Connecting piece between modules, module integrated structure and battery pack

Abstract

The utility model discloses a connecting piece between modules, a module integrated structure and a battery pack, the connecting piece comprises a substrate, two ends of the substrate are respectively provided with a first mounting hole and a second mounting hole which are different in aperture, one end of the substrate with smaller aperture is downwards provided with a first folding edge, and the front side end of the substrate is downwards provided with a second folding edge. The module integrated structure is composed of a plurality of battery cell modules and a plurality of connecting sheets. The battery pack is formed by packaging one or more module integrated structures. According to the utility model, module end plate tolerance, in-box tolerance and the like in the installation process are effectively absorbed, and the error-tolerant rate in the installation process is increased.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a connecting piece between modules, a module integration structure, and a battery pack. Background Technology

[0002] Multiple battery cells are combined into a single module, and multiple modules are connected in series and parallel. Within the battery pack, modules are typically fixed to the internal crossbeams of the housing via end plates at both ends. To increase the overall strength of multiple parallel modules, brackets are added between the module end plates when fixing them in the housing. These brackets connect two modules, and fixing bolts pass through the brackets and the module end plates to secure the modules within the housing.

[0003] During the module installation process, the installation tooling used in the enclosure often causes a deviation between the module end plate and the enclosure mounting point. At the same time, the alignment of the module connecting piece and the module end plate during the mounting hole alignment process is also affected by the hole diameter tolerances of the module connecting piece and the module end plate.

[0004] Under the influence of multiple dimensions, when the mounting hole of the module connecting piece is too large, it will result in the pressing area of ​​the fixing bolt being too small, affecting the overall strength of the module; when the mounting hole is too small, it will also cause interference between the fixing bolt and the module connecting piece. During the installation process, friction will cause metal shavings to be generated on the module connecting piece, which will affect the cleanliness of the inside of the battery pack and require additional cleaning. Utility Model Content

[0005] The purpose of this utility model is to provide a connecting piece between modules, a module integration structure, and a battery pack, which effectively absorbs the tolerance of module end plate and box insertion during the installation process, and increases the fault tolerance of the installation process.

[0006] The technical solution adopted by this utility model to solve its technical problem is to propose a connecting piece between modules, including a substrate. The two ends of the substrate are respectively provided with a first mounting hole and a second mounting hole with different diameters. The substrate has a first folded edge downward at the end with the smaller hole diameter and a second folded edge downward at the front end.

[0007] The first mounting hole and the second mounting hole are used to fix two parallel battery cell modules, respectively.

[0008] Furthermore, the diameter of the first mounting hole is smaller than that of the second mounting hole, the first mounting hole is located at the left end of the substrate, and the first folded edge is located at the left end of the substrate.

[0009] Furthermore, a third fold is provided downward at the right end of the substrate, and the first fold is parallel to the third fold.

[0010] Further, the substrate is located between two parallel battery cell modules, the substrate, the first folded edge and the second folded edge are buckled on the fixing block of the end plate of one of the battery cell modules, so that the first mounting hole or the second mounting hole with a smaller aperture corresponds to the screw hole on the fixing block of the battery cell module; the substrate and the second folded edge are buckled on the fixing block of the end plate of the other battery cell module, so that the screw hole on the fixing block of the battery cell module is within the aperture range of the second mounting hole or the first mounting hole with a larger aperture.

[0011] Further, the first mounting hole is a circular hole, the second mounting hole is an elliptical hole, and the elliptical hole at least circumscribes the circular hole.

[0012] Further, the first mounting hole is a circular hole, the second mounting hole is a strip-shaped hole, and the length of the strip-shaped hole is greater than the diameter of the circular hole, and the width of the strip-shaped hole is at least the diameter of the circular hole.

[0013] Further, the lower folding widths of the first folded edge, the second folded edge and the third folded edge are the same.

[0014] Further, the lower folding widths of the first folded edge and the third folded edge are the same, and are smaller than the lower folding width of the second folded edge.

[0015] Based on the above-mentioned connecting sheet between modules, the utility model further proposes a module integrated structure, the module integrated structure is composed of a plurality of battery cell modules and a plurality of connecting sheets as mentioned above.

[0016] Based on the above-mentioned module integrated structure, the utility model further proposes a battery pack, and the battery pack is composed of one or more module integrated structures.

[0017] The utility model has the advantages of:

[0018] The connecting sheet between modules, the module integrated structure and the battery pack proposed by the utility model have the advantages that the connecting sheet has high rigidity, and different mounting hole sizes can effectively absorb installation size tolerance and increase installation process fault tolerance.

[0019] The first folded edge improves the connecting rigidity of the connecting sheet and the module, and can limit the position during installation, and cooperates with the second mounting hole to improve installation efficiency.

[0020] The second folded edge improves the rigidity of the connecting sheet, improves the extrusion resistance of the module assembly, and improves the overall strength of the module integrated structure and the battery pack. DRAWINGS

[0021] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In these drawings, like reference numerals are used to represent similar elements. The drawings in the following description are some embodiments of the present application, not all embodiments. For those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0022] Figure 1 A structure diagram of a connecting piece between modules of an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a module integrated structure.

[0024] In the figure: 1, base plate; 2, first folding edge; 3, second folding edge; 4, third folding edge; 5, module one; 6, module two; 7, cable tie; 8, end plate; 9, fixed block; 11, first mounting hole; 12, second mounting hole. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application and the prior art, the specific implementation of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can be obtained. In addition, the design direction is only to represent the relative position relationship between the components, not the absolute position relationship.

[0026] An embodiment of the present application provides a connecting piece between modules, please refer to Figure 1 , mainly including a base plate 1, the two ends of the base plate 1 are respectively provided with first mounting holes 11 and second mounting holes 12 with different hole diameters, and the base plate 1 is provided with a first folding edge 2 downward at one end with a smaller hole diameter and a second folding edge 3 downward at the front end.

[0027] In this application, the installation size tolerance is absorbed through two mounting holes with different hole diameters, and the first mounting hole 11 is taken as the mounting hole with smaller hole diameter and the second mounting hole 12 is taken as the mounting hole with larger hole diameter as an example for description.

[0028] In the specific implementation, the hole diameter of the first mounting hole 11 can be a standard size, and the hole diameter of the second mounting hole 12 is designed to be larger. During installation, the first mounting hole 11 is used as a reference, and the second mounting hole 12 can move within a certain range, so that the two adjacent battery cell modules are fixedly connected.

[0029] Exemplarily, the first mounting hole 11 can be located at the left end of the substrate 1, and the first folded edge 2 is also located at the left end of the substrate 1; the second mounting hole 12 is located at the right end of the substrate 1, and a third folded edge 4 can also be provided at the right side of the substrate 1. The first folded edge 2, the second folded edge 3, and the third folded edge 4 are all bent downward, as shown in FIG. 6. Figure 1

[0030] Preferably, the first folded edge 2 and the third folded edge 4 are parallel to each other, so as to facilitate the buckling and limiting between the connecting piece and the battery cell module.

[0031] In a specific embodiment, the substrate 1 is located between two parallel battery cell modules. The substrate 1, the first folded edge 2, and the second folded edge 3 are buckled on the fixing block 9 of the end plate 8 of one of the battery cell modules, so that the first mounting hole 11 or the second mounting hole 12 with a smaller aperture corresponds to the screw hole on the fixing block 9 of the battery cell module; the substrate 1 and the second folded edge 3 are buckled on the fixing block 9 of the end plate 8 of the other battery cell module, so that the screw hole on the fixing block 9 of the battery cell module is within the aperture range of the second mounting hole 12 or the first mounting hole 11 with a larger aperture.

[0032] Exemplarily, the two battery cell modules can be module one 5 and module two 6, respectively. Each module includes a plurality of battery cells. The plurality of battery cells are arranged in parallel, and foam is arranged between the battery cells. The end plate 8 of the module is arranged at both ends of the module. The end plate 8 and the battery cells are fixed by the foam adhesive. The plurality of battery cells and the end plate are bound by the cable tie 7, so as to form the battery cell module. The module one 5 and the module two 6 are arranged in parallel. The connecting piece is buckled between the end plates 8 of the two modules from the outside and is located above the end plates 8, as shown in FIG. 7. Figure 2

[0033] The specific connection mode of the connecting piece between the module one 5 and the module two 6 can be as follows:

[0034] The left end of the substrate 1 is buckled with the fixing block 9 on the right side of the end plate 8 of the module one 5. The first mounting hole 11 is aligned with the screw hole on the fixing block 9, and can be directly fixed by a screw / bolt. The right end of the substrate 1 is buckled with the fixing block 9 on the left side of the end plate 8 of the module two 6. The screw hole on the fixing block 9 is within the aperture range of the second mounting hole 12, and can be fixed by a screw / bolt.

[0035] When fixing the connecting piece, the first folded edge 2 and the second folded edge 3 can be buckled with the fixing block 9 on the right side of the end plate 8 of the module one 5 and fixed first. Then, the fixing between the second mounting hole 12 and the fixing block 9 of the module two 6 is adapted, so as to absorb the installation size tolerance and improve the fault tolerance. Each time of installation can be fixed by the smaller mounting hole of one end, and then the other end of the mounting hole is adapted and fixed, so as to improve the installation efficiency.

[0036] ​​In order to distinguish the first mounting hole 11 from the second mounting hole 12, the two mounting holes can be designed in different forms, so that the staff can intuitively determine which end of the mounting hole should be installed after receiving the connecting piece.

[0037] In a feasible embodiment, the first mounting hole 11 is a circular hole, and the second mounting hole 12 is an elliptical hole, and the elliptical hole at least circumscribes the circular hole. Under the condition of the substrate 1, the fault tolerance range of the second mounting hole 12 is moderately improved, and the improvement of the fault tolerance range can be in the direction along the direction of the connecting piece, or in the direction perpendicular to the direction of the connecting piece.

[0038] In another feasible embodiment, the first mounting hole 11 is a circular hole, and the second mounting hole 12 is a strip-shaped hole, and the length of the strip-shaped hole is greater than the diameter of the circular hole, and the width of the strip-shaped hole is at least the diameter of the circular hole. Under the condition of the substrate 1, the fault tolerance range of the second mounting hole 12 is moderately improved, and the improvement of the fault tolerance range can be in the direction along the direction of the connecting piece, or in the direction perpendicular to the direction of the connecting piece.

[0039] In this application, the first fold 2 and the fixed block 9 should be in abutting state, and the second fold 3 and the third fold 4 and the fixed block 9 are not necessarily in abutting state, wherein the second fold 3 can adjust the size of the substrate 1 to fit with the fixed block 9 according to the actual demand; whether the third fold 4 abuts with the fixed block 9 is based on the installation size tolerance of each time.

[0040] Based on the specific use case, the maximum width of the first fold 2 and the third fold 4 is the height of the fixed block 9, and the second fold 3 is not limited by the height of the fixed block 9.

[0041] In order to strengthen the rigidity of the connecting piece, the width of the second fold 3 can be designed to be larger, and the maximum size of the width of the first fold 2 and the third fold 4 is limited.

[0042] Based on this, in a feasible embodiment, the width of the first fold 2, the second fold 3 and the third fold 4 is the same.

[0043] In another feasible embodiment, the width of the first fold 2 and the third fold 4 is the same, and is smaller than the width of the second fold 3. The second fold 3 does not interfere with the strap 7.

[0044] Of course, the width of the first fold 2 and the third fold 4 can also be different, but should not exceed the height of the fixed block 9, so as to be able to stably buckle on the adjacent fixed blocks 9 of the two parallel battery modules.

[0045] The utility model also proposes a kind of module integrated structure, and module integrated structure is formed by multiple electric core module, multiple above-mentioned connecting piece, and integrated module structure can include multiple electric core module, and there is a connecting piece between two electric core modules in parallel and fixedly connected, such as Figure 2 As shown in the middle.

[0046] When module integrated structure includes only one electric core module, connecting piece is not needed to be used to connect and fix between modules, but still can use above-mentioned connecting piece to fix electric core module and shell structure.

[0047] Exemplarily, the first mounting hole 11 of connecting piece is fixed with the fixed block 9 on end plate 8, and the second mounting hole 12 can be fixed with shell structure, and vice versa.

[0048] The utility model also proposes a kind of battery pack, and battery pack is formed by one or more above-mentioned module integrated structure and is encapsulated.

[0049] When one module integrated structure is included in battery pack, it can be directly encapsulated, and when multiple module integrated structures are included in battery pack, multiple module integrated structures can be fixed first and then encapsulated.

[0050] It should be noted that, in this paper, such as first and second relationship terms, only to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply any such actual relationship or order between entities or operations.And, the term "include", "contain" or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or equipment containing a series of elements includes not only those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment.In the absence of more restrictions, the element limited by the sentence "including one" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0051] The above content is further detailed description of the utility model in conjunction with specific preferred embodiments, and the specific embodiments of the utility model cannot be limited to these descriptions.For ordinary skilled person in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the utility model.

Claims

1. An inter-module connecting sheet, characterized by, The application relates to a connecting sheet for a module integrated structure of a battery pack, comprising a substrate (1), first mounting holes (11) and second mounting holes (12) with different hole diameters being respectively arranged at two ends of the substrate (1), a first folding edge (2) being arranged downward at the end with the smaller hole diameter of the substrate (1), and a second folding edge (3) being arranged downward at the front end of the substrate (1).

2. The inter-module connecting plate according to claim 1, wherein The hole diameter of the first mounting holes (11) is smaller than that of the second mounting holes (12), the first mounting holes (11) are arranged at the left end of the substrate (1), and the first folding edge (2) is arranged at the left end of the substrate (1).

3. The inter-module connecting plate according to claim 2, wherein A third folding edge (4) is arranged downward at the right end of the substrate (1), and the first folding edge (2) is parallel to the third folding edge (4).

4. The inter-module connecting plate according to claim 1, wherein The substrate (1) is arranged between two parallel cell modules, the substrate (1), the first folding edge (2) and the second folding edge (3) are buckled on the fixing block (9) of the end plate (8) of one of the cell modules, so that the first mounting holes (11) or the second mounting holes (12) with the smaller hole diameter correspond to the screw holes on the fixing block (9) of the cell module; the substrate (1) and the second folding edge (3) are buckled on the fixing block (9) of the end plate (8) of the other cell module, so that the screw holes on the fixing block (9) of the cell module are located in the hole diameter range of the second mounting holes (12) or the first mounting holes (11) with the larger hole diameter.

5. The inter-module connecting plate according to claim 2, wherein The first mounting holes (11) are circular holes, the second mounting holes (12) are elliptical holes, and the elliptical holes at least circumscribe the circular holes.

6. The inter-module connecting plate according to claim 2, wherein The first mounting holes (11) are circular holes, the second mounting holes (12) are strip-shaped holes, the length of the strip-shaped holes is greater than the diameter of the circular holes, and the width of the strip-shaped holes is at least the diameter of the circular holes.

7. The inter-module connecting plate according to claim 3, wherein The lower folding widths of the first folding edge (2), the second folding edge (3) and the third folding edge (4) are the same.

8. The inter-module connecting plate according to claim 3, wherein The lower folding width of the first folding edge (2) is the same as that of the third folding edge (4), and both are smaller than the lower folding width of the second folding edge (3).

9. A module integration structure, characterized by comprising: The module integrated structure is composed of a plurality of cell modules and a plurality of connecting sheets as claimed in claim 1.

10. A battery pack, characterized by, The battery pack is composed of one or more module integrated structures as claimed in claim 9.

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