Circuit board assembly and energy storage apparatus

Abstract

Disclosed in the present application are a circuit board assembly and an energy storage apparatus. The circuit board assembly comprises a housing assembly, wherein the housing assembly comprises a first housing and a second housing which are separately arranged in a first direction. The first housing comprises two first side walls which are arranged opposite each other in a second direction; each first side wall is provided with a first snap-fitting slot, the first snap-fitting slots penetrating same in the second direction; the first snap-fitting slot has a first slot wall and a second groove wall which are arranged opposite each other in a third direction; the first slot wall is provided with a limiting protrusion extending in a direction close to the second slot wall; and the limiting protrusion and the second slot wall are arranged spaced apart to form a slot opening. The second housing comprises two second side walls which are arranged opposite each other in the second direction; each second side wall is provided with a snap-fitting portion protruding therefrom and extending to the interior of the second housing; the snap-fitting portion is inserted into the first snap-fitting slot from the slot opening; and the snap-fitting portion is snap-fitted to the limiting protrusion.

Description

Circuit board assemblies and energy storage devices

[0001] Related cross-references

[0002] This application claims priority to Chinese Patent Application No. 2024227914509, filed on November 15, 2024, entitled “Circuit Board Assembly and Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of energy storage technology, and in particular to a circuit board assembly and an energy storage device. Background Technology

[0004] As an important component of energy storage devices, circuit board assemblies are mainly used to convert the internal current of energy storage devices between direct current and alternating current, such as converting the direct current output by the battery assembly into alternating current so that the energy storage device can be used outdoors.

[0005] In related technologies, circuit board assemblies include a housing and a circuit board disposed inside the housing. In order to facilitate the assembly of the circuit board inside the housing, the housing is generally set up in a split manner and fixed with screws. At the same time, in order to improve the stability of the split housing connection, a large number of screws are used, which makes the housing installation process cumbersome and the assembly efficiency low. Summary of the Invention

[0006] This application discloses a circuit board assembly and an energy storage device, which can simplify the installation process of the housing assembly of the circuit board assembly and improve the assembly efficiency of the housing assembly.

[0007] To achieve the above objectives, in a first aspect, embodiments of this application disclose a circuit board assembly having a first direction, a second direction, and a third direction that are mutually perpendicular to each other, the circuit board assembly comprising:

[0008] A housing assembly comprising a first housing and a second housing separately disposed along the first direction, the first housing being connected to the second housing and forming an accommodating space between them; and,

[0009] A circuit board disposed in the receiving space;

[0010] The first housing includes two first sidewalls disposed opposite each other in the second direction. Each first sidewall is provided with a first snap-fit ​​groove extending in the second direction. The first snap-fit ​​groove has a first groove wall and a second groove wall disposed opposite each other in the third direction. The first groove wall is provided with a limiting protrusion extending in a direction close to the second groove wall. The limiting protrusion is spaced apart from the second groove wall to form a groove, and the limiting protrusion is spaced apart from the bottom wall of the first snap-fit ​​groove in the first direction. The second housing includes two second sidewalls disposed opposite each other in the second direction. The two first sidewalls are located between the two second sidewalls. Each second sidewall is provided with a snap-fit ​​portion extending into the interior of the second housing. One snap-fit ​​portion is inserted into a first snap-fit ​​groove from a groove, and the snap-fit ​​portion is engaged with a limiting protrusion.

[0011] Compared with the prior art, the beneficial effects of this application are:

[0012] This application provides a circuit board assembly and an energy storage device. The circuit board assembly includes a housing assembly and a circuit board. The housing assembly includes a first housing and a second housing, which are separately disposed along a first direction. When assembling the first and second housings, snap-fit ​​portions on the two second sidewalls can be inserted from slots into the first snap-fit ​​groove. Pushing the second housing causes the snap-fit ​​portions to move along a third direction until they engage between a limiting protrusion and the bottom wall of the first snap-fit ​​groove, thereby preventing the limiting protrusion from detaching the second housing from the first housing along the first direction. Thus, during the installation of the first and second housings, each snap-fit ​​portion on the two second sidewalls can be aligned one-to-one with the slot of the first snap-fit ​​groove on the first sidewall. After the snap-fit ​​portion enters the first snap-fit ​​groove, pushing the second housing along a third direction can simultaneously achieve the connection of each snap-fit ​​portion. This simplifies the installation process of the housing assembly and improves the assembly efficiency of the housing assembly. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a schematic diagram of the circuit board assembly disclosed in this application from one angle;

[0015] Figure 2 is a cross-sectional view along the AA direction in Figure 1;

[0016] Figure 3 is a schematic diagram of the structure of the first shell disclosed in this application;

[0017] Figure 4 is a schematic diagram of the structure of the second shell disclosed in this application;

[0018] Figure 5 is a schematic diagram of the circuit board assembly disclosed in this application from another angle;

[0019] Figure 6 is a cross-sectional view along the BB direction in Figure 5;

[0020] Figure 7 is a cross-sectional view along the CC direction in Figure 5;

[0021] Figure 8 is a schematic diagram of the circuit board assembly disclosed in this application from another angle;

[0022] Figure 9 is an exploded view of the circuit board assembly disclosed in this application;

[0023] Figure 10 is an exploded structural diagram of the first housing, the first insulating layer, the second housing, and the second insulating layer disclosed in this application.

[0024] Figure 11 is a schematic diagram of the connection between the first housing and the first insulating layer disclosed in this application;

[0025] Figure 12 is a schematic diagram of the connection between the second housing and the second insulating layer disclosed in this application;

[0026] Figure 13 is a schematic diagram of the exploded structure of the energy storage device disclosed in this application.

[0027] Explanation of reference numerals in the attached drawings: 100, circuit board assembly; 10, housing assembly; 101, receiving space; 11, first housing; 110, second opening; 11a, third through hole; 111, first side wall; 111a, second threaded hole; 1111, first snap-fit ​​groove; 1111a, first groove wall; 1111b, second groove wall; 1111c, limiting protrusion; 1111d, groove opening; 1111e, groove bottom wall; 112, third side wall; 1121, first bend; 1121a, first threaded hole; 1121b, first notch; 113, inner bottom surface; 113a, connecting post; 12, second housing; 120, first opening; 12a, first through hole; 12b, second notch; 121, second side wall; 1 211, Snap-fit ​​part; 1211a, First part; 1211b, Second part; 1212, Second snap-fit ​​groove; 1212a, Third groove wall; 1212b, Fourth groove wall; 122, Fourth side wall; 122a, Third notch; 1221, Second bend; 1221a, Second through hole; 20, Circuit board; 201, Electrical terminal; 202, Third threaded hole; 30, First insulating layer; 30a, First side; 30b, Second side; 30c, Third side; 40, Second insulating layer; 40a, Fourth side; 40b, Fifth side; 200, Energy storage device; 210, Energy storage housing; 220, Battery assembly; Z, First direction; Y, Second direction; X, Third direction. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In this application, the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "installation," "setup," "equipped with," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0033] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0034] Please refer to Figures 1 and 2. This application discloses a circuit board assembly 100. The circuit board assembly 100 may have a first direction Z, a second direction Y and a third direction X that are perpendicular to each other. The circuit board assembly 100 includes a housing assembly 10 and a circuit board 20. The housing assembly 10 includes a first housing 11 and a second housing 12 that are separately arranged along the first direction Z. The first housing 11 and the second housing 12 are connected and form a receiving space 101 between them. The circuit board 20 is disposed in the receiving space 101.

[0035] Referring to Figures 3 and 4, the first housing 11 may include two first sidewalls 111 disposed opposite each other in the second direction Y. Each first sidewall 111 is provided with a first engaging groove 1111 extending in the second direction Y. The first engaging groove 1111 has a first groove wall 1111a and a second groove wall 1111b disposed opposite each other in the third direction X. The first groove wall 1111a is provided with a limiting protrusion 1111c extending in a direction close to the second groove wall 1111b. The limiting protrusion 1111c and the second groove wall 1111b are spaced apart to form a slot 111. 1d, and the limiting protrusion 1111c and the first snap-fit ​​groove 1111 are spaced apart from the bottom wall 1111e of the groove in the first direction Z. The second housing 12 includes two second side walls 121 that are arranged opposite to each other in the second direction Y. The two first side walls 111 are located between the two second side walls 121. Each second side wall 121 is provided with a snap-fit ​​part 1211 located inside the second housing 12. A snap-fit ​​part 1211 is inserted into a first snap-fit ​​groove 1111 from a slot 1111d, and a snap-fit ​​part 1211 is engaged with a limiting protrusion 1111c.

[0036] The circuit board assembly 100 of this application provides a first snap-fit ​​groove 1111 on the first sidewall 111 of the first housing 11 and a limiting protrusion 1111c on the first groove wall 1111a of the first snap-fit ​​groove 1111, such that a slot 1111d is formed between the limiting protrusion 1111c and the second groove wall 1111b. When the second housing 12 is assembled onto the first housing 11, the snap-fit ​​portion 1211 on the second sidewall 121 of the second housing 12 can be inserted into the first snap-fit ​​groove 1111 from the slot 1111d. Pushing the second housing 12 can cause the snap-fit ​​portion 1211 to move along the third direction X until the snap-fit ​​portion 1211 engages between the limiting protrusion 1111c and the bottom wall 1111e of the first snap-fit ​​groove 1111, thereby allowing the limiting protrusion 1111c to restrict the second housing 12 from disengaging from the first housing 11 along the first direction Z. Thus, during the installation of the first housing 11 and the second housing 12, each snap-fit ​​portion 1211 on the two second sidewalls 121 can be matched one-to-one with the slot 1111d of the first snap-fit ​​groove 1111 on the first sidewall 111. After the snap-fit ​​portion 1211 enters the first snap-fit ​​groove 1111, pushing the second housing 12 along the third direction X can simultaneously realize the connection of each snap-fit ​​portion 1211. This simplifies the installation process of the housing assembly 10 and improves the assembly efficiency of the housing assembly 10.

[0037] It should be noted that the circuit board 20, located in the accommodating space 101 of the housing assembly 10, can house inverters and other devices that generate high heat. To make efficient use of the internal space of the housing assembly 10, the spatial layout of each component is relatively compact. Therefore, the circuit board assembly 100 typically involves heat dissipation issues. In related technologies, heat dissipation can be achieved by additionally installing a fan or heat sink. In the embodiments of this application, in addition to the above-mentioned methods, the first housing 11 can also have a connecting post 113a extending along the first direction Z protruding from its inner bottom surface 113. One end of the connecting post 113a facing away from the inner bottom surface 113 is connected to the circuit board 20, creating a gap between the circuit board 20 and the inner bottom surface 113. This allows for heat dissipation of the circuit board 20 by utilizing the gap between it and the inner bottom surface 113 of the first housing 11, while avoiding large-area contact between the circuit board 20 and the inner bottom surface 113 of the first housing 11, thus reducing the risk of short circuits.

[0038] To improve the secure engagement of the snap-fit ​​portion 1211 in the first snap-fit ​​groove 1111, in some possible embodiments, referring to Figures 4 to 7, the snap-fit ​​portion 1211 may include a first portion 1211a and a second portion 1211b connected at an angle. The first portion 1211a protrudes from the second sidewall 121 and extends into the interior of the second housing 12, while the second portion 1211b extends in the third direction X. The first portion 1211a is engaged between the limiting protrusion 1111c and the bottom wall 1111e of the groove, and the second portion 1211b is located inside the first housing 11 and is engaged with the first sidewall 111. By configuring the snap-fit ​​portion 1211 into two parts, the first part 1211a is snapped between the limiting protrusion 1111c and the bottom wall 1111e of the groove to restrict the position of the second housing 12 in the first direction Z, and the second part 1211b is snapped with the first side wall 111 to restrict the position of the second housing 12 in the second direction Y. This improves the reliability of the snap-fit ​​portion 1211 and the first snap-fit ​​groove 1111, thereby enhancing the stability of the connection between the second housing 12 and the first housing 11.

[0039] It is understood that the first part 1211a can extend into the second housing 12 along the second direction Y, and the second part 1211b extends from the connection point with the first part 1211a along the third direction X. Referring to Figures 5 and 6, the connection configuration of the snap-fit ​​part 1211 and the first snap-fit ​​groove 1111 can be seen. After the second housing 12 and the first housing 11 are assembled, the first part 1211a is located between the limiting protrusion 1111c and the bottom wall 1111e of the first snap-fit ​​groove 1111. At this time, the first part 1211a can abut against the limiting protrusion 1111c in the first direction Z, and can also abut against the first groove wall 1111a in the third direction X, while the second part 1211b can abut against the inner surface of the first side wall 111. In this way, the reliability of the connection between the snap-fit ​​part 1211 and the first snap-fit ​​groove 1111 can be improved.

[0040] Since the two second sidewalls 121 of the second housing 12 respectively cover the outer sides of the two first sidewalls 111, the snap-fit ​​portion 1211 is disposed on the second sidewall 121 and located inside the second housing 12. In order to enable the first part 1211a of the snap-fit ​​portion 1211 to be accurately aligned with the slot 1111d, in some possible embodiments, each second sidewall 121 is provided with a second snap-fit ​​groove 1212 that extends through in the second direction Y. The second snap-fit ​​groove 1212 has a third groove wall 1212a and a fourth groove wall 1212b that are disposed opposite to each other in the third direction X. The first part 1211a is protruding on the third groove wall 1212a, and the second part 1211b extends in the direction close to the fourth groove wall 1212b along the third direction X.

[0041] By forming a second snap-fit ​​groove 1212 on the second sidewall 121 and setting the snap-fit ​​part 1211 on the third groove wall 1212a of the second snap-fit ​​groove 1212, the setting position of the snap-fit ​​part 1211 can be visualized. When assembling the second housing 12 to the first housing 11, the assembly position of the snap-fit ​​part 1211 can be determined through the second snap-fit ​​groove 1212, so that the snap-fit ​​part 1211 can be accurately positioned to the groove 1111d and then snap-fitted into the second snap-fit ​​groove 1212, thereby reducing assembly errors and improving assembly efficiency.

[0042] It is understood that after the second housing 12 and the first housing 11 are assembled, the first groove wall 1111a and the third groove wall 1212a with the limiting protrusion 1111c are arranged opposite each other in the second direction Y.

[0043] In some possible implementations, the housing assembly 10 has a cuboid structure, with the first direction Z being the height direction of the housing assembly 10, the second direction Y being the width direction of the housing assembly 10, and the third direction X being the length direction of the housing assembly 10.

[0044] Each first sidewall 111 is provided with a plurality of first snap-fit ​​slots 1111 arranged at intervals along the third direction X, and each second sidewall 121 is provided with a plurality of snap-fit ​​parts 1211 arranged at intervals along the third direction X. The plurality of snap-fit ​​parts 1211 are inserted into the plurality of first snap-fit ​​slots 1111 in a one-to-one correspondence. By providing a plurality of first snap-fit ​​slots 1111 on each first sidewall 111 and a plurality of snap-fit ​​parts 1211 on each second sidewall 121, and by making the plurality of snap-fit ​​parts 1211 inserted into the plurality of first snap-fit ​​slots 1111 in a one-to-one correspondence, the firmness of the connection between the first housing 11 and the second housing 12 can be improved. Furthermore, the plurality of snap-fit ​​parts 1211 can be simultaneously aligned with the first snap-fit ​​slots 1111. After alignment, pushing the second housing 12 can simultaneously achieve the mating connection of multiple positions, achieving one-step assembly, simplifying the assembly process, and improving assembly efficiency.

[0045] Of course, in other embodiments, the housing assembly 10 may be a cube or other irregular structure, as long as the first direction Z, the second direction Y and the third direction X are mutually perpendicular.

[0046] To achieve the sealing of the housing assembly 10 and further improve the stability of the connection between the first housing 11 and the second housing 12, referring to FIG3, optionally, the first housing 11 may also include a third sidewall 112 disposed in the third direction X. The third sidewall 112 is connected between the two first sidewalls 111. The third sidewall 112 has a first bend portion 1121 that bends toward the interior of the housing assembly 10. The first bend portion 1121 has a first threaded hole 1121a that extends along the first direction Z. The second housing 12 has a first through hole 12a that extends along the first direction Z. The circuit board assembly 100 also includes a first fastener (not shown), which passes through the first through hole 12a and is screwed into the first threaded hole 1121a. By extending a first bend 1121 from the third sidewall 112 to provide a first threaded hole 1121a and providing a first through hole 12a on the second housing 12 for the first fastener to pass through, the screw connection between the first housing 11 and the second housing 12 can be achieved. Based on the connection between the first housing 11 and the second housing 12 through the engagement of the snap-fit ​​part 1211 and the first snap-fit ​​groove 1111, the firmness of the connection between the two housings can be further improved.

[0047] It is understood that the first fastener is sequentially inserted into the first through hole 12a and the first threaded hole 1121a along the first direction Z, which can effectively constrain the first housing 11 and the second housing 12 in the second direction Y.

[0048] Optionally, the first fastener may be, but is not limited to, bolts, screws, etc., as long as it can effectively fix the first housing 11 and the second housing 12. The specific form is not specifically limited in the embodiments of this application.

[0049] Referring again to Figures 3 and 4, in some possible embodiments, the first bend 1121 may have a first notch 1121b, and the second housing 12 may have a second notch 12b. The second notch 12b communicates with the first notch 1121b, and the first notch 1121b and the second notch 12b are used for wires electrically connected to the circuit board 20 to pass through. That is, after the second housing 12 and the first housing 11 are assembled, the second housing 12 and the first bend 1121 are stacked in the first direction, so that the first notch 1121b and the second notch 12b communicate and communicate with the receiving space 101 of the housing assembly 10, so that the first notch 1121b and the second notch 12b can be used together for wires electrically connected to the circuit board 20 to pass through, so as to facilitate the laying and fixing of the wires.

[0050] Optionally, the number of first notches 1121b provided on the first bent portion 1121 can be one, two, three, etc., with each first notch 1121b spaced apart. Correspondingly, the second notches 12b on the second housing 12 can be provided in a one-to-one correspondence with the first notches 1121b. Correspondingly, the number of first threaded holes 1121a can also be multiple, with each first threaded hole 1121a provided on the first bent portion 1121 between two adjacent first notches 1121b, thereby making the positions of the first fasteners evenly distributed.

[0051] In some possible embodiments, the second housing 12 has a fourth sidewall 122 at one end in the third direction X, the fourth sidewall 122 is connected between the two second sidewalls 121, and the other end of the second housing 12 in the third direction X forms a first opening 120 located between the two second sidewalls 121, and the fourth sidewall 122 abuts against the outer surface of the first housing 11.

[0052] It is understandable that, in order to enable the snap-fit ​​portion 1211 of the second housing 12 to snap into the first snap-fit ​​groove 1111, the other end of the second housing 12 in the third direction X is formed with a first opening 120 located on the two second sidewalls 121. Since the second housing 12 and the first housing 11 are misaligned in the third direction X when the snap-fit ​​portion 1211 is inserted into the groove 1111d, by forming the first opening 120 at one end of the second housing 12 in the third direction X, the snap-fit ​​portion 1211 on the second housing 12 can be aligned and inserted into the groove 1111d first, and then the snap-fit ​​portion 1211 is allowed to move in the first snap-fit ​​groove 1111 along the third direction X until it abuts against the limiting protrusion 1111c, that is, the second housing 1211 can be pushed. The body 12 moves along the third direction X. At this time, the locking part 1211 moves together with the second housing 12 until the first part 1211a of the locking part 1211 moves between the limiting protrusion 1111c and the first locking groove 1111, and the first part 1211a can abut against the limiting protrusion 1111c in the first direction Z. The first part 1211a can abut against the first groove wall 1111a in the third direction X. The second part 1211b abuts against the inner surface of the first side wall 111.

[0053] Furthermore, the fourth sidewall 122, which abuts against the first housing 11 and cannot be pushed further, ensures that the snap-fit ​​portion 1211 of the second housing 12 is snapped into place with the first snap-fit ​​groove 1111, and that the end of the second housing 12 is aligned with the end of the first housing, thereby ensuring the assembly accuracy between the second housing 12 and the first housing 11 and achieving an effective connection between the second housing 12 and the first housing 11.

[0054] Since one end of the housing assembly 10 in the third direction X is closed through the third sidewall 112 of the first housing 11, for the electrical connection of the circuit board 20, referring to FIG8, in some possible embodiments, the circuit board 20 is provided with a power terminal 201, the first housing 11 is provided with a second opening 110 at one end corresponding to the fourth sidewall 122, the fourth sidewall is provided with a third notch 122a to expose the power terminal 201, the fourth sidewall 122 is provided with a second bend 1221 on both sides in the second direction Y, the two first sidewalls 111 are located between the second bends 1221, each second bend 1221 is provided with a second through hole 1221a extending in the second direction Y, and each first sidewall 111 is provided with a second threaded hole 111a extending in the second direction Y. The circuit board assembly 100 also includes a second fastener (not shown), the second fastener passes through the second through hole 1221a and is screwed into the second threaded hole 111a.

[0055] For example, the second fastener is sequentially inserted into the second through hole 1221a and the second threaded hole 111a along the second direction Y, which can effectively constrain the first housing 11 and the second housing 12 in the first direction Z and the third direction X.

[0056] It is understood that the fourth sidewall 122 does not completely close the second opening 110. By providing a second opening 110 at one end of the first housing 11 corresponding to the fourth sidewall 122, which is formed between the two first sidewalls 111, and providing a third notch 122a on the fourth sidewall 122 to expose the electrical terminal 201, the electrical connection of the circuit board 20 can be realized. In addition, by providing second bending portions 1221 on both sides of the fourth sidewall 122 along the second direction Y to cover the outside of the first sidewall 111, and providing a second through hole 1221a on the second bending portion 1221, and providing a second threaded hole 111a on the first sidewall 111, and using a second fastener to pass through the second through hole 1221a and connect to the second threaded hole 111a, the connection between the second housing 12 and the first housing 11 is further realized. Based on the connection between the first housing 11 and the second housing 12 through the engagement of the snap-fit ​​portion 1211 and the first snap-fit ​​groove 1111 and the connection through the first fastener, the reliability of the connection between the first housing 11 and the second housing 12 can be further improved.

[0057] Optionally, the second fastener may be, but is not limited to, bolts, screws, etc., as long as it can effectively fix the first housing 11 and the second housing 12. The specific form is not specifically limited in the embodiments of this application.

[0058] It is understood that the third notch 122a on the fourth sidewall 122 can communicate with the second opening 110, so that the power terminal 201 can at least partially extend to the third notch 122a. In this way, the power terminal 201 can have sufficient installation space, and the fourth sidewall 122 can have sufficient extension length to achieve the sealing of the housing assembly 10.

[0059] Optionally, the first housing 11 is provided with a third through hole 11a (see Figure 9), and the circuit board 20 is provided with a third threaded hole 202. The circuit board assembly 100 also includes a third fastener (not shown), which passes through the third through hole 11a and is screwed into the third threaded hole 202. Based on the circuit board 20 being spaced apart from the first housing 11 by the connecting post, the circuit board 20 is fixed by using the third fastener passing through the third through hole 11a and the third threaded hole 202. The third fastener can be, but is not limited to, bolts, screws, etc., as long as it can effectively fix the first housing 11 and the second housing 12. The specific form is not specifically limited in this embodiment.

[0060] Optionally, the number of third threaded holes 202 can be multiple, such as three, four, five, etc., as long as they can provide a stable connection to the circuit board 20. The specific number is not specifically limited in this embodiment.

[0061] It is understood that the split housing assembly 10 provided in this application may include two connection methods, using both snap-fit ​​and fastener connection to achieve the connection between the first housing 11 and the second housing 12. Specifically, on both sides of the housing assembly 10 along the second direction Y (width direction), snap-fit ​​parts 1211 are inserted into the first snap-fit ​​grooves 1111, and the limiting protrusions 1111c are used for limiting. At both ends of the housing assembly 10 along the third direction Y (length direction), fasteners are used to fix the first housing 11 and the second housing 12. Thus, by using both snap-fit ​​and locking connection methods, compared to the method of using fasteners for locking connection between the first housing 11 and the second housing 12, the number of fasteners can be reduced, thereby simplifying the installation process of the first housing 11 and the second housing 12, and improving the assembly efficiency of the housing assembly 10.

[0062] Since the first housing 11 and the second housing 12 of the circuit board assembly 100 are typically made of metal, in order to reduce the possibility of internal short circuits, in some possible embodiments, referring to Figures 9 to 12, a first insulating layer 30 is provided on the inner surface of the first housing 11, and / or a second insulating layer 40 is provided on the inner surface of the second housing 12. By providing insulating layers on the inner surfaces of the first housing 11 and / or the second housing 12, the circuit board 20 and the housing assembly 10 can be electrostatically isolated, thereby reducing the risk of internal short circuits.

[0063] Optionally, the inner surfaces of the first housing 11 and the second housing 12 are respectively provided with a first insulating layer 30 and a second insulating layer 40, so that both the first housing 11 and the second housing 12 have a certain insulating effect.

[0064] Optionally, referring to Figures 10 and 11, the first insulating layer 30 has a first side 30a, a second side 30b, and a third side 30c. The first insulating layer 30 may be disposed only on the inner bottom surface 113 of the first housing 11 (facing the bottom surface of the second housing 12 in the first direction Z), and the first side 30a may be located at the edge of the first insulating layer 30 in the third direction X, connected to the third sidewall 112. The second side 30b can be located at the edge of the first insulating layer 30 in the second direction Y and connected to the first side 30a. The second side 30b can be attached to the first sidewall 111. The third side 30c can be located at the edge of the first insulating layer 30 opposite to the first side 30a and bends outward toward the outside of the first housing 11. The third side 30c can be parallel to the inner bottom surface 113 of the first housing 11 and cover the outer surface of the first housing 11 opposite to the inner bottom surface 113. That is, the first insulating layer 30 located on the inner bottom surface 113 of the first housing 11 can extend to the outer surface. Since a wire will pass through the end where the third side 30c is located and be electrically connected to the outside, this arrangement can improve the insulation effect, thereby helping to improve the insulation performance of the housing assembly 10.

[0065] It is understood that the first sidewall 111 of the first housing 11 may be provided with a heat dissipation vent, and the first insulating layer 30 provided on the first sidewall 111 needs to make way for it.

[0066] Of course, in some other embodiments, the first insulating layer 30 may also have other structures. For example, the first insulating layer 30 located on the first sidewall 111 may extend from the inside to the outside. The specific structure can be adjusted according to actual conditions and is not specifically limited in the embodiments of this application.

[0067] Optionally, referring to Figures 10 and 12, the second insulating layer 40 has a fourth side 40a and a fifth side 40b. The fourth side 40a is located at the edge of the second insulating layer 40 in the third direction X, and the fifth side 40b is connected to the fourth side 40a and extends from the connection point in the third direction X away from the first housing 11 to form a gap with the fourth side 40a (not shown). The second insulating layer 40 is disposed on the inner bottom surface 113 of the second housing 12 (facing the bottom surface of the first housing 11 in the first direction Z). The fourth side 40a is located on the inner surface of the fourth sidewall 122, and the fifth side 40b is located on the inner surface of the fourth sidewall 122. That is, the second insulating layer 40 on the fourth sidewall 122 extends from the inside to the outside, covering the fourth sidewall 122.

[0068] It is understood that a third notch 122a is provided on the fourth side wall 122 for the extension of the electrical terminal 201. Therefore, the third notch 122a needs to be avoided when the second insulating layer 40 is installed.

[0069] Of course, in some other embodiments, the second insulating layer 40 may also have other structures. For example, the second insulating layer 40 may also extend to the second sidewall 121. The specific structure can be adjusted according to actual conditions, and is not specifically limited in the embodiments of this application.

[0070] The arrangement of the first insulating layer 30 and the second insulating layer 40 enables electrostatic isolation between the circuit board 20 and the first housing 11 and the second housing 12, thereby reducing the possibility of internal short circuits. Furthermore, since the terminals on the circuit board 20 are located at one end of the fourth sidewall 122, extending the second insulating layer 40 from the inner surface to the outer surface of the fourth sidewall 122 further reduces the risk of end short circuits in the circuit board 20, thereby improving the insulation effect of the circuit board assembly 100.

[0071] Optionally, the insulating layer can be polyester film, insulating coating, ceramic material, silicone rubber, etc., which can meet the electrical isolation between the circuit and the circuit board 20 and prevent direct contact of current from causing short circuit or leakage. No specific limitation is made in the embodiments of this application.

[0072] This application also discloses an energy storage device 200. Referring to FIG13, the energy storage device 200 may include an energy storage housing 210, a battery assembly 220, and a circuit board assembly 100 as described in the above embodiments. Both the battery assembly 220 and the circuit board assembly 100 are disposed within the energy storage housing 210, and the circuit board assembly 100 is connected to the battery assembly 220.

[0073] It is understood that the energy storage device 200 having the aforementioned circuit board assembly 100 also possesses all the technical effects of the aforementioned circuit board assembly 100. Since the aforementioned technical effects have been described in detail in the embodiments of the circuit board assembly 100, they will not be repeated here.

[0074] The circuit board assembly and energy storage device disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the circuit board assembly and energy storage device of this application and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A circuit board assembly, characterized by The circuit board assembly (100) has a first direction (Z), a second direction (Y), and a third direction (X) that are mutually perpendicular to each other. The circuit board assembly (100) includes: A housing assembly (10) comprising a first housing (11) and a second housing (12) separately disposed along the first direction (Z), the first housing (11) and the second housing (12) being connected and forming a receiving space (101) therebetween; and, Circuit board (20), said circuit board (20) is disposed in said receiving space (101); The first housing (11) includes two first sidewalls (111) disposed opposite each other in the second direction (Y). Each first sidewall (111) is provided with a first snap-fit ​​groove (1111) extending through the second direction (Y). The first snap-fit ​​groove (1111) has a first groove wall (1111a) and a second groove wall (1111b) disposed opposite each other in the third direction (X). The first groove wall (1111a) is provided with a limiting protrusion (1111c) extending in a direction close to the second groove wall (1111b). The limiting protrusion (1111c) and the second groove wall (1111b) are spaced apart to form a groove. The first housing (12) includes two second sidewalls (121) arranged opposite to each other in the second direction (Y). Each second sidewall (121) is provided with a snap-fit ​​portion (1211) extending into the interior of the second housing (12). One of the snap-fit ​​portions (1211) is inserted into the first snap-fit ​​groove (1111) from one of the slots (1111d), and one of the snap-fit ​​portions (1211) is engaged with one of the limiting protrusions (1111c).

2. The circuit board assembly of claim 1, wherein, The snap-fit ​​portion (1211) includes a first portion (1211a) and a second portion (1211b) connected at an angle. The first portion (1211a) protrudes from the second sidewall (121) and extends into the second housing (12). The second portion (1211b) extends along the third direction (X). The first portion (1211a) is snapped between the limiting protrusion (1111c) and the bottom wall of the groove (1111e). The second portion (1211b) is located inside the first housing (11) and is snapped to the first sidewall (111).

3. The circuit board assembly of claim 2, wherein, Each of the second sidewalls (121) is provided with a second snap-fit ​​groove (1212) that extends through the second direction (Y). The second snap-fit ​​groove (1212) has a third groove wall (1212a) and a fourth groove wall (1212b) that are disposed opposite to each other in the third direction (X). The first portion (1211a) is protruding on the third groove wall (1212a), and the second portion (1211b) extends along the third direction (X) toward the fourth groove wall (1212b).

4. The circuit board assembly of claim 1, wherein, The housing assembly (10) has a cuboid structure, the first direction (Z) is the height direction of the housing assembly (10), the second direction (Y) is the width direction of the housing assembly (10), and the third direction (X) is the length direction of the housing assembly (10). Each of the first sidewalls (111) is provided with a plurality of first snap-fit ​​slots (1111) arranged at intervals along the third direction (X), and each of the second sidewalls (121) is provided with a plurality of snap-fit ​​parts (1211) arranged at intervals along the third direction (X). The plurality of snap-fit ​​parts (1211) are inserted into the plurality of first snap-fit ​​slots (1111) one by one.

5. The circuit board assembly of claim 1, wherein, The first housing (11) further includes a third sidewall (112) disposed in the third direction (X), the third sidewall (112) being connected between the two first sidewalls (111), the third sidewall (112) having a first bend (1121) bending toward the interior of the housing assembly (10), the first bend (1121) having a first threaded hole (1121a) penetrating along the first direction (Z), and the second housing (12) having a first through hole (12a) penetrating along the first direction (Z); The circuit board assembly (100) further includes a first fastener that passes through the first through hole (12a) and is screwed into the first threaded hole (1121a).

6. The circuit board assembly of claim 5, wherein, The first bend (1121) has a first notch (1121b), and the second housing (12) has a second notch (12b). The second notch (12b) is connected to the first notch (1121b). The first notch (1121b) and the second notch (12b) are used for wires that are electrically connected to the circuit board (20) to pass through.

7. The circuit board assembly of claim 1, wherein, The second housing (12) has a fourth sidewall (122) at one end in the third direction (X), the fourth sidewall (122) is connected between the two second sidewalls (121), and the fourth sidewall (122) abuts against the outer surface of the first housing (11).

8. The circuit board assembly of claim 7, wherein, The circuit board (20) is provided with a power terminal (201), and the fourth side wall (122) is provided with a third notch (122a) to expose the power terminal (201). The fourth side wall (122) is provided with a second bend (1221) on both sides along the second direction (Y). The two first side walls (111) are located between the second bends (1221). Each second bend (1221) is provided with a second through hole (1221a) extending along the second direction (Y). Each first side wall (111) is provided with a second threaded hole (111a) extending along the second direction (Y). The circuit board assembly (100) further includes a second fastener that passes through the second through hole (1221a) and is screwed into the second threaded hole (111a).

9. The circuit board assembly of any of claims 1-8, wherein, The first housing (11) has a connecting post (113a) extending along the first direction (Z) on its inner bottom surface (113). One end of the connecting post (113a) facing away from the inner bottom surface (113) is connected to the circuit board (20) so that there is a gap between the circuit board (20) and the inner bottom surface (113).

10. The circuit board assembly of any of claims 1-8, wherein, The first housing (11) is provided with a third through hole (11a), the circuit board (20) is provided with a third threaded hole (202), and the circuit board assembly (100) further includes a third fastener, which passes through the third through hole (11a) and is screwed into the third threaded hole (202).

11. The circuit board assembly of any of claims 1-8, wherein, The inner surface of the first housing (11) is provided with a first insulating layer (30), and / or the inner surface of the second housing (12) is provided with a second insulating layer (40).

12. An energy storage device, characterized by, Includes the circuit board assembly (100) as described in any one of claims 1-11.

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