Circuit board, battery pack and power supply equipment

Abstract

The embodiment of the utility model provides a circuit board, a battery pack comprising the circuit board, and power supply equipment comprising the battery pack, and relates to the technical field of circuit boards. Wherein the circuit board comprises a substrate, a first monitoring assembly and a plurality of electronic components, the plurality of electronic components are arranged on the substrate, and the plurality of electronic components comprise a controller; the first monitoring assembly comprises a first wire and a second wire, the first wire and the second wire are both arranged on the substrate and exposed outside the substrate, a gap is formed between the first wire and the second wire, the first wire and the second wire are electrically connected with the controller, and the controller is used for detecting the level change between the first wire and the second wire.

Description

Technical Field

[0001] The present application relates to the technical field of circuit boards, and in particular to a circuit board, a battery pack and a power supply device. Background Art

[0002] In order to protect the safety of the battery, a battery management system (BMS) is usually set up in the battery pack to prevent the battery from overcharging or over-discharging and to realize functions such as battery charging and discharging circuit control and management.

[0003] In the related art, the battery pack is usually installed in an outdoor cabinet. Due to the complex and changeable outdoor environment, the cabinet may be flooded during actual use (due to wind and rain erosion or some violent factors). If water enters the cabinet and is not discovered and measures are not taken in time, it will affect the normal operation of the battery pack and also pose a great safety hazard. Utility Model Content

[0004] The present application provides a circuit board, a battery pack including the circuit board, and a power supply device including the battery pack. A controller is used to detect whether the level between a first wiring and a second wiring changes, so that staff can promptly know whether water has entered the battery pack and take timely countermeasures after water has entered, thereby reducing the possibility of serious damage to the battery pack and reducing safety hazards.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect of the present application, a circuit board is provided, which includes a substrate, a first monitoring component and a plurality of electronic components, wherein the plurality of electronic components are arranged on the substrate, and the plurality of electronic components include a controller; the first monitoring component includes a first routing line and a second routing line, wherein the first routing line and the second routing line are both arranged on the substrate and exposed outside the substrate, wherein there is a spacing between the first routing line and the second routing line and the first routing line is electrically connected to the controller respectively, and the controller is used to detect a level change between the first routing line and the second routing line.

[0007] The first and second traces are exposed to the outside. When external liquid (for example, water) flows onto the circuit board, the liquid may contact the first and second traces. When the liquid contacts the first and second traces at the same time, the first and second traces are short-circuited by the liquid. The short circuit causes the level between the first and second traces to change. When the controller detects that the level between the first and second traces has changed, it can be determined that there is liquid on the circuit board. That is, when the circuit board is installed in a device (for example, a battery pack), the controller can be used to detect whether the level has changed, thereby determining whether external liquid has flowed into the device. The staff can quickly respond based on the detection results of the controller, reducing the possibility of serious damage to the circuit board and the device, and also reducing the potential safety hazards caused by the influx of external liquid.

[0008] In one embodiment of the present application, the substrate includes a first surface facing one side, and the first monitoring component is disposed in an edge region of the first surface.

[0009] When external liquid flows onto the circuit board, it will flow from the edge area of ​​the circuit board to the inner area of ​​the circuit board, and may also flow to other areas of the circuit board. The edge area of ​​the circuit board is an area that is easily wetted by liquid, or in other words, when the circuit board is installed in the device, the edge area of ​​the circuit board is closer to the water inlet point of the device. The first monitoring component is arranged in the edge area of ​​the first surface. When the liquid flows to the edge area of ​​the first surface, it can contact the first wiring and the second wiring at the same time. The controller can determine the presence of liquid by detecting the change in the electrical level. Through the above design method, the liquid can be sensed in a timely and effective manner before it flows to the inner area of ​​the circuit board, so that the staff can take countermeasures in advance.

[0010] In one embodiment of the present application, the circuit board also includes a plurality of second monitoring components arranged on the first surface, at least some of the plurality of electronic components are arranged on the first surface, and the plurality of second monitoring components are arranged at intervals along the circumference of at least one electronic component on the first surface, and each second monitoring component includes a third routing and a fourth routing exposed to the outside, and there is a spacing between the third routing and the fourth routing and they are respectively electrically connected to the controller, and the controller is used to detect the level change between the third routing and the fourth routing.

[0011] A plurality of second monitoring components are arranged in sections around the electronic components. When liquid flows around the electronic components, the liquid will short-circuit the third and fourth lines, causing the level between the third and fourth lines to change. The controller can sense the presence of liquid by detecting the change in the level between the third and fourth lines, and issue a fault alarm in time. On the basis of the first monitoring component being arranged in the edge area of ​​the first surface, a second monitoring component is also arranged around the electronic components, which can accurately determine the flow position of the liquid, assist the staff in determining which specific electronic component has liquid around it, make the detection result more accurate and more targeted, and facilitate the staff to take corresponding measures for different electronic components.

[0012] In one embodiment of the present application, the circuit board also includes a third monitoring component, the substrate includes a first surface and a second surface arranged opposite to each other, the first monitoring component is arranged on the first surface, the third monitoring component is arranged on the second surface, the third monitoring component includes a fifth routing line and a sixth routing line exposed to the outside, there is a spacing between the fifth routing line and the sixth routing line and they are respectively electrically connected to the controller, and the controller is used to detect the level change between the fifth routing line and the sixth routing line.

[0013] The substrate can be a double-sided circuit board, the first surface and the second surface are the surfaces on both sides of the substrate respectively, and electronic components may be arranged on the first surface and the second surface. When liquid wets the first surface or the second surface, the circuit board may be seriously damaged. The first monitoring component and the third monitoring component are arranged on the surfaces on both sides of the substrate respectively. When liquid exists on any one of the first surface and the second surface, the controller can sense the existence of liquid (external liquid flows into the device) through the level change between the corresponding traces, thereby improving the comprehensiveness and reliability of the detection.

[0014] In one embodiment of the present application, the first monitoring component is disposed on the side of one of the electronic components.

[0015] The first monitoring component can be set on the side of the electronic components that need special attention (for example, important components), and the specific position of the first monitoring component can also be set in a targeted manner according to the situation of the electronic components. For example, the first monitoring component can be set on the side of the corresponding electronic components that are easily contacted by external liquids, or the first monitoring component can be set on the side of the corresponding electronic components that need special attention. In this way, it is possible to implement key monitoring of a certain side of an electronic component. When the controller detects a level change between the first wiring and the second wiring, the staff can quickly know that there is liquid at the location where the first monitoring component is set, which is convenient for the staff to judge the liquid position, making the detection more accurate and more targeted.

[0016] In an embodiment of the present application, an extension direction of the first routing line is parallel to an extension direction of the second routing line, and a distribution direction of the first routing line and the second routing line is perpendicular to the extension direction of the first routing line.

[0017] Through the above design method, the first and second routing lines are arranged more regularly, which is convenient for wiring on the substrate, enhances the neatness and aesthetics of the circuit board layout, facilitates the layout of other electronic components, saves the substrate area, and improves the power density. In addition, the first and second routing lines adopt a relatively simple layout method, which is also convenient for the production and processing of the circuit board and reduces the manufacturing cost.

[0018] In an embodiment of the present application, the first routing line surrounds at least one electronic component, and the second routing line surrounds the periphery of the first routing line.

[0019] The first monitoring component is set around the important electronic components to focus on monitoring the important electronic components. When the liquid short-circuits the first and second wirings, it proves that the liquid has the possibility of contacting the important electronic components. The staff can respond quickly, reducing the possibility of further damage to the circuit board. This makes the liquid detection of the circuit board more targeted, and also makes the staff's response measures more targeted, improving efficiency.

[0020] In an embodiment of the present application, the first routing line and the second routing line respectively include copper foil.

[0021] Copper has a low resistivity and is a good conductive material. The first and second traces include copper sheets exposed outside the circuit board, which facilitates the liquid monitoring function. In addition, using copper sheets as the material of the first and second traces also facilitates the production of the circuit board.

[0022] In a second aspect of the present application, a battery pack is provided, which includes a shell, a battery cell and the above-mentioned circuit board, the battery cell and the circuit board are both arranged in the shell, the battery cell is electrically connected to the circuit board, and the circuit board is used to monitor and control the charging and discharging of the battery cell.

[0023] The circuit board is installed in the shell of the battery pack. When water enters the shell, the water contacts the first and second wirings at the same time, causing the electrical level between the first and second wirings to change. When the controller detects the change in electrical level, it can be determined that the battery pack may have water ingress. The staff can quickly respond based on the detection results of the controller, which reduces the possibility of serious damage to the battery pack and reduces safety hazards. In addition, the battery pack provided by the present application includes the above-mentioned circuit board, so the battery pack provided by the present application and the circuit board of the above-mentioned technical solution can solve the same technical problems and have the same technical effects.

[0024] The third aspect of the present application provides a power supply device, which includes a cabinet, a power distribution device and the above-mentioned battery pack, the power distribution device and the battery pack are both arranged in the cabinet, the battery pack is located below the power distribution device, the power distribution device is electrically connected to the battery pack, and the power distribution device is used to control the battery pack.

[0025] The battery pack has a water ingress detection function. When water enters the cabinet and flows into the battery pack, the staff can quickly respond according to the detection results of the controller, reducing the possibility of serious damage to the power supply equipment. The power supply equipment provided by this application includes the above-mentioned battery pack. Therefore, the power supply equipment provided by this application and the battery pack of the above-mentioned technical solution can solve the same technical problems and have the same technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a power supply device provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of a first circuit board provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of the first surface of the circuit board provided in an embodiment of the present application;

[0030] Figure 5 for Figure 4 Magnified view at P7 in the middle;

[0031] Figure 6 A schematic diagram of the structure of the second surface of the circuit board provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of a second circuit board provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of a third circuit board provided in an embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the structure of a fourth circuit board provided in an embodiment of the present application.

[0035] Reference numerals:

[0036] 100-power supply equipment; 101-cabinet;

[0037] 200-battery pack; 201-housing; 202-battery cell;

[0038] 300-circuit board;

[0039] 1-substrate; 11-first surface; 111-first straight edge; 112-second straight edge; 12-second surface;

[0040] 2-electronic components; 21-inductor; 22-terminal; 23-controller;

[0041] 3-first monitoring component; 31-first routing line; 32-second routing line;

[0042] 4-second monitoring component; 41-third routing line; 42-fourth routing line;

[0043] 5-the third monitoring component; 51-the fifth wiring; 52-the sixth wiring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0045] In this application, the terms "first", "second", etc. are used only for descriptive purposes to distinguish one element from another element, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0046] In the present application, unless otherwise clearly specified or limited, "plurality" means two or more.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In addition, in this application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0049] In the drawings of the embodiments of the present application, solid structures such as components and assemblies are represented by guide lines; hollow structures such as openings, holes, spaces, and cavities are represented by guide lines with arrows.

[0050] The present application provides a power supply device 100 for supplying power to a system or other device. For example, the power supply device 100 may be a communication power supply, or an energy storage container, etc. The present application does not impose any specific restrictions on the use scenario of the power supply device 100. Figure 1 , Figure 1 The structure of the power supply device 100 is shown by way of example. The power supply device 100 includes a cabinet 101. The cabinet 101 may be a square metal cabinet or a cabinet made of other materials or other shapes, and the present application does not impose any specific limitation on this.

[0051] Reference Figure 1 The power supply device 100 may also include a power distribution device (not shown in the drawings), a power supply device (not shown in the drawings) and a battery pack 200, and the power distribution device, the power supply device and the battery pack 200 are all arranged in the cabinet 101. The power distribution device is electrically connected to the battery pack 200 to control the battery pack 200, wherein the power distribution device may include a circuit breaker (for example, an air switch), the circuit breaker is used to control the on and off of the charging or discharging process of the battery pack 200, and the power distribution device may also include a voltage and current detector, a leakage detection device, and the like. The power supply device is electrically connected to the battery pack 200, and the power supply device is used to convert the external input AC power (for example, the mains) into DC power, so as to charge the battery pack 200, for example, the power supply device may include a rectifier.

[0052] In the attached Figure 1 In the example shown, the battery pack 200 is installed at the bottom of the cabinet 101, that is, the power distribution device and the power supply device are both located above the battery pack 200; in other examples, the battery pack 200 can also be installed in the middle or top of the cabinet 101.

[0053] The present application also provides a battery pack 200, referring to Figure 2 , Figure 2The internal structure of the battery pack 200 is shown as an example. The example battery pack 200 includes a housing 201, a battery cell 202 and a battery management system (BMS). Among them, the battery cell 202 is provided in plurality and is located in the housing 201. The battery management system may include a circuit board 300, for example, a printed circuit board (PCB). The circuit board 300 is electrically connected to the plurality of battery cells 202. The circuit board 300 is used to monitor and control the charging and discharging of the battery cells. For example, during the charging and discharging process of the battery cell 202, the circuit board 300 (through the devices thereon) can collect the voltage, temperature, charging and discharging current of the battery cell 202 and the total voltage of the battery pack 200 in real time to prevent the battery cell 202 from being overcharged or over-discharged.

[0054] Due to the complex and changeable external environment, the power supply device 100 may be flooded into the cabinet 101 during actual use due to wind and rain erosion or some violent factors. When water enters the cabinet 101, if it is not discovered in time and appropriate measures are not taken, the normal operation of the power supply device 100, the battery pack 200 and the circuit board 300 will be affected, and there will also be a great safety hazard.

[0055] In order to solve the above problems, the present application embodiment further provides a circuit board 300. Figure 3 , Figure 3 The structure of a circuit board 300 is exemplarily shown. The circuit board 300 includes a substrate 1 (eg, a copper-clad laminate) and a plurality of electronic components 2 . The plurality of electronic components 2 are arranged on the substrate 1 .

[0056] The substrate 1 has the functions of conducting, insulating and supporting. In one example, the circuit board 300 is selectively processed by hole processing, chemical copper plating, electroplating copper, etching, etc. on the substrate 1 to obtain the required circuit pattern. The circuit board 300 can be a single-sided board or a double-sided board (both sides can be wired and soldered). In the example where the circuit board 300 is a multi-layer circuit board, the substrate 1 can include multiple superimposed sub-boards.

[0057] Reference Figure 3 The substrate 1 includes a first surface 11 and a second surface 12 that are arranged opposite to each other, that is, the first surface 11 and the second surface 12 are arranged back to back in the thickness direction of the substrate 1, and the first surface 11 and the second surface 12 are surfaces facing different sides of the substrate 1. In the example where the circuit board 300 is a double-sided board, the first surface 11 may be the outer surface of the top layer (Top), and the second surface 12 may be the outer surface of the bottom layer (Bottom).

[0058] In one example, all of the multiple electronic components 2 may be disposed on the first surface 11 . In another example, a portion of the multiple electronic components 2 may be disposed on the first surface 11 , and another portion may be disposed on the second surface 12 .

[0059] Reference Figure 3 , multiple electronic components 2 may include power devices such as switching tubes and inductors 21; multiple electronic components 2 may also include control devices such as digital signal processing (DSP) chips, flash memory chips, and microcontroller units (MCU); multiple electronic components 2 may also include connecting devices such as connectors, for example, terminals 22 for wiring, wherein the terminals 22 may be input or output interface terminals, or may be communication ports, battery cell sampling ports, etc.

[0060] In addition, the plurality of electronic components 2 may further include other elements and devices not listed, and the present application does not impose any specific limitation on this.

[0061] The position of each electronic component 2 can be set as required, for example, Figure 3 On the first surface 11, a plurality of terminals 22 may be disposed in the edge region of the substrate 1 to facilitate external wiring. For another example, a plurality of control devices may be disposed in the control unit region of the substrate 1, and a plurality of power devices may be disposed in the power unit region of the substrate 1.

[0062] Reference Figure 3 The circuit board 300 also includes a first monitoring component 3, and the first monitoring component 3 includes a first routing line 31 and a second routing line 32. The first routing line 31 and the second routing line 32 are both arranged on the substrate 1 (for example, arranged on the first surface 11), and the first routing line 31 and the second routing line 32 are exposed outside the substrate 1. That is, the first routing line 31 and the second routing line 32 are both exposed to the air. For example, when the solder resist ink is applied to the surface of the substrate 1, the first routing line 31 and the second routing line 32 are not completely covered by the solder resist ink. There is a spacing between the first routing line 31 and the second routing line 32, that is, the first routing line 31 and the second routing line 32 do not contact each other. When the first routing line 31 and the second routing line 32 are in contact with the liquid at the same time, the level between the first routing line 31 and the second routing line 32 will change.

[0063] The first trace 31 and the second trace 32 may both be metal traces, for example, the first trace 31 and the second trace 32 include copper foil, or the first trace 31 and the second trace 32 may both be copper foil exposed outside the substrate 1. Copper has a low resistivity and is a good conductive material. Using copper foil as the material of the first trace 31 and the second trace 32 is conducive to the realization of functions and is also convenient for the production of the circuit board 300.

[0064] The plurality of electronic components 2 further include a controller 23, and the first wiring 31 and the second wiring 32 are electrically connected to the controller 23, respectively. The controller 23 is used to detect the level change between the first wiring 31 and the second wiring 32. When external liquid (for example, water) flows onto the circuit board 300, the liquid may contact the first wiring 31 and the second wiring 32. When the liquid contacts the first wiring 31 and the second wiring 32 at the same time, the first wiring 31 and the second wiring 32 are short-circuited by the liquid, and the short circuit causes the level between the first wiring 31 and the second wiring 32 to change. When the controller 23 detects that the level between the first wiring 31 and the second wiring 32 changes, it can be determined that the circuit board 300 is likely to be wetted by the liquid.

[0065] That is, when the circuit board 300 is installed in the battery pack 200, the controller 23 can determine whether external liquid has flowed into the battery pack 200 by detecting whether the level of the first monitoring component 3 has changed, and can sensitively and efficiently identify liquid inflow failures. The staff can quickly take countermeasures based on the detection results of the controller 23, reducing the possibility of serious damage to the circuit board 300 and the battery pack 200, and can also reduce safety hazards. In addition, by setting the first wiring 31 and the second wiring 32 to monitor the liquid, the structure is simple, and there is no need to set up other large-volume sensors, which can save space and improve power density.

[0066] The controller 23 may be present in any suitable structure. Figure 3 The controller 23 may be an independent device (eg, a chip), or a chip integrating multiple functions (including a level detection function) as the controller 23 of the present application, for example, a DSP chip with multiple functions.

[0067] In addition, the controller 23 may be disposed at any suitable position on the substrate 1 . For example, the controller 23 may be disposed on the first surface 11 , or the controller 23 may also be disposed on the second surface 12 .

[0068] The position of the first monitoring component 3 can be set as needed. For example, the first monitoring component 3 can be set at a position of the circuit board 300 that is easily wetted by liquid (or a position where liquid is easily present); for another example, the first monitoring component 3 can be set at a position of the circuit board 300 that is close to a point where water easily enters the battery pack 200; for another example, the first monitoring component 3 can be set around or to the side of an important electronic component 2. That is, the first monitoring component 3 can be set at any position on the circuit board 300.

[0069] In one embodiment provided in the present application, when water enters a device such as a battery pack 200, the water will first flow to the edge area of ​​the circuit board 300, and then flow from the edge area of ​​the circuit board 300 to the inner area of ​​the circuit board 300 (the edge area surrounds the inner area). The edge area of ​​the circuit board 300 is an area that is easily wetted by water. In order to focus on monitoring the edge area of ​​the circuit board 300, refer to Figure 3 The first monitoring component 3 can be set at the edge area of ​​the first surface 11. When water flows to the edge area of ​​the first surface 11, it is possible to contact the first wiring 31 and the second wiring 32 at the same time. When the first wiring 31 and the second wiring 32 are short-circuited by water, the controller 23 can determine the presence of water through the level change. Through the above design, water and other liquids can be detected in time and effectively before flowing to the inner area of ​​the circuit board 300, so that the staff can take countermeasures in advance, reducing the possibility of damage to a large number of electronic components 2.

[0070] The edge area of ​​the first surface 11 refers to the area close to the edge of the first surface 11. When the first monitoring component 3 is set in the edge area of ​​the first surface 11, the distance between the first monitoring component 3 and the center of the first surface 11 is greater than the distance between the first monitoring component 3 and the edge of the first surface 11. Figure 4 The position of the first monitoring component 3 is shown exemplarily, wherein the first monitoring component 3 can be set at P1, or at P2, P3, P4, P5 or P6, that is, the first monitoring component 3 can be set at any position of the edge area of ​​the first surface 11.

[0071] It should be noted that although Figure 3 and Figure 4 The first monitoring component 3 is shown to be located on one side of the terminal 22, but this does not mean that there is an inevitable positional relationship between the first monitoring component 3 and the terminal 22. That is, even if the terminal 22 and the first monitoring component 3 are both arranged at the edge area of ​​the first surface 11, the first monitoring component 3 can also be arranged at any position of the terminal 22, and can be arranged away from a terminal 22 or close to a terminal 22.

[0072] In some examples, in addition to the first monitoring component 3, a plurality of other monitoring components (e.g., a fourth monitoring component, a fifth monitoring component, etc.) may be provided at the edge of the first surface 11. Each of these monitoring components includes a plurality of routing lines (e.g., two routing lines). The plurality of routing lines of each monitoring component are arranged at intervals and are respectively electrically connected to the controller 23. The controller 23 is used to detect the level change between any two routing lines in each monitoring component. Among them, the plurality of monitoring components may include the first monitoring component 3. By providing a plurality of monitoring components, the monitoring area is larger, the monitoring is more comprehensive, and the liquid inlet fault can be identified sensitively and efficiently.

[0073] The controller 23 may be a device that can detect level changes of the above-mentioned multiple monitoring components (including the first monitoring component 3) respectively. The controller 23 may also include multiple detection devices, each detection device is used to detect level changes of one or a part of the monitoring components. In the example where the controller 23 includes multiple detection devices, all the detection devices may be arranged on the same surface of the substrate 1 (the first surface 11 or the second surface 12); or a part of the detection devices may be arranged on the first surface 11, and another part of the detection devices may be arranged on the second surface 12.

[0074] The first trace 31 may be in any suitable shape, for example, the first trace 31 may be in a bar shape, a snake shape, a zigzag shape, a meander shape, etc. Similarly, the second trace 32 may be in any suitable shape, for example, the second trace 32 may be in a bar shape, a snake shape, a zigzag shape, a meander shape, etc.

[0075] The layout of the first wiring 31 and the second wiring 32 can be determined according to the design requirements of the circuit board 300. Figure 4 , the extension direction of the first line 31 is parallel to the extension direction of the second line 32, and the distribution direction of the first line 31 and the second line 32 is perpendicular to the extension direction of the first line 31. Through this design method, the arrangement of the first line 31 and the second line 32 can be more regular, which is convenient for wiring on the substrate 1, making the layout of the circuit board 300 more neat and beautiful, and also conducive to the layout of other electronic components 2, saving space on the substrate 1, and improving the power density. In addition, the first line 31 and the second line 32 adopt a simple layout method, which is also convenient for the production and processing of the circuit board 300 and reduces the manufacturing cost.

[0076] exist Figure 4 In the example shown, the edge of the first surface 11 includes a first straight edge 111 and a second straight edge 112 that are perpendicular to each other. When the first monitoring component 3 is set at the P1 position, the first line 31 and the second line 32 are parallel to the first straight edge 111, and the second line 32 is located on the side of the first line 31 away from the first straight edge 111. When the first component is set at the P3 position, the first line 31 and the second line 32 are parallel to the second straight edge 112, and the second line 32 is located on the side of the first line 31 away from the second straight edge 112.

[0077] In other examples, the first trace 31 and the second trace 32 may not have an obvious parallel relationship.

[0078] In the example where the first monitoring device is disposed at the edge area of ​​the first surface 11, the first monitoring component 3 is close to the edge of the first surface 11. Figure 4When the first component is set at position P1, the spacing between the first trace 31 and the first straight edge 111 can be greater than or equal to 0.01 mm. For example, the spacing between the first trace 31 and the first straight edge 111 can be 0.01 mm, 0.3 mm, 1 mm, 5 mm, etc.

[0079] In order to allow the liquid to contact the first line 31 and the second line 32 at the same time, the distance between the first line 31 and the second line 32 cannot be too large. In the example where the first line 31 and the second line 32 are parallel, the distance between the first line 31 and the second line 32 can be less than or equal to 100 mm, for example, the distance between the first line 31 and the second line 32 is 5 mm, 10 mm, 50 mm, 100 mm. When there is no obvious parallel relationship between the first line 31 and the second line 32, the maximum distance between the first line 31 and the second line 32 can be less than or equal to 100 mm, for example, the maximum distance between the first line 31 and the second line 32 is 3 mm, 20 mm, 70 mm, 100 mm.

[0080] In addition, the first wiring 31 and the second wiring 32 may be of equal length or of unequal length, and this application does not impose any specific limitation on this.

[0081] In some examples, reference Figure 3 On the basis of the first monitoring assembly 3 being arranged at the edge area of ​​the first surface 11, the circuit board 300 may further include a plurality of second monitoring assemblies 4 arranged on the first surface 11. Among the plurality of electronic components 2, at least some of the electronic components 2 are arranged on the first surface 11, and the plurality of second monitoring assemblies 4 are arranged at intervals along the circumference of at least one electronic component 2 on the first surface 11.

[0082] For example, on the first surface 11, multiple second monitoring components 4 are arranged around one electronic component 2. For another example, on the first surface 11, multiple second monitoring components 4 surround multiple electronic components 2. That is, multiple second monitoring components 4 arranged at intervals can enclose a monitoring area, which is located on the first surface 11, and only one electronic component 2 can be arranged in the monitoring area (multiple second monitoring components 4 surround one electronic component 2), and multiple electronic components 2 can also be arranged in the monitoring area (multiple second monitoring components 4 surround multiple electronic components 2).

[0083] Each second monitoring component 4 includes a third wire 41 and a fourth wire 42 exposed to the outside (exposed to the air), with a spacing between the third wire 41 and the fourth wire 42, and the third wire 41 and the fourth wire 42 are respectively electrically connected to the controller 23, and the controller 23 is used to detect the level change between the third wire 41 and the fourth wire 42. The third wire 41 and the fourth wire 42 can both be metal wires, such as copper.

[0084] A plurality of second monitoring components 4 are arranged around the electronic component 2. When liquid flows around the electronic component 2, the liquid will short-circuit the third wiring 41 and the fourth wiring 42. The short circuit causes the voltage level between the third wiring 41 and the fourth wiring 42 to change. The controller 23 can determine the presence of liquid by detecting the change in voltage level between the third wiring 41 and the fourth wiring 42, and issue a fault alarm in time.

[0085] The first monitoring component 3 and the second monitoring component 4 are simultaneously arranged on the circuit board 300, which can accurately determine the flow position of the liquid and assist the staff in determining which specific electronic component 2 has liquid around it, thereby making the detection result more targeted and facilitating the staff to take corresponding measures for different electronic components 2.

[0086] The controller 23 may be a device that can detect the level change of the first monitoring component 3 and the level change of the second monitoring component 4. The controller 23 may also include multiple detection devices, one of which is used to detect the level change of the first monitoring component 3, and another detection device is used to detect the level change of multiple second monitoring components 4; or, one of which is used to detect the level change of the first monitoring component 3, another detection device is used to detect the level change of a part of the second monitoring components 4, and another detection device is used to detect the level change of another part of the second monitoring components 4. The structure of the controller 23, the number of devices included in the controller 23, and how the controller 23 performs the detection function are not specifically limited in this application.

[0087] In one example, referring to Figure 3 and Figure 4 , multiple second monitoring components 4 can be arranged around any electronic component 2. For example, multiple second monitoring components 4 can be arranged at position P7. For another example, multiple second monitoring components 4 can be arranged at position P8 and arranged around one of the terminals 22.

[0088] Taking the case where multiple second monitoring components 4 can be arranged at position P7 as an example, Figure 5 An enlarged view of P7 is shown as an example, referring to Figure 5 , each second monitoring component 4 includes a third line 41 and a fourth line 42, but the lengths of the third lines 41 of the plurality of second monitoring components 4 may be different from each other, and similarly, the lengths of the fourth lines 42 of the plurality of second monitoring components 4 may be different from each other. In other examples, the lengths and shapes of the plurality of third lines 41 may be the same, and the lengths and shapes of the plurality of fourth lines 42 may also be the same.

[0089] Reference Figure 5In each second monitoring component 4, the extension direction of the third line 41 is parallel to the extension direction of the fourth line 42, the distribution direction of the third line 41 and the fourth line 42 is perpendicular to the extension direction of the first line 31, and each third line 41 is parallel to the edge of its corresponding electronic component 2. In other examples, the third line 41 and the fourth line 42 may not have an obvious parallel relationship, and the third line 41 (or the fourth line 42) and the electronic component 2 may not have an obvious parallel relationship.

[0090] In addition, in some examples, the layout of the third line 41 and the fourth line 42 of any second monitoring component 4 is different from the layout of the third line 41 and the fourth line 42 of another second monitoring component 4. For example, in one of the second monitoring components 4, the third line 41 and the fourth line 42 are parallel, and in another second monitoring component 4, the third line 41 and the fourth line 42 are not obviously parallel.

[0091] In the example where multiple second monitoring components 4 surround the electronic component 2 , as long as multiple second monitoring components 4 surround the periphery of the electronic component 2 , the present application does not limit the number of the second monitoring components 4 and the surrounding method.

[0092] In other examples, in addition to the electronic components 2 surrounded by the second monitoring component 4, the peripheries of the remaining electronic components 2 may also be surrounded by multiple monitoring components. In these monitoring components, each monitoring component includes multiple routing lines (for example, two routing lines), and the multiple routing lines of each monitoring component are arranged at intervals and are respectively electrically connected to the controller 23, and the controller 23 is used to detect the level change between any two routing lines in each monitoring component.

[0093] In the example where the circuit board 300 is a multi-layer circuit board or a double-sided board, a plurality of electronic components 2 may be arranged on the first surface 11 and the second surface 12. When liquid wets the first surface 11 or the second surface 12, it is possible to cause serious damage to the circuit board 300. In order to improve the comprehensiveness and reliability of the detection structure, refer to Figure 6 , Figure 6 The structure of the second surface 12 is shown exemplarily. The circuit board 300 further includes a third monitoring component 5 . The third monitoring component 5 is arranged on the second surface 12 , that is, the third monitoring component 5 and the first monitoring component 3 are arranged on different sides of the substrate 1 .

[0094] Among them, refer to Figure 6The third monitoring component 5 includes a fifth wiring 51 and a sixth wiring 52 exposed to the outside. The fifth wiring 51 and the sixth wiring 52 can both be metal wirings, such as copper foil. In addition, there is a spacing between the first wiring 31 and the second wiring 32. The fifth wiring 51 and the sixth wiring 52 are electrically connected to the controller 23 respectively. The controller 23 is used to detect the level change between the fifth wiring 51 and the sixth wiring 52. The first monitoring component 3 and the second monitoring component 4 are respectively arranged on the surfaces on both sides of the substrate 1. If there is liquid on any of the first surface 11 and the second surface 12, the controller 23 can sense it through the level change between the corresponding wirings, thereby improving the comprehensiveness and reliability of liquid detection.

[0095] The controller 23 may be a device that can detect the level change of the first monitoring component 3 and the level change of the third monitoring component 5. The controller 23 may also include multiple detection devices, one of which is used to detect the level change of the first monitoring component 3, and the other is used to detect the level change of the third monitoring component 5.

[0096] The third monitoring component 5 can be arranged in the edge area of ​​the second surface 12, or can be arranged on the side of any electronic component 2 on the second surface 12, and the present application does not make any specific limitation on this.

[0097] In some examples, in addition to the third monitoring component 5, the second surface 12 may also be provided with a plurality of other monitoring components, each of which includes a plurality of routing lines (e.g., two routing lines), and the plurality of routing lines of each monitoring component are arranged at intervals and are respectively electrically connected to the controller 23, and the controller 23 is used to detect the level change between any two routing lines in each monitoring component. Through this design, the monitoring area on the second surface 12 can be made larger.

[0098] exist Figure 6 In the example shown, the extension direction of the fifth line 51 is parallel to the extension direction of the sixth line 52, and the distribution direction of the fifth line 51 and the sixth line 52 is perpendicular to the extension direction of the first line 31. In other examples, the fifth line 51 and the sixth line 52 may not have an obvious parallel relationship.

[0099] In another embodiment provided by the present application, the first monitoring component 3 can be arranged on the side of one of the electronic components 2. For example, the first monitoring component 3 can be arranged on the side of a chip, on the side of a capacitor or an inductor 21, or on the side of a terminal 22. Figure 7 The position of the first monitoring component 3 is shown as an example, referring to Figure 7 The first monitoring component 3 can be set at S1, S2, S3, S4, S5, S6 or S7.

[0100] The electronic component 2 with the first monitoring component 3 disposed on the side can be an electronic component 2 that needs to be paid special attention to (for example, a key component), or can be any electronic component 2, and the setting position of the first monitoring component 3 can also be determined according to the specific situation. For example, the first monitoring component 3 can be disposed on the side of the electronic component 2 that is easily soaked by liquid (the side close to the water inlet point of the device), or the first monitoring component 3 can be disposed on the side of the electronic component 2 that needs to be paid special attention to.

[0101] In this way, it is possible to focus on a certain side of a certain electronic component 2, and to accurately layout leak-prone points and key components, thereby improving the reliability of water ingress detection. When the controller 23 detects a level change between the first wiring 31 and the second wiring 32, the staff can quickly know that there is a risk of water ingress at the location where the first monitoring component 3 is set, which assists the staff in determining the liquid location and makes the detection structure more accurate.

[0102] In another embodiment provided by the present application, corresponding monitoring components are respectively provided on the sides of a plurality of electronic components 2, and a first monitoring component 3 is provided on the side of one of the electronic components 2. In another embodiment provided by the present application, a plurality of monitoring components (including the first monitoring component 3) are provided on the side of one of the electronic components 2. In another embodiment provided by the present application, among the plurality of electronic components 2, a plurality of monitoring components are provided on the side of each electronic component 2, and the plurality of monitoring components on the side of one of the electronic components 2 include the first monitoring component 3. In the above-mentioned monitoring components, each monitoring component includes a plurality of routing lines, and the plurality of routing lines of each monitoring component are arranged at intervals and are respectively electrically connected to the controller 23, and the controller 23 is used to detect the level change between any two routing lines in each monitoring component.

[0103] In another embodiment provided in the present application, the first routing line 31 surrounds at least one electronic component 2, and the second routing line 32 surrounds the periphery of the first routing line 31. For example, the first routing line 31 can surround a chip, a capacitor or an inductor 21, or a terminal 22. Figure 8 The example shows the situation where the first wiring 31 surrounds the electronic component 2, referring to Figure 8 , the first monitoring component 3 can be set at S8 (surrounding the chip) or S9 (surrounding the terminal 22).

[0104] Through the above design, the first monitoring component 3 is set at the periphery of an important electronic component 2, so as to focus on the electronic component 2. When the liquid short-circuits the first wiring 31 and the second wiring 32, it proves that the liquid has the possibility of contacting the electronic component 2, and the staff can respond quickly to reduce the possibility of further damage to the circuit board 300. The liquid detection of the circuit board 300 is more targeted, and the response measures of the staff are more targeted, which improves the detection and response efficiency.

[0105] In another embodiment provided by the present application, the first trace 31 surrounds a plurality of electronic components 2, and the second trace 32 surrounds the periphery of the first trace 31. For example, the first trace 31 may surround two or three electronic components 2, or may surround all electronic components 2 on the first surface 11. Fig. 9 The example shows that the first wiring 31 surrounds all the electronic components 2 on the first surface 11, referring to Fig. 9 The first routing line 31 and the second routing line 32 are both ring-shaped (for example, a square ring or a square frame), and the first routing line 31 and the second routing line 32 are arranged in the edge area of ​​the first surface 11 .

[0106] In addition, in order to reduce the possibility of oxidation of exposed routing lines, the first routing line 31, the second routing line 32, the third routing line 41, the fourth routing line 42, the fifth routing line 51 and the sixth routing line 52 can respectively include copper skin and an anti-oxidation layer, and the anti-oxidation layer is arranged on the surface of the copper skin, for example, tin is plated on the surface of the copper skin.

[0107] In other examples, the battery pack 200 of the present application may also be installed in other electric devices. For example, the battery pack 200 may be a battery pack 200 of an electric vehicle.

[0108] In other examples, the circuit board 300 of the present application may also be installed in other electronic devices or apparatuses.

[0109] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A circuit board, characterized in that: include: substrate; A plurality of electronic components, wherein the plurality of electronic components are arranged on the substrate, and the plurality of electronic components include a controller; A first monitoring component, the first monitoring component includes a first routing line and a second routing line, the first routing line and the second routing line are both arranged on the substrate and exposed outside the substrate, there is a gap between the first routing line and the second routing line and they are electrically connected to the controller respectively, and the controller is used to detect the level change between the first routing line and the second routing line.

2. The circuit board according to claim 1, characterized in that: The substrate includes a first surface facing one side, and the first monitoring component is arranged in an edge area of ​​the first surface.

3. The circuit board according to claim 2, characterized in that: The circuit board further comprises a plurality of second monitoring components arranged on the first surface, at least part of the plurality of electronic components are arranged on the first surface, and the plurality of second monitoring components are arranged at intervals along the circumference of at least one of the electronic components on the first surface. Each of the second monitoring components includes a third routing line and a fourth routing line exposed to the outside, wherein the third routing line and the fourth routing line are spaced apart and are electrically connected to the controller respectively, and the controller is used to detect a level change between the third routing line and the fourth routing line.

4. The circuit board according to claim 1, characterized in that: The circuit board further includes a third monitoring component, the substrate includes a first surface and a second surface arranged opposite to each other, the first monitoring component is arranged on the first surface, and the third monitoring component is arranged on the second surface. The third monitoring component includes a fifth routing line and a sixth routing line exposed to the outside, there is a gap between the fifth routing line and the sixth routing line and they are electrically connected to the controller respectively, and the controller is used to detect the level change between the fifth routing line and the sixth routing line.

5. The circuit board according to claim 1, characterized in that: The first monitoring assembly is arranged on the side of one of the electronic components.

6. The circuit board according to any one of claims 1 to 5, characterized in that: An extension direction of the first routing line is parallel to an extension direction of the second routing line, and a distribution direction of the first routing line and the second routing line is perpendicular to the extension direction of the first routing line.

7. The circuit board according to claim 1, characterized in that: The first routing line surrounds at least one of the electronic components, and the second routing line surrounds the periphery of the first routing line.

8. The circuit board according to claim 1, characterized in that: The first wiring and the second wiring respectively include copper sheets.

9. A battery pack, characterized in that: It comprises a shell, a battery cell and a circuit board according to any one of claims 1 to 8, wherein the battery cell and the circuit board are both arranged in the shell, the battery cell is electrically connected to the circuit board, and the circuit board is used to monitor and control the charging and discharging of the battery cell.

10. A power supply device, characterized in that: It comprises a cabinet, a circuit breaker and the battery pack as claimed in claim 9, wherein the circuit breaker and the battery pack are both arranged in the cabinet, the circuit breaker is located above the battery pack, the circuit breaker is electrically connected to the battery pack, and the circuit breaker is used to control the on and off of charging or discharging of the battery pack.

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