Battery pack single steel belt fixing structure

Abstract

The utility model provides a single steel belt fixing structure for a battery pack, which comprises at least two battery cells and is characterized by further comprising two side plates and a binding belt, the battery cells are arranged between the two side plates, the binding belt is wound on the peripheral sides of the two side plates so as to contract and fix the battery cells, the binding belt is positioned in the middle line of the side plates, and the binding belt is arranged between the two side plates. The packaging efficiency of the battery pack is improved, and the safety of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a battery pack single steel band fixing structure. BACKGROUND

[0002] In the energy storage industry, the battery pack is generally composed of multiple battery groups, and the number of battery groups is generally determined by the output voltage of the battery pack. Each battery group contains at least two battery cells. In related technologies, two packing belts are usually used to bind the upper and lower ends of the battery cells, and multiple battery cells are fixedly connected and packed into a battery group. For the related technologies in the above, in the process of using double packing belts for the battery group, the upper and lower positions need to be aligned, the packing operation is relatively complex, the packing rate is low, and when one of the packing belts is not tightened, the upper and lower ends of the battery group are not balanced, which easily causes the single packing belt to fall off, resulting in the battery group to be turned on its side and affecting the safety of the battery group. Therefore, there are problems of low battery group packing efficiency and low safety. SUMMARY

[0003] The utility model aims at: provide a kind of battery pack single steel band fixing structure, to solve the problem of low battery group packing efficiency and low safety.

[0004] To achieve the above object, the utility model discloses a kind of battery pack single steel band fixing structure using the following technical solutions:

[0005] A kind of battery pack single steel band fixing structure, including at least 2 battery cells, further including side plate and binding belt, the side plate is provided with 2, multiple battery cells are arranged between two side plates, the binding belt is arranged around the side of two side plates to shrink and fix the battery cell, and the binding belt is located at the midline of the side plate.

[0006] As an optimization of a kind of battery pack single steel band fixing structure, the side of the side plate away from the battery cell is transversely provided with a limiting groove, and the side surface of the binding belt is clamped to the inner wall of the limiting groove.

[0007] As an optimization of a kind of battery pack single steel band fixing structure, the side edge of the side plate is provided with a limiting end plate, the limiting end plate extends along the side close to the battery cell, and the limiting end plate is perpendicular to the side plate.

[0008] As an optimization of a kind of battery pack single steel band fixing structure, further including temperature control integrated sheet, the temperature control integrated sheet is embedded between adjacent two battery cells, and the temperature control integrated sheet is electrically connected to battery management system.

[0009] As an optimization of a kind of battery pack single steel band fixing structure, the binding belt is a steel belt.

[0010] As an optimization of a single steel band fixing structure of a battery pack, the width of the binding band is 30mm-50mm.

[0011] Compared with the prior art, the utility model has the advantages that when assembling the battery pack, a plurality of battery cells can be fixed by using only one binding band, the structure is simple, the packing time is saved, the production efficiency is improved, meanwhile, the binding band provides a constraint force to the center line of the battery cell, the battery pack is more stable, side turning is avoided, and the safety of the battery pack is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0013] Figure 1 It is a whole structure schematic view of a single steel band fixing structure of a battery pack of the embodiment of the application.

[0014] Figure 2 It is an explosion structure schematic view of a single steel band fixing structure of a battery pack of the embodiment of the application.

[0015] In the drawing: 1, battery cell;2, side plate;3, binding band;4, limiting groove;5, limiting end plate;6, temperature control integrated sheet. DETAILED DESCRIPTION

[0016] In order to make the technical scheme and advantages of the utility model more clear, the utility model and its advantages will be further described in detail in combination with specific embodiments and the drawings of the specification, but the embodiment of the utility model is not limited to this.

[0017] In the description of the utility model, unless explicitly defined and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship of two elements.For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0018] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0019] In the related art, the energy storage battery device is usually provided with a plurality of battery packs, each of which is electrically connected to a battery management system (BMS), and each battery pack is generally composed of a plurality of battery groups, and the number of battery groups is generally determined by the output voltage of the battery pack, and each battery group contains at least two battery cells.

[0020] The following will be described in detail with reference to the accompanying drawings. Figures 1-2 The application provides a single steel band fixing structure for a battery group, which adopts the following technical scheme.

[0021] Referring to Figure 1 and Figure 2 , the fixing structure comprises at least two battery cells 1, side plates 2 and a binding belt 3. The side plates 2 comprise two, and the plurality of battery cells 1 are placed between the two side plates 2, and the plurality of battery cells 1 are wrapped to form a whole by driving the two side plates 2 to approach each other. The binding belt 3 is transversely wrapped around the circumferential side of the two side plates 2, and the plurality of battery cells 1 are fixed by tightening the binding belt 3, and the two movable ends of the binding belt 3 are fixed by heat sealing or welding, thereby realizing the packaging and fixing of the battery group. It is worth noting that only a single binding belt 3 is used to package the battery group, and the binding belt 3 is located at the center line of the side plate 2 and is flush with the center of gravity of the battery cell 1, thereby providing a binding force to the center of the battery cell 1 to prevent the battery pack from turning over. Through the above scheme, the single binding belt 3 is used to package the battery group, which not only reduces the packaging time of the battery group, thereby improving the packaging efficiency of the battery group, but also fixes the battery group from the center line of the battery group, thereby balancing the stress of the battery group and reducing the risk of the battery group turning over, thereby improving the stability of the battery group packaging and fixing, and being conducive to improving the safety of the battery group.

[0022] Further, the binding belt 3 is a steel belt, or is replaced by a nylon belt. In the embodiment, the binding belt 3 is a steel belt, which not only has toughness and is convenient to bend, but also is not easy to break, thereby effectively improving the stability of the battery group packaging.

[0023] Further, the width of the binding belt 3 is 30mm-50mm, and in this embodiment, the width of the binding belt 3 is 40mm. Compared with the related art, the width of the binding belt 3 is 19mm, the binding belt 3 has a wider binding range in this application, reduces the risk of the binding belt 3 falling off, and the stress on the binding belt 3 is more dispersed, which can balance the stress on the battery pack, thereby improving the stability of the battery pack packaging.

[0024] In the preferred embodiment of the present application, referring to Figure 1 and Figure 2 , the side plate 2 is laterally provided with a limiting groove 4 away from the battery cell 1, the limiting groove 4 is recessed towards the inside of the side plate 2, the width of the limiting groove 4 matches the width of the binding belt 3, the side surface of the binding belt 3 is connected to the inner wall of the limiting groove 4, and the binding belt 3 is limited from upward or downward displacement relative to the side plate 2 by the abutting limiting of the binding belt 3 and the limiting groove 4, thereby preventing the binding belt 3 from sliding off the outside of the side plate 2, and improving the stable connection effect of the binding belt 3.

[0025] In the preferred embodiment of the present application, referring to Figure 1 and Figure 2 , the side plate 2 is integrally connected with a limiting end plate 5 at the side edge, the limiting end plate 5 is formed by bending and extending the side plate 2 towards the side close to the battery cell 1, and the limiting end plate 5 is perpendicular to the side plate 2. The limiting end plate 5 is abutted to the side surface of the battery cell 1 to limit the multiple side surfaces of the battery cell 1 perpendicular to the side plate 2, so that the battery cell 1 is aligned with the side plate 2, preventing the battery cell 1 from falling off the wrapping range of the side plate 2, thereby improving the stability of the battery pack.

[0026] In the preferred embodiment of the present application, the fixing structure further includes a temperature control integrated sheet 6, the temperature control integrated sheet 6 is embedded and installed between two adjacent battery cells 1, temperature sensors are installed on both sides of the temperature control integrated sheet 6, the temperature sensors are in contact with the battery cells 1 to monitor the temperature of the battery cells 1. The top end of the temperature control integrated sheet 6 is also provided with a signal line, the temperature control integrated sheet 6 of the battery cell 1 is communicated with the battery management system through the signal line, the on-off of the battery cell 1 is managed according to the temperature feedback by the temperature sensor, and the temperature of the battery cell 1 is prevented from being too high, thereby improving the safety of the battery pack.

[0027] The experimental principle of the embodiment of the present application is as follows: when the battery pack needs to be assembled and packaged, multiple battery cells 1 are placed between two side plates 2, a temperature control integrated sheet 6 is placed between every two battery cells 1, the two side plates 2 are contracted to wrap and bundle the multiple battery cells 1 together, the battery cells 1 and the side plates 2 are aligned through the limiting end plate 5, and the binding belt 3 is wound around the circumferential side of the two side plates 2, the binding belt 3 is located in the limiting groove 4 of the center line to prevent sliding, compared with the double-belt fixing mode, this scheme not only saves the packaging time and improves the production efficiency, but also makes the fixing structure more stable and improves the safety of the battery pack.

[0028] According to the disclosure and teaching of the above description, the person skilled in the art of the present application can also change and modify the above embodiments. Therefore, the present application is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by the person skilled in the art on the basis of the present application belongs to the protection scope of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.

Claims

1. A single steel strip fixing structure for a battery pack, comprising at least two battery cells (1), characterized in that, It also includes a side plate (2) and a binding strap (3). There are two side plates (2), and multiple battery cells (1) are disposed between the two side plates (2). The binding strap (3) is wrapped around the two side plates (2) to tighten and fix the battery cells (1). The binding strap (3) is located on the center line of the side plate (2).

2. The battery pack single steel strip fixing structure according to claim 1, characterized in that, A limiting groove (4) is provided laterally on the side of the side plate (2) away from the battery cell (1), and the side of the binding strap (3) is engaged with the inner wall of the limiting groove (4).

3. The battery pack single steel strip fixing structure according to claim 1, characterized in that, The side plate (2) is provided with a limiting end plate (5) on its side. The limiting end plate (5) extends along the side close to the battery cell (1) and is perpendicular to the side plate (2).

4. The battery pack single steel strip fixing structure according to claim 1, characterized in that, It also includes a temperature control integrated chip (6), which is embedded between two adjacent cells (1) and is electrically connected to the battery management system.

5. The battery pack single steel strip fixing structure according to claim 1, characterized in that, The restraint strap (3) is a steel strap.

6. The battery pack single steel strip fixing structure according to claim 1, characterized in that, The width of the restraint strap (3) is 30mm-50mm.

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