Power module and on-board charger

Abstract

Disclosed in the present utility model are a power module and an on-board charger. With respect to the power module provided in the present utility model, one side of the power module serves as a signal side and is provided with a plurality of signal terminals, and the other side serves as a power side, the power side being provided with a plurality of power terminal assemblies at intervals. For any two adjacent signal terminals at the signal side of the power module, connection ends thereof that are used for connecting to other modules have different distances from the signal side, so that during soldering of the connection ends of the signal terminals, independent soldering of each terminal can be facilitated, thereby avoiding the technical problems in the prior art that terminals of power modules fail to meet insulation safety standards and affect control board wiring. Connection ends of power terminals of the plurality of power terminal assemblies are arranged to be flush, and the power terminals of a same power terminal assembly are simultaneously soldered to one point on a circuit board, thereby improving soldering strength and allowing same to withstand high currents.

Description

Power module and on-board charger TECHNICAL FIELD

[0001] The utility model relates to the field of power module, in particular to a power module and on-board charger. BACKGROUND

[0002] With the enhancement of global environmental protection consciousness and the transformation of energy structure, electric vehicles (EVs) as an important solution to reduce carbon emissions and promote green travel, its market demand is growing at an unprecedented speed. As one of the key components of electric vehicles, the performance and efficiency of on-board charger (OBC) directly affect the charging speed, range and user experience of electric vehicles. Therefore, improving the technical level and comprehensive performance of OBC has become an important direction of electric vehicle technology research and development.

[0003] In the design of OBC, power module as the core component, undertakes the key task of direct current to alternating current (DC-AC) or alternating current to direct current (AC-DC) conversion, is the key link to realize battery charging and energy feedback. The traditional OBC design often uses discrete devices to build power conversion circuit, although this design method has high flexibility, but when facing the strict requirements of modern electric vehicle technology such as high power and miniaturization, its limitations gradually appear.

[0004] In order to overcome the shortcomings of traditional discrete device structure, high integration power module gradually becomes a new trend of OBC design. Integrated power module realizes high integration and modular design by packaging multiple functional units in a compact package. However, the connection ends of the terminals of the existing power module are arranged on the same horizontal plane, which is easy to weld two adjacent signal terminals together during welding, resulting in non-compliance with insulation safety regulations. Or the terminals of the existing power module are staggered designed, which leads to complex control board wiring and affects the layout. SUMMARY

[0005] The utility model discloses in order to solve the technical problem of terminal of above-mentioned prior art power module not meeting insulation safety regulations and affecting control board wiring, propose a kind of power module and on-board charger.

[0006] The technical scheme adopted by the utility model is:

[0007] The utility model provides a kind of power module, the power module includes signal side and power side, the power side is equipped with at least one group of power terminal assembly, the signal side is equipped with at least one signal terminal, it is characterized in that, any adjacent two the signal terminal for the signal connection end of being connected with other module is different from the distance of signal side, the power terminal assembly is connected with the power connection end of other module and the distance of power side is same.

[0008] Further, each group of the power terminal assembly includes at least one power terminal.

[0009] Further, each group of the power terminal assembly includes two power terminals, both of which are positive power terminals or both are negative power terminals.

[0010] Further, the interval between adjacent power terminal assemblies is greater than the interval between adjacent power terminals in the same group.

[0011] Further, the power terminals of multiple groups of the power terminal assembly have the same distance to the power side for power connection.

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

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

[0014] Further, the back of the power module is provided with a positioning convex point, and the interface for installing the power module is provided with a concave point corresponding to the positioning convex point, or the back of the power module is provided with a positioning concave point, and the interface for installing the power module is provided with a convex point corresponding to the positioning concave point.

[0015] The utility model further provides a kind of vehicle-mounted charger, including any one power module described.

[0016] Compared with the prior art, the utility model discloses a kind of power module, the side of power module is signal side and is equipped with multiple signal terminals, the other side is power side, and power side is spaced and is equipped with multiple groups of power terminal assembly.Power module signal side's any two adjacent signal terminals are used to connect the distance of the connecting end of other module, and the distance of signal side is different, so that when signal terminal connecting end is welded, it is convenient to weld each terminal separately, can avoid welding adjacent two signal terminals together, lead to not meet the condition of insulation safety regulations.Multiple groups of power terminal assembly power terminal connecting end flush setting, the power terminal of same group of power terminal assembly is welded with the point of circuit board simultaneously, can increase welding strength, bear large current, optimize circuit board layout, save space.The interval between adjacent power terminal assembly is greater than the interval between adjacent power terminals in the same group, to prevent the power terminal of a group of power terminal assembly from being welded together with the power terminal of its adjacent power terminal assembly when welding. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor intensity.

[0018] Fig. 1 is the top view of the pin definition and design scheme of the embodiment of the utility model;

[0019] Fig. 2 is the bottom view of the pin definition and design scheme of the embodiment of the utility model;

[0020] Fig. 3 is the three-dimensional structural schematic diagram of the power module of the 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 problem, technical scheme and beneficial effect to be solved by the utility model more clearly, the following combines with the drawings and embodiment, and the utility model is further explained in detail.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0023] The principle and structure of the utility model will be described in detail in combination with the drawings and embodiments.

[0024] The integrated power module realizes high integration and modular design by packaging multiple functional units in a compact package. However, the connection ends of the signal terminals of the existing power module are arranged on the same horizontal plane, and when welding, the adjacent two signal terminals are easily welded together, thereby causing non-compliance with insulation safety regulations; or the terminals of the existing power module are staggered, causing complex control board wiring and affecting layout.

[0025] As shown in FIGS. 1-3, the utility model provides a kind of power module, one side of power module 4 is signal side 2, signal side 2 is equipped with multiple signal terminals 6, and multiple signal terminals 6 are equipped with interval. The other side of power module 4 is power side 1 and is equipped with multiple groups of power terminal assembly 51, and multiple groups of power terminal assembly 51 are mutually equipped with interval, and the distance of power terminal assembly 51 for the power connection end connected with other module and power side 1 is same, and each group of power terminal assembly 51 includes at least one power terminal 5, and the interval between adjacent power terminal assembly 51 is greater than the interval between adjacent power terminal 5 in the same group. The distance of the connection end of any adjacent two signal terminals 6 of power module 4 signal side 2 for connecting with other module and signal side 2 is different, that is, the two adjacent signal terminals 6 are staggered, and when signal terminal 6 connection end is welded, each signal terminal 6 is welded separately, and the adjacent two signal terminals 6 can be welded together, to avoid the situation that does not comply with insulation safety regulations, and the terminals of power module 4 are staggered, causing complex control board wiring and affecting layout. The interval between adjacent power terminal assembly 51 is greater than the interval between adjacent power terminal 5 in the same group. The power terminal of a group of power terminal assembly 51 is not welded together with the power terminal 5 of its adjacent power terminal assembly 51 when welding.

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

[0027] Preferably, the distance of multiple signal terminals 6 of signal side 2 to signal side is same every interval one signal terminal 6. For example: signal side 2 is equipped with first signal terminal, second signal terminal, third signal terminal, fourth signal terminal, fifth signal terminal in turn, wherein the distance of first signal terminal, third signal terminal, fifth signal terminal to signal side 5 is same as first distance, the distance of third signal terminal and fourth signal terminal to signal side 5 is same as second distance, and first distance and second distance are not equal.

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

[0029] In the embodiment, each group of power terminal assembly 51 on the power side includes two power terminals 5, both of which are positive power terminals. The connecting ends of the two power terminals 5 are arranged flush to facilitate welding and wiring. Moreover, the two power terminals 5 of the power terminal assembly 51 are simultaneously welded with the same device, thereby increasing the welding strength and bearing greater current.

[0030] In a further embodiment, the NTC thermistor signal acquisition pin 3 of the power module 4 is arranged on the signal side 2 and located at one end of the signal side 2. The signal pin is the output end of the NTC thermistor and is used to output an electrical signal related to temperature change. When the ambient temperature changes, the resistance value of the NTC thermistor changes accordingly, thereby causing the current passing through the resistance or the voltage across the resistance to change. This changed electrical signal is the temperature signal that needs to be collected.

[0031] In the present application, the power terminal assembly can be placed on the power side. However, the internal wiring of the power side requires sufficient space. Therefore, considering the internal wiring problem, one group or multiple groups of power terminal assemblies 51 can be arranged on the signal side away from the NTC thermistor signal acquisition pin 3.

[0032] In a further embodiment, the power terminals 5 of the multiple groups of power terminal assemblies 51 are used for power connection ends connected with other modules and have the same distance from the power side 1.

[0033] In a further embodiment, the right end of the signal side 2 of the power module 4 is further provided with a group of power terminal assemblies 51. The power terminal assembly 51 located at 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 arranged on the signal side 2 and located at the left end of the signal side 2, away from the power terminal assembly 51 at the right end and the power terminals 5 of the power side 1, so as to minimize the influence of heat generated by the power side and reduce the interference of the large current signal of the power terminal 5. The power terminal assembly arranged 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, the back of the power module 4 is provided with a positioning protrusion 7. The interface for installing the power module 4 is provided with a corresponding positioning recess, or the back of the power module 4 is provided with a positioning recess, and the interface for installing the power module is provided with a corresponding positioning protrusion 7. The positioning protrusion 7 or the positioning recess can be of different shapes. The positioning recess or the positioning protrusion 7 can be arranged at any one or two or three of the upper left, lower left, upper right, and lower right. The positioning protrusion 7 can be added or the positioning protrusion can be reduced near the upper left or lower left or upper right or lower right to prevent errors and positioning.

[0035] The utility model also provides a vehicle-mounted charger, including preceding power module.

[0036] Compared with the prior art, the utility model discloses a kind of power module, the side of power module is signal side and is equipped with multiple signal terminals, the other side is power side, and multiple groups of power terminal assembly are arranged at power side interval.Power module signal side any two adjacent signal terminals are used to connect the distance of the connecting end of other module with signal side, so that it is convenient for each terminal to be welded separately when signal terminal connecting end is welded, and the technical problem that terminal of prior art power module does not meet insulation safety and affects control panel wiring can be avoided.Multiple groups of power terminal assembly power terminal connecting end flush setting, and the power terminal of same group power terminal assembly is welded with the point of circuit board simultaneously, can increase welding strength, withstand large current, optimize circuit layout.The interval between adjacent power terminal assembly is greater than the interval between adjacent power terminals in same group, to prevent the power terminal of a group of power terminal assembly from being welded together with the power terminal of its adjacent power terminal assembly when welding.

[0037] The above only is the preferred embodiment of the utility model and does not limit the utility model, and the utility model can have various changes and changes for the person skilled in the art, and any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A power module comprising a signal side and a power side, the power side being provided with at least one set of power terminal assemblies, the signal side being provided with at least one signal terminal, characterized in that, The distance from the signal connection end of any two adjacent signal terminals to the signal side is different, and the distance from the power connection end of the power terminal assembly to the power side is the same.

2. The power module of claim 1, wherein, Each power terminal assembly includes at least one power terminal.

3. The power module of claim 2, wherein, Each power terminal assembly includes two power terminals, both of which are positive power terminals or both of which are negative power terminals.

4. The power module of claim 3, wherein, The interval between adjacent power terminal assemblies is greater than the interval between adjacent power terminals in the same power terminal assembly.

5. The power module of claim 2, wherein, The distance from the power connection end of the power terminals of the plurality of power terminal assemblies to the power side is the same.

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

7. The power module of claim 6, wherein, The other end of the signal side of the power module is provided with a power terminal assembly, and the power terminal assembly on the signal side includes two power terminals, and the distance from the signal connection end of the two power terminals to the signal side is different.

8. The power module of claim 1, wherein, The back of the power module is provided with a positioning protrusion, and the interface for installing the power module is provided with a positioning recess corresponding to the positioning protrusion, or the back of the power module is provided with a positioning recess, and the interface for installing the power module is provided with a positioning protrusion corresponding to the positioning recess.

9. An on-board charger, characterized by, The power module includes any one of claims 1-8.

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