Liquid cooling assembly, battery pack box and battery pack

Abstract

The application provides a liquid cooling assembly, a battery pack box and a battery pack, and relates to the technical field of energy storage equipment. The liquid cooling assembly comprises a liquid cooling plate, a first connecting frame and a second connecting frame. The first connecting frame is connected to the first side in the thickness direction of the liquid cooling plate. The second connecting frame is connected to the second side in the thickness direction of the liquid cooling plate. The end face of the side, away from the liquid cooling plate, of the first connecting frame is provided with a receiving groove. The receiving groove is used for accommodating sealing glue and is used for bonding with the battery pack box. The liquid cooling assembly, the battery pack box and the battery pack improve the dustproof and waterproof capability of the liquid cooling assembly. The hoisting structure and the limiting structure are arranged on the liquid cooling assembly. The hoisting function can be realized on the liquid cooling assembly. The structure of the liquid cooling assembly is simplified, so that the weight is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment technology, and in particular to a liquid cooling component, a battery pack housing, and a battery pack. Background Technology

[0002] With the rapid development of energy storage devices, battery packs, as core components of new energy vehicles, have attracted much attention. Modern battery packs adopt a modular design and are mainly composed of high-energy-density cells, battery management systems, thermal management systems, and electrical components. They store and provide electrical energy for electric vehicles, and the battery pack housing plays a key role in the overall design of the battery pack, providing a rigid mounting frame for the cells.

[0003] In related technologies, most products adopt a flat-plate lower housing design. When installing a flat-plate liquid cooling plate, a lifting structure needs to be added to the upper cover. Therefore, the upper cover needs to be made of sheet metal or vacuum-formed parts in conjunction with pressure strips.

[0004] However, the liquid cooling components in the aforementioned battery pack housing have poor dust and water resistance, and the installation of a hoisting structure on the top of the liquid cooling plate results in a complex housing structure and heavy weight. Utility Model Content

[0005] This application provides a liquid cooling component, a battery pack housing, and a battery pack to solve the problems of poor dust and water resistance of the liquid cooling component and the complex structure and heavy weight caused by setting a hoisting structure on the top cover of the battery pack housing.

[0006] In a first aspect, this application provides a liquid cooling assembly for a battery pack housing, comprising: a liquid cooling plate, a first connecting frame, and a second connecting frame; the first connecting frame is connected to a first side in the thickness direction of the liquid cooling plate; the second connecting frame is connected to a second side in the thickness direction of the liquid cooling plate; the side of the first connecting frame facing away from the liquid cooling plate is used to face the receiving cavity of the battery pack housing; the end face of the first connecting frame facing away from the liquid cooling plate is provided with a receiving groove, the receiving groove being used to receive sealant and to bond with the battery pack housing.

[0007] In the above-mentioned liquid cooling assembly, the first connecting frame includes a first frame, a second frame, a third frame, and a fourth frame connected end to end in sequence; the extension directions of the first frame and the third frame are parallel to each other, and the extension directions of the second frame and the fourth frame are parallel to each other; a first reinforcing frame is connected between the first frame and the third frame, and the extension direction of the first reinforcing frame is parallel to the extension direction of the second frame.

[0008] In the above-mentioned liquid cooling assembly, it is possible to have multiple receiving slots, which are spaced apart along the extension direction of the first connecting frame; or the receiving slots are strip-shaped slots, including a first receiving slot, a second receiving slot, a third receiving slot, and a fourth receiving slot.

[0009] The first receiving slot is located on the side of the first frame away from the liquid cooling plate; the second receiving slot is located on the side of the second frame away from the liquid cooling plate; the third receiving slot is located on the side of the third frame away from the liquid cooling plate; the fourth receiving slot is located on the side of the fourth frame away from the liquid cooling plate; the first receiving slot, the second receiving slot, the third receiving slot and the fourth receiving slot are connected to each other in sequence.

[0010] In the above-mentioned liquid cooling assembly, the first connecting frame is provided with multiple limiting structures, which are distributed at intervals along the extension direction of the first connecting frame; the limiting structures are used to cooperate with the limiting mating parts of the battery module; wherein the limiting structures are offset from the receiving groove.

[0011] In the aforementioned liquid cooling assembly, the limiting structure includes a limiting connection hole and a limiting connector. The limiting connection hole is opened on the side wall of the first connecting frame, and the limiting connector is connected to the first connecting frame through the limiting connection hole. The limiting connector is located on the side of the first connecting frame away from the liquid cooling plate.

[0012] In the above-mentioned liquid cooling assembly, the second connecting frame includes a fifth frame, a sixth frame, and a plurality of second reinforcing frames. The extension directions of the fifth frame and the sixth frame are consistent with the extension direction of the first frame, and the extension directions of the plurality of second reinforcing frames are consistent with the extension direction of the first reinforcing frame. The plurality of second reinforcing frames are disposed between the fifth frame and the sixth frame, and the plurality of second reinforcing frames are distributed at intervals along the extension direction of the fifth frame.

[0013] In the above-mentioned liquid cooling assembly, it is possible to connect the first connecting frame, the liquid cooling plate, and the second connecting frame through a plurality of first rivets, the plurality of first rivets being distributed at intervals along the circumferential edge of the first connecting frame and connected to the circumferential edge of the liquid cooling plate and the circumferential edge of the second connecting frame; the first reinforcing frame of the first connecting frame is connected to the liquid cooling plate through second rivets.

[0014] In the aforementioned liquid cooling assembly, it is possible to further include a hoisting structure, which includes multiple first hoisting holes and multiple second hoisting holes; the multiple first hoisting holes are spaced apart on the first frame and the third frame of the first connecting frame; the multiple second hoisting holes are spaced apart on the fifth frame and the sixth frame of the second connecting frame; the multiple first hoisting holes and the multiple second hoisting holes correspond one-to-one along the stacking direction of the first connecting frame and the second connecting frame.

[0015] Secondly, this application provides a battery pack housing, including a bottom protective plate; a side plate connected to the edge of the bottom protective plate; a cover plate connected to the side plate on the side away from the bottom protective plate; the cover plate, the side plate and the bottom protective plate form a receiving cavity for receiving a battery module; the aforementioned liquid cooling assembly is disposed on the side of the bottom protective plate near the receiving cavity and is sealed to the battery module.

[0016] Thirdly, this application provides a battery pack, including the aforementioned battery pack housing and battery module, wherein the battery module is disposed within the receiving cavity of the battery pack housing.

[0017] This application provides a liquid cooling assembly, a battery pack housing, and a battery pack. The liquid cooling assembly includes a liquid cooling plate, a first connecting frame, and a second connecting frame. By placing the liquid cooling plate between the first and second connecting frames, the structural complexity of the liquid cooling assembly is simplified, its weight is reduced, and its strength is improved. The lifting structure on the first and second connecting frames enhances the lifting stability of the liquid cooling assembly. A receiving groove is provided on the end face of the first connecting frame away from the liquid cooling plate, and sealant is filled into the receiving groove, improving the dustproof and waterproof performance of the liquid cooling assembly. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 An exploded view of the liquid cooling assembly provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the liquid cooling assembly provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the liquid cooling plate of the liquid cooling assembly provided in the embodiments of this application;

[0022] Figure 4 A schematic diagram of the structure of the first connecting frame of the liquid cooling assembly provided in the embodiments of this application;

[0023] Figure 5 A side view of the liquid cooling assembly provided in an embodiment of this application;

[0024] Figure 6 A schematic diagram of the limiting structure of the liquid cooling component provided in the embodiments of this application;

[0025] Figure 7 A schematic diagram of the structure of the second connection frame of the liquid cooling assembly provided in the embodiments of this application;

[0026] Figure 8This is a schematic diagram of the hoisting structure of the liquid cooling component provided in the embodiments of this application;

[0027] Figure 9 This is a schematic diagram of the structure of the liquid cooling assembly in the cluster frame provided in the embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Liquid cooling plate; 11. Water inlet; 12. Water outlet; 13. First riveting piece; 20. First connecting frame; 21. First frame; 22. Second frame; 23. Third frame; 24. Fourth frame; 25. First reinforcing frame; 26. Receiving groove; 27. First lifting hole; 30. Second connecting frame; 31. Fifth frame; 32. Sixth frame; 33. Second reinforcing frame; 34. Second lifting hole; 35. Second riveting piece; 40. Limiting structure; 41. Limiting connecting hole; 42. Limiting connecting piece; 43. Cluster frame connecting piece.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0032] In related technologies, the installation of the flat liquid cooling plate in a flat-plate lower enclosure design requires adding a lifting structure to the upper cover of the liquid cooling plate. The upper cover is a sheet metal or vacuum-formed part with a pressure strip. However, the above-mentioned upper cover structure of the liquid cooling plate is complex and heavy. When the liquid cooling plate is used in the battery pack enclosure, the sealing effect between the liquid cooling plate and the battery modules in the battery pack enclosure is poor, resulting in poor dust and water protection between the liquid cooling plate and the battery modules.

[0033] In view of this, this application provides a liquid cooling assembly, including a liquid cooling plate, a first connecting frame, a second connecting frame, and a lifting structure. The first connecting frame is connected to a first side in the thickness direction of the liquid cooling plate, and the second connecting frame is connected to a second side in the thickness direction of the liquid cooling plate. The side of the first connecting frame facing away from the liquid cooling plate is used to face the receiving cavity of the battery pack housing. A receiving groove is provided on the end face of the side of the first connecting frame facing away from the liquid cooling plate. The receiving groove is used to receive sealant and for bonding to the battery pack housing. By placing the liquid cooling plate between the first and second connecting frames, the structural complexity of the liquid cooling assembly is simplified, the weight is reduced, and the strength of the liquid cooling assembly is improved. The lifting structure on the first and second connecting frames improves the lifting stability of the liquid cooling assembly. The receiving groove on the end face of the first connecting frame facing away from the liquid cooling plate, filled with sealant, improves the dustproof and waterproof performance of the liquid cooling assembly.

[0034] Firstly, referring to Figure 1 and Figure 2 As shown, this application provides a liquid cooling assembly for a battery pack housing. The liquid cooling assembly includes a liquid cooling plate 10, a first connecting frame 20, and a second connecting frame 30. The first connecting frame 20 is connected to a first side in the thickness direction of the liquid cooling plate 10; the second connecting frame 30 is connected to a second side in the thickness direction of the liquid cooling plate 10.

[0035] The first connecting frame 20 is located on the side opposite to the liquid cooling plate 10, facing the receiving cavity of the battery pack housing. The end face of the first connecting frame 20 on the side opposite to the liquid cooling plate 10 is provided with a receiving groove 26, which is used to receive sealant and to bond with the battery pack housing.

[0036] For example, the liquid cooling component provided in this application embodiment is a core component of the battery pack thermal management system. It is located below the battery module and is used to precisely control the temperature of the battery module to ensure that the battery module operates in an efficient and safe state.

[0037] In embodiments of this application, the liquid cooling assembly includes a liquid cooling plate 10, a first connecting frame 20, and a second connecting frame 30. The liquid cooling plate 10 is a heat exchange component in the liquid cooling assembly. Figure 3 As shown, the liquid cooling plate 10 is used to conduct and dissipate heat from the battery module, ensuring that the battery module adapts to the external environment and operates within a suitable temperature range. Its base material can be made of aluminum alloy, and the surface is anodized to prevent water vapor corrosion. An inlet 11 and an outlet 12 are provided on one side of the liquid cooling plate 10, and a flow channel is also provided inside the liquid cooling plate 10 for the flow of coolant, thereby accurately controlling the temperature of the battery module.

[0038] The first connecting frame 20 and the second connecting frame 30 are disposed on the upper and lower sides of the liquid cooling plate 10 and are parallel to the liquid cooling plate 10, providing the necessary strength and rigidity for the liquid cooling plate 10. By setting the first connecting frame 20, the strength of the liquid cooling component is improved, significantly increasing the service life of the battery pack, thereby avoiding damage to the battery pack housing due to strength issues. A receiving groove 26 is provided on the side of the first connecting frame 20 facing away from the liquid cooling plate 10 to accommodate sealant, preventing moisture from intruding into the internal area of ​​the battery pack, improving the dustproof and waterproof performance of the battery pack housing, achieving an IP67 protection rating. IP67 is a dustproof and waterproof rating defined by the International Electrotechnical Commission (IEC). The first digit indicates the solid state protection rating, specifically dustproof, preventing dust from entering the equipment's interior, while the second digit indicates the liquid state protection rating, specifically waterproof.

[0039] During the installation process of the liquid cooling assembly provided in this application embodiment, the first connecting frame 20 is placed with the receiving groove 26 facing upwards, and sealant is filled into the receiving groove 26. After the sealant is applied, the liquid cooling plate 10 is placed with the silkscreened side facing downwards. The liquid cooling plate 10 is placed in the position corresponding to the first connecting frame 20 using a positioning fixture. The first connecting frame 20 and the liquid cooling plate 10 are fixed by riveting. Then, the first connecting frame 20, the liquid cooling plate 10, and the second connecting frame 30 are clamped and fixed by a fixture and connected and fixed together by riveting.

[0040] As one feasible implementation method, refer to Figure 4 As shown, the first connecting frame 20 includes a first frame 21, a second frame 22, a third frame 23, and a fourth frame 24 connected end to end in sequence; the extension directions of the first frame 21 and the third frame 23 are parallel to each other, and the extension directions of the second frame 22 and the fourth frame 24 are parallel to each other; a first reinforcing frame 25 is connected between the first frame 21 and the third frame 23, and the extension direction of the first reinforcing frame 25 is parallel to the extension direction of the second frame 22.

[0041] For example, the first frame 21, the second frame 22, the third frame 23, and the fourth frame 24, as part of the load-bearing frame of the liquid cooling assembly, are connected end to end by aluminum alloy profiles and / or high-strength galvanized sheets through profile welding. Epoxy structural adhesive can also be applied to the weld seams to prevent cracks from forming at the weld seams during vibration. The galvanized sheets need to undergo electrophoresis treatment, which is a surface treatment technology that uses an electric field to cause charged particles to migrate and deposit in a liquid medium in a directional manner. This can significantly improve the salt spray resistance of the battery pack housing, thereby improving the durability of the battery pack.

[0042] The first frame 21, the second frame 22, the third frame 23, and the fourth frame 24 are all made by extrusion of profiles and are connected to each other, taking into account both lightweight and bending resistance, thereby improving the strength of the first connecting frame 20 and also helping to reduce the weight of the battery pack box.

[0043] The first reinforcing frame 25, as a key load-bearing reinforcement structure, connects the first frame 21 and the third frame 23. It can be made of aluminum alloy or high-strength steel, with thick profile walls and internal reinforcing ribs. This forms a modular partitioned structure for the first connecting frame 20, providing local structural rigidity and stability for the battery module and effectively dispersing and bearing loads from different directions.

[0044] In one possible implementation, there are multiple receiving slots 26, which are spaced apart along the extension direction of the first connecting frame 20; in another possible implementation, the receiving slots 26 are strip-shaped slots, including a first receiving slot, a second receiving slot, a third receiving slot and a fourth receiving slot.

[0045] The first receiving slot is located on the side of the first frame 21 away from the liquid cooling plate 10; the second receiving slot is located on the side of the second frame 22 away from the liquid cooling plate 10; the third receiving slot is located on the side of the third frame 23 away from the liquid cooling plate 10; and the fourth receiving slot is located on the side of the fourth frame 24 away from the liquid cooling plate 10. The first receiving slot, the second receiving slot, the third receiving slot, and the fourth receiving slot are connected to each other in sequence.

[0046] For example, a receiving groove 26 is provided on the end face of the first connecting frame 20 away from the liquid cooling plate 10. The sealing glue is filled in the receiving groove 26 so that the entire battery pack box can achieve the protection level of IP67. It can also reduce the impact of liquid cooling welding deformation on the overall sealing performance. The sealing glue here is a structural sealing glue or foam.

[0047] The receiving groove 26 can be configured as multiple grooves, spaced apart and evenly distributed around the first connecting frame 20, which can make the stress evenly distributed. The grooves can be square grooves or dovetail grooves. The receiving groove 26 can also be a strip groove, which is set on the first frame 21, the second frame 22, the third frame 23 and the fourth frame 24 and connected end to end in sequence to form a continuous sealing groove. After the sealant cures, it forms a composite structure with the first connecting frame 20. The elastic colloid can perform thermal compensation in the groove, avoid stress concentration, improve the sealing of the battery pack box, prevent the formation of condensation on the surface of the battery module, and thus effectively protect the electrical safety of the battery module and extend the service life of the battery module.

[0048] As one feasible implementation method, refer to Figure 5 and Figure 6As shown, the first connecting frame 20 is provided with a plurality of limiting structures 40, which are distributed at intervals along the extension direction of the first connecting frame 20; the limiting structures 40 are used to cooperate with the limiting mating parts of the battery module; wherein, the limiting structures 40 are offset from the receiving groove 26.

[0049] As one feasible implementation, the limiting structure 40 includes a limiting connection hole 41 and a limiting connector 42. The limiting connection hole 41 is opened on the side wall of the first connecting frame 20, and the limiting connector 42 is connected to the first connecting frame 20 through the limiting connection hole 41. The limiting connector 42 is located on the side of the first connecting frame 20 away from the liquid cooling plate 10.

[0050] For example, a limiting structure 40 is provided on the liquid cooling assembly, which cooperates with a limiting fitting on the battery module to constrain the displacement of the battery module. The limiting structure 40 includes a limiting connection hole 41 and a limiting connector 42, which is connected to the first connecting frame 20 by riveting. The limiting connector 42 is a square thin plate, specifically a limiting sheet metal part, located on the side of the first connecting frame 20 opposite to the liquid cooling plate 10, and there are six of them. It can be a stainless steel structural part. The limiting connection hole 41 cooperates with the limiting connector 42 to achieve precise assembly of the battery module. By integrating the limiting structure 40 on the liquid cooling assembly, the weight of the battery pack housing is reduced, further reducing the assembly steps of the battery pack housing.

[0051] As one feasible implementation method, refer to Figure 7 The second connecting frame 30 shown includes a fifth frame 31, a sixth frame 32, and a plurality of second reinforcing frames 33. The extension directions of the fifth frame 31 and the sixth frame 32 are consistent with the extension direction of the first frame 21, and the extension directions of the plurality of second reinforcing frames 33 are consistent with the extension direction of the first reinforcing frame 25. The plurality of second reinforcing frames 33 are disposed between the fifth frame 31 and the sixth frame 32, and the plurality of second reinforcing frames 33 are distributed at intervals along the extension direction of the fifth frame 31.

[0052] For example, the fifth frame 31 and the sixth frame 32 use the same profile structure as the first frame 21, both made of aluminum alloy and galvanized sheet; the second reinforcing frame 33 is distributed at intervals and is a stamped part formed by stamping process, made of aluminum alloy or stainless steel. This method makes there no seam or connection point between the fifth frame 31, the sixth frame 32 and the second reinforcing frame 33. The integrated design helps to simplify the manufacturing process and reduce errors in the assembly process, providing a high-strength and lightweight load-bearing bottom frame for the liquid cooling component. The second reinforcing frame 33 is provided with multiple reinforcing protrusions. The height of the protrusions can be set to 1-5 mm. It is understood that the height of the protrusions cannot be higher than the height of the fifth frame 31 and the sixth frame 32, further improving the load-bearing strength of the second reinforcing frame 33 and effectively reducing the local stress. When the protrusions are high, it is not convenient to install the liquid cooling plate 10.

[0053] In one feasible implementation, the first connecting frame 20, the liquid cooling plate 10, and the second connecting frame 30 are connected by a plurality of first rivets 13. The plurality of first rivets 13 are distributed at intervals along the circumferential edge of the first connecting frame 20 and are connected to the circumferential edge of the liquid cooling plate 10 and the circumferential edge of the second connecting frame 30. The first reinforcing frame 25 of the first connecting frame 20 is connected to the liquid cooling plate 10 by a second rivet 35.

[0054] For example, the first reinforcing frame 25 and the liquid cooling plate 10 are fixed at the middle position by a second riveting member 35. The second riveting member 35 can be a riveting member with a flanged structure. Through die extrusion, a mechanical interlock is formed between the profiles, improving the connection strength. The first reinforcing frame 25, the liquid cooling plate 10, and the second connecting frame 30 are first fixed by tooling positioning and clamping, and then connected and fixed by the first riveting member 13. The first riveting member 13 and the second riveting member 35 can be made of stainless steel A2-70 with a tensile strength greater than 700MPa, or anodized aluminum alloy with a hardness greater than 80HB, to improve the tensile strength of the liquid cooling assembly and achieve structural integration of the liquid cooling plate 10 with the first connecting frame 20 and the second connecting frame 30. In addition, the first riveting member 13 and the second riveting member 35 also need to be equipped with corresponding insulating washers to block the path of electrochemical corrosion.

[0055] As one feasible implementation method, refer to Figure 8 As shown, the liquid cooling assembly also includes a hoisting structure, which includes a plurality of first hoisting holes 27 and a plurality of second hoisting holes 34; the plurality of first hoisting holes 27 are spaced apart on the first frame 21 and the third frame 23 of the first connecting frame 20; the plurality of second hoisting holes 34 are spaced apart on the fifth frame 31 and the sixth frame 32 of the second connecting frame 30; along the stacking direction of the first connecting frame 20 and the second connecting frame 30, the plurality of first hoisting holes 27 and the plurality of second hoisting holes 34 correspond one-to-one.

[0056] For example, since the battery pack housing needs to be designed with a lifting structure for connecting the housing to the vehicle chassis, so as to facilitate safe lifting and disassembly by professionals and reduce maintenance difficulty, the lifting structure designed on the liquid cooling component in this application embodiment can simplify other structures of the battery pack housing, help reduce the weight of the housing, reduce assembly steps, and the high housing structure can eliminate the original internal sealant strip of the battery pack, more effectively preventing the structural adhesive at the bottom of the battery module from invading the mating area of ​​the battery pack housing cover, and preventing the cover from being unable to be removed due to adhesive overflow.

[0057] The first lifting hole 27 is designed on the first frame 21 and the third frame 23 of the first connecting frame 20, and is evenly spaced along the length of the first frame 21 and the third frame 23. It is an irregularly shaped lifting hole, specifically a keyhole design. The second lifting hole 34 is designed on the fifth frame 31 and the sixth frame 32 of the second connecting frame 30, and is also evenly spaced along the length of the first frame 21 and the third frame 23. It is a square hole. One first lifting hole 27 and one second lifting hole 34 together form a lifting structure, and the axes of the first lifting hole 27 and the second lifting hole 34 are aligned. The first lifting hole 27 and the second lifting hole 34 work together to bear load and are used in conjunction with the lifting component. The lifting component can simultaneously lift the first connecting frame 20 and the second connecting frame 30, effectively reducing stress at a single point and improving lifting stability. Insulating gaskets are embedded in the lifting holes to effectively reduce the impact of vibration. The liquid cooling assembly adopts a six-point hoisting system, with three hoisting structures symmetrically distributed on each side to achieve multi-dimensional mechanical optimization, forming a statically determinate support system and avoiding stress concentration.

[0058] In summary, the liquid cooling assembly provided in this application includes a liquid cooling plate 10, a first connecting frame 20, a second connecting frame 30, and a lifting structure. By providing a receiving groove 26 on the first connecting frame 20 to accommodate sealant, an IP67 protection rating can be achieved. By integrating the lifting structure and the limiting structure 40 in the cluster frame onto the liquid cooling assembly, other components of the battery pack housing are simplified, thereby reducing the weight of the battery pack housing. During installation, refer to... Figure 9 As shown, the liquid cooling component is mounted on the guide rail of the battery pack cluster frame, and the liquid cooling component is connected to the cluster frame guide rail through the cluster frame connector 43.

[0059] Secondly, this application provides a battery pack housing, which includes: a bottom protective plate, side plates, a cover plate, and the aforementioned liquid cooling assembly. The side plates are connected to the edge of the bottom protective plate; the cover plate is connected to the side of the side plates away from the bottom protective plate; the cover plate, side plates, and bottom protective plate form a receiving cavity for accommodating a battery module; the liquid cooling assembly is disposed on the side of the bottom protective plate near the receiving cavity and is sealed to the battery module.

[0060] For example, the bottom guard plate is located at the bottom of the battery pack housing and serves as the load-bearing structure of the battery pack housing. Therefore, it needs to meet the characteristics of impact resistance and compression resistance to disperse the impact force of the battery pack on the bottom guard plate. It can be made of high-strength aluminum alloy or composite material. The side plate is a barrier structure that is vertically connected to the bottom guard plate. It can be connected to the bottom guard plate by laser welding, and the side plate adopts a honeycomb aluminum structure to effectively prevent side collisions. The cover plate is a sealing plate located above the side plate. It is usually a lightweight thin plate and can be connected to the side plate by sealing rings and bolts. The liquid cooling component adopts the technical solution of the above-mentioned liquid cooling component embodiment. Therefore, it has at least the beneficial effects brought by the technical solution of the above-mentioned liquid cooling component embodiment. It will not be described in detail here.

[0061] The bottom protective plate, side plates, and cover plate together form a closed battery pack housing with an internal cavity for housing the liquid cooling components and battery modules. The battery pack housing is impact-resistant and airtight, providing mechanical protection for the battery modules and liquid cooling plate 10, preventing the battery cell modules from being squeezed, and also protecting the battery modules and liquid cooling components located in the cavity from the impact of moisture and dust.

[0062] Thirdly, this application provides a battery pack, including the aforementioned battery pack housing and battery module, wherein the battery module is disposed within the receiving cavity of the battery pack housing.

[0063] For example, the battery module is the core energy storage unit of the battery pack, which is composed of multiple cells. The cell, as the smallest energy storage unit of the battery module, can be a lithium-ion battery or a lithium iron phosphate battery, etc. The multiple cells are arranged in an array above the liquid cooling component to improve the space utilization of the accommodating cavity and integrate the battery management system. As for the battery pack housing in the battery pack, the battery pack housing of this application adopts the technical solution of the above-described battery pack housing embodiment, and therefore has at least the beneficial effects brought by the technical solution of the above-described battery pack housing embodiment, which will not be elaborated here.

[0064] The battery pack housing and battery modules together form a battery pack. The battery pack provided in this application embodiment is used in various electrical devices that use batteries, including but not limited to energy storage and power output of electric vehicles, suppression of thermal runaway, and also has thermal management function, which can accurately control temperature to adapt to extreme environments.

[0065] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0067] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A liquid cooling assembly for a battery pack housing, characterized in that, The liquid cooling assembly includes: Liquid cooling plate (10); The first connecting frame (20) is connected to the first side of the liquid cooling plate (10) in the thickness direction; The second connecting frame (30) is connected to the second side of the liquid cooling plate (10) in the thickness direction; The first connecting frame (20) is located on the side away from the liquid cooling plate (10) and is used to face the receiving cavity of the battery pack housing; the end face of the first connecting frame (20) on the side away from the liquid cooling plate (10) is provided with a receiving groove (26), which is used to receive sealant and to bond with the battery pack housing.

2. The liquid cooling assembly according to claim 1, characterized in that, The first connecting frame (20) includes a first frame (21), a second frame (22), a third frame (23) and a fourth frame (24) connected end to end in sequence. The extension directions of the first frame (21) and the third frame (23) are parallel to each other, and the extension directions of the second frame (22) and the fourth frame (24) are parallel to each other; A first reinforcing frame (25) is connected between the first frame (21) and the third frame (23), and the extension direction of the first reinforcing frame (25) is parallel to the extension direction of the second frame (22).

3. The liquid cooling assembly according to claim 2, characterized in that, There are multiple receiving slots (26), and the multiple receiving slots (26) are distributed at intervals along the extension direction of the first connecting frame (20); Alternatively, the receiving groove (26) is a strip groove, and the receiving groove (26) includes a first receiving groove, a second receiving groove, a third receiving groove and a fourth receiving groove; The first receiving groove is located on the side of the first frame (21) away from the liquid cooling plate (10); The second receiving groove is disposed on the side of the second frame (22) away from the liquid cooling plate (10); The third receiving groove is located on the side of the third frame (23) away from the liquid cooling plate (10); The fourth receiving groove is located on the side of the fourth frame (24) away from the liquid cooling plate (10); The first receiving slot, the second receiving slot, the third receiving slot, and the fourth receiving slot are connected to each other in sequence.

4. The liquid cooling assembly according to claim 1, characterized in that, The first connecting frame (20) is provided with a plurality of limiting structures (40), and the plurality of limiting structures (40) are distributed at intervals along the extension direction of the first connecting frame (20); The limiting structure (40) is used to connect with the limiting fitting of the battery module; The limiting structure (40) is offset from the receiving groove (26).

5. The liquid cooling assembly according to claim 4, characterized in that, The limiting structure (40) includes a limiting connection hole (41) and a limiting connector (42). The limiting connection hole (41) is opened on the side wall of the first connecting frame (20), and the limiting connector (42) is connected to the first connecting frame (20) through the limiting connection hole (41). The limiting connector (42) is located on the side of the first connecting frame (20) away from the liquid cooling plate (10).

6. The liquid cooling assembly according to claim 2, characterized in that, The second connecting frame (30) includes a fifth frame (31), a sixth frame (32) and a plurality of second reinforcing frames (33). The extension directions of the fifth frame (31) and the sixth frame (32) are consistent with the extension direction of the first frame (21), and the extension directions of the plurality of second reinforcing frames (33) are consistent with the extension direction of the first reinforcing frame (25). A plurality of second reinforcing frames (33) are disposed between the fifth frame (31) and the sixth frame (32), and the plurality of second reinforcing frames (33) are spaced apart along the extension direction of the fifth frame (31).

7. The liquid cooling assembly according to claim 2, characterized in that, The first connecting frame (20), the liquid cooling plate (10) and the second connecting frame (30) are connected by a plurality of first rivets (13). The plurality of first rivets (13) are distributed at intervals along the circumferential edge of the first connecting frame (20) and are connected to the circumferential edge of the liquid cooling plate (10) and the circumferential edge of the second connecting frame (30). The first reinforcing frame (25) of the first connecting frame (20) is connected to the liquid cooling plate (10) by the second riveting member (35).

8. The liquid cooling assembly according to claim 6, characterized in that, It also includes a hoisting structure, which includes a plurality of first hoisting holes (27) and a plurality of second hoisting holes (34); Multiple first hoisting holes (27) are spaced apart on the first frame (21) and the third frame (23) of the first connecting frame (20); Multiple second lifting holes (34) are spaced apart on the fifth frame (31) and the sixth frame (32) of the second connecting frame (30); Along the stacking direction of the first connecting frame (20) and the second connecting frame (30), a plurality of first lifting holes (27) and a plurality of second lifting holes (34) correspond one-to-one.

9. A battery pack housing, characterized in that, include: Bottom guard plate; Side panels, the side panels are connected to the edge of the bottom protective plate; A cover plate is connected to the side plate on the side opposite to the bottom protective plate; the cover plate, the side plate, and the bottom protective plate form a receiving cavity for accommodating a battery module; The liquid cooling assembly according to any one of claims 1-8 is disposed on the side of the bottom protective plate near the accommodating cavity and is sealed to the battery module.

10. A battery pack, characterized in that, include: The battery pack housing as described in claim 9; A battery module, wherein the battery module is disposed within the accommodating cavity of the battery pack housing.

Images