An integrated fixing structure for a battery module

Abstract

This application relates to an integrated fixing structure for a battery module, including a module frame, a cell body, and a pressure strip. The module frame is sleeved on the outside of the cell body. The pressure strip is disposed on the top of the cell body, and its two ends are respectively connected to the module frame. The cell body includes several stacked cell units. Several first through holes are provided on the bottom surface of the pressure strip near the cell body. Each first through hole corresponds to a cell unit, and the first through hole is located above the pressure relief valve of the corresponding cell unit. This application uses a module frame and pressure strip to assemble the battery module, which can effectively simplify the assembly process and improve assembly efficiency. With this structure, it is not necessary to use steel strips for fixing, nor is it necessary to use special tooling fixtures with cylinders to achieve assembly and fixing, which can greatly reduce material and labor costs.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an integrated fixing structure for a battery module. Background Technology

[0002] With the continuous increase in the proportion of fluctuating renewable energy sources such as photovoltaics and wind power in the grid capacity, energy storage systems, as key regulating devices, are particularly important for response speed and system stability. Existing commonly used energy storage battery module structures generally adopt the form of steel strip + end plates (aluminum end plates or sheet metal end plates). When installing the steel strip, these modules require specialized tooling fixtures with cylinders, making the assembly process complex. Moreover, due to the tolerances in the dimensions of the battery cells, this battery module has high requirements for the precision of the steel strip dimensions. In existing technologies, some battery module structures also use a form of battery cell housing + sheet metal end plates + sheet metal side plates + screws for assembly. This type of battery module has higher material costs and a more complex assembly process, making it difficult to meet the needs of practical applications. Utility Model Content

[0003] Based on this, the present invention provides an integrated fixing structure for battery modules, which aims to solve the problems of complex structural assembly processes, the need for a medium for assembly, high precision requirements for steel strip dimensions, and high material costs in existing battery module structures.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an integrated fixing structure for a battery module, comprising a module frame, a cell body, and a pressure strip; the module frame is sleeved on the outside of the cell body; the pressure strip is disposed on the top of the cell body, and both ends of the pressure strip are respectively connected to the module frame;

[0005] The battery cell body includes several stacked battery cell units; the pressure bar has several first through holes on its bottom surface near the battery cell body, each first through hole corresponding to a battery cell unit, and the first through hole is located above the pressure relief valve of the corresponding battery cell unit. By providing the first through holes, the excessive internal pressure of the battery cell during expansion can be prevented from causing electrolyte to spray out.

[0006] In a preferred embodiment, several battery cell units are stacked sequentially from one end of the module frame to the other; a PC sheet is disposed between adjacent battery cell units.

[0007] In a preferred embodiment, the cross-section of the pressure strip is U-shaped along the short side direction parallel to the module frame; an EVA foam layer is provided on the side of the bottom surface of the pressure strip near the battery cell body, and the EVA foam layer is adapted to the pressure strip.

[0008] In a preferred embodiment, the EVA foam layer is provided with a second through hole that is adapted to the first through hole, and the second through hole is provided in a one-to-one correspondence with the first through hole; the second through hole is provided between the first through hole and the pressure relief valve.

[0009] In a preferred embodiment, an array of wire harness fixing cable tie holes are provided on both sides of the pressure strip, and the array of wire harness fixing cable tie holes are equally spaced; each set of wire harness cable tie holes includes two independent cable tie holes.

[0010] In a preferred embodiment, two sets of fixed electrical board brackets are symmetrically arranged on the top of both sides of the pressure strip, and the two sets of fixed electrical board brackets are respectively arranged at both ends of the pressure strip.

[0011] In a preferred embodiment, the fixed electrical board bracket is a flanged bracket.

[0012] In a preferred embodiment, the pressure strip is provided with pressure strip fixing holes at both ends, and the pressure strip is connected to both ends of the module frame through the pressure strip fixing holes.

[0013] In a preferred embodiment, the module frame is provided with symmetrical perforated windows on both sides; a heating film is provided on the surface of the battery cell body near the perforated windows.

[0014] In a preferred embodiment, an epoxy board is provided between the module frame and the cell body, and the epoxy board is adapted to fit the module frame.

[0015] In a preferred embodiment, a first module fixing hole is provided on one end face of the module frame, and a second module fixing hole is provided on the other end face; the first module fixing hole and the second module fixing hole are on the same horizontal plane, and the first module fixing hole and the second module fixing hole are staggered. This arrangement can save corresponding space for the chassis and effectively improve the space utilization rate of the chassis.

[0016] In a preferred embodiment, the first module has two fixing holes, which are independently arranged; the second module has two fixing holes, which are independently arranged; and the two second module fixing holes are located between the two first module fixing holes.

[0017] In a preferred embodiment, the module frame is provided with lifting lugs on both sides near the pressure strip, and the two lifting lugs are arranged diagonally.

[0018] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This application simplifies the assembly process and improves assembly efficiency by using a module frame and pressure strip to assemble the battery module. The structure eliminates the need for steel strips for fixing, avoiding the assembly difficulties associated with the high-precision dimensional requirements of steel strips. It also eliminates the need for specialized tooling fixtures with cylinders, significantly reducing material and labor costs. The structure is simple and reliably fixed. Compared to similar products on the market, this structure greatly reduces production costs while ensuring product performance, offering a significant cost advantage, higher practicality and economy, and can be produced and used as a general-purpose product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the integrated fixing structure of the battery module according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 An exploded view of the integrated fixed structure of the battery module;

[0022] Figure 3 for Figure 1 A top view of the integrated fixed structure of the battery module;

[0023] Figure 4 for Figure 1 A schematic diagram of the integrated fixed structure of the battery module in the chassis.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] Specifically, such as Figures 1 to 4 As shown, the present invention proposes the following technical solution: an integrated fixing structure for a battery module, including a module frame 10, a cell body 20, and a pressure strip 30; the module frame 10 is sleeved on the outside of the cell body 20; the pressure strip 30 is disposed on the top of the cell body 20, and both ends of the pressure strip 30 are respectively connected to the module frame 10;

[0031] The battery cell body 20 includes several stacked battery cell units 21. The pressure strip 30 has several first through holes 31 on its bottom surface near the battery cell body 20. Each first through hole 31 corresponds to one of the battery cell units 21, and is positioned above the pressure relief valve 211 of the corresponding battery cell unit 21. By providing the first through holes 31, excessive internal pressure during battery cell unit expansion can be prevented from causing electrolyte leakage.

[0032] In a preferred embodiment, several battery cell units 21 are stacked sequentially from one end of the module frame 10 to the other end; a PC sheet 40 is disposed between adjacent battery cell units 21.

[0033] In a preferred embodiment, the cross-section of the pressure strip 30 is U-shaped along the direction parallel to the short side of the module frame 10; an EVA foam layer 50 is provided on the side of the bottom surface of the pressure strip 30 near the cell body 20, and the EVA foam layer 50 is adapted to the pressure strip 30.

[0034] In a preferred embodiment, the EVA foam layer 50 is provided with a second through hole (not marked in the figure) that is adapted to the first through hole 31, and the second through hole is provided in a one-to-one correspondence with the first through hole 31; the second through hole is provided between the first through hole 31 and the pressure relief valve 211.

[0035] In a preferred embodiment, an array of wire harness fixing cable tie holes 32 are provided on both sides of the pressure strip 30, and the array of wire harness fixing cable tie holes 32 are equally spaced; each array of wire harness cable tie holes 32 includes two independent cable tie holes 321.

[0036] In a preferred embodiment, two sets of fixed electrical board brackets 33 are symmetrically arranged on the top of both sides of the pressure strip 30, and the two sets of fixed electrical board brackets 33 are respectively arranged at both ends of the pressure strip 30.

[0037] In a preferred embodiment, the fixed electrical panel bracket 33 is a flanged bracket. This design facilitates the fixing and installation of electrical appliances while effectively saving space.

[0038] In a preferred embodiment, the pressure strip 30 has pressure strip fixing holes 34 at both ends, and the pressure strip 30 is connected to both ends of the module frame 10 through the pressure strip fixing holes 34. In this embodiment, the module frame 10 also has module frame fixing holes (not shown in the figure) at both ends that are adapted to the pressure strip fixing holes 34, and the pressure strip is fixedly connected to the module frame by means of nuts and the cooperation between the pressure strip fixing holes 34 and the module frame fixing holes.

[0039] In a preferred embodiment, the module frame 10 is provided with symmetrical perforated windows 11 on both sides; the surface of the battery cell body 20 near the perforated windows 11 is provided with a heating film (not shown in the figure).

[0040] In a preferred embodiment, an epoxy board 60 is provided between the module frame 10 and the cell body 20, and the epoxy board 60 is adapted to the module frame 10.

[0041] In a preferred embodiment, a first module fixing hole 12 is provided on one end face of the module frame 10, and a second module fixing hole 13 is provided on the other end face; the first module fixing hole 12 and the second module fixing hole 13 are on the same horizontal plane, and the first module fixing hole 12 and the second module fixing hole 13 are staggered. Figure 4 As shown, with this configuration, when two or more fixing structures are placed in the chassis 100 at the same time, in two adjacent fixing structures that are one in front of the other, the first module fixing hole 12 of one fixing structure can be staggered with the second module fixing hole 13 of the other fixing module, and the second module fixing hole 13 of the other fixing module is located between the first module fixing holes 12 of one fixing structure, which can save corresponding space for the chassis and effectively improve the space utilization of the chassis.

[0042] In a preferred embodiment, there are two first module fixing holes 12, which are independently arranged; there are two second module fixing holes 13, which are independently arranged; and the two second module fixing holes 13 are disposed between the two first module fixing holes 12.

[0043] In a preferred embodiment, each side of the module frame 10 near the pressure strip 30 is provided with a lifting lug 14, and the two lifting lugs 14 are arranged diagonally.

[0044] This application simplifies the battery module assembly process and improves assembly efficiency by using a module frame and pressure strips for assembly. The structure eliminates the need for steel strips for fixation, avoiding the assembly difficulties associated with the high-precision dimensional requirements of steel strips. It also eliminates the need for specialized tooling fixtures with cylinders, significantly reducing material and labor costs. The structure is simple and reliably fixed. Compared to similar products on the market, this structure greatly reduces production costs while maintaining product performance, offering a significant cost advantage, higher practicality and economy, and can be used as a general-purpose product.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An integrated fixing structure for a battery module, characterized in that, It includes a module frame, a cell body, and a pressure strip; the module frame is sleeved on the outside of the cell body; the pressure strip is disposed on the top of the cell body, and both ends of the pressure strip are respectively connected to the module frame; The battery cell body includes several stacked battery cell units; the pressure bar has several first through holes on its bottom surface near the battery cell body, each of the first through holes corresponding to a battery cell unit, and the first through holes are located above the pressure relief valve of the corresponding battery cell unit.

2. The integrated fixing structure of the battery module according to claim 1, characterized in that, From one end of the module frame to the other, several battery cell units are stacked sequentially; PC sheets are disposed between adjacent battery cell units.

3. The integrated fixing structure of the battery module according to claim 1, characterized in that, Along the short side direction parallel to the module frame, the cross-section of the pressure strip is U-shaped; an EVA foam layer is provided on the side of the bottom surface of the pressure strip near the battery cell body, and the EVA foam layer is adapted to the pressure strip.

4. The integrated fixing structure of the battery module according to claim 3, characterized in that, The EVA foam layer is provided with a second through hole that is adapted to the first through hole, and the second through hole is provided in a one-to-one correspondence with the first through hole; the second through hole is provided between the first through hole and the pressure relief valve.

5. The integrated fixing structure of the battery module according to claim 1, characterized in that, The pressure strip has a set of wire harness fixing cable tie holes on both sides, and the set of wire harness fixing cable tie holes are evenly spaced; each set of wire harness fixing cable tie holes includes two independent cable tie holes.

6. The integrated fixing structure of the battery module according to claim 1, characterized in that, Two sets of fixed electrical board brackets are symmetrically arranged on the top of both sides of the pressure strip, and the two sets of fixed electrical board brackets are respectively arranged at both ends of the pressure strip; the fixed electrical board brackets are flange brackets. The pressure strip has a pressure strip fixing hole at each end, and the pressure strip is connected to both ends of the module frame through the pressure strip fixing hole.

7. The integrated fixing structure of the battery module according to claim 1, characterized in that, The module frame has symmetrically arranged perforated windows on both sides; a heating film is provided on the surface of the battery cell body near the perforated windows.

8. The integrated fixing structure of the battery module according to claim 1, characterized in that, An epoxy board is provided between the module frame and the cell body, and the epoxy board is adapted to fit the module frame.

9. The integrated fixing structure of the battery module according to claim 1, characterized in that, A first module fixing hole is provided on one end face of the module frame, and a second module fixing hole is provided on the other end face; the first module fixing hole and the second module fixing hole are on the same horizontal plane, and the first module fixing hole and the second module fixing hole are staggered.

10. The integrated fixing structure of the battery module according to claim 9, characterized in that, The first module has two mounting holes, which are independently arranged; the second module has two mounting holes, which are independently arranged; and the two second module mounting holes are located between the two first module mounting holes. The module frame has two lifting lugs on its two sides near the pressure strip, and the two lifting lugs are arranged diagonally.

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