Battery cell mounting module and battery pack

Abstract

The utility model discloses a battery cell mounting module and a battery pack, and belongs to the technical field of power batteries. Comprising a first module side plate and a second module side plate which are oppositely arranged, a first mounting beam is arranged on the outer side of the first module side plate, the first mounting beam is horizontally arranged in the length direction of the first module side plate, and the bottom face of the first mounting beam is lower than the bottom face of the first module side plate; a second mounting beam is arranged on the outer side of the second module side plate, the second mounting beam is horizontally arranged in the length direction of the second module side plate, and the bottom surface of the second mounting beam is lower than that of the second module side plate; a module crimping structure is arranged on the outer side of the first mounting beam, and a crimping surface matched with the module crimping structure is arranged on the outer side of the second mounting beam. The adjacent battery modules can be connected through the crimping between the first mounting beam and the second mounting beam, and the force borne by the modules can be dispersed through the battery pack; the problem that in an existing module connecting mode, stress concentration is prone to occurring, and consequently a module is damaged is solved.

Description

Technical Field

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

[0002] The statements herein only provide background art related to the utility model and do not necessarily constitute prior art.

[0003] With the rapid development of new energy, power batteries are increasingly widely used. As an important part of the battery pack, the connection and fixing method between the module and the lower housing has an important impact on the overall strength of the battery pack.

[0004] In the prior art, modules are connected together by bolts or by bonding with cells using glue. In actual use, in the case of bolt connection, stress concentration is likely to occur at the bolt connection accessories, resulting in module damage; when using the connection method of glue and cells, the bonding area between the cells and the glue is large, the amount of glue used is large, the cost is high and the maintainability is poor.

[0005] In order to enhance the stiffness of the entire battery pack, the modules are connected by connecting pieces, but this will lead to an increase in the weight, the number of components and the cost of the battery pack. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the embodiments of the utility model is to provide a cell installation module and a battery pack, so that the modules can be connected into a whole by an interlocking crimping structure in the box, increasing the stiffness and strength of the entire battery pack.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] In the first aspect, the utility model provides a cell installation module;

[0009] A cell installation module includes a first module side plate and a second module side plate which are oppositely arranged;

[0010] A first installation beam is arranged on the outer side of the first module side plate, the first installation beam is horizontally arranged along the length direction of the first module side plate, and the bottom surface of the first installation beam is lower than the bottom surface of the first module side plate; a second installation beam is arranged on the outer side of the second module side plate, the second installation beam is horizontally arranged along the length direction of the second module side plate, and the bottom surface of the second installation beam is lower than the bottom surface of the second module side plate;

[0011] A module crimping structure is arranged on the outer side of the first installation beam, and a crimping surface matching the module crimping structure is arranged on the outer side of the second installation beam.

[0012] By adopting the above technical solution, adjacent battery cell mounting modules can be connected into a whole through the crimping of the first mounting beam and the second mounting beam, increasing the stiffness and strength of the entire battery pack; there is no need to use bolts for fixation, reducing the stress concentration phenomenon at the bolts.

[0013] In some embodiments, the first mounting beam includes a first plate body and a second plate body disposed on the first plate body, and the width of the second plate body is smaller than the width of the first plate body;

[0014] A crimping surface is formed between the non-connection part of the upper surface of the first plate body and the outer side surface of the second plate body.

[0015] By adopting the above technical solution, a receiving space for the second mounting beam is formed.

[0016] In some embodiments, the first plate body and the second plate body are of a hollow structure.

[0017] By adopting the above technical solution, the weight of the first mounting beam is reduced, avoiding excessive increase in the weight of the battery pack.

[0018] In some embodiments, the second mounting beam includes a third plate body and a fourth plate body disposed on the third plate body, and the width of the fourth plate body is greater than the width of the third plate body;

[0019] A module crimping structure is formed between the non-connection part of the bottom surface of the third plate body and the side wall of the fourth plate body.

[0020] By adopting the above technical solution, the second mounting beam having an inverted L-shaped structure is formed, and the second mounting beam matches the first mounting beam to realize the nested connection of adjacent modules.

[0021] In some embodiments, the third plate body and the fourth plate body are of a hollow structure.

[0022] By adopting the above technical solution, the weight of the second mounting beam is reduced, avoiding excessive increase in the weight of the battery pack.

[0023] In some embodiments, it further includes a lower housing, the first mounting beam and the second mounting beam are disposed on the lower housing, and structural adhesives are respectively disposed between the first module side plate and the second module side plate and the lower housing.

[0024] By adopting the above technical solution, the bonding strength between the battery cell mounting module and the lower housing is ensured, the module and the lower housing are integrally connected, and it is ensured that the force borne by the module can be well transmitted through the lower housing to disperse the stress and avoid stress concentration.

[0025] In some embodiments, the longitudinal distance between the bottom surface of the first module side plate and the bottom surface of the first mounting beam is equal to the longitudinal distance between the bottom surface of the second module side plate and the bottom surface of the second mounting beam.

[0026] By adopting the above technical solution, the connection between the module and the lower housing of the battery pack is made more stable.

[0027] In some embodiments, the first module side plate and the first mounting beam are of an integral structure, and the second module side plate and the second mounting beam are of an integral structure.

[0028] By adopting the above technical solution, the stability of the connection between the first module side plate and the first mounting beam and between the second module side plate and the second mounting beam is ensured.

[0029] In some embodiments, a vertical plate is provided between the first module side plate and the second module side plate, and the vertical plates are respectively located at both ends of the first module side plate.

[0030] By adopting the above technical solution, an installation space for the battery cells is formed among the first module side plate, the second module side plate and the vertical plate for installing the battery cells.

[0031] In a second aspect, the present invention provides a battery pack;

[0032] A battery pack includes a plurality of the above-mentioned battery cell installation modules.

[0033] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0034] 1. For the technical solution provided by the present invention, during use, adjacent battery cell installation modules can adopt an interlocking crimping structure to connect the modules in the battery pack into a whole, increasing the stiffness and strength of the entire battery pack; at the same time, avoiding the use of bolts for fixation and reducing the stress concentration phenomenon at the bolts.

[0035] 2. For the technical solution provided by the present invention, during use, the first mounting beam and the second mounting beam are connected to the lower housing of the battery pack. At the same time, the first mounting beam and the second mounting beam are used as reinforcing beams of the lower housing, eliminating the need for additional design of reinforcing beams, reducing the design difficulty and complexity of the lower housing as well as the weight, cost and number of components of the battery pack.

[0036] 3. For the technical solution provided by the present invention, by fixing the battery cell installation module on the lower housing, the force of the module can be evenly transmitted to the lower housing through the first mounting beam and the second mounting beam. Description of the Drawings

[0037] The accompanying drawings of the specification, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0038] Figure 1 It is a schematic structural diagram of a battery cell installation module provided by an embodiment of the present utility model;

[0039] Figure 2 It is an installation schematic diagram of a battery cell installation module provided by an embodiment of the present utility model;

[0040] Figure 3 It is a cooperation schematic diagram of adjacent battery cell installation modules provided by an embodiment of the present utility model;

[0041] In the figure: 1. Second module side plate; 2. First module side plate; 3. Battery cell installation module; 4. Lower housing; 5. Module crimping structure; 6. Crimping surface; 7. First installation beam; 8. Second installation beam.

[0042] The distances or dimensions between each part are exaggerated for showing the positions of each part, and the schematic diagram is only for illustration. Detailed implementation manners

[0043] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0044] Embodiment 1

[0045] In the existing battery pack, multiple groups of modules are connected by bolts or adhesives, which easily causes stress concentration and damages the modules. To solve the above technical problems, the present utility model proposes a battery cell installation module 3, which integrates the installation beam on the side plate of the module to realize the connection between adjacent modules and the connection with the box body.

[0046] Combined with Figures 1 - 3 , the battery cell installation module 3 includes a first module side plate 2 and a second module side plate 1 arranged opposite to each other. A vertical plate is installed between the first module side plate 2 and the second module side plate 1. The vertical plates are respectively located at both ends of the first module side plate 2 and the second module side plate 1. The vertical plate, the first module side plate 2 and the second module side plate 1 form an installation space for the battery cell to install the battery cell.

[0047] A first mounting beam 7 is installed on the outer side of the first module side plate 2. The first mounting beam 7 is horizontally arranged along the length direction of the first module side plate 2, and the bottom surface of the first mounting beam 7 is lower than the bottom surface of the first module side plate 2. A second mounting beam 8 is installed on the outer side of the second module side plate 1. The second mounting beam 8 is horizontally arranged along the length direction of the second module side plate 1, and the bottom surface of the second mounting beam 8 is lower than the bottom surface of the second module side plate 1.

[0048] To ensure the nested crimping of the first mounting beam 7 and the second mounting beam 8 of adjacent battery cell mounting modules 3, as an implementation manner, the first mounting beam 7 includes a first plate body and a second plate body installed on the first plate body. The width of the second plate body is smaller than the width of the first plate body. A crimping surface 6 is formed between the non-connection part of the upper surface of the first plate body and the outer side surface of the second plate body, and the first mounting beam 7 forming an L-shaped structure is composed. The second mounting beam 8 includes a third plate body and a fourth plate body installed on the third plate body. The width of the fourth plate body is larger than the width of the third plate body. A module crimping structure 5 matching the crimping surface 6 is formed between the non-connection part of the bottom surface of the third plate body and the side wall of the fourth plate body.

[0049] Furthermore, to reduce the weight of the first mounting beam 7 and the second mounting beam 8, the first plate body, the second plate body, the third plate body, and the fourth plate body are set as hollow structures.

[0050] During use, battery cells are installed in the battery cell mounting module 3, and multiple battery cell mounting modules 3 are installed in a battery pack. The battery pack includes a lower housing 4. Multiple battery cell mounting modules 3 are placed in the lower housing 4. The second mounting beam 8 of any battery cell mounting module 3 is crimped with the first mounting beam 7 of its adjacent battery cell mounting module 3. Structural adhesives are respectively coated between the first module side plate 2 and the second module side plate 1 and the lower housing 4. The longitudinal distance between the bottom surface of the first module side plate 2 and the bottom surface of the first mounting beam 7 is equal to the longitudinal distance between the bottom surface of the second module side plate 1 and the bottom surface of the second mounting beam 8, which is the thickness of the structural adhesive.

[0051] Embodiment 2

[0052] Based on the above battery cell mounting module 3, this embodiment also provides a battery pack. The above-mentioned battery cell mounting module 3 is installed in this battery pack. Since the above-mentioned battery cell mounting module 3 has the above technical effects, for the technical effects of the battery pack using the above battery cell mounting module 3, please refer to the above embodiment.

[0053] Further, the battery pack includes a box body composed of an upper shell and a lower shell 4. A plurality of battery cell mounting modules 3 are mounted on the lower shell 4 through a first mounting beam 7 and a second mounting beam 8. Among them, the first mounting beam 7 of any battery cell mounting module 3 is crimped with the second mounting beam 8 of its adjacent battery cell mounting module 3, and the second mounting beam 8 of any battery cell mounting module 3 is crimped with the first mounting beam 7 of its adjacent battery cell mounting module 3. Structural adhesives are respectively coated between the first module side plate 2 and the second module side plate 1 and the lower shell 4, so as to ensure the bonding strength between the battery cell mounting module 3 and the lower shell 4, integrally connect the battery cell mounting module 3 and the lower shell 4, ensure that the force borne by the battery cell mounting module 3 can be well transmitted through the lower shell 4, disperse the stress, and avoid stress concentration.

[0054] At the same time, the first mounting beam 7 and the second mounting beam 8 can serve as reinforcing beams of the lower shell 4 to enhance its stability.

[0055] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, they do not limit the protection scope of the present invention. Those skilled in the art should understand that based on the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A battery cell installation module, characterized in that: It includes a first module side panel and a second module side panel which are arranged opposite to each other; A first mounting beam is disposed on the outer side of the first module side plate, the first mounting beam is horizontally disposed along the length direction of the first module side plate, and the bottom surface of the first mounting beam is lower than the bottom surface of the first module side plate; a second mounting beam is disposed on the outer side of the second module side plate, the second mounting beam is horizontally disposed along the length direction of the second module side plate, and the bottom surface of the second mounting beam is lower than the bottom surface of the second module side plate; A module crimping structure is disposed on the outer side of the first mounting beam, and a crimping surface matching the module crimping structure is disposed on the outer side of the second mounting beam.

2. The battery cell installation module according to claim 1, characterized in that: The first mounting beam comprises a first plate body and a second plate body arranged on the first plate body, wherein the width of the second plate body is smaller than the width of the first plate body; The non-connected portion of the upper surface of the first plate body and the outer side surface of the second plate body form a press-fit surface.

3. The battery cell mounting module according to claim 2, characterized in that: The first plate body and the second plate body are hollow structures.

4. The battery cell installation module according to claim 1, characterized in that: The second mounting beam comprises a third plate body and a fourth plate body disposed on the third plate body, wherein the width of the fourth plate body is greater than the width of the third plate body; The non-connected portion of the bottom surface of the third plate body and the side wall of the fourth plate body form a module crimping structure.

5. The battery cell mounting module according to claim 4, characterized in that: The third plate body and the fourth plate body are hollow structures.

6. The battery cell mounting module according to claim 1, characterized in that: It also includes a lower shell, the first mounting beam and the second mounting beam are arranged on the lower shell, and structural adhesive is respectively arranged between the first module side plate, the second module side plate and the lower shell.

7. The battery cell mounting module according to claim 1, characterized in that: The longitudinal distance between the bottom surface of the first module side plate and the bottom surface of the first mounting beam is equal to the longitudinal distance between the bottom surface of the second module side plate and the bottom surface of the second mounting beam.

8. The battery cell mounting module according to claim 1, characterized in that: The first module side plate and the first mounting beam are an integral structure, and the second module side plate and the second mounting beam are an integral structure.

9. The battery cell mounting module according to claim 1, characterized in that: A vertical plate is arranged between the first module side plate and the second module side plate, and the vertical plates are respectively located at two ends of the first module side plate.

10. A battery pack, characterized in that: It comprises a plurality of battery cell mounting modules as described in any one of claims 1 to 9.

Images