CN207199697U - Battery modules - Google Patents

Abstract

The utility model discloses a battery module group, which comprises at least one I-shaped side plate, the two sides of the I-shaped side plate are provided with accommodating parts; ; Wherein, an anti-expansion block is provided between the I-shaped side plate and the large surfaces of the battery cells located at both ends of the battery cell arrangement direction. Compared with the prior art, the I-shaped side plate adopted by the battery module of the utility model has two accommodating parts, which can accommodate at least two rows of batteries at the same time, so that the number of batteries in a single battery module increases, and the battery module is greatly improved. The energy density of the group is high, and the grouping speed is fast, the process is simple and easy to operate, which reduces the weight and production cost of the battery module; the anti-expansion block cooperates with the I-shaped side plate, on the one hand, it reduces the impact of expansion force on the structure of the battery module On the other hand, the anti-vibration stability of the battery module is improved.

Description

battery module

technical field

The utility model belongs to the battery field, more specifically, the utility model relates to a battery module.

Background technique

Due to its high working voltage, high energy density, no memory effect, and environmental protection, lithium-ion batteries have become the main power source of various consumer electronics products, power products and energy storage, and are widely used in all aspects of people's lives. an integral part of life.

With the rapid development of the battery industry, cost optimization, fast assembly, and simple structure have become the development trend of the industry. At present, in the power battery industry, multiple cells are arranged in parallel in a row, and then the arranged cells are fixed through end plates and side plates to form a battery module. The battery module only includes one row of battery cells, the number of battery cells is small, the energy density of the battery module is low, and this grouping method is cumbersome, the grouping efficiency is low, and the cost is high.

With the development of technology, it is now possible to place more than two rows of batteries in the battery module, but this battery module requires a complete module shell to support the entire module. Although the energy density is improved, the process Complexity, low group efficiency, heavy weight, and high cost still cannot meet the needs of today's development.

In view of this, it is indeed necessary to provide a battery module with high energy density, simple process, low cost and high group efficiency.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a battery module with high energy density, simple process, low cost and high group efficiency.

In order to achieve the above purpose, the utility model provides a battery module, which includes:

At least one I-shaped side panel, the two sides of the I-shaped side panel are provided with receiving parts; and

At least two rows of electric cores are correspondingly accommodated in the accommodation portion of the I-shaped side plate;

Wherein, an anti-expansion block is provided between the I-shaped side plate and the large surfaces of the battery cells located at both ends of the battery cell arrangement direction.

Existing battery modules have only one battery cell accommodation space. In this application, the I-shaped side plate has two accommodation parts, and each accommodation part can accommodate at least one row of battery cells. The number in a single battery module is significantly increased, which significantly improves The energy density of the battery module is improved, and the I-shaped structure can fix and assemble the entire module into a complete whole without other complicated operations. At the same time, the I-shaped side plate can realize the rapid grouping of the battery cells, the grouping efficiency is high, the weight is light, and the structure is simple and the cost is low, which can meet the development needs of the battery industry in today's society.

On the one hand, the anti-expansion block can absorb the expansion force of the battery cell and reduce the impact of the expansion force on the structure of the battery module. On the other hand, it can cooperate with the I-shaped side plate to improve the anti-vibration stability of the battery module.

As an improvement of the battery module of the present invention, the I-shaped side plate includes a middle plate and a fixing plate arranged at both ends of the middle plate and perpendicular to the middle plate, the middle plate extends along the cell arrangement direction, and the fixing plate is located Both ends of the core arrangement direction are opposite to the large surface of the electric core, and the anti-expansion block is located between the fixing plate and the large surface of the electric core.

As an improvement of the battery module of the present invention, an end plate is provided between the fixing plate and the anti-expansion block. The end plates enhance the structural strength of the entire battery module.

As an improvement of the battery module of the present invention, a groove is provided on the side of the end plate facing the battery cell, and the anti-expansion block is fixed in the groove and contacts the battery cell.

As an improvement of the battery module of the present invention, the anti-expansion block is fixed in the groove by structural glue or locking bolts.

As an improvement of the battery module of the utility model, an insulating sheet covering a large surface of the battery core is provided between the anti-expansion block and the battery core. The insulating sheet is used for insulation between the end plate and the battery core. The anti-expansion block indirectly absorbs the expansion force of the battery core through the insulating sheet in contact with the battery core, reducing the impact of the battery expansion force on the entire battery module structure.

As an improvement of the battery module of the present invention, the insulating sheet is provided with a through hole matched with the anti-expansion block, and the anti-expansion block passes through the through hole to contact the battery cell. The anti-expansion block passes through the insulating sheet and directly contacts the battery core, which can better and more directly absorb the expansion force of the battery core, and the effect is better.

As an improvement of the battery module of the present invention, a notch matching the middle plate is opened on the end plate and the insulating sheet, and the middle plate is assembled in the notch.

As an improvement of the battery module of the present invention, the two sides of the fixing plate are provided with clamping edges, and the clamping edges are buckled on the outer sides of the end plates. The clamping edge can limit the position of the end plate in contact with the fixed plate, so as to ensure the stability of the battery module structure.

As an improvement of the battery module of the utility model, the two sides of the end plate are provided with cell limiting ribs facing the cell side and a stepped structure matching the clamping edge of the fixing plate.

Compared with the prior art, the battery module of the utility model has the following beneficial technical effects:

1) The I-shaped side plate has two accommodation parts, which can accommodate at least two rows of cells at the same time. The number of cells in a single battery module is significantly increased, which greatly improves the energy density of the battery module. The grouping speed is fast, the process is simple and easy to operate, the grouping efficiency is improved, and the weight and production cost of the battery module are reduced at the same time.

2) The anti-expansion block cooperates with the I-shaped side plate, on the one hand, it reduces the impact of the expansion force on the structure of the battery module, and on the other hand, it improves the anti-vibration stability of the battery module.

Description of drawings

The battery module of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein:

FIG. 1 is a three-dimensional exploded schematic view of the battery module of the present invention.

FIG. 2 is a schematic diagram of the assembly of the battery module shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of an I-shaped side plate in the battery module shown in FIG. 1 .

FIG. 4 is a schematic structural diagram of an end plate in the battery module shown in FIG. 1 .

FIG. 5 is a schematic top view of the end plate shown in FIG. 4 .

FIG. 6 is a schematic structural diagram of an insulating sheet in the battery module shown in FIG. 1 .

10-battery core; 20-I-shaped side plate; 22-middle plate; 24-fixed plate; 33-ladder structure; 34-module fixing hole; 35-groove; 40-insulation sheet; 42-through hole; 50-anti-expansion block.

Detailed ways

In order to make the purpose, technical solution and technical effect of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the utility model, not for limiting the utility model.

Please refer to Figure 1, Figure 2 and Figure 3, the utility model provides a battery module, which includes:

At least one I-shaped side plate 20, the two sides of the I-shaped side plate 20 are provided with accommodating parts 28; and

At least two rows of battery cells 10 are correspondingly accommodated in the accommodation portion 28 of the I-shaped side plate 20;

Wherein, an anti-expansion block 50 is provided between the I-shaped side plate 20 and the large surfaces of the battery cells 10 located at both ends of the cell 10 in the arrangement direction.

The I-shaped side plate 20 includes a middle plate 22 and fixed plates 24 arranged at two ends of the middle plate 22 and perpendicular to the middle plate 22 , the middle plate 22 and the fixed plate 24 form the I-shaped side plate 20 . The receiving parts 28 are located on both sides of the middle plate 22, and the two rows of battery cells 10 are correspondingly located in the two receiving parts 28. The middle plate 22 extends along the arrangement direction of the battery cells 10 and is located between the two rows of battery cells 10, providing support for the entire structure. The fixing plates 24 are located at both ends of the cells 10 in the arrangement direction and are opposite to the large surfaces of the cells 10 . The I-shaped side plates 20 fix and assemble the two rows of cells 10 into a whole battery module.

In the illustrated embodiment, each accommodating portion 28 of the I-shaped side plate 20 accommodates one row of battery cells 10 , and in other embodiments, each accommodating portion 28 can accommodate two rows or more of battery cells 10 . Preferably, the battery module can also include two or more I-shaped side plates 20, and multiple I-shaped side plates 20 are connected to form a large battery module. In this way, the number of battery cells 10 in a battery module is more Is greatly increased, high energy density.

The anti-expansion block 50 is located between the fixing plate 24 and the large surface of the end cell 10, the anti-expansion block 50 can be elastically deformed to absorb the expansion force of the cell 10, and reduce the impact of the expansion force on the entire battery module frame. Thus ensuring the safety of the battery module. According to a preferred embodiment of the present utility model, the anti-expansion block 50 can be selected from the Ulix rubber block, which has good elastic deformation and deformation recovery capabilities.

Referring to FIGS. 1 to 5 , an end plate 30 is disposed between the fixing plate 24 and the anti-expansion block 50 . Both sides of the fixing plate 24 are provided with clamping edges 26 , and both sides of the end plate 30 are provided with stepped structures 33 matching the clamping edges 26 of the fixing plate 24 . The clip edge 26 is fastened on the stepped structure 33 of the end plate 30 to limit the position of the end plate 30 and prevent the relative position between the fixed plate 24 and the end plate 30 from changing, thereby ensuring the stability of the overall structure. Preferably, the clamping edges 26 on both sides of the fixing plate 24 are welded together with the stepped structure 33 of the end plate 30 to form a welding seam, so that the I-shaped side plate 20 and the end plate 30 are fixedly connected as a whole.

A notch 31 matching the middle plate 22 is opened in the middle of the end plate 30 , and the middle plate 22 can be assembled in the notch 31 during installation. A groove 35 is formed on the side of the end plate 30 facing the cell 10 , and the anti-expansion block 50 is fixed in the groove 35 . Such a design enhances the relative stability among the structures of the anti-expansion block 50 , the end plate 30 and the battery core 10 . Preferably, the anti-expansion block 50 is fixed in the groove 35 by locking bolts or structural glue. The existence of the end plate 30 enhances the structural strength of the entire battery module.

The two sides of the end plate 30 are provided with cell limiting ribs 32, and the cell limiting ribs 32 face the side of the battery 10, and the cell limiting ribs 32 limit the cell 10 close to the end plate 30, Relative movement between the cell 10 and the end plate 30 is prevented. A module fixing hole 34 is provided on the top of the end plate 30, and the battery module can be installed and fixed when the battery module is assembled into a battery pack.

Please refer to Fig. 1, Fig. 2 and Fig. 6, between the anti-expansion block 50 and the cell 10, there is an insulating sheet 40 covering the large surface of the cell 10, and the insulating sheet 40 can make the gap between the end plate 30 and the cell 10 insulation. A notch 31 matching the middle plate 22 is also opened in the middle of the insulating sheet 40 . The insulating sheet 40 is provided with a through hole 42 matching the anti-expansion block 50, and the anti-expansion block 50 directly contacts the battery cell 10 through the through hole 42, so that the expansion force of the battery cell 10 can be quickly and directly absorbed, so that the battery module The anti-expansion protection effect of the group structure is better.

According to a preferred embodiment of the present utility model, between the electric core 10 and the electric core 10, between the electric core 10 and the middle plate 22, between the electric core 10 and the insulating sheet 40, between the insulating sheet 40 and the end plate 30, Structural glue is provided between the end plate 30 and the fixing plate 24, so that the structure of the entire battery module is more stable.

Please refer to Figure 1 and Figure 2, the assembly process of the battery module of the present invention is as follows:

The anti-expansion block 50 is fixed in the groove 35 on the end plate 30 by applying structural glue, and partially protrudes from the surface of the end plate 30 . Assemble the end plate 30 with the anti-expansion block 50 installed on the module assembly fixture, apply structural glue on the cell 10, the insulating sheet 40, and the side of the end plate 30 provided with the groove 35, and place the cell 10. The insulating sheet 40 is placed between the two end plates 30 in order, and the part of the anti-expansion block 50 protruding from the end plate 30 passes through the through hole 42 on the insulating sheet 40 to directly contact the battery cell 10, and is assembled by the module The tooling fixture exerts a certain pre-tightening force on the end plate 30 to evenly press and spread the structural adhesive between the components, so that the battery cell 10 , the insulating sheet 40 and the end plate 30 are fixedly connected. When the module assembly fixture pre-presses the cell 10, the insulating sheet 40 and the end plate 30 to a suitable size, the contact between the middle plate 22 of the I-shaped side plate 20 and the cell 10, as well as the fixed plate 24 and the end plate 30 is coated with structural glue on the contact side, and put into the I-shaped side plate 20, so that the battery cells 10 are located in the accommodation portion 28, the middle plate 22 extends along the direction of the battery cells 10 and is located between the two rows of battery cells 10, and the fixing plate 24 placed on the outside of the end plate 30 and fixedly connected to the end plate 30 by welding to complete the assembly of the entire battery module.

Combining the above detailed description of the utility model, it can be seen that, compared with the prior art, the battery module of the utility model has at least the following beneficial technical effects:

1) The I-shaped side plate 20 has two accommodating parts 28 on both sides thereof, which can accommodate at least two rows of battery cells 10, and the number of battery cells 10 in a single battery module is significantly increased, which greatly improves the energy density of the battery module , and the I-shaped side plate 20 does not require complicated operations when assembling the battery module, and the grouping speed is fast, and at the same time, the weight of the battery module is reduced, and the production cost is reduced.

2) The anti-expansion block 50 is located between the side plate 20 and the large surface of the battery cell 10, which can absorb the expansion force generated by the expansion of the large surface of the battery cell 10, and reduce the impact of the expansion of the battery cell 10 on the entire battery module structure. The anti-expansion block 50 cooperates with the I-shaped side plate 20 to improve the anti-vibration stability of the battery module and ensure the structural stability of the battery module.

According to the above principles, the utility model can also make appropriate changes and modifications to the above embodiments. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (10)

1. A kind of 1. battery modules, it is characterised in that including：

   At least one I-shaped side plate, the both sides of I-shaped side plate are provided with receiving portion；And

   At least two row's battery cores, it is corresponding to be contained in the receiving portion of I-shaped side plate；

   Wherein, anti-expanding block is provided between the big face of the I-shaped side plate and the battery core positioned at battery core orientation both ends.
2. 2. battery modules according to claim 1, it is characterised in that during the I-shaped side plate includes intermediate plate and is located at Between plate both ends and the fixed plate vertical with intermediate plate, intermediate plate extends along battery core orientation, and fixed plate is located at battery core arrangement side To both ends and relative with the big face of battery core, the anti-expanding block is located between fixed plate and the big face of battery core.
3. 3. battery modules according to claim 2, it is characterised in that be provided between the fixed plate and the anti-expanding block End plate.
4. 4. battery modules according to claim 3, it is characterised in that the end plate is provided with groove towards the side of battery core, The anti-expanding block is fixed in groove and contacted with battery core.
5. 5. battery modules according to claim 4, it is characterised in that the anti-expanding block is consolidated by structure glue or lock bolt It is scheduled in the groove.
6. 6. the battery modules according to claim 3 or 4, it is characterised in that be provided with and cover between the anti-expanding block and battery core The insulating trip in the big face of lid battery core.
7. 7. battery modules according to claim 6, it is characterised in that the insulating trip is provided with and anti-expansion Block- matching Through hole, the anti-expanding block contact through through hole with battery core.
8. 8. battery modules according to claim 6, it is characterised in that offered on the end plate and the insulating trip with Between the breach that matches of plate, the intermediate plate is assemblied in breach.
9. 9. battery modules according to claim 3, it is characterised in that the fixed plate both sides are provided with edge, and edge fastens In the outside of the end plate.
10. 10. battery modules according to claim 9, it is characterised in that the end plate both sides are provided with battery core side Battery core limit rib side and the hierarchic structure matched with the edge of fixed plate.