Power module and vehicle-mounted charger

Abstract

The utility model discloses a power module and a vehicle-mounted charger. The utility model provides a power module, one side of the power module is a signal side provided with a plurality of signal terminals, the other side of the power module is a power side, and the power side is provided with a plurality of groups of power terminal assemblies at intervals. The distances between the connecting ends, used for being connected with other modules, of any two adjacent signal terminals on the signal side of the power module and the signal side are different, so that when the connecting ends of the signal terminals are welded, each terminal can be conveniently and independently welded, and the technical problems that in the prior art, the terminals of the power module do not meet the insulation safety regulation, and wiring of a control panel is affected can be solved. The connecting ends of the power terminals of the multiple groups of power terminal assemblies are arranged in parallel and level, and the power terminals of the same group of power terminal assemblies are simultaneously welded with one point of the circuit board, so that the welding strength can be improved, and large current can be borne.

Description

Technical Field

[0001] The utility model relates to the field of power modules, in particular to a power module and a vehicle-mounted charger. Background Art

[0002] With growing global awareness of environmental protection and the shift in energy mix, electric vehicles (EVs), a key solution for reducing carbon emissions and promoting green mobility, are experiencing unprecedented market demand. As a key component of EVs, the performance and efficiency of the on-board charger (OBC) directly impacts charging speed, range, and user experience. Therefore, improving the technical level and overall performance of OBCs has become a key focus of EV technology research and development.

[0003] In OBC design, the power module, as a core component, undertakes the critical task of DC-to-AC (DC-AC) or AC-to-DC conversion, and is a key link in achieving battery charging and energy regeneration. Traditional OBC designs often use discrete components to construct power conversion circuits. Although this design approach is highly flexible, it gradually reveals its limitations when faced with the stringent requirements of modern electric vehicle technology, such as high power and miniaturization.

[0004] To overcome the shortcomings of traditional discrete device structures, highly integrated power modules are becoming a new trend in OBC design. Integrated power modules achieve a high degree of integration and modularity by encapsulating multiple functional units within a compact package. However, existing power modules often have their terminals aligned horizontally. This can easily lead to adjacent signal terminals being welded together during soldering, potentially violating insulation safety regulations. Alternatively, the terminals of existing power modules are staggered, complicating control board wiring and impacting layout. Utility Model Content

[0005] In order to solve the technical problem that the terminals of the power module in the prior art do not comply with the insulation safety regulations and affect the wiring of the control board, the present invention provides a power module and an on-board charger.

[0006] The technical solution adopted in this utility model is:

[0007] The utility model proposes a power module, which includes a signal side and a power side. The power side is provided with at least one group of power terminal assemblies, and the signal side is provided with at least one signal terminal. The utility model is characterized in that the signal connection ends of any two adjacent signal terminals for connecting to other modules are at different distances from the signal side, and the power connection ends of the power terminal assembly for connecting to other modules are at the same distance from the power side.

[0008] Furthermore, each group of the power terminal assemblies includes at least one power terminal.

[0009] Furthermore, each group of the power terminal assemblies includes two power terminals, and the two power terminals are both positive power terminals or both negative power terminals.

[0010] Furthermore, the intervals between adjacent power terminal assemblies are greater than the intervals between adjacent power terminals in the same group.

[0011] Furthermore, the power terminals of the plurality of groups of the power terminal assemblies are at the same distance from the power connection ends for connecting to other modules and the power side.

[0012] Furthermore, the NTC thermistor signal acquisition pin of the power module is arranged on the signal side and is located at one end of the signal side.

[0013] Furthermore, a group of power terminal assemblies is provided at the other end of the signal side of the power module, and the power terminal assembly located on the signal side includes two power terminals, and the signal connection ends of the two power terminals for connecting to other modules are at different distances from the signal side.

[0014] Furthermore, the power module has positioning protrusions on the back, and the interface for installing the power module has concave points corresponding to the positioning protrusions, or the power module has positioning concave points on the back, and the interface for installing the power module has protrusions corresponding to the positioning concave points.

[0015] The present invention also provides an on-vehicle charger, comprising any one of the power modules described above.

[0016] Compared with the prior art, the present invention proposes a power module, wherein one side of the power module is a signal side provided with a plurality of signal terminals, and the other side is a power side, and a plurality of groups of power terminal assemblies are spaced apart on the power side. The connection ends of any two adjacent signal terminals on the signal side of the power module for connecting to other modules are at different distances from the signal side, so that when welding the signal terminal connection ends, it is convenient to weld each terminal separately, and it can avoid welding two adjacent signal terminals together, resulting in non-compliance with insulation safety regulations. The power terminal connection ends of multiple groups of power terminal assemblies are arranged flush, and the power terminals of the same group of power terminal assemblies are welded to a point on the circuit board at the same time, which can increase the welding strength, withstand large currents, optimize the circuit board layout, and save space. The interval between adjacent power terminal assemblies is greater than the interval between adjacent power terminals in the same group, so as to prevent the power terminals of one group of power terminal assemblies from being welded together with the power terminals of the adjacent power terminal assemblies during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 A top view of the pin definition and design scheme of an embodiment of the utility model;

[0019] Figure 2 A bottom view of the pin definition and design scheme of an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the power module according to an embodiment of the utility model;

[0021] 1. Power side; 2. Signal side; 3. NTC thermistor signal acquisition pin; 4. Power module; 5. Power terminal; 6. Signal terminal; 51. Power terminal assembly; 7. Positioning bump. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0024] Integrated power modules achieve a high degree of integration and modular design by encapsulating multiple functional units within a compact package. However, existing power modules often have signal terminal connections arranged on the same horizontal plane. This can easily lead to adjacent signal terminals being welded together during soldering, resulting in non-compliance with insulation safety regulations. Alternatively, the terminals of existing power modules are staggered, complicating control board wiring and impacting layout.

[0025] like Figure 1-3As shown, the present invention proposes a power module, wherein one side of the power module 4 is a signal side 2, which is provided with multiple signal terminals 6, with spaces between the multiple signal terminals 6. The other side of the power module 4 is a power side 1, provided with multiple groups of power terminal assemblies 51, with spaces between the multiple groups of power terminal assemblies 51. The power connection ends of the power terminal assemblies 51, used for connecting to other modules, are at the same distance from the power side 1. Each group of power terminal assemblies 51 includes at least one power terminal 5, and the spacing between adjacent power terminal assemblies 51 is greater than the spacing between adjacent power terminals 5 within the same group. Any two adjacent signal terminals 6 on the signal side 2 of the power module 4 have different connection ends from the signal side 2, meaning that the two adjacent signal terminals 6 are staggered. This facilitates soldering each signal terminal 6 individually when soldering the connection ends, avoiding welding two adjacent signal terminals 6 together, which would violate insulation safety regulations. Furthermore, the staggered design of the terminals of the power module 4 would complicate control board wiring and affect layout. The spacing between adjacent power terminal assemblies 51 is greater than the spacing between adjacent power terminals 5 within the same group. When welding, the power terminals of one group of power terminal assemblies 51 will not be welded together with the power terminals 5 of the adjacent power terminal assemblies 51 .

[0026] Other modules may be other signal boards or chips or other circuits, etc.

[0027] Preferably, the distances between each of the multiple signal terminals 6 on the signal side 2 and the signal side are the same. For example, the signal side 2 is provided with a first signal terminal, a second signal terminal, a third signal terminal, a fourth signal terminal, and a fifth signal terminal, in sequence. The first signal terminal, the third signal terminal, and the fifth signal terminal are all at the same distance from the signal side 5, which is a first distance. The third signal terminal and the fourth signal terminal are also at the same distance from the signal side 5, which is a second distance. The first and second distances are not equal.

[0028] Each power terminal assembly 51 includes two power terminals 5, both of which are positive power terminals or negative power terminals. When welding, the two power terminals 5 of a power terminal assembly 51 are welded together and then welded to the potential of the circuit board.

[0029] In this embodiment, each group of power terminal components 51 on the power side includes two power terminals 5, and the two power terminals 5 are both positive power terminals. The connection ends of the two power terminals 5 are arranged flush to facilitate welding and routing, and the two power terminals 5 of the power terminal component 51 are welded to the same device at the same time, which increases the welding strength and can withstand larger currents.

[0030] In a further embodiment, the NTC thermistor signal acquisition pin 3 of the power module 4 is located on the signal side 2 at one end of the signal side 2. The signal pin is the output terminal of the NTC thermistor and is used to output an electrical signal related to temperature changes. When the ambient temperature changes, the resistance value of the NTC thermistor changes accordingly, resulting in changes in the current passing through the resistor or the voltage across its terminals. This changing electrical signal is the temperature signal to be collected.

[0031] In the present invention, the power terminal components can all be placed on the power side, but sufficient space is required for internal wiring on the power side. Considering the internal wiring problem, one or more groups of power terminal components 51 can also be set on the signal side away from the NTC thermistor signal acquisition pin 3.

[0032] In a further embodiment, the power connection ends of the power terminals 5 of the multiple groups of power terminal assemblies 51 for connecting to other modules are at the same distance from the power side 1 .

[0033] In a further embodiment, a power terminal assembly 51 is further provided at the right end of the signal side 2 of the power module 4. The power terminal assembly 51 on the right end of the signal side 2 of the power module 4 includes two power terminals 5, both of which are negative power terminals. The NTC thermistor signal acquisition pin 3 of the power module 4 is located on the signal side 2 and at the left end of the signal side 2, away from the power terminal assembly 51 on the right end and the power terminals 5 on the power side 1. This minimizes the impact of power-side heating and reduces interference from high-current signals from the power terminals 5. The power terminal assembly on the signal side includes two power terminals 5, which are staggered to facilitate processing with the staggered signal terminals 6.

[0034] In a further embodiment, a positioning protrusion 7 is provided on the back of the power module 4, and a positioning recess corresponding to the positioning protrusion 7 is provided on the interface for installing the power module 4, or a positioning recess is provided on the back of the power module 4, and a positioning protrusion 7 corresponding to the positioning recess is provided on the interface for installing the power module, which is used to limit the position of the power module and can play a role in positioning and error prevention. The positioning protrusion 7 or positioning recess can be of different shapes; the positioning recess or positioning protrusion 7 can also be provided in any one, two, or three of the upper left, lower left, upper right, or lower right locations; the positioning protrusion 7 can also be increased near the upper left, lower left, upper right, or lower right, or the positioning protrusion can be reduced to achieve error prevention and positioning.

[0035] The present invention also provides an on-vehicle charger, comprising the aforementioned power module.

[0036] Compared with the prior art, the present invention proposes a power module, wherein one side of the power module is a signal side provided with a plurality of signal terminals, and the other side is a power side, and a plurality of groups of power terminal assemblies are spaced apart on the power side. The connection ends of any two adjacent signal terminals on the signal side of the power module for connecting to other modules are at different distances from the signal side, so that when welding the signal terminal connection ends, it is convenient to weld each terminal separately, which can avoid the technical problem that the terminals of the power module in the prior art do not meet the insulation safety regulations and affect the wiring of the control board. The power terminal connection ends of the multiple groups of power terminal assemblies are arranged flush, and the power terminals of the same group of power terminal assemblies are welded to a point on the circuit board at the same time, which can increase the welding strength, withstand large currents, and optimize the circuit layout. The interval between adjacent power terminal assemblies is greater than the interval between adjacent power terminals in the same group, which prevents the power terminals of one group of power terminal assemblies from being welded together with the power terminals of the adjacent power terminal assemblies during welding.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A power module, comprising a signal side and a power side, wherein the power side is provided with at least one set of power terminal assemblies, and the signal side is provided with at least one signal terminal, characterized in that: The distances between the signal connection ends of any two adjacent signal terminals for connecting to other modules and the signal side are different, and the distances between the power connection ends of the power terminal assembly for connecting to other modules and the power side are the same.

2. The power module according to claim 1, wherein: Each group of the power terminal assemblies includes at least one power terminal.

3. The power module according to claim 2, wherein: Each group of the power terminal assemblies includes two power terminals, and the two power terminals are both positive power terminals or both negative power terminals.

4. The power module according to claim 3, wherein: The spacing between adjacent power terminal assemblies is greater than the spacing between adjacent power terminals in the same group.

5. The power module according to claim 2, wherein: The power terminals of the plurality of groups of the power terminal assemblies are used to connect to other modules and have the same distance from the power side.

6. The power module according to claim 1, wherein: The NTC thermistor signal acquisition pin of the power module is arranged on the signal side and is located at one end of the signal side.

7. The power module according to claim 6, wherein: A group of power terminal components is provided at the other end of the signal side of the power module, and the power terminal component located on the signal side includes two power terminals. The signal connection ends of the two power terminals for connecting to other modules are at different distances from the signal side.

8. The power module according to claim 1, wherein: The power module is provided with a positioning protrusion on the back, and a positioning concave point corresponding to the positioning protrusion is provided on the interface for installing the power module, or the power module is provided with a positioning concave point on the back, and a positioning protrusion corresponding to the positioning concave point is provided on the interface for installing the power module.

9. A vehicle-mounted charger, characterized in that: The power module comprises the power module according to any one of claims 1 to 8.

Images