Super-long battery module and battery pack

Abstract

The utility model relates to a super-long battery module and a battery pack, and relates to the technical field of power batteries. The super-long battery module comprises a plurality of battery cells, two side cold plates, two end plates and connecting pieces, the side cold plates and the end plates are alternately connected and define a containing space, and the containing space is used for containing the battery cells. The connecting piece penetrates through the side cold plate and is connected to the end plate so as to fix the side cold plate and the end plate. A limiting cavity is formed in the end, close to the side cooling plate, in the end plate, a rigid sleeve structure is arranged in the limiting cavity, and the rigid sleeve structure makes contact with the inner wall face of the limiting cavity. The connecting piece penetrates through the side cold plate and is connected to the rigid sleeve structure located in the limiting cavity, and after the connecting piece and the rigid sleeve structure are fixed, the side cold plate and the end plate are relatively fixed. According to the super-long battery module provided by the invention, the strength of the connecting structure can be enhanced when the side cold plates are connected with the end plates so as to meet the overall strength requirement of the battery.

Description

Technical Field

[0001] The present application relates to the field of power battery technology, and in particular, to an ultra-long battery module and a battery pack. Background Art

[0002] When assembling a power battery, multiple battery cells need to be arranged, and then end plates are set at the corresponding ends of the arranged battery cells to fix the battery cells. At the same time, when used in the side cooling solution of the battery pack, side cold plates can also be set at the other two ends of the battery cells to cool and dissipate heat. The side cold plates and end plates together form a rectangular frame structure to fix the battery cells.

[0003] In existing technologies, the side cooling solutions typically use riveting to secure the side cold plates to the end plates. However, during installation and connection, the connection structure often struggles to achieve balanced force distribution, causing some rivets to break under complex operating conditions, leading to failure of the connection structure. Furthermore, the connection between the end plate and the side cold plate is subject to shear forces, resulting in low overall strength at this location, making it difficult to meet the overall strength requirements of the battery.

[0004] Therefore, it is urgent to provide a battery structure that can enhance the strength of the connection structure when the side cold plate is connected to the end plate to meet the strength requirements of the entire battery. Utility Model Content

[0005] The purpose of this application is to provide an extra-long battery module and a battery pack, which can enhance the strength of the connection structure when the side cold plate and the end plate are connected to meet the overall strength requirements of the battery.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an embodiment of the present application provides an ultra-long battery module, which includes a plurality of battery cells, two side cold plates and two end plates and a connector, wherein the side cold plates and the end plates are alternately connected and enclose a storage space, and the storage space is used to accommodate the battery cells. The connector passes through the side cold plate and is connected to the end plate to fix the side cold plate to the end plate. A limiting cavity is provided in the end of the end plate near the side cold plate, and a rigid sleeve structure is provided in the limiting cavity, and the rigid sleeve structure contacts the inner wall surface of the limiting cavity. The connector passes through the side cold plate and is connected to the rigid sleeve structure in the limiting cavity. After the connector is fixed to the rigid sleeve structure, the side cold plate and the end plate are relatively fixed.

[0007] Based on the above-mentioned embodiments of the present application, when the end plate and the side cold plate are connected, the connection between the two is achieved through a connector. The connector can be specifically configured as a structure such as a rivet or bolt. However, unlike the prior art mentioned in this application, the technical solution of the present application is directly connected to the rigid sleeve structure within the end plate. Therefore, the shear force generated at the connection position acts directly on the rigid sleeve structure. The rigid sleeve structure is arranged in a limiting cavity formed in the end plate. The connection between the rigid sleeve structure and the end plate is a surface contact between the surface of the rigid sleeve structure and the inner wall surface of the limiting cavity, thereby expanding the contact area, making the shear force ultimately acting on the end plate smaller, and ensuring that the overall connection strength between the side cold plate and the end plate can meet the strength requirements of the entire battery. In addition, by enclosing a storage space for accommodating battery cells with the side cold plate and the end plate, the side cold plate and the end plate can achieve a technical effect similar to the crossbeam and longitudinal beam in the prior art, thereby eliminating or partially eliminating the step of separately providing the crossbeam and longitudinal beam, reducing the weight of the ultra-long battery module, and further improving the overall integration of the ultra-long battery module.

[0008] In some embodiments, the rigid sleeve structure has two first assembly surfaces and at least one connecting surface, the connecting surface being perpendicular to the first assembly surfaces, the first assembly surfaces abutting against the inner wall of the limiting cavity in a first direction, and the connecting member being fixed to the connecting surface, wherein the first direction corresponds to the thickness direction of the end plate.

[0009] Based on the above-mentioned embodiments of the present application, since the direction of the shear force at the connecting piece when the end plate is connected to the side cold plate is consistent with the thickness direction of the end plate, the first assembly surface is set to abut against the inner wall of the limiting cavity in the first direction, so that the rigid sleeve structure and the end plate are abutted through surface contact, and then when the shear force acting on the rigid sleeve structure is transmitted to the end plate, the force area of ​​the end plate is increased through surface contact, so that the shear force has less influence on the end plate, thereby achieving the enhancement of the overall strength of the connection position between the side cold plate and the end plate.

[0010] In some embodiments, the connecting member is configured as a bolt, a connecting nut is fixedly provided on the connecting surface, and the bolt is threadedly connected to the connecting nut.

[0011] Based on the above-mentioned embodiments of the present application, by setting a connecting nut on the connecting surface, on the one hand, it can facilitate the connection with the connecting piece set as a bolt, and on the other hand, the setting of the connecting nut can also strengthen the strength of the connection position of the rigid sleeve structure, thereby strengthening the overall connection strength.

[0012] In some embodiments, the rigid sleeve structure further has at least one fixing surface, which is perpendicular to the first assembly surface and the connecting surface respectively, and is connected to the inner wall of the limiting cavity in the end plate by threaded connection or riveting.

[0013] Based on the above-mentioned embodiments of the present application, the connection between the rigid sleeve structure and the end plate is strengthened by threaded connection or riveting, and since the fixing surface is perpendicular to the first assembly surface and the connecting surface, the setting of threaded connection or riveting will not affect the connection between the rigid sleeve structure and the connecting piece, nor will it affect the surface contact between the rigid sleeve structure and the end plate.

[0014] In some embodiments, the fixing surface is bonded and fixed to the inner wall of the limiting cavity.

[0015] Based on the above-mentioned embodiments of the present application, the connection between the rigid sleeve structure and the end plate is further strengthened by bonding and fixing.

[0016] In some embodiments, a reinforcing sleeve is embedded in the side cold plate, the reinforcing sleeve is welded and fixed to the side cold plate, and the connecting piece passes through the reinforcing sleeve and is fixed to the rigid sleeve structure.

[0017] Based on the above-mentioned embodiments of the present application, since a flow channel is formed in the side cold plate, on the one hand, in order to reduce the impact on the flow and sealing effect of the flow channel, and on the other hand, in order to strengthen the strength of the connection position, a reinforcing sleeve is provided on the side cold plate, and the reinforcing sleeve is welded and fixed to the side cold plate, thereby enhancing the strength of the connection position on the one hand, and avoiding affecting the sealing effect of the flow channel on the other hand.

[0018] In some embodiments, an adhesive structure is provided on a side of the side cold plate facing the battery core.

[0019] Based on the above embodiments of the present application, an adhesive structure is provided between the side cold plate and the battery cell to strengthen the connection between the two.

[0020] In some embodiments, the ultra-long battery module further includes at least one intermediate buffer plate, which is located between the two end plates, and the intermediate buffer plate is fixed to the side cold plate through the connecting member.

[0021] Based on the above-mentioned embodiments of the present application, an intermediate buffer plate is provided. At this time, the intermediate buffer plate can, on the one hand, play a reinforcing role, thereby making the overall strength of the ultra-long battery module higher. On the other hand, it can also play a buffering role, thereby realizing the connection and fixation between the two groups of battery cells on both sides, thereby adapting to the strength requirements of the ultra-long battery module and ensuring that the middle part of the ultra-long battery module is evenly stressed.

[0022] In some embodiments, at least one of the intermediate buffer plates cooperates with the end plates and the side cold plates to form at least two accommodating sub-cavities, and the battery cells are disposed in the accommodating sub-cavities.

[0023] Based on the above-mentioned embodiments of the present application, through the provision of the intermediate buffer plate, the accommodating sub-cavity formed by the cooperation of the intermediate buffer plate can better support and protect the battery cell while accommodating the battery cell.

[0024] According to a second aspect of the present application, a battery pack is provided, comprising a frame, at least one longitudinal beam, and at least two of the aforementioned extra-long battery modules. The longitudinal beam is disposed within the frame and fixedly connected to the frame. The extra-long battery module is positioned between the longitudinal beam and the frame, with both sides of the extra-long battery module fixedly connected to the longitudinal beam and the frame, respectively. Alternatively, both sides of the extra-long battery module are fixedly connected to the longitudinal beam.

[0025] Based on the above-mentioned embodiments of the present application, when the battery packs are arranged in groups, the extra-long battery modules are arranged as a whole along the length direction of the battery pack. The intermediate buffer plate structure located in the extra-long battery module can play a role similar to a crossbeam. Therefore, the crossbeam structure can be omitted, and only longitudinal beams are set for connection between adjacent extra-long battery modules, thereby ensuring the overall strength and connection strength of the battery pack while improving the overall integration of the battery pack.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the present application but do not constitute a limitation of the present application. In the accompanying drawings:

[0028] Figure 1 It is a structural schematic diagram of the ultra-long battery module provided in an embodiment of the present application.

[0029] Figure 2 This is an exploded schematic diagram of the ultra-long battery module provided in an embodiment of the present application.

[0030] Figure 3 It is a planar schematic diagram of the ultra-long battery module provided in an embodiment of the present application.

[0031] Figure 4 yes Figure 3 Schematic diagram of the cross section along the AA direction.

[0032] Figure 5 yes Figure 3 Schematic diagram of the cross section along the BB direction.

[0033] Figure 6 It is a structural schematic diagram of the end plate of the ultra-long battery module provided in an embodiment of the present application.

[0034] Figure 7 It is a cross-sectional schematic diagram of the end plate of the ultra-long battery module provided in an embodiment of the present application.

[0035] Figure 8 It is a structural schematic diagram of the rigid sleeve structure in the ultra-long battery module provided in an embodiment of the present application.

[0036] Figure 9 It is a cross-sectional schematic diagram of the side cold plate of the ultra-long battery module provided in an embodiment of the present application.

[0037] Description of Reference Numerals

[0038] 1. Battery cell; 2. Side cold plate; 21. Reinforcement sleeve; 22. Connecting pipe; 24. Flow channel; 3. End plate; 31. Limiting cavity; 5. Rigid sleeve structure; 51. First assembly surface; 52. Connecting surface; 53. Fixing surface; 54. Connecting nut; 6. Connector; 61. Bolt; 7. Intermediate buffer plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] In the description of this application, it should be noted that, unless otherwise stated, the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] When assembling a power battery module, multiple battery cell components need to be arranged, and then end fixing plates are set at the corresponding ends of the arranged battery cell components to fix the battery cell components. At the same time, when used in the side cooling solution of the battery pack, cold plates can also be set at the other two ends of the battery cell to cool and dissipate heat. The cold plate and the end fixing plate together form a rectangular frame structure to fix the battery cell components.

[0046] In existing technology, the cold plate and the end fixing plate are typically fixed together using riveting. However, during the installation process, the connection structure often struggles to achieve balanced force distribution, causing some rivets to break under complex operating conditions, leading to failure of the connection structure. Furthermore, the connection between the end fixing plate and the cold plate is subject to shear forces, resulting in low overall strength at this location, making it difficult to meet the overall strength requirements of the battery.

[0047] In order to solve the above problems in the prior art, according to the first aspect of the present application, an embodiment of the present application provides an ultra-long battery module, referring to Figures 1 to 5 As shown in , the ultra-long battery module includes a plurality of battery cells 1, two side cold plates 2, two end plates 3, and a connector 6. The side cold plates 2 and the end plates 3 are alternately connected and enclose a storage space, which is used to accommodate the battery cells 1. The connector 6 passes through the side cold plates 2 and is connected to the end plates 3 to fix the side cold plates 2 and the end plates 3. Among them, a limiting cavity 31 is provided at the end of the end plate 3 near the side cold plate 2, and a rigid sleeve structure 5 is provided in the limiting cavity 31. The rigid sleeve structure 5 is in contact with the inner wall surface of the limiting cavity 31. The connector 6 passes through the side cold plate 2 and is connected to the rigid sleeve structure 5 in the limiting cavity 31. After the connector 6 is fixed to the rigid sleeve structure 5, the side cold plate 2 and the end plate 3 are relatively fixed.

[0048] Based on the above-mentioned embodiments of the present application, when the end plate 3 and the side cold plate 2 are connected, the connection between the two is achieved through the connecting member 6. The connecting member 6 can be specifically set to a structure such as a rivet or a bolt, but unlike the prior art mentioned in the present application, the connecting member 6 in the technical solution of the present application is directly connected to the rigid sleeve structure 5 in the end plate 3. Therefore, the shear force generated at the connection position acts directly on the rigid sleeve structure 5, and the rigid sleeve structure 5 is set in the limiting cavity 31 formed on the end plate 3. The connection between the rigid sleeve structure 5 and the end plate 3 is a surface contact between the surface of the rigid sleeve structure 5 and the inner wall surface of the limiting cavity 31, thereby expanding the contact area, so that the final shear force acting on the end plate 3 is smaller, so that the overall connection strength between the side cold plate 2 and the end plate 3 can meet the overall strength requirements of the battery.

[0049] In addition, the accommodating space enclosed by the side cold plate 2 and the end plate 3 is used to accommodate the battery cell 1. At this time, the side cold plate 2 and the end plate 3 can achieve technical effects similar to those of the cross beams and longitudinal beams in the prior art, thereby eliminating or partially eliminating the steps of separately setting the cross beams and longitudinal beams, reducing the weight of the ultra-long battery module, and further improving the overall integration of the ultra-long battery module.

[0050] Furthermore, in the present application, the connecting member 6 can be configured as any suitable structure, such as a bolt or a rivet. In an exemplary embodiment provided in the present application, reference is made to Figure 5 As shown in , the connecting member 6 is configured as a bolt 61 , and the bolt 61 is made of high-strength carbon steel, thereby enhancing the strength of the connecting member 6 itself, making the connection position between the end plate 3 and the side cold plate 2 stronger.

[0051] In the present application, the specific structure of the rigid sleeve structure 5 can be connected in any suitable manner as long as the fixing effect with the limiting cavity 31 is satisfied.

[0052] refer to Figures 6 to 8 As shown in , in an exemplary embodiment provided in the present application, the rigid sleeve structure 5 may have two first assembly surfaces 51 and at least one connection surface 52. The connection surface 52 is perpendicular to the first assembly surface 51. The first assembly surface 51 abuts against the inner wall of the limiting cavity 31 in the first direction. The connector 6 is fixed to the connection surface 52. The first direction corresponds to the thickness direction of the end plate 3.

[0053] Based on the above-mentioned embodiments of the present application, since the direction of the shear force at the connecting member 6 when the end plate 3 is connected to the side cold plate 2 is consistent with the thickness direction of the end plate 3, the first assembly surface 51 is set to abut against the inner wall of the limiting cavity 31 in the first direction, so that the rigid sleeve structure 5 and the end plate 3 are abutted through surface contact, and then the shear force acting on the rigid sleeve structure 5 is transmitted to the end plate 3. The force area of ​​the end plate 3 is increased by surface contact, so that the shear force has less effect on the end plate 3, thereby achieving the enhancement of the overall strength of the connection position between the side cold plate 2 and the end plate 3.

[0054] Furthermore, in some embodiments of the present application, the rigid sleeve structure 5 may also have at least one fixing surface 53, which is perpendicular to the first assembly surface 51 and the connecting surface 52 respectively, and the fixing surface 53 is connected to the inner wall of the limiting cavity 31 in the end plate 3 by threaded connection or riveting.

[0055] Based on the above-mentioned embodiments of the present application, the connection between the rigid sleeve structure 5 and the end plate 3 is strengthened by threaded connection or riveting, and since the fixing surface 53 is perpendicular to the first assembly surface 51 and the connecting surface 52, the setting of threaded connection or riveting will not affect the connection between the rigid sleeve structure 5 and the connecting member 6, nor will it affect the surface contact between the rigid sleeve structure 5 and the end plate 3.

[0056] Specifically, in the present application, in order to set the above-mentioned first assembly surface 51, connection surface 52 and fixing surface 53 and other structures, the rigid sleeve structure 5 can be set to any suitable structural structure. For example, the rigid sleeve structure 5 can be set as a solid structure as a whole, and the rigid sleeve structure 5 can be set as a solid cubic structure, and the limiting cavity 31 can be set as a cubic structure cavity compatible with the rigid sleeve structure 5. At this time, the side walls of the rigid sleeve structure 5 are respectively abutted against the inner walls of the limiting cavity 31 to complete the fixation. By setting the rigid sleeve structure 5 as a solid structure, the strength of the rigid sleeve structure 5 itself is higher, and the overall strength of the connection position between the end plate 3 and the side cold plate 2 is higher. At this time, when the connecting member 6 is set as a bolt 61, a threaded hole can be directly opened on the rigid sleeve structure 5 to connect with the bolt 61.

[0057] Or, refer to Figure 8 As shown in , in an exemplary embodiment provided in the present application, the rigid sleeve structure 5 can also be set as a hollow structure, and the hollow structure can be formed by bending a steel plate. In specific use, a whole piece of high-strength steel plate can be cut and processed, and then a chair-shaped rigid sleeve structure 5 is formed by bending. At this time, the limiting cavity 31 can also be set as a cavity with a cubic structure, and the two first assembly surfaces 51 of the rigid sleeve structure 5 abut against the inner wall of the limiting cavity 31. At this time, when the connecting member 6 is set as a bolt 61, a connecting nut 54 can be fixed on the connecting surface 52 by welding or the like, thereby realizing the connection and fixation with the bolt 61.

[0058] Furthermore, when the rigid sleeve structure 5 is set in the limiting cavity 31 and connected to the end plate 3 by threaded connection or riveting, the fixing surface 53 and the inner wall of the limiting cavity 31 can also be fixed by adhesive, thereby further strengthening the connection strength between the two.

[0059] In addition, it should be noted that the material of the rigid casing structure 5 of the present application is not limited to steel structures. In the case of meeting the strength requirements, the rigid casing structure 5 can be made of metal materials, such as copper alloy, aluminum alloy, and other alloy materials. Alternatively, the rigid casing structure 5 can be made of non-metallic materials, such as ceramics and fiber composite materials, and the present application does not impose specific restrictions on this.

[0060] In this application, in order to ensure the strength of the connection between the side cold plate 2 and the end plate 3, the side cold plate 2 can be reinforced. Figure 9 As shown in , in an exemplary embodiment provided in the present application, a reinforcing sleeve 21 is embedded in the side cold plate 2 , and the reinforcing sleeve 21 is welded and fixed to the side cold plate 2 , and the connecting piece 6 passes through the reinforcing sleeve 21 and is fixed to the rigid sleeve structure 5 .

[0061] Based on the above-mentioned embodiments of the present application, since a flow channel 24 is formed in the side cold plate 2, on the one hand, in order to reduce the impact on the flow and sealing effect of the flow channel 24, and on the other hand, in order to strengthen the strength of the connection position, a reinforcing sleeve 21 is provided on the side cold plate 2, and the reinforcing sleeve 21 is welded and fixed to the side cold plate 2, which on the one hand enhances the strength of the connection position, and on the other hand avoids affecting the sealing effect of the flow channel 24.

[0062] Specifically, the side cold plate 2 is typically a thin-walled structure to form the flow channel 24. If the connector 6 is directly mounted on the side cold plate 2, the connector 6 would easily flatten the side cold plate 2 when subjected to force along its length, causing deformation in the thickness direction of the side cold plate 2. The reinforcement sleeve 21, however, not only enhances the side cold plate 2's resistance to deformation in the thickness direction, but also strengthens the welded connection between the sleeve 21 and the side cold plate 2, ensuring a connection without compromising the sealing of the flow channel 24.

[0063] Furthermore, in order to further reduce the impact of the reinforcing sleeve 21 on the sealing effect of the flow channel 24 in the side cold plate 2, a groove can be opened at the welding surface position of the reinforcing sleeve 21 and the side cold plate 2 to form a wedge-shaped welding structure after welding, thereby enhancing the strength of the connection position while improving the sealing effect.

[0064] In addition, an adhesive structure may be provided on the side of the side cold plate 2 facing the battery cell 1 to strengthen the connection between the side cold plate 2 and the battery cell 1. In specific use, the adhesive structure may be provided as a thermally conductive structural adhesive or the like.

[0065] refer to Figure 2 and Figure 3 As shown in , in some embodiments of the present application, the ultra-long battery module may further include at least one intermediate buffer plate 7, which is located between the two end plates 3, and the intermediate buffer plate 7 is fixed to the side cold plate 2 through a connector 6.

[0066] Based on the above-mentioned embodiments of the present application, an intermediate buffer plate 7 is provided. At this time, the intermediate buffer plate 7 can, on the one hand, play a reinforcing role, thereby making the overall strength of the ultra-long battery module higher. On the other hand, it can also play a buffering role, thereby realizing the connection and fixation between the two groups of battery cells 1 on both sides, thereby adapting to the strength requirements of the ultra-long battery module and ensuring that the middle part of the ultra-long battery module is evenly stressed.

[0067] Specifically, refer to Figure 5 As shown in FIG, since the intermediate buffer plate 7 is positioned in the middle of the extra-long battery module, it primarily serves to strengthen and cushion the battery. Battery cells 1 are positioned on both sides of the intermediate buffer plate 7, so the forces acting on both sides of the intermediate buffer plate 7 are relatively even, and the shear forces acting on the intermediate buffer plate 7 and its connecting structure are relatively low. In this case, reinforcing structures such as the limiting cavity 31 and the rigid sleeve structure 5 can be omitted from the intermediate buffer plate 7. For example, threaded holes can be directly provided at the ends of the intermediate buffer plate 7 for threaded connection with the connecting member 6 provided as a bolt 61. The specific configuration can be determined based on the actual connection strength requirements, and this application does not impose any specific restrictions thereon.

[0068] refer to Figure 2 and Figure 3 As shown in , at least one of the intermediate buffer plates 7 cooperates with the end plates 3 and the side cold plates 2 to form at least two accommodating sub-cavities, and the battery cells 1 are arranged in the accommodating sub-cavities.

[0069] Based on the above-mentioned embodiments of the present application, through the provision of the intermediate buffer plate 7, the accommodating sub-cavity formed by the intermediate buffer plate 7 can better support and protect the battery cell 1 while accommodating the battery cell 1.

[0070] Specifically, the intermediate buffer plates 7 can be set to any appropriate number. For example, when the intermediate buffer plates 7 are set to one, two, three or even more, the two end plates 3 are also set at the ends to clamp and fix the battery cell 1 as a whole, and the intermediate buffer plates 7 are set at equal intervals in the middle for reinforcement and buffering. The specific number of intermediate buffer plates 7 can be set according to factors such as the length of the ultra-long battery module and the size of the battery cell 1, and this application does not impose specific restrictions on this.

[0071] In addition, it should be noted that the above configuration of the present application does not impose any specific restrictions on the specific structure of the end plate 3. Figure 6 and Figure 7As shown in , in an exemplary embodiment provided by the present application, the end plate 3 can be configured as a cavity structure, with a limiting cavity 31 provided at the end of the end plate 3, and an opening provided in the limiting cavity 31 in the width direction of the end plate 3, thereby facilitating the placement of the rigid sleeve structure 5 into the limiting cavity 31. At the same time, a waist-shaped hole or a U-shaped hole is further provided at the end of the end plate 3 facing the side cold plate 2, and the waist-shaped hole or the U-shaped hole is connected to the limiting cavity 31, thereby facilitating the insertion of the connector 6 into the end plate 3.

[0072] In the above configuration of the present application, since the side cold plates 2 are separated from each other, in order to ensure the connectivity of the flow channels 24 between the side cold plates 2 and avoid setting multiple water nozzle joints to affect the volume of the battery pack, reference is made to FIG. Figure 2 As shown in , in an exemplary embodiment provided in the present application, any two adjacent side cold plates 2 can be connected through a connecting pipe 22, and two connecting pipes 22 can be set between any two adjacent side cold plates 2, respectively used for the inflow and outflow of coolant, and then water pipes are respectively set to connect the connecting pipes 22 with the water inlet and outlet water nozzle joints.

[0073] Based on the above technical solution, according to the second aspect of the present application, a battery pack is further provided, comprising a frame, at least one longitudinal beam, and at least two of the aforementioned extra-long battery modules. The longitudinal beam is disposed within the frame and fixedly connected to the frame. The extra-long battery module is positioned between the longitudinal beam and the frame, and each side of the extra-long battery module is fixedly connected to the longitudinal beam and the frame, respectively. Alternatively, both sides of the extra-long battery module are fixedly connected to the longitudinal beam.

[0074] Based on the above-mentioned embodiments of the present application, a battery pack is formed by grouping multiple extra-long battery modules in a frame 7. The above-mentioned extra-long battery modules are based on the above-mentioned arrangement of the present application, and the connection strength between the side cold plate 2 and the end plate 3 for fixing the battery cell 1 in the extra-long battery module is relatively high, thereby making the overall strength of the battery pack relatively high.

[0075] Furthermore, after the extra-long battery module provided by the present application is applied to the above-mentioned battery pack, the extra-long battery module is arranged as a whole along the length direction of the battery pack, and the intermediate buffer plate 7 structure located in the extra-long battery module can play a role similar to a crossbeam. Therefore, the crossbeam structure can be omitted, and only a longitudinal beam is set for connecting adjacent extra-long battery modules, thereby ensuring the overall strength and connection strength of the battery pack while improving the overall integration of the battery pack.

[0076] In addition, it should be noted that the battery pack provided in this application may also include other structural elements, such as a bottom guard plate, etc., which can be selected according to the specific design requirements of the battery pack.

[0077] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.

[0078] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0079] In addition, the various implementation methods of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. An ultra-long battery module, characterized in that: The ultra-long battery module includes: Multiple battery cells; Two side cold plates and two end plates, the side cold plates and the end plates are alternately connected to form an accommodation space, and the accommodation space is used to accommodate the battery cells; a connecting piece, passing through the side cold plate and connected to the end plate to fix the side cold plate to the end plate; A limiting cavity is provided in the end portion of the end plate close to the side cold plate, a rigid sleeve structure is provided in the limiting cavity, and the rigid sleeve structure contacts the inner wall surface of the limiting cavity; The connecting piece passes through the side cold plate and is connected to the rigid sleeve structure in the limiting cavity. After the connecting piece is fixed to the rigid sleeve structure, the side cold plate and the end plate are relatively fixed.

2. The ultra-long battery module according to claim 1, characterized in that: The rigid sleeve structure has two first assembly surfaces and at least one connecting surface, wherein the connecting surface is perpendicular to the first assembly surface, the first assembly surface abuts against the inner wall of the limiting cavity in the first direction, and the connecting member is fixed to the connecting surface; The first direction corresponds to the thickness direction of the end plate.

3. The ultra-long battery module according to claim 2, characterized in that: The connecting member is configured as a bolt, a connecting nut is fixedly provided on the connecting surface, and the bolt is threadedly connected to the connecting nut.

4. The ultra-long battery module according to claim 2, characterized in that: The rigid sleeve structure further has at least one fixing surface, which is perpendicular to the first assembly surface and the connecting surface respectively, and is connected to the inner wall of the limiting cavity in the end plate by threaded connection or riveting.

5. The ultra-long battery module according to claim 4, characterized in that: The fixing surface is bonded and fixed to the inner wall of the limiting cavity.

6. The ultra-long battery module according to claim 1, characterized in that: A reinforcing sleeve is embedded in the side cold plate, the reinforcing sleeve is welded and fixed to the side cold plate, and the connecting piece passes through the reinforcing sleeve and is fixed to the rigid sleeve structure.

7. The ultra-long battery module according to claim 6, characterized in that: A bonding structure is provided on a side of the side cold plate facing the battery core.

8. The ultra-long battery module according to any one of claims 1 to 7, characterized in that: The super-long battery module further includes at least one intermediate buffer plate, which is located between the two end plates and is fixed to the side cold plates via the connector.

9. The ultra-long battery module according to claim 8, characterized in that: At least one of the intermediate buffer plates cooperates with the end plates and the side cold plates to form at least two accommodating sub-cavities, and the battery cells are arranged in the accommodating sub-cavities.

10. A battery pack, characterized in that: The battery pack includes: frame; at least one longitudinal beam, the longitudinal beam being disposed within the frame and fixedly connected to the frame; and At least two extra-long battery modules according to any one of claims 1 to 9, wherein the extra-long battery modules are located between the longitudinal beam and the frame, and both sides of the extra-long battery modules are fixedly connected to the longitudinal beam and the frame respectively; or, both sides of the extra-long battery modules are fixedly connected to the longitudinal beam.

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