Motor controller and liquid cooling structure thereof
By designing the liquid-cooled structure of the motor controller, the coolant flows through the special liquid-cooled chamber cooling power module and capacitor, the problem of poor heat dissipation effect of the motor controller is solved, and lower working temperature and higher performance are achieved.
Patent Information
- Application Number
- CN202421217105.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing motor controllers have poor heat dissipation effects, resulting in high working temperatures, poor performance, and even pose a threat to vehicle safety.
A liquid-cooled structure of a motor controller is designed, through the communication of the liquid inlet, the first liquid-cooled chamber, the second liquid-cooled chamber and the outlet in the housing, the coolant flows through the first liquid-cooled chamber cooling power module and flows through the second liquid-cooled chamber cooling capacitor to realize heat dissipation of key devices.
It effectively improves the heat dissipation effect of the motor controller, reduces the working temperature, improves performance and work efficiency, and maximizes the heat exchange ability of the coolant, improving the compactness of the structure.
Smart Images
Figure CN222582843U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of motor controllers, and more specifically, to a motor controller and a liquid cooling structure thereof. Background Art
[0002] As part of the vehicle's electronic control system, the motor controller determines the motor's output speed, rotation direction, and energy recovery effect. The working state of the motor controller will directly determine the motor's output performance and further affect the vehicle's power performance.
[0003] The motor controller will generate a lot of heat during operation. If the heat dissipation effect of the motor controller is not good, it will cause the performance indicators such as switching speed, on-state voltage drop, current tail time, turn-off voltage spike and loss to deteriorate, and even pose a serious threat to vehicle safety.
[0004] At present, most motor controllers use liquid convection heat exchange to achieve rapid heat dissipation, but most of them only focus on local heat dissipation. For example, they only design a liquid cooling structure at the power module, which makes the overall heat dissipation effect of the motor controller poor, resulting in a higher operating temperature of the motor controller and poor performance of the motor controller.
[0005] In summary, how to design the heat dissipation of the motor controller to improve the heat dissipation effect of the motor controller, reduce the operating temperature of the motor controller, and improve the performance of the motor controller is a problem that needs to be urgently solved by technical personnel in this field. Utility Model Content
[0006] In view of this, the purpose of the present application is to provide a motor controller and a liquid cooling structure thereof, so as to improve the heat dissipation effect of the motor controller, reduce the operating temperature of the motor controller, and improve the performance of the motor controller.
[0007] In order to achieve the above objectives, this application provides the following technical solutions:
[0008] A liquid cooling structure for a motor controller comprises: a shell, and a power module and a capacitor both arranged in the shell; wherein the shell is provided with a liquid inlet, a first liquid cooling cavity, a second liquid cooling cavity and a liquid outlet which are connected in sequence, the first liquid cooling cavity and the power module are positioned relative to each other so that the cooling liquid flowing through the first liquid cooling cavity cools the power module, and the second liquid cooling cavity and the capacitor are positioned relative to each other so that the cooling liquid flowing through the second liquid cooling cavity cools the capacitor.
[0009] Optionally, the power module is located in the first liquid cooling cavity, the power module is in direct contact with the coolant, and the power module is sealed and connected to the housing to seal the coolant in the first liquid cooling cavity;
[0010] And / or, the capacitor is located outside the second liquid-cooling cavity, and the second liquid-cooling cavity is located at the bottom of the capacitor.
[0011] Optionally, the housing includes a housing body and a cover plate;
[0012] Wherein, the liquid inlet and the first liquid cooling cavity are both integrated into the shell body;
[0013] The outer wall of the shell body is provided with a second liquid cooling cavity upper part and a liquid outlet upper part, the cover plate is provided with a second liquid cooling cavity lower part and a liquid outlet lower part, and the cover plate and the shell body are sealed and connected so that the second liquid cooling cavity upper part and the second liquid cooling cavity lower part form the second liquid cooling cavity, and the liquid outlet upper part and the liquid outlet lower part form the liquid outlet.
[0014] Optionally, the upper portion of the liquid outlet and the lower portion of the liquid outlet are both one half of the liquid outlet, and the upper portion of the second liquid cooling chamber and the lower portion of the second liquid cooling chamber are both one half of the second liquid cooling chamber.
[0015] Optionally, the liquid inlet, the first liquid cooling chamber, the upper portion of the second liquid cooling chamber, the upper portion of the liquid outlet and the shell body are integrally cast, and the lower portion of the second liquid cooling chamber, the lower portion of the liquid outlet and the cover plate are integrally cast.
[0016] Optionally, the first liquid cooling chamber is provided with a communication port, and the first liquid cooling chamber and the second liquid cooling chamber are communicated with each other through the communication port;
[0017] Among them, in the depth direction of the first liquid-cooling cavity, the second liquid-cooling cavity is farther away from the power module than the first liquid-cooling cavity, and the axial direction of the connecting port is the depth direction of the first liquid-cooling cavity; and / or, the bottom wall and side walls of the first liquid-cooling cavity are both smooth walls; and / or, the cross-section of the second liquid-cooling cavity is circular, and the cross-section is perpendicular to the flow direction of the coolant in the second liquid-cooling cavity.
[0018] Optionally, in the depth direction of the first liquid cooling cavity, the liquid inlet is farther away from the power module than the first liquid cooling cavity, and the liquid inlet is connected to the first liquid cooling cavity through a guide channel;
[0019] Wherein, the guide channel is a straight channel, and the guide channel is inclined relative to the depth direction of the first liquid cooling cavity; and / or, at the connection point between the guide channel and the first liquid cooling cavity, the width of the guide channel is the same as the width of the first liquid cooling cavity.
[0020] Optionally, the guide channel is a channel of equal width.
[0021] Optionally, the liquid outlet and the liquid inlet are located on the same side of the shell.
[0022] Based on the liquid cooling structure of the motor controller provided above, the present application also provides a motor controller, which includes the liquid cooling structure of the motor controller described in any one of the above items.
[0023] In the liquid cooling structure of the motor controller provided by the present application, the coolant enters the shell through the liquid inlet, then flows through the liquid inlet, the first liquid cooling chamber, the second liquid cooling chamber and the liquid outlet in sequence, and flows out of the shell through the liquid outlet. Since the first liquid cooling chamber and the power module are in relative positions, the coolant flowing through the first liquid cooling chamber will absorb the heat generated by the power module, thereby cooling the power module; since the second liquid cooling chamber and the capacitor are in relative positions, the coolant flowing through the second liquid cooling chamber will absorb the heat generated by the capacitor, thereby cooling the capacitor. In this way, the liquid cooling structure of the motor controller achieves heat dissipation for the power module and the capacitor. Compared with the prior art that only dissipates heat for the power module, it effectively improves the heat dissipation effect of the motor controller, reduces the operating temperature of the motor controller, improves the performance of the motor controller, and especially improves the working efficiency of the motor controller.
[0024] At the same time, in the liquid cooling structure of the motor controller provided by the present application, the liquid inlet, the first liquid cooling chamber, the second liquid cooling chamber and the liquid outlet are connected in sequence, so that the coolant after cooling the power module cools the capacitor, maximizes the use of the heat exchange capacity of the coolant, and improves the utilization rate of the coolant; moreover, the liquid inlet, the first liquid cooling chamber, the second liquid cooling chamber and the liquid outlet are all arranged on the shell, which improves the integration of the coolant flow channel and the shell, and improves the compactness of the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0026] Figure 1 A schematic diagram of the internal structure of a motor controller provided in an embodiment of the present application;
[0027] Figure 2 A schematic diagram of the structure of a housing in a motor controller provided in an embodiment of the present application;
[0028] Figure 3 A cross-sectional view of a housing in a motor controller provided in an embodiment of the present application;
[0029] Figure 4 A schematic diagram of the structure of the housing in another direction of the motor controller provided in an embodiment of the present application;
[0030] Figure 5 A schematic diagram of an exploded view of a housing in a motor controller provided in an embodiment of the present application.
[0031] Description of reference numerals:
[0032] 1 is the housing, 2 is the power module, and 3 is the capacitor;
[0033] 11 is a housing body, 12 is a cover plate;
[0034] 101 is a liquid inlet, 102 is a connecting port, 103 is a liquid outlet, 104 is a first liquid cooling chamber, 105 is a second liquid cooling chamber, 1051 is an upper portion of the second liquid cooling chamber, 1052 is a lower portion of the second liquid cooling chamber, and 106 is a flow guide channel. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more; "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.
[0037] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0038] The multiple involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.
[0039] The motor controller includes a housing and components disposed in the housing. Among them, the main heat-generating components in the housing include power modules and capacitors. The power module generates a large amount of heat. Currently, only a liquid cooling structure is designed at the power module, and the capacitor is not cooled, resulting in poor overall heat dissipation of the motor controller, high operating temperature of the motor controller, and poor performance of the motor controller.
[0040] In order to solve the above problems, an embodiment of the present application provides a motor controller and a liquid cooling structure thereof, which improves the heat dissipation effect of the motor controller, reduces the operating temperature of the motor controller, and improves the performance of the motor controller by dissipating the heat of the power module and capacitor of the motor controller.
[0041] like Figure 1 As shown, the liquid cooling structure of the motor controller provided in the embodiment of the present application includes: a housing 1, a power module 2 and a capacitor 3, wherein the power module 2 and the capacitor 3 are both arranged in the housing 1.
[0042] Combination Figure 1-5 As shown, the housing 1 is provided with a liquid inlet 101 , a flow guide channel 106 , a first liquid cooling chamber 104 , a communication port 102 , a second liquid cooling chamber 105 and a liquid outlet 103 .
[0043] The liquid inlet 101, the flow guide channel 106, the first liquid cooling chamber 104, the connecting port 102, the second liquid cooling chamber 105 and the liquid outlet 103 are connected in sequence, the liquid inlet 101 is used for the cooling liquid to enter the housing 1, and the liquid outlet 103 is used for the cooling liquid to flow out of the housing 1. In this way, the liquid inlet 101, the flow guide channel 106, the first liquid cooling chamber 104, the connecting port 102, the second liquid cooling chamber 105 and the liquid outlet 103 form a flow channel for the cooling liquid.
[0044] The first liquid cooling chamber 104 and the power module 2 are opposite to each other, and the second liquid cooling chamber 105 and the capacitor 5 are opposite to each other. In this way, the coolant enters the first liquid cooling chamber 104 through the liquid inlet 101 and the guide channel 106, the coolant flowing through the first liquid cooling chamber 104 enters the second liquid cooling chamber 105 through the connecting port 102, and the coolant flowing through the second liquid cooling chamber 105 flows out of the housing 1 through the liquid outlet 103. In this way, the coolant flowing through the first liquid cooling chamber 104 can absorb the heat generated by the power module 2, thereby achieving heat dissipation and cooling of the power module 2, and the coolant flowing through the second liquid cooling chamber 105 can absorb the heat generated by the capacitor 3, thereby achieving heat dissipation and cooling of the capacitor 3.
[0045] The liquid cooling structure of the motor controller provided in the above embodiment realizes the heat dissipation of the power module 2 and the capacitor 3. Compared with the prior art that only dissipates the heat of the power module 2, it effectively improves the heat dissipation effect of the motor controller, reduces the operating temperature of the motor controller, improves the performance of the motor controller, and especially improves the working efficiency of the motor controller. At the same time, the coolant flowing through the first liquid cooling chamber 104 enters the second liquid cooling chamber 105, so that the coolant after cooling the power module 2 cools the capacitor 3, maximizes the heat exchange capacity of the coolant, and improves the utilization rate of the coolant; moreover, the liquid inlet 101, the guide channel 106, the first liquid cooling chamber 104, the connecting port 102, the second liquid cooling chamber 105 and the liquid outlet 103 are all arranged on the housing 1, which improves the flow channel of the coolant and the integration of the housing 1, and improves the compactness of the structure.
[0046] It should be noted that the temperature of the coolant entering the second liquid cooling chamber 105 is lower than the temperature of the capacitor 3. Exemplarily, the temperature of the coolant in the first liquid cooling chamber 104 is 80°C, that is, the temperature of the coolant entering the second liquid cooling chamber 105 is 80°C, and the temperature of the capacitor 3 is 100°C.
[0047] The coolant enters the housing 1 after being cooled by the radiator, so as to ensure that the temperature of the coolant entering the housing 1 is between 60°C and 65°C, so as to ensure that the coolant cools the power module 2 and the capacitor 3. In order to improve the heat dissipation effect, the coolant continuously enters the housing 1, that is, during the operation of the motor controller, the coolant always enters the housing 1 from the liquid inlet 101, and always flows out of the housing 1 from the liquid outlet 103.
[0048] In actual situations, the temperature of the coolant entering the housing 1 may also be selected to be other values, which is not limited in this embodiment.
[0049] In the liquid cooling structure of the motor controller, the power module 2 and the coolant may be in direct contact or indirect contact. In order to improve the heat dissipation effect of the power module 2, the power module 2 may be located in the first liquid cooling cavity 104, the power module 2 and the coolant may be in direct contact, and the power module 2 and the housing 1 may be sealed to seal the coolant in the first liquid cooling cavity 104.
[0050] At least part of the power module 2 is located in the first liquid cooling chamber 104. Exemplarily, part of the power module 2 is immersed in the coolant, so that the coolant directly flows over the lower surface of the power module 2. The depth of the coolant in the first liquid cooling chamber 104 is selected according to actual conditions, and this embodiment does not limit this.
[0051] In order to accelerate the heat dissipation of the power module 2, a heat dissipation fin can be provided on the surface of the power module 2, and the heat dissipation fin is used to directly contact the coolant. The flatness of the surface where the power module 2 and the housing 1 are attached is relatively high, and the power module 2 can be directly attached to the housing 1 through a sealing ring to ensure sealing.
[0052] Based on the structure of the capacitor 3 itself, the capacitor 3 can be selected to be in indirect contact with the coolant. Specifically, the capacitor 3 is located outside the second liquid cooling chamber 105. In this way, the capacitor 3 and the coolant are separated by the shell plate of the shell 1. In order to facilitate the setting of the second liquid cooling chamber 105, the second liquid cooling chamber 105 can be selected to be located at the bottom of the capacitor 3, for example, the second liquid cooling chamber 105 is located directly below or below the side of the capacitor 3. Of course, the second liquid cooling chamber 105 can also be selected to be located at other positions of the capacitor 3, such as the circumferential outer side of the capacitor 3, which is not limited in this embodiment.
[0053] In some embodiments, Figure 3-Figure 5 As shown, the housing 1 comprises a housing body 11 and a cover plate 12; wherein the liquid inlet 101 and the first liquid cooling chamber 104 are integrated in the housing body 11; the outer wall of the housing body 11 is provided with a second liquid cooling chamber upper portion 1051 and a liquid outlet upper portion, the cover plate 12 is provided with a second liquid cooling chamber lower portion 1052 and a liquid outlet lower portion, and the cover plate 12 and the housing body 11 are sealed and connected so that the second liquid cooling chamber upper portion 1051 and the second liquid cooling chamber lower portion 1052 form a second liquid cooling chamber, and the liquid outlet upper portion and the liquid outlet lower portion form a liquid outlet 103. It should be noted that the cover plate 12 is located at the bottom of the housing body 11.
[0054] It should be noted that the second liquid cooling chamber lower part 1052 and the second liquid cooling chamber upper part 1051 can be selected to be half of the second liquid cooling chamber 105, that is, the second liquid cooling chamber lower part 1052 and the second liquid cooling chamber upper part 1051 are equal in size; the liquid outlet upper part and the liquid outlet lower part are both half of the liquid outlet 103, that is, the liquid outlet upper part and the liquid outlet lower part are equal in size. Of course, the second liquid cooling chamber lower part 1052 and the second liquid cooling chamber upper part 1051 can also be selected to be unequal in size, and the liquid outlet upper part and the liquid outlet lower part can be selected to be unequal in size.
[0055] In the above embodiment, the second liquid cooling chamber 105 is designed outside the shell body 11, which saves the internal space of the shell body 11, reserves more space for the arrangement of internal components of the motor controller, and improves the internal space utilization of the motor controller.
[0056] In order to ensure the stability of the shell 1, the cover plate 12 and the shell body 11 can be selected to be sealed and fixedly connected. In order to simplify the structure of the shell 1, the cover plate 12 and the shell body 11 can be selected to be sealed and fixedly connected by welding. In this way, the second liquid cooling chamber 105 and the liquid outlet 103 are welded by the shell body 11 and the cover plate 12, which greatly reduces the risk of leakage and improves reliability.
[0057] In order to simplify the process and improve the feasibility of the process, the cover plate 12 and the shell body 11 can be sealed and fixedly connected by laser welding or friction stir welding.
[0058] In actual situations, the cover plate 12 and the housing body 11 may be sealed and fixedly connected in other ways, for example, the cover plate 12 and the housing body 11 are fixedly connected by fasteners, and the cover plate 12 and the housing body 11 are sealed and connected by a sealing ring. This embodiment does not limit this.
[0059] In order to simplify the manufacture of the housing 1, the liquid inlet 101, the first liquid cooling chamber 104, the second liquid cooling chamber upper part 1051, the liquid outlet upper part and the housing body 11 can be integrally cast, and the second liquid cooling chamber lower part 1052, the liquid outlet lower part and the cover plate 12 can be integrally cast. In this way, after the housing body 11 is cast, the liquid inlet 101, the first liquid cooling chamber 104, the second liquid cooling chamber upper part 1051 and the liquid outlet upper part are also formed; correspondingly, after the cover plate 12 is cast, the second liquid cooling chamber lower part 1052 and the liquid outlet lower part are also formed.
[0060] Of course, the housing 1 may also be produced and manufactured in other ways, not limited to casting.
[0061] In the liquid cooling structure of the motor controller, the communication port 102 can be arranged on the bottom wall or side wall of the first liquid cooling cavity 104, and the first liquid cooling cavity 104 and the second liquid cooling cavity 105 are connected through the communication port 102. In order to facilitate the cooling liquid flowing through the first liquid cooling cavity 104 to enter the second liquid cooling cavity, the communication port 102 can be arranged on the bottom wall of the first liquid cooling cavity 104.
[0062] The relative position relationship between the first liquid cooling chamber 104 and the second liquid cooling chamber 105 is selected according to actual conditions. In order to facilitate the coolant to enter the second liquid cooling chamber 105 from the first liquid cooling chamber 104 and reduce the flow resistance, the second liquid cooling chamber 105 can be selected to be farther away from the power module 2 than the first liquid cooling chamber 104 in the depth direction of the first liquid cooling chamber 104. In this case, in order to facilitate the coolant to flow through the connecting port 102, the axial direction of the connecting port 102 can be selected to be the depth direction of the first liquid cooling chamber 104. In this way, the coolant in the first liquid cooling chamber 104 naturally flows into the connecting port 102 and the second liquid cooling chamber 105 under the action of its own gravity, which effectively reduces the flow resistance and significantly reduces the dead zone, thereby improving the heat dissipation effect.
[0063] It should be noted that, in actual situations, after the liquid cooling structure of the motor controller is normally installed, the depth direction of the first liquid cooling cavity 104 may be a vertical direction.
[0064] In the liquid cooling structure of the motor controller, other methods can also be used to reduce flow resistance and dead zone. On the one hand, the flow resistance in the first liquid cooling chamber 104 is reduced, and the dead zone in the first liquid cooling chamber 104 is reduced. Based on this, the shape design of the first liquid cooling chamber 104 can be selected to have no sudden changes or sharp angles. Specifically, the bottom wall and side walls of the first liquid cooling chamber 104 are both smooth walls. Based on the shape of the power module 2, such as Figure 2 As shown, the first liquid cooling cavity 104 can be selected as a rectangular cavity. Of course, the first liquid cooling cavity 104 can also be selected as other shapes, which is not limited in this embodiment.
[0065] On the other hand, the flow resistance in the second liquid cooling chamber 105 is reduced, and the dead zone in the second liquid cooling chamber 105 is reduced. Based on this, the shape design of the first liquid cooling chamber 104 can be selected to have no sudden changes or sharp angles. Specifically, Figure 3 As shown, the cross section of the second liquid cooling chamber 105 can be selected to be circular, and the cross section is perpendicular to the flow direction of the coolant in the second liquid cooling chamber 105. In this case, the communication port 102 can be selected to be a circular port.
[0066] Of course, the cross-section of the second liquid cooling chamber 105 may also be selected to be other shapes, such as an ellipse, etc., which is not limited in this embodiment.
[0067] In actual situations, the above-mentioned solutions for reducing flow resistance can be combined arbitrarily, and this embodiment does not limit this.
[0068] In the liquid cooling structure of the above-mentioned motor controller, the first liquid cooling chamber 104 and the second liquid cooling chamber 105 can also be connected through a structure other than the connecting port 102, such as a connecting pipe, etc.; or, the first liquid cooling chamber 104 and the second liquid cooling chamber 105 are directly connected, which is not limited in this embodiment.
[0069] In the liquid cooling structure of the motor controller, the liquid inlet 101 is located on the side, bottom or top surface of the housing 1. Figure 1-Figure 5 As shown, the liquid inlet 101 is located on the side of the housing 1. The size and shape of the liquid inlet 101 are selected according to actual conditions.
[0070] In the liquid cooling structure of the motor controller, the liquid inlet 101 and the first liquid cooling chamber 104 are indirectly connected through the guide channel 106. Of course, the liquid inlet 101 and the first liquid cooling chamber 104 can also be directly connected without providing the guide channel 106.
[0071] In some embodiments, Figure 3 As shown, in the depth direction of the first liquid cooling cavity 104 , the liquid inlet 101 is farther away from the power module 2 than the first liquid cooling cavity 104 , and the liquid inlet 101 and the first liquid cooling cavity 104 are indirectly connected through the guide channel 106 .
[0072] In the above embodiment, in order to reduce the flow resistance, the guide channel 106 can be selected as a straight channel, and the guide channel 106 is inclined relative to the depth direction of the first liquid cooling chamber 104. Exemplarily, the inclination angle of the guide channel 106 relative to the depth direction of the first liquid cooling chamber 104 is 45°. Of course, the guide channel 106 can also be selected as an arc channel or other shapes, which is not limited in this embodiment.
[0073] In the above embodiment, Figure 2 As shown, in order to reduce the flow resistance, the width of the guide channel 106 can be the same as the width of the first liquid cooling cavity 104 at the connection point between the guide channel 106 and the first liquid cooling cavity 104. In this way, after the coolant flows in from the liquid inlet 101, it quickly diffuses from the guide channel 106 to the entire width of the first liquid cooling cavity 104, and then moves forward, with basically no heat dissipation dead zone, so that the power module 2 can be evenly cooled, and the heat dissipation effect is improved.
[0074] The above-mentioned guide channel 106 is a channel of equal width or a channel of gradually varying width, which is selected according to actual conditions and is not limited in this embodiment.
[0075] To facilitate the coolant to flow through the entire first liquid cooling chamber 104 , the guide channel 106 and the connecting port 102 are respectively located at two ends of the first liquid cooling chamber 104 . Exemplarily, the guide channel 106 and the connecting port 102 are respectively located at two ends of the length direction of the first liquid cooling chamber 104 .
[0076] In actual situations, the positions of the flow guiding channel 106 and the communication port 102 may also be adjusted appropriately, and are not limited to the above embodiments.
[0077] In the liquid cooling structure of the motor controller, the liquid outlet 103 and the liquid inlet 101 may be located on the same surface of the housing 1 or on different surfaces of the housing 1. In some embodiments, the liquid outlet 103 and the liquid inlet 101 are located on the same side of the housing 1. When the housing 1 includes a housing body 11 and a cover plate 12, the liquid outlet 103 and the liquid inlet 101 are located on the same side of the housing body 11.
[0078] In the above embodiment, the liquid outlet 103 and the liquid inlet 101 are located on the same side of the shell 1. Compared with the lower side entry and exit or the side entry and lower exit, the height of the entire shell 1 is reduced, thereby reducing the space occupied by the entire shell 1 in the height direction, improving the compactness of the overall structure, and being easier to arrange in the whole vehicle environment.
[0079] The coolant mentioned in this article can be a 50% concentration ethylene glycol solution, a 50% concentration propylene glycol solution, or others, which is not limited in this embodiment.
[0080] Based on the liquid cooling structure of the motor controller provided in the above embodiment, this embodiment further provides a motor controller, which includes the liquid cooling structure of the motor controller provided in the above embodiment.
[0081] Since the liquid cooling structure of the motor controller provided in the above embodiment has the above technical effect, and the above motor controller includes the liquid cooling structure of the above motor controller, the above motor controller also has the corresponding technical effect, which will not be repeated here.
[0082] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A liquid cooling structure for a motor controller, characterized in that: The invention comprises: a shell, and a power module and a capacitor both arranged in the shell; wherein the shell is provided with a liquid inlet, a first liquid cooling chamber, a second liquid cooling chamber and a liquid outlet which are connected in sequence, the first liquid cooling chamber and the power module are positioned relative to each other so that the cooling liquid flowing through the first liquid cooling chamber cools the power module, and the second liquid cooling chamber and the capacitor are positioned relative to each other so that the cooling liquid flowing through the second liquid cooling chamber cools the capacitor.
2. The liquid cooling structure of the motor controller according to claim 1, characterized in that: The power module is located in the first liquid cooling cavity, the power module is in direct contact with the coolant, and the power module is sealed and connected to the housing to seal the coolant in the first liquid cooling cavity; And / or, the capacitor is located outside the second liquid-cooling cavity, and the second liquid-cooling cavity is located at the bottom of the capacitor.
3. The liquid cooling structure of the motor controller according to claim 1 or 2, characterized in that: The housing comprises a housing body and a cover plate; Wherein, the liquid inlet and the first liquid cooling cavity are both integrated into the shell body; The outer wall of the shell body is provided with a second liquid cooling cavity upper part and a liquid outlet upper part, the cover plate is provided with a second liquid cooling cavity lower part and a liquid outlet lower part, and the cover plate and the shell body are sealed and connected so that the second liquid cooling cavity upper part and the second liquid cooling cavity lower part form the second liquid cooling cavity, and the liquid outlet upper part and the liquid outlet lower part form the liquid outlet.
4. The liquid cooling structure of the motor controller according to claim 3, characterized in that: The upper portion of the liquid outlet and the lower portion of the liquid outlet are both one half of the liquid outlet, and the upper portion of the second liquid cooling chamber and the lower portion of the second liquid cooling chamber are both one half of the second liquid cooling chamber.
5. The liquid cooling structure of the motor controller according to claim 3, characterized in that: The liquid inlet, the first liquid cooling cavity, the upper portion of the second liquid cooling cavity, the upper portion of the liquid outlet and the shell body are integrally cast, and the lower portion of the second liquid cooling cavity, the lower portion of the liquid outlet and the cover plate are integrally cast.
6. The liquid cooling structure of the motor controller according to claim 1, characterized in that: The first liquid cooling chamber is provided with a communication port, and the first liquid cooling chamber and the second liquid cooling chamber are connected through the communication port; Among them, in the depth direction of the first liquid-cooling cavity, the second liquid-cooling cavity is farther away from the power module than the first liquid-cooling cavity, and the axial direction of the connecting port is the depth direction of the first liquid-cooling cavity; and / or, the bottom wall and side walls of the first liquid-cooling cavity are both smooth walls; and / or, the cross-section of the second liquid-cooling cavity is circular, and the cross-section is perpendicular to the flow direction of the coolant in the second liquid-cooling cavity.
7. The liquid cooling structure of the motor controller according to claim 1, characterized in that: In the depth direction of the first liquid cooling cavity, the liquid inlet is farther away from the power module than the first liquid cooling cavity, and the liquid inlet is connected to the first liquid cooling cavity through a guide channel; Wherein, the guide channel is a straight channel, and the guide channel is inclined relative to the depth direction of the first liquid cooling cavity; and / or, at the connection point between the guide channel and the first liquid cooling cavity, the width of the guide channel is the same as the width of the first liquid cooling cavity.
8. The liquid cooling structure of the motor controller according to claim 7, characterized in that: The flow guiding channel is a channel of equal width.
9. The liquid cooling structure of the motor controller according to claim 1, characterized in that: The liquid outlet and the liquid inlet are located on the same side of the shell.
10. A motor controller, characterized in that: A liquid cooling structure comprising a motor controller as claimed in any one of claims 1 to 9.