Battery cell module spacer structure

Abstract

This utility model relates to the field of battery technology, and in particular to a cell module spacing structure, including a PC separator, with a cell module stacked on each of the left and right sides of the PC separator. Each cell module includes multiple cells stacked sequentially in the front-to-back direction. Adjacent cells are bonded and fixed together by silicone foam. The PC separator is bonded and fixed to each cell by a piece of MPP foam. This utility model combines the PC separator with MPP foam and adopts a setting method where one MPP foam corresponds to one cell. Combined with the silicone foam stacking and fixing and the end plate limiting structure, it effectively achieves accurate positioning and good fit between modules, improves overall modal stability, and enhances heat insulation and thermal runaway protection performance. This solves the problems in the prior art where the blue film of the cell is worn due to the extrusion and deformation of the MPP foam, the risk of short circuit is increased, and the overall thermal management and structural stability of the module are insufficient.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell module spacing structure. Background Technology

[0002] With the rapid development of new energy battery technology, the safety, thermal management performance, and structural stability of power battery modules are receiving increasing attention. In the design and assembly of battery modules, the insulating materials between modules play a crucial role, affecting not only the heat conduction behavior between cells but also directly impacting the overall mechanical stability and lifespan of the module.

[0003] In the prior art, PC boards are typically used as the insulating material between modules, such as the square aluminum-cased battery module for electric vehicles disclosed in utility model publication CN209747589U. Alternatively, MPP foam is used as the insulating material between modules, such as the novel lithium battery module disclosed in utility model publication CN208423000U.

[0004] However, while PC boards can improve the overall modal performance of the module, their thermal insulation is poor and their thermal runaway protection is insufficient. MPP foam, on the other hand, has good thermal insulation, electrical insulation and cushioning properties, but if used as a single piece, it is prone to deformation and wrinkling during module stacking. After being placed in the box, it is easily worn by vibration and friction, which can cause short circuit risk and affect battery life. Utility Model Content

[0005] In view of this, the present invention proposes a cell module spacing structure, which combines PC separators with MPP foam and adopts a setting method of one MPP foam corresponding to one cell. With the help of silicone foam stacking and fixing and end plate limiting structure, it can effectively achieve accurate positioning and good fit between modules, improve overall modal stability, and enhance heat insulation and thermal runaway protection performance. This solves the problems in the prior art of wear of the blue film of the cell and increased short circuit risk caused by the extrusion and deformation of MPP foam, as well as the insufficient overall thermal management and structural stability of the module.

[0006] The technical solution of this utility model is implemented as follows:

[0007] This utility model provides a battery cell module spacing structure, including a PC partition, on which a battery cell module is stacked on each of the left and right sides.

[0008] Each of the battery cell modules includes multiple battery cells stacked sequentially in a front-to-back direction;

[0009] The two adjacent battery cells are bonded and fixed together by silicone foam.

[0010] The PC partition is fixed to each of the battery cells by an MPP foam piece.

[0011] Based on the above technical solutions, preferably, both the silicone foam and the MPP foam have adhesive backing.

[0012] Based on the above technical solutions, preferably, both the silicone foam and the MPP foam are rectangular plate-shaped structures.

[0013] Based on the above technical solutions, preferably, a gap is reserved between the two adjacent MPP foams.

[0014] Based on the above technical solution, preferably, the top left and right sides of the PC partition are provided with first flanges along the horizontal direction, wherein,

[0015] The bottom surface of the first flange is in contact with the top surface of the battery cell.

[0016] Based on the above technical solutions, preferably, the top of the PC partition protrudes upward beyond the top of the first flange.

[0017] Based on the above technical solutions, preferably, PC end boards are bonded to both the front and rear ends of the battery cell module.

[0018] Based on the above technical solution, preferably, the left and right sides of the front end of the PC partition are provided with second flanges along the transverse direction, wherein,

[0019] The rear end face of the second flange is in contact with the front end face of the PC end plate on the front side.

[0020] Based on the above technical solutions, preferably, the top of the second flange is attached to the front end of the first flange.

[0021] Based on the above technical solutions, preferably, the width of the second flange is the same as that of the first flange.

[0022] The cell module spacing structure of this utility model has the following advantages over the prior art:

[0023] (1) By combining PC partition with MPP foam and using a single MPP foam to correspond to a single battery cell, and using silicone foam to achieve battery cell stacking and fixing, the overall modal stability of the module is improved. At the same time, the battery cell blue film is prevented from being damaged by compression deformation during assembly, reducing the risk of short circuit and significantly enhancing the heat insulation and thermal runaway protection capabilities.

[0024] (2) By leaving a gap between two adjacent MPP foams, it can not only adapt to the installation deviation caused by the cell thickness error, but also form an effective heat dissipation channel, improve the overall thermal management performance of the module, and extend the battery life.

[0025] (3) The first flange at the top of the PC partition and the second flange at the front end together serve to limit and support, ensuring that the stacking height of the cells is consistent and improving the assembly accuracy and module structure stability.

[0026] (4) By setting the top of the PC separator to protrude from the top of the first flange, the power tripping phenomenon caused by excessive voltage between cells can be effectively prevented, thereby avoiding damage to the cells and further improving the safety and reliability of the battery system.

[0027] (5) By bonding PC end plates to the front and rear ends of the cell module and attaching the second flange to the front PC end plate, the end of the module is sealed and reinforced, the overall structural rigidity is enhanced, the cell is prevented from loosening, the vibration and impact resistance is improved, and the battery life is further extended. Attached Figure Description

[0028] 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 these drawings without creative effort.

[0029] Figure 1 This is a perspective view of a battery cell module spacing structure according to the present invention;

[0030] Figure 2 This is a partial exploded view of the cell module spacing structure of this utility model;

[0031] Figure 3 This is a partial 3D view of the PC partition.

[0032] In the diagram: 1. PC separator; 2. Battery cell; 3. Silicone foam; 4. MPP foam; 5. PC end plate; 11. First flange; 12. Second flange. Detailed Implementation

[0033] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] like Figure 1-3 As shown, the present invention provides a battery cell module spacing structure, including a PC partition 1, on which a battery cell module is stacked on the left and right sides respectively.

[0035] Each battery cell module includes multiple battery cells 2 stacked sequentially in the front-to-back direction; adjacent battery cells 2 are bonded and fixed together by silicone foam 3; PC partition 1 is bonded and fixed to each battery cell 2 by a piece of MPP foam 4.

[0036] By combining PC partition 1 with MPP foam 4 and arranging each MPP foam 4 corresponding to a single battery cell 2, and using silicone foam 3 to achieve stacking and fixation of the battery cells 2, this structure can improve the overall thermal insulation and thermal runaway effect while enhancing the module mode, thus achieving overall stability and safety, due to the MPP foam 4 having a certain compression space and excellent thermal insulation and thermal runaway effect.

[0037] In addition, the design of a single MPP foam 4 avoids wrinkles in the MPP foam 4 when the two battery modules are placed in the box, reduces wear at the rounded corners of the battery cell 2 and damage to the blue film of the battery cell 2, reduces the risk of short circuit, and significantly enhances the thermal insulation and thermal runaway protection capabilities.

[0038] In the aforementioned cell module spacing structure, both the silicone foam 3 and the MPP foam 4 have adhesive backing, meaning that both sides of the silicone foam 3 and the MPP foam 4 have adhesive backing, which is self-adhesive. This adhesive backing enhances the connection strength between cells 2 and between cells 2 and the PC separator 1, effectively preventing material detachment or displacement, and improving assembly reliability and long-term stability.

[0039] Furthermore, both silicone foam 3 and MPP foam 4 are rectangular plate-shaped structures, which facilitates standardized production and mass assembly, improving manufacturing efficiency. At the same time, their dimensions are compatible with those of battery cell 2, ensuring a good fit and consistent installation.

[0040] In addition, a gap is reserved between two adjacent MPP foams 4. This gap not only accommodates installation deviations caused by thickness errors of the battery cell 2, but also forms an effective heat dissipation channel, improving the overall thermal management performance of the module and extending battery life.

[0041] In the aforementioned cell module spacing structure, first flanges 11 are provided laterally on the left and right sides of the top of the PC partition 1, wherein the bottom surface of the first flanges 11 is in contact with the top surface of the cell 2. The first flanges 11 serve to limit and support, ensuring that the stacking height of the cell 2 is consistent, thereby improving assembly accuracy and the overall structural stability of the module.

[0042] In addition, the top of the PC separator 1 protrudes upward beyond the top of the first flange 11. This structure, which makes the top of the PC separator 1 higher than the top of the cell 2, can prevent power outages caused by excessive voltage between the cells 2, thereby avoiding damage to the cells 2 and further improving the safety and reliability of the battery system.

[0043] In the aforementioned cell module spacing structure, PC end plates 5 are bonded to both the front and rear ends of the cell module. Specifically, the front PC end plate 5 is bonded and fixed to the front end of the foremost cell 2, and the rear PC end plate 5 is bonded and fixed to the rear end of the last cell 2. The PC end plates 5 seal and reinforce the ends of the module, enhancing the overall structural rigidity, preventing cell 2 from loosening, and improving the module's vibration and impact resistance during transportation and use. Furthermore, replacing traditional aluminum end plates with PC end plates effectively reduces module weight, improves the space utilization of the housing, and provides good corrosion resistance and conductivity.

[0044] In addition, second flanges 12 are provided on the left and right sides of the front end of the PC partition 1 along the horizontal direction, wherein the rear end face of the second flange 12 is in contact with the front end face of the front PC end plate 5. Through this structure, the accurate positioning and fixation of the front structure of the module can be achieved, improving the stability of the module end connection and the assembly consistency.

[0045] In addition, the top of the second flange 12 fits against the front end of the first flange 11, and the widths of the second flange 12 and the first flange 11 are the same. This structure further strengthens the connection between the front and rear structures of the PC partition 1, forming an integral load-bearing structure and improving the overall mechanical stability and assembly accuracy of the module.

[0046] The method of using the cell module spacing structure of this utility model is as follows:

[0047] Using PC separator 1 as a reference, first attach silicone foam 3 to one side of battery cell 2. Then, attach PC end plate 5 to the other side of one of the battery cells 2, and then press the PC end plate 5 on one side of the battery cell 2 against the second flange 12 at the front end of PC separator 1, with the top of the battery cell 2 only against the first flange 11. Using this as a reference, stack multiple battery cells 2, and attach PC end plate 5 to the rear end of the last battery cell 2. After stacking the battery cells 2, remove the stacked battery cell module. Make another battery cell module using the same method.

[0048] On the side of the two cell modules near the PC partition 1, attach a single MPP foam 4 (i.e., attach one MPP foam 4 to the side of each cell 2). Finally, attach the side of the MPP foam 4 to the PC partition 1 to fix it in place, thus completing the stacking of the entire module.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cell module spacing structure, comprising a PC separator (1), characterized in that: A battery cell module is stacked on each of the left and right sides of the PC partition (1), wherein, Each of the battery cell modules includes multiple battery cells (2) stacked sequentially in the front-to-back direction; The two adjacent battery cells (2) are bonded and fixed together by silicone foam (3); The PC partition (1) is bonded and fixed to each of the battery cells (2) by a piece of MPP foam (4).

2. The cell module spacing structure as described in claim 1, characterized in that: Both the silicone foam (3) and the MPP foam (4) have adhesive backing.

3. The cell module spacing structure as described in claim 1, characterized in that: Both the silicone foam (3) and the MPP foam (4) are rectangular plate-like structures.

4. The cell module spacing structure as described in claim 1, characterized in that: A gap is reserved between the two adjacent MPP foams (4).

5. The cell module spacing structure as described in claim 1, characterized in that: The top left and right sides of the PC partition (1) are provided with first flanges (11) along the horizontal direction, wherein, The bottom surface of the first flange (11) is in contact with the top surface of the battery cell (2).

6. The cell module spacing structure as described in claim 5, characterized in that: The top of the PC partition (1) protrudes upward from the top of the first flange (11).

7. The cell module spacing structure as described in claim 5, characterized in that: PC end plates (5) are bonded to both the front and rear ends of the battery cell module.

8. The cell module spacing structure as described in claim 7, characterized in that: The PC partition (1) has second flanges (12) arranged laterally on the left and right sides of its front end. The rear end face of the second flange (12) is in contact with the front end face of the PC end plate (5) on the front side.

9. The cell module spacing structure as described in claim 8, characterized in that: The top of the second flange (12) is in contact with the front end of the first flange (11).

10. The cell module spacing structure as described in claim 8, characterized in that: The second flange (12) has the same width as the first flange (11).

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