Blade battery cell module

Abstract

The utility model belongs to the field of lithium batteries, and provides a blade battery cell module which comprises a plurality of blade battery cells distributed side by side, series aluminum rows are arranged at the electrode ends of the blade battery cells, and an assembly component is arranged on the outer sides of the blade battery cells, the blade battery cell module is characterized in that the assembly component comprises a tray, module frames are arranged on the two sides of the tray, and the module frames are arranged on the tray. An insulating plate is arranged between the module frame and the blade battery cells, a silica gel pad is arranged between every two adjacent blade battery cells, all the blade battery cells, the silica gel pads, the module frame and the insulating plate are connected into a group through a steel binding band and a plastic binding band, and the blade battery cells connected into the group are welded to a series aluminum row. The inner side of the tray is provided with a structural adhesive layer which is bonded and matched with the blade battery cell. According to the utility model, a module form is adopted and is independent of the battery box body, so that subsequent maintenance and replacement are facilitated; and the blade battery cells connected into groups are subjected to the process steps of welding series aluminum rows and then gluing, so that the battery cells which are not welded well can be conveniently replaced and repaired.

Description

Technical Field

[0001] The utility model belongs to the field of lithium batteries, relates to blade batteries, and in particular to a blade battery module. Background Art

[0002] Blade batteries are essentially lithium iron phosphate batteries, but they are different from traditional cylindrical single cells, and are long, thin and blade-shaped. Compared with traditional single cylindrical batteries, which have too many gaps between cells when stacked, flat blade batteries can make full use of the space inside the battery assembly.

[0003] As new energy technologies are constantly updated and iterated, blade cells can be directly integrated into the battery pack through structural innovation, skipping the "module", which improves the volume utilization rate of the battery pack and greatly improves the energy density. However, there are problems: ① In the existing technology, the blade cells are bonded and fixed to the box, and after the structural adhesive is cured, the cells and the box form an inseparable integrated structure, which makes it difficult to remove the cells and inconvenient for subsequent maintenance and replacement; ② After all cells are bonded and fixed to the PACK, the aluminum bars in series are welded, which requires high welding process capabilities. If there is a problem in the welding process, it is difficult to replace a single cell in the module. Utility Model Content

[0004] In view of the technical problems existing in the above-mentioned blade cells, the utility model proposes a blade cell module with reasonable design and simple structure, which improves the convenience of maintenance while ensuring the structural strength of the battery pack.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides a blade battery cell module, including a plurality of blade batteries distributed side by side, the electrode ends of the blade batteries are provided with series-connected aluminum bars, and the outer sides of the blade batteries are provided with assembly components, characterized in that the assembly components include a tray, module frames are provided on both sides of the tray, an insulating plate is provided between the module frame and the blade batteries, and silicone pads are provided between adjacent blade batteries. All blade batteries, silicone pads, module frames and insulating plates are connected into groups by steel straps and plastic straps, and the blade batteries after being connected into groups are welded to the series-connected aluminum bars, and the inner side of the tray is provided with a structural adhesive layer that is bonded to the blade batteries.

[0006] Preferably, the module frame comprises a plurality of sections of square tubes connected by the square tubes to form a Japanese character shape.

[0007] Preferably, a plurality of lifting holes are provided on the square tube.

[0008] Preferably, the square tube is provided with a plurality of fixing holes, the tray is provided with through holes corresponding to the fixing holes, and the through holes are connected to the fixing holes via a connecting piece.

[0009] Preferably, the series aluminum bar includes a positioning plate, both ends of which are connected to a slot plate arranged at the end of the module frame, a plurality of structural holes are arranged on the positioning plate, an aluminum plate connected to the positioning plate by screws is arranged on the outer side of the structural hole, an electrode head is arranged on the aluminum plate, and a lead is arranged at the electrode head.

[0010] Preferably, the silicone pads between adjacent blade batteries are distributed in three sections.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. The utility model provides a blade battery cell module, which is in the form of a module and is independent of the battery box, so it is convenient for subsequent maintenance and replacement; the blade batteries connected in groups adopt the process steps of welding the aluminum bars in series and then applying glue, which is convenient for replacing and repairing the batteries with poor welding. Therefore, while ensuring the structural strength of the battery pack, the maintenance convenience is improved. The design is reasonable, the practicability is strong, and it is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 An axonometric diagram of a blade battery module provided in an embodiment;

[0015] Figure 2 An exploded view of a blade battery module provided in an embodiment;

[0016] In the above figures, 1. Blade cell; 2. Series aluminum bar; 21. Positioning plate; 22. Aluminum plate; 23. Electrode head; 24. Lead; 3. Assembly component; 31. Tray; 311. Via hole; 32. Module frame; 321. Lifting hole; 322. Fixing hole; 33. Insulation board; 34. Plastic strap; 35. Steel strap; 4. Silicone pad. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0019] Examples, such as Figure 1 , Figure 2 As shown, a blade battery module provided by the utility model comprises a plurality of blade batteries 1 arranged side by side, the electrode end of the blade battery 1 is provided with a series aluminum row 2, and an assembly component 3 is provided on the outside of the blade battery 1. Among them, the blade battery 1 is a prior art, and this embodiment will not be repeated here. On this basis, the assembly component 3 provided by the utility model comprises a tray 31, module frames 32 are provided on both sides of the tray 31, an insulating plate is provided between the module frame 32 and the blade battery 1, and a silicone pad 4 is provided between adjacent blade batteries 1. All blade batteries 1, silicone pads 4, module frames 32 and insulating plates are connected into groups by steel bands 35 and plastic bands 34. After being connected into groups, the blade batteries 1 are bonded to the back adhesive layer provided on the back of the series aluminum row 2, and the inner side of the tray 31 is provided with a structural adhesive layer that is bonded to the blade batteries 1. Among them, an insulating plate is used between the blade cell 1 and the module frame 32 to play the role of insulation on both sides. In addition to setting an insulating plate between the module frame 32 and the blade cell 1, an insulating sheet can also be attached above the series aluminum bar 2 to play the role of insulation.

[0020] Specifically, the blade cells 1 are separated by silicone pads 4 to provide a buffer between adjacent blade cells 1, which is beneficial to improving the binding effect of the plastic straps 34 and the two steel straps 35 on the two sides on the blade cells 1, the insulating plate and the module frame 32; the blade cells 1 connected into groups are grouped but not completely bonded, so the two ends of the connected groups can be welded to the series aluminum bars 2 first, and then coated with glue, and the adhesive layer coated on the back of the series aluminum bars 2 can be bonded to the blade cells 1, and if defective blade cells 1 or defective welding points are found during the welding process, they can be replaced and repaired, thereby ensuring the structural strength of the battery pack while improving the convenience of maintenance; after the welding is completed, check that the welding quality meets the requirements and then place the pre-tightened module on the tray 31 coated with structural glue, so as to complete the modular production of the blade module.

[0021] In order to improve the structural reliability of the module frame 32, the module frame 32 provided by the utility model includes multiple sections of square tubes and is connected by the square tubes in a Japanese shape. The square tubes themselves have high structural strength and pressure resistance. At the same time, they can have a reasonable constraint span for all blade batteries 1 within their constraint range, and can fully meet the safety and stability of placing the module in the battery box.

[0022] In order to facilitate the transfer of the product, the utility model is provided with a plurality of hoisting holes 321 on the square tube which can be connected and matched with hoisting tools so as to lift and transfer the device.

[0023] In order to improve the stability of the device, the utility model is provided with a plurality of fixing holes 322 on the square tube, and the tray 31 is provided with through holes 311 corresponding to the fixing holes 322 , and the through holes 311 are connected to the fixing holes 322 via a connecting piece.

[0024] In order to improve the practicality of the series aluminum bar 2, the series aluminum bar 2 provided by the utility model includes a positioning plate 21, a plurality of structural holes are arranged on the positioning plate 21, an aluminum plate 22 connected to the positioning plate 21 by screws is arranged on the outside of the structural holes, an electrode head 23 is arranged on the aluminum plate 22, and a lead 24 is arranged at the electrode head 23. Among them, the two ends of the positioning plate 21 are fin structures, and the fin structure is connected to the slot plate arranged at the end of the module frame 32 by bolts, so that the structural hole can face the electrode end of the blade battery cell 1, and provide a basis for the fixation of the aluminum plate 22. At the same time, the aluminum plate 22 can also directly contact the electrode end of the blade battery cell 1, so as to realize welding of the welding spot, so that the lead 24 can establish an effective electrical connection relationship between the device and the power consumption and power supply equipment.

[0025] While providing pressure buffering for the adjacent blade batteries 1, in order to ensure the heat dissipation performance between the structures, the silicone pads 4 provided by the utility model between the adjacent blade batteries 1 are distributed in three sections, reserving a certain gap for the blade batteries to facilitate heat dissipation.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A blade battery module, comprising a plurality of blade batteries arranged side by side, wherein the electrode ends of the blade batteries are provided with a series-connected aluminum bar, and an assembly component is provided on the outer side of the blade batteries, characterized in that: The assembly component includes a pallet, module frames are provided on both sides of the pallet, an insulating plate is provided between the module frame and the blade cells, and a silicone pad is provided between adjacent blade cells. All blade cells, silicone pads, module frames and insulating plates are connected into groups by steel straps and plastic straps. The blade cells after being connected into groups are welded to the series aluminum bars, and a structural adhesive layer that is bonded to the blade cells is provided on the inner side of the pallet.

2. A blade battery module according to claim 1, characterized in that: The module frame comprises a plurality of sections of square tubes which are connected by the square tubes to form a Japanese character shape.

3. A blade battery module according to claim 2, characterized in that: A plurality of lifting holes are arranged on the square tube.

4. A blade battery module according to claim 3, characterized in that: The square tube is provided with a plurality of fixing holes, the tray is provided with through holes corresponding to the fixing holes, and the through holes are connected to the fixing holes through a connecting piece.

5. The blade battery module according to claim 1, characterized in that: The series aluminum bar includes a positioning plate, both ends of which are connected to a slot plate arranged at the end of a module frame, a plurality of structural holes are arranged on the positioning plate, an aluminum plate connected to the positioning plate by screws is arranged outside the structural holes, an electrode head is arranged on the aluminum plate, and a lead is arranged at the electrode head.

6. The blade battery module according to claim 1, characterized in that: The silicone pads between adjacent blade cells are distributed in three sections.

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