Battery cell module fixing device

Abstract

The utility model provides a battery cell module fixing device. An innovative battery module fixing device is introduced. The heat insulation foam is added between the stacked soft package battery units and the plastic end plates, so that the problem of thermal runaway of the battery units is solved, and heat transfer between the units is effectively blocked. In addition, the battery units are pre-tensioned by adopting an external tool and are fixed by using a binding belt, so that the cycle life and the overall life of the battery are prolonged. The device further comprises a collecting plate provided with a temperature sensor and a voltage sensor, and safe and efficient operation is ensured. The power distribution box is also provided with an output copper bar, an insulating cover and an insulating sheet, improves the electrical safety and performance, and is easy to install and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery core module fixing device. Background Art

[0002] The existing module technology is a way of fixing the battery cells in a free state. At the same time, no insulation material is added between the battery cells. Injection molded parts and copper busbars are used in series and parallel connection at the pole ears on both sides. The outside is wrapped with galvanized sheet metal to fix the battery cells and the plastic brackets on both sides. Utility Model Content

[0003] The purpose of the utility model is to optimize the number of charge and discharge cycles of the battery cell and maximize the life cycle, effectively control the heat spread reaction, and improve the customer experience. A method for fixing soft-pack battery cells in series and a battery module fixing device are invented.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A battery cell module fixing device comprises a battery cell module body composed of a plurality of stacked soft-pack battery cells, wherein plastic end plates are provided on both sides of the battery cell module body along the stacking direction of the soft-pack battery cells; and heat insulating foam is added between the soft-pack battery cells and between the soft-pack battery cells and the plastic end plates.

[0006] In the utility model, by adding heat insulating foam between the battery cells, the heat transfer between the battery cells is effectively blocked, and the thermal runaway between the battery cells is prevented, and the assembly runaway is prevented from extending to the natural environment.

[0007] Preferably, the plastic end plate is provided with at least one pair of strapping grooves for strapping into, and the pair of strapping grooves are respectively arranged on the upper and lower end surfaces of the plastic end plate; each plastic end plate is provided with two pairs of strapping grooves, and the strapping grooves on the two plastic end plates are arranged opposite to each other in the stacking direction of the soft-pack battery cells, and the plastic end plate, the soft-pack battery cells and the insulation foam are tightened and fixed on the strapping grooves by using strapping tape; the number of battery cell cycles and the service life of the battery cells are increased by applying a pre-tightening force.

[0008] As a preferred method, after fixing and tightening, a collection board is installed at the pole ears on both sides of the soft-pack battery cell, and the collection board is passed through the two sides of the soft-pack battery cell and fixed to the plastic end plate by bolts; after fixing the collection board, the pole ears of the soft-pack battery cell are pre-folded to achieve series and parallel connection, and the adjacent pole ears are welded. A temperature sensor and a voltage sensor are provided on the collection board, and the collection board is fixed to the plastic end plate to further enhance the strength of the module and make it safer. The collection board is provided with temperature and voltage sensors to collect the battery cell voltage and the temperature at the pole ears. By monitoring the temperature and voltage in real time, the collection board can help ensure that the system operates within a safe and effective operating range. Abnormal fluctuations in temperature and voltage may cause safety risks. Real-time monitoring helps prevent overheating, overload and other safety risks.

[0009] Preferably, a battery module fixing device includes an output copper bar, which is in contact with a collection board and fixed to a plastic end plate by bolts. The copper bar is usually made of a highly conductive copper material, so it can effectively conduct current and better manage heat and current distribution, thereby improving the reliability and performance of the system.

[0010] Preferably, the outer periphery of the collection board is wrapped with an insulating protective cover, the two ends of the insulating protective cover are respectively fixed on the two plastic end plates, an insulating sheet is installed on the battery module body, and the two insulating sheets are fixed on the upper and lower end surfaces of the battery module by strapping tapes, and the insulating protective cover is assembled to the collection board, and the insulating sheet is assembled above the soft-pack battery. The insulating protective cover and the insulating sheet are materials with good insulation properties to isolate electrical components and prevent current leakage and short circuit.

[0011] Preferably, a threaded hole is provided on the plastic end plate, and a screw is connected to the inner thread of the threaded hole to realize series-parallel connection. The battery cell module device is installed to the box body through the screw, which is convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the method for fixing the soft-pack battery cell in Example 1;

[0013] Figure 2 is a schematic diagram of a battery module of Example 1;

[0014] The parts indicated by the numbers in the accompanying drawings are as follows:

[0015] 1. Plastic end plate; 2. Insulation foam; 3. Soft-pack battery cell; 4. Collection board; 5. Output copper busbar; 6. Bolt; 7. Insulation protection cover; 8. Bundling belt; 9. Insulation sheet; 10. Screw; 20. Battery module body. DETAILED DESCRIPTION

[0016] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0017] Example 1

[0018] like Figure 1-2 As shown, this embodiment provides a battery cell module fixing device, the battery cell module fixing device 20 includes a battery cell module body 20 composed of a plurality of stacked soft-pack battery cells 3, and plastic end plates 1 are provided on both sides of the battery cell module body along the stacking direction of the soft-pack battery cells 3; the plastic end plates 1 and the soft-pack battery cells 3 are fixed by strapping tapes 8.

[0019] The plastic end plate 1 is provided with at least one pair of strapping grooves for the strapping belt 8 to be inserted into. The pair of strapping grooves are respectively provided on the upper and lower end surfaces of the plastic end plate 1 .

[0020] Two pairs of bundling grooves are provided on each plastic end plate 1 , and the bundling grooves on the two plastic end plates 1 are arranged opposite to each other in the stacking direction of the soft-pack battery cells.

[0021] In this embodiment, a tool is used to squeeze the plastic end plates 1 on both sides to provide pre-tightening force for the battery cells 3; after reaching the specified pre-tightening force requirement, the plastic end plates 1, the soft-pack battery cells 3 and the insulation foam 2 are tightened and fixed using the bundling tape 8.

[0022] In this embodiment, after being fixed and tightened, a collection board 4 is installed at the pole ears on both sides of the soft-pack battery cell 3, and the collection board 4 is passed through the two sides of the soft-pack battery cell 3 and fixed to the plastic end plate 1 by bolts 6; after fixing the collection board 4, the pole ears of the soft-pack battery cell 3 are pre-folded to realize series-parallel connection, and a temperature and voltage sensor is provided on the collection board 4 to collect the battery cell voltage and the temperature at the pole ears.

[0023] The temperature and voltage sensors on the acquisition board in this embodiment can monitor the working status of the battery cells in real time, which is crucial for the battery management system to optimize the performance and safety of the battery. It can detect abnormal conditions of the battery cells in time to prevent safety problems that may be caused by overheating or overvoltage. The series and parallel connection of the battery cells is achieved by pre-folding the battery cell tabs, which helps to build battery modules and optimize their electrical performance.

[0024] In this embodiment, heat insulating foam 2 is added between the soft-pack battery cells 3 and between the soft-pack battery cells 3 and the plastic end plate 1 .

[0025] By using the insulating material between the soft-pack battery cells in this embodiment and applying pre-tightening force to the soft-pack battery cells through the plastic end plates on both sides and fixing them with bundling tape, heat transfer between the battery cells is effectively blocked, thermal runaway between the battery cells is prevented, and assembly runaway is prevented from extending to the natural environment; adding pre-tightening force increases the number of battery cell cycles and the service life of the battery cells.

[0026] In this embodiment, an output copper bar 5 is provided between the collection board 4 and the plastic end board 1 . The output copper bar 5 is in contact with and connected to the collection board 4 . The output copper bar 5 is fixed to the plastic end board 1 by bolts 6 .

[0027] Through this embodiment, a stable and efficient electrical connection is provided, the copper busbar ensures the smooth flow of electrical energy, and the output copper busbar fixed to the plastic end plate provides a stable electrical connection, thereby enhancing the reliability of the entire system.

[0028] In this embodiment, the outer periphery of the collection board 4 is wrapped with an insulating protective cover 7, and the two ends of the insulating protective cover 7 are respectively fixed on the two plastic end plates 1. An insulating sheet 9 is installed on the battery cell module body 20. The two insulating sheets 9 are fixed on the upper and lower end surfaces of the battery cell module by strapping tapes 8. The insulating protective cover 7 is assembled to the collection board 4, and the insulating sheet 9 is assembled above the soft-pack battery cell 3. After the series-parallel connection, the battery cell module device 20 and the screw 10 are realized, and the battery cell module device 20 is installed to the box through the screw 10.

[0029] In this embodiment, the insulating protective cover 7 is assembled to the acquisition board 4, and the insulating sheet 9 is installed above the soft-pack battery cell 3. Such a configuration can provide additional protection and insulation to ensure safe isolation between the battery cell and the electrical components. A threaded hole is provided on the plastic end plate, and a screw 10 is threadedly connected to the threaded hole. After the series and parallel connection is completed, the screw 10 is used to fix the battery module device 20. The battery module device 20 is installed in a box by the screw 10 to ensure the stability and safety of the battery cell. This embodiment not only improves the physical protection and electrical safety of the battery module, but also simplifies the assembly process and improves the assembly efficiency.

[0030] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0031] The above is a schematic description of the present invention and its implementation methods, which is not restrictive. The embodiments shown are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the scope of protection of the present invention.

Claims

1. A battery module fixing device, characterized in that: The invention comprises a battery module body (20) composed of a plurality of stacked soft-pack battery cells (3), wherein plastic end plates (1) are provided on both sides of the battery module body along the stacking direction of the soft-pack battery cells (3); and heat insulating foam (2) is added between the soft-pack battery cells (3) and between the soft-pack battery cells (3) and the plastic end plates (1).

2. A battery cell module fixing device according to claim 1, characterized in that: The plastic end plate (1) is provided with at least one pair of strapping grooves for the strapping belt (8) to be inserted into, and the pair of strapping grooves are respectively arranged on the upper and lower end surfaces of the plastic end plate (1).

3. The battery module fixing device according to claim 1, characterized in that: Two pairs of bundling grooves are provided on each plastic end plate (1), and the bundling grooves on the two plastic end plates (1) are arranged opposite to each other in the stacking direction of the soft-pack battery cells. The plastic end plates (1), the soft-pack battery cells (3) and the heat-insulating foam (2) are tightened and fixed on the bundling grooves using bundling straps (8).

4. The battery core module fixing device according to claim 1, characterized in that: After being fixed and tightened, a collection board (4) is installed at the pole ears on both sides of the soft-pack battery cell (3), and the collection board (4) is fixed to the plastic end plate (1) by bolts (6); after the collection board (4) is fixed, the pole ears of the soft-pack battery cell (3) are pre-folded to achieve series connection, and adjacent pole ears are welded, and a temperature sensor and a voltage sensor are provided on the collection board.

5. A battery cell module fixing device according to claim 4, characterized in that: An output copper busbar (5) which is in contact with the collection board (4) is fixed on the plastic end plate (1).

6. A battery core module fixing device according to claim 4, characterized in that: The outer periphery of the collection plate (4) is wrapped with an insulating protective cover (7), and two ends of the insulating protective cover (7) are respectively fixed on two plastic end plates (1).

7. The battery module fixing device according to claim 1, characterized in that: An insulating sheet (9) is mounted on the battery cell module body (20), and two insulating sheets (9) are fixed to the upper and lower end surfaces of the battery cell module by means of a binding belt (8).

8. The battery module fixing device according to claim 1, characterized in that: The plastic end plate is provided with a threaded hole, and a screw rod (10) is threadedly connected in the threaded hole.

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