Battery and energy storage system

Abstract

The embodiment of the invention provides a battery and an energy storage system, and belongs to the technical field of batteries. The battery comprises at least one battery monomer group and a box body, wherein the box body is used for accommodating the at least one battery monomer group; the box body comprises a frame which comprises side frames and at least one cross beam connected between the side frames; the liquid cooling plate is fixedly connected with the frame and the cross beam, the liquid cooling plate is used for bearing the battery monomer group and comprises a first daughter board and a second daughter board which are fixedly connected, and the second daughter board is located between the first daughter board and the cross beam; and the connecting piece is connected with the cross beam and is connected with at least one of the first daughter board and the second daughter board. By using the structure, the connection strength between the liquid cooling plate and the frame is remarkably improved, the deformation of the liquid cooling plate in long-term use is reduced, the heat dissipation efficiency and the temperature equalization capability of the liquid cooling plate are improved, the structural stability of the box body is enhanced, and the reliability of the battery monomer group is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery and an energy storage system. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage technologies, the requirements for battery safety and performance are increasing. As a key component of the battery thermal management system, the stability of the liquid cooling plate's fixed connection directly affects the battery's heat dissipation and overall performance. Traditional liquid cooling plate fixing methods often suffer from insufficient connection strength, leading to severe deformation of the liquid cooling plate over long-term use. This reduces the liquid cooling plate's heat dissipation efficiency and temperature uniformity. Furthermore, the deformation of the liquid cooling plate may increase the mechanical stress on the battery cells and the fixing structure, accelerating the aging of the fixing structure and negatively impacting the reliability and lifespan of the battery cells. Summary of the Invention

[0003] This application provides a battery and energy storage system to improve the connection strength between the liquid cooling plate and the frame, reduce the deformation of the liquid cooling plate under long-term use, improve the heat dissipation efficiency and temperature uniformity of the liquid cooling plate, enhance the structural stability of the housing, improve the reliability of the battery cell pack, and extend the battery's service life.

[0004] In a first aspect, embodiments of this application provide a battery, comprising:

[0005] At least one battery cell pack, and

[0006] A housing for accommodating at least one of the battery cell groups;

[0007] The enclosure includes:

[0008] The frame includes a frame and at least one crossbeam connecting the frame sides;

[0009] A liquid cooling plate is fixedly connected to the frame and the crossbeam. The liquid cooling plate is used to support the battery cell assembly and includes a first sub-plate and a second sub-plate fixedly connected to each other. The second sub-plate is located between the first sub-plate and the crossbeam.

[0010] The connector is connected to the crossbeam and to at least one of the first sub-plate and the second sub-plate.

[0011] In the above technical solution, by setting the liquid cooling plate to be connected to the frame and at least partially fixed to the crossbeam through connectors, the connection strength between the liquid cooling plate and the frame is significantly improved, the weight of the battery cell pack and the mechanical stress generated during charging and discharging are effectively distributed, and the crossbeam can effectively support the large surface of the liquid cooling plate, which helps to reduce the deformation of the liquid cooling plate under long-term use, thereby improving the heat dissipation efficiency and temperature uniformity of the liquid cooling plate, and enhancing the structural stability of the entire box, thereby improving the reliability of the battery cell pack and extending the service life of the battery.

[0012] In some embodiments, the connector extends through the crossbeam and through at least one of the first sub-plate and the second sub-plate.

[0013] In some embodiments, the liquid cooling plate has a recessed platform protruding toward the crossbeam, the connector passes through the crossbeam and the recessed platform, and at least a portion of the connector is installed within the recessed platform.

[0014] In some embodiments, the crossbeam has a receiving groove on the side facing the liquid cooling plate, and the second sub-plate has a protrusion that protrudes toward the crossbeam and forms a flow channel with the first sub-plate, at least a portion of the protrusion being installed in the receiving groove.

[0015] In some embodiments, the crossbeam includes a connecting platform formed between the receiving grooves, the connecting platform being connected to the liquid cooling plate via the connector.

[0016] In some embodiments, the connector extends through the crossbeam and the second sub-plate, and the first sub-plate has a first clearance opening for mounting the connector.

[0017] In some embodiments, the connector includes a first rivet nut, the head of which abuts against the side of the second sub-plate opposite to the crossbeam, and the tail of which passes through the crossbeam and the second sub-plate.

[0018] In some embodiments, a first structural adhesive is provided between the crossbeam and the second sub-plate, and the first structural adhesive is distributed in the peripheral area of ​​the connector.

[0019] In some embodiments, the connector extends through the crossbeam and the first sub-plate, and the second sub-plate is provided with a second clearance opening for mounting the connector.

[0020] In some embodiments, the connector includes a second rivet nut, the head of which abuts against the side of the crossbeam opposite to the second sub-plate, and the tail of which passes through the crossbeam, the first sub-plate, and the second sub-plate.

[0021] In some embodiments, the battery further includes:

[0022] A separator is installed between the battery cell assembly and the liquid cooling plate, and the tail of the second rivet nut is spaced apart from the separator.

[0023] In some embodiments, a second structural adhesive is provided between the crossbeam and the first sub-plate, and the second structural adhesive is distributed in the peripheral area of ​​the connector.

[0024] In some embodiments, the connector passes through the crossbeam and is connected to the first sub-plate, and the second sub-plate is provided with a third clearance for installing the connector.

[0025] In some embodiments, the connector includes a press-fit rivet, the head of which abuts against the side of the crossbeam opposite to the second sub-plate, the tail of which penetrates the crossbeam and the second sub-plate, the first sub-plate having a groove recessed toward the battery cell assembly, at least a portion of the tail of the press-fit rivet being mounted in the groove.

[0026] In some embodiments, the battery further includes:

[0027] An insulating cover is provided over the rivet and is fixedly connected to the first sub-plate.

[0028] In some embodiments, a third structural adhesive is provided between the crossbeam and the first sub-plate, and the third structural adhesive is distributed in the peripheral area of ​​the connector.

[0029] Secondly, embodiments of this application provide an energy storage system, including:

[0030] Such as any of the batteries mentioned above.

[0031] In the above technical solution, the connection strength between the liquid cooling plate and the frame is significantly improved by the battery configuration, effectively dispersing the weight of the battery cells and the mechanical stress generated during charging and discharging. At the same time, the crossbeam can effectively support the large surface of the liquid cooling plate, which helps to reduce the deformation of the liquid cooling plate under long-term use, thereby improving the heat dissipation efficiency and temperature uniformity of the liquid cooling plate, and enhancing the structural stability of the entire housing, thereby improving the reliability of the battery cells and extending the battery's service life. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This application provides schematic diagrams of the battery structure for some embodiments.

[0034] Figure 2 Top view of the housing provided in some embodiments of this application;

[0035] Figure 3 This is one of the partial cross-sectional views of the housing provided in some embodiments of this application;

[0036] Figure 4 This is a second partial sectional view of the housing provided in some embodiments of this application;

[0037] Figure 5 This is the third partial sectional view of the housing provided in some embodiments of this application;

[0038] Figure 6 Fourth partial cross-sectional view of the housing provided for some embodiments of this application.

[0039] Figure label:

[0040] Battery 1;

[0041] Battery cell pack 10, battery cell 11, end plate 12, fixing strap 13;

[0042] Box 20, frame 21, side frame 211, crossbeam 212, receiving slot 2121, connecting platform 2122;

[0043] Liquid cooling plate 22, first sub-plate 221, first clearance opening 2211, second sub-plate 222, second clearance opening 2221, third clearance opening 2222, protrusion 2223, recessed platform 223;

[0044] Connector 23, first rivet nut 231, head 2311 of first rivet nut, tail 2312 of first rivet nut, second rivet nut 232, head 2321 of second rivet nut, tail 2322 of second rivet nut, press rivet 233, head 2331 of press rivet, tail 2332 of press rivet;

[0045] Partition 24, insulating cover 25, first structural adhesive 26, second structural adhesive 27, third structural adhesive 28. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0048] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0052] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these types either.

[0053] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells or multiple battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0054] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0055] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0056] In the rapidly developing fields of electric vehicles, energy storage power stations, and portable electronic devices, batteries, as the core energy storage and supply unit, directly affect the operation of the entire system through their performance and efficiency.

[0057] The inventors discovered that thermal management has become a crucial aspect in current battery technology, especially in high-energy-density and high-power-output energy storage battery systems. As a core component of the thermal management system, the liquid cooling plate effectively absorbs and dissipates the heat generated by individual battery cells during charging and discharging through circulating coolant, thereby maintaining the battery within a suitable temperature range.

[0058] However, traditional liquid cooling plate fixing methods (such as welding and bonding) often have several shortcomings. On the one hand, because battery cells vibrate and deform during charge and discharge cycles, traditional fixing methods may not provide sufficient strength and rigidity to resist these external forces, causing the liquid cooling plate to undergo small but continuous deformation. Over long-term use, this not only affects the heat transfer efficiency between the liquid cooling plate and the battery cells, but also causes localized overheating within the battery due to decreased surface flatness, and may even lead to thermal runaway. On the other hand, the deformation of the liquid cooling plate may also increase the mechanical stress on the battery cells and the fixing structure, accelerating the aging of the fixing structure and negatively impacting the reliability and lifespan of the battery cells.

[0059] Based on the above considerations, in order to solve the problem of insufficient connection strength of the liquid cooling plate, which affects the heat dissipation performance of the liquid cooling plate and the reliability of the battery cell pack, the inventors, after in-depth research, designed a battery, including: a housing and at least one battery cell pack. The housing is used to house at least one battery cell pack. The housing includes: a frame, a liquid cooling plate, and a connector. The frame includes a side frame and at least one crossbeam connected between the side frames. The liquid cooling plate is fixedly connected to the side frame and to the crossbeam. The liquid cooling plate is used to support the battery cell pack, and the liquid cooling plate includes a first sub-plate and a second sub-plate fixedly connected, with the second sub-plate located between the first sub-plate and the crossbeam. The connector is connected to the crossbeam and to at least one of the first and second sub-plates.

[0060] In this battery structure, by setting the liquid cooling plate to be connected to the frame and at least partially fixed to the crossbeam via connectors, the connection strength between the liquid cooling plate and the frame is significantly improved. This effectively disperses the weight of the battery cells and the mechanical stress generated during charging and discharging. At the same time, the crossbeam can provide effective support for the large surface of the liquid cooling plate, which helps to reduce the deformation of the liquid cooling plate under long-term use, thereby improving the heat dissipation efficiency and temperature uniformity of the liquid cooling plate, and enhancing the structural stability of the entire housing. This improves the reliability of the battery cells and extends the battery's lifespan.

[0061] The battery disclosed in this application can be used in an energy storage system, which includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple batteries, which are connected in series via a busbar to increase the voltage of the energy storage system. When the energy storage system includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage system.

[0062] Energy storage systems can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage systems can store electrical energy as needed and output it when appropriate. For example, an energy storage system can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0063] In some embodiments, the energy storage system is an energy storage container or an energy storage cabinet.

[0064] To meet different power needs, battery 1 may include multiple battery cells 11, wherein the multiple battery cells 11 may be connected in series, in parallel or in a mixed manner, and a mixed manner refers to a combination of series and parallel connections.

[0065] Reference Figure 1 The battery 1 includes a housing 20 and a plurality of battery cell packs 10, each battery cell pack 10 including a plurality of battery cells 11. The housing 20 includes a frame 21 and a top cover (not shown). The frame 21 and the top cover can be closed and fixed to form a receiving space, in which the plurality of battery cell packs 10 can be accommodated. In some embodiments, the frame 21 can be a plate-like structure, and the top cover can be a hollow structure with one end open, with the frame 21 closing onto the open side of the top cover.

[0066] In battery 1, multiple battery cells 11 can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 11 are connected in both series and parallel configurations. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed manner; alternatively, battery 1 can be composed of multiple battery cells 11 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole. Battery 1 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells 11.

[0067] According to some embodiments of this application, such as Figure 1 As shown, this application provides a battery 1, which includes: a housing 20 and at least one battery cell group 10, wherein the housing 20 is used to accommodate at least one battery cell group 10.

[0068] like Figures 2-6As shown, the housing 20 includes a frame 21, a liquid cooling plate 22, and a connector 23. The frame 21 includes a side frame 211 and at least one crossbeam 212 connected between the side frames 211. The liquid cooling plate 22 is fixedly connected to the side frame 211 and to the crossbeam 212. The liquid cooling plate 22 is used to support the battery cell pack 10. The liquid cooling plate 22 includes a first sub-plate 221 and a second sub-plate 222 fixedly connected. The second sub-plate 222 is located between the first sub-plate 221 and the crossbeam 212. The connector 23 is connected to the crossbeam 212 and to at least one of the first sub-plate 221 and the second sub-plate 222.

[0069] For example, in some embodiments, such as Figure 1 As shown, battery 1 includes four battery cell groups 10.

[0070] In this embodiment, such as Figure 1 As shown, the battery cell pack 10 includes: a fixing strap 13, two end plates 12, and multiple battery cells 11, where multiple means two or more. The multiple battery cells 11 are stacked along the width direction of the crossbeam 212; the two end plates 12 are spaced apart at both ends of the multiple battery cells 11 along the width direction of the crossbeam 212; the fixing strap 13 surrounds the multiple battery cells 11 and the two end plates 12 to fix the multiple battery cells 11 and the two end plates 12 into one unit.

[0071] The fixing strap 13 can be provided as one or more, where "multiple" means two or more. For example, in some embodiments, such as... Figure 1 As shown, two fixing straps 13 can be installed.

[0072] The crossbeam 212 can be provided as one or more, where "multiple" means two or more. For example, in some embodiments, such as... Figure 2 As shown, the frame 21 includes a side frame 211 and four crossbeams 212 connected between the side frames 211.

[0073] The crossbeam 212 can be designed in the shape of a plate or a tube, etc., and there are no restrictions here.

[0074] For example, in some embodiments, such as Figure 2 As shown, the crossbeam 212 is generally designed as a long strip, and the surface of the crossbeam 212 is uneven.

[0075] A flow channel for coolant can be formed between the first sub-plate 221 and the second sub-plate 222. The first sub-plate 221 and the second sub-plate 222 can be fixedly connected by brazing or bonding to form a liquid cooling plate 22.

[0076] For example, in some embodiments, the first sub-board 221 and the second sub-board 222 are fixedly connected by brazing to form the liquid cooling plate 22.

[0077] The edge of the liquid cooling plate 22 can be connected to the frame 211 by means of threaded connection, welding, or bonding. The frame 211 can be fixedly connected to the crossbeam 212 by means of threaded connection, welding, or riveting. The frame 211 can have multiple sides, meaning two or more sides. The crossbeam 212 can be connected between two adjacent sides or between two opposite sides. For example, as... Figure 2 As shown, the crossbeam 212 may include four sides connected end to end, and the crossbeam 212 may be connected between two opposite sides.

[0078] In some embodiments, the connector 23 may be fastened to the crossbeam 212 and the first sub-plate 221; in other embodiments, the connector 23 may be fastened to the crossbeam 212 and the second sub-plate 222; in still other embodiments, the connector 23 may be fastened to the crossbeam 212, the first sub-plate 221 and the second sub-plate 222.

[0079] The connector 23 may include, but is not limited to, threaded connector 23, rivet nut, rivet, snap fastener, plug-in connector, or a combination of two or more of the above.

[0080] For example, in some embodiments, such as Figures 4-5 As shown, connector 23 is a rivet nut.

[0081] For example, in other embodiments, such as Figure 6 As shown, connector 23 is a press-fit rivet 233.

[0082] A single crossbeam 212 can be fixed to the liquid cooling plate 22 by multiple connectors 23. The multiple connectors 23 can be arranged in different positions on the liquid cooling plate 22 according to the actual situation to adapt to different layout and fixing requirements.

[0083] Multiple means two or more. For example, in some embodiments, a single beam 212 can be fixed to the liquid cooling plate 22 by nine connectors 23.

[0084] It is understandable that, such as Figures 1-2 and Figures 4-6As shown, based on the fixed connection between the liquid cooling plate 22 and the crossbeam 212, multiple crossbeams 212 are spaced apart along the width direction and are respectively supported at multiple positions on the bottom surface of the liquid cooling plate 22. That is, multiple crossbeams 212 are supported at multiple positions on the surface of the liquid cooling plate 22 away from the battery cell group 10. Furthermore, the crossbeams 212 and the liquid cooling plate 22 are further tightly connected through the connector 23, so that the crossbeams 212 can help the liquid cooling plate 22 to bear more of the weight of the multiple battery cell groups 10 and the expansion force. Since the connector 23 is connected to the crossbeam 212 and to at least one of the first sub-plate 221 and the second sub-plate 222, a suitable connection scheme can be selected according to actual needs and space conditions, increasing the diversity and flexibility of the assembly and fixing method of the liquid cooling plate 22. Furthermore, since the liquid cooling plate 22 is fixedly connected to the frame 211, the edge of the liquid cooling plate 22 can be fixed to multiple sides of the frame 211, maintaining the basic stability of the liquid cooling plate 22 and reducing the shaking and displacement of the liquid cooling plate 22 when the housing 20 is subjected to vibration and impact.

[0085] The battery 1 provided in this application embodiment, by setting the liquid cooling plate 22 to be connected to the frame 211 and at least partially fixed to the crossbeam 212 through the connector 23, significantly improves the connection strength between the liquid cooling plate 22 and the frame 21, effectively disperses the weight of the battery cell pack 10 and the mechanical stress generated during charging and discharging. At the same time, the crossbeam 212 can effectively support the large surface of the liquid cooling plate 22, which helps to reduce the deformation of the liquid cooling plate 22 under long-term use, thereby improving the heat dissipation efficiency and temperature uniformity of the liquid cooling plate 22, and enhancing the structural stability of the entire housing 20, thereby improving the reliability of the battery cell pack 10 and extending the service life of the battery 1.

[0086] According to some embodiments of this application, such as Figures 4-6 As shown, connector 23 passes through crossbeam 212, and connector 23 passes through at least one of first sub-plate 221 and second sub-plate 222.

[0087] In some implementations, such as Figure 5 As shown, the connector 23 passes through the crossbeam 212, the second sub-plate 222 and the first sub-plate 221 sequentially along the height direction of the crossbeam 212.

[0088] In other implementations, such as Figure 4 and Figure 6 As shown, the connector 23 passes through the crossbeam 212 and the second sub-plate 222 along the height direction of the crossbeam 212.

[0089] In some other embodiments, the connector 23 extends through the crossbeam 212 and the first sub-plate 221 along the height direction of the crossbeam 212.

[0090] Understandably, on the one hand, the through-type design of the connector 23, compared to other non-through-type designs, offers higher connection strength and stability. During the through-type process, the connector 23 forms multi-point contact and locking with the crossbeam 212, the first sub-plate 221, and / or the second sub-plate 222, thereby reducing performance degradation or safety hazards caused by loose connections or failures. It can more effectively resist vibrations and impacts generated by the battery cell pack 10 during charge and discharge cycles, and reduce deformation and damage to the liquid cooling plate 22 caused by external forces, thus enhancing the structural strength of the entire battery 1 housing 20. On the other hand, the through-type connection design simplifies the assembly process. By installing the connector 23 once, the liquid cooling plate 22 and the crossbeam 212 can be fixed, reducing assembly steps and the number of tools required, and improving production efficiency and assembly accuracy.

[0091] The battery 1 provided in this application embodiment, through the structural design of the connector 23 penetrating the crossbeam 212 and penetrating at least one of the first sub-plate 221 and the second sub-plate 222, forms multi-point contact and locking with the crossbeam 212, the first sub-plate 221 and / or the second sub-plate 222 during the penetration process. This reduces performance degradation or safety hazards caused by loose or failed connections, and can more effectively resist the vibration and impact generated by the battery cell pack 10 during charge and discharge cycles. It also reduces the deformation and damage of the liquid cooling plate 22 caused by external forces, thereby enhancing the structural strength of the entire battery 1 housing 20. At the same time, the through-type connection design simplifies the assembly process. By installing the connector 23 once, the liquid cooling plate 22 and the crossbeam 212 can be fixed, reducing the number of assembly steps and required tools, and improving production efficiency and assembly accuracy.

[0092] According to some embodiments of this application, such as Figures 4-6 As shown, the liquid cooling plate 22 has a recessed platform 223 protruding toward the crossbeam 212, and the connector 23 passes through the crossbeam 212 and the recessed platform 223. At least a portion of the connector 23 is installed in the recessed platform 223.

[0093] It is understandable that, such as Figures 4-6 As shown, since both the crossbeam 212 and the liquid cooling plate 22 are thin plates, that is, the thickness of the crossbeam 212 and the liquid cooling plate 22 is small, and the connector 23 is designed as a through assembly, in this case, after the connector 23 is installed on the crossbeam 212 and the liquid cooling plate 22, the connector 23 will inevitably protrude upward from the top surface of the liquid cooling plate 22. Since the liquid cooling plate 22 has a recessed platform 223 that protrudes towards the crossbeam 212 and is connected to the connector 23, the height of the recessed platform 223 is less than the height of the top surface of the liquid cooling plate 22. This height difference provides a certain accommodating space for the connector 23. At least part of the connector 23 can be placed in the accommodating space formed by the recessed platform 223, reducing the probability of the connector 23 directly contacting the battery cell pack 10 above.

[0094] The battery 1 provided in this application embodiment, through the setting of the aforementioned recessed platform 223, provides a certain space for the protruding connector 23 by the height difference between the top surface of the recessed platform 223 and the liquid cooling plate 22. This reduces the probability that the connector 23 will not directly contact the battery cell group 10 above after installation, effectively avoiding potential damage to the battery cell group 10 that the connector 23 may cause, such as scratches, indentations or short circuits, thereby protecting the integrity and safety of the battery cell group 10.

[0095] According to some embodiments of this application, such as Figure 3 As shown, the crossbeam 212 has a receiving groove 2121 on the side facing the liquid cooling plate 22, and the second sub-plate 222 has a protrusion 2223 that protrudes toward the crossbeam 212 and forms a flow channel with the first sub-plate 221. At least a portion of the protrusion 2223 is installed in the receiving groove 2121.

[0096] like Figure 3 As shown, the second sub-plate 222 may have multiple protrusions 2223, which may be spaced apart along the width direction. Multiple means two or more. The first sub-plate 221 may be designed as a flat and continuous plate structure. The multiple protrusions 2223 and the first sub-plate 221 may form a flow channel for coolant flow. On the second sub-plate 222, the portion between two adjacent protrusions 2223 may be designed as a flat and continuous plate structure. The portion between two adjacent protrusions 2223 is attached to the first sub-plate 221 and fixedly connected by brazing or bonding.

[0097] For example, such as Figure 3 As shown, the protrusion 2223 can be separated from the bottom wall of the receiving groove 2121.

[0098] It is understandable that if the first sub-plate 221, the second sub-plate 222, and the crossbeam 212 are stacked sequentially only in the height direction, the height space occupied by the first sub-plate 221, the second sub-plate 222, and the crossbeam 212 is too large. If the overall volume of the battery 1 is not increased, the space left for the battery cell pack 10 and other components will be compressed. However, if the overall volume of the battery 1 is increased, the energy density of the energy storage system will be affected. When the crossbeam 212 has a receiving groove 2121 on the side facing the liquid cooling plate 22 and at least a portion of the protrusion 2223 on the second sub-plate 222 is located in the receiving groove 2121, at least a portion of the protrusion 2223 and at least a portion of the crossbeam 212 can be located in the same height space, greatly reducing the space occupied by the housing 20, thereby improving the compactness of the battery 1 and reducing the overall volume of the battery 1, and thus improving the energy density of the energy storage system.

[0099] The battery 1 provided in this application embodiment, through the structural design of the crossbeam 212 having a receiving groove 2121 and at least a portion of the protrusion 2223 located in the receiving groove 2121, significantly reduces the height space occupied by the liquid cooling plate 22, thereby reducing the height of the housing 20 accordingly. This improves the compactness of the battery 1 and reduces the overall volume of the battery 1, improving the space utilization of the battery 1, realizing the miniaturization and lightweight design of the battery 1, and further improving the storage capacity and energy density of the energy storage system.

[0100] According to some embodiments of this application, such as Figures 4-6 As shown, the crossbeam 212 includes a connecting platform 2122 formed between the receiving grooves 2121, and the connecting platform 2122 is connected to the liquid cooling plate 22 via a connector 23.

[0101] In this embodiment, the crossbeam 212 may include a plurality of connecting platforms 2122 spaced apart along the length and width directions. Therefore, a plurality of connectors 23 may be provided on a single crossbeam 212, and the plurality of connectors 23 may also be spaced apart along the length and width directions. The connecting platforms 2122 protrude toward the direction close to the liquid cooling plate 22, so that the aforementioned receiving groove 2121 can be formed between two adjacent connecting platforms 2122.

[0102] In other embodiments, the crossbeam 212 may include multiple irregularly distributed connecting platforms 2122. Therefore, multiple connectors 23 may be provided on a single crossbeam 212, and the multiple connectors 23 may also be irregularly distributed.

[0103] In this context, "multiple" means two or more. For example, in some embodiments, the crossbeam 212 may include nine connecting platforms 2122, and correspondingly, nine connectors 23 may be provided on a single crossbeam 212.

[0104] Thus, due to the multiple receiving slots 2121 and multiple connecting platforms 2122 arranged alternately along the length direction, and the multiple connecting platforms 2122 arranged separately along the width direction, the entire crossbeam 212 has uneven walls near the liquid cooling plate 22 and walls away from the liquid cooling plate 22, which enhances the structural strength of the crossbeam 212 itself.

[0105] The battery 1 provided in this application embodiment significantly enhances the structural strength and load-bearing capacity of the crossbeam 212 through the aforementioned connection platform 2122. It also helps the liquid cooling plate 22 to be stably installed on the crossbeam 212, thereby improving the structural stability of the entire housing 20. At the same time, the connection platform 2122 provides clear positioning and guidance for the installation of the connector 23, making the assembly process simpler and faster. When maintenance or replacement of the liquid cooling plate 22 is required, the connection relationship between the connection platform 2122 and the liquid cooling plate 22 is clear and easy to disassemble and reinstall, reducing maintenance costs and time.

[0106] According to some embodiments of this application, such as Figure 4 As shown, the connector 23 passes through the crossbeam 212 and the second sub-plate 222, and the first sub-plate 221 is provided with a first clearance opening 2211 for installing the connector 23.

[0107] The shape of the first clearance opening 2211 may include, but is not limited to, a circle, a square, an oval, or other polygons, etc., and is not restricted here.

[0108] For example, in some embodiments, the first clearance opening 2211 is circular in shape.

[0109] like Figure 4 As shown, the minimum width of the first clearance opening 2211 can be greater than the maximum width of the connector 23, so that the connector 23 can pass through the first clearance opening 2211 without interference during installation, and finally pass through and connect the crossbeam 212 and the second sub-plate 222. The assembly direction of the connector 23 can be from the first sub-plate 221 to the crossbeam 212.

[0110] The shape and size of the first clearance opening 2211 can also be adjusted according to the specific size and shape of the connector 23 to meet different design requirements. This design flexibility makes the housing 20 more adaptable to diverse application scenarios.

[0111] The battery 1 provided in this application embodiment has a structural design in which the connector 23 passes through the first clearance opening 2211 and is connected to the crossbeam 212 and the second sub-plate 222. The first clearance opening 2211 facilitates the installation of the connector 23. During the assembly process, the connector 23 can easily pass through the first clearance opening 2211 and connect with the crossbeam 212 and the second sub-plate 222 without additional space adjustment or complicated operations. This greatly improves the assembly efficiency and reduces the assembly cost. At the same time, the design of the first clearance opening 2211 helps to reduce the stress concentration of the connector 23 on the first sub-plate 221 during the installation process. By providing sufficient installation space and freedom for the connector 23, the connector 23 will not cause excessive pressure or deformation to the first sub-plate 221 during the installation process, thereby extending the service life of the housing 20.

[0112] According to some embodiments of this application, such as Figure 4 As shown, the connector 23 includes a first rivet nut 231, the head 2311 of the first rivet nut 231 abuts against the side of the second sub-plate 222 away from the crossbeam 212, and the tail 2312 of the first rivet nut 231 passes through the crossbeam 212 and the second sub-plate 222.

[0113] The material of the first rivet nut 231 may include, but is not limited to, carbon steel, stainless steel, aluminum alloy or titanium alloy, etc., without restriction here.

[0114] For example, in some embodiments, the first rivet nut 231 is made of stainless steel.

[0115] Understandably, rivet nuts allow for installation when only one side is operable, which is very useful for structures where space is limited or it is difficult to fasten from the other side. Therefore, in this embodiment, the first rivet nut 231 can be fully adapted to the working condition of unidirectional assembly with the assembly direction from the first sub-plate 221 to the crossbeam 212.

[0116] In actual implementation, such as Figure 4 As shown, Figure 4 The first rivet nut 231 shown is in its natural state, that is, its undeformed state before rivet installation. During the installation process, the tail 2312 of the first rivet nut 231 is first passed sequentially through the first clearance opening 2211, the pre-drilled holes on the second sub-plate 222, and the pre-drilled holes on the crossbeam 212. Then, a rivet gun or other special tool is used to clamp the tail 2312 of the first rivet nut 231, and the rivet gun applies pulling force. The tail 2312 of the first rivet nut 231 expands and deforms radially under tension to form a flange. This flange abuts against the side of the crossbeam 212 away from the second sub-plate 222, while simultaneously securing the head 2311 of the first rivet nut 231 to the side of the second sub-plate 222 away from the crossbeam 212. Thus, after the riveting operation is completed, the second sub-plate 222 and the crossbeam 212 can be tightly clamped between the flange formed by the tail 2312 of the first rivet nut 231 and the head 2311 of the first rivet nut 231.

[0117] The battery 1 provided in this application embodiment, through the above-described design of the connector 23 including the first rivet nut 231, combined with the assembly method design of the head 2311 and the tail 2312 of the first rivet nut 231, can generate a strong locking force during installation, realizing a tight fit between the connector 23 and the component, thereby improving the strength and stability of the connection. At the same time, the head 2311 of the first rivet nut 231 is installed in the recess 223. Since the height of the head 2311 of the first rivet nut 231 is small, the risk of direct contact between the connector 23 and the battery cell 10 is further reduced. In addition, using the first rivet nut 231 as the connector 23 can greatly simplify the assembly process. Compared with the traditional bolt and nut connection method, the first rivet nut 231 does not require additional tightening tools or steps. It can be tightened simply by using a specific installation tool. This not only improves the assembly efficiency but also reduces the assembly cost.

[0118] According to some embodiments of this application, such as Figure 4 As shown, a first structural adhesive 26 is provided between the crossbeam 212 and the second sub-plate 222, and the first structural adhesive 26 is distributed in the peripheral area of ​​the connector 23.

[0119] The first structural adhesive 26 can be disposed at the riveting interface between the crossbeam 212 and the second sub-plate 222. The first structural adhesive 26 can be, but is not limited to, epoxy resin structural adhesive, acrylic structural adhesive, polyurethane structural adhesive, anaerobic structural adhesive, pressure-sensitive adhesive or cyanoacrylate adhesive, etc. There are no restrictions here.

[0120] For example, in some embodiments, the first structural adhesive 26 is an epoxy resin structural adhesive.

[0121] Understandably, by adding a first structural adhesive 26 between the crossbeam 212 and the second sub-plate 222 on top of the connector 23, the bonding force between the connector 23 and the crossbeam 212 and the second sub-plate 222 can be strengthened. This not only fills the tiny gaps between the connector 23 and the crossbeam 212 and the second sub-plate 222, but also forms a strong adhesive force through chemical and physical actions, thereby improving the overall strength and stability of the connection. At the same time, the first structural adhesive 26 can evenly distribute stress on the bonding surface, reducing the occurrence of stress concentration, which helps to reduce fatigue damage to the connector 23 and its surrounding area, and improves the durability of the connection between the crossbeam 212 and the second sub-plate 222. During operation, the battery 1 may be affected by vibration and impact. The elasticity and viscosity of the first structural adhesive 26 can absorb this energy, reduce stress concentration and fatigue damage at the connection, reduce the deformation of the crossbeam 212 and the second sub-plate 222, and extend the service life of the crossbeam 212 and the liquid cooling plate 22.

[0122] The battery 1 provided in this application embodiment, through the provision of the first structural adhesive 26, strengthens the bonding force between the connector 23 and the crossbeam 212 and the second sub-plate 222 on the basis of the connector 23, improves the overall connection strength and stability, and at the same time evenly distributes the stress on the bonding surface, reduces the occurrence of stress concentration, helps to reduce fatigue damage to the connector 23 and its surrounding area, improves the durability of the connection between the crossbeam 212 and the second sub-plate 222, and reduces stress concentration and fatigue damage at the connection, reduces the deformation of the crossbeam 212 and the second sub-plate 222, and extends the service life of the crossbeam 212 and the liquid cooling plate 22.

[0123] According to some embodiments of this application, such as Figure 5 As shown, the connector 23 passes through the crossbeam 212 and the first sub-plate 221, and the second sub-plate 222 is provided with a second clearance opening 2221 for installing the connector 23.

[0124] The shape of the second clearance opening 2221 may include, but is not limited to, a circle, a square, an oval, or other polygons, etc., and is not restricted here.

[0125] For example, in some embodiments, the second clearance opening 2221 is circular in shape.

[0126] like Figure 5 As shown, the minimum width of the second clearance opening 2221 can be greater than the maximum width of the connector 23, so that the connector 23 can pass through the second clearance opening 2221 without interference during installation, and pass through and connect to the crossbeam 212 and the first sub-plate 221. The assembly direction of the connector 23 can be from the crossbeam 212 to the first sub-plate 221.

[0127] The shape and size of the second clearance opening 2221 can also be adjusted according to the specific size and shape of the connector 23 to meet different design requirements. This design flexibility makes the housing 20 more adaptable to diverse application scenarios.

[0128] The battery 1 provided in this application embodiment has a structural design in which the connector 23 passes through the second clearance opening 2221 and is connected to the crossbeam 212 and the first sub-plate 221. The second clearance opening 2221 facilitates the installation of the connector 23. During the assembly process, the connector 23 can easily pass through the second clearance opening 2221 and connect with the crossbeam 212 and the first sub-plate 221 without additional space adjustment or complicated operations. This greatly improves assembly efficiency and reduces assembly costs. At the same time, the design of the second clearance opening 2221 helps to reduce the stress concentration of the connector 23 on the second sub-plate 222 during the installation process. By providing sufficient installation space and freedom for the connector 23, the connector 23 will not cause excessive pressure or deformation to the second sub-plate 222 during the installation process, thereby extending the service life of the housing 20.

[0129] According to some embodiments of this application, such as Figure 5 As shown, the connector 23 includes a second rivet nut 232. The head 2321 of the second rivet nut 232 abuts against the side of the crossbeam 212 away from the second sub-plate 222, and the tail 2322 of the second rivet nut 232 passes through the crossbeam 212, the first sub-plate 221 and the second sub-plate 222.

[0130] The material of the second rivet nut 232 may include, but is not limited to, carbon steel, stainless steel, aluminum alloy or titanium alloy, etc. There are no restrictions here.

[0131] For example, in some embodiments, the second rivet nut 232 is made of aluminum alloy.

[0132] Understandably, rivet nuts allow for installation when only one side is operable, which is very useful for structures where space is limited or it is difficult to fasten from the other side. Therefore, in this embodiment, the second rivet nut 232 can be fully adapted to the working condition of unidirectional assembly with the assembly direction from the crossbeam 212 to the first sub-plate 221.

[0133] In actual implementation, such as Figure 5 As shown, Figure 5The second rivet nut 232 shown is in its natural state, that is, its undeformed state before rivet installation. During the installation process, firstly, the tail 2322 of the second rivet nut 232 is passed sequentially through the pre-drilled holes on the crossbeam 212, the second clearance opening 2221, and the pre-drilled holes on the second sub-plate 222. Then, a rivet gun or other special tool is used to clamp the tail 2322 of the second rivet nut 232, and the rivet gun applies tension to... The tail 2322 of the second rivet nut 232 expands and deforms radially under tension to form a flange. This flange abuts against the side of the first sub-plate 221 away from the second sub-plate 222, while simultaneously fastening the head 2321 of the second rivet nut 232 to the side of the crossbeam 212 away from the second sub-plate 222. Thus, after the riveting operation is completed, the first sub-plate 221 and the crossbeam 212 can be tightly clamped between the flange formed by the tail 2322 of the second rivet nut 232 and the head 2321 of the second rivet nut 232.

[0134] The battery 1 provided in this application embodiment, through the above-described design of the connector 23 including the second rivet nut 232, combined with the assembly method design of the head 2321 and the tail 2322 of the second rivet nut 232, can generate a strong locking force during installation, realizing a tight fit between the connector 23 and the component, thereby improving the strength and stability of the connection. Moreover, compared with the traditional bolt and nut connection method, the second rivet nut 232 does not require additional tightening tools or steps, and can be tightened simply by using a specific installation tool. This not only improves assembly efficiency but also reduces assembly costs.

[0135] According to some embodiments of this application, such as Figure 5 As shown, battery 1 also includes a separator 24.

[0136] The separator 24 is installed between the battery cell pack 10 and the liquid cooling plate 22, and the tail 2322 of the second rivet nut 232 is spaced apart from the separator 24.

[0137] The partition 24 can have good electrical insulation properties. Specifically, the material of the partition 24 can be, but is not limited to, polypropylene, polyethylene or polytetrafluoroethylene, etc. There are no restrictions here.

[0138] For example, in some embodiments, the partition 24 is made of polyethylene.

[0139] It is understandable that, such as Figure 5As shown, since the assembly direction of the second rivet nut 232 is from the crossbeam 212 to the first sub-plate 221, the tail 2322 of the relatively tall second rivet nut 232 will protrude a considerable distance from the top surface of the liquid cooling plate 22 before riveting. Even after the tail 2322 of the second rivet nut 232 is formed by riveting and forming a flange, it is still very likely that it will still protrude a considerable distance from the top surface of the liquid cooling plate 22. In this case, the tail 2322 of the second rivet nut 232 can easily come into contact with the battery cell assembly 10, causing scratches or short circuits on the surface of the battery cell assembly 10. Therefore, a partition 24 is added between the liquid cooling plate 22 and the battery cell 11. The partition 24 can spatially separate the second rivet nut 232 and the battery cell assembly 10, significantly reducing the probability of the tail 2322 of the second rivet nut 232 hitting the battery cell assembly 10 under the condition that the housing 20 is subjected to external forces such as vibration and impact, thus maintaining the safe and stable operation of the battery cell assembly 10.

[0140] The battery 1 provided in this application embodiment, through the setting of the above-mentioned partition 24, separates the tail 2322 of the second rivet nut 232 from the battery cell group 10, effectively reducing the risk of electrical short circuit caused by direct contact between the tail 2322 of the second rivet nut 232 and the battery cell group 10. Even under extreme operating conditions, such as expansion of the battery cell 11 or increased vibration, a sufficient safe distance can be maintained to ensure the stable operation of the electrical system.

[0141] According to some embodiments of this application, such as Figure 5 As shown, a second structural adhesive 27 is provided between the crossbeam 212 and the first sub-plate 221, and the second structural adhesive 27 is distributed in the peripheral area of ​​the connector 23.

[0142] The second structural adhesive 27 can be disposed at the riveting interface between the crossbeam 212 and the first sub-plate 221. The second structural adhesive 27 can be, but is not limited to, epoxy resin structural adhesive, acrylic structural adhesive, polyurethane structural adhesive, anaerobic structural adhesive, pressure-sensitive adhesive or cyanoacrylate adhesive, etc. There are no restrictions here.

[0143] For example, in some embodiments, the second structural adhesive 27 is a polyurethane structural adhesive.

[0144] Understandably, by adding a second structural adhesive 27 between the crossbeam 212 and the first sub-plate 221 on top of the connector 23, the bonding force between the connector 23 and the crossbeam 212 and the first sub-plate 221 can be strengthened. This not only fills the tiny gaps between the connector 23 and the crossbeam 212 and the first sub-plate 221, but also forms a strong adhesive force through chemical and physical actions, thereby improving the overall strength and stability of the connection. At the same time, the second structural adhesive 27 can evenly distribute stress on the bonding surface, reducing stress concentration and helping to reduce fatigue damage to the connector 23 and its surrounding area, thus improving the durability of the connection between the crossbeam 212 and the first sub-plate 221. During operation, the battery 1 may be affected by vibration and impact. The elasticity and viscosity of the second structural adhesive 27 can absorb this energy, reducing stress concentration and fatigue damage at the connection, reducing the deformation of the crossbeam 212 and the first sub-plate 221, and extending the service life of the crossbeam 212 and the liquid cooling plate 22.

[0145] The battery 1 provided in this application embodiment, through the provision of the second structural adhesive 27, strengthens the bonding force between the connector 23 and the crossbeam 212 and the first sub-plate 221 on the basis of the connector 23, improves the overall connection strength and stability, and at the same time evenly distributes the stress on the bonding surface, reduces the occurrence of stress concentration, helps to reduce fatigue damage to the connector 23 and its surrounding area, improves the durability of the connection between the crossbeam 212 and the first sub-plate 221, and reduces stress concentration and fatigue damage at the connection, reduces the deformation of the crossbeam 212 and the first sub-plate 221, and extends the service life of the crossbeam 212 and the liquid cooling plate 22.

[0146] According to some embodiments of this application, such as Figure 6 As shown, the connector 23 passes through the crossbeam 212 and is connected to the first sub-plate 221. The second sub-plate 222 is provided with a third clearance opening 2222 for installing the connector 23.

[0147] The shape of the third clearance opening 2222 may include, but is not limited to, a circle, a square, an oval, or other polygons, etc., and is not restricted here.

[0148] For example, in some embodiments, the third clearance opening 2222 is square in shape.

[0149] like Figure 6 As shown, the minimum width of the third clearance opening 2222 can be greater than the maximum width of the connector 23, so that the connector 23 can pass through the third clearance opening 2222 without interference during installation, pass through and connect to the crossbeam 212, and connect to the first sub-plate 221. The assembly direction of the connector 23 can be from the crossbeam 212 to the first sub-plate 221.

[0150] The shape and size of the third clearance opening 2222 can also be adjusted according to the specific size and shape of the connector 23 to meet different design requirements. This design flexibility makes the housing 20 more adaptable to diverse application scenarios.

[0151] The battery 1 provided in this application embodiment has a structural design in which the connector 23 passes through the third clearance opening 2222 and is connected to the crossbeam 212 and the first sub-plate 221. The third clearance opening 2222 facilitates the installation of the connector 23. During the assembly process, the connector 23 can easily pass through the third clearance opening 2222, pass through the crossbeam 212, and connect with the first sub-plate 221 without the need for additional space adjustment or complicated operations. This greatly improves the assembly efficiency and reduces the assembly cost. At the same time, the design of the third clearance opening 2222 helps to reduce the stress concentration of the connector 23 on the second sub-plate 222 during the installation process. By providing sufficient installation space and freedom for the connector 23, the connector 23 will not cause excessive pressure or deformation to the second sub-plate 222 during the installation process, thereby extending the service life of the housing 20.

[0152] According to some embodiments of this application, such as Figure 6 As shown, the connector 23 includes a press-fit rivet 233. The head 2331 of the press-fit rivet 233 abuts against the side of the crossbeam 212 away from the second sub-plate 222, and the tail 2332 of the press-fit rivet 233 passes through the crossbeam 212 and the second sub-plate 222. The first sub-plate 221 has a groove recessed toward the battery cell assembly 10, and at least a portion of the tail 2332 of the press-fit rivet 233 is mounted in the groove.

[0153] The material of the press-fit rivet 233 can be, but is not limited to, carbon steel, alloy steel, stainless steel, aluminum alloy or titanium alloy, etc. There are no restrictions here.

[0154] For example, in some embodiments, the rivet 233 is made of carbon steel.

[0155] The pressing process of the press rivet 233 may include SPR (Self-Piercing Riveting) or F-SPR (Friction Stir Riveting), etc., without limitation.

[0156] In actual implementation, such as Figure 6As shown, taking the self-piercing riveting (SPR) process of the press-fit rivet 233 as an example, during the assembly process of the press-fit rivet 233: First, the pressure ring presses down to tighten the crossbeam 212 and the first sub-plate 221 to be riveted. The press-fit rivet 233, driven by the punch, pre-tightens the crossbeam 212 and the first sub-plate 221 vertically downwards. Then, the punch moves downwards, pushing the press-fit rivet 233 to force it to pierce the crossbeam 212. At the same time, the rivet also drives the first sub-plate 221 to undergo plastic deformation into the die. As the press-fit process proceeds, the tail 2332 of the press-fit rivet 233 gradually opens, and the first sub-plate 221... Plate 221 undergoes plastic deformation and gradually fills the die cavity. Under the combined action of the punch and the die boss, the tail 2332 of the press rivet 233 expands outward, forming the aforementioned groove on the first sub-plate 221. The tail 2332 of the press rivet 233 is embedded in the groove on the first sub-plate 221, thus forming a mechanical interlocking structure between the press rivet 233, the crossbeam 212, and the first sub-plate 221. When the punch presses the press rivet 233 down until the head 2331 of the press rivet 233 is in close contact with and flush with the side of the crossbeam 212 away from the second sub-plate 222, the riveting can be considered complete. At this time, the blank holder releases the blank holder force, the punch returns to the initial position, and the riveting ends.

[0157] The battery 1 provided in this application embodiment, through the design of the connector 23 including the press rivet 233, combined with the assembly method design of the head 2331 and the tail 2332 of the press rivet 233, can achieve efficient connection and fixation between the crossbeam 212, the first sub-plate 221 and the connector 23. It does not require pre-drilling. The press rivet 233 is directly driven by the punch to pierce the material and open the tail 2332 of the press rivet 233 to form a mechanical interlocking structure, which greatly improves the connection efficiency and strength. The press riveting process has a high degree of automation, which can not only greatly simplify the manufacturing process and improve production efficiency, but also reduce the errors and damage that may be caused by pre-drilling, thus improving the overall quality of the product. In addition, the tail 2332 of the press rivet 233 is tightly embedded in the groove of the first sub-plate 221, forming a tight contact surface, which helps to improve the sealing of the connection part.

[0158] According to some embodiments of this application, such as Figure 6 As shown, battery 1 also includes an insulating cover 25.

[0159] The insulating cover 25 is mounted on the rivet 233 and is fixedly connected to the first sub-plate 221.

[0160] The insulating cover 25 can be a hollow structure with one side open. Specifically, the shape of the insulating cover 25 can be cylindrical, cuboid, or prismatic, etc., without limitation.

[0161] For example, in some embodiments, the insulating cover 25 is cylindrical in shape.

[0162] The material of the insulating cover 25 may include, but is not limited to, silicone rubber, heat-shrinkable material or polymer resin material, etc. There are no restrictions here.

[0163] For example, in some embodiments, the insulating cover 25 is made of a polymer resin material, such as polyethylene or polyvinyl chloride.

[0164] The connection method between the insulating cover 25 and the first sub-board 221 may include, but is not limited to, bonding, welding or snap-fitting, etc., and is not limited here.

[0165] For example, in some embodiments, the connection between the insulating cover 25 and the first sub-board 221 is by adhesive bonding.

[0166] Understandably, on the one hand, since the press-fit rivet 233 is a metal component, it may come into contact with the battery cell pack 10 or other electrical components inside the housing 20, posing a risk of electrical short circuit. The addition of the insulating cover 25 effectively reduces the direct contact between the press-fit rivet 233 and surrounding electrical components, thereby preventing electrical short circuits and improving the electrical safety of the housing 20. On the other hand, in humid, dusty, or corrosive environments, the metal connector 23 is easily damaged, which affects its connection performance and reliability. The insulating cover 25 can protect the press-fit rivet 233, preventing it from being corroded or oxidized by environmental factors, and extending its service life.

[0167] The battery 1 provided in this application embodiment effectively reduces the direct contact between the rivet 233 and surrounding electrical components by setting the above-mentioned insulating cover 25, thereby preventing the occurrence of electrical short circuits and improving the electrical safety of the housing 20. At the same time, the insulating cover 25 can protect the rivet 233, helping to reduce the risk of corrosion or oxidation of the rivet 233 due to environmental factors, thereby extending the service life of the rivet 233.

[0168] According to some embodiments of this application, such as Figure 6 As shown, a third structural adhesive 28 is provided between the crossbeam 212 and the first sub-plate 221, and the third structural adhesive 28 is distributed in the peripheral area of ​​the connector 23.

[0169] The third structural adhesive 28 can be disposed at the riveting interface between the crossbeam 212 and the first sub-plate 221. The third structural adhesive 28 may include, but is not limited to, epoxy resin structural adhesive, acrylic structural adhesive, polyurethane structural adhesive, anaerobic structural adhesive, pressure-sensitive adhesive or cyanoacrylate adhesive, etc. There are no restrictions here.

[0170] For example, in some embodiments, the third structural adhesive 28 is a cyanoacrylate adhesive.

[0171] Understandably, by adding a third structural adhesive 28 between the crossbeam 212 and the first sub-plate 221 on top of the connector 23, the bonding force between the connector 23 and the crossbeam 212 and the first sub-plate 221 can be strengthened. This not only fills the tiny gaps between the connector 23 and the crossbeam 212 and the first sub-plate 221, but also forms a strong adhesive force through chemical and physical actions, thereby improving the overall strength and stability of the connection. At the same time, the third structural adhesive 28 can evenly distribute stress on the bonding surface, reducing stress concentration and helping to reduce fatigue damage to the connector 23 and its surrounding area, thus improving the durability of the connection between the crossbeam 212 and the first sub-plate 221. During operation, the battery 1 may be affected by vibration and impact. The elasticity and viscosity of the third structural adhesive 28 can absorb this energy, reducing stress concentration and fatigue damage at the connection, reducing the deformation of the crossbeam 212 and the first sub-plate 221, and extending the service life of the crossbeam 212 and the liquid cooling plate 22.

[0172] The battery 1 provided in this application embodiment, through the provision of the third structural adhesive 28, strengthens the bonding force between the connector 23 and the crossbeam 212 and the first sub-plate 221 based on the connector 23, improving the overall connection strength and stability. Simultaneously, it evenly distributes stress on the bonding surface, reducing stress concentration and helping to reduce fatigue damage to the connector 23 and its surrounding area. This improves the durability of the connection between the crossbeam 212 and the first sub-plate 221, reduces stress concentration and fatigue damage at the connection point, minimizes deformation of the crossbeam 212 and the first sub-plate 221, and extends the service life of the crossbeam 212 and the liquid cooling plate 22. According to some embodiments of this application...

[0173] This application also provides an energy storage system, including: a battery 1 as described above.

[0174] The energy storage system provided in this application embodiment significantly improves the connection strength between the liquid cooling plate 22 and the frame 21 through the arrangement of the battery 1, effectively dispersing the weight of the battery cell pack 10 and the mechanical stress generated during charging and discharging. At the same time, the crossbeam 212 can effectively support the large surface of the liquid cooling plate 22, which helps to reduce the deformation of the liquid cooling plate 22 under long-term use, thereby improving the heat dissipation efficiency and temperature uniformity of the liquid cooling plate 22, and enhancing the structural stability of the entire housing 20, thereby improving the reliability of the battery cell pack 10 and extending the service life of the battery 1.

[0175] According to some embodiments of this application, see Figures 1-6As shown, this application provides a battery 1, which includes: a housing 20 and at least one battery cell assembly 10. The housing 20 is used to accommodate at least one battery cell assembly 10; the housing 20 includes: a frame 21, a liquid cooling plate 22, and a heat exchange tube connector 23. The frame 21 includes a side frame 211 and at least one crossbeam 212 connected between the side frames 211; the liquid cooling plate 22 is fixedly connected to the side frame 211 and to the crossbeam 212, and the liquid cooling plate 22 is used to support the battery cell assembly 10, and includes a first sub-plate 221 and a second sub-plate 222 fixedly connected, the second sub-plate 222 being located between the first sub-plate 221 and the crossbeam 212; the connector 23 is connected to the crossbeam 212 and to at least one of the first sub-plate 221 and the second sub-plate 222. The connector 23 passes through the crossbeam 212 and passes through at least one of the first sub-plate 221 and the second sub-plate 222. The liquid cooling plate 22 has a recessed platform 223 protruding towards the crossbeam 212. A connector 23 passes through the crossbeam 212 and the recessed platform 223, and at least a portion of the connector 23 is installed within the recessed platform 223. The crossbeam 212 has a receiving groove 2121 on the side facing the liquid cooling plate 22. The second sub-plate 222 has a protrusion 2223 protruding towards the crossbeam 212 and forming a flow channel with the first sub-plate 221. At least a portion of the protrusion 2223 is installed within the receiving groove 2121. The crossbeam 212 includes a connecting platform 2122 formed between the receiving grooves 2121. The connecting platform 2122 is connected to the liquid cooling plate 22 via the connector 23.

[0176] The assembly between the connector 23 and the crossbeam 212 and the liquid cooling plate 22 can be implemented in the following three ways:

[0177] Firstly, the connector 23 penetrates the crossbeam 212 and the second sub-plate 222. The first sub-plate 221 has a first clearance opening 2211 for installing the connector 23. The connector 23 includes a first rivet nut 231. The head 2311 of the first rivet nut 231 abuts against the side of the second sub-plate 222 opposite to the crossbeam 212, and the tail 2312 of the first rivet nut 231 penetrates the crossbeam 212 and the second sub-plate 222. A first structural adhesive 26 is provided between the crossbeam 212 and the second sub-plate 222, and the first structural adhesive 26 is distributed in the peripheral area of ​​the connector 23.

[0178] Secondly, the connector 23 penetrates the crossbeam 212 and the first sub-plate 221, and the second sub-plate 222 is provided with a second clearance opening 2221 for installing the connector 23. The connector 23 includes a second rivet nut 232, the head 2321 of which abuts against the side of the crossbeam 212 away from the second sub-plate 222, and the tail 2322 of which penetrates the crossbeam 212, the first sub-plate 221, and the second sub-plate 222. The battery 1 also includes a separator 24, which is installed between the battery cell group 10 and the liquid cooling plate 22, and the tail 2322 of the second rivet nut 232 is spaced apart from the separator 24. A second structural adhesive 27 is provided between the crossbeam 212 and the first sub-plate 221, and the second structural adhesive 27 is distributed in the peripheral area of ​​the connector 23.

[0179] Thirdly, the connector 23 passes through the crossbeam 212 and is connected to the first sub-plate 221. The second sub-plate 222 has a third clearance opening 2222 for installing the connector 23. The connector 23 includes a press-fit rivet 233. The head 2331 of the press-fit rivet 233 abuts against the side of the crossbeam 212 away from the second sub-plate 222, and the tail 2332 of the press-fit rivet 233 passes through the crossbeam 212 and the second sub-plate 222. The first sub-plate 221 has a groove recessed towards the battery cell assembly 10, and at least a portion of the tail 2332 of the press-fit rivet 233 is installed in the groove. The battery 1 also includes an insulating cover 25, which covers the press-fit rivet 233 and is fixedly connected to the first sub-plate 221. A third structural adhesive 28 is provided between the crossbeam 212 and the first sub-plate 221, and the third structural adhesive 28 is distributed in the peripheral area of ​​the connector 23.

[0180] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0181] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery, characterized in that, include: At least one battery cell pack, and A housing for accommodating at least one of the battery cell groups; The enclosure includes: The frame includes a frame and at least one crossbeam connecting the frame sides; A liquid cooling plate is fixedly connected to the frame and the crossbeam. The liquid cooling plate is used to support the battery cell assembly and includes a first sub-plate and a second sub-plate fixedly connected to each other. The second sub-plate is located between the first sub-plate and the crossbeam. The connector is connected to the crossbeam and to at least one of the first sub-plate and the second sub-plate.

2. The battery according to claim 1, characterized in that, The connector passes through the crossbeam and passes through at least one of the first sub-plate and the second sub-plate.

3. The battery according to claim 2, characterized in that, The liquid cooling plate has a recessed platform protruding towards the crossbeam, and the connector passes through the crossbeam and the recessed platform, with at least a portion of the connector installed within the recessed platform.

4. The battery according to any one of claims 1-3, characterized in that, The crossbeam has a receiving groove on the side facing the liquid cooling plate, and the second sub-plate has a protrusion that protrudes toward the crossbeam and forms a flow channel with the first sub-plate, and at least a portion of the protrusion is installed in the receiving groove.

5. The battery according to claim 4, characterized in that, The crossbeam includes a connecting platform formed between the receiving grooves, the connecting platform being connected to the liquid cooling plate via the connector.

6. The battery according to any one of claims 1-5, characterized in that, The connector passes through the crossbeam and the second sub-plate, and the first sub-plate is provided with a first clearance opening for installing the connector.

7. The battery according to claim 6, characterized in that, The connector includes a first rivet nut, the head of which abuts against the side of the second sub-plate opposite to the crossbeam, and the tail of which passes through the crossbeam and the second sub-plate.

8. The battery according to claim 6, characterized in that, A first structural adhesive is provided between the crossbeam and the second sub-plate, and the first structural adhesive is distributed in the peripheral area of ​​the connector.

9. The battery according to any one of claims 1-5, characterized in that, The connector passes through the crossbeam and the first sub-plate, and the second sub-plate is provided with a second clearance opening for installing the connector.

10. The battery according to claim 9, characterized in that, The connector includes a second rivet nut, the head of which abuts against the side of the crossbeam away from the second sub-plate, and the tail of which passes through the crossbeam, the first sub-plate, and the second sub-plate.

11. The battery according to claim 10, characterized in that, Also includes: A separator is installed between the battery cell assembly and the liquid cooling plate, and the tail of the second rivet nut is spaced apart from the separator.

12. The battery according to claim 8, characterized in that, A second structural adhesive is provided between the crossbeam and the first sub-plate, and the second structural adhesive is distributed in the peripheral area of ​​the connector.

13. The battery according to any one of claims 1-5, characterized in that, The connector passes through the crossbeam and is connected to the first sub-plate. The second sub-plate is provided with a third clearance for installing the connector.

14. The battery according to claim 13, characterized in that, The connector includes a press-fit rivet, the head of which abuts against the side of the crossbeam away from the second sub-plate, and the tail of which penetrates the crossbeam and the second sub-plate. The first sub-plate has a groove recessed toward the battery cell assembly, and at least a portion of the tail of the press-fit rivet is mounted in the groove.

15. The battery according to claim 14, characterized in that, Also includes: An insulating cover is provided over the rivet and is fixedly connected to the first sub-plate.

16. The battery according to claim 13, characterized in that, A third structural adhesive is provided between the crossbeam and the first sub-plate, and the third structural adhesive is distributed in the peripheral area of ​​the connector.

17. An energy storage system, characterized in that, include: The battery as described in any one of claims 1-16.

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