An electric drive assembly compatible with fast charging and non-fast charging

Abstract

The utility model relates to a kind of electric drive assembly compatible with fast charging and non-fast charging, including shell, controller module, drive module and fast charging interface compatible structure are integrated in it;Fast charging interface compatible structure includes: detachable fast charging module, including fast charging positive and negative pole copper bar, the length of fast charging positive and negative pole copper bar is shortened configuration when adapting non-fast charging mode, and fast charging positive and negative pole copper bar surface area increases to reduce resistance;Sealing assembly, encapsulated in the barrel of shell, sealing assembly includes seal line body, seal line body is filled up the gap between sealing contact surface by elastic deformation self-adapting;Modularization adaptation interface, including plug-in connector and buckle fixed assembly, for the installation and electrical connection between detachable fast charging module and shell.The utility model only needs to develop a set of shell mould, realizes function switching by adaptation interface, reduces the number of redundant components;And only need to focus on the sealing performance verification of sealing assembly, greatly shorten verification period.

Description

Technical Field

[0001] This utility model relates to the field of electric drive assembly technology for new energy vehicles, specifically to an electric drive assembly compatible with both fast charging and non-fast charging. Background Technology

[0002] In the field of electric drive systems for new energy vehicles, the compatibility design between systems integrating fast charging (nine-in-one) and those without fast charging (eight-in-one) is a key technical challenge. Currently, achieving compatibility between the two systems typically involves the following methods:

[0003] 1. Repetitive mold design: Two sets of housing molds are developed for the electric drive assembly with integrated fast charging function and the one without fast charging function. This approach results in a long mold development cycle, high cost, and requires multiple experimental verifications, further increasing time and financial investment.

[0004] 2. Increased complexity of the housing structure: Different systems can be adapted by adding cover plates or adjusting the sealing area. However, such solutions impose strict requirements on the wall thickness, flatness, and size of the sealing area of ​​the housing. This not only increases the difficulty of processing but may also lead to a decrease in the strength of the housing and affect the reliability of the whole machine.

[0005] 3. Redundant component dependence: Traditional compatible solutions need to retain the complete structure of the fast charging module (such as fast charging relay, wire harness fixing base, metal shielding ring, etc.), resulting in a large number of components and structural redundancy, which not only occupies space but also increases the complexity of verification.

[0006] It is evident that there is an urgent need to develop an electric drive assembly compatibility technology solution that can simplify mold development, reduce verification costs, and improve compatibility, in order to solve the problems of economy, efficiency, and structural adaptability in existing technologies. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides an electric drive assembly compatible with both fast charging and non-fast charging, comprising a housing that integrates a controller module, a drive module, and a fast charging interface compatible structure; wherein, the fast charging interface compatible structure includes:

[0008] A detachable fast charging module includes fast charging positive and negative copper busbars. The length of the fast charging positive and negative copper busbars is shortened to adapt to non-fast charging mode, and the surface area of ​​the fast charging positive and negative copper busbars is increased to reduce resistance.

[0009] A sealing assembly is encapsulated within the barrel of the housing. The sealing assembly includes a sealing line body that adaptively fills the gap in the sealing contact surface through elastic deformation.

[0010] The modular adapter interface includes a pluggable connector and a snap-fit ​​assembly for installation and electrical connection between the detachable fast charging module and the housing.

[0011] Furthermore, the sealing assembly also includes a metal shielding spring, a gasket, and a tail cover, wherein:

[0012] The metal shielding shrapnel is sleeved on the surface of the barrel of the housing;

[0013] The gasket contacts the metal shielding spring to press and fix the metal shielding spring;

[0014] The tail cover is fitted onto the outermost end of the casing barrel to secure the high-voltage wiring harness.

[0015] Furthermore, the sealing body is made of silicone rubber.

[0016] Furthermore, both the gasket and the tail cover are made of plastic.

[0017] Furthermore, the fast-charging positive and negative copper busbars include a positive copper busbar and a negative copper busbar, wherein:

[0018] The two ends of the positive copper busbar are respectively connected to the relay and the positive terminal of the battery cable fixing base;

[0019] The two ends of the negative copper busbar are respectively connected to the relay and the negative terminal of the battery cable fixing base.

[0020] Furthermore, both the positive electrode copper busbar and the negative electrode copper busbar have a flat structure.

[0021] Furthermore, the detachable fast charging module and the modular adapter interface automatically switch between fast charging and non-fast charging modes via electronic control signals.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention requires only the development of one set of housing molds, and the function switching is achieved through the adapter interface, reducing the number of redundant parts. In addition, the traditional solution requires verification of the sealing performance, EMC and other performance of two sets of molds, while this invention only needs to focus on verifying the sealing performance of the elastic sealing component, which greatly shortens the verification cycle. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the electric drive assembly disclosed in an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the positive and negative copper busbars for the fast charging function disclosed in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the positive and negative copper busbars for the non-fast charging function disclosed in an embodiment of this utility model;

[0027] Figure 4This is a schematic diagram showing the structure of the positive and negative copper busbars for fast charging disclosed in this embodiment of the present invention, which are changed to positive and negative copper busbars for non-fast charging.

[0028] In the picture:

[0029] 100. Housing; 110. Fast charging interface compatible structure; 111. Positive copper busbar; 112. Negative copper busbar; 113. Relay; 114. Fast charging cable fixing base; 115. Metal shielding spring; 116. Gasket; 117. Sealing body; 118. Tail cover. Detailed Implementation

[0030] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0031] like Figure 1 As shown, this utility model aims to provide an electric drive assembly that simplifies mold development and reduces verification costs, compatible with both fast charging and non-fast charging. It mainly includes a housing 100, within which a controller module, a drive module, and reserved installation space for a fast charging interface compatible structure 110 are integrated. The fast charging interface compatible structure 110 includes a detachable fast charging module, a sealing component, and a modular adapter interface. Through the detachable fast charging module, the elastic sealing component, and the modular adapter interface, compatible switching between fast charging and non-fast charging functions is achieved.

[0032] The fast-charging interface compatible structure 110 includes a detachable fast-charging module, a sealing assembly, and a modular adapter interface. The detachable fast-charging module includes positive and negative copper busbars, a connector, and control circuitry, and supports physical disassembly or functional disabling. The sealing assembly is encapsulated within the barrel of the housing 100 and includes a sealing wire 117, which adaptively fills the gaps in the sealing contact surface through elastic deformation. The modular adapter interface includes a pluggable connector and a snap-fit ​​fixing assembly, enabling quick installation and electrical connection between the detachable fast-charging module and the housing 100.

[0033] Please see Figure 2-4The lengths of the fast-charging positive and negative copper busbars are shortened to adapt to non-fast-charging modes, and the surface area of ​​the fast-charging positive and negative copper busbars is increased to reduce resistance. Specifically, the fast-charging positive and negative copper busbars include a positive copper busbar 111 and a negative copper busbar 112. In fast-charging mode, the two ends of the positive copper busbar 111 are connected to the relay 113 and the positive terminal of the battery cable holder, respectively, and the two ends of the negative copper busbar 112 are connected to the relay 113 and the negative terminal of the battery cable holder, respectively. The relay 113 connects to the fast-charging cable holder 114 and the adapter copper busbar. In non-fast-charging mode, the lengths of the positive copper busbar 111 and the negative copper busbar 112 are shortened, and both the positive copper busbar 111 and the negative copper busbar 112 have a flat structure to reduce resistance and improve conductivity.

[0034] In this embodiment, the sealing assembly includes a metal shielding spring 115, a gasket 116, a sealing body 117, and a tail cover 118. The metal shielding spring 115, made of stainless steel, is fitted onto the surface of the barrel of the housing 100 to improve electromagnetic compatibility (EMC). The gasket 116 contacts the metal shielding spring 115 to press and fix it, preventing displacement and ensuring the stability of the seal. The tail cover 118 is fitted onto the outermost end of the housing barrel to secure the high-voltage wiring harness. Preferably, the sealing body 117 is made of silicone rubber. Utilizing the high elastic deformation capacity of silicone rubber, it adaptively fills the gaps in the contact surfaces caused by module disassembly. Furthermore, it reduces dependence on the housing wall thickness and flatness, ensuring the sealing performance is unaffected by processing errors. The gasket 116 and the tail cover 118 are both made of plastic.

[0035] The pluggable connector in the modular adapter interface integrates a self-locking mechanism and an anti-misplugging design to ensure the reliability of the connection after the fast charging module is installed. It also supports CAN bus communication, automatically identifies the module status, and switches the operating mode accordingly. The snap-fit ​​fixing component uses elastic snaps to quickly lock and release the fast charging module, and a waterproof rubber ring is provided at the interface to prevent external environmental intrusion. Because this is a standard design in this field, it is not shown in the figure. The detachable fast charging module and the modular adapter interface automatically switch between fast charging and non-fast charging modes via an electronic control signal.

[0036] The workflow of this utility model is as follows:

[0037] Fast charging mode: The detachable fast charging module is installed on the housing through a modular adapter interface. The main controller detects the presence of the fast charging module through the CAN bus, automatically switches to fast charging mode, and activates the high-voltage circuit. The silicone rubber sealing body is squeezed by the module and undergoes elastic deformation, tightly fitting the inner wall of the barrel to ensure sealing.

[0038] Non-fast charging mode: When the fast charging module is removed, the elastic sealing component automatically fills the gap in the housing 100 barrel caused by the removal of the fast charging module. The main controller detects the absence of the fast charging module and automatically limits the charging current to the upper limit of the non-fast charging mode. The system then switches to normal charging mode.

[0039] This embodiment only requires the development of one set of shell molds, and the function switching is realized through the adapter interface, saving mold opening costs. In addition, the traditional solution requires verification of the sealing performance, EMC and other performance of two sets of molds, while this solution only needs to focus on the sealing performance verification of the elastic sealing component, shortening the verification cycle. Moreover, the sealing component adaptively fills the gap, allowing the shell processing error of ±0.5mm, improving compatibility.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric drive assembly compatible with both fast charging and non-fast charging, characterized in that, Includes a housing (100), which integrates a controller module, a drive module, and a fast-charging interface compatible structure (110); wherein, the fast-charging interface compatible structure (110) includes: A detachable fast charging module includes fast charging positive and negative copper busbars. The length of the fast charging positive and negative copper busbars is shortened to adapt to non-fast charging mode, and the surface area of ​​the fast charging positive and negative copper busbars is increased to reduce resistance. A sealing assembly is encapsulated within the barrel of the housing (100), the sealing assembly including a sealing line body (117) that adaptively fills the gap in the sealing contact surface through elastic deformation; A modular adapter interface, including a pluggable connector and a snap-fit ​​assembly, is provided for installation and electrical connection between the detachable fast charging module and the housing (100).

2. The electric drive assembly compatible with both fast charging and non-fast charging according to claim 1, characterized in that, The sealing assembly further includes a metal shielding spring (115), a gasket (116), and a tail cover (118), wherein: The metal shielding spring (115) is sleeved on the barrel surface of the housing (100); The gasket (116) contacts the metal shielding spring (115) to press and fix the metal shielding spring (115). The tail cover (118) is fitted onto the outermost end of the barrel of the housing (100) to fix the high-voltage wiring harness.

3. The electric drive assembly compatible with both fast charging and non-fast charging according to claim 1, characterized in that, The sealing body (117) is made of silicone rubber.

4. The electric drive assembly compatible with both fast charging and non-fast charging according to claim 2, characterized in that, Both the gasket (116) and the tail cover (118) are made of plastic.

5. The electric drive assembly compatible with both fast charging and non-fast charging according to claim 1, characterized in that, The fast charging positive and negative copper busbars include a positive copper busbar (111) and a negative copper busbar (112), wherein: The two ends of the positive copper busbar (111) are respectively connected to the relay (113) and the positive terminal of the battery cable fixing seat; The two ends of the negative copper busbar (112) are respectively connected to the relay (113) and the negative terminal of the battery cable fixing seat.

6. The electric drive assembly compatible with both fast charging and non-fast charging according to claim 5, characterized in that, Both the positive electrode copper busbar (111) and the negative electrode copper busbar (112) have a flat structure.

7. The electric drive assembly compatible with both fast charging and non-fast charging according to claim 1, characterized in that, The detachable fast charging module and the modular adapter interface automatically switch between fast charging and non-fast charging modes via electronic control signals.

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