Box assembly and battery pack

Abstract

The utility model provides a kind of box assembly and battery pack, the box assembly includes box and cooling member;Box includes bottom plate, two cross beams and two longitudinal beams, two cross beams are connected to the both ends of bottom plate and are oppositely arranged, two longitudinal beams are connected to the both sides of bottom plate and are oppositely arranged, to form containing cavity;Liquid cooling member includes multiple liquid cooling plates, multiple liquid cooling plates are detachably connected between two cross beams to divide containing cavity into multiple containing sub-cavity, containing sub-cavity is used to install battery module;Wherein, cross beam, longitudinal beam and liquid cooling plate are interconnected to form the flow path of cooling medium, to reduce the arrangement space of cooling pipeline inside box, increase the space that can be used for setting battery module inside box and the capacity of battery module, to further improve the energy density of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a housing assembly and a battery pack. Background Technology

[0002] With the increasing demand for fast charging and high energy density in new energy vehicles, especially electric commercial vehicles, the thermal management system of power batteries has become one of the key aspects of battery pack design. Liquid cooling systems are widely used in power battery packs due to their excellent heat exchange efficiency.

[0003] Currently, in related technologies, liquid cooling systems typically employ the method of arranging liquid cooling pipes inside the battery pack to connect multiple liquid cooling plates or cooling components, thereby effectively cooling the battery modules. However, to arrange these liquid cooling pipes, considerable space often needs to be reserved inside the battery pack. This not only compresses the area available for cell placement and limits the space utilization rate of the battery pack, but also reduces the energy density of the battery pack. Utility Model Content

[0004] The present invention provides a battery pack and electrical equipment. The battery module is cooled by a liquid cooling circuit composed of a crossbeam, a liquid cooling plate, and a longitudinal beam. This eliminates the need for cooling pipes, increases the space inside the housing for battery modules and the capacity of the battery modules, thereby improving the energy density of the battery pack.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a housing assembly is provided, comprising:

[0006] The box body includes a bottom plate, two crossbeams and two longitudinal beams. The two crossbeams are connected to both ends of the bottom plate and are arranged opposite to each other. The two longitudinal beams are connected to both sides of the bottom plate and are arranged opposite to each other to form a receiving cavity.

[0007] A liquid cooling component includes multiple liquid cooling plates, which are detachably connected between two crossbeams to divide the receiving cavity into multiple receiving sub-cavities, the receiving sub-cavities being used to install battery modules;

[0008] The crossbeam, the longitudinal beam, and the liquid cooling plate are interconnected to allow the cooling medium to flow through them.

[0009] According to one embodiment of the present invention, the two crossbeams include a first crossbeam and a second crossbeam;

[0010] The cooling medium flows sequentially into the first crossbeam, the plurality of liquid cooling plates, the second crossbeam, and at least one longitudinal beam.

[0011] According to one embodiment of the present invention, the cooling medium flows sequentially into the first crossbeam, the plurality of liquid cooling plates, the second crossbeam, and at least one longitudinal beam, and then flows out from the first crossbeam.

[0012] According to one embodiment of the present invention, each of the crossbeams is provided with a first crossbeam flow channel and a second crossbeam flow channel arranged at intervals; each of the liquid cooling plates is provided with a liquid cooling flow channel.

[0013] The cooling medium flows sequentially into the first crossbeam channel of the first crossbeam, the liquid cooling channels of the plurality of liquid cooling plates, the second crossbeam channel of the second crossbeam, and at least one of the longitudinal beams, before flowing out of the second crossbeam channel of the first crossbeam.

[0014] According to one embodiment of the present invention, the first crossbeam is provided with an inlet and an outlet, and the inlet is connected to the first crossbeam flow channel of the first crossbeam, and the outlet is connected to the second crossbeam flow channel of the first crossbeam.

[0015] The second crossbeam flow channel is located on the side of the first crossbeam flow channel that is close to the bottom plate.

[0016] According to one embodiment of the present invention, a plurality of first mounting holes are provided on the first crossbeam, and the plurality of first mounting holes are all connected to the first crossbeam flow channel of the first crossbeam; a plurality of second mounting holes are provided on the second crossbeam, and the plurality of second mounting holes are all connected to the second crossbeam flow channel of the second crossbeam.

[0017] Wherein, one end of the liquid cooling plate is inserted into the first mounting hole, and the liquid cooling channel of the liquid cooling plate is connected to the first crossbeam channel through the first mounting hole; the other end of the liquid cooling plate is inserted into the second mounting hole, and the liquid cooling channel of the liquid cooling plate is connected to the second crossbeam channel through the second mounting hole.

[0018] According to one embodiment of the present invention, the liquid cooling plate includes a liquid cooling main plate and two connectors disposed at both ends of the liquid cooling main plate. The liquid cooling main plate is provided with the liquid cooling channel, and the two connectors are respectively connected to both ends of the liquid cooling channel.

[0019] One of the connectors is inserted into the first mounting hole and communicates with the first liquid cooling channel, while the other connector is inserted into the second mounting hole and communicates with the second liquid cooling channel.

[0020] According to one embodiment of the present invention, at least one of the longitudinal beams is provided with a longitudinal beam flow channel;

[0021] The cooling medium flows sequentially into the longitudinal beam channel of the first crossbeam, the plurality of liquid cooling plates, the second crossbeam, and at least one longitudinal beam.

[0022] According to one embodiment of the present invention, the second crossbeam flow channel extends through the crossbeam along the first direction, and the second crossbeam flow channel includes two first openings disposed opposite to each other along the first direction;

[0023] The longitudinal beam has two second openings on the side near the crossbeam. The second openings are connected to the flow channel of the longitudinal beam, and one of the second openings is connected to the first opening of the first crossbeam, while the other second opening is connected to the first opening of the second crossbeam.

[0024] According to a second aspect of the present invention, a battery pack is provided, including the housing assembly described in the first aspect embodiment.

[0025] The beneficial effects of the embodiments of this utility model are as follows:

[0026] This utility model provides a housing assembly and a battery pack. The housing assembly includes a housing and a cooling component. The housing includes a base plate, two crossbeams, and two longitudinal beams. The two crossbeams are connected to both ends of the base plate and are arranged opposite to each other. The two longitudinal beams are connected to both sides of the base plate and are arranged opposite to each other to form a receiving cavity. The liquid cooling component includes multiple liquid cooling plates, which are detachably connected between the two crossbeams to divide the receiving cavity into multiple receiving sub-cavities. The receiving sub-cavities are used to install battery modules. The crossbeams, longitudinal beams, and liquid cooling plates are interconnected to form a flow path for the cooling medium, thereby reducing the space required for the arrangement of cooling pipes inside the housing, increasing the space available for installing battery modules and the capacity of the battery modules inside the housing, and thus improving the energy density of the battery pack. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0028] To gain a more complete understanding of this utility model 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.

[0029] Figure 1 A schematic diagram of the battery pack provided in an embodiment of this utility model;

[0030] Figure 2 A schematic diagram of the structure of the housing assembly provided in an embodiment of this utility model;

[0031] Figure 3 An exploded view of the housing assembly provided in an embodiment of this utility model;

[0032] Figure 4 Provided for the embodiments of this utility model Figure 2 Schematic diagram of the cross section at point AA'

[0033] Figure 5 A schematic diagram of the structure of the first crossbeam provided in an embodiment of this utility model;

[0034] Figure 6 Provided for the embodiments of this utility model Figure 5 Schematic diagram of the cross section at point BB';

[0035] Figure 7 A schematic diagram of the structure of the second crossbeam provided for an embodiment of this utility model;

[0036] Figure 8 Provided for the embodiments of this utility model Figure 7 Cross-sectional diagram at CC'

[0037] Figure 9 A schematic diagram of the structure of the liquid cooling plate provided in an embodiment of this utility model;

[0038] Figure 10 A schematic diagram of the longitudinal beam provided for an embodiment of this utility model;

[0039] Figure 11 Provided for the embodiments of this utility model Figure 10 A schematic diagram of the cross-section at point DD'.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Battery pack; 10-Box assembly; 11-Receiving cavity; 111-Receiving sub-cavity; 12-Box body; 121-Base plate; 122-Crossbeam; 1221 First crossbeam flow channel; 1222-Second crossbeam flow channel; 1223-First opening; 122A-First crossbeam; 122A1-First mounting hole; 122B-Second crossbeam; 122B1-Second mounting hole; 1224-Crossbeam body; 1225-First reinforcing part; 1225A-First reinforcing cavity; 12 3-Longitudinal beam; 1231-Longitudinal beam flow channel; 1232-Second opening; 1233-Third opening; 1234-Longitudinal beam body; 1235-Second reinforcing part; 1235A-Second reinforcing cavity; 13-Liquid cooling component; 131-Liquid cooling plate; 1311-Liquid cooling flow channel; 1312-Liquid cooling main board; 1313-Connector; 14-Liquid inlet; 15-Liquid outlet; 20-Battery module; 21-Cell assembly; 30-Sealing part; X-First direction; Y-Second direction. Detailed Implementation

[0042] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this utility model and are not intended to limit this utility model. In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0043] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4 ;in, Figure 1 This is a schematic diagram of the structure of the battery pack 1 provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of the housing assembly 10 provided in an embodiment of this utility model; Figure 3 An exploded view of the housing assembly 10 provided in an embodiment of this utility model; Figure 4 Provided for the embodiments of this utility model Figure 2 A schematic diagram of the cross-section at point AA'.

[0044] like Figures 1 to 4As shown, this embodiment provides a battery pack 1, which includes a housing assembly 10 and a battery module 20; the housing assembly 10 includes a receiving cavity 11 for receiving the battery module 20.

[0045] The enclosure assembly 10 includes an enclosure 12 and a liquid cooling component 13. The enclosure 12 includes a base plate 121, two crossbeams 122 and two longitudinal beams 123. The two crossbeams 122 are connected to both ends of the base plate 121 and are arranged opposite to each other. The two longitudinal beams 123 are connected to both sides of the base plate 121 and are arranged opposite to each other to form the receiving cavity 11. The two crossbeams 122 are arranged opposite to each other along the length direction of the enclosure assembly 10, and the two longitudinal beams 123 are arranged opposite to each other along the width direction of the enclosure assembly 10. The two crossbeams 122 and the two longitudinal beams 123 are fixedly installed on the edge of the base plate 121.

[0046] The battery module 20 is disposed within the receiving cavity 11. The battery module 20 includes a plurality of cell assemblies 21 spaced apart along a first direction X. The first direction X intersects the height direction of the housing assembly 10. Each cell assembly 21 includes a plurality of cells arranged sequentially along a second direction Y. The second direction Y intersects a reference plane formed by the first direction X and the height direction of the housing assembly 10. The second direction Y can be the length direction of the battery pack 1, and the first direction X can be the width direction of the battery pack 1.

[0047] The liquid cooling component 13 includes a plurality of liquid cooling plates 131, which are detachably connected between the two crossbeams 122 to divide the receiving cavity 11 into a plurality of receiving sub-cavities 111 along the first direction X. Each receiving sub-cavity 111 is used to install a corresponding battery cell assembly 21. The plurality of liquid cooling plates 131 are spaced apart along the first direction X, and each liquid cooling plate 131 is disposed between two adjacent battery cell assemblies 21. The liquid cooling plates 131 can directly contact the sidewalls of the battery cell assembly 21, thereby forming a sandwich-type heat dissipation structure to achieve multi-faceted cooling of the battery cell assembly 21.

[0048] It should be noted that the liquid cooling plate 131 can directly contact the side wall of the battery cell assembly 21; this is only used to illustrate the relative spatial distance between the two. In another embodiment, a thermally conductive medium such as thermally conductive adhesive can also be provided between the liquid cooling plate 131 and the battery cell assembly 21 to further enhance the heat conduction efficiency between the battery cell and the liquid cooling plate 131, thereby achieving a faster and more uniform heat dissipation effect.

[0049] Furthermore, the crossbeam 122, the longitudinal beam 123, and the liquid cooling plate 131 are interconnected to form a flow path for the cooling medium. The cooling medium can circulate among the crossbeam 122, the longitudinal beam 123, and the liquid cooling plate 131, and exchange heat with the battery cell assembly 21 within the liquid cooling plate 131, thereby achieving uniform cooling of each of the battery cell assemblies 21; wherein, the cooling medium may include coolant, refrigerant, or other fluid media with thermal conductivity, suitable for precise control of the battery cell temperature.

[0050] Understandably, in related technologies, cooling plates are typically fixed to the housing 12 of the battery pack 1, and have internal liquid flow channels. Multiple cooling plates are connected by liquid cooling pipes arranged inside the battery pack 1 to effectively cool the battery module 20. However, to arrange the liquid cooling pipes, a large amount of space needs to be reserved inside the housing 12 of the battery pack 1. This not only compresses the cell placement area and limits space utilization, but also reduces the overall energy density of the battery pack 1. At the same time, the liquid cooling pipes corresponding to multiple cooling plates are staggered in a limited space, which is prone to friction and collision, increasing the risk of system leakage and jeopardizing the safe operation of the liquid cooling system.

[0051] Continuing from the above, this embodiment interconnects the crossbeam 122, the longitudinal beam 123, and the liquid cooling plate 131 to allow the cooling medium to flow through, eliminating the need for separate cooling pipes inside the housing 12. This frees up internal space in the housing 12, allowing more battery cell components 21 to be accommodated within the same housing size, thereby increasing the capacity density and energy density of the battery pack 1 and meeting the needs of high-power output and long-range applications. Simultaneously, it simplifies the assembly process of the battery pack 1, avoids the staggered arrangement of liquid cooling pipes on the inner wall of the housing 12, and reduces the risk of cooling medium leakage due to friction or impact.

[0052] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 ;in, Figure 5 A schematic diagram of the structure of the first crossbeam 122A provided for an embodiment of this utility model; Figure 6 Provided for the embodiments of this utility model Figure 5 Schematic diagram of the cross section at point BB'; Figure 7 A schematic diagram of the structure of the second crossbeam 122B provided for an embodiment of this utility model; Figure 8 Provided for the embodiments of this utility model Figure 7 A schematic diagram of the cross-section at CC'.

[0053] In one embodiment, the two crossbeams 122 include a first crossbeam 122A and a second crossbeam 122B; wherein the cooling medium flows sequentially into the first crossbeam 122A, a plurality of liquid cooling plates 131, the second crossbeam 122B and at least one longitudinal beam 123, thereby forming a continuous cooling circuit within the housing assembly 10 to achieve thermal management of the battery cell assembly 21.

[0054] Specifically, the first crossbeam 122A may have an inlet 14 for the cooling medium to enter, and the cooling medium can flow into the interior of the first crossbeam 122A through the inlet 14; both ends of each liquid cooling plate 131 are respectively connected to the first crossbeam 122A and the second crossbeam 122B, so that the cooling medium can flow from the first crossbeam 122A into the liquid cooling channels inside the multiple liquid cooling plates 131; wherein, during the process of the cooling medium flowing through the liquid cooling plate 131, the heat generated by the battery cell assembly 21 can be conducted to the liquid cooling plate 131 and carried away by the liquid cooling medium, thereby achieving efficient heat dissipation of the battery cell assembly 21.

[0055] The second crossbeam 122B can serve as a collection channel for the cooling medium, collecting the cooling medium flowing out of the multiple liquid cooling plates 131 and guiding it into at least one longitudinal beam 123. The longitudinal beam 123 can be connected to an external circulation system to discharge the cooling medium that has completed heat exchange from the housing 12 and then transport it to an external heat dissipation device (such as a condenser, radiator, etc.) for heat release. In addition, the cooling medium that has completed heat dissipation can flow back into the first crossbeam 122A to realize the recycling of the cooling medium.

[0056] Specifically, the first crossbeam 122A may also have an outlet 15 for the cooling medium to flow out. The outlet 15 is spaced apart from the inlet 14. After the cooling medium enters the first crossbeam 122A from the inlet 14, it flows sequentially into multiple liquid cooling plates 131, the second crossbeam 122B, and at least one longitudinal beam 123, and then flows out from the first crossbeam 122A, thereby forming a cooling circuit. This allows the cooling medium to flow between multiple liquid cooling plates 131 and exchange heat with multiple battery cell components 21 in sequence, ensuring that the heat generated by each battery cell component 21 during operation is fully absorbed and carried away in time, thereby achieving temperature rise control and thermal balance management of the battery pack 1.

[0057] Meanwhile, the longitudinal beam 123 is disposed between the first crossbeam 122A and the second crossbeam 122B, serving as a return channel for the cooling medium, and is used to guide the cooling medium flowing out of the second crossbeam 122B back to the first crossbeam 122A. By disposing of the longitudinal beam 123 between the first crossbeam 122A and the second crossbeam 122B, the flow path of the cooling medium can be extended, the cooling coverage area of ​​the cooling medium on the cell assembly 21 can be enhanced, and the accuracy and stability of the temperature control of the battery pack 1 can be further improved, thereby improving the thermal safety performance and service life of the battery module 20 and reducing the risk of thermal runaway.

[0058] Please continue to combine Figures 1 to 8 In one embodiment, each of the crossbeams 122 is provided with a first crossbeam flow channel 1221 and a second crossbeam flow channel 1222 spaced apart. The first crossbeam flow channel 1221 and the second crossbeam flow channel 1222 are respectively used for the input and output of the cooling medium. Each of the liquid cooling plates 131 is provided with a liquid cooling flow channel 1311 for heat exchange of the cooling medium. The cooling medium flows sequentially into the first crossbeam flow channel 1221 of the first crossbeam 122A, the liquid cooling flow channels 1311 of the plurality of liquid cooling plates 131, the second crossbeam flow channel 1222 of the second crossbeam 122B, and at least one longitudinal beam 123, and then flows out of the second crossbeam flow channel 1222 of the first crossbeam 122A, thereby realizing thermal management of the plurality of battery cell components 21.

[0059] Specifically, the cooling medium first flows into the first crossbeam channel 1221 of the first crossbeam 122A, and is then distributed within the first crossbeam channel 1221 to multiple liquid cooling plates 131, and enters the liquid cooling channels 1311 of the multiple liquid cooling plates 131 respectively. During the flow of the cooling medium through the liquid cooling channels 1311, the cooling medium exchanges heat with the battery cells in the battery module 20, and the cooled medium, after absorbing heat, flows into the second crossbeam channel 1222 of the second crossbeam 122B; subsequently, the cooling... The cooling medium continues to flow into at least one of the longitudinal beams 123, forming a return channel inside the longitudinal beam 123, and eventually flows back to the second crossbeam flow channel 1222 of the first crossbeam 122A, thereby completing the cooling cycle of the battery module 20. This achieves a three-stage "in-out-return" flow path for the cooling medium within the housing assembly 10, enabling the battery module 20 to more effectively conduct heat to the cooling medium and carry it away during operation, thereby enhancing the thermal safety performance of the battery module 20, extending its service life, and reducing the risk of thermal runaway.

[0060] Please continue to combine Figures 1 to 8In one embodiment, the first crossbeam 122A is provided with a liquid inlet 14 and a liquid outlet 15. The liquid inlet 14 is connected to the first crossbeam flow channel 1221 of the first crossbeam 122A, and the liquid outlet 15 is connected to the second crossbeam flow channel 1222 of the first crossbeam 122A, thereby realizing the input and output of the cooling medium.

[0061] Specifically, the liquid inlet 14 and the liquid outlet 15 are both located on the side of the first crossbeam 122A away from the battery module 20. The cooling medium can flow into the first crossbeam 122A through the liquid inlet 14 and be distributed to multiple liquid cooling plates 131 through the first crossbeam flow channel 1221, thereby achieving simultaneous cooling of multiple battery cell assemblies 21. After absorbing heat in the liquid cooling plate 131, the cooling medium gathers in the second crossbeam flow channel 1222 of the second crossbeam 122B, and is then guided back to the second crossbeam flow channel 1222 of the first crossbeam 122A through at least one longitudinal beam 123, and finally discharged from the liquid outlet 15 on the first crossbeam 122A.

[0062] Furthermore, the second crossbeam flow channel 1222 is located on the side of the first crossbeam flow channel 1221 near the bottom plate 121, thereby forming a dual-channel structure with upper and lower separation inside the crossbeam 122; wherein, the first crossbeam flow channel 1221 located at the upper part is used to distribute the cooling medium to the inlet of each of the liquid cooling plates 131, and the second crossbeam flow channel 1222 located at the lower part is used to collect the cooling medium from the outlet of the liquid cooling plate 131; through the dual-channel structure with upper and lower distribution, the inlet and outlet flow paths of the cooling medium inside the crossbeam 122 are separated, avoiding interference or backflow of the cooling medium inside the crossbeam 122, thereby improving the stability and heat exchange efficiency of the cooling medium during the flow process.

[0063] Furthermore, since the second crossbeam flow channel 1222 is located close to the bottom plate 121, after the heat exchange between the cooling medium and the battery module 20, the cooling medium can naturally flow from the liquid cooling plate 131 to the second crossbeam flow channel 1222 under the guidance of gravity and pressure difference, thereby more efficiently collecting the return cooling medium from multiple liquid cooling plates 131 and reducing the stagnation and turbulence of the cooling ring in the liquid cooling plate 131.

[0064] It should be noted that "located at the upper part" means that the first crossbeam flow channel 1221 is further away from the bottom plate 121 in the height direction of the housing assembly 10 relative to the second crossbeam flow channel 1222; "located at the lower part" means that the second crossbeam flow channel 1222 is closer to the bottom plate 121 in the height direction of the housing assembly 10 relative to the first crossbeam flow channel 1221.

[0065] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 ;in, Figure 9 This is a schematic diagram of the structure of the liquid cooling plate 131 provided in an embodiment of the present invention. In one embodiment, the first crossbeam 122A has a plurality of first mounting holes 122A1, and the plurality of first mounting holes 122A1 are all connected to the first crossbeam flow channel 1221 of the first crossbeam 122A; the second crossbeam 122B has a plurality of second mounting holes 122B1, and the plurality of second mounting holes 122B1 are all connected to the second crossbeam flow channel 1222 of the second crossbeam 122B; wherein, one end of the liquid cooling plate 131 is inserted into the first The liquid cooling plate 131 is connected to the first crossbeam 122A through the mounting hole 122A1, thereby enabling the liquid cooling channel 1311 of the liquid cooling plate 131 to communicate with the first crossbeam channel 1221 through the first mounting hole 122A1; the other end of the liquid cooling plate 131 is inserted into the second mounting hole 122B1, thereby enabling the liquid cooling plate 131 to connect with the second crossbeam 122B, thereby enabling the liquid cooling channel 1311 of the liquid cooling plate 131 to communicate with the second crossbeam channel 1222 through the second mounting hole 122B1.

[0066] Specifically, the first mounting hole 122A1 is located on the side of the first crossbeam 122A away from the base plate 121. The first mounting hole 122A1 penetrates a portion of the first crossbeam 122A in the direction from the first crossbeam 122A to the base plate 121, and the first mounting hole 122A1 communicates with the first crossbeam flow channel 1221 of the first crossbeam 122A. The second mounting hole 122B1 penetrates a portion of the second crossbeam 122B in the direction from the second crossbeam 122B to the base plate 121. The second crossbeam 122B penetrates the first crossbeam flow channel 1221 of the second crossbeam 122B, and the second mounting hole 122B1 communicates with the second crossbeam flow channel 1222 of the second crossbeam 122B.

[0067] The liquid cooling channel 1311 of the liquid cooling plate 131 is connected to the first crossbeam channel 1221 through the first mounting hole 122A1 to receive the cooling medium from the first crossbeam 122A. After the cooling medium completes the heat exchange process with the cell assembly 21, the cooling medium in the liquid cooling plate 131 flows into the second crossbeam channel 1222 of the second crossbeam 122B through the second mounting hole 122B1, thereby forming a flow path from the first crossbeam 122A, the liquid cooling plate 131, and the second crossbeam 122B.

[0068] It is understood that in this embodiment, by setting the liquid cooling channel 1311 of the liquid cooling plate 131 to be connected to the first crossbeam channel 1221 through the first mounting hole 122A1, and the liquid cooling channel 1311 of the liquid cooling plate 131 to be connected to the second crossbeam channel 1222 through the second mounting hole 122B1, the cooling medium is distributed to multiple liquid cooling plates 131 through the first crossbeam channel 1221 of the first crossbeam 122A, and then collected by the second crossbeam channel 1222 of the second crossbeam 122B. This achieves the parallel flow of the cooling medium among multiple liquid cooling plates 131, avoiding the problems of pressure drop accumulation and uneven heat conduction that may occur in a series structure.

[0069] Meanwhile, by setting one end of the liquid cooling plate 131 to be inserted into the first mounting hole 122A1 and the other end of the liquid cooling plate 131 to be inserted into the second mounting hole 122B1, the liquid cooling plate 131 can be quickly inserted and removed, simplifying the installation and disassembly process of the liquid cooling plate 131. The number of the first mounting holes 122A1 and the number of the second mounting holes 122B1 can be flexibly adjusted according to the number of battery modules 20, thereby making it suitable for battery packs of various specifications and improving the expandability and compatibility of the housing assembly 10.

[0070] Furthermore, the liquid cooling plate 131 includes a liquid cooling main plate 1312 and two connectors 1313 disposed at both ends of the liquid cooling main plate 1312. The liquid cooling main plate 1312 is provided with a liquid cooling channel 1311, and the two connectors 1313 are respectively connected to both ends of the liquid cooling channel 1311. One connector 1313 is inserted into the first mounting hole 122A1 and connected to the first liquid cooling channel, and the other connector 1313 is inserted into the second mounting hole 122B1 and connected to the second liquid cooling channel. This realizes the bridging connection between the liquid cooling main plate 1312 and the first crossbeam 122A and the second crossbeam 122B, and completes the flow path of the cooling medium from the first crossbeam 122A into the liquid cooling plate 131, and then from the liquid cooling plate 131 out to the second crossbeam 122B.

[0071] It is understandable that by setting the pluggable connector 1313, the liquid cooling plate 131 has good positioning, sealing and maintenance convenience during assembly; in addition, the connector 1313 can be further used with sealing rings, snap-fit ​​structures or threaded structures to seal and fix, ensuring the pressure resistance and leakage reliability of the interface during long-term operation.

[0072] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 ;in, Figure 10 A schematic diagram of the structure of the longitudinal beam 123 provided in an embodiment of this utility model;

[0073] Figure 11 Provided for the embodiments of this utility model Figure 10 A cross-sectional schematic diagram at point DD'. In one embodiment, at least one of the longitudinal beams 123 is provided with a longitudinal beam flow channel 1231; wherein, the cooling medium flows sequentially into the first crossbeam 122A, a plurality of liquid cooling plates 131, the second crossbeam 122B, and the longitudinal beam flow channel 1231 of at least one of the longitudinal beams 123, thereby forming a continuous cooling circuit within the housing assembly 10 to achieve thermal management of the battery cell assembly 21.

[0074] Specifically, the cooling medium first enters the first crossbeam flow channel 1221 of the first crossbeam 122A through the liquid inlet 14, and is distributed along the first crossbeam flow channel 1221 to the first connectors 1313 of the multiple liquid cooling plates 131. The cooling medium flows into the liquid cooling main board 1312 through the first connectors 1313, and after heat exchange with the battery cell assembly 21 through the liquid cooling flow channel 1311 of the liquid cooling main board 1312, it flows out through the second connectors 1313 of the liquid cooling plate 131 to the second crossbeam flow channel 1222 of the second crossbeam 122B. Subsequently, the cooling medium is collected by the second crossbeam 122B and continues to flow into the longitudinal beam flow channel 1231 of at least one longitudinal beam 123, realizing the multi-stage conduction and distribution process of the cooling medium from the first crossbeam 122A, the liquid cooling plate 131, the second crossbeam 122B, and the longitudinal beam 123.

[0075] Furthermore, both longitudinal beams 123 are provided with longitudinal beam flow channels 1231; the second crossbeam flow channel 1222 penetrates the crossbeam 122 along the first direction X, and the second crossbeam flow channel 1222 includes two first openings 1223 arranged opposite to each other along the first direction X; the longitudinal beam 123 has two second openings 1232 on the side near the crossbeam 122, the second openings 1232 communicate with the longitudinal beam flow channels 1231, and one of the second openings 1232 communicates with the first opening 1233 of the first crossbeam 122A. The second opening 1223 is connected to the first opening 1223 of the second crossbeam 122B, so that after the cooling medium completes the cooling cycle of the multiple liquid cooling plates 131, it can enter the two longitudinal beams 123 from the second crossbeam 122B, and then flow into the second crossbeam flow channel 1222 of the first crossbeam 122A through the longitudinal beam flow channel 1231 of the longitudinal beam 123, and be discharged from the box assembly 10 from the liquid outlet 15, thereby realizing the spatial extension and path closure of the cooling circuit.

[0076] Specifically, the longitudinal beam flow channel 1231 extends through the longitudinal beam 123 along the second direction Y, thereby extending the flow path of the cooling medium, enhancing the cooling coverage area of ​​the cooling medium on the battery cell assembly 21, and thus improving the flow path and heat exchange efficiency of the cooling medium in the longitudinal beam 123; at the same time, it allows the cooling medium to smoothly transition from the longitudinal beam flow channel 1231 to the second crossbeam flow channel 1222 of the first crossbeam 122A, ensuring the continuity of the cooling medium flow.

[0077] Please continue to combine Figures 1 to 11In one embodiment, the longitudinal beam 123 includes two third openings 1233 arranged opposite each other along the second direction Y; the battery pack 1 also includes a sealing part 30, which is disposed in the third opening 1233 to seal the third opening 1233, thereby preventing leakage of cooling medium and improving the sealing reliability of the system; the sealing part 30 can be a plug, blind cover, sealing plug or other structures, and can be equipped with sealing rings, rubber rings or sealant or other materials to adapt to the structural requirements and sealing level requirements of different flow channel ports.

[0078] It is understood that by placing the sealing part 30 inside the third opening 1233, the leakage of the cooling medium to the outside of the battery pack 1 can be avoided, thus preventing safety hazards. At the same time, it can also provide a flexible flow channel closure method during the manufacturing and maintenance of the housing assembly 10, such as reserving an expansion port in some scenarios, or using it as a functional port for cooling system liquid injection, venting, testing, etc. in process inspection.

[0079] Furthermore, the distance between the longitudinal beam flow channel 1231 and the bottom plate 121 is equal to the distance between the second crossbeam flow channel 1222 and the bottom plate 121, so that the longitudinal beam flow channel 1231 and the second crossbeam flow channel 1222 are on the same plane in the height direction of the housing assembly 10. This is beneficial to keep the flow path of the cooling medium between the longitudinal beam flow channel 1231 and the second crossbeam flow channel 1222 smooth, and reduce the structural complexity caused by flow resistance and height difference.

[0080] Furthermore, the crossbeam 122 includes a crossbeam body 1224 and a first reinforcing part 1225. The first reinforcing part 1225 is disposed on the side of the crossbeam body 1224 away from the battery module 20, that is, on the outer side of the crossbeam body 1224, thereby improving the structural strength and bending stiffness of the crossbeam 122. The crossbeam body 1224 is provided with a first crossbeam flow channel 1221 and a second crossbeam flow channel 1222 inside, and the first reinforcing part 1225 is provided with a first reinforcing cavity 1225A for enhancing structural strength inside. The crossbeam 122 can be integrally formed by extruding aluminum profiles to form the crossbeam body 1224 and the first reinforcing part 1225, thereby achieving structural integration. This not only improves the rigidity of the crossbeam 122, but also facilitates the connection and welding between the crossbeam 122 and the longitudinal beam 123, reducing manufacturing and assembly costs.

[0081] Similarly, the longitudinal beam 123 includes a longitudinal beam body 1234 and a second reinforcing part 1235. The second reinforcing part 1235 is disposed on the side of the longitudinal beam body 1234 away from the battery module 20, that is, on the outer side of the longitudinal beam body 1234, thereby improving the structural strength and bending stiffness of the longitudinal beam 123. The longitudinal beam body 1234 is provided with a longitudinal beam flow channel 1231 inside, and the second reinforcing part 1235 is provided with a second reinforcing cavity 1235A for enhancing structural strength inside. The longitudinal beam 123 can be integrally formed by extruding aluminum profiles to form the longitudinal beam body 1234 and the second reinforcing part 1235, thereby achieving structural integration. While improving the rigidity of the longitudinal beam 123, it also facilitates the connection and welding between the longitudinal beam 123 and the crossbeam 122, reducing manufacturing and assembly costs.

[0082] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A housing assembly (10), characterized in that, include: The box body (12) includes a bottom plate (121), two crossbeams (122) and two longitudinal beams (123). The two crossbeams (122) are connected to both ends of the bottom plate (121) and are arranged opposite to each other. The two longitudinal beams (123) are connected to both sides of the bottom plate (121) and are arranged opposite to each other to form a receiving cavity (11). The liquid cooling component (13) includes multiple liquid cooling plates (131), which are detachably connected between the two crossbeams (122) to divide the receiving cavity (11) into multiple receiving sub-cavities (111), which are used to install the battery module (20). The crossbeam (122), the longitudinal beam (123), and the liquid cooling plate (131) are interconnected to allow the cooling medium to flow through.

2. The housing assembly (10) according to claim 1, characterized in that, The two crossbeams (122) include a first crossbeam (122A) and a second crossbeam (122B); The cooling medium flows sequentially into the first crossbeam (122A), a plurality of liquid cooling plates (131), the second crossbeam (122B), and at least one longitudinal beam (123).

3. The housing assembly (10) according to claim 2, characterized in that, The cooling medium flows sequentially into the first crossbeam (122A), the plurality of liquid cooling plates (131), the second crossbeam (122B), and at least one longitudinal beam (123), and then flows out from the first crossbeam (122A).

4. The housing assembly (10) according to claim 3, characterized in that, Each of the crossbeams (122) is provided with a first crossbeam flow channel (1221) and a second crossbeam flow channel (1222) spaced apart; each of the liquid cooling plates (131) is provided with a liquid cooling flow channel (1311); The cooling medium flows sequentially into the first crossbeam channel (1221) of the first crossbeam (122A), the liquid cooling channels (1311) of the plurality of liquid cooling plates (131), the second crossbeam channel (1222) of the second crossbeam (122B), and at least one longitudinal beam (123), and then flows out of the second crossbeam channel (1222) of the first crossbeam (122A).

5. The housing assembly (10) according to claim 4, characterized in that, The first crossbeam (122A) is provided with an inlet (14) and an outlet (15), and the inlet (14) is connected to the first crossbeam flow channel (1221) of the first crossbeam (122A), and the outlet (15) is connected to the second crossbeam flow channel (1222) of the first crossbeam (122A). The second crossbeam flow channel (1222) is located on the side of the first crossbeam flow channel (1221) near the bottom plate (121).

6. The housing assembly (10) according to claim 5, characterized in that, The first crossbeam (122A) has a plurality of first mounting holes (122A1), and the plurality of first mounting holes (122A1) are connected to the first crossbeam flow channel (1221) of the first crossbeam (122A); the second crossbeam (122B) has a plurality of second mounting holes (122B1), and the plurality of second mounting holes (122B1) are connected to the second crossbeam flow channel (1222) of the second crossbeam (122B); One end of the liquid cooling plate (131) is inserted into the first mounting hole (122A1), and the liquid cooling channel (1311) of the liquid cooling plate (131) is connected to the first crossbeam channel (1221) through the first mounting hole (122A1); the other end of the liquid cooling plate (131) is inserted into the second mounting hole (122B1), and the liquid cooling channel (1311) of the liquid cooling plate (131) is connected to the second crossbeam channel (1222) through the second mounting hole (122B1).

7. The housing assembly (10) according to claim 6, characterized in that, The liquid cooling plate (131) includes a liquid cooling main plate (1312) and two connectors (1313) disposed at both ends of the liquid cooling main plate (1312). The liquid cooling main plate (1312) is provided with the liquid cooling channel (1311), and the two connectors (1313) are respectively connected to both ends of the liquid cooling channel (1311). One of the connectors (1313) is inserted into the first mounting hole (122A1) and communicates with the first liquid cooling channel, while the other connector (1313) is inserted into the second mounting hole (122B1) and communicates with the second liquid cooling channel.

8. The housing assembly (10) according to claim 4, characterized in that, At least one of the longitudinal beams (123) is provided with a longitudinal beam flow channel (1231); The cooling medium flows sequentially into the first crossbeam (122A), a plurality of liquid cooling plates (131), the second crossbeam (122B), and the longitudinal beam channel (1231) of at least one longitudinal beam (123).

9. The housing assembly (10) according to claim 8, characterized in that, The second crossbeam flow channel (1222) extends through the crossbeam (122) along a first direction (X), the first direction (X) intersects the height direction of the housing assembly (10), and the second crossbeam flow channel (1222) includes two first openings (1223) arranged opposite to each other along the first direction (X); The longitudinal beam (123) has two second openings (1232) on the side near the crossbeam (122). The second openings (1232) are connected to the longitudinal beam channel (1231), and one of the second openings (1232) is connected to the first opening (1223) of the first crossbeam (122A), and the other second opening (1232) is connected to the first opening (1223) of the second crossbeam (122B).

10. A battery pack (1), characterized in that, Includes the housing assembly (10) as described in any one of claims 1-9.

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