Circuit board assemblies, batteries, and electrical equipment

Abstract

The present invention provides a circuit board assembly including a circuit board, a first housing, a first insulating material, and a first ventilation material. The circuit board includes a first surface and a second surface that are arranged opposite to each other in a first direction. The circuit board further includes an electronic component provided on the first surface. The first housing includes a first recess in which the circuit board is provided, the first recess has a first bottom wall, and the second surface faces the first bottom wall. The first insulating material is provided on the first surface and is provided so as to cover at least a part of the electronic component, and the first insulating material is connected to the first housing to form a first space. The first insulating material and the first space overlap in projection in the first direction. The first ventilation material communicates with the first space and an external space. The present application further provides a battery and an electric device including the circuit board assembly. The first housing, the first insulating material, and the first ventilation material can collectively improve the protective ability of the circuit board assembly.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to circuit board assemblies, batteries, and electrical devices.

Background Art

[0002] The reliability of circuit boards and components of circuit boards plays an important role in batteries and electrical devices. In conventional circuit board protection methods, usually, the components are protected by applying a three-proof (waterproof, moisture-resistant, corrosion-resistant) adhesive on the surface of the components (conformal coating). Since the thickness of the three-proof adhesive is limited, it affects the service life of batteries and electrical devices.

Summary of the Invention

[0003] In view of such a situation, it is necessary to provide a circuit board assembly capable of comprehensively improving the protection ability.

[0004] One embodiment of the present disclosure provides a circuit board assembly including a circuit board, a first housing, a first insulating material, and a first ventilation material. The circuit board includes a first surface and a second surface disposed opposite to each other in a first direction. The circuit board further includes electronic components provided on the first surface. The first housing includes a first recess in which the circuit board is provided. The first recess has a first bottom wall, and the second surface faces the first bottom wall. The first insulating material is provided on the first surface and is provided to cover at least a part of the electronic components. The first insulating material is connected to the first housing to form a first space. The projection of the first insulating material and the first space in the first direction overlaps. The first ventilation material communicates the first space with the external space.

[0005] The first insulating material is provided on the first surface and is provided to cover at least a portion of the electronic components, thereby protecting the electronic components on the first surface. The first insulating material is connected to the first housing to form a first space, protecting the second surface located within the first space. The first ventilator is for balancing the air pressure within the first space with the air pressure in the external space. The first housing, the first insulating material, and the first ventilator together can comprehensively improve the protective capabilities of the circuit board assembly.

[0006] In some embodiments of this application, in the first direction, the height at which the first insulating material is placed on the first surface is greater than 1 mm. This covers the leads on the first surface of the electronic component, preventing the leads of the electronic component from being exposed and thus providing a protective effect.

[0007] In some embodiments of this application, at least a portion of the second surface is located in the first space. This reduces the risk of the second surface being exposed to the external space and damaged, thereby enhancing the protection of the circuit board assembly.

[0008] In some embodiments of this application, the first ventilation material penetrates the circuit board and the first insulating material, connecting the first space with the external space.

[0009] In some embodiments of this application, the first insulating material is formed by pouring an insulating material onto a first surface and allowing it to harden.

[0010] In some embodiments of this application, the first housing includes a first connecting member provided on the first bottom wall, positioned around the circuit board and connected to the circuit board to form a first space, the first connecting member supporting the circuit board and the first insulating material in a first direction. The first insulating material is connected to the first connecting member, overlaps with the projection of the first space in the first direction, and separates the first space from the external space.

[0011] In some embodiments of this application, the circuit board further includes a third surface provided between a first surface and a second surface, and the first connecting member has a first region and a second region at the end away from the first bottom wall, the first region being connected to the second surface and supporting and connecting the circuit board in a first direction, the second region being connected to the third surface and for positioning the circuit board, thereby increasing the stability of the connection between the circuit board and the first housing.

[0012] In some embodiments of this application, a gap is provided between the second region and the third surface, and the first insulating material is filled into this gap. The first insulating material is filled into the gap between the third surface and the second region, which increases the contact area between the first insulating material and the second region, and is advantageous in improving the connection strength between the first insulating material and the second region.

[0013] In some embodiments of this application, a first insulating material is in contact with a second region. During the manufacturing process, the second region is aligned with the first surface to contain a potting agent, reducing the risk of the potting agent overflowing, and forms a first insulating material that is in contact with the second region after the potting agent has cured.

[0014] In some embodiments of this application, the first housing further includes a second connecting member, at least a portion of which is located within a first space, and the circuit board assembly further includes a first fixing member connecting the second connecting member to the circuit board, thereby improving the connection stability between the circuit board and the first housing.

[0015] In some embodiments of this application, the second connecting member is connected to the first bottom wall and extends along the first direction, with one end spaced apart from the first bottom wall in contact with the second surface.

[0016] In some embodiments of this application, the first ventilator has a first opening that communicates with a first space, a second opening that communicates with an external space, and a first passage that connects the first opening and the second opening. When the air pressure in the first space is greater than the air pressure in the external space, gas in the first space enters the first passage through the first opening and is discharged to the external space through the second opening, thereby balancing the air pressure in the first space and the air pressure in the external space.

[0017] In some embodiments of this application, the first ventilation material further comprises a ventilation membrane provided within the first passage. The ventilation membrane allows gas to circulate within the first passage and reduces the risk of foreign matter from the external space entering the first space through the first passage, thereby improving the protective capability of the circuit board assembly.

[0018] In some embodiments of this application, the circuit board assembly further comprises a first connection hole penetrating the circuit board and a second connection hole penetrating a first insulating material, the second connection hole communicating with the first connection hole. The first ventilation material has a first portion and a second portion. At least a portion of the first portion is provided in the first connection hole to improve the stability of the connection between the first ventilation material and the circuit board. At least a portion of the second portion is provided in the second connection hole to improve the stability of the connection between the first ventilation material and the first insulating material.

[0019] In some embodiments of this application, in a first direction, the second portion protrudes above the height of the first insulating material placed on the first surface. This is advantageous in reducing the risk of potting material flowing into the first passage through the second opening and reducing the risk of the ventilation membrane being punctured by foreign matter.

[0020] In some embodiments of this application, the second portion has a first outer surface located outside the first passage toward the first portion, and the first outer surface is in contact with the first surface. This is advantageous in that the second portion is stably supported and fixed to the first surface, thereby improving the connection stability between the first ventilation material and the circuit board.

[0021] In some embodiments of this application, the ventilation membrane is provided in a first portion to improve the stability of the ventilation membrane in the first passage.

[0022] In some embodiments of this application, the first portion has a first inner surface located inside the first passage toward the second portion, and the first inner surface is connected to a ventilation membrane. The first inner surface supports and connects to the ventilation membrane, improving the stability of the ventilation membrane in the first passage.

[0023] One embodiment of this application further provides a battery having a battery cell. The battery further comprises a circuit board assembly according to any of the above embodiments, and the battery cell is electrically connected to the circuit board assembly.

[0024] One embodiment of this application provides an electrical device equipped with a battery according to any of the above embodiments.

[0025] In the circuit board assembly of this application, and in a battery and electrical equipment equipped with the circuit board assembly, the first insulating material is provided on the first surface and protects the electronic components on the first surface by covering at least a portion of the electronic components. The first insulating material is connected to the first housing to form a first space and protects the second surface located within the first space. The first ventilator is for balancing the air pressure in the first space with the air pressure in the external space. The first housing, the first insulating material, and the first ventilator together can comprehensively improve the protective capability of the circuit board assembly. [Brief explanation of the drawing]

[0026] Figure 1 is a schematic diagram showing the exploded structure of a circuit board assembly according to one embodiment of this application. Figure 2 is a schematic diagram of the circuit board in a circuit board assembly according to one embodiment of this application. Figure 3 is a schematic diagram of a circuit board assembly according to one embodiment of this application. Figure 4 is a cross-sectional view along the cutting line AA in Figure 3. FIG. 5 is a schematic configuration diagram showing a connection structure between a first connecting member and a circuit board in a circuit board assembly according to an embodiment of the present application. FIG. 6 is a schematic configuration diagram showing the structure of the first connecting member in a circuit board assembly according to an embodiment of the present application. FIG. 7 is an enlarged configuration diagram of part V in FIG. 4. FIG. 8 is a schematic configuration diagram showing the structure of a first valve body in a circuit board assembly according to an embodiment of the present application. FIG. 9 is a schematic configuration diagram of a battery according to an embodiment of the present application. FIG. 10 is a schematic configuration diagram of an electric device according to an embodiment of the present application.

MODE FOR CARRYING OUT THE INVENTION

[0027] Hereinafter, specific embodiments will further describe the present application while referring to the drawings.

[0028] Hereinafter, the invention according to the embodiments of the present application will be described together with the drawings in the embodiments of the present application. However, it is natural that the described embodiments are part of the embodiments of the present application, not all of the embodiments.

[0029] In addition, when a certain component is regarded as being "connected" to another component, it may be directly connected to another component, or there may be components arranged in the middle. Also, when a certain component is regarded as being "arranged" on another component, it may be directly arranged on another component, or there may be components arranged in the middle.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as that commonly understood by those skilled in the art of this application. Terms used herein are for illustrative purposes only and do not limit the scope of the application. "and / or" herein includes any and all combinations of one or more related items. In this specification, "vertical," "horizontal," "left," "right," "peak," "bottom," and similar terms are for illustrative purposes only and do not limit the application.

[0031] When two parts are arranged parallel or perpendicular to each other, they are arranged in the same direction, and there may be a certain angle between the two parts, and there is a tolerance of 0-±10% between the two parts, and the two parts may be larger, equal, or smaller within the tolerance range of 0-±10%.

[0032] One embodiment of the present disclosure provides a circuit board assembly comprising a circuit board, a first housing, a first insulating material, and a first ventilating material. The circuit board includes a first surface and a second surface arranged opposite to each other in a first direction. The circuit board further comprises electronic components provided on the first surface. The first housing includes a first recess on which the circuit board is provided, the first recess having a first bottom wall, and the second surface facing the first bottom wall. The first insulating material is provided on the first surface and is provided so as to cover at least a portion of the electronic components, and the first insulating material is connected to the first housing to form a first space. The projections of the first insulating material and the first space overlap in a first direction. The first ventilating material communicates the first space with an external space.

[0033] In the circuit board assembly described above, the first insulating material is provided on the first surface and is provided so as to cover at least a portion of the electronic components, thereby protecting the electronic components on the first surface. The first insulating material is connected to the first housing to form a first space, protecting the second surface located within the first space. The first ventilator is for balancing the air pressure in the first space with the air pressure in the external space. The first housing, the first insulating material, and the first ventilator together can comprehensively improve the protective capabilities of the circuit board assembly.

[0034] Embodiments of this application will be further described with reference to the drawings.

[0035] Referring to Figure 1, one embodiment of the present application provides a circuit board assembly 100 comprising a circuit board 10. The circuit board 10 includes a first surface 11 and a second surface 12 that are arranged opposite each other in a first direction Z. The circuit board 10 further comprises electronic components 20 provided on the first surface 11. In some embodiments, the electronic components 20 can implement module functions such as data acquisition, control, protection, communication, energy calculation, signal transmission, and power transmission, and when the circuit board assembly 100 is used as a BMS (BATTERY MANAGEMENT SYSTEM) module, it can be used for monitoring and managing battery cells.

[0036] Referring to Figure 2, in some embodiments, the electronic component 20 includes a first electrical connection terminal 21, a second electrical connection terminal 22, a sampling connection material 23, and a charge / discharge interface 24. The first electrical connection terminal 21 is for electrically connecting to one of the positive and negative electrodes of the battery cell, and the second electrical connection terminal 22 is for electrically connecting to the other of the positive and negative electrodes of the battery cell. The sampling connection material 23 electrically connects to the battery cell to detect information from the battery cell. The charge / discharge interface 24 connects to the main body of the electrical device to supply power to the main body of the electrical device.

[0037] In some embodiments, the sampling connector 23 has a connection port 231 for electrically connecting to an external detection device, and a rubber ring 232 positioned around the connection port 231 to enhance the waterproof performance of the connection port 231.

[0038] Referring together to Figures 3 and 4, the circuit board assembly 100 further comprises a first housing 30, a first insulating material 40, and a first ventilating material 50. The first housing 30 has a first recess 31. The first recess 31 has a first bottom wall 311 facing the second surface 12. The first insulating material 40 is provided on the first surface 11 and covers at least a portion of the electronic components 20, protecting the electronic components 20 on the first surface 11. The first insulating material 40 is connected to the first housing 30 to form a first space 33. The first insulating material 40 overlaps the projection of the first space 33 in a first direction Z and separates the first space 33 from the external space. By having at least a portion of the second surface 12 located in the first space 33, the risk of the second surface 12 being exposed to the external space and damaged is reduced, improving the protection of the circuit board assembly 100.

[0039] In one embodiment, the second surface 12 is for connecting connecting materials such as leads of the electronic component 20, and the first space 33 is for protecting the connecting materials such as leads of the electronic component 20 located on the second surface 12.

[0040] Referring again to Figure 4, the first ventilation material 50 connects the first space 33 and the external space. The first ventilation material 50 discharges gas from the first space 33 when the air pressure inside the first space 33 is greater than the air pressure in the external space, thereby balancing the air pressure inside the first space 33 and the air pressure in the external space, and reducing the risk of the first insulating material 40 being affected by a pressure shock and detaching from the first housing 30.

[0041] In some embodiments, the first ventilation material 50 penetrates the circuit board 10 and the first insulating material 40, connecting the first space 33 with the external space.

[0042] In some embodiments, the first ventilation material 50 penetrates the circuit board 10 and the first insulating material 40 along the first direction Z.

[0043] In some embodiments, the first ventilation material 50 is inclined with respect to the first direction Z and penetrates the circuit board 10 and the first insulating material 40.

[0044] In the circuit board assembly 100 described above, the first insulating material 40 is provided on the first surface 11 and protects the electronic components 20 on the first surface 11 by covering at least a portion of the electronic components 20. The first insulating material 40 is connected to the first housing 30 to form a first space 33 and protects the second surface 12 located within the first space 33. The first ventilator 50 is for balancing the air pressure inside the first space 33 with the air pressure in the external space. Together, the first housing 30, the first insulating material 40, and the first ventilator 50 can comprehensively enhance the protective capabilities of the circuit board assembly 100.

[0045] Referring to Figures 3 and 4, in some embodiments, the first insulating material 40 is formed by potting a potting material onto the first surface 11 and allowing it to harden. Specifically, the potting material is preferably a two-component mixture of silicone, urethane, or epoxy resin liquid, which has excellent temperature resistance, insulation, mechanical strength, fluidity, adhesion, corrosion resistance, and a certain level of thermal conductivity.

[0046] In some embodiments, the first insulating material 40 has thermal conductivity, which is advantageous for heat dissipation of the electronic component 20 and is advantageous for improving the lifespan of the electronic component 20.

[0047] In some embodiments, the height at which the first insulating material 40 is placed on the first surface 11 in the first direction Z is greater than 1 mm. This covers the leads on the first surface 11 of the electronic component 20, preventing the leads of the electronic component 20 from being exposed and providing a protective effect. The height of the first insulating material 40 on the first surface 11 is one of 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm.

[0048] Referring together to Figures 5 and 6, in some embodiments, the first housing 30 further includes a first connecting member 32. The first connecting member 32 is provided on the first bottom wall 311, and is provided surrounding the circuit board 10 and connected to the circuit board 10 to form a first space 33. The first connecting member 32 supports the circuit board 10 and the first insulating material 40 in a first direction Z. The first insulating material 40 is connected to the first connecting member 10 and overlaps with the projection of the first space 33 in the first direction Z, separating the first space 33 from the external space.

[0049] In some embodiments, the first connecting member 32 has one end connected to the first bottom wall 311 and the other end extending in the first direction Z and connected to the circuit board 10.

[0050] In some embodiments, the first connecting member 32 has one end connected to the first bottom wall 311 and the other end extending diagonally with respect to the first direction Z and connected to the circuit board 10.

[0051] Referring together to Figures 4 and 6, in some embodiments, the circuit board 10 further has a third surface 13 provided between the first surface 11 and the second surface 12. The first connecting member 32 has a first region 321 and a second region 322 at the end away from the first bottom wall 311. The first region 321 connects to the second surface 12 toward the second surface 12 and supports and connects the circuit board 10 in the first direction Z. The second region 322 connects to the third surface 13 toward the third surface 13 and restricts the position of the circuit board 10, improving the connection stability between the first housing 30 and the circuit board 10.

[0052] In some embodiments, the first insulating material 40 is in contact with the second region 322. Specifically, in the manufacturing process, the second region 322 is aligned with the first surface 11 to contain the potting agent, reducing the risk of the potting agent overflowing, and forms the first insulating material 40 which is in contact with the second region 322 after the potting agent has hardened.

[0053] In some embodiments, a gap exists between the third surface 13 and the second region 322. The first region 321 is in contact with the second surface 122, which reduces the risk of potting agent flowing into the first space 33 through this gap. The first insulating material 40 is filled in the gap between the third surface 13 and the second region 322, increasing the contact area between the first insulating material 40 and the second region 322, and consequently improving the connection strength between the first insulating material 40 and the second region 322.

[0054] Referring to Figure 6, in some embodiments, the first housing 30 further comprises a second connecting member 34. At least a portion of the second connecting member 34 is located within the first space 33. The circuit board assembly 100 further comprises a first fixing member (not shown) that connects the second connecting member 34 to the circuit board 10, thereby improving the stability of the connection between the circuit board 10 and the first housing 30.

[0055] In some embodiments, the first fixing member penetrates the circuit board 10 and connects to the second connecting member 34, and the circuit board 10 is positioned and connected between the first fixing member and the second connecting member 34.

[0056] In some embodiments, the second connecting member 34 is connected to the first bottom wall 311 and extends in the first direction Z, with one end away from the first bottom wall 311 in contact with the second surface 12.

[0057] In some embodiments, the second connecting member 34 is connected to the first bottom wall 311 and extends diagonally with respect to the first direction Z, with one end away from the first bottom wall 311 in contact with the second surface 12.

[0058] In some embodiments, the first housing 30 includes a plurality of second connecting members 34, and the circuit board assembly 100 includes a corresponding number of first fixing members, the second connecting members 34 being spaced apart in the circumferential direction from the first connecting members 32 and connected one-to-one with the first fixing members. The number of second connecting members 34 may be 4, 6, 8, 10, 12, 14, etc.

[0059] Referring together to Figures 7 and 8, in some embodiments, the first ventilation material 50 has a first opening 51 that communicates with the first space 33, a second opening 52 that communicates with the external space, and a first passage 53 that connects the first opening 51 and the second opening 52. When the air pressure in the first space 33 is greater than the air pressure in the external space, the gas in the first space 33 enters the first passage 53 from the first opening 51 and is discharged to the external space through the second opening 53, thereby balancing the air pressure in the first space 33 and the air pressure in the external space.

[0060] In some embodiments, the first ventilation material 50 further comprises a ventilation membrane 54 provided within the first passage 53. The ventilation membrane 54 allows gas to circulate within the first passage 53 and reduces the risk of foreign matter from the external space entering the first space 33 through the first passage 53, thereby improving the protective capability of the circuit board assembly 100.

[0061] In some embodiments, the breathable membrane 54 is waterproof, which reduces the risk of moisture entering the first space 33 through the breathable membrane 54.

[0062] The breathable membrane 54 is made of polytetrafluoroethylene, polyethylene, or thermoplastic polyurethane elastomer.

[0063] In some embodiments, the circuit board assembly 100 further includes a first connection hole 14 penetrating the circuit board 10 and a second connection hole 41 penetrating the first insulating material 40, the second connection hole 41 communicating with the first connection hole 14. The first ventilation material 50 has a first portion 50a and a second portion 50b. At least a portion of the first portion 50a is provided in the first connection hole 14 to improve the stability of the connection between the first ventilation material 50 and the circuit board 10. At least a portion of the second portion 50b is provided in the second connection hole 41 to improve the stability of the connection between the first ventilation material 50 and the first insulating material 40.

[0064] The first opening 51 is provided in the first portion 50a, and the second opening 52 is provided in the second portion 50b. In some embodiments, in the first direction Z, the height of the first surface 11 of the second portion 50b is greater than the height of the first insulating member 40 provided on the first surface 11, thereby reducing the risk of potting agent flowing into the first passage 53 through the second opening 52 and reducing the risk of the ventilation membrane 54 being punctured by foreign matter.

[0065] In some embodiments, the ventilation membrane 54 is provided in the first portion 50a. Specifically, the first portion 50a has a first inner surface 55 located within the first passage 53 toward the second portion 50b. The first inner surface 55 supports and connects the ventilation membrane 54 and improves the stability of the ventilation membrane 54 in the first passage.

[0066] The second portion 50b has a first outer surface 56 located within the first passage 53 toward the first portion 50a. The contact connection between the first outer surface 56 and the first surface 11 stably supports and fixes the second portion 50b to the first surface 11, improving the connection stability between the first ventilation material 50 and the circuit board 10.

[0067] In some embodiments, the first portion 50a and the second portion 50b are connected to each other along the first direction Z. Alternatively, when viewed along the first direction Z, the first inner surface 55 is annular, and the first outer surface 56 is provided concentrically with the first inner surface 55, enclosing it in an annular shape.

[0068] In some embodiments, the first housing 30 is made of an aluminum alloy or a magnesium alloy. The first part 50a and the second part 50b are made of plastic.

[0069] Referring to Figure 9, one embodiment of the present application further provides a battery 100 comprising a battery cell 90 and a circuit board assembly 100 according to any of the above embodiments. The battery cell 90 is electrically connected to the circuit board assembly 100. The circuit board assembly 100 can implement modular functions such as data collection, control, protection, communication, energy calculation, signal transmission, and power transmission, and monitors and manages the battery cell 90.

[0070] In some embodiments, the battery 200 further comprises a battery case 80. The first recess 31 is directed toward the battery case 80, and the first case 30 is connected to the battery case 80 to form a second space 81, in which the battery cells 90 are housed. The first case 30 protects the circuit board 10 and, together with the battery case 80, protects the battery cells 90, increasing the utilization rate of the first case 30, reducing the number of components in the battery 200, which is advantageous for making the battery 200 lighter.

[0071] In some embodiments, the system comprises a plurality of stacked battery cells 90, which are housed in a second space 81 and electrically connected to a circuit board assembly 100, and the circuit board assembly 100 manages the plurality of battery cells 90 synchronously.

[0072] Referring to Figure 10, the embodiment of this application provides an electrical device 300 equipped with a battery 200 according to any of the above embodiments. The electrical device 300 may be an electronic device such as a mobile phone or tablet, or a mechanical device such as a drone or electric vehicle.

[0073] In the circuit board assembly 100 described above, the first insulating material 40 is provided on the first surface 11 and protects the electronic components 20 on the first surface 11 by covering at least a portion of the electronic components 20. The first insulating material 40 is connected to the first housing 30 to form a first space 33 and protects the second surface 12 located within the first space 33. The first ventilator 50 is for balancing the air pressure inside the first space 33 with the air pressure in the external space. Together, the first housing 30, the first insulating material 40, and the first ventilator 50 can comprehensively enhance the protective capabilities of the circuit board assembly 100.

[0074] In the application fields of agricultural drone batteries, the following problems generally exist: Outdoor work involves environments where corrosion occurs due to salt spray, and pesticides and other substances can enter the battery as mist during spraying, making them extremely corrosive. Furthermore, if a battery is accidentally dropped into water during transport or operation, water can remain inside for a long period, and the high internal temperature during charging and discharging can accelerate corrosion of internal components. The circuit board assembly 100 in this application has resistance to salt spray, acid and alkali corrosion, and waterproof and dustproof performance, reducing the risk of corrosion failure of electronic components 20, improving the safety of use of agricultural drone batteries, and improving the reliability and lifespan of the battery. A person skilled in the art may make other modifications within the spirit of this application, and naturally, such modifications based on the spirit of this application are included within the scope of the disclosure. [Explanation of Symbols]

[0075] Circuit board assembly 100 battery 200 Electrical equipment 300 Circuit board 10 1st page 11 2nd side 12 3rd page 13 First connection hole 14 Electronic components 20 First electrical connection terminal 21 Second electrical connection terminal 22 Sampling connector 23 Connection port 231 Rubber ring 232 Charge / discharge interface 24 Case 1 30 First recess 31 First bottom wall 311 First connecting member 32 1st area 321 2nd area 322 1st space 33 Second connecting member 34 First insulating material 40 Second connection hole 41 First ventilation material 50 Part 1 50a Part 2 50b First opening 51 Second opening 52 1st aisle 53 Ventilated membrane 54 First inner part 55 1st outer surface 56 Battery housing 80 2nd space 81 Battery cell 90 1st direction Z

Claims

1. A circuit board assembly, wherein the circuit board of the circuit board assembly includes a first surface and a second surface arranged opposite to each other in a first direction, the circuit board further includes electronic components provided on the first surface, and the circuit board assembly further includes a first housing, a first insulating material, and a first ventilating material. The first housing includes a first recess on which the circuit board is provided, the first recess has a first bottom wall, and the second surface faces the first bottom wall. The first insulating material is provided on the first surface and covers at least a portion of the electronic component, the first insulating material is connected to the first housing to form a first space, and the projections of the first insulating material and the first space overlap in the first direction. The circuit board assembly is characterized in that the first ventilation material penetrates the circuit board and the first insulating material, and connects the first space with the external space.

2. In the first direction, The circuit board assembly according to claim 1, characterized in that the height at which the first insulating material is placed on the first surface is greater than 1 mm.

3. The circuit board assembly according to claim 1, characterized in that at least a portion of the second surface is located in the first space.

4. The circuit board assembly according to claim 1, characterized in that the first insulating material is formed by pouring an insulating material onto the first surface and curing it.

5. The circuit board assembly according to claim 1, wherein the first housing further includes a first connecting member provided on the first bottom wall, the first connecting member is arranged around the circuit board and connected to the circuit board to form a first space, and the first insulating material is connected to the first connecting member and overlaps with the projection of the first space in the first direction.

6. The circuit board assembly according to claim 5, further comprising a third surface provided between the first surface and the second surface, wherein the first connecting member has a first region and a second region at one end away from the first bottom wall, the first region being connected to the second surface, and the second region being connected to the third surface.

7. The circuit board assembly according to claim 6, characterized in that a gap is provided between the second region and the third surface, and the first insulating material is filled into the gap.

8. The circuit board assembly according to claim 6, characterized in that the first insulating material is in contact with the second region.

9. The circuit board assembly according to claim 5, wherein the first housing further includes a second connecting member, at least a portion of which is located within the first space, and the circuit board assembly further includes a first fixing member that connects the second connecting member and the circuit board.

10. The circuit board assembly according to claim 9, characterized in that the second connecting member is connected to the first bottom wall and extends along the first direction, and one end of the second connecting member away from the first bottom wall is in contact with the second surface.

11. The circuit board assembly according to claim 1, characterized in that the first ventilation material has a first opening that communicates with the first space, a second opening that communicates with the external space, and a first passage that connects the first opening and the second opening.

12. The circuit board assembly according to claim 11, characterized in that the first ventilation material further comprises a ventilation membrane provided in the first passage.

13. The circuit board assembly according to claim 12, further comprising a first connection hole penetrating the circuit board and a second connection hole penetrating the first insulating material, wherein the second connection hole communicates with the first connection hole, and the first ventilating material has a first portion and a second portion, wherein at least a portion of the first portion is provided in the first connection hole, and at least a portion of the second portion is provided in the second connection hole.

14. The circuit board assembly according to claim 13, characterized in that, in the first direction, the height of the second portion protruding from the first surface is greater than the height of the first insulating material provided on the first surface.

15. The circuit board assembly according to claim 13, characterized in that the second portion has a first outer surface located outside the first passage toward the first portion, and the first outer surface is in contact with the first surface.

16. The circuit board assembly according to claim 13, characterized in that the ventilation membrane is provided in the first portion.

17. The circuit board assembly according to claim 16, characterized in that the first portion has a first inner surface located inside the first passage toward the second portion, and the first inner surface is connected to the ventilation membrane.

18. A battery that includes battery cells, A battery further comprising a circuit board assembly according to any one of claims 1 to 17, wherein the battery cell is electrically connected to the circuit board assembly.

19. An electrical device characterized by including the battery described in claim 18.

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