Capacitor, new energy automobile inverter and new energy automobile
The integration of a heat pipe with the capacitor core in new energy vehicle inverters addresses inefficiencies in heat dissipation, ensuring stable operation and extended lifespan by effectively managing thermal resistance and space constraints.
Patent Information
- Application Number
- CN202421684036.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the prior art, the heat dissipation efficiency of the capacitor is limited by the thickness and material selection of the metal substrate, resulting in an increase in thermal resistance and occupying space, affecting the performance and stability of the inverter of new energy vehicles.
In the inverter of new energy vehicles, heat pipes are used to contact the capacitor core. Through the heat dissipation principle of heat pipes, heat is effectively transmitted and dissipated, reducing thermal resistance and saving space.
It improves the heat dissipation effect of the capacitor, maintains appropriate temperature and stability, extends the reliability and life of the inverter of new energy vehicles, and is suitable for space-constrained designs.
Smart Images
Figure CN223108682U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat dissipation, in particular to a capacitor, a new energy vehicle inverter and a new energy vehicle. Background Art
[0002] The new energy vehicle inverter is one of the crucial components in electric vehicles and hybrid vehicles. Its main function is to convert the direct current (DC) of the vehicle-mounted battery into alternating current (AC) to drive the motor. This process is crucial for the normal operation of the vehicle because the motor usually requires alternating current to operate. Capacitors are installed in the new energy vehicle inverter and play an important role in power conversion and circuit protection. The heat source of the new energy vehicle inverter mainly comes from the copper busbar. When the copper busbar passes through the capacitor, a large amount of heat will be generated inside it. If the temperature of the capacitor is too high, it will bring instability to the performance of the vehicle inverter and even the whole vehicle. Therefore, it is necessary to keep the capacitor at an appropriate temperature under certain conditions.
[0003] In the prior art, one way is to install the capacitor on a metal substrate and use the heat conduction property of the metal substrate to transfer the heat to the surrounding environment.
[0004] In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art: Although the metal substrate has good heat conduction performance, if the thickness and material selection of the substrate itself are improper, a thermal resistance may be formed, reducing the heat dissipation efficiency, and at the same time, it will also occupy more space. Summary of the Utility Model
[0005] The present utility model aims to solve at least one of the technical problems in the related art to a certain extent.
[0006] For this reason, the purpose of the present utility model is to provide a capacitor, a new energy vehicle inverter and a new energy vehicle.
[0007] To achieve the above object, the first aspect of the present utility model provides a capacitor, comprising:
[0008] At least one capacitor core, arranged inside the new energy vehicle inverter;
[0009] A heat pipe, at least a part of which is in contact with at least a part of at least one of the capacitor cores.
[0010] According to an embodiment of the present utility model, the heat pipe comprises an integrally formed evaporation section and a condensation section. The evaporation section is in contact with the capacitor core, and the condensation section is used to be in contact with a cooling component.
[0011] According to an embodiment of the present utility model, the capacitor core is provided with a groove portion, the evaporation section is in a flat plate shape and extends into the groove portion to contact the groove portion, and the condensation section is located outside the capacitor core.
[0012] According to an embodiment of the present utility model, the evaporation section is tubular, and the evaporation section is sleeved on the capacitor core and contacts the side wall of the capacitor core.
[0013] According to an embodiment of the present utility model, the evaporation section and the condensation section are arranged at an angle.
[0014] According to an embodiment of the present utility model, a plurality of the capacitor cores are arranged side by side, and the whole heat pipe is in a flat plate shape and contacts the same side of each capacitor core.
[0015] According to an embodiment of the present utility model, the capacitor core and the heat pipe are connected by means of clamping, welding, bonding or mechanical fixing.
[0016] In a second aspect of the present utility model, a new energy vehicle inverter is proposed, which includes the capacitor described in the first aspect and an inverter housing, and the capacitor is connected to the inverter housing through a heat conduction pad or a heat conduction adhesive.
[0017] In a third aspect of the present utility model, a new energy vehicle is proposed, which includes the new energy vehicle inverter described in the second aspect.
[0018] The technical solution provided by the present utility model may include the following beneficial effects:
[0019] By contacting the heat pipe with the capacitor core, the capacitor of the present utility model is arranged inside the new energy vehicle inverter. Based on the heat dissipation principle of the heat pipe, effective heat transfer and dissipation of the capacitor are realized, thereby improving the heat dissipation effect of the capacitor, maintaining a proper temperature and stability during operation, and enhancing the reliability and service life of the new energy vehicle inverter. The capacitor of the present utility model integrates the heat pipe onto the capacitor core, which can save the space required for additional heat dissipation components and is applicable to situations with limited space or compact designs.
[0020] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings
[0021] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:
[0022] Figure 1 This is a schematic structural diagram of a capacitor proposed in an embodiment of the present utility model.
[0023] Figure 2 This is a schematic diagram of the internal structure of a capacitor related to an embodiment of the present utility model.
[0024] Figure 3 This is a side view of a capacitor proposed in an embodiment of the present utility model.
[0025] Figure 4 This is a schematic structural diagram of a capacitor proposed in another embodiment of the present utility model.
[0026] Figure 5 This is a side view of a capacitor proposed in another embodiment of the present utility model.
[0027] Figure 6 This is a schematic structural diagram of a capacitor proposed in still another embodiment of the present utility model.
[0028] Figure 7 is Figure 6 A schematic structural diagram of a capacitor from another angle of the embodiment.
[0029] Explanation of reference numerals:
[0030] 1 - capacitor core, 2 - heat pipe, 21 - evaporation section, 22 - condensation section. Detailed implementation manners
[0031] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model. On the contrary, the embodiments of the present utility model include all changes, modifications, and equivalents falling within the spirit and scope of the appended claims.
[0032] Next, refer to Figures 1 to 7 , and describe the capacitor according to the embodiment of the present utility model.
[0033] In combination with Figures 1 to 7 As shown, the capacitor according to the embodiment of the present utility model includes at least one capacitor core 1 and a heat pipe 2. The capacitor core 1 is arranged inside the inverter of a new energy vehicle. The heat pipe 2 is also arranged inside the inverter of a new energy vehicle, and at least a part of the heat pipe 2 is in contact with at least a part of at least one capacitor core 1.
[0034] The capacitor core 1 is the core component of the capacitor, which determines the electrical performance of the capacitor. The materials and manufacturing processes of the capacitor core directly affect the performance indicators such as capacitance, withstand voltage, and frequency response. The heat pipe 2 is a passive heat transfer device that works using the phase change heat transfer technology. The interior of the heat pipe is filled with a porous material wick structure, and the internal cavity of the pipe is evacuated to a negative pressure and then filled with a working liquid and sealed. The shape of the heat pipe 2 is not specifically limited and can be made into various shapes to facilitate integration with the capacitor core 1, thereby saving the space required for additional heat dissipation components. The capacitor core 1 and the heat pipe can be connected in contact by means such as clamping, welding, bonding, or mechanical fixing, and the specific connection method is selected according to actual needs and is not limited.
[0035] It should be noted that a capacitor can have one capacitor core 1 or multiple capacitor cores 1 inside. The heat pipe can quickly and effectively transfer heat from the area where the capacitor is located to another area, maintaining the stable operating temperature of the capacitor. When in use, it is necessary to ensure good contact between the heat pipe and the capacitor core and be able to effectively transfer heat to maximize heat conduction and dissipation.
[0036] In the capacitor of the embodiment of the present utility model, by bringing the heat pipe into contact with the capacitor core, and the capacitor core is arranged inside the new energy vehicle inverter, based on the principle of heat dissipation by the heat pipe, effective heat transfer and dissipation of the capacitor are achieved, thereby improving the heat dissipation effect of the capacitor, maintaining an appropriate temperature and stability during the working process, and improving the reliability and lifespan of the new energy vehicle inverter. In the capacitor of the embodiment of the present utility model, the heat pipe is integrated onto the capacitor core, which can save the space required for additional heat dissipation components and is applicable to situations with limited space or compact designs.
[0037] In some embodiments, the heat pipe 2 includes an integrally formed evaporation section 21 and a condensation section 22. The evaporation section 21 is in contact with the capacitor core 1, and the condensation section 22 is used to contact the cooling component. When the evaporation section 21 is heated, the liquid working medium in the wick of this area quickly vaporizes and absorbs heat, converting into steam. The steam flows to the condensation section 22, releases heat, and re-condenses into a liquid. The condensed liquid working medium returns to the evaporation section through the wick under the action of capillary force, and thus the entire heat transfer cycle is completed repeatedly, and the cooling component can dissipate the excess heat to other areas. The cooling component can adopt a liquid cooling pipe or a heat sink.
[0038] In some embodiments, in combination with Figures 1 to 3As shown, the capacitor core 1 is provided with a groove portion. The evaporation section 21 is in a flat plate shape and extends into the groove portion to contact the groove portion. The condensation section 22 is located outside the capacitor core 1. The groove portion can be set at any position on the capacitor core 1, and there is no specific limitation. Exemplarily, the capacitor core 1 is columnar, and the groove portion is provided through the capacitor core 1 along the axis direction, which is beneficial to taking away the heat generated inside the capacitor core 1. The evaporation section 21 and the groove portion can be connected by snap connection or adhesive bonding. The evaporation section 21 and the condensation section 22 are arranged at an angle, which is beneficial to space layout and saves occupied space. In one example, the evaporation section 21 and the condensation section 22 are arranged at a 90-degree angle to adapt to the space limitation of the new energy vehicle inverter and is easy to connect with the cooling component. In addition, by directly connecting the heat pipe with the capacitor core, the thermal resistance on the heat conduction path can be reduced, the temperature gradient can be lowered, thereby improving the stability and reliability of the system. Installing the heat pipe inside the capacitor core can save the space inside the new energy vehicle inverter, especially in applications with limited space. This helps to achieve better thermal management in a compact design and improve the performance density of the overall system.
[0039] In some embodiments, in combination with Figure 4 、 Figure 5 As shown, the evaporation section 21 is tubular, and the evaporation section 21 is sleeved on the capacitor core 1 and contacts the side wall of the capacitor core 1. The size of the evaporation section 21 is adapted to the size of the capacitor core 1. The condensation section 22 is connected to the bottom end of the side wall of the evaporation section 21. This layout can more flexibly adapt to capacitors of different sizes and shapes.
[0040] In some embodiments, in combination with Figure 6 、 Figure 7 As shown, multiple capacitor cores 1 are arranged side by side, and the heat pipe 2 is in an overall flat plate shape and contacts the same side of each capacitor core 1. The heat pipe 2 is used as a temperature equalizing plate. Arranging the heat pipe as a temperature equalizing plate on the capacitor core, the principle is to utilize the excellent heat conduction performance of the heat pipe to equalize the temperature of different parts in the system, thereby improving the stability and performance of the entire system.
[0041] An embodiment of the present invention also provides a new energy vehicle inverter, including the capacitor of the above embodiment and an inverter housing, and the capacitor is located inside the inverter housing. The new energy vehicle inverter of this embodiment can reduce energy consumption and improve reliability.
[0042] An embodiment of the present invention also provides a new energy vehicle, including the new energy vehicle inverter of the above embodiment. The new energy vehicle of this embodiment can reduce energy consumption and improve reliability.
[0043] The following gives five specific embodiments to further illustrate the above embodiments:
[0044] Embodiment 1
[0045] Combined with Figures 1 to 3 As shown, the end face of the capacitor core 1 is provided with a through groove portion. The heat pipe 2 has a right-angle bend and is in an L shape. The evaporation section 21 of the heat pipe 2 extends into the groove portion, and the condensation section 22 is connected to the groove portion by a heat-conducting adhesive. The condensation section 22 is located outside the groove portion. The condensation section 22 is in a flat plate shape, and the bottom is used to contact the cooling component to achieve heat conduction.
[0046] In this embodiment, placing the heat pipe inside the capacitor core can achieve closer thermal contact, thereby improving the heat conduction efficiency. This helps to quickly transfer the heat generated by the capacitor core into the heat pipe, prevent overheating, and improve the heat dissipation efficiency. Installing the heat pipe inside the capacitor core can save space inside the device, especially in applications with limited space. This helps to achieve better thermal management in a compact device design and improve the performance density of the overall system. Additionally, by directly connecting the heat pipe to the capacitor core, the thermal resistance on the heat conduction path can be reduced, the temperature gradient can be lowered, thereby improving the stability and reliability of the system. This helps to extend the service life of the capacitor and reduce the performance fluctuations caused by temperature changes.
[0047] Embodiment Two
[0048] Combined with Figure 4 、 Figure 5 As shown, the evaporation section 21 is tubular, the evaporation section 21 is sleeved on the capacitor core 1, and is in contact with the side wall of the capacitor core 1. The condensation section 22 is connected to the bottom end of the side wall of the evaporation section 21.
[0049] In this embodiment, placing the heat pipe outside the capacitor core does not require modification of the internal structure of the capacitor. This layout can more flexibly adapt to capacitors of different sizes and shapes. Installing the manufactured heat pipe on the capacitor surface can be done by clamping, welding, bonding, or mechanical fixing, etc., to ensure good contact between the heat pipe and the capacitor core and effectively transfer heat to maximize heat conduction and dissipation. Thereby ensuring that the capacitor maintains an appropriate temperature and stability during operation.
[0050] Embodiment Three
[0051] Combined with Figure 6 、 Figure 7 As shown, three capacitor cores 1 are arranged side by side. The heat pipe 2 is in an overall flat plate shape and is in contact with the same side of each capacitor core 1. The heat pipe 2 is used as a temperature equalizing plate to keep the temperature of each capacitor core 1 consistent.
[0052] In this embodiment, the heat pipe is used as a temperature equalizing plate and arranged on the capacitor core. The principle is to utilize the excellent heat conduction performance of the heat pipe to equalize the temperatures of different parts in the system, thereby improving the stability and performance of the entire system. The heat pipe is arranged inside the system, along the key parts where temperature equalization is required in the system, such as the capacitor core. Ensure that the heat pipe can cover the entire system and maintain good thermal contact with each capacitor core. At the same time, the heat pipe is connected to the inverter housing through a thermal pad or thermal adhesive to ensure that heat can be effectively conducted into the heat pipe. This helps to equalize the temperatures of various parts inside the system and reduce the temperature gradient.
[0053] Embodiment 4
[0054] This embodiment provides a new energy vehicle inverter, including any one of the capacitors and the inverter housing in Embodiment 1, Embodiment 2, and Embodiment 3. The capacitor is connected to the inverter housing through a thermal pad or thermal adhesive.
[0055] Embodiment 5
[0056] This embodiment provides a new energy vehicle, including the new energy vehicle inverter in Embodiment 4.
[0057] It should be noted that in the description of the present utility model, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0058] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0059] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.
[0060] In the description of the present utility model, the orientation or positional relationship indicated by terms such as "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0061] Any process or method description shown in a flowchart or described in other ways herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a specific logical function or process. And the scope of the preferred embodiments of the present utility model includes additional implementations, where the functions can be executed in a manner that is not shown or discussed in the order, including in a substantially simultaneous manner or in the reverse order according to the functions involved, which should be understood by those skilled in the technical field to which the embodiments of the present utility model pertain.
[0062] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0063] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation to the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A capacitor, characterized in that, Comprising: At least one capacitor core (1), disposed inside the inverter of a new energy vehicle; A heat pipe (2), at least a part of the heat pipe (2) being in contact with at least a part of at least one capacitor core (1).
2. The capacitor according to claim 1, wherein, The heat pipe (2) includes an integrally formed evaporation section (21) and a condensation section (22), the evaporation section (21) being in contact with the capacitor core (1), and the condensation section (22) being adapted to be in contact with a cooling component.
3. The capacitor according to claim 2, wherein, The capacitor core (1) is provided with a groove portion, the evaporation section (21) is in the shape of a flat plate and extends into the groove portion to be in contact with the groove portion, and the condensation section (22) is located outside the capacitor core (1).
4. The capacitor according to claim 2, wherein The evaporation section (21) is tubular, the evaporation section (21) is sleeved on the capacitor core (1) and is in contact with the side wall of the capacitor core (1).
5. The capacitor according to claim 3, characterized in that, The evaporation section (21) and the condensation section (22) are arranged at an angle.
6. The capacitor according to claim 2, wherein A plurality of the capacitor cores (1) are arranged side by side, and the heat pipe (2) is integrally in the shape of a flat plate and is in contact with the same side of each capacitor core (1).
7. The capacitor according to any one of claims 1 to 6, characterized in that The capacitor core (1) and the heat pipe are connected by means of clamping, welding, bonding or mechanical fixing.
8. An inverter for a new energy vehicle, characterized in that, Comprising the capacitor according to any one of claims 1 to 7 and an inverter housing, the capacitor and the inverter housing being connected by a heat conducting pad or a heat conducting adhesive.
9. A new energy vehicle, characterized in that, Comprising the inverter of a new energy vehicle according to claim 8.