Circuit board assembly, battery information collector, battery pack, and vehicle

Abstract

This disclosure relates to a circuit board assembly, a battery information collector, a battery pack, and a vehicle. The circuit board assembly includes a circuit board and a draining device. The circuit board has a circuit for electrical connection with an electrical component, and the circuit has a fuse. The draining device is configured to drain liquid so that the liquid can contact the circuit and / or the fuse, thereby causing the fuse to disconnect the circuit from the electrical component. When the electrical component is a battery, the draining device can be used to drain electrolyte to the circuit and / or the fuse, causing the fuse to melt and disconnect the circuit from the battery. This prevents the accumulation of Joule heat inside the battery due to continuous short circuits, thereby preventing thermal runaway of the battery.

Description

Technical Field

[0001] This disclosure relates to the technical field of circuit boards, specifically to a circuit board assembly, a battery information collector, a battery pack, and a vehicle. Background Technology

[0002] Electrical equipment typically includes electrical components and circuit boards, which are electrically connected. The circuit board can be used to collect information from the electrical components and / or control them. In related technologies, when liquid is present near the circuit board, the liquid may come into contact with the circuit board, causing a short circuit in the circuit on the circuit board that is electrically connected to the electrical components. A sustained short circuit can cause Joule heat to accumulate inside the electrical components, leading to damage or thermal runaway.

[0003] For example, in a battery pack, the battery is electrically connected to a circuit board. When the electrolyte in the battery leaks, the electrolyte may come into contact with the circuit board, causing a short circuit in the circuit on the circuit board that is electrically connected to the battery. A continuous short circuit will cause Joule heat to accumulate inside the battery, which will lead to thermal runaway of the battery. Summary of the Invention

[0004] The purpose of this disclosure is to provide a circuit board assembly, a battery information collector, a battery pack, and a vehicle to at least partially solve the technical problems existing in the related art.

[0005] To achieve the above objectives, according to a first aspect of this disclosure, a circuit board assembly is provided, comprising: A circuit board having a circuit for electrical connection with electrical components, and the circuit having a fuse. A draining device configured to drain liquid so that the liquid can contact the circuit and / or the fuse, thereby causing the fuse to disconnect the electrical connection between the circuit and the electrical component.

[0006] Optionally, the drainage element is provided with a drainage groove for draining the liquid; or, The drainage component is provided with a drainage groove for draining the liquid. The ratio of the depth of the drainage groove to the thickness of the drainage component is 1 / 4 to 1 / 2; or... The drainage component is provided with a drainage groove for draining the liquid, and the depth of the drainage groove is 0.4mm-1mm; or, The drainage component is provided with a drainage channel for draining the liquid, and the ratio of the width to the depth of the drainage channel is 3 / 2-2; or, The drainage component is provided with a drainage groove for draining the liquid, and the width of the drainage groove is 0.6mm-2mm; or, The drainage element comprises a stacked polyimide layer and a mica layer; or, The fusing current of the fuse is 4A-5A.

[0007] Optionally, the drainage element is stacked with the circuit board, and the drainage channel is located on the side of the drainage element away from the circuit board. The drainage channel is configured to drain liquid located on the side of the drainage element away from the circuit board toward at least one edge of the drainage element.

[0008] Optionally, the drainage element has a first edge and a second edge opposite each other along a first direction, the first direction being perpendicular to the thickness direction of the drainage element; The drainage channel includes a first drainage channel, a first end of which penetrates the first edge, and a second end of which penetrates the second edge; The distance between the fuse and / or at least part of the circuit and the second edge is less than or equal to 1 / 2 of the maximum dimension of the drain in the first direction.

[0009] Optionally, the first drainage channel includes a plurality of first sub-channels and a plurality of second sub-channels, the first end of the first sub-channel penetrates through the first edge, the second end of the first sub-channel communicates with the first end of the second sub-channel, and the second end of the second sub-channel penetrates through the second edge; Both the first sub-slot and the second sub-slot extend along the first direction, and multiple first sub-slots and multiple second sub-slots are arranged at intervals along the second direction, which is perpendicular to the thickness direction of the draining member and intersects with the first direction.

[0010] Optionally, the circuit board is provided with a plurality of first electrical connection terminals and a plurality of second electrical connection terminals. The circuit is electrically connected to the electrical component through the first electrical connection terminals and the second electrical connection terminals. A plurality of first clearance slots are provided at the first edge, with each of the first electrical connection terminals corresponding to one of the first clearance slots. The first clearance slots can avoid the corresponding first electrical connection terminals. A first clearance slot is provided between two adjacent first sub-slots. Alternatively, a plurality of second clearance slots are provided at the second edge, with each of the second electrical connection terminals corresponding to one of the second clearance slots. The second clearance slots can avoid the corresponding second electrical connection terminals. A second clearance slot is provided between two adjacent second sub-slots. And / or... In the first direction, the first sub-slot and the second sub-slot are arranged in a staggered manner.

[0011] Optionally, the ratio of the distance *a* between two adjacent first sub-slots to the distance *b* between two adjacent first clearance slots satisfies: 1 / 2 ≤ *a / b* ≤ 1; and / or, The ratio of the distance c between two adjacent second sub-slots to the distance d between two adjacent second clearance slots satisfies: 1 / 2 ≤ c / d ≤ 1.

[0012] Optionally, the drainage member has a third edge and a fourth edge opposite each other along a second direction, the second direction being perpendicular to the thickness direction of the drainage member and intersecting with the first direction. The drainage groove further includes a second drainage groove, the two ends of which pass through the third edge and the fourth edge respectively. The second drainage groove intersects with and communicates with the first drainage groove; or, The draining member has a third edge and a fourth edge opposite to each other along a second direction, the second direction being perpendicular to the thickness direction of the draining member and intersecting with the first direction. The draining groove also includes a second draining groove, which extends along the second direction. The two ends of the second draining groove pass through the third edge and the fourth edge respectively. The second draining groove intersects with and communicates with the first draining groove.

[0013] Optionally, the first drainage channel includes a first sub-channel and a second sub-channel, a first end of the first sub-channel penetrating the first edge, a second end of the first sub-channel communicating with the second drainage channel, a first end of the second sub-channel communicating with the second drainage channel, and a second end of the second sub-channel penetrating the second edge; or, The first drainage channel includes a first sub-channel, a second sub-channel, and a third sub-channel. There are multiple second drainage channels, arranged at intervals along the first direction. The first end of the first sub-channel penetrates the first edge, and the second end of the first sub-channel communicates with the second drainage channel closest to the first sub-channel among the multiple second drainage channels. The first end of the second sub-channel also communicates with the second drainage channel closest to the second sub-channel among the multiple second drainage channels. The second end of the second sub-channel penetrates the second edge, and adjacent second drainage channels are connected through the third sub-channel; or... The first drainage channel includes a first sub-channel, a second sub-channel, and a third sub-channel. There are multiple second drainage channels, which are arranged at intervals along the first direction. The first end of the first sub-channel penetrates the first edge. The second end of the first sub-channel is connected to the second drainage channel closest to the first sub-channel among the multiple second drainage channels. The first end of the second sub-channel is connected to the second drainage channel closest to the second sub-channel among the multiple second drainage channels. The second end of the second sub-channel penetrates the second edge. Two adjacent second drainage channels are connected through the third sub-channel. The ratio of the distance e between two adjacent second drainage channels to the maximum dimension f of the drainage component in the first direction satisfies 1 / 5 ≤ e / f ≤ 1 / 3.

[0014] Optionally, at the intersection of the first and second drainage channels, the wall of the first drainage channel and the wall of the second drainage channel are connected by an arc-shaped transition section; or, At the intersection of the first and second drainage channels, the wall of the first drainage channel and the wall of the second drainage channel are connected by an arc-shaped transition segment, the radius of curvature of which is greater than the depth of the first and / or second drainage channels; or, At the intersection of the first and second drainage channels, the wall of the first drainage channel and the wall of the second drainage channel are connected by an arc-shaped transition section with a radius of curvature of 1mm-3mm.

[0015] Optionally, the electrical component includes multiple batteries arranged side by side, with adjacent batteries connected in series via connecting pieces, and the draining device is used to drain the electrolyte leaking from the battery; The circuit includes a first sampling circuit and a second sampling circuit. The first sampling circuit is configured to correspond to the connecting piece connected to the positive terminal of the plurality of batteries, and the first end of the first sampling circuit is used to electrically connect to the connecting piece connected to the positive terminal of the battery. The second sampling circuit is configured to correspond to the battery located in the even number position among the plurality of batteries, and the first end of the second sampling circuit is used to electrically connect to the casing of the battery located in the even number position among the plurality of batteries. At least one of the aforementioned fuse devices is provided on both the first sampling circuit and the second sampling circuit.

[0016] Optionally, the circuit further includes a third sampling circuit, wherein the second terminals of the first sampling circuit and the second sampling circuit corresponding to the even-numbered batteries in the plurality of batteries are both connected to the first terminal of the third sampling circuit, and at least one of the fuse devices is provided on the third sampling circuit; or, The circuit further includes a protection circuit, which has at least one fuse. A first terminal of the protection circuit is connected to a first terminal of a first sampling circuit corresponding to the even-numbered battery among the plurality of batteries. A second terminal of the protection circuit is electrically connected to a first terminal of a second sampling circuit. Alternatively... The circuit board is provided with a first electrical connection terminal and a second electrical connection terminal. The first end of the first sampling circuit is electrically connected to the connecting piece connected to the positive terminal of the battery through the first electrical connection terminal. The first end of the second sampling circuit is electrically connected to the casing of the battery located in the even number position among the plurality of batteries through the second electrical connection terminal.

[0017] According to a second aspect of this disclosure, a battery information collector is provided, including the circuit board assembly described above.

[0018] According to a third aspect of this disclosure, a battery pack is provided, including the circuit board assembly described above; or, The device includes a battery and the aforementioned circuit board assembly. The electrical components include the battery, and the draining element is disposed on the side of the circuit board near the battery to drain any leaked electrolyte from the battery; or... Including the aforementioned battery information collector; or, The device includes a battery and the aforementioned battery information collector. The electrical components include the battery, and the draining element is disposed on the side of the circuit board near the battery to drain any leaked electrolyte from the battery.

[0019] According to a fourth aspect of this disclosure, an electrical appliance is provided, comprising the circuit board assembly described above; or, Including the aforementioned battery information collector; or, This includes the battery pack mentioned above.

[0020] With the above technical solution, since the circuit connected to the electrical components is equipped with a fuse and the draining device can drain the liquid, when liquid appears near the circuit board, the draining device can drain the liquid so that the liquid comes into contact with the circuit and / or the fuse. When the liquid comes into contact with the circuit and / or the fuse, the circuit and / or the fuse will short-circuit and generate a large current, causing the fuse to melt. This will make the circuit where the fuse is located open-circuit, disconnecting the electrical connection between the circuit and the electrical components. This will prevent the Joule heat inside the electrical components from accumulating due to the continuous short circuit, thereby preventing the electrical components from being damaged by high temperature or from thermal runaway.

[0021] Furthermore, since the draining device can drain liquid, when liquid appears near the circuit board, the draining device can drain the liquid so that the fuse will melt within a short time after the liquid appears near the circuit board, thus disconnecting the electrical connection between the circuit board and the electrical components.

[0022] In applications where circuit board assemblies are electrically connected to batteries, the battery is the aforementioned electrical component. When electrolyte leakage occurs, the draining device can be used to divert the electrolyte to the circuit and / or fuse, causing the fuse to melt and disconnecting the electrical connection between the circuit and the battery. This prevents the accumulation of Joule heat inside the battery due to continuous short circuits, thereby preventing thermal runaway. When electrolyte leakage occurs, it indicates that the battery is in an abnormal state. The draining device can quickly divert the electrolyte to contact the circuit and / or fuse, disconnecting the electrical connection between the circuit board and the battery within a short time after electrolyte leakage, reducing the risk of thermal runaway.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an exploded view of a circuit board assembly provided in one embodiment of this disclosure.

[0025] Figure 2 This is a front view of the circuit board of a circuit board assembly provided in one embodiment of the present disclosure.

[0026] Figure 3 This is a front view of a drain element of a circuit board assembly provided in one embodiment of the present disclosure.

[0027] Figure 4 This is a circuit diagram illustrating the electrical connection between a circuit board assembly and multiple batteries according to one embodiment of the present disclosure.

[0028] Figure 5 This is a partial circuit diagram of a circuit board assembly provided in the first embodiment of this disclosure.

[0029] Figure 6 This is a partial circuit diagram of the circuit board assembly provided in the second embodiment of this disclosure.

[0030] Figure 7 This is a partial circuit diagram of a circuit board assembly provided in the third embodiment of this disclosure.

[0031] Explanation of reference numerals in the attached figures 100 - Circuit board assembly; 10 - Circuit board; 11 - First electrical connection terminal; 12 - Second electrical connection terminal; 20 - Drainage element; 21 - First edge; 22 - Second edge; 23 - Third edge; 24 - Fourth edge; 25 - First clearance groove; 26 - Second clearance groove; 30 - Drainage groove; 31 - First drainage groove; 311 - First sub-groove; 312 - Second sub-groove; 313 - Third sub-groove; 32 - Second drainage groove; 40 - Circuit; 41 - First sampling circuit; 42 - Second sampling circuit; 43 - Third sampling circuit; 44 - Protection circuit; 50 - Fuse; 200 - Battery. Detailed Implementation

[0032] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0033] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally defined as upper, lower, top, and bottom in the context of a vehicle in normal driving conditions. These terms are used solely for the convenience of describing the disclosure and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this disclosure. "Inner" and "outer" refer to the inner and outer contours of the corresponding components. Furthermore, the terms "first," "second," etc., are used to distinguish one element from another and do not imply sequentiality or importance.

[0034] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0035] like Figures 1 to 7 As shown, according to a first aspect of this disclosure, a circuit board assembly 100 is provided, including a circuit board 10 and a drain member 20. The circuit board 10 is provided with a circuit 40 for electrical connection with an electrical component. The circuit 40 is provided with a fuse 50. The drain member 20 is configured to drain liquid so that the liquid can contact the circuit 40 and / or the fuse 50, thereby causing the fuse 40 to disconnect the electrical connection between the circuit 40 and the electrical component.

[0036] With the above technical solution, since the circuit 40, which is electrically connected to the electrical components, is equipped with a fuse 50, and the draining device 20 can drain the liquid, when liquid appears near the circuit board 10, the draining device 20 can drain the liquid so that the liquid comes into contact with the circuit 40 and / or the fuse 50. When the liquid comes into contact with the circuit 40 and / or the fuse 50, the circuit 40 and / or the fuse 50 will short-circuit and generate a large current, causing the fuse 50 to melt. This will make the circuit 40 where the fuse 40 is located an open circuit, disconnecting the electrical connection between the circuit 40 and the electrical components, preventing the Joule heat inside the electrical components from accumulating due to the continuous short circuit, and thus preventing the electrical components from being damaged by high temperature or experiencing thermal runaway.

[0037] Furthermore, since the draining device 20 can drain liquid, when liquid appears near the circuit board 10, the draining device 20 can drain the liquid so that the fuse 40 melts shortly after liquid appears near the circuit board 10, disconnecting the electrical connection between the circuit board 10 and the electrical components.

[0038] In applications where the circuit board assembly 100 is electrically connected to the battery 200, the battery 200 is the aforementioned electrical component. When electrolyte leakage occurs in the battery 200, the draining component 20 can be used to drain the electrolyte to the circuit 40 and / or the fuse 50, thereby causing the fuse 50 to melt and disconnecting the electrical connection between the circuit 40 and the battery 200. This prevents the Joule heat inside the battery 200 from accumulating due to continuous short circuits, thus preventing thermal runaway of the battery 200. When electrolyte leakage occurs in the battery 200, it indicates that the battery 200 is in an abnormal state. The draining component 20 can quickly drain the electrolyte to make the circuit 40 and / or the fuse 50 contact it, disconnecting the electrical connection between the circuit board 10 and the battery 200 within a short time after electrolyte leakage occurs, reducing the risk of thermal runaway of the battery 200.

[0039] For the application scenario where the circuit board assembly 100 is used in the battery 200, the circuit board 200 can be a sampling circuit board or a control circuit board, and this disclosure does not limit it.

[0040] Furthermore, this disclosure does not limit the specific type of the fuse device 50. For example, the fuse device 50 may include an etched serpentine fuse, a series fuse, and a solid fuse. Etched serpentine fuses, series fuses, and solid fuses all have the advantage of fast melting, which helps to improve the speed at which the fuse device 50 disconnects the electrical connection between the circuit 40 and the electrical components.

[0041] This disclosure does not limit the fusing current of the fuse 50. As one embodiment, the fusing current of the fuse 50 is 4A-5A. Setting the fusing current of the fuse 50 to 4A-5A ensures that the fuse 50 disconnects the electrical connection between the circuit 40 and electrical components when the fuse 50 and / or the circuit 40 are in contact with liquid.

[0042] In order for the drainage element 20 to drain liquid, as one embodiment, such as Figure 1 and Figure 3 As shown, a flow channel 30 may be provided on the flow guide 20. The flow channel 30 is used to guide the liquid. The flow channel 30 can constrain the flow direction of the liquid and prevent the liquid from spreading everywhere. The flow channel 30 can guide the liquid towards the circuit 40 and / or the fuse 50, so that the circuit 40 and / or the fuse 50 come into contact with the liquid.

[0043] Here, liquid can enter the drainage channel 30 from any open part of the drainage channel 30 (such as the opening at the end of the drainage channel 30 or the slot of the drainage channel 30), and then flow along the drainage channel 30 to a position where it can contact the circuit 40 and / or the fuse device 50.

[0044] In other embodiments, the drainage element 20 may also have a drainage channel, through which liquid can flow in from one end and out from the other end to a position that can contact the circuit 40 and / or the fuse 50. Alternatively, the drainage element 20 may also be a drainage tube.

[0045] It is understood that the thickness of the drainage component 20, the depth of the drainage groove 30, and the width of the drainage groove 30 can be set according to actual needs, and this disclosure does not limit them.

[0046] In the exemplary embodiments provided in this disclosure, the ratio of the depth of the drainage groove 30 to the thickness of the drainage member 20 is 1 / 4 to 1 / 2 (including the endpoint values ​​of 1 / 4 and 1 / 2). This configuration ensures that the drainage groove 30 has sufficient flow area for liquid flow, and prevents the thickness of the drainage member 20 at the location of the drainage groove 30 from being too thin, which could cause liquid within the drainage groove 30 to penetrate the drainage member 20. For example, when the drainage groove 30 is used to drain leaked high-temperature electrolyte from the battery 200, it prevents the high-temperature electrolyte within the drainage groove 30 from melting through the drainage member 20.

[0047] Optionally, the depth of the drainage channel 30 can be 0.4mm-1mm (including the endpoint values ​​of 0.4mm and 1mm). This setting reduces the resistance of the drainage channel 30 to the flow of liquid, thereby improving the drainage effect of the drainage channel 30, and avoids excessive thickness of the drainage component 20, which helps to reduce the space occupied by the circuit board assembly 100.

[0048] Optionally, the ratio of the width to the depth of the drainage channel 30 can be 3 / 2 to 2 (including the endpoint values ​​of 3 / 2 and 2). This configuration ensures that the drainage channel 30 has sufficient flow area for liquid flow while avoiding excessive depth that would increase the thickness of the drainage component 20, and also provides low flow resistance, thereby improving the drainage effect of the drainage channel 30.

[0049] Optionally, the width of the drainage channel 30 can be 0.6mm-2mm (including the endpoint values ​​of 0.6mm and 2mm). This setting reduces the resistance of the drainage channel 30 to the flow of liquid, thereby improving the drainage effect of the drainage channel 30.

[0050] This disclosure does not limit the construction of the drain element 20. As one embodiment, the drain element 20 may include a stacked polyimide layer and a mica layer. The polyimide layer, as the "matrix phase," provides excellent toughness, film-forming properties, and processability. The mica layer, as the "reinforcing phase," provides high hardness, high heat resistance, and stable chemical properties. The stacked polyimide layer and mica layer are not easily melted or shrunk at high temperatures, thus maintaining structural integrity and helping to prevent the high-temperature electrolyte from burning through the drain element 20 in a short time.

[0051] Here, the drainage channel 30 can be located on the polyimide layer and the mica layer, away from the circuit board 10.

[0052] Optionally, such as Figure 1 As shown, the drainage element 20 and the circuit board 10 can be stacked. The drainage channel 30 is located on the side of the drainage element 20 away from the circuit board 10. The drainage channel 30 is configured to drain the liquid located on the side of the drainage element 20 away from the circuit board 10 toward at least one edge of the drainage element 20.

[0053] Since the draining component 20 is stacked with the circuit board 10, and the draining groove 30 is located on the side of the draining component 20 away from the circuit board 10, the liquid on the side of the draining component 20 away from the circuit board 10 can directly enter the draining groove 30 and flow to at least one edge of the draining component 20 under the action of the draining groove 30. In this way, the liquid can accumulate at the edge of the draining component 20 and the circuit board 10, so that the circuit 40 and / or the fuse 50 on the circuit board 10 can come into contact with the liquid.

[0054] This disclosure does not limit the specific shape of the drainage member 20; for example, the drainage member 20 can be constructed as a block-shaped member. As an exemplary embodiment provided in this disclosure, such as... Figure 1 As shown, the drainage element 20 can be constructed as a plate-shaped element.

[0055] Optionally, a drain element 20 may be provided on the side of the circuit board 10 closest to the electrical component, or a drain element 20 may be provided on both the side of the circuit board 10 closest to the electrical component and the side furthest from the electrical component.

[0056] Optionally, such as Figure 3 As shown, the draining member 20 has a first edge 21 and a second edge 22 opposite to each other along a first direction, the first direction being perpendicular to the thickness direction of the draining member 20. The draining groove 30 includes a first draining groove 31, a first end of which extends through the first edge 21, and a second end of which extends through the second edge 22. The distance between the fuse 50 and / or at least a portion of the circuit 40 and the second edge 22 is less than or equal to half the maximum dimension of the draining member 20 in the first direction. Here, the distance between the fuse 50 and / or at least a portion of the circuit 40 and the second edge 22 refers to the distance between the edge of the fuse 50 and / or at least a portion of the circuit 40 closest to the second edge 22 and the second edge 22 in the first direction.

[0057] This configuration allows liquid located at the first edge 21 of the draining member 20 to flow into the draining channel 30 from the first end of the first draining channel 31. Then, under the guiding effect of the draining channel 30, the liquid flows out from the second end of the draining channel 30 to the second edge 22. Since the distance between the fuse 50 and / or at least part of the circuit 40 and the second edge 22 is less than or equal to half the maximum dimension of the draining member 20 in the first direction—that is, the fuse 50 and / or at least part of the circuit 40 is closer to the second edge 22 than the first edge 21—the liquid drained to the second edge 22 can quickly contact the circuit 40 and / or the fuse 50, disconnecting the electrical connection between the circuit 40 and the electrical components, reducing the risk of thermal runaway due to a short circuit. In other words, the configuration of the first draining channel 31 enables the draining member 20 to drain liquid located at its first edge 21 to contact the circuit 40 and / or the fuse 50.

[0058] When using the circuit board assembly 100, the first direction can be parallel to the vertical direction, and the first edge 21 can be located above the second edge 22. In this way, the liquid can flow from the first end of the first drainage channel 31 to the second end of the first drainage channel 31 under the action of gravity.

[0059] For example, in an application scenario where the circuit board assembly 100 is electrically connected to the battery 200, the circuit board assembly 100 can be disposed on the side of the battery 200, and the drain member 20 can be located between the circuit board 10 and the battery 200. The circuit board 10 is placed vertically with the fuse 50 and / or at least part of the circuit 40 close to the bottom of the circuit board 10. The drain member 20 is also placed vertically with its first edge 21 facing upward and its second edge 22 facing downward. In this way, when the electrolyte of the battery 200 leaks and enters the first drain channel 31, it can flow in the first drain channel 31 under the action of gravity and flow out from the second end of the first drain channel 31 (i.e., the bottom of the drain member 20), thereby contacting the fuse 50 and / or at least part of the circuit 40 located at the bottom of the circuit board 10, causing the fuse 50 to melt.

[0060] Understandably, the closer the fuse 50 and / or at least part of the circuit 40 is to the second edge 22, the easier and faster the fuse 50 and / or at least part of the circuit 40 can come into contact with the liquid flowing out from the second edge 22. Therefore, further, the distance between the fuse 50 and / or at least part of the circuit 40 and the second edge 22 can be less than or equal to 1 / 3 of the maximum dimension of the drain 20 in the first direction, or the distance between the fuse 50 and / or at least part of the circuit 40 and the second edge 22 can be less than or equal to 1 / 4 of the maximum dimension of the drain 20 in the first direction, or the distance between the fuse 50 and / or at least part of the circuit 40 and the second edge 22 can be less than or equal to 1 / 5 of the maximum dimension of the drain 20 in the first direction. The smaller the distance between the fuse 50 and / or at least part of the circuit 40 and the second edge 22, the greater the probability that the liquid flowing to the second edge 22 will come into contact with the circuit 40 and / or the fuse 50, and the shorter the contact time between the liquid and the circuit 40 and / or the fuse 50.

[0061] Optionally, such as Figure 3 As shown, the first drainage channel 31 includes a plurality of first sub-channels 311 and a plurality of second sub-channels 312. The first end of each first sub-channel 311 extends through the first edge 21, and the second end of each first sub-channel 311 communicates with the first end of each second sub-channel 312. The second end of each second sub-channel 312 extends through the second edge 22. Both the first sub-channels 311 and the second sub-channels 312 extend along a first direction, and the plurality of first sub-channels 311 and the plurality of second sub-channels 312 are arranged at intervals along a second direction. The second direction is perpendicular to the thickness direction of the drainage member 20 and intersects the first direction (e.g., the second direction is perpendicular to the first direction).

[0062] Since the first end of the first sub-slot 311 extends through the first edge 21, and multiple first sub-slots 311 are spaced apart along the second direction, liquid located at the first edge 21 can flow into the first drainage channel 31 from multiple different positions on the first edge 21. Since the second end of the second sub-slot 312 extends through the second edge 22, and multiple second sub-slots 312 are spaced apart along the second direction, liquid can flow out from multiple different positions on the second edge 22, thereby improving the ability of the drainage member 20 to guide liquid to contact the circuit 40 and / or the fuse device 50.

[0063] It is understood that the number of first sub-slots 311 and the number of second sub-slots 312 may be the same or different, and this disclosure does not limit this. Furthermore, the connection between the first sub-slots 311 and the second sub-slots 312 can be: the second end of one first sub-slot 311 is connected to the first end of one second sub-slot 312; the second end of one first sub-slot 311 is connected to the first ends of at least two second sub-slots 312; the second ends of at least two first sub-slots 311 are connected to the first ends of one second sub-slot 312; or the second ends of at least two first sub-slots 311 are connected to the first ends of at least two second sub-slots 312, and this disclosure also does not limit this.

[0064] In the specific use of the circuit board assembly 100, the first direction can be parallel to the vertical direction, and the second direction can be parallel to the horizontal direction.

[0065] In the case where the drain element 20 is disposed between the electrical component and the circuit board 10, in order to achieve the electrical connection between the circuit 40 on the circuit board 10 and the electrical component, as one implementation method, such as... Figures 1 to 3 As shown, the circuit board 10 is provided with a plurality of first electrical connection terminals 11 and a plurality of second electrical connection terminals 12, and the circuit 40 is electrically connected to electrical components through the first electrical connection terminals 11 and the second electrical connection terminals 12. A plurality of first clearance slots 25 are provided at the first edge 21, and a plurality of first electrical connection terminals 11 are correspondingly provided with the plurality of first clearance slots 25 (e.g., a plurality of first electrical connection terminals 11 are correspondingly provided with a plurality of first clearance slots 25, and each first electrical connection terminal 11 corresponds to one first clearance slot 25). The first clearance slots 25 can avoid the corresponding first electrical connection terminals 11, and a first clearance slot 25 is provided between two adjacent first sub-slots 311; and / or, a plurality of second clearance slots 26 are provided at the second edge 22, and a plurality of second electrical connection terminals 12 are correspondingly provided with a plurality of second clearance slots 26 (e.g., a plurality of second electrical connection terminals 12 are correspondingly provided with a plurality of second clearance slots 26, and each second electrical connection terminal 12 corresponds to one second clearance slot 26). The second clearance slots 26 can avoid the corresponding second electrical connection terminals 12, and a second clearance slot 26 is provided between two adjacent second sub-slots 312.

[0066] By using the first clearance slot 25 to avoid the corresponding first electrical connection terminal 11, and / or by using the second clearance slot 26 to avoid the corresponding second electrical connection terminal 12, the first electrical connection terminal 11 and / or the second electrical connection terminal 12 can pass through the guide member 20 and be electrically connected to the electrical component. This helps to shorten the length of the first electrical connection terminal 11 and the second electrical connection terminal 12, thereby reducing costs and improving the overall compactness of the circuit board assembly 100, and reducing the space occupied by the circuit board assembly 100.

[0067] A first clearance groove 25 is provided between each two adjacent first sub-slots 311, and / or a second clearance groove 26 is provided between each two adjacent second sub-slots 312. On the one hand, this helps the first sub-slots 311 and / or the second sub-slots 312 to cover a wider range in the first direction, thereby improving the drainage capacity of the drainage component 20. On the other hand, it can prevent the first electrical connection terminal 11 from blocking the liquid from flowing into the first sub-slot 311 and prevent the second electrical connection terminal 12 from blocking the liquid from flowing out of the second sub-slot 312. In other words, it can prevent the first electrical connection terminal 11 and the second electrical connection terminal 12 from obstructing the drainage component 20 from draining the liquid.

[0068] This disclosure does not limit the specific types of the first electrical connection terminal 11 and the second electrical connection terminal 12. As one embodiment, the first electrical connection terminal 11 and the second electrical connection terminal 12 may be nickel-plated terminals. In other embodiments, the first electrical connection terminal 11 and the second electrical connection terminal 12 may also be copper-plated terminals.

[0069] This disclosure does not limit the relative positions of the first sub-slot 311 and the second sub-slot 312. As one embodiment, such as... Figure 3 As shown, in the first direction, the first sub-slot 311 and the second sub-slot 312 are arranged in a staggered manner. In this way, in the first direction, the position where liquid flows into the first sub-slot 311 can be staggered from the position where liquid flows out of the second sub-slot 312.

[0070] This disclosure does not limit the distance between two adjacent first sub-slots 311. As one implementation, such as... Figure 3 As shown, the ratio of the distance 'a' between two adjacent first sub-slots 311 to the distance 'b' between two adjacent first clearance slots 25 satisfies: 1 / 2 ≤ a / b ≤ 1. This arrangement allows for a larger number of first sub-slots 311 while avoiding interference between the first electrical connection terminal 11 passing through the first clearance slot 25 and the first sub-slot 311, thereby improving the liquid drainage capacity of the drainage component 20.

[0071] Here, the distance 'a' between two adjacent first sub-slots 311 refers to the distance between the center of one first sub-slot 311 and the center of the other first sub-slot 311. The distance 'b' between two adjacent first clearance slots 25 refers to the distance between the center of one first clearance slot 25 and the center of the other first clearance slot 25.

[0072] This disclosure does not limit the distance between two adjacent second sub-slots 312. As one implementation, such as Figure 3 As shown, the ratio of the distance c between two adjacent second sub-slots 312 to the distance d between two adjacent second clearance slots 26 satisfies: 1 / 2 ≤ c / d ≤ 1. This arrangement allows for a larger number of second sub-slots 312 without interfering with the second electrical connection terminals 12 passing through the second clearance slots 26, thereby improving the liquid drainage capacity of the drainage component 20.

[0073] Here, the distance *c* between two adjacent second sub-slots 312 refers to the distance between the center of one second sub-slot 312 and the center of the other second sub-slot 312. The distance *d* between two adjacent second clearance slots 26 refers to the distance between the center of one second clearance slot 26 and the center of the other second clearance slot 26.

[0074] Optionally, such as Figure 3 As shown, the drainage member 20 has a third edge 23 and a fourth edge 24 opposite each other along a second direction, the second direction being perpendicular to the thickness direction of the drainage member 20 and intersecting with the first direction. The drainage groove 30 also includes at least one second drainage groove 32, the two ends of which pass through the third edge 23 and the fourth edge 24 respectively, and the second drainage groove 32 intersects with and communicates with the first drainage groove 31.

[0075] Since the two ends of the second drainage channel 32 pass through the third edge 23 and the fourth edge 24 respectively, the liquid located at the third edge 23 and the fourth edge 24 can enter the second drainage channel 32 from both ends. Since the second drainage channel 32 intersects and communicates with the first drainage channel 31, the liquid entering the second drainage channel 32 can flow into the first drainage channel 31 and flow out from the second end of the first drainage channel 31 to the second edge 22, thereby guiding the liquid to contact the circuit 40 and / or the fuse 50, disconnecting the electrical connection between the circuit 40 and the electrical components, reducing the risk of thermal runaway caused by short circuit.

[0076] In other words, the second drainage channel 32 enables the drainage member 20 to guide the liquid located at its third edge 23 and fourth edge 24 to contact the circuit 40 and / or the fuse 50.

[0077] Optionally, the second drainage channel 32 may extend along the second direction.

[0078] Optionally, the number of second drainage channels 32 can be one or more. In embodiments where there are multiple second drainage channels 32, liquid located at the third edge 23 and the fourth edge 24 can enter the second drainage channel 32 from more different positions at the third edge 23 and the fourth edge 24, thereby improving the ability of the drainage member 20 to drain liquid located at the third edge 23 and the fourth edge 24.

[0079] In this disclosure, the second end of the first sub-slot 311 can be directly connected to the first end of the second sub-slot 312, or indirectly connected to the first end of the second sub-slot 312. For example, in an embodiment where the drainage channel 30 further includes a second drainage channel 32, such as... Figure 3 As shown, the first drainage channel 31 includes a first sub-channel 311 and a second sub-channel 312. The first end of the first sub-channel 311 passes through the first edge 21, the second end of the first sub-channel 311 is connected to the second drainage channel 32, the first end of the second sub-channel 312 is connected to the second drainage channel 32, and the second end of the second sub-channel 312 passes through the second edge 22.

[0080] This configuration allows the second end of the first sub-slot 311 to be indirectly connected to the first end of the second sub-slot 312, thereby allowing the liquid in the second drainage channel 32 to flow into the second sub-slot 312, and the liquid in the first sub-slot 311 to flow into the second sub-slot 312 through the second drainage channel 32.

[0081] Optionally, such as Figure 3 As shown, the first drainage channel 31 includes a first sub-channel 311, a second sub-channel 312, and a third sub-channel 313. There are multiple second drainage channels 32, which are arranged at intervals along a first direction. The first end of the first sub-channel 311 passes through the first edge 21, and the second end of the first sub-channel 311 is connected to the second drainage channel 32 closest to the first sub-channel 311 among the multiple second drainage channels 32. The first end of the second sub-channel 312 is connected to the second drainage channel 32 closest to the second sub-channel 312 among the multiple second drainage channels 32. The second end of the second sub-channel 312 passes through the second edge 22, and two adjacent second drainage channels 32 are connected through the third sub-channel 313.

[0082] The second drainage channel 32 is multiple, which allows the liquid located at the third edge 23 and the fourth edge 24 to enter the second drainage channel 32 from more different positions at the third edge 23 and the fourth edge 24, thereby improving the ability of the drainage member 20 to drain the liquid located at the third edge 23 and the fourth edge 24.

[0083] Furthermore, through the third sub-slot 313, the liquid in the first sub-slot 311 can flow through the second diversion channel 32 and the third sub-slot 313 to the second sub-slot 312. It can also allow the liquid in multiple second diversion channels 32 to flow through the third sub-slot 313 to the second sub-slot 312. In other words, the third sub-slot 313 can provide a channel for the flow of liquid in the first sub-slot 311 and the liquid in the second diversion channel 32 to the second sub-slot 312.

[0084] This disclosure does not limit the distance between two adjacent second drainage channels 32. As one embodiment, such as Figure 3 As shown, the first drainage channel 31 includes a first sub-channel 311, a second sub-channel 312, and a third sub-channel 313. There are multiple second drainage channels 32, which are arranged at intervals along the first direction. The first end of the first sub-channel 311 passes through the first edge 21, and the second end of the first sub-channel 311 is connected to the second drainage channel 32 closest to the first sub-channel 311 among the multiple second drainage channels 32. The first end of the second sub-channel 312 is connected to the second drainage channel 32 closest to the second sub-channel 312 among the multiple second drainage channels 32. The second end of the second sub-channel 312 passes through the second edge 22. Two adjacent second drainage channels 32 are connected through the third sub-channel 313. The ratio of the distance e between two adjacent second drainage channels 32 to the maximum dimension f of the drainage component 20 in the first direction satisfies 1 / 5 ≤ e / f ≤ 1 / 3.

[0085] The ratio of the distance e between two adjacent second drainage channels 32 to the maximum dimension f of the drainage element 20 in the first direction satisfies 1 / 5≤e / f≤1 / 3. This can prevent the second drainage channels 32 from being set too many times and weakening the rigidity of the drainage element 20, while allowing the second drainage channels 32 to drain liquid at different positions on the third edge 23 and the fourth edge 24.

[0086] Here, the distance e between two adjacent second drainage channels 32 refers to the distance between the center of one second drainage channel 32 and the center of the other second drainage channel 32. The maximum dimension f of the drainage member 20 in the first direction refers to the distance between the two edges of the drainage member 20 that are furthest apart in the first direction.

[0087] Optionally, such as Figure 3As shown, at the intersection of the first drainage channel 31 and the second drainage channel 32, the wall of the first drainage channel 31 and the wall of the second drainage channel 32 are connected by an arc-shaped transition section. This arc-shaped transition section reduces the resistance to liquid flow from the first drainage channel 31 to the second drainage channel 32, and also reduces the resistance to liquid flow from the second drainage channel 32 to the first drainage channel 31.

[0088] Here, the arc segment can be a rounded chamfer or a non-rounded chamfer, and this disclosure does not limit it.

[0089] In this disclosure, the radius of curvature of the arc segment can be set to any suitable size. As one implementation method, such as... Figure 3 As shown, the radius of curvature of the arc segment is greater than the depth of the first drainage channel 31 and / or the second drainage channel 32. This arrangement reduces the resistance to liquid flow between the first drainage channel 31 and the second drainage channel 32.

[0090] Optionally, such as Figure 3 As shown, the radius of curvature of the arc segment can be 1mm-3mm (including the endpoint values ​​of 1mm and 3mm). The radius of curvature of the arc segment is 1mm-3mm, which can reduce the resistance to the flow of liquid between the first drainage channel 31 and the second drainage channel 32.

[0091] Optionally, such as Figures 4 to 7 As shown, the electrical components may include multiple batteries 200 arranged side by side, with adjacent batteries 200 connected in series via connecting pieces. A draining member 20 is used to drain any leaked electrolyte from the batteries 200. The circuit 40 includes a first sampling circuit 41 and a second sampling circuit 42. The first sampling circuit 41 is correspondingly configured with the connecting pieces connected to the positive terminals of the multiple batteries 200 (i.e., each connecting piece connected to the positive terminal of a battery 200 corresponds to a first sampling circuit 41), and its first end is electrically connected to the connecting piece connected to the positive terminal of the battery 200. The second sampling circuit 42 is correspondingly configured with the even-numbered batteries 200 among the multiple batteries 200 (i.e., each even-numbered battery 200 among the multiple batteries 200 corresponds to a second sampling circuit 42), and its first end is electrically connected to the casing of the even-numbered batteries 200 among the multiple batteries 200. At least one fuse 50 is provided on both the first sampling circuit 41 and the second sampling circuit 42.

[0092] Here, "battery 200 in an even-numbered position among multiple batteries 200" refers to the battery 200 arranged side-by-side whose order number is even. In other words, counting from one end along the arrangement direction of the multiple batteries 200, the batteries 200 with an even number of positions are 2n (where n is a positive integer). Similarly, "battery 200 in an odd-numbered position among multiple batteries 200" refers to the battery 200 with an odd number of positions counting from one end along the arrangement direction of the multiple batteries 200, the batteries 200 with an odd number of positions are 2n-1 (where n is a positive integer).

[0093] In the above embodiment, the connecting piece connected to the positive terminal of each battery 200 (including batteries 200 in even-numbered positions and batteries 200 in odd-numbered positions among the plurality of batteries 200) is correspondingly connected to the first sampling circuit 41. The casing of each battery 200 in even-numbered positions among the plurality of batteries 200 is correspondingly connected to the second sampling circuit 42.

[0094] Since the first terminal of the first sampling circuit 41 is electrically connected to the connecting piece of the positive terminal of the battery 200, and the first terminal of the second sampling circuit 42 is electrically connected to the casing of the even-numbered battery 200 among the multiple batteries 200, the circuit board 10 can collect information (e.g., voltage information) of each battery 200 through the first sampling circuit 41 and the second sampling circuit 42, thereby realizing the monitoring of each battery 200. Furthermore, when electrolyte leakage occurs in the battery 200, the draining member 20 can drain the leaked electrolyte. When the electrolyte is drained to contact the first sampling circuit 41 and / or the fuse 50 on the first sampling circuit 41, the fuse 50 can melt the first sampling circuit 41, thereby disconnecting the electrical connection between the first sampling circuit 41 and the connecting piece of the battery 200. When the electrolyte is channeled to contact the second sampling circuit 42 and / or the fuse 50 on the second sampling circuit 42, the fuse 50 can melt the second sampling circuit 42, thereby disconnecting the electrical connection between the second sampling circuit 42 and the battery 200 casing. This prevents thermal runaway of the battery 200 caused by a continuous short circuit between the first sampling circuit 41 and the second sampling circuit 42 due to electrolyte leakage.

[0095] Here, the second terminal of the first sampling circuit 41 and the second terminal of the second sampling circuit 42 can be directly electrically connected to the sampling / equalization port of the circuit board 10. The second terminal of the first sampling circuit 41 and the second terminal of the second sampling circuit 42 can also be electrically connected to the first terminal of the third sampling circuit 43 mentioned below, and indirectly electrically connected to the sampling / equalization port of the circuit board 10 through the second terminal of the third sampling circuit 43.

[0096] This disclosure does not limit the arrangement direction of the plurality of batteries 200. As one implementation, the plurality of batteries 200 may be arranged along the second direction mentioned above.

[0097] Optionally, such as Figure 4 As shown, along the arrangement direction of the multiple batteries 200, the first battery 200 among the multiple batteries 200 can be connected to the GND terminal (wire grounding terminal) of the circuit board 10, and the last battery 200 among the multiple batteries 200 can be connected to the power supply terminal of the circuit board 10, thereby realizing the power supply of the circuit board 10.

[0098] Alternatively, as one implementation method, such as Figure 5 As shown, the circuit 40 also includes a third sampling circuit 43. The second terminals of the first sampling circuit 41 and the second sampling circuit 42 corresponding to the even-numbered batteries 200 are both connected to the first terminal of the third sampling circuit 43. At least one fuse device 50 is provided on the third sampling circuit 43.

[0099] Since at least one fuse 50 is provided on the three-sampling circuit 40, when the electrolyte is diverted to contact the fuse 50 on the third sampling circuit 43 and / or the third sampling circuit 43, the fuse 50 can melt the third sampling circuit 43, thereby disconnecting the electrical connection between the circuit board 10 and the battery 200 connecting piece, and also disconnecting the electrical connection between the circuit board 10 and the battery 200 casing.

[0100] Optionally, the second terminal of the third sampling circuit 43 can be electrically connected to the sampling / equalization port of the circuit board 10.

[0101] Alternatively, as another implementation method, such as Figure 6 As shown, the circuit 40 may further include a protection circuit 44, which is provided with at least one fuse 50. The first end of the protection circuit 44 is connected to the first end of the first sampling circuit 41 corresponding to the even-numbered battery 200 among the plurality of batteries 200, and the second end of the protection circuit 44 is electrically connected to the first end of the second sampling circuit 42.

[0102] Under normal circumstances, since the protection circuit 44 is connected between the first terminal of the first sampling circuit 41 and the first terminal of the second sampling circuit 42 corresponding to the even-numbered battery 200, and the casing connected to the first terminal of the second sampling circuit 42 is suspended, the potentials of the first terminals of the first sampling circuit 41 and the second sampling circuit 42 corresponding to the even-numbered battery 200 are equal. However, if the casing of the battery 200 comes into contact with other conductors, it may cause the first terminal of the first sampling circuit 41, the first terminal of the second sampling circuit 42, and the conductor to form a loop, thereby generating current. If the conductor is directly grounded, the current in the loop will reach the melting condition of the fuse 50, and the fuse 50 can melt the third circuit 40, thereby preventing abnormal current from damaging the sampling port of the circuit board 10, and also avoiding battery 200 voltage sampling errors caused by "abnormal casing potential", preventing the BMS (Battery Management System) from misjudging the state of the battery 200.

[0103] In this disclosure, the number of fuses 50 on the first employing circuit 40 can be one or more, the number of fuses 50 on the second employing circuit 40 can be one or more, the number of fuses 50 on the third employing circuit 40 can be one or more, and the number of fuses 50 on the protection circuit 44 can be one or more. This disclosure does not limit the number of fuses 50 in any of these respects.

[0104] To achieve electrical connection between the first sampling circuit 41 and the second sampling circuit 42 and the battery 200, as one implementation method, such as... Figure 4 As shown, the circuit board 10 is provided with a first electrical connection terminal 11 and a second electrical connection terminal 12. The first end of the first sampling circuit 41 is electrically connected to the connecting piece connected to the positive terminal of the battery 200 through the first electrical connection terminal 11. The first end of the second sampling circuit 42 is electrically connected to the casing of the battery 200 located in the even number position among the multiple batteries 200 through the second electrical connection terminal 12.

[0105] The first electrical connection terminal 11 enables the first end of the first sampling circuit 41 to be electrically connected to the connecting piece connected to the positive terminal of the battery 200, and the second electrical connection terminal 12 enables the first end of the second sampling circuit 42 to be electrically connected to the casing of the battery 200 located in the even number of positions among the multiple batteries 200.

[0106] According to a second aspect of this disclosure, a battery information collector is provided, including the circuit board assembly 100 described above.

[0107] In addition to collecting voltage signals mentioned above, the battery information collector can also collect signals such as temperature and current. The collected data can be transmitted to the BMS (Battery Management System) main control unit for analysis, thereby implementing protection strategies for overcharge, over-discharge, and over-temperature of the battery 200.

[0108] According to a third aspect of this disclosure, a battery pack is provided, including the circuit board assembly 100 described above; or, including a battery 200 and the circuit board assembly 100 described above, wherein the electrical components include the battery 200, and a draining member 20 is disposed on the side of the circuit board 10 near the battery 200 to drain electrolyte leaking from the battery 200; or, including the battery information collector described above; or, including a battery 200 and the battery information collector described above, wherein the electrical components include the battery 200, and a draining member 20 is disposed on the side of the circuit board 10 near the battery 200 to drain electrolyte leaking from the battery 200.

[0109] According to a fourth aspect of this disclosure, an electrical device is provided, including the circuit board assembly 100 described above; or, including the battery information collector described above; or, including the battery pack described above.

[0110] This disclosure does not limit the type of electrical equipment. For example, electrical equipment may include vehicles, energy storage cabinets, skateboard chassis, etc.

[0111] A skateboard chassis integrates vehicle chassis components into a flat, skateboard-like structure, providing basic support for the vehicle body. A skateboard chassis may include at least two of the following: a battery pack, a motor, electronic controls, a suspension system, a steering system, and a braking system.

[0112] For embodiments involving electrical equipment including vehicles, this disclosure does not limit the type of vehicle. For example, the type of vehicle can be a pure electric vehicle, a hybrid vehicle, a range-extended vehicle, a gasoline vehicle, etc.

[0113] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0114] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0115] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A circuit board assembly, characterized in that, include: A circuit board having a circuit for electrical connection with electrical components, and the circuit having a fuse. A draining device configured to drain liquid so that the liquid can contact the circuit and / or the fuse, thereby causing the fuse to disconnect the electrical connection between the circuit and the electrical component.

2. The circuit board assembly according to claim 1, characterized in that, The drainage component is provided with a drainage groove, which is used to drain the liquid; or... The drainage component is provided with a drainage groove for draining the liquid. The ratio of the depth of the drainage groove to the thickness of the drainage component is 1 / 4 to 1 / 2; or... The drainage component is provided with a drainage groove for draining the liquid, and the depth of the drainage groove is 0.4mm-1mm; or, The drainage component is provided with a drainage channel for draining the liquid, and the ratio of the width to the depth of the drainage channel is 3 / 2-2; or, The drainage component is provided with a drainage groove for draining the liquid, and the width of the drainage groove is 0.6mm-2mm; or, The drainage element comprises a stacked polyimide layer and a mica layer; or, The fusing current of the fuse is 4A-5A.

3. The circuit board assembly according to claim 2, characterized in that, The drainage component is stacked with the circuit board, and the drainage channel is located on the side of the drainage component away from the circuit board. The drainage channel is configured to drain liquid located on the side of the drainage component away from the circuit board toward at least one edge of the drainage component.

4. The circuit board assembly according to claim 3, characterized in that, The draining member has a first edge and a second edge opposite to each other along a first direction, the first direction being perpendicular to the thickness direction of the draining member; The drainage channel includes a first drainage channel, a first end of which penetrates the first edge, and a second end of which penetrates the second edge; The distance between the fuse and / or at least part of the circuit and the second edge is less than or equal to 1 / 2 of the maximum dimension of the drain in the first direction.

5. The circuit board assembly according to claim 4, characterized in that, The first drainage channel includes multiple first sub-channels and multiple second sub-channels. The first end of the first sub-channel penetrates through the first edge, the second end of the first sub-channel communicates with the first end of the second sub-channel, and the second end of the second sub-channel penetrates through the second edge. Both the first sub-slot and the second sub-slot extend along the first direction, and multiple first sub-slots and multiple second sub-slots are arranged at intervals along the second direction, which is perpendicular to the thickness direction of the draining member and intersects with the first direction.

6. The circuit board assembly according to claim 5, characterized in that, The circuit board is provided with a plurality of first electrical connection terminals and a plurality of second electrical connection terminals. The circuit is electrically connected to the electrical components through the first electrical connection terminals and the second electrical connection terminals. A plurality of first clearance slots are provided at the first edge, and the plurality of first electrical connection terminals are correspondingly provided with the plurality of first clearance slots. The first clearance slots can avoid the corresponding first electrical connection terminals. A first clearance slot is provided between two adjacent first sub-slots. And / or, a plurality of second clearance slots are provided at the second edge, and a plurality of second electrical connection terminals are correspondingly provided with the plurality of second clearance slots. The second clearance slots can avoid the corresponding second electrical connection terminals. A second clearance slot is provided between two adjacent second sub-slots. And / or, In the first direction, the first sub-slot and the second sub-slot are arranged in a staggered manner.

7. The circuit board assembly according to claim 6, characterized in that, The ratio of the distance *a* between two adjacent first sub-slots to the distance *b* between two adjacent first clearance slots satisfies: 1 / 2 ≤ *a / b* ≤ 1; and / or, The ratio of the distance c between two adjacent second sub-slots to the distance d between two adjacent second clearance slots satisfies: 1 / 2 ≤ c / d ≤ 1.

8. The circuit board assembly according to claim 4, characterized in that, The draining member has a third edge and a fourth edge opposite each other along a second direction, the second direction being perpendicular to the thickness direction of the draining member, and the second direction intersecting the first direction; The drainage channel further includes at least one second drainage channel, the two ends of which pass through the third edge and the fourth edge respectively, and the second drainage channel intersects with and communicates with the first drainage channel; or, the drainage channel further includes at least one second drainage channel, the second drainage channel extends along the second direction, the two ends of which pass through the third edge and the fourth edge respectively, and the second drainage channel intersects with and communicates with the first drainage channel.

9. The circuit board assembly according to claim 8, characterized in that, The first drainage channel includes a first sub-channel and a second sub-channel. A first end of the first sub-channel penetrates the first edge, and a second end of the first sub-channel communicates with the second drainage channel. A first end of the second sub-channel also communicates with the second drainage channel, and a second end of the second sub-channel penetrates the second edge; or... The first drainage channel includes a first sub-channel, a second sub-channel, and a third sub-channel. There are multiple second drainage channels, arranged at intervals along the first direction. The first end of the first sub-channel penetrates the first edge, and the second end of the first sub-channel communicates with the second drainage channel closest to the first sub-channel among the multiple second drainage channels. The first end of the second sub-channel also communicates with the second drainage channel closest to the second sub-channel among the multiple second drainage channels. The second end of the second sub-channel penetrates the second edge, and adjacent second drainage channels are connected through the third sub-channel; or... The first drainage channel includes a first sub-channel, a second sub-channel, and a third sub-channel. There are multiple second drainage channels, which are arranged at intervals along the first direction. The first end of the first sub-channel penetrates the first edge. The second end of the first sub-channel is connected to the second drainage channel closest to the first sub-channel among the multiple second drainage channels. The first end of the second sub-channel is connected to the second drainage channel closest to the second sub-channel among the multiple second drainage channels. The second end of the second sub-channel penetrates the second edge. Two adjacent second drainage channels are connected through the third sub-channel. The ratio of the distance e between two adjacent second drainage channels to the maximum dimension f of the drainage component in the first direction satisfies 1 / 5 ≤ e / f ≤ 1 / 3.

10. The circuit board assembly according to claim 8, characterized in that, At the intersection of the first and second drainage channels, the wall of the first drainage channel and the wall of the second drainage channel are connected by an arc-shaped transition section; or, At the intersection of the first and second drainage channels, the wall of the first drainage channel and the wall of the second drainage channel are connected by an arc-shaped transition segment, the radius of curvature of which is greater than the depth of the first and / or second drainage channels; or, At the intersection of the first and second drainage channels, the wall of the first drainage channel and the wall of the second drainage channel are connected by an arc-shaped transition section with a radius of curvature of 1mm-3mm.

11. The circuit board assembly according to any one of claims 1-10, characterized in that, The electrical components include multiple batteries arranged side by side, with adjacent batteries connected in series via connecting pieces. The draining device is used to drain any electrolyte leaking from the batteries. The circuit includes a first sampling circuit and a second sampling circuit. The first sampling circuit is configured to correspond to the connecting piece connected to the positive terminal of the plurality of batteries, and the first end of the first sampling circuit is used to electrically connect to the connecting piece connected to the positive terminal of the battery. The second sampling circuit is configured to correspond to the battery located in the even number position among the plurality of batteries, and the first end of the second sampling circuit is used to electrically connect to the casing of the battery located in the even number position among the plurality of batteries. At least one of the aforementioned fuse devices is provided on both the first sampling circuit and the second sampling circuit.

12. The circuit board assembly according to claim 11, characterized in that, The circuit further includes a third sampling circuit, wherein the second terminals of the first sampling circuit and the second sampling circuit corresponding to the even-numbered batteries in the plurality of batteries are both connected to the first terminal of the third sampling circuit, and at least one of the fuse devices is provided on the third sampling circuit; or... The circuit further includes a protection circuit, which has at least one fuse. A first terminal of the protection circuit is connected to a first terminal of a first sampling circuit corresponding to the even-numbered battery among the plurality of batteries. A second terminal of the protection circuit is electrically connected to a first terminal of a second sampling circuit. Alternatively... The circuit board is provided with a first electrical connection terminal and a second electrical connection terminal. The first end of the first sampling circuit is electrically connected to the connecting piece connected to the positive terminal of the battery through the first electrical connection terminal. The first end of the second sampling circuit is electrically connected to the casing of the battery located in the even number position among the plurality of batteries through the second electrical connection terminal.

13. A battery information collector, characterized in that, Includes the circuit board assembly according to any one of claims 1-12.

14. A battery pack, characterized in that, Includes the circuit board assembly according to any one of claims 1-12; or, The device includes a battery and a circuit board assembly according to any one of claims 1-12, wherein the electrical component includes the battery, and the draining element is disposed on the side of the circuit board near the battery to drain any electrolyte leaking from the battery; or, Includes the battery information collector as described in claim 13; or, The device includes a battery and a battery information collector as described in claim 13. The electrical component includes the battery, and the draining element is disposed on the side of the circuit board near the battery to drain any electrolyte leaking from the battery.

15. An electrical appliance, characterized in that, Includes the circuit board assembly according to any one of claims 1-12; or, Including the battery information collector as described in claim 13; or, Includes the battery pack as described in claim 14.

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