second circuit board 20, and improving the stability of the second circuit board 20.

[0037] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the first overlapping area 12 is provided with a clearance hole 13, and the second circuit board 20 is provided with an electrical connector 22. At least a portion of the electrical connector 22 is located within the second overlapping area 21 and passes through the clearance hole 13. Since the thickness of the electrical connector 22 is greater than the distance between the first overlapping area 12 and the second overlapping area 21, the end of the electrical connector 22 facing the mounting surface 202 is prone to interfering with the first overlapping area 12. However, the electrical connector 22 can avoid the first overlapping area 12 through the clearance hole 13, thus preventing the electrical connector 22 from interfering with the first overlapping area 12 and improving the ease of installation of the first circuit board 10 and the second circuit board 20. For example, the electrical connector 22 is used to electrically connect to a busbar and, through the busbar, to other components in the energy storage device 200, such as a battery pack or inverter.

[0038] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the second circuit board 20 is provided with a relief groove 23 in the second overlapping area 21. The relief groove 23 allows part of the terminal 11 to pass through, so that the terminal 11 protrudes from the side of the second circuit board 20 away from the mounting surface 202, avoiding interference between the first circuit board 10 and the second circuit board 20 due to the terminal 11. This allows the first circuit board 10 and the second circuit board 20 to be stacked alternately, and also reduces the distance between the first circuit board 10 and the second circuit board 20, improving space utilization.

[0039] Optionally, the recess 23 extends through the second overlapping area 21 on the side facing the terminal 11, so that when installing the second circuit board 20, the terminal 11 can enter the recess 23 through the opening of the recess 23 without the need for alignment of the recess 23 and the terminal 11, thereby improving the ease of installation.

[0040] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the first circuit board 10 has multiple electronic devices 14 of substantially the same height on the side facing away from the mounting surface 202 and outside the first overlap area 12. The second circuit board 20 has multiple electronic devices 24 of substantially the same height on the side facing away from the mounting surface 202 and outside the second overlap area 21. The height of the electronic devices 14 on the first circuit board 10 is greater than the height of the electronic devices 24 on the second circuit board 20. Exemplarily, the electronic devices 14 and 24 can be transistors, resistors, capacitors, etc.

[0041] It should be noted that "electronic devices 14 with essentially the same height" refers to multiple electronic devices 14 whose height differences are within a certain range to accommodate wave soldering. They are not necessarily identical in height. By placing multiple electronic devices 14 with height differences suitable for wave soldering on the first circuit board 10, the first circuit board 10 can solder multiple electronic devices 14 using the wave soldering process. This allows for one-time soldering without the need for multiple adjustments to height, reducing soldering time and improving the production efficiency of the first circuit board 10. Similarly, "electronic devices 24 with essentially the same height" refers to multiple electronic devices 24 with height differences within a certain range to accommodate wave soldering. By placing multiple electronic devices 24 with height differences suitable for wave soldering on the second circuit board 20, soldering time can be reduced, and the production efficiency of the second circuit board 20 can be improved.

[0042] Furthermore, by placing all the taller electronic components 14 on the first circuit board 10 and all the shorter electronic components 24 on the second circuit board 20, the taller electronic components 14 are placed closer to the mounting surface 202. Compared to placing the taller electronic components 14 on the second circuit board 20, this method can make full use of the distance between the first circuit board 10 and the second circuit board 20, offset the space occupied by the electronic components 14, reduce the maximum height of the taller electronic components 14 relative to the mounting surface 202, thereby reducing the space occupied by the first circuit board 10 and the second circuit board 20, and thus improving space utilization.

[0043] In some embodiments, such as Figure 3 , Figure 5 and Figure 6 As shown, terminal 11 includes a body 112 and a bracket 113. The body 112 is used to insert an external plug. The bracket 113 is sleeved on and fixed to the body 112 to protect the body 112. The bracket 113 is fixed to the first circuit board 10, and the support rib 111 is located in the bracket 113, thereby providing support for the second circuit board 20 without affecting the body 112 of terminal 11.

[0044] In some embodiments, such as Figure 3 , Figure 5 and Figure 6As shown, the bracket 113 includes a housing 1131 and a connecting ear 1132. The housing 1131 is fitted onto the main body 112, and the connecting ear 1132 is fixedly connected to the housing 1131. The connecting ear 1132 is used to fix the terminal 11 to the mounting surface 202, so that the terminal 11 is fixed to the mounting surface 202. The first circuit board 10 is provided with a bracket hole 15, and the main body 112 passes through the bracket hole 15, so that a part of the terminal 11 is located on the side of the first circuit board 10 facing the mounting surface 202 to insert an external plug, and the other part is located on the side of the first circuit board 10 away from the mounting surface 202 to support the second circuit board 20.

[0045] Optionally, there are two connecting ears 1132, which are respectively located on opposite sides of the housing 1131. The connecting ears 1132 are provided with flanges 1133, and the housing 1131 is provided with buckles 1134. The flanges 1133 are located on the side of the first circuit board 10 facing the second circuit board 20, and the buckles 1134 are located on the side of the first circuit board 10 facing the mounting surface 202. That is, the buckles 1134 and the flanges 1133 are respectively located on both sides of the first circuit board 10 and clamp the first circuit board 10, thereby fixing the bracket 113 and the first circuit board 10.

[0046] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the first circuit board 10 has a plurality of first through holes 16 in the area outside the first overlap area 12. Each first through hole 16 is aligned with the mounting hole 204 of the mounting surface 202 and a screw 300 is inserted to fix the first circuit board 10 and the mounting surface 202, thereby improving the stability of the first circuit board 10.

[0047] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the second circuit board 20 has a plurality of second through holes 25 in the area outside the second overlap area 21. Each second through hole 25 is aligned with the mounting hole 204 of the mounting surface 202 and a screw 300 is inserted to fix the second circuit board 20 and the mounting surface 202, thereby improving the stability of the second circuit board 20.

[0048] In some embodiments, such as Figure 3 and Figure 6 As shown, the connecting ear 1132 is provided with a third through hole 1135. The third through hole 1135 is aligned with the mounting hole 204 of the mounting surface 202 and a screw 300 is inserted to fix the terminal 11 and the mounting surface 202.

[0049] In some embodiments, such as Figure 3 and Figure 7As shown, a rib 203 is provided on the side of the mounting surface 202 facing the first circuit board 10. The rib 203 is used to support the side of the first circuit board 10 facing the mounting surface 202 to improve the stability of the first circuit board 10.

[0050] In some embodiments, such as Figure 3 and Figure 7 As shown, a positioning post 205 is provided on the side of the mounting surface 202 facing the first circuit board 10, and the first circuit board 10 is provided with a positioning hole 17. The positioning post 205 is used to insert into the positioning hole 17 to position the first circuit board 10 and the mounting surface 202. After positioning, the first through hole 16 of the first circuit board 10 and the third through hole 1135 of the connecting ear 1132 are respectively aligned with the mounting hole 204 of their respective mounting surfaces 202 so as to install the screw 300 and improve the installation efficiency of the first circuit board 10.

[0051] In some embodiments, such as Figure 3 , Figure 5 and Figure 7 As shown, the housing 201 has an exposure hole 2021 on the mounting surface 202 for exposing the terminal 11 so that the terminal 11 can be plugged into the plug of an external device. Optionally, the second circuit board 20 has a terminal 26 for plugging into the plug of an external device, and the terminal 26 is exposed on the mounting surface 202 through another exposure hole 2021.

[0052] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A circuit board assembly for use in an energy storage device, the energy storage device comprising a housing having a mounting surface, characterized in that, The circuit board assembly includes: A first circuit board is disposed on the mounting surface. The first circuit board has terminals fixed to it, the terminals protruding from the side of the first circuit board facing away from the mounting surface, and the side of the terminals facing away from the mounting surface is provided with supporting ribs. A second circuit board is disposed on the mounting surface, and a portion of the second circuit board is located on the side of the first circuit board facing away from the housing; Along a direction perpendicular to the mounting surface, the portion of the first circuit board covered by the projection of the second circuit board is a first overlapping area, and the portion of the second circuit board covered by the projection of the first circuit board is a second overlapping area. At least a portion of the support rib is located within the first overlapping area and supports the second overlapping area.

2. The circuit board assembly as described in claim 1, characterized in that: The support rib extends away from the mounting surface in a direction perpendicular to the mounting surface and overlaps the edge of the second circuit board.

3. The circuit board assembly as described in claim 2, characterized in that: There are multiple support ribs, which are spaced apart at the terminals and all of them support the edge of the second circuit board.

4. The circuit board assembly as described in claim 1, characterized in that: The first overlapping area is provided with a clearance hole, and the second circuit board is provided with an electrical connector, at least a portion of which is located within the second overlapping area and passes through the clearance hole.

5. The circuit board assembly as claimed in claim 1, characterized in that: The second circuit board has a clearance groove in the second overlapping area, the clearance groove is for the terminal to pass through, and protrudes from the side of the second circuit board away from the mounting surface.

6. The circuit board assembly as claimed in claim 1, characterized in that: The first circuit board has multiple electronic devices of substantially the same height on the side facing away from the mounting surface and outside the first overlapping area. The second circuit board also has multiple electronic devices of substantially the same height on the side facing away from the mounting surface and outside the second overlapping area. The height of the electronic devices on the first circuit board is greater than the height of the electronic devices on the second circuit board.

7. The circuit board assembly as described in any one of claims 1 to 6, characterized in that: The terminal includes a body and a bracket. The bracket is sleeved on the body and fixed to the body. The bracket is fixed to the first circuit board. The supporting rib is located on the bracket.

8. The circuit board assembly as claimed in claim 7, characterized in that: The bracket includes a housing and a connecting ear. The housing is fitted onto the main body, and the connecting ear is fixedly connected to the housing and fixed to the mounting surface. The first circuit board has a bracket hole, and the main body passes through the bracket hole.

9. An energy storage device, characterized in that: The energy storage device includes a housing and a circuit board assembly as described in any one of claims 1 to 8, wherein the housing has a mounting surface, and the first circuit board and the second circuit board of the circuit board assembly are disposed on the mounting surface.

10. The energy storage device as described in claim 9, characterized in that: The mounting surface facing the first circuit board has a raised rib, which supports the first circuit board.

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