Battery pack case and vehicle

Abstract

This application discloses a battery pack housing and a vehicle, belonging to the field of battery technology. The battery pack housing includes an inner shell, a heat-conducting plate, and a cover plate. The inner shell has a first receiving cavity with a first opening. The inner shell has a groove communicating with the first receiving cavity. The heat-conducting plate is disposed in the first receiving cavity, connected to the inner shell, and covers the groove. The cover plate is connected to the inner shell and covers the first opening. The cover plate and the heat-conducting plate are spaced apart. This application forms a flow channel by providing a groove in the inner shell and having the heat-conducting plate cover the groove, enabling the inner shell and the heat-conducting plate to function as a liquid cooling plate. This eliminates the need for a liquid cooling plate, reduces the number of internal components of the battery pack housing, and achieves overall weight reduction while meeting functional requirements.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack housing and a vehicle. Background Technology

[0002] The battery pack housing is the load-bearing and protective structure of the power battery system. It is usually composed of a lower shell and an upper cover. It is used to house the battery cells and electrical components, and provides functions such as sealing, dust and water protection, impact resistance and installation positioning. At the same time, it bears the vibration of the vehicle bottom and the road load, ensuring the reliable operation of the system.

[0003] However, battery pack housings typically require a large number of internal components to achieve functions such as load-bearing, protection, sealing, and thermal management. The increased number of components leads to structural stacking and more connectors, resulting in an increase in overall weight and further raising the vehicle's energy consumption and affecting its range. Summary of the Invention

[0004] Purpose of the invention: This application provides a battery pack housing to solve the technical problem of high overall weight of the battery pack housing; another purpose of this application is to provide a vehicle.

[0005] Technical solution: This application provides a battery pack housing, including: The inner housing has a first receiving cavity, the first receiving cavity forming a first opening in the inner housing, and the inner housing has a groove communicating with the first receiving cavity; A heat-conducting plate is disposed in the first receiving cavity, the heat-conducting plate is connected to the inner shell, and covers the groove; A cover plate is connected to the inner shell and covers the first opening. The cover plate is spaced apart from the heat-conducting plate.

[0006] In some embodiments, the inner shell is an integrally molded part, and the material of the inner shell includes thermoplastic resin and reinforcing fibers; The cover plate is a one-piece molded part, and the material of the cover plate includes thermoplastic resin and reinforcing fibers.

[0007] In some embodiments, the inner housing includes: First bottom wall; A first sidewall, which surrounds the first opening and is connected to the first bottom wall to form the first receiving cavity; the cover plate is connected to the first sidewall. The first bottom wall protrudes in a direction away from the cover plate, forming a groove on the side of the first bottom wall facing the cover plate and a protrusion on the side of the first bottom wall away from the cover plate.

[0008] In some embodiments, the inner housing has a plurality of grooves, a portion of which are a plurality of first grooves and a portion of which are a plurality of second grooves. The first grooves and the second grooves are connected. The first grooves extend along a first direction. The plurality of first grooves are spaced apart along a second direction. The second grooves extend along the second direction. The plurality of second grooves are spaced apart along the first direction. The cover plate is connected to one side of the inner housing along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0009] In some embodiments, the heat-conducting plate has a first through hole and a second through hole that are respectively connected to the groove.

[0010] In some embodiments, the battery pack housing further includes a support member disposed in the first receiving cavity. The two ends of the support member are respectively connected to the inner shell along at least one of a first direction and a second direction. The support member is an integrally molded injection molded part, and the material of the support member includes thermoplastic resin and reinforcing fibers.

[0011] In some embodiments, the support member includes: Multiple crossbeams extend along a first direction, and the two ends of the crossbeams along the first direction are respectively connected to the inner shell. The multiple crossbeams are spaced apart along a second direction. A longitudinal beam extends along the second direction and is disposed between two adjacent crossbeams along the second direction. Each end of the longitudinal beam along the second direction is connected to a crossbeam.

[0012] In some embodiments, the battery pack housing further includes an outer shell, the outer shell comprising: The second bottom wall is disposed on the side of the inner housing opposite to the cover plate; The second sidewall is connected to the side of the second bottom wall near the cover plate and is disposed around the inner housing.

[0013] In some embodiments, the outer shell is an integrally molded injection molded part, and the material of the outer shell includes thermoplastic resin and reinforcing fibers; The second bottom wall is provided with multiple third through holes; The outer casing also includes: The first reinforcing rib is connected to the second sidewall and extends along the circumference of the second sidewall; The second reinforcing rib is connected to the second side wall and extends along the direction from the cover plate to the second bottom wall. The first reinforcing rib and the second reinforcing rib are arranged to cross each other and are connected.

[0014] In some embodiments, the housing further includes a connecting portion connected to the second sidewall, the connecting portion having a through-hole for fixing.

[0015] In some embodiments, the battery pack housing further includes a connector, the inner housing is provided with a flange on its periphery, the cover plate and the second side wall are respectively provided on both sides of the flange, and the connector passes through the flange and connects the cover plate and the second side wall respectively.

[0016] In some embodiments, the battery pack housing further includes a bottom protective plate connected to the side of the second bottom wall opposite to the inner housing.

[0017] In some embodiments, The thermoplastic resin includes one or more of polypropylene, polyamide, polybutylene terephthalate, polyethylene terephthalate, polycarbonate, polystyrene, acrylonitrile-butadiene-styrene copolymer, polyphenylene sulfide, polyetheretherketone, and polyetherimide. The reinforcing fibers include one or more of glass fibers, aramid fibers, carbon fibers, boron fibers, natural fibers, basalt fibers, and ceramic fibers.

[0018] Accordingly, this application also provides a vehicle including a battery pack housing as described in any of the above embodiments.

[0019] Beneficial Effects: Compared with the prior art, the battery pack housing provided in this application includes an inner shell, a heat-conducting plate, and a cover plate. The inner shell has a first receiving cavity with a first opening. The inner shell also has a groove communicating with the first receiving cavity. The heat-conducting plate is disposed in the first receiving cavity, connected to the inner shell, and covers the groove. The cover plate is connected to the inner shell and covers the first opening. The cover plate and the heat-conducting plate are spaced apart. This application forms a flow channel by providing a groove in the inner shell and having the heat-conducting plate cover the groove. This allows the inner shell and the heat-conducting plate to function as a liquid cooling plate, thereby eliminating the need for a liquid cooling plate, reducing the number of internal components of the battery pack housing, and achieving a reduction in overall weight while meeting functional requirements. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 This is a schematic diagram of the battery pack housing after the cover plate has been removed, as provided in an embodiment of this application. Figure 2 This is a cross-sectional schematic diagram of the battery pack housing provided in an embodiment of this application; Figure 3 for Figure 2 Detailed view of section A in the middle frame; Figure 4 An exploded view of the battery pack housing after the cover plate has been removed, as provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of the inner shell in the battery pack housing provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the support frame in the battery pack housing provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the outer shell of the battery pack housing provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures: 100 - Inner shell; 110 - First side wall; 120 - First bottom wall; 130 - First receiving cavity; 140 - First opening; 150 - Groove; 151 - First groove; 152 - Second groove; 160 - Protrusion; 170 - Flanged edge; 200 - Heat-conducting plate; 300 - Cover plate; 400 - Support; 410 - Crossbeam; 420 - Longitudinal beam; 500 - Outer shell; 510 - Second side wall; 520 - Second bottom wall; 521 - Third through hole; 530 - Second receiving cavity; 540 - Second opening; 550 - First reinforcing rib; 560 - Second reinforcing rib; 570 - Connecting part; 571 - Fixing hole; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0026] It should also be noted that in the accompanying drawings of the embodiments of this application, the arrows labeled X, Y, and Z respectively represent the first direction X, the second direction Y, and the third direction Z. The description of this application introduces the first direction X, the second direction Y, and the third direction Z to more clearly express the relative positional relationship involved in this application. The first direction X, the second direction Y, and the third direction Z are three intersecting relative directions, not absolute directions. In practical applications, the first direction X, the second direction Y, and the third direction Z can point to any direction in space, as long as the intersection relationship between them is maintained.

[0027] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0028] The battery pack housing is the load-bearing and protective structure of the power battery system. It is usually composed of a lower shell and an upper cover. It is used to house the battery cells and electrical components, and provides functions such as sealing, dust and water protection, impact resistance and installation positioning. At the same time, it bears the vibration of the vehicle bottom and the road load, ensuring the reliable operation of the system.

[0029] However, battery pack housings typically require a large number of internal components to achieve functions such as load-bearing, protection, sealing, and thermal management. The increased number of components leads to structural stacking and more connectors, resulting in an increase in overall weight and further raising the vehicle's energy consumption and affecting its range.

[0030] To address the aforementioned technical problem of high overall weight of the battery pack housing, the first embodiment of this application provides a battery pack housing. Please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4 The battery pack housing includes an inner shell 100, a heat-conducting plate, and a cover plate 300. The inner shell 100 has a first receiving cavity 130, and the first receiving cavity 130 forms a first opening 140 in the inner shell 100. The inner shell 100 has a groove 150 communicating with the first receiving cavity 130. The heat-conducting plate 200 is disposed in the first receiving cavity 130, connected to the inner shell 100, and covers the groove 150. The cover plate 300 is connected to the inner shell 100 and covers the first opening 140. The cover plate 300 and the heat-conducting plate 200 are spaced apart.

[0031] Specifically, the heat-conducting plate 200 covers the groove 150 to form a flow channel for liquid flow.

[0032] In some embodiments, the first receiving cavity 130 is used to place a single battery cell, which is connected to the heat-conducting plate 200. The liquid in the flow channel can exchange heat with the single battery cell through the heat-conducting plate 200 to achieve the function of heat dissipation or heating of the single battery cell.

[0033] In some embodiments, the heat-conducting plate 200 is an aluminum heat-conducting plate 200. Specifically, in some embodiments, the heat-conducting plate 200 is made of hexadecimal or tri-ary aluminum material to obtain lower thermal resistance.

[0034] In the above embodiment, since the inner shell 100 is provided with a groove 150 communicating with the first receiving cavity 130, the heat-conducting plate 200 is arranged in the first receiving cavity 130 and connected to the inner shell 100, covering the groove 150. The groove 150 and the heat-conducting plate 200 together enclose and form a flow channel, thereby achieving the closed boundary of the flow channel by connecting the interconnected inner shell 100 and the heat-conducting plate 200. Based on this, the independent liquid cooling plate originally provided to form the flow channel is replaceable in terms of structural configuration, thus allowing the battery pack housing in the above embodiment to eliminate the need for the liquid cooling plate and its related accessories, thereby allowing a reduction in the number of battery pack housing components and also allowing the battery pack housing to achieve the purpose of weight reduction.

[0035] In addition, in the battery pack housing in the above embodiments, since the liquid cooling plate can be omitted from the space in the first direction X, the number of components stacked in the battery pack housing in the first direction X can be reduced, and the number of assembly steps, positioning links and fastening points in the battery pack housing in the first direction X can also be reduced, thereby reducing the cumulative tolerance in the first direction X and improving the assembly yield of the battery pack housing.

[0036] In some embodiments, the width of the groove 150 is 5 mm; in some embodiments, the depth of the groove 150 is less than or equal to 5 mm and greater than or equal to 4 mm.

[0037] In some embodiments, the thickness of the heat-conducting plate 200 is less than or equal to 1.5 mm and greater than or equal to 1 mm.

[0038] In some embodiments, the inner housing 100 is an integrally molded part, and the material of the inner housing 100 includes thermoplastic resin and reinforcing fibers; the cover plate 300 is an integrally molded part, and the material of the cover plate 300 includes thermoplastic resin and reinforcing fibers.

[0039] Firstly, in the above embodiments, both the inner shell 100 and the cover plate 300 are integrally molded parts, and the materials include thermoplastic resin and reinforcing fibers. Compared with traditional box-type structural components mainly made of metal materials, the aforementioned materials including thermoplastic resin and reinforcing fibers have a lower density, thereby enabling the inner shell 100 and the cover plate 300 to have a lower mass while meeting structural and functional requirements, resulting in a lower overall mass for the battery pack box.

[0040] Secondly, in the above embodiments, the integral molding process makes the structural continuity between the inner shell 100 and the cover plate 300 stronger, reducing the risk of weak links and local stress concentration caused by splicing multiple parts, and allowing the battery pack box to have good structural stability and load-bearing stiffness under the premise of lightweight.

[0041] Thirdly, in the above embodiments, the inner shell 100 and the cover plate 300 are integrally molded parts, meaning that the inner shell 100 and the cover plate 300 do not need to be spliced ​​into multiple sections to form a complete shape. This reduces the number of splicing seams, connection interfaces, or potential weak areas inside the inner shell 100 and the cover plate 300, enabling the inner shell 100 and the cover plate 300 to achieve better sealing, dustproof, and waterproof performance, thereby improving the reliability of the battery pack housing. Simultaneously, integral molding can achieve multiple structural features in the same molding process, reducing the need for secondary assembly or multi-part fitting, thus simplifying the manufacturing and assembly processes. When assembly steps and connection points are reduced, the tolerance chain is shortened accordingly, potentially reducing the risk of dimensional fluctuations and assembly deviations caused by accumulated tolerances, thereby improving product consistency and yield.

[0042] In some embodiments, please refer to Figure 1 and Figure 5 The inner shell 100 includes a first bottom wall 120 and a first side wall 110; the first side wall 110 is arranged around to form a first opening 140 and is connected to the first bottom wall 120 to form a first receiving cavity 130, and the cover plate 300 is connected to the first side wall 110; wherein, a portion of the first bottom wall 120 protrudes in the direction away from the cover plate 300, a groove 150 is formed on the side of the first bottom wall 120 facing the cover plate 300, and a protrusion 160 is formed on the side of the first bottom wall 120 away from the cover plate 300.

[0043] In the above embodiment, a groove 150 is formed on the inner side of the first bottom wall 120. The groove 150 can cooperate with the heat-conducting plate 200 to form a flow channel for liquid flow. At the same time, a protrusion 160 is formed on the outer side of the first bottom wall 120. The protrusion 160 can locally strengthen the first bottom wall 120, improve the bending resistance of the area and improve the shape retention ability, thereby helping to improve the local stiffness and structural stability of the bottom wall.

[0044] Meanwhile, in the above embodiments, by forming a groove 150 on the inner side of the bottom wall and a protrusion 160 on the outer side in one step, the channel cavity base and structural reinforcement can be reused in the same structure, thereby reducing the possibility of additional parts being stacked, and thus forming a synergistic support for saving parts and reducing weight.

[0045] In some embodiments, please refer to Figure 5 The inner shell 100 has a plurality of grooves 150, a portion of which are a plurality of first grooves 151 and a portion of which are a plurality of second grooves 152. The first grooves 151 and the second grooves 152 are connected. The first grooves 151 extend along a first direction X. The plurality of first grooves 151 are spaced apart along a second direction Y. The second grooves 152 extend along the second direction Y. The plurality of second grooves 152 are spaced apart along the first direction X. The cover plate 300 is connected to one side of the inner shell 100 along a third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0046] In the above embodiments, since multiple first grooves 151 are spaced apart along the second direction Y and multiple second grooves 152 are spaced apart along the first direction X, and the first grooves 151 and second grooves 152 are interconnected, multiple interconnected flow paths can be formed when a closed flow channel is subsequently formed. The fluid can exhibit multiple branching and merging in the network, thereby forming multiple parallel channels under the same overall flow demand. The existence of parallel branches generally helps to reduce the accumulation of flow resistance on a single path and provides a path basis for the redistribution of flow in the plane.

[0047] In addition, in the above embodiments, after the groove 150 is formed on the first bottom wall 120, a protrusion is usually formed on the other side of the bottom wall, and the first groove 151 and the second groove 152 are distributed in an intersecting manner, so that the protrusions formed by the first groove 151 and the second groove 152 can also be distributed in an interlaced manner, thereby enabling the inner shell 100 to obtain higher rigidity in multiple directions.

[0048] In some embodiments, the heat-conducting plate 200 has a first through hole and a second through hole that are respectively connected to the groove 150.

[0049] Understandably, one of the first through hole and the second through hole is used as an inlet hole for the flow channel formed by the groove 150 and the heat-conducting plate 200, and the other is used as an outlet hole for the flow channel, so that the liquid in the flow channel can circulate with the outside.

[0050] In some embodiments, please refer to Figure 1 and Figure 4 The battery pack housing also includes a support member 400, which is disposed in the first receiving cavity 130. The two ends of the support member 400 along at least one of the first direction X and the second direction Y are respectively connected to the inner shell 100. The support member 400 is an integrally molded injection molded part, and the material of the support member 400 includes thermoplastic resin and reinforcing fiber.

[0051] In the first aspect, in the above embodiment, the support member 400 is disposed in the first receiving cavity 130, and its two ends along at least one of the first direction X and the second direction Y are respectively connected to the inner shell 100, thereby enabling the support member 400 to increase the force transmission path and constrain the relative displacement of the inner shell 100 at both ends, thereby improving the overall rigidity of the inner shell 100.

[0052] Secondly, in the above embodiments, the support member 400 is made of a material including thermoplastic resin and reinforcing fiber, which can achieve the weight reduction of the support member 400. By setting the support member 400, the inner shell 100 can be supported and deformed. Thus, without necessarily thickening the inner shell 100 as a whole, it has the possibility of reducing the risk of local deformation of the inner shell 100 and improving the structural stability.

[0053] Meanwhile, in the above embodiments, the support member 400 is an integrally molded injection molded part, which can reduce the number of related parts of the support structure, reduce the cumulative impact of assembly steps and tolerances, and improve assembly consistency.

[0054] In addition, the support member 400 is located within the first receiving cavity 130 and connected to both ends of the inner housing 100, so that it can serve as a load-bearing base for the arrangement and fixation of other internal components, thereby providing potential support for further functional integration and reducing additional support-type parts.

[0055] In some embodiments, please refer to Figure 1 and Figure 6 The support member 400 includes multiple crossbeams 410 and longitudinal beams 420. The crossbeams 410 extend along a first direction X, and both ends of the crossbeams 410 along the first direction X are respectively connected to the inner shell 100. The multiple crossbeams 410 are spaced apart along a second direction Y. The longitudinal beams 420 extend along the second direction Y, and the longitudinal beams 420 are arranged between two adjacent crossbeams 410 along the second direction Y. Both ends of the longitudinal beams 420 along the second direction Y are respectively connected to a crossbeam 410.

[0056] In the first aspect, in the above embodiment, the support member 400 forms a skeleton that interweaves the first direction X and the second direction Y through a plurality of crossbeams 410 extending along the first direction X and connected to the inner shell 100 at both ends, and longitudinal beams 420 disposed between adjacent crossbeams 410 and connected to the two ends of the crossbeams 410, thereby enabling the stiffness of the inner shell 100 to be improved simultaneously in two orthogonal directions.

[0057] Secondly, in the above embodiments, multiple crossbeams 410 are spaced apart along the second direction Y and cooperate with the longitudinal beams 420 between adjacent crossbeams 410 to form multi-point support, thereby reducing local deflection, improving the uniformity of load distribution and reducing the risk of local stress concentration, and thus improving the reliability of the inner shell 100.

[0058] In some embodiments, the support member 400 further includes at least one of the following: a coolant inlet / outlet nozzle structure, an external protective housing for high-pressure and low-pressure connectors, an internal relay housing for the BDU, and an insulating protective sleeve for the wiring harness and high-voltage copper-aluminum busbar. Furthermore, at least one of the coolant inlet / outlet nozzle structure, the external protective housing for high-pressure and low-pressure connectors, the internal relay housing for the BDU, and the insulating protective sleeve for the wiring harness and high-voltage copper-aluminum busbar is integrally connected to the crossbeam 410 or the longitudinal beam 420.

[0059] In some embodiments, the support member 400 is also provided with a plurality of connection holes for fixing wire harnesses and copper busbars, and can also be used to fix BDU electrical components and other parts.

[0060] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 The battery pack housing also includes an outer shell 500, which includes a second bottom wall 520 and a second side wall 510. The second bottom wall 520 is disposed on the side of the inner shell 100 away from the cover plate 300. The second side wall 510 is connected to the side of the second bottom wall 520 near the cover plate 300 and is disposed around the inner shell 100.

[0061] Specifically, the second bottom wall 520 and the second side wall 510 can form a second receiving cavity 530, and the second side wall 510 can form a second opening 540, so that at least a portion of the inner shell 100 can be disposed in the second receiving cavity 530 through the second opening 540.

[0062] In the above embodiment, the second bottom wall 520 is located on the side of the inner housing 100 away from the cover plate 300 and in the outer bottom region, and the second side wall 510 is arranged around the inner housing 100, thereby forming an outer bottom and side protection and isolation structure, which can protect the bottom and circumference of the inner housing 100. At the same time, it can also improve the overall structural stability and deformation resistance of the battery pack housing.

[0063] In some embodiments, please refer to Figure 1 and Figure 7 The outer shell 500 is an integrally molded injection molded part, and the material of the outer shell 500 includes thermoplastic resin and reinforcing fiber; the second bottom wall 520 is provided with a plurality of third through holes 521; the outer shell 500 also includes a first reinforcing rib 550 and a second reinforcing rib 560, the first reinforcing rib 550 is connected to the second side wall 510 and extends along the circumference of the second side wall 510; the second reinforcing rib 560 is connected to the second side wall 510 and extends along the direction from the cover plate 300 to the second bottom wall 520, and the first reinforcing rib 550 and the second reinforcing rib 560 are arranged crosswise and connected.

[0064] In the first aspect, in the above embodiments, the outer casing 500 is made of thermoplastic resin and reinforcing fiber, and a plurality of third through holes 521 are provided through the second bottom wall 520, which can reduce the weight of the outer casing 500 itself and reduce the overall weight of the battery pack box.

[0065] Secondly, in the above embodiment, the first reinforcing rib 550 extends circumferentially along the second sidewall 510 and the second reinforcing rib 560 extends along the direction from the cover plate 300 to the second bottom wall 520, and the two are intersected and connected to form a grid-like reinforcement system, which can improve the circumferential and vertical stiffness of the outer shell 500, improve shape stability and enhance the resistance to deformation.

[0066] Thirdly, in the above embodiments, the cross-arranged first reinforcing rib 550 and second reinforcing rib 560 can distribute the external load more evenly to a larger area along the extension direction of the first reinforcing rib 550 and the second reinforcing rib 560, thereby improving the battery pack housing's resistance to local indentation, buckling and overall structural stability.

[0067] Fourthly, in the above embodiments, the outer shell 500 is an integrally molded injection molded part, which allows the bottom wall, side wall and reinforcing ribs to be integrally formed, thereby reducing the number of related parts of the outer shell 500, reducing the cumulative impact of assembly steps and tolerances, and improving the consistency of manufacturing and assembly; this direction is consistent with the goal of process simplification and consistency improvement emphasized in the disclosure.

[0068] In some embodiments, the third through hole 521 is a circular hole. See also [link to embodiments]. Figure 7 The third through hole 521 is a regular hexagonal hole.

[0069] In some embodiments, the housing 500 further includes a connecting portion 570, which is connected to the second sidewall 510 and has a through-hole 571.

[0070] The mounting hole 571 facilitates the connection between the battery pack housing and the vehicle body. In some embodiments, the battery pack housing is connected to the vehicle body by inserting a bolt that is connected to the vehicle body through the mounting hole 571.

[0071] In some embodiments, the battery pack housing further includes a connector, and the inner housing 100 is provided with a flange 170 on its periphery. The cover plate 300 and the second side wall 510 are respectively provided on both sides of the flange 170. The connector passes through the flange 170 and connects the cover plate 300 and the second side wall 510 respectively.

[0072] In the above embodiment, the inner shell 100 is provided with a flange 170 around its periphery, the cover plate 300 and the second side wall 510 are respectively placed on both sides of the flange 170, and the connector passes through the flange 170 and connects the cover plate 300 and the second side wall 510 respectively, thereby forming a stacked connection relationship, which makes the connection stability between the cover plate 300, the flange 170 and the second side wall 510 better.

[0073] In addition, in the above embodiments, the stacked connection relationship facilitates the clamping connection, that is, the connection method of the cover plate 300 and the second side wall 510 clamping the flange 170, thereby facilitating the establishment of a sealing interface between the flange 170 and the cover plate 300, and allowing the battery pack housing to obtain better sealing performance.

[0074] In some embodiments, the battery pack housing further includes a bottom protective plate connected to the side of the second bottom wall 520 opposite to the inner housing 100.

[0075] Firstly, in the above embodiment, the bottom protective plate is connected to the side of the second bottom wall 520 away from the inner shell 100, so that the bottom protective plate is located in the outer bottom area, thereby being able to preferentially bear the external load and protect the second bottom wall 520 under working conditions such as flying stone impact and bottom scraping, which can improve the protection capability of the outer bottom of the battery pack box.

[0076] Secondly, in the above embodiments, after the bottom guard plate is connected to the second bottom wall 520, the external load can be diffused on the bottom guard plate and then transferred to the second bottom wall 520, thereby reducing the degree of direct impact on the second bottom wall 520 and reducing the risk of local damage.

[0077] In some embodiments, the cover plate 300 is also provided with a plurality of protruding ridges, a portion of which extends along a first direction X and a portion of which extends along a second direction Y. The plurality of protruding ridges can improve the rigidity and structural strength of the cover plate 300.

[0078] In some embodiments, the thermoplastic resin includes one or more of polypropylene, polyamide, polybutylene terephthalate, polyethylene terephthalate, polycarbonate, polystyrene, acrylonitrile-butadiene-styrene copolymer, polyphenylene sulfide, polyetheretherketone, and polyetherimide.

[0079] The polypropylene, polyamide, polybutylene terephthalate, polyethylene terephthalate, polycarbonate, polystyrene, acrylonitrile-butadiene-styrene copolymer, polyphenylene sulfide, polyetheretherketone, and polyetherimide in the above embodiments can all be formed after heating and softening, and shaped after cooling. They are suitable for injection molding, compression molding, hot pressing, secondary forming and other process paths, which are generally beneficial to shorten the forming cycle and improve batch consistency.

[0080] Furthermore, these materials are easier to integrate functionally in terms of processing, such as first forming the sheet / shell and then performing secondary injection molding, thereby reducing the number of parts and assembly steps.

[0081] In addition, these materials can be remelted and processed, making the reuse path of scraps and recycled materials clearer.

[0082] The reinforcing fibers include one or more of glass fibers, aramid fibers, carbon fibers, boron fibers, natural fibers, basalt fibers, and ceramic fibers.

[0083] The glass fiber, aramid fiber, carbon fiber, boron fiber, natural fiber, basalt fiber, and ceramic fiber in the above embodiments all possess high tensile strength and elastic modulus, enabling them to bear the main load in composite materials, improve the stiffness of structural components, and suppress deformation. Furthermore, they can be directionally laid, easily forming in-plane or frame-type load-bearing paths, thereby improving specific strength and specific stiffness. In some embodiments, the inner shell 100, cover plate 300, and support member 400 are supported by one-step compression molding and two-step compression molding, respectively.

[0084] In the one-step compression molding process, the product undergoes both compression molding and injection molding in the same mold.

[0085] Using a one-step compression molding process can increase the bonding strength between the molded and injection molded parts, resulting in better integrity for the inner shell 100, cover plate 300, or support component 400 manufactured by this process. Furthermore, the manufacturing process requires only one mold, saving on mold development costs and reducing the number of machines needed.

[0086] In the two-step compression molding process, compression molds and injection molds are used separately. After compression molding is completed, the molded part is placed into the injection mold as an insert to complete the injection molding.

[0087] Using a two-step compression molding and injection molding process can reduce the difficulty of mold development. At the same time, because the compression molding and injection molding processes are separated, the time of each individual process can be reduced, the process cycle time can be increased, and production efficiency can be improved.

[0088] Accordingly, this application also provides a vehicle including a battery pack housing as described in any of the above embodiments.

[0089] The battery pack housing and vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack housing, characterized in that, include: The inner housing (100) has a first receiving cavity (130) forming a first opening (140) in the inner housing (100), and the inner housing (100) has a groove (150) communicating with the first receiving cavity (130). A heat-conducting plate (200) is disposed in the first receiving cavity (130) and covers the groove (150). A cover plate (300) is connected to the inner shell (100) and covers the first opening (140). The cover plate (300) is spaced apart from the heat-conducting plate (200).

2. The battery pack housing according to claim 1, characterized in that, The inner shell (100) is an integrally molded part, and the material of the inner shell (100) includes thermoplastic resin and reinforcing fiber; The cover plate (300) is an integrally molded part, and the material of the cover plate (300) includes thermoplastic resin and reinforcing fiber.

3. The battery pack housing according to claim 1, characterized in that, The inner housing (100) includes: First bottom wall (120); The first sidewall (110) surrounds the first opening (140) and is connected to the first bottom wall (120) to form the first receiving cavity (130). The cover plate (300) is connected to the first sidewall (110). The first bottom wall (120) protrudes in a direction away from the cover plate (300), and a groove (150) is formed on the side of the first bottom wall (120) facing the cover plate (300), and a protrusion (160) is formed on the side of the first bottom wall (120) away from the cover plate (300).

4. The battery pack housing according to claim 3, characterized in that, The inner housing (100) has a plurality of grooves (150), a portion of which are first grooves (151) and a portion of which are second grooves (152). The first grooves (151) and the second grooves (152) are connected. The first grooves (151) extend along a first direction (X). The plurality of first grooves (151) are spaced apart along a second direction (Y). The second grooves (152) extend along the second direction (Y). The plurality of second grooves (152) are spaced apart along the first direction (X). The cover plate (300) is connected to one side of the inner housing (100) along a third direction (Z). The first direction (X), the second direction (Y), and the third direction (Z) are perpendicular to each other.

5. The battery pack housing according to claim 1, characterized in that, The heat-conducting plate (200) has a first through hole and a second through hole that are respectively connected to the groove (150).

6. The battery pack housing according to claim 1, characterized in that, The battery pack housing also includes a support member (400), which is disposed in the first receiving cavity (130). The two ends of the support member (400) along at least one of the first direction (X) and the second direction (Y) are respectively connected to the inner shell (100). The support member (400) is an integrally molded injection molded part, and the material of the support member (400) includes thermoplastic resin and reinforcing fiber.

7. The battery pack housing according to claim 6, characterized in that, The support member (400) includes: Multiple crossbeams (410) extend along a first direction (X), and the two ends of the crossbeams (410) along the first direction (X) are respectively connected to the inner shell (100), and the multiple crossbeams (410) are spaced apart along a second direction (Y); A longitudinal beam (420) extends along the second direction (Y) and is disposed between two adjacent crossbeams (410) along the second direction (Y). The two ends of the longitudinal beam (420) along the second direction (Y) are respectively connected to a crossbeam (410).

8. The battery pack housing according to claim 1, characterized in that, The battery pack housing also includes an outer shell (500), the outer shell (500) comprising: The second bottom wall (520) is disposed on the side of the inner housing (100) opposite to the cover plate (300); The second sidewall (510) is connected to the side of the second bottom wall (520) near the cover plate (300) and is disposed around the inner housing (100).

9. The battery pack housing according to claim 8, characterized in that, The outer shell (500) is an integrally molded injection molded part, and the material of the outer shell (500) includes thermoplastic resin and reinforcing fiber; The second bottom wall (520) is provided with a plurality of third through holes (521); The outer casing (500) also includes: The first reinforcing rib (550) is connected to the second sidewall (510) and extends along the circumference of the second sidewall (510); The second reinforcing rib (560) is connected to the second side wall (510) and extends along the direction from the cover plate (300) to the second bottom wall (520). The first reinforcing rib (550) and the second reinforcing rib (560) are arranged and connected to each other.

10. The battery pack housing according to claim 8, characterized in that, The outer casing (500) further includes a connecting part (570) connected to the second side wall (510), and the connecting part (570) has a through fixing hole (571).

11. The battery pack housing according to claim 8, characterized in that, The battery pack housing also includes a connector. The inner shell (100) is provided with a flange (170) on its periphery. The cover plate (300) and the second side wall (510) are respectively provided on both sides of the flange (170). The connector passes through the flange (170) and connects the cover plate (300) and the second side wall (510) respectively.

12. The battery pack housing according to claim 8, characterized in that, The battery pack housing also includes a bottom protective plate, which is connected to the side of the second bottom wall (520) away from the inner housing (100).

13. The battery pack housing according to claim 2 or 6, characterized in that, The thermoplastic resin includes one or more of the following: polypropylene, polyamide, polybutylene terephthalate, polyethylene terephthalate, polycarbonate, polystyrene, acrylonitrile-butadiene-styrene copolymer, polyphenylene sulfide, polyetheretherketone, and polyetherimide. The reinforcing fibers include one or more of glass fibers, aramid fibers, carbon fibers, boron fibers, natural fibers, basalt fibers, and ceramic fibers.

14. A vehicle, characterized in that, Includes the battery pack housing as described in any one of claims 1 to 13.

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