Circuit Board Assemblies, Batteries, and Electrical Devices

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] The present application relates to the technical field of batteries, and in particular to a circuit board assembly, a battery, and an electrical device. [Background technology]

[0002] The reliability of circuit boards and circuit board components plays an important role in batteries and electrical devices. Conventional circuit board protection methods usually involve applying triple-proof (waterproof, moisture-proof, and corrosion-resistant) adhesive (conformal coating) to the component surface for protection, but the thickness of the triple-proof adhesive is limited, which affects the service life of batteries and electrical devices. Summary of the Invention

[0003] In view of this situation, it is necessary to provide a circuit board assembly that can improve the overall protection capability.

[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 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 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 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 the first space with an 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 to protect the electronic components on the first surface. The first insulating material is connected to the first housing to form a first space and protect the second surface located in the first space. The first ventilation material is for balancing the air pressure in the first space and the air pressure in the external space. The first housing, the first insulating material, and the first ventilation material can collectively improve the protection ability of the circuit board assembly.

[0006] In some embodiments of the present application, the height of the first insulating material disposed on the first surface in the first direction is greater than 1 mm, thereby covering the leads on the first surface of the electronic component and preventing the leads of the electronic component from being exposed, thereby achieving a protective effect.

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

[0008] In some embodiments of the present application, the first ventilation material penetrates the circuit board and the first insulating material to communicate the first space with the outside space.

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

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

[0011] In some embodiments of the present application, the circuit board further includes a third surface provided between the first surface and the second surface, and the first connecting member has a first region and a second region at an end remote from the first bottom wall, the first region is connected to the second surface and supports and connects the circuit board in the first direction, and the second region is connected to the third surface and serves to position the circuit board and enhance the connection stability between the circuit board and the first housing.

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

[0013] In some embodiments of the present application, the first insulating material is in contact with the second region, and during the manufacturing process, the second region is adapted to conform to the first surface and receive the potting material to reduce the risk of potting material overflow, and forms the first insulating material in contact with the second region after the potting material is cured.

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

[0015] In some embodiments of the present application, the second connecting member is connected to the first bottom wall and extends along the first direction, with one end remote from the first bottom wall contacting and connecting with the second surface.

[0016] In some embodiments of the present application, the first ventilation material has a first opening communicating with the first space, a second opening communicating with the external space, and a first passage communicating between the first opening and the second opening. When the air pressure in the first space is higher than the air pressure in the external space, gas in the first space enters the first passage from the first opening and is discharged to the external space through the second opening, thereby balancing the air pressure in the first space with the air pressure in the external space.

[0017] In some embodiments of the present application, the first ventilation material further includes a ventilation membrane disposed in the first passage, which allows gas in the first passage to flow and reduces a risk of foreign matter from the external space entering the first space through the first passage, thereby improving the protection capability of the circuit board assembly.

[0018] In some embodiments of the present application, the circuit board assembly further includes a first connection hole penetrating the circuit board and a second connection hole penetrating the 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 and improves 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 and improves the stability of the connection between the first ventilation material and the first insulating material.

[0019] In some embodiments of the present application, the second portion protrudes in the first direction beyond the height of the first insulating material disposed on the first surface, which is advantageous in reducing the risk of the potting material flowing into the first passage through the second opening and reducing the risk of the breathable membrane being broken by a foreign object.

[0020] In some embodiments of the present application, the second part has a first outer surface located outside the first passage toward the first part, and the first outer surface is in contact with and connected to the first surface, which is advantageous in that the second part is stably supported and fixed to the first surface, and in that the connection stability between the first ventilation material and the circuit board is increased.

[0021] In some embodiments of the present application, the breather membrane is provided in the first portion to improve stability of the breather membrane in the first passageway.

[0022] In some embodiments of the present application, the first portion has a first inner surface located inside the first passage toward the second portion, the first inner surface being connected to the breathable membrane, the first inner surface supporting and connecting the breathable membrane and improving the stability of the breathable membrane in the first passage.

[0023] An embodiment of the present application further provides a battery having a battery cell, the battery further comprising a circuit board assembly according to any of the above embodiments, the battery cell being electrically connected to the circuit board assembly.

[0024] An embodiment of the present application provides an electrical device including a battery according to any one of the above embodiments.

[0025] In the circuit board assembly, and the battery and electric device including the circuit board assembly of the present application, the first insulating material is provided on the first surface and covers at least a part of the electronic components to protect the electronic components on the first surface. The first insulating material is connected to the first housing to form a first space and protects the second surface located in the first space. The first ventilation material is for balancing the air pressure in the first space and the air pressure in the external space. The first housing, the first insulating material, and the first ventilation material can collectively improve the protective ability of the circuit board assembly. [Brief description of the drawings]

[0026] FIG. 1 is a schematic diagram showing an exploded structure of a circuit board assembly according to an embodiment of the present application. FIG. 2 is a schematic diagram of a circuit board in a circuit board assembly according to an embodiment of the present application. FIG. 3 is a schematic diagram of a circuit board assembly according to an embodiment of the present application. FIG. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a schematic diagram showing a connection structure between a first connection member and a circuit board in a circuit board assembly according to an embodiment of the present application. FIG. 6 is a schematic diagram showing a structure of a first connecting member in a circuit board assembly according to an embodiment of the present application. FIG. 7 is an enlarged configuration diagram of a portion V in FIG. FIG. 8 is a schematic diagram showing a structure of a first valve body in a circuit board assembly according to an embodiment of the present application. FIG. 9 is a schematic diagram of a battery according to an embodiment of the present application. FIG. 10 is a schematic diagram of an electrical device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, specific embodiments will be described further with reference to the drawings.

[0028] Hereinafter, the present invention according to the embodiments of the present application will be described with reference to the drawings of the embodiments of the present application. However, it should be understood that the described embodiments are only a part of the embodiments of the present application and do not include all of the embodiments.

[0029] Note that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be intermediate components present, and when a component is considered to be "disposed" on another component, it may be directly disposed on the other component or there may be intermediate components present.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of the present application. Terms used herein are used only for the purpose of describing particular embodiments and are not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated items. Terms such as "vertical", "horizontal", "left", "right", "top", "bottom" and similar terms are used herein for the purpose of description only and are not intended to limit the scope of the application.

[0031] When two parts are arranged parallel / perpendicularly, they may be aligned in the same direction, there may be a certain angle between the two parts, there may be 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 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 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 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 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 the first space with an external space.

[0033] In the above circuit board assembly, the first insulating material is provided on the first surface and is provided to cover at least a part of the electronic components to protect the electronic components on the first surface. The first insulating material is connected to the first housing to form a first space and protect the second surface located in the first space. The first ventilation material is for balancing the air pressure in the first space and the air pressure in the external space. The first housing, the first insulating material, and the first ventilation material can collectively improve the protection capability of the circuit board assembly.

[0034] The embodiments of the present application will be further described with reference to the drawings.

[0035] 1, an embodiment of the present application provides a circuit board assembly 100 including a circuit board 10. The circuit board 10 includes a first surface 11 and a second surface 12 disposed opposite to each other in a first direction Z. The circuit board 10 further includes an electronic component 20 provided on the first surface 11. In some embodiments, the electronic component 20 can realize module functions such as data collection, control, protection, communication, power calculation, signal transmission, and power transmission, and can be used to monitor and manage battery cells when the circuit board assembly 100 is used as a BMS (BATTERY MANAGEMENT SYSTEM) module.

[0036] 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 is electrically connected to the battery cell to detect information of the battery cell. The charge / discharge interface 24 is connected to the main body of the electric device to supply power to the main body of the electric device.

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

[0038] 3 and 4, the circuit board assembly 100 further includes a first housing 30, a first insulating material 40, and a first ventilation 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 to cover at least a part of the electronic component 20 and protect the electronic component 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 the first direction Z and separates the first space 33 from the external space. By positioning at least a part of the second surface 12 in the first space 33, the risk of the second surface 12 being exposed to the external space and damaged is reduced, and the protection of the circuit board assembly 100 is improved.

[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 connecting materials such as leads of the electronic component 20 located on the second surface 12.

[0040] 4 again, the first ventilation material 50 communicates the first space 33 with the external space. The first ventilation material 50 exhausts gas from the first space 33 when the air pressure in the first space 33 is higher than the air pressure in the external space, and balances the air pressure in the first space 33 with the air pressure in the external space, thereby reducing the risk that the first insulating material 40 will be subjected to a pressure shock and become detached 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 to communicate the first space 33 with the outside 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 above circuit board assembly 100, the first insulating material 40 is provided on the first surface 11 and covers at least a part of the electronic components 20, thereby 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, and protects the second surface 12 located within the first space 33. The first ventilation material 50 is for balancing the air pressure within the first space 33 and the air pressure in the external space. The first housing 30, the first insulating material 40, and the first ventilation material 50 can collectively enhance the protective ability of the circuit board assembly 100.

[0045] 3 and 4, in some embodiments, the first insulating material 40 is formed by potting and curing a potting material on the first surface 11. Specifically, the potting material is preferably a two-part silicone-based, urethane-based, or epoxy resin-based liquid material that has excellent temperature resistance, insulation properties, mechanical strength, fluidity, adhesiveness, corrosion resistance, and a certain degree of thermal conductivity.

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

[0047] In some embodiments, the height of the first insulating material 40 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, thereby providing a protective effect. The height of the first insulating material 40 on the first surface 11 is any one of 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, and 4 mm.

[0048] 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 the first connecting member 32 is provided to surround 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 member 40 in the first direction Z. The first insulating member 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 connection 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 connection member 32 has one end connected to the first bottom wall 311 and the other end extending obliquely with respect to the first direction Z and connected to the circuit board 10 .

[0051] 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 an end portion on the side remote from the first bottom wall 311. The first region 321 is connected 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 is connected 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, during the manufacturing process, the second region 322 conforms to the first surface 11 to contain the potting material and reduce the risk of the potting material spilling out, and forms the first insulating material 40 in contact with the second region 322 after the potting material hardens.

[0053] In some embodiments, a gap exists between the third surface 13 and the second region 322. The first region 321 contacts the second surface 122, thereby reducing the risk of the potting agent flowing into the first space 33 through the gap. The first insulating material 40 fills the gap between the third surface 13 and the second region 322, which increases the contact area between the first insulating material 40 and the second region 322 and thus improves the connection strength between the first insulating material 40 and the second region 322.

[0054] 6 , in some embodiments, the first housing 30 further includes a second connection member 34. At least a portion of the second connection member 34 is located within the first space 33. The circuit board assembly 100 further includes a first fixing member (not shown) that connects the second connection member 34 and the circuit board 10 to improve 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 connected in a positionally restricted manner 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 remote from the first bottom wall 311 contacting and connecting to the second surface 12 .

[0057] In some embodiments, the second connecting member 34 is connected to the first bottom wall 311 and extends obliquely with respect to the first direction Z, and one end remote from the first bottom wall 311 contacts and connects to the second surface 12 .

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

[0059] 7 and 8, in some embodiments, the first ventilation material 50 has a first opening 51 communicating with the first space 33, a second opening 52 communicating with the external space, and a first passage 53 communicating between the first opening 51 and the second opening 52. When the air pressure in the first space 33 is higher 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 includes a ventilation membrane 54 provided in the first passage 53. The ventilation membrane 54 allows gas to flow through 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 protection capability of the circuit board assembly 100.

[0061] In some embodiments, the breathable membrane 54 is waterproof, and the risk of moisture penetrating into the first space 33 through the breathable membrane 54 can be reduced.

[0062] The breathable membrane 54 is made of polytetrafluoroethylene, polyethylene or a 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, improving 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, improving 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, the height of the second portion 50b on the first surface 11 in the first direction Z is greater than the height of the first insulating member 40 provided on the first surface 11, thereby reducing the risk of the potting agent flowing into the first passage 53 through the second opening 52 and reducing the risk of the ventilation membrane 54 being broken by a foreign object.

[0065] In some embodiments, the breathable membrane 54 is disposed on the first portion 50a. Specifically, the first portion 50a has a first inner surface 55 that is located within the first passageway 53 toward the second portion 50b. The first inner surface 55 supports and connects the breathable membrane 54, improving the stability of the breathable membrane 54 in the first passageway.

[0066] The second portion 50b has a first outer surface 56 located within the first passage 53 toward the first portion 50a. The first outer surface 56 and the first surface 11 are in contact with each other, so that the second portion 50b is stably supported and fixed to the first surface 11, and the connection stability between the first ventilation material 50 and the circuit board 10 is improved.

[0067] In some embodiments, the first portion 50a and the second portion 50b are provided so as to be 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 and surrounds the first inner surface 55 in an annular shape.

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

[0069] 9, an embodiment of the present application further provides a battery 100 including 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 realize module functions such as collection, control, protection, communication, power calculation, signal transmission, power transmission, etc., and monitors and manages the battery cell 90.

[0070] In some embodiments, the battery 200 further includes a battery case 80. The first recess 31 faces the battery case 80, the first case 30 is connected to the battery case 80 to form a second space 81, the battery cell 90 is accommodated in the second space 81, the first case 30 protects the circuit board 10 and the battery cell 90 that is fitted to the battery case 80, which increases the utilization rate of the first case 30 and reduces the number of parts of the battery 200, which is advantageous for reducing the weight of the battery 200.

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

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

[0073] In the above circuit board assembly 100, the first insulating material 40 is provided on the first surface 11 and covers at least a part of the electronic components 20, thereby 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, and protects the second surface 12 located within the first space 33. The first ventilation material 50 is for balancing the air pressure within the first space 33 and the air pressure in the external space. The first housing 30, the first insulating material 40, and the first ventilation material 50 can collectively enhance the protective ability of the circuit board assembly 100.

[0074] In the application field of agricultural drone batteries, the following problems generally exist. In outdoor work, there are environments where erosion occurs due to salt fog, and during spraying of pesticides, etc., pesticides, etc., enter the inside of the battery as mist, which is extremely corrosive. In addition, after the battery is carelessly dropped into water during transportation or operation, water may remain inside for a long time, and the high internal temperature during charging and discharging of the battery may promote corrosion of the components inside the battery. The circuit board assembly 100 in this application has salt spray resistance, acid and alkali corrosion resistance, and waterproof and dustproof performance, which reduces the risk of corrosion failure of the electronic components 20, improves the use safety of the agricultural drone battery, and improves the reliability and life of the battery. It should be noted that those skilled in the art may make other modifications within the spirit of this application, and naturally, these modifications based on the spirit of this application are included in the scope of the disclosure of this application. [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 Connections 23 Connection port 231 Rubber ring 232 Charge / Discharge Interface 24 Case 1 30 First recess 31 1st bottom wall 311 First connector 32 1st area 321 2nd area 322 1st space 33 Second connector 34 First insulation 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 Breathable membrane 54 First inner surface 55 1st outer surface 56 Battery case 80 2nd space 81 Battery Cell 90 1st direction Z

Claims

1. A circuit board assembly, wherein a circuit board of the circuit board assembly includes a first surface and a second surface disposed opposite to each other in a first direction, the circuit board further includes an electronic component provided on the first surface, and the circuit board assembly further includes a first housing, a first insulating material, and a first ventilation material; 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 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 first insulating material and the first space overlap in projection in the first direction; The circuit board assembly, wherein the first ventilation material connects the first space to an exterior space.

2. In the first direction, 2. The circuit board assembly of claim 1, wherein the height of the first insulating material disposed above the first surface is greater than 1 mm.

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

4. 2. The circuit board assembly of claim 1, wherein the first ventilation material penetrates the circuit board and the first insulating material.

5. 2. The circuit board assembly of claim 1, wherein said first insulating material is formed by pouring an insulating material onto said first surface and allowing it to harden.

6. 2. The circuit board assembly of claim 1, wherein the first housing further includes a first connecting material provided on the first bottom wall, the first connecting material being 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 material and overlaps with a projection of the first space in the first direction.

7. 7. The circuit board assembly of claim 6, wherein the circuit board further includes a third surface disposed between the first surface and the second surface, and the first connecting material has a first region and a second region at one end away from the first bottom wall, the first region connecting to the second surface and the second region connecting to the third surface.

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

9. 8. The circuit board assembly of claim 7, wherein said first insulating material contacts said second region.

10. 7. The circuit board assembly of claim 6, wherein the first housing further includes a second connecting material at least a portion of which is located within the first space, and the circuit board assembly further includes a first fixing member connecting the second connecting material and the circuit board.

11. The circuit board assembly of claim 10, wherein the second connection material is connected to the first bottom wall and extends along a first direction, and one end of the second connection material away from the first bottom wall contacts and connects to the second surface.

12. 2. The circuit board assembly according to claim 1, wherein the first ventilation material has a first opening communicating with the first space, a second opening communicating with the external space, and a first passage communicating between the first opening and the second opening.

13. The circuit board assembly of claim 12 , wherein the first ventilation material further comprises a ventilation membrane disposed within the first passage.

14. 14. The circuit board assembly of claim 13, further comprising a first connection hole penetrating the circuit board and a second connection hole penetrating the first insulating material, the second connection hole communicating with the first connection hole, the first ventilation material having a first portion and a second portion, the first portion being at least partially provided in the first connection hole, and the second portion being at least partially provided in the second connection hole.

15. 15. The circuit board assembly of claim 14, wherein a height of the second portion protruding from the first surface in the first direction is greater than a height of the first insulating material provided on the first surface.

16. 15. The circuit board assembly of claim 14, wherein the second portion has a first outer surface located outside the first passage toward the first portion, the first outer surface being in contact with the first surface.

17. The circuit board assembly according to claim 14 , wherein the air permeable membrane is provided on the first portion.

18. 18. The circuit board assembly of claim 17, wherein the first portion has a first inner surface located inside the first passage toward the second portion, the first inner surface connecting with the ventilation membrane.

19. A battery including a battery cell, A battery further comprising the circuit board assembly of any one of claims 1 to 18, wherein the battery cells are electrically connected to the circuit board assembly.

20. 20. An electrical device comprising the battery of claim 19.

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