Association piece for composite module, composite module and battery pack

Abstract

The utility model discloses an association piece for a composite module, the composite module and a battery pack. The association piece for the composite module comprises a first direction plate, a second direction plate and partition ribs, the second direction plate is perpendicularly connected to the first direction plate and located on one length side of the first direction plate, and a step groove is formed between the first direction plate and the second direction plate. The separating rib is located in the step groove and located in the middle of the first direction plate in the length direction. Wherein the first direction plate and / or the second direction plate are / is provided with connecting holes for connecting and fixing. The first direction plate of the association piece for the composite module covers the thickness end surfaces of the end plates of the two adjacent battery modules, the second direction plate is limited on the large surfaces of the end plates of the two adjacent battery modules, and the separation ribs are located between the two adjacent battery modules, so that the battery modules are limited in three directions; unbalanced stress caused by the fact that a plurality of battery modules use the same steel belt is avoided, the stability of the whole composite module is improved, and the safety design of a battery system is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a related part for a composite module, a composite module and a battery pack. Background Art

[0002] The composite module in the prior art usually includes a plurality of battery modules, each of which is arranged in sequence. The battery modules are fixed by adding steel strips around the composite module to form an integral structure. A cooling plate is provided on the bottom plate of the battery pack, and the bottom of the battery module is bonded to the cooling plate by glue. During use, this method of fixing the battery module can effectively prevent the battery module from contacting the inner wall of the battery pack box and causing damage to the battery cell. However, this fixing method causes the composite module to be subjected to an inward squeezing force, causing uneven force on the battery cells inside the battery module. During long-term use, adjacent battery modules may move relative to each other, which may cause the glue at the bottom of the battery module to be loose and partially detached, so that the bottom of the battery cell cannot fully contact the cooling plate, resulting in thermal management failure of each battery cell, seriously affecting the stability of the battery module and not conducive to the safe design of the battery system.

[0003] Most of the composite modules in the prior art use a one-way fixing method to limit the composite modules. However, in actual working conditions, the battery module will be subjected to forces in three spatial directions. The single limiting method of the battery module does not meet the battery system's requirements for high safety.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to solve one of the above technical defects, the utility model provides an associated component for a composite module, a composite module and a battery pack.

[0006] This application provides the following technical solutions:

[0007] The first object of the present application is to provide an associated component for a composite module, comprising:

[0008] First direction plate;

[0009] a second direction plate, the second direction plate being perpendicularly connected to the first direction plate, the second direction plate being located on a length side of the first direction plate, and a step groove being formed between the first direction plate and the second direction plate;

[0010] A partition rib, the partition rib being located in the step groove and in the middle of the first direction plate along the length direction, and the partition rib being connected to the first direction plate and the second direction plate respectively;

[0011] Wherein, the first direction plate and / or the second direction plate are provided with connection holes for connection and fixation.

[0012] Optionally, the width of the second direction plate is smaller than that of the first direction plate;

[0013] Two connection holes are provided on the first direction plate, and the two connection holes are respectively provided on both sides of the partition rib.

[0014] Optionally, the partition rib extends along the width direction of the first direction plate, one end of the partition rib along the length direction is connected to the second direction plate, and one length side of the partition rib is connected to the first direction plate.

[0015] Optionally, a narrowed edge is provided on a side of the partition rib facing away from the first direction plate;

[0016] In the direction from the first direction plate to the narrowed edge, the width of the narrowed edge gradually decreases.

[0017] Optionally, a smooth outer surface is provided on the side of the partition rib facing away from the first direction plate.

[0018] Optionally, the first direction plate has two first side thickness end surfaces and a first positive thickness end surface connecting the two first side thickness end surfaces, and the first positive thickness end surface and the first side thickness end surface have a smooth transition;

[0019] The second direction plate has two second side thickness end surfaces and a second positive thickness end surface connecting the two second side thickness end surfaces, and the second positive thickness end surface and the second side thickness end surface have a smooth transition;

[0020] The two first side thickness end surfaces are respectively connected to the corresponding second side thickness end surfaces.

[0021] The second object of the present application is to provide a composite module, comprising:

[0022] At least two battery modules, each battery module is arranged in sequence;

[0023] Several composite module-use associated parts as described above, wherein the partition ribs of the associated parts are located between the end plates of two battery modules, the first direction plate is attached to the end plates of two adjacent battery modules, and the second direction plate is attached to the end plates of two adjacent battery modules;

[0024] One end of each of the two fasteners passes through the corresponding connection hole on the composite module associated part and is connected to the battery pack shell or the corresponding end plate, and the other end of the fastener is limited to the composite module associated part.

[0025] Optionally, the end plate has two large surfaces sequentially arranged along the thickness direction and a thickness end surface connecting the two large surfaces;

[0026] The first direction plate covers the thickness end surface of the end plates of two adjacent battery modules, and the second direction plate is attached to the large surface of the end plates of two adjacent battery modules;

[0027] A through hole is provided on the thickness end surface of the end plate;

[0028] One end of the fastener passes through the connection hole on the first direction plate and the through hole on the corresponding end plate in sequence and is connected to the shell of the battery pack, and the other end of the fastener is limited to the first direction plate.

[0029] Optionally, each of the battery modules is sheathed with a steel belt;

[0030] The partition ribs extend between the end plates of two adjacent battery modules, and the partition ribs and the steel strips are staggered.

[0031] A third object of the present application is to provide a battery pack, comprising:

[0032] a housing having a cavity;

[0033] As for the composite module mentioned above, the composite module is disposed in the cavity.

[0034] By adopting the above technical solution, this application has the following beneficial effects:

[0035] The composite module connecting parts of the present application are used to connect two adjacent battery modules in the composite module. The first direction plate covers the thickness end surface of the end plates of the two adjacent battery modules, and the second direction plate is limited to the large surface of the end plates of the two adjacent battery modules. The large surface is the side surface on both sides of the end plate along the thickness direction, that is, the side of the end plate facing away from the battery module. The partition rib is located between the two adjacent battery modules. The composite module connecting parts of the present application limit the battery modules in the composite module in three directions, fixing each battery module to each other, reducing the impact of battery pack shaking on the battery module during use, and avoiding the uneven force inside the battery module caused by the use of steel strips, thereby improving the stability of the entire composite module and facilitating the safe design of the battery system.

[0036] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0038] Figure 1 A schematic diagram of the partial structure of a battery module connected to an associated component for a composite module according to an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of associated components for a composite module provided in an embodiment of the present application;

[0040] Figure 3 A schematic diagram of a partial structure of a composite module provided in an embodiment of the present application without being connected to associated components for the composite module;

[0041] Figure 4 A schematic diagram of the partial structure of the composite module provided in an embodiment of the present application.

[0042] In the figure, the composite module includes an associated part 1, a first direction plate 11, a connecting hole 111, a first side thickness end face 112, a first positive thickness end face 113, a second direction plate 12, a second side thickness end face 121, a second positive thickness end face 122, a partition rib 13, a narrowed edge 131, a battery module 2, an end plate 21, a through hole 211, and a steel strip 22.

[0043] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0046] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0047] Example 1

[0048] See also Figures 1 to 4 As shown, the first embodiment of the present application provides an associated part 1 for a composite module, comprising: a first direction plate 11, a second direction plate 12 and a partition rib 13. The second direction plate 12 is vertically connected to the first direction plate 11, and the second direction plate 12 is located on a length side of the first direction plate 11, and a step groove is formed between the first direction plate 11 and the second direction plate 12. The partition rib 13 is located in the step groove, and the partition rib 13 is located in the middle of the first direction plate 11 along the length direction, and the partition rib 13 is connected to the first direction plate 11 and the second direction plate 12 respectively. Particularly, a connection hole 111 for connection and fixation is provided on the first direction plate 11 and / or the second direction plate 12.

[0049] The composite module connecting member 1 of the present application is used to connect two adjacent battery modules 2 in the composite module. The first direction plate 11 covers the thickness end surface of the end plates 21 of the two adjacent battery modules 2. The second direction plate 12 is limited to the large surface of the end plates 21 of the two adjacent battery modules 2. The large surface is the side surface of the end plates 21 along the thickness direction, that is, the side of the end plates 21 facing away from the battery modules 2. The partition rib 13 is located between the two adjacent battery modules 2. The composite module connecting member 1 of the present application limits the position of each battery module 2 in the composite module in three directions: the direction perpendicular to the bottom of the battery pack, the direction along which each battery module 2 is arranged, and the direction in which the battery module 2 extends. The battery modules 2 are fixed to each other in pairs, reducing the impact of battery pack shaking on the battery modules 2 during use. At the same time, it avoids the uneven force inside the battery modules 2 caused by the use of steel strips 22, improving the stability of the entire composite module and facilitating the safe design of the battery system.

[0050] The second directional plate 12 is narrower than the first directional plate 11. Two connection holes 111 are provided on the first directional plate 11, one on each side of the partition 13. The width of the first directional plate 11 is approximately the same as or slightly smaller than the thickness of the end plate 21. The first directional plate 11 does not protrude beyond the end surface of the end plate 21 toward the battery module 2, and its position does not interfere with the internal structure of the battery module 2. The second directional plate 12 is located on the large surface of the end plate 21 facing away from the battery cells. The second directional plate 12 does not need to be large; it only needs to hold the battery module 2 in place. This reduces the size, weight, consumables, and cost of the composite module-related component 1 of the present application, and does not interfere with the arrangement of the steel strips 22 on each battery module 2. The connection holes 111 facilitate the insertion of fasteners for positional engagement or fixation with the end plate 21.

[0051] like Figure 2 As shown, the partition rib 13 extends along the width direction of the first directional plate 11, one end of the partition rib 13 along the length direction is connected to the second directional plate 12, and one longitudinal side of the partition rib 13 is connected to the first directional plate 11. The partition rib 13 is connected along one end and two directions of one longitudinal side in the length direction. The partition rib 13 is integrally formed with the first directional plate 11 and the second directional plate 12, providing good structural stability. The partition rib 13 can be connected to the first directional plate 11 and the second directional plate 12 by welding.

[0052] like Figure 2 As shown, the side of the rib 13 facing away from the first directional plate 11 is provided with a narrowing edge 131. The width of the narrowing edge 131 gradually decreases in the direction from the first directional plate 11 to the narrowing edge 131. The width of the narrowing edge 131 is smaller than the gap between the end plates 21 of two adjacent battery modules 2. When assembling the composite module-use connecting member 1 of the present application, the rib 13 can smoothly penetrate the gap along the narrowing edge 131.

[0053] In one possible embodiment, Figure 1 and Figure 2 As shown, the side of the rib 13 facing away from the first direction plate 11 is provided with a smooth outer surface. This ensures that the side of the rib 13 facing away from the first direction plate 11 has no sharp structures and will not rub against the end plate 21 of the battery module 2, leaving no scratches or damaging the end plate 21.

[0054] like Figure 2As shown, the first direction plate 11 has two first side thickness end surfaces 112 and a first positive thickness end surface 113 connecting the two first side thickness end surfaces 112, and the first positive thickness end surface 113 and the first side thickness end surface 112 have a smooth transition. The second direction plate 12 has two second side thickness end surfaces 121 and a second positive thickness end surface 122 connecting the two second side thickness end surfaces 121, and the second positive thickness end surface 122 and the second side thickness end surface 121 have a smooth transition. The two first side thickness end surfaces 112 are respectively connected to the corresponding second side thickness end surfaces 121. The surfaces of the first direction plate 11 and the second direction plate 12 are smooth and have no sharp structures, so that when installing the composite module associated part 1 of the present application, other structures of the battery module 2 will not be cut or scratched, and fingers will not be cut during manual assembly.

[0055] The associated parts 1 for the composite module of the present application can be made of stainless steel plates through sheet metal bending and welding processes. First, the stainless steel plates are bent into sheet metal to form the first direction plate 11 and the second direction plate 12, and then one length side of the partition rib 13 is welded to the first direction plate 11, and one end of the partition rib 13 along the length direction is welded to the second direction plate 12, which can improve the process accuracy. When in use, the two modules are connected by bolts, connected and fixed. The battery modules 2 are fixed to each other in pairs to reduce the impact of shaking on the battery module 2 during vehicle movement, avoid the situation where the steel belt 22 is used and the force imbalance inside the battery module 2 exists, and improve the stability of the entire composite module.

[0056] Example 2

[0057] like Figure 1 、 Figure 3 and Figure 4As shown, the second embodiment of the present application provides a composite module, comprising: at least two battery modules 2 and a number of composite module-use associated parts 1 as described above. The battery modules 2 are arranged in sequence. The partition ribs 13 of the associated parts are located between the end plates 21 of the two battery modules 2, the first direction plate 11 is attached to the end plates 21 of the two adjacent battery modules 2, and the second direction plate 12 is attached to the end plates 21 of the two adjacent battery modules 2. Two fasteners (not shown) respectively have one end passing through the corresponding connection holes 111 on the composite module-use associated parts 1 and are connected to the battery pack shell (not shown) or the corresponding end plate 21, and the other end of the fastener is limited to the composite module-use associated parts 1. The composite module of the present application uses an associated part 1 to limit each battery module 2 in the composite module in three directions, fixing each battery module 2 to each other, reducing the impact of the battery pack shaking on the battery module 2 during use, and avoiding the situation where the steel belt 22 is used and the internal force of the battery module 2 is unbalanced, thereby improving the stability of the entire composite module and facilitating the safe design of the battery system.

[0058] In one possible embodiment, Figure 3 As shown, the end plate 21 has two large surfaces arranged in sequence along the thickness direction and a thickness end surface connecting the two large surfaces. The first direction plate 11 covers the thickness end surface of the end plate 21 of the two adjacent battery modules 2, and the second direction plate 12 is attached to the large surface of the end plate 21 of the two adjacent battery modules 2. A through hole 211 is provided on the thickness end surface of the end plate 21. One end of the fastener passes through the connection hole 111 on the first direction plate 11 and the through hole 211 on the corresponding end plate 21 in sequence and is connected to the shell of the battery pack, and the other end of the fastener is limited to the first direction plate 11. The fastener can be a bolt, and a threaded hole is provided on the end plate 21 of the battery module 2. The screw of the bolt passes through the connection hole 111 and is threadedly connected to the threaded hole, and the nut of the bolt is limited to the first direction plate 11. Alternatively, a threaded hole is provided on the shell of the battery pack, and the screw of the bolt passes through the connecting hole 111 and the through hole 211 and is threadedly connected to the threaded hole on the shell, and the nut of the bolt is limited to the first direction plate 11. In this way, while fixing the composite module with the associated part 1, the battery module 2 is also fixed to the shell of the battery pack, which simplifies the assembly structure, makes the installation of the battery module easier, improves the assembly efficiency, and provides great convenience for subsequent maintenance work.

[0059] like Figure 3 and Figure 4As shown, each of the battery modules 2 is sleeved with a steel belt 22. In the prior art, the same steel belt 22 is sleeved on the periphery of all the battery modules 2 in the composite module, but this causes the composite module to be subjected to a greater extrusion force toward the inside, causing uneven force on each battery cell inside the battery module 2. The composite module of the present application is sleeved with a steel belt 22 on each of the battery modules 2, which reduces or eliminates the extrusion force between the battery modules 2, and the battery modules 2 are not easy to move relative to each other. The partition ribs 13 extend between the end plates 21 of two adjacent battery modules 2, and the partition ribs 13 and the steel belt 22 are staggered. The partition ribs 13 do not extend to the position of the steel belt 22, and the partition ribs 13 and the steel belt 22 are staggered, and the partition ribs 13 and the steel belt 22 do not interfere with each other.

[0060] Example 3

[0061] Embodiment 3 of the present application provides a battery pack, comprising: a shell and a composite module as described above. The shell has a cavity. The composite module is arranged in the cavity. The composite module of the battery pack of the present application uses a composite module connecting part 1 to limit each battery module 2 in the composite module in three directions, and fix each battery module 2 to each other in pairs, thereby reducing the impact of the battery pack of the present application shaking with the vehicle body on the battery module 2 during use. Each battery module of the battery pack of the present application uses an independent steel belt 22 to avoid each battery module being bound by the same steel belt 22, resulting in uneven force on each battery module 2, resulting in a large extrusion force between each other, thereby improving the stability of the entire composite module and facilitating the safe design of the battery system.

[0062] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A composite module related component, characterized in that: include: First direction plate; a second direction plate, the second direction plate being perpendicularly connected to the first direction plate, the second direction plate being located on a length side of the first direction plate, and a step groove being formed between the first direction plate and the second direction plate; A partition rib, the partition rib being located in the step groove and in the middle of the first direction plate along the length direction, and the partition rib being connected to the first direction plate and the second direction plate respectively; Wherein, the first direction plate and / or the second direction plate are provided with connection holes for connection and fixation.

2. The composite module-related component according to claim 1, wherein: The second direction plate has a width smaller than that of the first direction plate; Two connection holes are provided on the first direction plate, and the two connection holes are respectively provided on both sides of the partition rib.

3. The composite module-related component according to claim 2, wherein: The partition rib extends along the width direction of the first direction plate, one end of the partition rib along the length direction is connected to the second direction plate, and one length side of the partition rib is connected to the first direction plate.

4. The composite module-related component according to claim 3, wherein: The side of the partition rib facing away from the first direction plate is provided with a narrowed edge; In the direction from the first direction plate to the narrowed edge, the width of the narrowed edge gradually decreases.

5. The composite module-related component according to claim 4, characterized in that: A smooth outer surface is provided on a side of the partition rib facing away from the first direction plate.

6. The composite module-related component according to claim 1, wherein: The first direction plate has two first side thickness end surfaces and a first positive thickness end surface connecting the two first side thickness end surfaces, and the first positive thickness end surface and the first side thickness end surface have a smooth transition; The second direction plate has two second side thickness end surfaces and a second positive thickness end surface connecting the two second side thickness end surfaces, and the second positive thickness end surface and the second side thickness end surface have a smooth transition; The two first side thickness end surfaces are respectively connected to the corresponding second side thickness end surfaces.

7. A composite module, characterized in that: include: At least two battery modules, each battery module is arranged in sequence; The composite module connecting member according to any one of claims 1 to 6, wherein the partition rib of the connecting member is located between the end plates of two battery modules, the first direction plate is attached to the end plates of two adjacent battery modules, and the second direction plate is attached to the end plates of two adjacent battery modules; One end of each of the two fasteners passes through the corresponding connection hole on the composite module associated part and is connected to the battery pack shell or the corresponding end plate, and the other end of the fastener is limited to the composite module associated part.

8. The composite module according to claim 7, characterized in that: The end plate has two large surfaces sequentially arranged along the thickness direction and a thickness end surface connecting the two large surfaces; The first direction plate covers the thickness end surface of the end plates of two adjacent battery modules, and the second direction plate is attached to the large surface of the end plates of two adjacent battery modules; A through hole is provided on the thickness end surface of the end plate; One end of the fastener passes through the connection hole on the first direction plate and the through hole on the corresponding end plate in sequence and is connected to the shell of the battery pack, and the other end of the fastener is limited to the first direction plate.

9. The composite module according to claim 7, characterized in that: Each of the battery modules is sheathed with a steel belt; The partition ribs extend between the end plates of two adjacent battery modules, and the partition ribs and the steel strips are staggered.

10. A battery pack, characterized in that: include: a housing having a cavity; The composite module according to any one of claims 7 to 9, wherein the composite module is disposed in the cavity.

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