Circuit board assembly for battery welding machine and welding machine
By designing spaced heat sinks and air duct structures on the circuit board of the battery welding machine, combined with the fan outlet, the problem of insufficient heat dissipation performance of the circuit board was solved, achieving efficient heat dissipation of high-power devices and improving the performance of the welding machine.
Patent Information
- Application Number
- CN202423043642.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The heat dissipation performance of existing circuit boards cannot meet the needs of the increasing number of component modules, especially the heat dissipation performance of high-power devices.
Design a circuit board assembly for a battery welding machine, which uses two sets of heat sinks spaced apart in different directions, and air slots are set on the heat sinks. The air outlet of the fan is connected to the air slots to form an air channel. The component modules are set on or beside the heat sinks to realize heat exchange.
This improves the heat dissipation performance of high-power devices, thereby increasing the load rate and overall performance of the welding machine.
Smart Images
Figure CN223843941U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding equipment technology, and in particular to a circuit board assembly for a battery welding machine and a welding machine. Background Technology
[0002] With the development of welding power supply technology, battery-powered welding machines utilize various power supply methods, including Alternating Current (AC) mode, Direct Current (DC) mode, and a hybrid power supply mode combining DC and AC. These machines contain numerous internal components, requiring consideration of various factors such as electromagnetic compatibility, heat dissipation of high-power devices, and interference factors. As welding equipment becomes increasingly functional, the number of components on the circuit board also increases. However, the heat dissipation performance of the circuit boards in current technologies cannot meet the demands of this growing number of components. Therefore, improving the heat dissipation performance of high-power devices is a pressing issue that needs to be addressed. Utility Model Content
[0003] Based on this, it is necessary to address the technical problem that the heat dissipation performance of high-power devices in related technologies cannot meet the needs of increasing component modules, and to provide a circuit board assembly and welding machine for battery welding machines.
[0004] A circuit board assembly for a battery welding machine, the circuit board assembly for the battery welding machine comprising:
[0005] substrate;
[0006] Multiple radiators are divided into two groups, and the two groups of radiators are spaced apart along a first direction. Each group of radiators includes at least one radiator, and each radiator is provided with at least one air groove extending along a second direction.
[0007] A fan is disposed on the substrate and located at one end of the substrate along the second direction. The air outlet of the fan is connected to the air groove to form an air passage.
[0008] The component module includes multiple components, some of which are located on the heat sink and some of which are located on the side of the heat sink.
[0009] The first direction and the second direction intersect.
[0010] In some embodiments, each group of heat sinks includes at least two heat sinks, and the heat sinks in each group are spaced apart along the second direction.
[0011] In some embodiments, the component module includes a power factor correction component, the power factor correction module comprising:
[0012] A power device silicon bridge is disposed on the heat sink;
[0013] A rectifier boost diode is disposed on the heat sink;
[0014] The power device silicon bridge and the rectifier boost diode, which are located on the same heat sink, are spaced apart.
[0015] In some embodiments, the component module includes:
[0016] A filter capacitor is disposed on the substrate and located between the two sets of heat sinks.
[0017] In some embodiments, the component module includes an inverter module, the inverter module comprising:
[0018] Multiple insulated gate bipolar transistors are provided, with every two insulated gate bipolar transistors located beside one of the heat sinks and on the side of the heat sink away from the air groove.
[0019] In some embodiments, the substrate has a front end and a rear end along the first direction, and a head end and a tail end along the second direction; the component module further includes:
[0020] A control circuit module is located at the intersection of the front end and the first end of the substrate.
[0021] In some embodiments, the component module further includes:
[0022] A switching power supply circuit module is located at the middle of the rear end of the substrate.
[0023] In some embodiments, each of the heat sinks includes:
[0024] Connecting main body;
[0025] A plurality of heat dissipation fins are connected to the connecting body, and the plurality of heat dissipation fins are spaced apart, with the gap between two adjacent heat dissipation fins forming the air groove.
[0026] In some embodiments, the slots of the air channels of two opposite radiators in the two sets of radiators are arranged opposite each other.
[0027] A welding machine comprising a circuit board assembly for a battery welding machine as described above.
[0028] The beneficial effects of this utility model are:
[0029] This invention provides a circuit board assembly for a battery welding machine. The substrate connects and supports a heat sink, a fan, and component modules, forming a circuit between the components to achieve their respective functions. Two sets of heat sinks are mounted on the substrate, each set including at least one heat sink, with air grooves extending along a second direction on each heat sink. A fan is mounted on the substrate at one end along the second direction, with its outlet connected to the air grooves to form an air passage. When the fan blows air, the air flows into the air grooves on the heat sink, reducing its temperature. The heat sink exchanges heat with the surrounding environment and components, thus dissipating heat. Component modules are mounted on or beside the heat sink, allowing them to exchange heat with it, further contributing to heat dissipation. With the above structural form, the heat dissipation performance of high-power devices can be improved by placing them on or beside the heat sink, thereby increasing the load rate of the welding machine and improving the performance of the welding machine. Attached Figure Description
[0030] Figure 1 A layout diagram of a circuit board assembly for a battery welding machine provided in an embodiment of the present invention;
[0031] Figure 2 A partially enlarged schematic diagram of a circuit board assembly for a battery welding machine provided in an embodiment of this utility model;
[0032] Figure 3 This is a side view of a heat sink provided in an embodiment of the present invention.
[0033] Figure label:
[0034] Substrate 100; Heat sink 200; Connecting body 210; Heat dissipation fins 220; Air duct 230; Fan 300; Component module 400; Power device silicon bridge 410; Rectifier boost diode 420; Filter capacitor 430; Insulated gate bipolar transistor 440; Control circuit module 450; Switching power supply circuit module 460; Printed circuit board 470; Electrolytic capacitor 480. Detailed Implementation
[0035] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0041] See Figures 1 to 3 This utility model provides a circuit board assembly for a battery welding machine. The circuit board assembly includes a substrate 100, multiple heat sinks 200, a fan 300, and component modules 400. The multiple heat sinks 200 are divided into two groups, and the two groups of heat sinks 200 are spaced apart along a first direction. Each group of heat sinks 200 includes at least one heat sink 200, and each heat sink 200 has at least one air groove 230 extending along a second direction. The fan 300 is disposed on the substrate 100 and located at one end of the substrate 100 along the second direction. The air outlet of the fan 300 is connected to the air groove 230 to form an air passage. The component modules 400 include multiple components, some of which are disposed on the heat sinks 200 and some of which are disposed on the side of the heat sinks 200. The first direction and the second direction intersect.
[0042] This invention provides a circuit board assembly for a battery welding machine. A substrate 100 connects and supports a heat sink 200, a fan 300, and component modules 400, forming a circuit between the components to achieve the relevant functions of each component module 400. Two sets of heat sinks 200 are provided on the substrate 100, each set including at least one heat sink 200, and air grooves 230 extending along a second direction are provided on the heat sinks 200. A fan 300 is provided on the substrate 100, positioned at one end of the substrate 100 along the second direction, and its outlet is connected to the air groove 230, forming an air passage. When the fan 300 blows air, the air flows into the air groove 230 on the heat sink 200, thereby reducing the temperature of the heat sink 200. The heat sink 200 can exchange heat with the surrounding environment and components, thus dissipating heat from each component. By placing the component modules 400 on or beside the heat sink 200, heat exchange can be achieved between the component modules 400 and the heat sink 200. This structural arrangement improves the heat dissipation performance of high-power devices by placing them on or beside the heat sink 200, thereby increasing the load rate of the welding machine and improving its overall performance.
[0043] It should be noted that the substrate 100 is a rectangular or square plate structure. In this embodiment, the first direction is as follows: Figure 1 The vertical direction is shown, and the second direction is as follows. Figure 1 The left and right directions are shown. The explanations of the first and second directions are only for the convenience of understanding the technical solution and do not limit the scope of protection of this application.
[0044] In this embodiment, the substrate 100 is a copper-clad laminate. Specifically, the substrate 100 is a sheet material made by impregnating a reinforcing material with a numerical adhesive, drying, cutting, stacking into a blank, then covering it with copper foil, using a steel plate as a mold, and forming it under high temperature and high pressure in a hot press.
[0045] Specifically, the heat sink 200 is a component with a large surface area made of thermally conductive metal. The heat sink 200 is typically attached to the substrate 100 and is used to absorb and dissipate heat. Heat is transferred from high thermal resistance areas to low thermal resistance areas, and from high-heat areas to low-heat areas, thereby achieving heat dissipation for the circuit board assembly.
[0046] like Figure 1 and Figure 2As shown, in some embodiments, each group of heat sinks 200 includes at least two heat sinks 200, and the heat sinks 200 in each group are spaced apart along a second direction. There is no limitation on the number of heat sinks 200 in each group; it can be one or two. In this embodiment, each group of heat sinks 200 includes two heat sinks 200 spaced apart along the second direction. This helps to increase the heat dissipation area of the heat sinks 200 in the circuit board assembly for the battery welding machine, thereby further improving the heat dissipation effect. Furthermore, the heat sinks 200 in the two groups of heat sinks 200 are arranged opposite each other.
[0047] like Figure 3 As shown, in some embodiments, each radiator 200 includes a connecting body 210 and heat dissipation fins 220. Multiple heat dissipation fins 220 are connected to the connecting body 210 and are spaced apart. The gap between two adjacent heat dissipation fins 220 forms an air groove 230. Further, the openings of the air grooves 230 of two opposing radiators 200 in the two sets of radiators 200 are arranged opposite each other.
[0048] The connecting body 210 is used to connect the heat dissipation fins 220. By providing multiple spaced heat dissipation fins 220 on the connecting body 210, the heat dissipation area of the radiator 200 is increased. Air grooves 230 are formed through the gaps between two adjacent heat dissipation fins 220. By providing multiple heat dissipation fins 220, a radiator 200 has multiple air grooves 230, thereby increasing the flow area of cooling air and improving the heat dissipation effect of the radiator 200.
[0049] In this embodiment, the connecting body 210 is a plate-like structure, and the heat dissipation fins 220 are connected to the side of the plate-like connecting body 210. To further increase the heat dissipation area of the radiator 200, the side of the heat dissipation fins 220 is made into a corrugated surface, thereby increasing the heat dissipation area of the heat dissipation fins 220. Multiple heat dissipation fins 220 are arranged in parallel.
[0050] The slots of the air grooves 230 of the two radiators 200 in the two sets are arranged opposite each other so that most of the air blown out from the fan 300 can flow into the air grooves 230 of the two sets of radiators 200, thereby effectively utilizing the wind energy of the fan 300.
[0051] like Figure 1 and Figure 2 As shown, in some embodiments, the component module 400 includes a power factor correction component. The power factor correction (PFC) module includes a power device silicon bridge 410 and a rectifier boost diode 420. The power device silicon bridge 410 and the rectifier boost diode 420 are both disposed on the heat sink 200. The power device silicon bridge 410 and the rectifier boost diode 420 disposed on the same heat sink 200 are spaced apart.
[0052] Specifically, a PFC module includes a PFC inductor module and a PFC circuit module. The PFC inductor typically functions in inductor-compensated PFC circuits and active PFC circuits, storing energy for the PFC boost circuit and primarily acting as a rectifier. In inductor-compensated PFC circuits, i.e., active PFC circuits, the PFC inductor works in conjunction with other components to reduce the phase difference between the fundamental current and voltage of the AC input. The PFC inductor functions as both a rectifier and a filter.
[0053] Specifically, the substrate 100 has a front end and a rear end along a first direction, and a head end and a tail end along a second direction. In this embodiment, for ease of connection, it is as follows... Figure 1 As shown, the upper part of the substrate 100 is defined as the rear end, and the lower part is defined as the front end; the left end of the substrate 100 is defined as the first end, and the right end is defined as the tail end.
[0054] Specifically, in this embodiment, the PFC inductor includes a power device silicon bridge 410 and a rectifier boost diode 420. The rectifier boost diode 420 is disposed on a heat sink 200 located at the rear end of a set of heat sinks. Specifically, the rectifier boost diode 420 is disposed on the side of the connection body 210 of the heat sink 200 away from the heat dissipation fins 220. The power device silicon bridge 410 can be disposed on the connection body 210 or on the side of the heat sink 200. As a preferred embodiment, the power device silicon bridge 410 is disposed on the connection body 210.
[0055] like Figure 1 and Figure 2 As shown, in some embodiments, the component module 400 includes a filter capacitor 430 disposed on the substrate 100 and located between two sets of heat sinks 200.
[0056] Specifically, multiple electrolytic capacitors 480 are installed in the gap between the two sets of heat sinks 200, and a filter capacitor 430 is located between the electrolytic capacitor 480 at the very end and the fan 300. The filter capacitor 430 is used to reduce the AC ripple coefficient and improve the efficiency and smoothness of the DC output. The filter capacitor 430 not only makes the DC output of the power supply smooth and stable, reducing the impact of alternating pulsating current on the electronic circuit, but also absorbs the current fluctuations generated during the operation of the electronic circuit and the interference introduced through the AC power supply, making the operating performance of the electronic circuit more stable.
[0057] like Figure 1 and Figure 2As shown, in some embodiments, the component module 400 includes an inverter module comprising a plurality of insulated-gate bipolar transistors (IGBTs) 440. Each pair of IGBTs 440 is positioned beside a heat sink 200, on the side of the heat sink 200 facing away from the air vent 230. By arranging the plurality of IGBTs 440 beside the heat sink 200, the heat dissipation performance of the IGBTs 440 is improved. The use of IGBTs 440 in circuit board assemblies for battery welding machines offers advantages such as high input impedance, high switching speed, and low on-resistance even under high voltage conditions.
[0058] Specifically, two spaced-apart insulated gate bipolar transistors (IGBTs) 440 are provided on both the two heat sinks 200 at the front end and on the side of the heat sink 200 at the rear end. Of course, the IGBTs 440 can also be attached to the heat sinks 200 to improve heat dissipation.
[0059] like Figure 1 and Figure 2 As shown, in some embodiments, the substrate 100 has a front end and a rear end along a first direction, and a head end and a tail end along a second direction. The component module 400 also includes a control circuit module 450, which is located at the intersection of the front end and the head end of the substrate 100.
[0060] By arranging the control circuit module 450 at the front end of the substrate 100, the main advantages are improved circuit layout, minimal interference from other components, and easier wiring. It should be noted that in this embodiment, the control circuit module 450 is positioned beside the printed circuit board 470, and the rounded edge and secondary edge of the printed circuit board 470 have a clear boundary, thus meeting safety spacing requirements. Furthermore, the printed circuit board 470 has terminals for easy wiring to the control circuit module 450.
[0061] like Figure 1 and Figure 2 As shown, in some embodiments, the component module 400 further includes a switching power supply circuit module 460, which is located at the middle of the rear end of the substrate 100. Positioning the switching power supply circuit module 460 at the rear end of the printed circuit board 470 on the substrate 100 provides a DC voltage of 24V±15V to power the control circuit module 450. This placement of the switching power supply circuit module 460 facilitates the safety spacing distribution of the components. The switching power supply circuit module 460 includes a switching power supply transformer, a main power supply relay, etc.
[0062] One embodiment of this utility model also provides a welding machine, which includes the circuit board assembly for battery welding as described above.
[0063] By applying the aforementioned circuit board assembly for battery welding machines to welding machines, the heat dissipation performance of high-power devices can be improved by placing them on or beside the heat sink 200, thereby increasing the load rate of the welding machine and improving its performance.
[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0065] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A circuit board assembly for a battery welding machine, characterized in that, The circuit board assembly for the battery welding machine includes: substrate; Multiple radiators are divided into two groups, and the two groups of radiators are spaced apart along a first direction. Each group of radiators includes at least one radiator, and each radiator is provided with at least one air groove extending along a second direction. A fan is disposed on the substrate and located at one end of the substrate along the second direction. The air outlet of the fan is connected to the air groove to form an air passage. The component module includes multiple components, some of which are located on the heat sink and some of which are located on the side of the heat sink. The first direction and the second direction intersect.
2. The circuit board assembly for a battery welding machine according to claim 1, characterized in that, Each group of heat sinks includes at least two heat sinks, and the heat sinks in each group are spaced apart along the second direction.
3. The circuit board assembly for a battery welding machine according to claim 2, characterized in that, The component module includes a power factor correction component, which includes: A power device silicon bridge is disposed on the heat sink; A rectifier boost diode is disposed on the heat sink; The power device silicon bridge and the rectifier boost diode, which are located on the same heat sink, are spaced apart.
4. The circuit board assembly for a battery welding machine according to claim 2, characterized in that, The component module includes: A filter capacitor is disposed on the substrate and located between the two sets of heat sinks.
5. The circuit board assembly for a battery welding machine according to claim 2, characterized in that, The component module includes an inverter module, which includes: Multiple insulated gate bipolar transistors are provided, with every two insulated gate bipolar transistors located beside one of the heat sinks and on the side of the heat sink away from the air groove.
6. The circuit board assembly for a battery welding machine according to claim 2, characterized in that, The substrate has a front end and a rear end along the first direction, and a head end and a tail end along the second direction. The component module further includes: A control circuit module is located at the intersection of the front end and the first end of the substrate.
7. The circuit board assembly for a battery welding machine according to claim 6, characterized in that, The component module also includes: A switching power supply circuit module is located at the middle of the rear end of the substrate.
8. The circuit board assembly for a battery welding machine according to any one of claims 1-7, characterized in that, Each of the aforementioned heat sinks includes: Connecting main body; A plurality of heat dissipation fins are connected to the connecting body, and the plurality of heat dissipation fins are spaced apart, with the gap between two adjacent heat dissipation fins forming the air groove.
9. The circuit board assembly for a battery welding machine according to claim 8, characterized in that, The slots of the air grooves of the two opposite radiators in the two sets of radiators are arranged opposite each other.
10. A welding machine, characterized in that, The welding machine includes a circuit board assembly for a battery welding machine as described in any one of claims 1-9.