Stacked battery assembly

Abstract

The utility model provides a kind of stacked battery module, including at least two stacked battery modules, each battery module includes battery body, the connecting shell fixed in the length direction one end of battery body, the end plate being arranged in the length direction other end of battery body, the upper end of connecting shell has the first plug interface and first limiting portion that protrude upwards, the upper end of end plate protrudes upwards and is equipped with end baffle, the lower end of connecting shell has the second plug interface that protrude downwards, when two battery modules are stacked, the bottom of the battery module in upper portion is resisted between the first limiting portion and end baffle of the battery module in lower portion along horizontal direction, the second plug interface of the battery module in upper portion is inserted with the first plug interface of the battery module in lower portion and cooperates.The stacked battery module of the utility model effectively limits the deviation and skew of up and down stacked battery module on horizontal plane, ensures the alignment accuracy in stacking process, and additional lateral stress problem does not appear.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and specifically to a stacked battery assembly. Background Technology

[0002] With the rapid development of electric vehicles, energy storage systems, and other fields, rechargeable battery packs, as their core power or energy storage units, are evolving towards higher energy density and higher integration. In order to accommodate more cells in a limited space, multiple battery modules are usually stacked to build battery packs.

[0003] In existing battery pack designs, a common approach is to stack battery modules vertically. To simplify the assembly process and improve production efficiency, blind-mating connectors are typically used to achieve electrical interconnection between the stacked battery modules. "Blind-mating" refers to the process where, during module mating, the male and female connectors automatically align and engage without the need for precise visual positioning, relying solely on a mechanical guiding structure.

[0004] However, existing stacking installation methods have significant technical drawbacks. Due to the substantial weight of the battery modules, simple positioning structures alone are insufficient for stable and precise guidance when stacking them vertically. During installation, the lower battery modules cannot provide effective lateral constraint to the upper modules, making relative misalignment or overall skewness between modules highly likely. This misalignment directly causes blind-mating connectors to experience additional lateral stress at the moment of mating, resulting in a stiff and difficult insertion / removal feel, impacting the customer's assembly experience. More seriously, it can cause bending, wear, or even breakage of the connector pins, posing safety risks such as connection failure and short circuits. Furthermore, collision damage to the connectors increases maintenance costs and reduces the reliability of the battery pack.

[0005] In view of this, it is necessary to improve the existing stacked battery assemblies to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a stacked battery assembly to solve the problem that in existing stacked batteries, misalignment during stacking leads to additional lateral stress on the blind-mating connector.

[0007] To achieve the above objectives, this utility model provides a stacked battery assembly, which includes at least two stacked battery modules. Each battery module includes a battery body, a connecting housing fixed to one end of the battery body along its length, and an end plate disposed at the other end of the battery body along its length. The upper end of the connecting housing has an upwardly protruding first insertion interface and a first limiting portion. The upper end of the end plate has an upwardly protruding end baffle. The lower end of the connecting housing has a downwardly protruding second insertion interface. When the two battery modules are stacked, the bottom of the upper battery module abuts against the first limiting portion and the end baffle of the lower battery module in a horizontal direction. The second insertion interface of the upper battery module is inserted into and engaged with the first insertion interface of the lower battery module.

[0008] As a further improvement of this utility model, the battery module also includes a second limiting part that protrudes downward from the bottom end of the connecting housing. When the two battery modules are stacked, the second limiting part of the upper battery module abuts against the first limiting part of the lower battery module.

[0009] As a further improvement of this utility model, the first limiting part is provided with a clearance hole, the second limiting part is provided with a connecting screw hole, and the stacked battery assembly also includes a connecting screw. When the upper and lower battery modules are stacked, the connecting screw passes through the clearance hole and the connecting screw hole to fix the upper and lower battery modules together.

[0010] As a further improvement of this utility model, each battery module has two first limiting parts and two second limiting parts, and the two first limiting parts and two limiting parts are spaced apart along the width direction.

[0011] As a further improvement of this utility model, the end baffle is provided with an upward-opening limiting notch, and the bottom of the end plate is provided with a limiting block. When the upper and lower battery modules are stacked, the limiting block of the upper battery module is received in the limiting notch of the lower battery module, and the limiting notch restricts the relative movement of the upper and lower battery modules in the width direction and the vertical direction.

[0012] As a further improvement of this utility model, the end baffle is provided with at least two lifting holes and at least one through hole, and the bottom of the end plate is provided with a fixing screw hole corresponding to the through hole. The stacked battery assembly also includes fixing screws. When the upper and lower battery modules are stacked, the fixing screws pass through the through hole and the fixing screw hole to fix the upper and lower battery modules.

[0013] As a further improvement of this utility model, the bottom of the end plate is provided with two positioning blocks spaced apart along the width direction. When the two battery modules are stacked, the end baffle of the lower battery module is held between the two positioning blocks of the upper battery module along the width direction.

[0014] As a further improvement of this utility model, both the end plate and the connecting shell are integrally formed die-cast parts.

[0015] As a further improvement of this utility model, the end plate is provided with a first lifting rod mounting hole, and the connecting housing is provided with a second lifting rod mounting hole.

[0016] As a further improvement of this utility model, both the end plate and the connecting shell are provided with reinforcing ribs.

[0017] The beneficial effects of this utility model are: the stacked battery assembly of this utility model forms a horizontal clamping constraint by connecting the first limiting part of the housing and the end baffle of the end plate, which effectively limits the offset and skew of the stacked battery modules on the horizontal plane, ensures the alignment accuracy during the stacking process, and avoids the problem of additional lateral stress. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a three-dimensional structural diagram of the stacked battery assembly of this utility model; Figure 2 This is a three-dimensional structural diagram of the stacked battery assembly of this utility model from another angle; Figure 3 This is an exploded structural diagram of the stacked battery assembly of this utility model; Figure 4 This is an exploded structural diagram of the stacked battery assembly of this utility model from another angle; Figure 5 This is a three-dimensional structural diagram of the battery module of the stacked battery assembly of this utility model; Figure 6 This is a three-dimensional structural diagram of the battery module of the stacked battery assembly of this utility model from another angle. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figures 1 to 6 As shown, the stacked battery assembly 100 of this utility model includes at least two stacked battery modules 1. In this embodiment, the stacking direction is vertical, and the number of stacked modules can be two, three, or more.

[0023] Each battery module 1 includes a battery body 11, a connecting housing 12 fixed to one end of the battery body 11 along its length, and an end plate 13 disposed at the other end of the battery body 11 along its length. The battery body 11 is the main energy storage unit, and the connecting housing 12 is fixed to the battery body 11 by a plurality of screws and is electrically connected to the battery body 11. The end plate 13 is also fixedly connected to the battery body 11 by screws.

[0024] The upper end of the connecting housing 12 has an upwardly protruding first insertion interface 121 and a first limiting part 122. The upper end of the end plate 13 has an upwardly protruding end baffle 131, and the lower end of the connecting housing 12 has a downwardly protruding second insertion interface 123.

[0025] When the two battery modules 1 are stacked, the bottom of the upper battery module 1 is held horizontally between the first limiting part 122 and the end baffle 131 of the lower battery module 1, and the second insertion interface 123 of the upper battery module 1 is inserted and engaged with the first insertion interface 121 of the lower battery module 1.

[0026] The first limiting part 122 of the connecting housing 12 and the end baffle 131 of the end plate 13 form a horizontal clamping constraint, which effectively limits the offset and skew of the stacked battery modules 1 on the horizontal plane, ensuring the alignment accuracy during the stacking process and preventing additional lateral stress. At the same time, the first and second insertion interfaces 121 and 123 of the upper and lower interlocking further guide the precise insertion on the basis of mechanical limiting, which significantly reduces the risk of collision, wear or PIN damage caused by misalignment of the blind connector. This not only improves the reliability and efficiency of the assembly process, but also enhances the stability and service life of the stacked battery assembly 100, thereby simplifying the assembly operation while ensuring the safety and connection reliability of the stacked battery assembly 100 for long-term use.

[0027] The battery module 1 also includes a second limiting part 124 that protrudes downward from the bottom end of the connecting housing 12. When the two battery modules 1 are stacked, the second limiting part 124 of the upper battery module 1 abuts against the first limiting part 122 of the lower battery module 1. The abutment between the first limiting part 122 and the second limiting part 124 is a surface-to-surface contact abutment.

[0028] By providing a downwardly protruding second limiting part 124 at the bottom of the connecting housing 12 of the upper battery module 1, it directly abuts against the first limiting part 122 of the lower battery module 1 during stacking. This not only greatly improves the stacking positioning accuracy and overall structural stability through the clear abutting contact point, effectively preventing horizontal offset and shaking, but also optimizes the force path, directly transferring some weight and impact force to the structural frame, significantly reducing the load on the blind-fit connector, and fundamentally avoiding the risk of its pins being damaged due to force.

[0029] Furthermore, the first limiting part 122 is provided with a clearance hole 1221, and the second limiting part 124 is provided with a connecting screw hole 1241. The stacked battery assembly 100 also includes a connecting screw 2. When the upper and lower battery modules 1 are stacked, the connecting screw 2 passes through the clearance hole 1221 and the connecting screw hole 1241 to fix the upper and lower battery modules 1 in place.

[0030] The clearance hole 1221 of the topmost battery module 1 can also be used as a lifting hole, thereby enabling the hoisting of the entire stacked battery assembly 100.

[0031] The connecting screw 2 passes through the clearance hole 1221 and the connecting screw hole 1241 to firmly lock the upper and lower battery modules 1. It provides a rigid connection on the basis of the original precise positioning, which greatly enhances the integrity and stability of the stacked structure and effectively resists vibration and impact. Secondly, the design realizes multiple uses of one hole. The clearance hole 1221 not only provides an installation channel for screws, but also can be used directly as a lifting hole when it is located at the top module, eliminating the need for a dedicated lifting structure, significantly simplifying the structural design and saving production costs and space.

[0032] Each battery module 1 has two first limiting portions 122 and two limiting portions 124, and the two first limiting portions 122 and two limiting portions 124 are spaced apart along the width direction. In other embodiments, more first limiting portions 122 and second limiting portions 124 may be provided, or a single first limiting portion 122 and a single limiting portion 124 may be provided to increase the width.

[0033] The end baffle 131 is provided with an upward-opening limiting notch 1311, and the bottom of the end plate 13 is provided with a limiting block 132. When the upper and lower battery modules 1 are stacked, the limiting block 132 of the upper battery module 1 is received in the limiting notch 1311 of the lower battery module 1. The limiting notch 1311 restricts the relative movement of the upper and lower battery modules 1 in the width direction and the vertical direction.

[0034] The engagement of the limiting notch 1311 and the limiting block 132 effectively restricts the relative movement of the stacked battery modules 1 along the width and vertical directions. This design, combined with the front-to-back positioning, achieves comprehensive constraint on all degrees of freedom of the battery module 1 in the horizontal plane and its vertical displacement, thereby greatly improving the overall rigidity and stability of the stacked structure. This mechanical interlocking mechanism effectively disperses vibration and impact stress, significantly reduces the risk of wear and damage to the blind-fit connector caused by micro-movements in various directions, and provides clear guidance and positioning feedback for the assembly process, simplifying operation and further ensuring the accuracy and reliability of large-scale stacking. It is one of the key designs for achieving fast, accurate, and safe stacking of battery modules 1.

[0035] The end baffle 131 has at least two lifting holes 1312 and at least one through hole. The lifting holes 1312, together with the clearance hole 1221, can be used to lift the stacked battery assembly 100.

[0036] The bottom of the end plate 13 is provided with a fixing screw hole 134 corresponding to the through hole. The stacked battery assembly also includes a fixing screw 3. When the upper and lower battery modules 1 are stacked, the fixing screw 3 passes through the through hole and the fixing screw hole 134 to fix the upper and lower battery modules 1.

[0037] Two positioning blocks 135 are spaced apart along the width direction at the bottom of the end plate 13. When the two battery modules 1 are stacked, the end baffle 131 of the lower battery module 1 is held between the two positioning blocks 135 of the upper battery module 1 along the width direction. The positioning blocks 135 have the same function as the limiting blocks 132, which is to prevent the battery modules 1 from moving relative to each other along the width direction. The two can be set separately or simultaneously.

[0038] Both the end plate 13 and the connecting shell 12 are integrally formed die-cast parts, with simple structure, convenient molding, and high strength.

[0039] The end plate 13 has a first lifting rod mounting hole 133. The connecting housing 12 has a second lifting rod mounting hole 125. In this embodiment, in addition to lifting the stacked battery assembly 100 by means of the lifting hole and the lifting hole 1312, the stacked battery assembly 100 can also be transported by inserting a lifting rod into the first lifting rod mounting hole 133 and the second lifting rod mounting hole 125.

[0040] Furthermore, there are two first lifting rod mounting holes 133, which are spaced apart on the end plate 13 along the width direction. The axial direction of the first lifting rod mounting holes 133 is the length direction of the battery module 1.

[0041] The connecting housing 12 has a transport block 126 extending outward from both ends along the width direction and along the length direction, and the second lifting rod mounting hole 125 is opened on the transport block 126.

[0042] In this embodiment, the stacked battery assembly 100 can be moved by either hoisting or using a lifting bar.

[0043] Both the end plate 13 and the connecting housing 12 are provided with reinforcing ribs 127. The reinforcing ribs 127 are toothed structures that protrude outward along the length direction. In addition to strengthening the structural strength of the end plate 13 and the connecting housing 12, the reinforcing ribs 127 also serve a decorative purpose, eliminating the need to redesign decorative panels on both sides and reducing production costs.

[0044] The stacked battery assembly 100 of this utility model forms a horizontal clamping constraint by connecting the first limiting part 122 of the housing 12 and the end baffle 131 of the end plate 13, which effectively limits the offset and tilt of the stacked battery modules 1 on the horizontal plane, ensuring the alignment accuracy during the stacking process and preventing additional lateral stress. By combining the abutting contact between the second limiting part 124 at the bottom of the housing and the lower module, and the engagement between the limiting notch 1311 on the end baffle 131 and the bottom limiting block 132 of the battery module 1, a multi-mechanical positioning system that can effectively constrain displacement in the front-back, left-right and up-down directions is formed, which fundamentally ensures the stacking alignment accuracy and prevents connector damage.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A stacked battery assembly, characterized in that: The stacked battery assembly includes at least two stacked battery modules. Each battery module includes a battery body, a connecting housing fixed to one end of the battery body along its length, and an end plate disposed at the other end of the battery body along its length. The upper end of the connecting housing has an upwardly protruding first insertion interface and a first limiting portion. The upper end of the end plate has an upwardly protruding end baffle. The lower end of the connecting housing has a downwardly protruding second insertion interface. When the two battery modules are stacked, the bottom of the upper battery module abuts against the first limiting portion and the end baffle of the lower battery module in a horizontal direction. The second insertion interface of the upper battery module is inserted into and engaged with the first insertion interface of the lower battery module.

2. The stacked battery assembly according to claim 1, characterized in that: The battery module also includes a second limiting part that protrudes downward from the bottom end of the connecting housing. When the two battery modules are stacked, the second limiting part of the upper battery module abuts against the first limiting part of the lower battery module.

3. The stacked battery assembly according to claim 2, characterized in that: The first limiting part is provided with a clearance hole, the second limiting part is provided with a connecting screw hole, and the stacked battery assembly also includes a connecting screw. When the upper and lower battery modules are stacked, the connecting screw passes through the clearance hole and the connecting screw hole to fix the upper and lower battery modules together.

4. The stacked battery assembly according to claim 2, characterized in that: Each battery module has two first limiting parts and two second limiting parts, and the two first limiting parts and two limiting parts are spaced apart along the width direction.

5. The stacked battery assembly according to claim 1, characterized in that: The end baffle is provided with an upward-opening limiting notch, and the bottom of the end plate is provided with a limiting block. When the two battery modules are stacked, the limiting block of the upper battery module is received in the limiting notch of the lower battery module. The limiting notch restricts the relative movement of the two battery modules in the width direction and the vertical direction.

6. The stacked battery assembly according to claim 1, characterized in that: The end plate has at least two lifting holes and at least one through hole. The bottom of the end plate has a fixing screw hole corresponding to the through hole. The stacked battery assembly also includes fixing screws. When the upper and lower battery modules are stacked, the fixing screws pass through the through hole and the fixing screw hole to fix the upper and lower battery modules.

7. The stacked battery assembly according to claim 1, characterized in that: The bottom of the end plate is provided with two positioning blocks spaced apart along the width direction. When the two battery modules are stacked, the end baffle of the lower battery module is held between the two positioning blocks of the upper battery module along the width direction.

8. The stacked battery assembly according to claim 1, characterized in that: Both the end plate and the connecting housing are integrally formed die-cast parts.

9. The stacked battery assembly according to claim 1, characterized in that: The end plate has a first lifting rod mounting hole, and the connecting housing has a second lifting rod mounting hole.

10. The stacked battery assembly according to claim 1, characterized in that: Both the end plate and the connecting housing are provided with reinforcing ribs.

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