Battery pack cover and power battery pack assembly

Abstract

The present invention discloses a battery pack box cover and a power battery pack assembly, wherein the battery pack box cover comprises a box cover shell and an electrical connection component; the box cover shell adopts long glass fiber reinforced thermoplastic plastic, the box cover shell is molded by LFT-D process, the electrical connection component is built into the mold cavity during the box cover shell molding process, the box cover shell and the electrical connection component are integrated into one after molding, and the electrical connection component is partially embedded in the box cover shell; the box cover shell is provided with a main output high-voltage connector mounting hole, a DC charging high-voltage connector mounting hole, and a rear drive motor high-voltage connector mounting hole, and the electrical connection component is partially exposed to the outside of the box cover shell at one end connected to the main output high-voltage connector, the DC charging high-voltage connector, and the rear drive motor high-voltage connector. The present invention can achieve lightweight and simplify the assembly process.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a battery pack cover and a power battery pack assembly. Background Art

[0002] With the rapid development of the automotive industry and the continuous improvement of people's living conditions, cars have become an indispensable means of transportation. Car ownership is increasing year by year, and more and more people own private cars. Currently, with people's growing awareness of environmental protection, new energy vehicles, especially electric vehicles, are experiencing rapid development.

[0003] The battery pack is an important component of electric vehicles, and the battery pack cover is an important component of the battery pack. The lightweighting of the power battery pack plays an important role in reducing the energy consumption of electric vehicles. The existing technology mainly achieves lightweighting of the battery pack cover by making the battery pack cover out of composite materials, but there are the following shortcomings: (1) In order to meet the requirements of strength and modality, the wall of the cover is relatively thick and combined with the reinforcement design, which limits further lightweighting; (2) In order to assemble the high-voltage plug-in on the box body, the height of the cover tray needs to be increased. The tray is generally made of high-density metal materials. Increasing the volume of the tray is not conducive to lightweighting the battery pack; (3) Under the premise of ensuring the lightweight design of the battery tray, the high-voltage connector needs to be fixed to the tray through a bracket. The protruding part of the high-voltage connector will prevent the cover from being placed vertically to the installation position. The opening of the cover needs to be inserted into the protruding part of the high-voltage connector and then rotated a certain angle to the assembly position, which makes the assembly process complicated. Summary of the Invention

[0004] An object of the present invention is to provide a battery pack cover to achieve lightweight and simplify the assembly process.

[0005] A battery pack box cover, comprising a box cover shell and an electrical connection assembly;

[0006] The box cover shell is made of long glass fiber reinforced thermoplastic plastic and is molded by the LFT-D process. The electrical connection component is built into the mold cavity during the molding process of the box cover shell. After molding, the box cover shell and the electrical connection component are combined into one body, and the electrical connection component is partially embedded in the box cover shell.

[0007] The box cover shell is provided with a main output high-voltage connector mounting hole, a DC charging high-voltage connector mounting hole, and a rear drive motor high-voltage connector mounting hole. The main output high-voltage connector mounting hole and the DC charging high-voltage connector mounting hole are located in the front of the box cover shell, and the rear drive motor high-voltage connector mounting hole is located at the rear of the box cover shell;

[0008] The electrical connection assembly is partially exposed outside the box cover shell at one end connected to the main output high-voltage connector, the DC charging high-voltage connector, and the rear drive motor high-voltage connector.

[0009] The battery pack cover proposed in the present invention has the following beneficial effects:

[0010] (1) The box cover shell is made of long glass fiber reinforced thermoplastic and is molded by LFT-D process. Compared with SMC, it has lower density under the premise of comparable strength, thus achieving lightweight. The electrical connection components are built into the mold cavity during the box cover shell molding process. After molding, the box cover shell and the electrical connection components are combined into one body, and the electrical connection components are partially embedded in the box cover shell, which improves the rigidity of the box cover, thereby reducing the local material wall thickness and further achieving lightweight.

[0011] (2) Since the electrical connection components are partially embedded in the box cover shell, the complex fixed connection components can be omitted, thereby simplifying the assembly process of the electrical connection parts and reducing the cost; when the vehicle is equipped with a rear drive motor or a DC charging port in the rear area of ​​the vehicle, one or more high-voltage connectors can be installed behind the box cover shell. The electrical connection components integrated on the box cover significantly reduce the cost compared to the high-voltage wires outside the battery pack, and reducing the distance from the high-voltage connector to the drive motor or DC charging port is conducive to reducing the cost of the vehicle;

[0012] (3) The high-voltage connector can be pre-installed on the box cover shell through the main output high-voltage connector mounting hole, the DC charging high-voltage connector mounting hole, and the rear drive motor high-voltage connector mounting hole, and then electrical conduction is achieved between the electrical connection component and the high-voltage connector. The pre-installed battery pack box cover can be vertically installed on the battery pack from top to bottom, making the assembly process simpler.

[0013] In addition, the battery pack cover provided by the present invention may also have the following additional technical features:

[0014] Furthermore, the electrical connection assembly includes a main output positive copper bar, a main output negative copper bar, a DC charging positive copper bar, a DC charging negative copper bar, a rear drive motor positive copper bar, and a rear drive motor negative copper bar;

[0015] The main output positive copper bar and the main output negative copper bar are installed behind the main output high-voltage connector mounting hole; the DC charging positive copper bar and the DC charging negative copper bar are installed behind the DC charging high-voltage connector mounting hole; the rear drive motor positive copper bar and the rear drive motor negative copper bar are installed in front of the rear drive motor high-voltage connector mounting hole.

[0016] Furthermore, the DC charging positive copper bar and the DC charging negative copper bar pass through the box cover shell from the top of the box cover shell, and the DC charging positive copper bar and the DC charging negative copper bar serve as reinforcement beams of the box cover shell.

[0017] Furthermore, a sealing cover mounting hole is provided on the box cover shell, and the sealing cover is fixed to the box cover shell by fasteners through the sealing cover mounting hole.

[0018] Furthermore, a sealing cover connecting threaded insert is provided on the box cover shell, and the sealing cover connecting threaded insert is connected to the fastener.

[0019] Furthermore, the sealing cover connecting thread insert is formed in the mold by pre-setting the insert in the mold, or is installed by hot pressing embedding or ultrasonic embedding after the box cover shell is formed.

[0020] Furthermore, a thickened portion is provided inside the box cover shell, and the thickened portion is located in the middle of the box cover shell.

[0021] Furthermore, the electrical connection assembly is made of copper alloy or aluminum alloy.

[0022] Furthermore, the main output high-voltage connector is mounted on the main output high-voltage connector mounting hole by bolts, the DC charging high-voltage connector is mounted on the DC charging high-voltage connector mounting hole by bolts, and the rear drive motor high-voltage connector is mounted on the rear drive motor high-voltage connector mounting hole by bolts.

[0023] Another object of the present invention is to provide a power battery pack assembly using the above-mentioned battery pack cover.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0026] Figure 1 This is a schematic structural diagram of a battery pack cover according to a first embodiment of the present invention at a first viewing angle;

[0027] Figure 2 This is a schematic structural diagram of the battery pack cover according to the first embodiment of the present invention at a second viewing angle;

[0028] Figure 3 for Figure 1 Schematic cross-sectional view of the AA plane;

[0029] Figure 4 for Figure 3 Partial magnified image of middle region II;

[0030] Figure 5 for Figure 1 Schematic cross-sectional view of the middle BB surface;

[0031] Figure 6 Schematic diagram of the assembly structure of the battery pack cover, main output high-voltage connector, and DC charging high-voltage connector;

[0032] Figure 7 This is a schematic diagram of the assembly structure of the battery pack cover and the rear drive motor high-voltage connector;

[0033] Figure 8 for Figure 6 Schematic cross-sectional view of the middle CC plane;

[0034] Figure 9 for Figure 6 Schematic cross-sectional view of the middle DD surface;

[0035] Figure 10 A schematic diagram of the assembly structure of the battery pack cover and the battery pack from a first perspective;

[0036] Figure 11 A schematic diagram of the assembly structure of the battery pack cover and the battery pack from a second viewing angle;

[0037] Figure 12 A schematic diagram of the installation structure of the electrical connection component and the high-voltage interface in the battery pack;

[0038] Figure 13 It is a structural schematic diagram of the sealing cover area in the battery pack cover;

[0039] Figure 14 This is a structural diagram of the battery pack cover applied to the entire vehicle. DETAILED DESCRIPTION

[0040] To make the objects, features, and advantages of the present invention more readily apparent, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The accompanying drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered thereon. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions used herein are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0043] See also Figures 1 to 14 The battery pack cover 2 proposed in the first embodiment of the present invention includes a cover shell 21 and an electrical connection assembly 22.

[0044] Among them, the box cover shell 21 is provided with a sealing cover mounting hole 211, a flange surface 212, a main output high-voltage connector mounting hole 213, a DC charging high-voltage connector mounting hole 214, a top fixing hole 215, a flange surface mounting hole 216, a sealing cover connecting threaded insert 217, and a rear drive motor high-voltage connector mounting hole 218.

[0045] In this embodiment, a thickened portion 219 is provided inside the box cover shell 21 , and the thickened portion 219 is located in the middle of the box cover shell 21 .

[0046] In this embodiment, the main output high-voltage connector mounting hole 213 and the DC charging high-voltage connector mounting hole 214 are located in the front of the box cover housing 21, and the rear drive motor high-voltage connector mounting hole 218 is located in the rear of the box cover housing 21. The box cover housing 21 is made of long glass fiber reinforced thermoplastic and is molded using the LFT-D process. The electrical connection assembly 22 is embedded in the mold cavity during the molding process of the box cover housing 21. After molding, the box cover housing 21 and the electrical connection assembly 22 are integrated into one piece. The sealing cover connecting thread insert 217 can be molded in-mold by pre-setting the insert in the mold, or it can be installed after the box cover housing 21 is formed through processes such as hot pressing embedding or ultrasonic embedding. In this embodiment, the sealing cover connecting thread insert 217 is installed on the box cover housing 21 through hot pressing embedding.

[0047] The cover shell 21 has the following typical properties: density of 1.4-1.6g / cm 3 , tensile strength is 90-110 MPa, elastic modulus is 8-10 GPa, bending strength is 130-165 MPa, and thermal deformation temperature is ≥140°C; the electrical connection component 22 is preferably made of copper alloy or aluminum alloy with good conductivity and formability. In this embodiment, the material of the electrical connection component 22 is T2 copper.

[0048] Please refer to Figure 3 and Figure 4 The electrical connection component 22 is partially embedded in the box cover shell 21, and the end of the electrical connection component 22 connected to the high-voltage connector (including the main output high-voltage connector 31, the DC charging high-voltage connector 32, and the rear drive motor high-voltage connector 33) is partially exposed to the outside of the box cover shell 21. Specifically, there is a mounting hole coaxial with the high-voltage connector terminal on the terminal of the electrical connection component 22 behind the high-voltage connector mounting hole (including the main output high-voltage connector mounting hole 213, the DC charging high-voltage connector mounting hole 214, and the rear drive motor high-voltage connector mounting hole 218).

[0049] The electrical connection assembly 22 includes a DC charging positive copper bar 221, a DC charging negative copper bar 222, a main output negative copper bar 223, a main output positive copper bar 224, a rear drive motor positive copper bar 225, and a rear drive motor negative copper bar 226.

[0050] Specifically, the main output positive copper bar 224 and the main output negative copper bar 223 are installed behind the main output high-voltage connector mounting hole 213, and the DC charging positive copper bar 221 and the DC charging negative copper bar 222 are installed behind the DC charging high-voltage connector mounting hole 214; Figure 4It is shown that the DC charging positive copper bar 221 and the DC charging negative copper bar 222 pass through the box cover shell 21 at the top of the battery pack box cover 2, so that the DC charging positive copper bar 221 and the DC charging negative copper bar 222 are fixed in a compact manner by the box cover shell 21. At the same time, the DC charging positive copper bar 221 and the DC charging negative copper bar 222 become reinforcing beams of the box cover shell 21, thereby improving the mode of the box cover shell 21.

[0051] Please refer to Figure 5 The positive copper bar 225 of the rear drive motor and the negative copper bar 226 of the rear drive motor are installed in front of the rear drive motor high-voltage connector mounting hole 218. The positive copper bar 225 of the rear drive motor and the negative copper bar 226 of the rear drive motor are partially embedded in the box cover shell 21, and the positive copper bar 225 of the rear drive motor and the negative copper bar 226 of the rear drive motor are partially exposed to the outside of the box cover shell 21 near the rear drive motor high-voltage connector mounting hole 218.

[0052] Please refer to Figure 6 and Figure 7 The high-voltage connector is pre-installed on the battery pack cover 2. Specifically, the main output high-voltage connector 31 is installed in the main output high-voltage connector mounting hole 213, the DC charging high-voltage connector 32 is installed in the DC charging high-voltage connector mounting hole 214, and the rear drive motor high-voltage connector 33 is installed in the rear drive motor high-voltage connector mounting hole 218. In this embodiment, each high-voltage connector is installed on the battery pack cover 2 by bolts. The battery pack cover 2 has embedded metal nuts at the corresponding bolt mounting positions, and the metal nuts are installed on the cover shell 21 by a hot pressing embedding process.

[0053] Please refer to Figure 8 and Figure 9 The main output positive copper bar 224 and the main output negative copper bar 223 are each installed on the positive and negative terminals of the main output high-voltage connector 31 through bolts 41, the DC charging positive copper bar 221 and the DC charging negative copper bar 222 are each installed on the positive and negative terminals of the DC charging high-voltage connector 32 through bolts 41, and the rear drive motor positive copper bar 225 and the rear drive motor negative copper bar 226 are each installed on the positive and negative terminals of the rear drive motor high-voltage connector 33 through bolts 41; thus, each high-voltage connector is pre-installed on the battery pack cover 2.

[0054] Please refer to Figures 10 to 13 , Figure 13It is shown that the electrical connection component 22 has a section extending out from the box cover shell 21 at the port attachment of the battery distribution unit 55; the battery pack box cover 2 is pre-installed with the main output high-voltage connector 31, the DC charging high-voltage connector 32 and the rear drive motor high-voltage connector 33 and then assembled to the battery pack, and the main output positive copper bar 224, the main output negative copper bar 223, the DC charging positive copper bar 221, the DC charging negative copper bar 222, the rear drive motor positive copper bar 225 and the rear drive motor negative copper bar 226 are respectively installed on the corresponding ports of the battery distribution unit 55 through fasteners 44, and the sealing cover mounting hole 211 provides a feasible operating space for the above assembly steps; at this point, the electrical connection between the internal high-voltage port of the battery pack and the external high-voltage connector is completed; the sealing ring 53 is installed on the sealing cover 5 2, a portion of the sealing ring 53 forms an interference fit with the groove on the lower surface of the sealing cover 52, thereby preventing the sealing ring 53 from falling off. Next, the low-voltage connector 54 is installed on the sealing cover 52. In this embodiment, the low-voltage connector 54 extends from the battery pack and is fixed by fasteners 45. The low-voltage connector 54 is connected to the battery pack controller (not shown) via a flexible cable 541. The flexible cable 541 has a suitable length margin to allow the low-voltage connector 54 to move a suitable distance and be smoothly installed on the sealing cover 52. The sealing cover 52 is fixed to the box cover housing 21 through the sealing cover mounting hole 211 and the fastener 42. Preferably, a metal nut 217 is embedded in the box cover housing 21 to cooperate with the fastener 42 to ensure sufficient connection strength. In addition, the sealing cover connecting thread insert 217 is connected to the fastener 42.

[0055] Please refer to Figure 14 , Figure 14 It is shown that in this embodiment, the main output high-voltage connector 31 arranged on the right side of the front end of the battery pack 61 achieves the shortest distance to the high-voltage box 62 installed in the front compartment, the DC charging high-voltage connector 32 arranged on the left side of the front end of the battery pack 61 achieves the shortest distance to the DC charging interface 63 installed on the left front fender of the vehicle, and the rear drive motor high-voltage connector 33 arranged behind the battery pack 61 achieves the shortest distance to the rear drive motor system 64 installed at the rear of the vehicle, shortening the length of the high-voltage cable 65, the high-voltage cable 66 and the high-voltage cable 67, thereby minimizing the cost of the high-voltage wiring harness of the vehicle.

[0056] According to the above-mentioned battery pack box cover, the box cover shell 21 has holes for installing high-voltage connectors and sealing covers, and the holes for fixing the high-voltage connectors and sealing covers are preferably blind holes. To ensure the connection strength, the mounting holes are preferably built-in metal nuts; the box cover shell 21 has good insulation performance to ensure that the high-voltage connector meets the creepage distance and electrical clearance requirements after installation; the box cover shell 21 has a flange surface, and the flange surface has mounting holes for connecting with the battery tray; the hole for installing the sealing cover is sealed by the sealing cover on the outside of the shell, and the battery pack low-voltage connector can be assembled on the sealing cover; the electrical connection component 22 is partially embedded in the box cover shell 21, and the electrical connection component 22 and the box cover shell 21 are fixed together. The electrical connection component 22 acts as a reinforcing rib inside the box cover shell 21, thereby increasing the rigidity of the box cover shell 21; the electrical connection component 22 is used to connect the high-voltage port in the battery pack and the battery pack output high-voltage interface. Since the connection component 22 is partially embedded in the box cover shell 21, the complex fixed connection component can be eliminated. The electrical connection component 22 is arranged from the top of the battery pack and fixed in a compact manner, which can reduce the internal space of the battery pack, so that more batteries can be arranged; when the vehicle is equipped with a rear drive motor or a DC charging port in the rear area of ​​the vehicle, one or more high-voltage connectors can be installed behind the box cover shell 21. The electrical connection component integrated on the box cover significantly reduces the cost compared to the high-voltage wires outside the battery pack. Reducing the distance from the high-voltage connector to the drive motor or DC charging interface is conducive to reducing the cost of the entire vehicle; the high-voltage connector is pre-installed on the box cover shell 21, and the connector between the electrical connection component and the high-voltage connector is installed from the inside of the box cover shell 21 to achieve electrical conductivity between the electrical connection component and the high-voltage connector. The pre-installed battery pack box cover can be vertically installed on the battery pack from top to bottom, realizing a good assembly process.

[0057] In summary, compared with the existing technology, the battery pack cover has the following advantages:

[0058] (1) Lightweight: The box cover shell is made of long glass fiber reinforced thermoplastic and is molded by LFT-D process. Compared with SMC, it has lower density under the premise of comparable strength, thus achieving lightweight. The electrical connection components are built into the mold cavity during the box cover shell molding process. After molding, the box cover shell and the electrical connection components are combined into one body, and the electrical connection components are partially embedded in the box cover shell, which improves the rigidity of the box cover, thereby reducing the local material wall thickness and further achieving lightweight.

[0059] (2) Reduce costs. Since the electrical connection components are partially embedded in the box cover shell, complex fixed connection components can be omitted, thereby simplifying the assembly process of the electrical connection parts and reducing costs. When the vehicle is equipped with a rear drive motor or a DC charging port in the rear area of ​​the vehicle, one or more high-voltage connectors can be installed behind the box cover shell. The electrical connection components integrated on the box cover significantly reduce the cost compared to the high-voltage wires outside the battery pack. Reducing the distance from the high-voltage connector to the drive motor or DC charging port is conducive to reducing the cost of the vehicle.

[0060] (3) Space optimization: The electrical connection components are arranged from the top of the battery pack and fixed in a compact manner to reduce the space occupied by the battery pack, thereby maximizing the space available for battery arrangement inside the battery pack, which is conducive to achieving the vehicle's range target;

[0061] (4) The assembly process is optimized. The high-voltage connector can be pre-installed on the box cover shell through the main output high-voltage connector mounting hole, the DC charging high-voltage connector mounting hole, and the rear drive motor high-voltage connector mounting hole. Then, electrical conduction is achieved between the electrical connection component and the high-voltage connector. The pre-installed battery pack box cover can be vertically installed on the battery pack from top to bottom, making the assembly process simpler.

[0062] (5) Recyclability: The box cover shell of the present invention is molded using thermoplastic material and has good recyclability.

[0063] A second embodiment of the present invention provides a power battery pack assembly, which includes at least the battery pack cover of the first embodiment.

[0064] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A battery pack cover, characterized in that: It includes a box cover shell and an electrical connection assembly; The box cover shell is made of long glass fiber reinforced thermoplastic plastic, and the box cover shell is molded by LFT-D process. The electrical connection component is built into the mold cavity during the molding process of the box cover shell. After molding, the box cover shell and the electrical connection component are combined into one body, and the electrical connection component is partially embedded in the box cover shell; The box cover shell is provided with a main output high-voltage connector mounting hole, a DC charging high-voltage connector mounting hole, and a rear drive motor high-voltage connector mounting hole. The main output high-voltage connector mounting hole and the DC charging high-voltage connector mounting hole are located in front of the box cover shell, and the rear drive motor high-voltage connector mounting hole is located at the rear of the box cover shell; One end of the electrical connection assembly connected to the main output high-voltage connector, the DC charging high-voltage connector, and the rear drive motor high-voltage connector is partially exposed outside the box cover shell; The box cover shell is also provided with a sealing cover mounting hole, and the sealing cover is fixed to the box cover shell through the sealing cover mounting hole and the fastener; The electrical connection assembly is made of copper alloy or aluminum alloy.

2. The battery pack cover according to claim 1, characterized in that: The electrical connection assembly includes a main output positive copper bar, a main output negative copper bar, a DC charging positive copper bar, a DC charging negative copper bar, a rear drive motor positive copper bar, and a rear drive motor negative copper bar; The main output positive copper bar and the main output negative copper bar are installed behind the main output high-voltage connector mounting hole; the DC charging positive copper bar and the DC charging negative copper bar are installed behind the DC charging high-voltage connector mounting hole; the rear drive motor positive copper bar and the rear drive motor negative copper bar are installed in front of the rear drive motor high-voltage connector mounting hole.

3. The battery pack cover according to claim 2, characterized in that: The DC charging positive copper bar and the DC charging negative copper bar pass through the box cover shell from the top of the box cover shell, and the DC charging positive copper bar and the DC charging negative copper bar serve as reinforcing beams of the box cover shell.

4. The battery pack cover according to claim 1, characterized in that: The box cover shell is also provided with a sealing cover connecting threaded insert, and the sealing cover connecting threaded insert is connected to the fastener.

5. The battery pack cover according to claim 4, characterized in that: The sealing cover connecting thread insert is formed in the mold by presetting the insert in the mold, or is installed by hot pressing embedding or ultrasonic embedding after the box cover shell is formed.

6. The battery pack cover according to claim 1, characterized in that: A thickened portion is provided inside the box cover shell, and the thickened portion is located in the middle of the box cover shell.

7. The battery pack cover according to claim 1, characterized in that: The main output high-voltage connector is installed on the main output high-voltage connector mounting hole by bolts, the DC charging high-voltage connector is installed on the DC charging high-voltage connector mounting hole by bolts, and the rear drive motor high-voltage connector is installed on the rear drive motor high-voltage connector mounting hole by bolts.

8. A power battery pack assembly, characterized in that: A battery pack cover comprising the battery pack cover as claimed in any one of claims 1 to 7.

Images