WO2023173877A1 - 一种电容器的壳体组件和电驱动总成 - Google Patents

一种电容器的壳体组件和电驱动总成 Download PDF

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Publication number
WO2023173877A1
WO2023173877A1 PCT/CN2022/141503 CN2022141503W WO2023173877A1 WO 2023173877 A1 WO2023173877 A1 WO 2023173877A1 CN 2022141503 W CN2022141503 W CN 2022141503W WO 2023173877 A1 WO2023173877 A1 WO 2023173877A1
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WIPO (PCT)
Prior art keywords
cooling channel
cooling
housing
channel
cover plate
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PCT/CN2022/141503
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English (en)
French (fr)
Inventor
田晓凯
加列戈斯·洛佩兹加布里埃尔
张�浩
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精进电动科技股份有限公司
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Publication of WO2023173877A1 publication Critical patent/WO2023173877A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20936—Liquid coolant with phase change
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention belongs to the technical field of motor controllers, and in particular relates to a capacitor housing assembly and an electric drive assembly.
  • a cooling water channel structure is usually set up around the power module to cool the power module, which can provide a better working environment for the power module.
  • water channeling easily occurs between the cooling water channels, resulting in unstable pressure loss of the coolant in the cooling water channels, seriously affecting the heat dissipation effect of the power module.
  • the present invention discloses a capacitor housing assembly and an electric drive assembly to overcome the above problems or at least partially solve the above problems.
  • the present invention provides a capacitor housing assembly.
  • the housing assembly includes an upper cover, a middle housing and a lower cover; the middle housing is provided with an accommodation cavity for accommodating the capacitor, and the The outer side of the upper cover and the outer side of the lower cover are used to set power devices;
  • the upper cover and/or the lower cover are provided with a first liquid inlet and a first liquid outlet, and the upper cover and the lower cover are respectively connected with the upper side and the middle shell.
  • a first cooling channel is formed between the lower sides, and a second cooling channel is formed between the outer side of the upper cover plate, the outer side of the lower cover plate and the power device;
  • the first cooling channel includes a separation protrusion and a separation groove provided in the first cooling channel and extending in the length direction of the intermediate housing, and the separation protrusion extends into the separation groove, And the first cooling channel is divided into a first liquid inlet cooling channel and a first liquid outlet cooling channel.
  • the separation groove is located on the upper side and the lower side of the middle housing, and the separation protrusion is located on the inner side of the upper cover and the inner side of the lower cover;
  • the separation protrusion is located on the upper side and the lower side of the middle housing, and the separation groove is located on the inner side of the upper cover plate and the inner side of the lower cover plate.
  • the inner width of the separation groove is consistent with the width of the separation protrusion.
  • a sealing strip is provided in the dividing groove.
  • the separation protrusion is provided with a guide portion for guiding when the separation protrusion is inserted into the separation groove.
  • the middle housing is provided with a connecting inlet channel and a connecting outlet channel that penetrates the middle housing longitudinally, and the connecting inlet channel is used to connect the third hole on the upper side and the lower side of the middle housing.
  • An inlet liquid cooling channel, the connecting outlet channel is used to communicate with the first liquid outlet cooling channel on the upper side and lower side of the intermediate housing.
  • first liquid inlet and the first liquid outlet respectively correspond to the positions of the communicating inlet channel and the communicating outlet channel.
  • the second cooling channel includes a plurality of cooling liquid grooves arranged on the outer surfaces of the upper cover plate and the lower cover plate and corresponding to the positions of the power devices.
  • the cooling liquid grooves The bottom is provided with a second liquid inlet connected to the first liquid inlet cooling channel and a second liquid outlet connected to the first liquid outlet cooling channel.
  • first liquid inlet and the first liquid outlet are connected through a pressure relief channel.
  • the electric drive assembly includes a motor, a reducer and a motor controller.
  • the motor controller uses any of the above-mentioned housing components to provide capacitors and power devices. .
  • the case assembly of the present invention by providing first cooling channels on both sides of the intermediate case, double-sided cooling of the capacitor is achieved, and the cooling efficiency is higher; and the case assembly is also provided with a third cooling channel for cooling the power device.
  • the second cooling channel can achieve simultaneous cooling of capacitors and power devices, and takes up little space and has a compact structure; in addition, by setting separation protrusions and separation grooves in the first inlet liquid cooling channel and the first liquid outlet cooling channel, it can effectively This prevents water channeling of the coolant in the first inlet cooling channel and the first outlet cooling channel, reduces the pressure loss of the coolant, and thereby makes the flow of the coolant more stable.
  • Figure 1 is a three-dimensional structural view of the housing assembly of the capacitor in one embodiment of the present invention
  • Figure 2 is a bottom view of the housing assembly of the capacitor in one embodiment of the present invention.
  • Figure 3 is a longitudinal anatomical view of the housing assembly of the capacitor in one embodiment of the present invention.
  • Figure 4 is a top view of the intermediate housing in one embodiment of the present invention.
  • the housing assembly includes an upper cover 1, a middle housing 2 and a lower cover 3.
  • the upper cover 1 and The lower cover 3 is fixedly connected to the upper side and the lower side of the middle housing 2 respectively, and the fixed connection can be achieved by friction stir welding;
  • the middle housing 2 is provided with an accommodation cavity for accommodating capacitors, and the upper cover
  • the outer side of the board 1 and the outer side of the lower cover plate 3 are used to set the power devices, and the position setting of the capacitor and the power device can be realized through the housing assembly.
  • the lower cover 3 is provided with a first liquid inlet 4 and a first liquid outlet 5, and a third liquid inlet 4 and a first liquid outlet 5 are formed between the upper cover 1 and the lower cover 3 respectively and the upper side and lower side of the middle housing 2.
  • a cooling channel the first cooling channel is used to cool the capacitor arranged in the middle housing 2, a second cooling channel is formed between the outer side of the upper cover 1, the outer side of the lower cover 3 and the power device, and the second cooling channel is The second cooling channel is used to cool the power devices provided on the upper cover 1 and the lower cover 3; in this way, the cooling liquid enters through the first liquid inlet 4, and then circulates in the first cooling channel and the second cooling channel, and finally It flows out through the first liquid outlet 5 and takes away the heat generated by the capacitor and the power device.
  • the cooling liquid can be water or oil, or other cooling liquids.
  • the design of providing the first liquid inlet 4 and the first liquid outlet 5 on the lower cover 3 facilitates the cooling liquid to flow slowly in the first cooling channel and the second cooling channel, fully carrying out heat exchange, and allowing the cooling liquid to flow slowly. Take away as much heat as possible.
  • the first liquid inlet and the first liquid outlet can be provided separately, for example, the first liquid inlet is provided on the lower cover plate, and the first liquid outlet is provided on the upper cover plate; or, A liquid inlet and a first liquid outlet are both provided on the upper cover; alternatively, both the upper cover and the lower cover are provided with a first liquid inlet and a first liquid outlet; the above arrangements are all in the present invention. within the scope of protection.
  • the length and width of the first cooling channel are close to the length and width of the upper cover 1 and the lower cover 3, so that the cooling liquid in the first cooling channel is in contact with the intermediate housing 2. Large contact area, thereby improving heat dissipation efficiency.
  • the first cooling channel includes a separation protrusion 6 and a separation groove 7 arranged in the middle position of the first cooling channel and along the length direction of the middle housing 2, and the separation protrusion 6 extends into the separation groove 7, and the separation protrusion 6 extends into the separation groove 7.
  • the cooperation between the protrusion 6 and the separation groove 7 separates the first cooling channel into a first liquid inlet cooling channel 8 and a first liquid outlet cooling channel 9.
  • the cooperation between the separation protrusion 6 and the separation groove 7 can effectively prevent the first Water leakage occurs in the cooling liquid in the inlet cooling channel 8 and the first outlet cooling channel 9, which reduces the pressure loss of the coolant, thereby reducing the cooling liquid in the first inlet cooling channel 8 and the first outlet cooling channel 9.
  • the flow is more stable.
  • the first liquid inlet cooling channel 8 and the first liquid outlet cooling channel 9 are connected with the first liquid inlet 4 and the first liquid outlet 5 respectively.
  • the casing assembly in this embodiment adopts a liquid cooling method.
  • first cooling channels on both sides of the capacitor, double-sided cooling of the capacitor is achieved, and the cooling efficiency is higher; and the casing assembly is also provided with a cooling channel for cooling the power.
  • the second cooling channel of the device since each power device is laid flat on both sides of the capacitor, the capacitor and power device can be cooled at the same time, and the space is small and the structure is compact, which indirectly improves the power density of the motor controller.
  • the upper and lower sides of the middle housing 2 are provided with separation grooves 7, and the inner sides of the upper cover 1 and the lower cover 3 are provided with separation grooves 7.
  • the width of the dividing groove 7 is consistent with the width of the dividing protrusion 6, which can effectively prevent the cooling liquid from passing through the gap between the dividing groove 7 and the dividing protrusion 6 from the first liquid inlet cooling channel 8 to the second liquid cooling channel 8.
  • the dividing protrusion 6 is provided with a guide portion for guiding the dividing protrusion 6 when it is inserted into the dividing groove 7 , thereby facilitating the insertion of the dividing protrusion 6 into the dividing groove 7 .
  • the guide portion is an arc-shaped structure or a chamfered structure that separates the top of the protrusion 6 .
  • a sealing strip 10 is also provided in the dividing groove 7.
  • the top of the dividing protrusion 6 squeezes the sealing strip 10, so that the space between the dividing protrusion 6 and the dividing groove 7 is The sealing effect is better, further preventing the occurrence of water channeling.
  • the separation protrusions can also be provided on the upper and lower sides of the middle housing, and the separation grooves can be provided on the inner surfaces of the upper cover and the lower cover.
  • the third aspect can also be achieved. A cooling channel separation effect.
  • the middle housing 2 is provided with a connecting inlet channel 11 and a connecting outlet channel 12 that penetrate longitudinally through the middle housing 2 .
  • the connecting inlet channel 11 is used to connect the upper side of the middle housing 2 and the upper side of the middle housing 2 .
  • the two first liquid inlet cooling channels 8 on the lower side and the connecting outlet channel 12 are used to communicate with the two first liquid outlet cooling channels 9 on the upper and lower sides of the middle housing 2, so that the upper cover 1 and the lower cover
  • the cooling liquid in the first cooling channel between the plate 3 and the intermediate housing 2 uses the same liquid inlet and outlet, making the cooling structure simpler.
  • the communication inlet channel 11 and the communication outlet channel 12 are provided at the end of the middle housing 2, thereby realizing the avoidance of the capacitor.
  • first liquid inlet and the first liquid outlet correspond to the positions of the connecting inlet channel and the connecting outlet channel respectively. This can ensure that after the coolant enters the first liquid inlet, part of it directly enters the lower cover plate and the middle housing. The other part enters the first cooling channel between the upper cover plate and the middle shell through the connecting inlet channel, so that the temperature of the coolant in the first cooling channel on both sides of the middle shell is basically the same. , thereby making the heat dissipation effect of the upper and lower sides of the capacitor and the power devices on the upper and lower sides of the intermediate housing more consistent, ensuring uniform heat dissipation.
  • the second cooling channel includes a plurality of cooling liquid grooves 13 arranged on the outer surfaces of the upper cover plate 1 and the lower cover plate 3 and corresponding to the positions of the power devices.
  • the cooling liquid grooves 13 are formed with the bottom of the power device.
  • the cooling cavity can cool the power devices.
  • the bottom of the cooling liquid tank 13 is provided with a second liquid inlet 14 communicating with the first liquid inlet cooling channel 8 and a second liquid outlet 15 communicating with the first liquid outlet cooling channel 9.
  • the cooling liquid in the first liquid inlet cooling channel 8 can enter the cooling liquid tank 13 through the second liquid inlet 14.
  • the cooling liquid in the cooling liquid tank 13 exchanges heat with the power device and flows through the second liquid outlet. 15 enters the first outlet cooling channel 9.
  • three coolant tanks are respectively provided on the outer surfaces of the upper cover plate and the lower cover plate, and a number of screw holes are provided on the outer periphery of the coolant tank.
  • Each power device is connected to the upper cover plate and the lower cover through screws and screw holes respectively. Fixed connection of the board. Among them, the number and position of the screw holes can be adjusted as needed.
  • a sealing ring is provided between each power device and the coolant tank.
  • the first liquid inlet 4 and the first liquid outlet 5 are connected through a pressure relief channel 16, so that when the cooling liquid enters the first liquid inlet 4, it is partially cooled.
  • the liquid can directly flow to the first liquid outlet 5 through the pressure relief channel 16 . Since the coolant needs to be pressurized to enter the cooling structure on the housing assembly, and the pipelines in the cooling structure are relatively narrow, a high pressure drop will occur during the flow of the coolant in the pipelines, which affects the flow of the coolant in the cooling structure. flow smoothly. Therefore, a pressure relief channel is provided between the first liquid inlet and the first liquid outlet.
  • the pressure drop of the cooling liquid is reduced between the first cooling channel and the second cooling channel, so that the cooling liquid flows smoothly;
  • damage to the cooling results of the housing assembly due to high pressure drop can be prevented, thereby extending the service life of the housing assembly.
  • the coolant enters the first liquid inlet, 80% of the coolant enters the first liquid inlet cooling channel, and 20% of the coolant flows directly to the first liquid outlet through the pressure relief channel and is discharged.
  • the flow path of the coolant in the housing assembly is specifically:
  • the coolant enters through the first liquid inlet and is divided into three channels.
  • the first channel of coolant enters the first liquid inlet cooling channel between the lower cover and the middle shell, and then enters the coolant tank through the second liquid inlet. , then flows into the first liquid cooling channel from the second liquid outlet, and is finally discharged from the first liquid outlet;
  • the second cooling liquid enters the first liquid cooling channel between the upper cover and the middle shell through the connecting inlet channel channel, then enters the coolant tank from the second liquid inlet, then flows into the first liquid outlet cooling channel from the second liquid outlet, and finally flows from the connecting outlet channel to the first liquid outlet for discharge;
  • the third cooling liquid passes through The pressure relief channel flows directly to the first liquid outlet for discharge.
  • Another embodiment of the present invention provides an electric drive assembly, which includes a motor, a reducer and a motor controller, wherein the motor controller uses the housing assembly in any of the above embodiments to provide a capacitor and a motor controller. Power devices, and cooling of capacitors and power devices is achieved, so that the electric drive assembly has the advantages of high power density and good output performance.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

本发明公开了一种电容器的壳体组件和电驱动总成。其中，壳体组件包括上盖板、中间壳体和下盖板；上盖板和/或下盖板上设有第一进液口和第一出液口，上盖板和下盖板分别与中间壳体的上侧面和下侧面之间形成有第一冷却通道，上盖板的外侧面和下盖板的外侧面与功率器件之间均形成有第二冷却通道；第一冷却通道包括设置在第一冷却通道内且在中间壳体长度方向上延伸的分隔凸起和分隔凹槽，分隔凸起伸入分隔凹槽内，并把第一冷却通道分隔成第一进液冷却通道和第一出液冷却通道。该壳体组件可实现电容器和功率器件的同时冷却，并且还可以防止水道间窜水情况的发生，冷却散热效果更好。

Description

一种电容器的壳体组件和电驱动总成
相关申请的交叉引用
本申请要求于2022年03月16日提交中国专利局，申请号为202210260548.4，申请名称为“一种电容器的壳体组件和电驱动总成”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于电机控制器技术领域，特别涉及一种电容器的壳体组件和电驱动总成。
背景技术
在电机控制器功率密度要求逐渐增高的背景下，最大限度的发挥出功率模块的能力将有效的降低模块使用数量，进而减小安装空间，从而提升电机控制器的功率密度。其中，功率模块的散热环境对是否能够最大限度发挥功率模块的能力有着重要影响。
由于冷却水道结构一致性很高，通常在功率模块的周围设置冷却水道结构来实现对功率模块冷却降温，这样可以为功率模块提供更好的工作环境。然而，由于冷却水道结构在加工时存在公差问题，使冷却水道间容易发生窜水的情况，导致冷却水道中冷却液的压力损不稳定，严重影响功率模块的散热效果。
申请内容
针对上述问题，本发明公开了一种电容器的壳体组件和电驱动总成，以克服上述问题或者至少部分地解决上述问题。
为了实现上述目的，本发明采用以下技术方案：
本发明一方面提供一种电容器的壳体组件，所述壳体组件包括上盖板、中间壳体和下盖板；所述中间壳体上设有用于容纳所述电容器的容纳腔，所述上盖板的外侧面和所述下盖板的外侧面用于设置功率器件；
所述上盖板和/或所述下盖板上设有第一进液口和第一出液口，所述上盖板和所述下盖板分别与所述中间壳体的上侧面和下侧面之间形成有第一冷却通道，所述 上盖板的外侧面和所述下盖板的外侧面与所述功率器件之间均形成有第二冷却通道；
所述第一冷却通道包括设置在所述第一冷却通道内且在所述中间壳体长度方向上延伸的分隔凸起和分隔凹槽，所述分隔凸起伸入所述分隔凹槽内，并把所述第一冷却通道分隔成第一进液冷却通道和第一出液冷却通道。
进一步地，所述分隔凹槽位于所述中间壳体的上侧面和下侧面上，所述分隔凸起位于所述上盖板的内侧面和所述下盖板的内侧面上；
或，所述分隔凸起位于所述中间壳体的上侧面和下侧面上，所述分隔凹槽位于所述上盖板的内侧面和所述下盖板的内侧面上。
进一步地，所述分隔凹槽的槽内宽度与所述分隔凸起的宽度大小一致。
进一步地，所述分隔凹槽内设有密封条。
进一步地，所述分隔凸起上设有导向部，用于所述分隔凸起插入所述分隔凹槽时的导向。
进一步地，所述中间壳体上设有纵向贯穿所述中间壳体的连通进通道和连通出通道，所述连通进通道用于连通所述中间壳体上侧面和下侧面上的所述第一进液冷却通道，所述连通出通道用于连通所述中间壳体上侧面和下侧面上的所述第一出液冷却通道。
进一步地，所述第一进液口和所述第一出液口分别与所述连通进通道和所述连通出通道的位置对应。
进一步地，所述第二冷却通道包括若干个设置在所述上盖板的外侧面和所述下盖板的外侧面上且与所述功率器件位置对应的冷却液槽，所述冷却液槽的底部设置有与所述第一进液冷却通道连通的第二进液口和与所述第一出液冷却通道连通的第二出液口。
进一步地，所述第一进液口与所述第一出液口之间通过泄压通道连通。
本发明另一方面提供一种电驱动总成，所述电驱动总成包括电机、减速器和电机控制器，所述电机控制器采用上述任一项所述的壳体组件设置电容器和功率器件。
本发明的优点及有益效果是：
本发明的壳体组件中，通过在中间壳体的两侧设置第一冷却通道，实现对电容器的双面冷却，冷却效率更高；并且该壳体组件中还设有用于冷却功率器件的第二 冷却通道，可以实现电容器和功率器件的同时冷却，且占用空间小，结构紧凑；另外，通过在第一进液冷却通道和第一出液冷却通道设置分隔凸起和分隔凹槽，可以有效防止第一进液冷却通道和第一出液冷却通道中冷却液出现窜水的情况发生，减少冷却液的压力损失，进而使冷却液的流动更为稳定。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本发明的一个实施例中电容器的壳体组件的立体结构图；
图2为本发明的一个实施例中电容器的壳体组件的仰视图；
图3为本发明的一个实施例中电容器的壳体组件的纵向解剖图；
图4为本发明的一个实施例中中间壳体的俯视图。
图中：1、上盖板；2、中间壳体；3、下盖板；4、第一进液口；5、第一出液口；6、分隔凸起；7、分隔凹槽；8、第一进液冷却通道；9、第一出液冷却通道；10、密封条；11、连通进通道；12、连通出通道；13、冷却液槽；14、第二进液口；15、第二出液口；16、泄压通道。
具体实施例
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
以下结合附图，详细说明本发明各实施例提供的技术方案。
本发明的一个实施例中提供一种电容器的壳体组件，如图1～图4所示，该壳体组件包括上盖板1、中间壳体2和下盖板3，上盖板1和下盖板3分别固定连接在中间壳体2的上侧面和下侧面上，具体可通过搅拌摩擦焊接的方式实现固定连接；另外，中间壳体2上设有用于容纳电容器的容纳腔，上盖板1的外侧面和下盖 板3的外侧面用于设置功率器件，通过该壳体组件可实现电容器和功率器件的位置设置。
具体地，下盖板3上设有第一进液口4和第一出液口5，上盖板1和下盖板3分别与中间壳体2的上侧面和下侧面之间形成有第一冷却通道，第一冷却通道用于冷却设置在中间壳体2内的电容器，上盖板1的外侧面和下盖板3的外侧面与功率器件之间均形成有第二冷却通道，第二冷却通道用于冷却设置在上盖板1和下盖板3上的功率器件；这样，冷却液由第一进液口4进入，然后在第一冷却通道和第二冷却通道进行循环，最后通过第一出液口5流出，进而带走电容器和功率器件产生的热量。该冷却液可以是水或油，亦或者是其他冷却液体。
其中，在下盖板3上设置第一进液口4和第一出液口5的设计，便于冷却液能够缓慢在第一冷却通道和第二冷却通道中流动，充分进行热量交换，使冷却液尽可能的带走更多的热量。当然，在其他实施例中，第一进液口和第一出液口可以分开设置，例如第一进液口设置在下盖板上，第一出液口设置在上盖板上；或者，第一进液口和第一出液口均设置在上盖板上；亦或者，上盖板和下盖板上均设有第一进液口和第一出液口；上述设置均在本发明的保护范围之内。
进一步地，如图3和图4所示，第一冷却通道的长度和宽度接近于上盖板1和下盖板3的长宽，使第一冷却通道内的冷却液与中间壳体2有极大的接触面积，进而提高了散热效率。
另外，第一冷却通道包括设置在第一冷却通道中间位置且沿中间壳体2长度方向的分隔凸起6和分隔凹槽7，而分隔凸起6延伸至分隔凹槽7内，通过分隔凸起6与分隔凹槽7的配合，把第一冷却通道分隔成第一进液冷却通道8和第一出液冷却通道9，分隔凸起6和分隔凹槽7配合的设置可有效防止第一进液冷却通道8和第一出液冷却通道9中冷却液出现窜水的情况发生，减少冷却液的压力损失，进而使第一进液冷却通道8和第一出液冷却通道9中冷却液的流动更为稳定。其中，第一进液冷却通道8和第一出液冷却通道9分别与第一进液口4和第一出液口5连通。
本实施例中的壳体组件采用液冷的方式，通过在电容器两侧设置第一冷却通道，实现对电容器的双面冷却，冷却效率更高；并且该壳体组件中还设有用于冷却功率器件的第二冷却通道，由于各功率器件平铺在电容器的两侧，实现电容器和功率器件的同时冷却，且占用空间小，结构紧凑，间接提高了电机控制器的功率密度。
在一个实施例中，如图4所示，中间壳体2的上侧面和下侧面上均设有分隔凹 槽7，上盖板1的内侧面和下盖板3的内侧面上均设有分隔凸起6，在上盖板1和下盖板3装配固定在中间壳体2上时，位于上盖板1和下盖板3的分隔凸起6正好分别插入中间壳体2中上侧面和下侧面的分隔凹槽7，实现对中间壳体2两个侧面的第一冷却通道的分隔。
其中，分隔凹槽7的槽内宽度与分隔凸起6的宽度大小一致，这样可以有效防止冷却液通过分隔凹槽7和分隔凸起6中间的间隙由第一进液冷却通道8窜至第一出液冷却通道9内。并且，分隔凸起6上设有导向部，用于分隔凸起6插入分隔凹槽7时的导向，进而便于分隔凸起6插入到分隔凹槽7内。例如，该导向部为分隔凸起6顶部的弧形结构或者倒角结构。
进一步地，分隔凹槽7内还设有密封条10，在分隔凸起6插入分隔凹槽7时，分隔凸起6的顶部挤压密封条10，使分隔凸起6和分隔凹槽7间的密封效果更好，进一步防止了窜水情况的发生。
当然，在其他实施例中，分隔凸起也可以设置在中间壳体的上侧面和下侧面上，分隔凹槽设置在上盖板的内侧面和下盖板的内侧面上，同样可实现第一冷却通道的分隔效果。
在一个实施例中，如图4所示，中间壳体2上设有纵向贯穿中间壳体2的连通进通道11和连通出通道12，连通进通道11用于连通中间壳体2上侧面和下侧面上的两个第一进液冷却通道8，连通出通道12用于连通中间壳体2上侧面和下侧面上的两个第一出液冷却通道9，使上盖板1和下盖板3与中间壳体2之间的第一冷却通道内的冷却液使用同一个进出液口，使冷却结构更为简单。其中，连通进通道11和连通出通道12设置在中间壳体2的端部，进而实现电容器的避让。
另外，第一进液口和第一出液口分别与连通进通道和连通出通道的位置对应，这样可以保证冷却液进入第一进液口后，一部分直接进入到下盖板与中间壳体之间的第一冷却通道，另一部分通过连通进通道进入到上盖板与中间壳体之间的第一冷却通道，使中间壳体上下两侧的第一冷却通道内冷却液的温度基本相同，进而使电容器上下两侧，以及中间壳体上下两侧功率器件的散热效果更为一致，保证了散热的均匀性。
进一步地，第二冷却通道包括若干个设置在上盖板1的外侧面和下盖板3的外侧面上且与功率器件位置对应的冷却液槽13，冷却液槽13与功率器件的底部形成冷却腔体，可以实现对功率器件的冷却。冷却液槽13的底部设置有与第一进液冷 却通道8连通的第二进液口14和与第一出液冷却通道9连通的第二出液口15。这样，第一进液冷却通道8内的冷却液可以通过第二进液口14进入到冷却液槽13内，冷却液槽13内的冷却液与功率器件进行热交换后由第二出液口15进入第一出液冷却通道9。
优选地，上盖板和下盖板的外侧面上分别设有三个冷却液槽，冷却液槽外周上设有若干螺孔，各功率器件分别通过螺钉和螺孔实现与上盖板和下盖板的固定连接。其中，螺孔的数量和位置可以根据需要进行调整。另外，在冷却液槽的一侧设有定位孔，用于功率器件的定位安装。并且，为了实现功率器件与冷却液槽间的密封，在各功率器件与冷却液槽之间还设有密封圈。
在一个实施例中，如图2所示，第一进液口4与第一出液口5之间通过泄压通道16连通，使冷却液在进入到第一进液口4时，部分冷却液可直接通过泄压通道16流至第一出液口5。由于冷却液需经过加压才能进入壳体组件上的冷却结构中，而冷却结构内的管路相对狭小，冷却液在管路流动过程中会出现很高的压降，影响冷却液在冷却结构中顺利流动。因此，在第一进液口与第一出液口之间设置泄压通道，一方面使冷却液在进入到第一冷却通道和第二冷却通道之间降低压降，使冷却液顺利流动；另一方面，可以防止高压降对壳体组件中冷却结果的损伤，进而延长壳体组件的使用寿命。例如，在冷却液进入到第一进液口时，80％的冷却液进入到第一进液冷却通道中，20％的冷却液通过泄压通道直接流至第一出液口排出。
冷却液在壳体组件中的流经路径具体为：
冷却液由第一进液口进入后分为三路，第一路冷却液进入到下盖板与中间壳体之间的第一进液冷却通道，然后由第二进液口进入冷却液槽，再由第二出液口流入第一出液冷却通道，最后由第一出液口排出；第二路冷却液通过连通进通道进入上盖板与中间壳体之间的第一进液冷却通道，然后由第二进液口进入冷却液槽，再由第二出液口流入第一出液冷却通道，最后由连通出通道流至第一出液口进行排出；第三路冷却液通过泄压通道直接流至第一出液口进行排出。
本发明的另一个实施例中提供一种电驱动总成，该电驱动总成包括电机、减速器和电机控制器，其中，电机控制器采用上述任一实施例中的壳体组件设置电容器和功率器件，并且实现对电容器和功率器件的冷却，使该电驱动总成具有功率密度高，输出性能好的优点。
以上所述，仅为本申请的具体实施方式，在本申请的上述教导下，本领域技术 人员可以在上述实施例的基础上进行其他的改进或变形。本领域技术人员应该明白，上述的具体描述只是更好的解释本申请的目的，本申请的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种电容器的壳体组件，其特征在于，所述壳体组件包括上盖板、中间壳体和下盖板；所述中间壳体上设有用于容纳所述电容器的容纳腔，所述上盖板的外侧面和所述下盖板的外侧面用于设置功率器件；
    所述上盖板和/或所述下盖板上设有第一进液口和第一出液口，所述上盖板和所述下盖板分别与所述中间壳体的上侧面和下侧面之间形成有第一冷却通道，所述上盖板的外侧面和所述下盖板的外侧面与所述功率器件之间均形成有第二冷却通道；
    所述第一冷却通道包括设置在所述第一冷却通道内且在所述中间壳体长度方向上延伸的分隔凸起和分隔凹槽，所述分隔凸起伸入所述分隔凹槽内，并把所述第一冷却通道分隔成第一进液冷却通道和第一出液冷却通道。
  2. 根据权利要求1所述的壳体组件，其特征在于，所述分隔凹槽位于所述中间壳体的上侧面和下侧面上，所述分隔凸起位于所述上盖板的内侧面和所述下盖板的内侧面上；
    或，所述分隔凸起位于所述中间壳体的上侧面和下侧面上，所述分隔凹槽位于所述上盖板的内侧面和所述下盖板的内侧面上。
  3. 根据权利要求2所述的壳体组件，其特征在于，所述分隔凹槽的槽内宽度与所述分隔凸起的宽度大小一致。
  4. 根据权利要求1所述的壳体组件，其特征在于，所述分隔凹槽内设有密封条。
  5. 根据权利要求1所述的壳体组件，其特征在于，所述分隔凸起上设有导向部，用于所述分隔凸起插入所述分隔凹槽时的导向。
  6. 根据权利要求1所述的壳体组件，其特征在于，所述中间壳体上设有纵向贯穿所述中间壳体的连通进通道和连通出通道，所述连通进通道用于连通所述中间壳体上侧面和下侧面上的所述第一进液冷却通道，所述连通出通道用于连通所述中间壳体上侧面和下侧面上的所述第一出液冷却通道。
  7. 根据权利要求6所述的壳体组件，其特征在于，所述第一进液口和所述第一出液口分别与所述连通进通道和所述连通出通道的位置对应。
  8. 根据权利要求1所述的壳体组件，其特征在于，所述第二冷却通道包括若干个设置在所述上盖板的外侧面和所述下盖板的外侧面上且与所述功率器件位置对 应的冷却液槽，所述冷却液槽的底部设置有与所述第一进液冷却通道连通的第二进液口和与所述第一出液冷却通道连通的第二出液口。
  9. 根据权利要求1-8任一项所述的壳体组件，其特征在于，所述第一进液口与所述第一出液口之间通过泄压通道连通。
  10. 一种电驱动总成，其特征在于，所述电驱动总成包括电机、减速器和电机控制器，所述电机控制器采用权利要求1-9任一项所述的壳体组件设置电容器和功率器件。
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