Blade battery cell module structure

Abstract

The utility model discloses a blade battery cell module structure which comprises a battery cell assembly, the battery cell assembly comprises a plurality of heat insulation plates, the heat insulation plates are arranged and distributed in the transverse direction, a blade battery cell is arranged between every two adjacent heat insulation plates, a groove body is formed in the face, facing the blade battery cell, of each heat insulation plate, and the blade battery cell is arranged in the groove body. A breathing gap is formed between the groove body and the blade battery cell; wherein each heat insulation plate is a nano plate. According to the battery cell module disclosed by the utility model, heat insulation is carried out between two adjacent blade battery cells through the nano plate with a small heat conduction coefficient, and meanwhile, a breathing gap is formed between the heat insulation plate and the blade battery cells, so that the module can absorb expansion of the battery cells and fully release the expansion of the battery cells, and the safety performance of the battery cell module is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy power batteries, and in particular to a blade battery cell module structure. Background Art

[0002] With the development of new energy technologies, vehicle requirements for battery energy density, safety, and cost-effectiveness are increasing. Blade cells, with their unique advantages, have become a hot topic in industry research. However, achieving efficient, safe, and economical blade cell module design remains a pressing challenge. Summary of the Invention

[0003] In view of the above problems existing in the existing blade battery cell modules, the present invention aims to provide a blade battery cell module structure with high safety, long service life and high production efficiency.

[0004] The specific technical solutions are as follows:

[0005] A blade cell module structure comprises: a cell assembly, wherein the cell assembly comprises a plurality of heat shields, wherein the plurality of heat shields are arranged in a transverse direction, and a blade cell is provided between two adjacent heat shields, and each heat shield has a groove on a side facing the blade cell, forming a breathing gap between the groove and the blade cell;

[0006] Wherein, each of the heat insulation boards is a nano board.

[0007] As a further improvement and optimization of this solution, the battery cell module structure further includes a shell, and the battery cell assembly is placed in the shell.

[0008] As a further improvement and optimization of this solution, thermal pads are provided between the top and bottom of the battery module and the housing.

[0009] As a further improvement and optimization of this solution, the thermal pad is a thermally conductive silicone pad.

[0010] As a further improvement and optimization of this solution, the outer shell includes a top plate, a bottom plate and two end plates connected between the top plate and the bottom plate. The left and right sides of the battery cell assembly are respectively limited by the two end plates, and the top of the battery cell assembly is limited by the top plate, and the bottom is limited by the bottom plate.

[0011] As a further improvement and optimization of this solution, the thermal pad is provided between the top plate and the battery core assembly, and between the bottom plate and the battery core assembly.

[0012] As a further improvement and optimization of this solution, a layer of insulating protective member is hot-pressed on the inner side of the top plate.

[0013] As a further improvement and optimization of this solution, the top plate and the end plate, as well as the bottom plate and the end plate are connected by rivets.

[0014] As a further improvement and optimization of this solution, a layer of foamed silicone is bonded to the inner side of each end plate.

[0015] As a further improvement and optimization of this solution, the top plate is provided with a plurality of explosion-proof holes.

[0016] As a further improvement and optimization of this solution, the size of the tank body is slightly smaller than the size of the blade battery cell.

[0017] Compared with the prior art, the above technical solution has the following positive effects:

[0018] (1) In the present invention, two adjacent blade battery cells are insulated by a nanoplate with a small thermal conductivity coefficient. At the same time, there is a breathing gap between the insulation plate and the blade battery cell. The module can absorb the expansion of the battery cell and fully release the expansion of the battery cell, greatly improving the safety performance of the battery cell module.

[0019] (2) In the present invention, a thermal conductive silicone pad is provided to quickly absorb and conduct the heat generated by the blade battery cells during operation. At the same time, the heat insulation board between two adjacent blade battery cells can prevent the heat transfer between the blade battery cells, effectively control the temperature of the battery cells, and improve the cycle life of the entire package.

[0020] (3) In the present invention, a layer of foamed silicone is bonded to the inner side of each end plate. The inner sides of both end plates are bonded with foamed silicone with a high compression rate, which has strong thermal conductivity. At the same time, when the thickness of the battery cell exceeds the deviation, by changing the compression rate of the foamed silicone, the length of the module can be well controlled to meet the assembly requirements of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded schematic diagram of a blade battery module structure of the present invention;

[0022] Figure 2 This is a structural schematic diagram of a heat insulation board of a blade battery module structure of the present invention;

[0023] Figure 3 This is a structural schematic diagram of a top plate of a blade battery module structure of the present invention;

[0024] Figure 4 This is a structural diagram of an end plate of a blade battery module structure of the present invention;

[0025] Figure 5 This is a structural diagram of a plastic bracket and FPC circuit board of a blade battery module structure of the utility model;

[0026] In the attached figure: 1. Outer casing; 2. Heat insulation board; 3. Blade battery cell; 4. Foamed silicone; 5. Thermal pad; 6. FPC circuit board; 7. Plastic bracket; 8. Battery cell connection busbar; 11. Top plate; 12. Bottom plate; 13. End plate; 14. Side plate; 21. Trough body; 111. Explosion-proof hole; 131. Avoidance space. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this utility model and to simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] Figure 1 This is an exploded schematic diagram of a blade battery module structure of the utility model. Figure 2 This is a structural diagram of a heat insulation board of a blade battery module structure of the utility model. Figure 3 This is a structural diagram of the top plate of a blade battery module structure of the utility model. Figure 4 This is a structural diagram of an end plate of a blade battery module structure of the utility model. Figure 5 This is a structural diagram of a plastic bracket and FPC circuit board of a blade battery module structure of the utility model, as shown Figure 1-5As shown, a blade battery cell 3 module structure of a preferred embodiment is shown, including: a battery cell assembly, the battery cell assembly includes a plurality of heat insulation plates 2, the plurality of heat insulation plates 2 are arranged and distributed along the horizontal direction, and there is a blade battery cell 3 between two adjacent heat insulation plates 2, and each heat insulation plate 2 has a groove body 21 on the side facing the blade battery cell 3, and a breathing gap is formed between the groove body 21 and the blade battery cell 3; wherein, each heat insulation plate 2 is a nano plate.

[0031] Preferably, the heat insulation board 2 is bonded to the blade battery cell 3 .

[0032] In this embodiment, two adjacent blade battery cells 3 are insulated by a nanoplate with a low thermal conductivity coefficient. At the same time, there is a breathing gap between the insulation plate 2 and the blade battery cell 3. The module can absorb the expansion of the battery cell so that the expanded part of the battery cell fills the breathing gap, and then fully releases the expansion of the battery cell, greatly improving the safety performance of the battery cell module.

[0033] More preferably, both ends of the blade cell 3 have electrode columns, which are respectively a positive electrode column and a negative electrode column.

[0034] In this embodiment, the blade cell 3 adopts a long strip design, and the positive and negative poles are respectively arranged at the two ends of the blade cell 3, which greatly improves the energy density per unit volume. At the same time, it is also different from the traditional square shell battery cell which causes the waste of space in the entire battery pack height due to the flat poles, thereby improving the energy density of the entire pack.

[0035] Furthermore, as a preferred embodiment, the battery cell module structure also includes a shell 1, and the battery cell assembly is placed in the shell 1. By placing the battery cell assembly in the shell 1, the stability of the module structure of the vehicle is ensured under various working conditions.

[0036] Furthermore, as a preferred embodiment, thermal pads 5 are provided between the top and bottom of the battery module and the housing 1 .

[0037] Furthermore, as a preferred embodiment, the thermal pad 5 is a thermally conductive silicone pad.

[0038] In this embodiment, a thermally conductive silicone pad is provided to quickly absorb and conduct the heat generated by the blade battery cells 3 during operation. At the same time, the heat insulation plate 2 between two adjacent blade battery cells 3 can prevent the heat transfer between the blade battery cells, effectively control the temperature of the battery cells, and improve the cycle life of the entire package.

[0039] Furthermore, as a preferred embodiment, the outer shell 1 includes a top plate 11, a bottom plate 12 and two end plates 13 connected between the top plate 11 and the bottom plate 12. The left and right sides of the battery cell assembly are respectively limited by the two end plates 13, and the top of the battery cell assembly is limited by the top plate 11, and the bottom is limited by the bottom plate 12.

[0040] The housing 1 further includes two side panels 14 , which are distributed front to back and located between the two end panels 13 . The top panel 11 , the bottom panel 12 , the two end panels 13 and the two side panels 14 together form a closed structure.

[0041] Preferably, the top plate 11 and the bottom plate 12 are made of high-strength aluminum plate material.

[0042] As a further embodiment of the present solution, the module structure also includes an FPC circuit board 6, a plastic bracket 7, and several battery cell connection busbars 8 connected to the two ends of several blade battery cells 3. The plastic bracket 7 is bonded to the flange of the top plate 11, and the FPC circuit board 6 is hot-riveted to the plastic bracket 7 through the hot rivets on the plastic bracket 7. All battery cell connection busbars 8 and the busbar lead-out ends on both sides are respectively embedded in the plastic bracket 7.

[0043] More preferably, the plastic bracket 7 is pre-fixed by adhesive bonding, and the busbars in series between the cells can be flexibly adjusted, which effectively avoids rework or scrapping problems caused by position deviation during the busbar welding process and improves production efficiency.

[0044] More preferably, the end plate 13 is made of aluminum alloy, and one end is machined to cut out a space 131 for the busbar lead-out end.

[0045] More preferably, the two side plates 14 are fastened to the plastic bracket 7 using plastic rivets to provide protection and insulation.

[0046] Furthermore, as a preferred embodiment, thermal pads 5 are provided between the top plate 11 and the battery cell assembly, and between the bottom plate 12 and the battery cell assembly.

[0047] Furthermore, as a preferred embodiment, a layer of insulating protective member is hot-pressed on the inner side of the top plate 11 .

[0048] Furthermore, as a preferred embodiment, the top plate 11 and the end plate 13 , as well as the bottom plate 12 and the end plate 13 , are connected by rivets.

[0049] Furthermore, as a preferred embodiment, a layer of foamed silicone 4 is bonded to the inner side of each end plate 13. The inner sides of both end plates 13 are bonded with foamed silicone 4 with a high compression rate, which has strong thermal conductivity. At the same time, when the thickness of the battery cell exceeds the deviation, by changing the compression rate of the foamed silicone 4, the length of the module can be well controlled to meet the assembly requirements of the module.

[0050] Furthermore, as a preferred embodiment, the top plate 11 has a plurality of explosion-proof holes 111 .

[0051] More optimally, the FPC structure of the module includes multiple safety monitoring and protection mechanisms. Each module is equipped with multiple voltage acquisition output terminals and temperature acquisition output terminals, which are aggregated by the FPC circuit board 6 to the communication main harness and then transmitted to the BMS. Multiple explosion-proof holes 111 are opened on the top plate 11 of the module to ensure that the single blade battery cell 3 of the module can quickly release the pressure outside the module under abnormal circumstances without affecting other batteries in the module, thereby ensuring the safety of the entire package.

[0052] Furthermore, the size of the slot body 21 is slightly smaller than that of the blade battery cell 3 .

[0053] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A blade battery module structure, characterized in that: include: A battery cell assembly, wherein the battery cell assembly includes a plurality of heat insulation plates, wherein the plurality of heat insulation plates are arranged in a transverse direction, and a blade battery cell is provided between two adjacent heat insulation plates, and each heat insulation plate has a groove on a side facing the blade battery cell, and a breathing gap is formed between the groove and the blade battery cell; Wherein, each of the heat insulation boards is a nano board.

2. The blade battery module structure according to claim 1, characterized in that: The battery module structure further includes a shell, and the battery assembly is placed in the shell; Thermal pads are provided between the top and bottom of the battery module and the shell.

3. The blade battery module structure according to claim 2, characterized in that: The thermal pad is a thermally conductive silicone pad.

4. The blade battery module structure according to any one of claims 2-3, characterized in that: The shell includes a top plate, a bottom plate and two end plates connected between the top plate and the bottom plate. The left and right sides of the battery cell assembly are respectively limited by the two end plates. The top of the battery cell assembly is limited by the top plate, and the bottom is limited by the bottom plate.

5. The blade battery module structure according to claim 4, characterized in that: The thermal pad is provided between the top plate and the battery core assembly, and between the bottom plate and the battery core assembly.

6. The blade battery module structure according to claim 4, characterized in that: A layer of insulating protective member is hot-pressed on the inner side of the top plate.

7. The blade battery module structure according to claim 4, characterized in that: The top plate and the end plate, and the bottom plate and the end plate are connected by rivets.

8. The blade battery module structure according to claim 4, characterized in that: A layer of foamed silica gel is bonded to the inner side of each end plate.

9. The blade battery module structure according to claim 4, characterized in that: The top plate is provided with a plurality of explosion-proof holes.

10. The blade battery module structure according to claim 1, characterized in that: The size of the tank body is slightly smaller than that of the blade battery core.

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