Hybrid vehicle power module unit structure and hybrid vehicle power module

Abstract

The utility model discloses a power module unit structure of a hybrid electric vehicle, which comprises an HS IGBT, a collector electrode of the HS IGBT is connected with a DC + power terminal, and an emitter electrode of the HS IGBT is connected with a collector electrode of an LS IGBT and an AC power terminal; the two HS Diodes are connected in parallel between the collector electrode and the emitter electrode of the HS IGBT; the emitter of the LS IGBT is connected with the DC-power terminal; the two LS Diodes are connected in parallel between the collector electrode and the emitter electrode of the LS IGBT; wherein the AC power terminal is connected with a load, and the DC-power terminal is connected with the battery pack. The power module unit structure of the hybrid electric vehicle at least can realize the following technical effects; the use amount of one IGBT in one switch is reduced, and the use amount of six IGBTs in one full-bridge power module is reduced, so that the cost is reduced; and the upper switch and the lower switch are allowed to adopt a differentiated Bonding routing mode, so that the stray inductance of the module can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, and in particular to a hybrid automobile power module unit structure and a hybrid automobile power module. Background Art

[0002] The automotive power module is one of the key components in automotive electronic systems. Its main function is to control and convert electrical energy to achieve efficient driving and management of various electrical devices and systems in the car.

[0003] Power modules typically consist of multiple semiconductor devices, such as insulated-gate bipolar transistors (IGBTs) or metal-oxide-semiconductor field-effect transistors (MOSFETs). In electric vehicles, power modules are responsible for converting the direct current (DC) from the battery into alternating current (AC) to drive the electric motor, thus enabling the vehicle to move. Their performance directly impacts the vehicle's power, energy efficiency, and reliability.

[0004] refer to Figure 1 As shown, the existing power module mainly includes a base plate 1, a frame 2, an AC power terminal 7, a DC+ power terminal 8, and a DC- power terminal 9. Each power module unit has two HS IGBTs 3, two LS IGBTs 4, two HS Diodes 5, and two LS Diodes 6. In existing power modules, IGBTs and diodes usually exist in pairs. The diode assumes the function of freewheeling after the IGBT is turned off, and its voltage and current levels are comparable to those of the IGBT.

[0005] Due to its unique powertrain structure, hybrid vehicles mainly have two operating conditions: driving and charging:

[0006] 1. During driving operation, the motor and engine output power at the same time, and the current of the power module load is relatively small.

[0007] 2. During power generation, the current flows in reverse through the diode to charge the battery, and the load current of the power module increases compared to the driving condition.

[0008] If the existing power module layout using IGBTs and diodes in pairs is continued, it will result in a waste of resources. Utility Model Content

[0009] The Summary of the Utility Model introduces a series of simplified concepts, which are simplifications of existing technologies in the field and are further described in detail in the Detailed Description of the Utility Model. The Summary of the Utility Model of this utility model is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0010] The technical problem to be solved by the utility model is to provide a hybrid vehicle power module unit structure and a hybrid vehicle power module which are different from the prior art IGBT and Diode paired arrangement structure.

[0011] To solve the above technical problems, the present invention provides a hybrid vehicle power module unit structure, comprising:

[0012] An HS IGBT, whose collector is connected to the DC+ power terminal and whose emitter is connected to the LS IGBT collector and the AC power terminal;

[0013] Two HSDiodes, connected in parallel between the collector and emitter of the HS IGBT;

[0014] an LS IGBT, the emitter of which is connected to the DC-power terminal;

[0015] Two LSDiodes, connected in parallel between the collector and emitter of the LS IGBT;

[0016] HS IGBT: high-side IGBT, HSDiode: high-side diode, LS IGBT: low-side IGBT, LSDiode: low-side diode;

[0017] Among them, the AC power terminal is connected to the load, and the DC-power terminal is connected to the battery pack.

[0018] Preferably, the hybrid vehicle power module unit structure is further improved, with the AC power terminal side being the upper side and the DC+ power terminal and DC- power terminal side being the lower side;

[0019] The HS IGBT is arranged on the upper left side of the hybrid vehicle power module unit structure substrate;

[0020] Two HSDiodes are arranged vertically on the electric vehicle power module unit structure substrate below the HS IGBT;

[0021] The LS IGBT is arranged on the lower right side of the hybrid vehicle power module unit structure substrate;

[0022] Two LSDiodes are arranged vertically on the electric vehicle power module unit structure substrate above the LS IGBT.

[0023] Preferably, the hybrid vehicle power module unit structure is further improved, and the HS IGBT and the LS IGBT are symmetrical about the geometric center of the hybrid vehicle power module unit structure substrate.

[0024] Preferably, the hybrid vehicle power module unit structure is further improved, and the two HSDiodes and the two LSDiodes are symmetrical about the geometric center of the hybrid vehicle power module unit structure substrate.

[0025] The utility model provides a hybrid vehicle power module, comprising:

[0026] Base plate, upper fixed frame;

[0027] Three hybrid vehicle power module unit structures described in any one of the above items are arranged side by side on the frame.

[0028] This utility model proposes a new layout design scheme to solve the problem of large difference in load current of power modules in hybrid vehicle driving and charging conditions.

[0029] In the same switch, a solution of one IGBT and two diodes is used, taking into account that the load current of the power module in the hybrid vehicle's power generation mode is greater than that in the driving mode;

[0030] In the same half-bridge, the upper and lower switch IGBT wiring adopts different routing directions to reduce stray inductance and increase the utilization rate of the copper-clad substrate.

[0031] The working principle of the hybrid vehicle power module unit structure provided by the utility model is as follows;

[0032] 1. When the hybrid vehicle is in driving condition, the current flows from the DC+ power terminal through the HS IGBT to the AC power terminal to connect to the load. The current is relatively small and is borne by one IGBT.

[0033] 2. When the hybrid vehicle is in power generation mode, the current flows from the AC power terminal through the LS diode to the DC-power terminal to connect to the battery pack. The current is relatively large and is borne by two diodes.

[0034] The hybrid vehicle power module unit structure provided by the present invention can achieve at least the following technical effects:

[0035] 1. Reduce the use of one IGBT in a switch and six IGBTs in a full-bridge power module, thus reducing costs;

[0036] 2. Differentiated bonding methods are allowed for the upper and lower switches (there is no restriction on the bonding method, i.e., allowing differentiated bonding will inevitably reduce stray inductance compared to not allowing differentiated bonding), which can reduce the stray inductance of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings of the present invention are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, the drawings of the present invention are schematic diagrams not drawn to scale and may not accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings of the present invention should not be interpreted as defining or limiting the range of values or properties covered by the exemplary embodiments of the present invention. The present invention is further described in detail below in conjunction with the drawings and specific embodiments:

[0038] Figure 1 This is a schematic diagram of the structure of an existing hybrid vehicle power module.

[0039] Figure 2 This is a schematic diagram of the structure of the power module unit of the hybrid vehicle of the present invention.

[0040] Figure 3 yes Figure 2 Equivalent circuit diagram.

[0041] Figure 4 This is a schematic diagram of the structure of the hybrid vehicle power module of the present utility model.

[0042] Description of Reference Numerals

[0043] Base plate 1

[0044] Frame 2

[0045] HS IGBT 3

[0046] LS IGBT 4

[0047] HSDiode 5

[0048] LSDiode 6

[0049] AC power terminal 7

[0050] DC+ power terminal 8

[0051] DC-power terminal 9

[0052] Control line or sampling line connection terminal 10. DETAILED DESCRIPTION

[0053] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can fully understand the other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. The details in this specification can also be applied based on different viewpoints and various modifications or changes can be made without departing from the overall design concept of the utility model. It should be noted that, unless there is a conflict, the following embodiments and the features therein can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, the element can be directly connected or coupled to the other element, or there can be an intermediate element. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intermediate element. The same figure numbers always represent the same elements throughout the drawings.

[0054] First embodiment;

[0055] refer to Figure 2 As shown, the utility model provides a hybrid vehicle power module unit structure, including:

[0056] An HS IGBT, whose collector is connected to the DC+ power terminal and whose emitter is connected to the LS IGBT collector and the AC power terminal;

[0057] Two HSDiodes, connected in parallel between the collector and emitter of the HS IGBT;

[0058] an LS IGBT, the emitter of which is connected to the DC-power terminal;

[0059] Two LSDiodes, connected in parallel between the collector and emitter of the LS IGBT;

[0060] Among them, the AC power terminal is connected to the load, and the DC-power terminal is connected to the battery pack.

[0061] The equivalent circuit diagram of the first embodiment of the utility model is shown in FIG. Figure 3 shown.

[0062] Furthermore, the layout of the first embodiment can be defined as follows:

[0063] The AC power terminal side is the top, and the DC+ power terminal and DC- power terminal side are the bottom;

[0064] The HS IGBT is arranged on the upper left side of the hybrid vehicle power module unit structure substrate;

[0065] Two HSDiodes are arranged vertically on the electric vehicle power module unit structure substrate below the HS IGBT;

[0066] The LS IGBT is arranged on the lower right side of the hybrid vehicle power module unit structure substrate;

[0067] Two LSDiodes are arranged vertically on the electric vehicle power module unit structure substrate above the LS IGBT.

[0068] Furthermore, the layout of the first embodiment can be defined as follows:

[0069] The HS IGBT and the LS IGBT are symmetrical with respect to the geometric center of the hybrid vehicle power module unit structure substrate, and the two HS Diodes and the two LS Diodes are symmetrical with respect to the geometric center of the hybrid vehicle power module unit structure substrate.

[0070] Second embodiment;

[0071] refer to Figure 4 As shown, the utility model provides a hybrid vehicle power module, comprising:

[0072] Base plate 1, frame 2 fixed on it;

[0073] Three hybrid vehicle power module unit structures described in the first embodiment are arranged side by side on the frame 2 .

[0074] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless expressly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, rather than being interpreted in an ideal or overly formal sense.

[0075] The present invention has been described in detail above through specific implementation methods and examples, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may make many variations and improvements, which should also be considered as the scope of protection of the present invention.

Claims

1. A hybrid vehicle power module unit structure, characterized in that: include: An HS IGBT, whose collector is connected to the DC+ power terminal and whose emitter is connected to the LS IGBT collector and the AC power terminal; Two HSDiodes, connected in parallel between the collector and emitter of the HS IGBT; an LS IGBT, the emitter of which is connected to the DC-power terminal; Two LSDiodes, connected in parallel between the collector and emitter of the LS IGBT; Among them, the AC power terminal is connected to the load, and the DC-power terminal is connected to the battery pack.

2. The hybrid vehicle power module unit structure according to claim 1, wherein: The AC power terminal side is the top, and the DC+ power terminal and DC- power terminal side are the bottom; The HS IGBT is arranged on the upper left side of the hybrid vehicle power module unit structure substrate; Two HSDiodes are arranged vertically on the electric vehicle power module unit structure substrate below the HS IGBT; The LS IGBT is arranged on the lower right side of the hybrid vehicle power module unit structure substrate; Two LSDiodes are arranged vertically on the electric vehicle power module unit structure substrate above the LS IGBT.

3. The hybrid vehicle power module unit structure according to claim 2, wherein: The HS IGBT and LS IGBT are symmetrical about the geometric center of the hybrid vehicle power module unit structure substrate.

4. The hybrid vehicle power module unit structure according to claim 2, wherein: The two HSDiodes and the two LSDiodes are symmetrical about the geometric center of the hybrid vehicle power module unit structure substrate.

5. A hybrid vehicle power module, characterized in that: include: Base plate, upper fixed frame; Three hybrid vehicle power module unit structures according to any one of claims 1 to 4 are arranged side by side on a frame.

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